| 1 | ! ============================================================================== |
| 2 | ! Module: builtins (Extended with job control) |
| 3 | ! ============================================================================== |
| 4 | module builtins |
| 5 | use shell_types |
| 6 | use system_interface |
| 7 | use io_helpers |
| 8 | use job_control |
| 9 | use test_builtin |
| 10 | use readline |
| 11 | use shell_config |
| 12 | use aliases |
| 13 | use shell_options |
| 14 | use command_builtin, only: find_command_in_path, builtin_which, builtin_command, find_executable_in_path, & |
| 15 | cmd_builtin_type => builtin_type |
| 16 | use directory_builtin, only: builtin_pushd, builtin_popd, builtin_dirs |
| 17 | use performance |
| 18 | use parser |
| 19 | use coprocess |
| 20 | use substitution |
| 21 | use signal_handling |
| 22 | use getopts_builtin |
| 23 | use printf_builtin |
| 24 | use read_builtin |
| 25 | use iso_fortran_env, only: output_unit, error_unit |
| 26 | use completion |
| 27 | use iso_c_binding |
| 28 | use builtin_interface |
| 29 | #ifdef USE_MEMORY_POOL |
| 30 | use string_pool |
| 31 | use memory_dashboard |
| 32 | #endif |
| 33 | implicit none |
| 34 | |
| 35 | ! Module constant for dashboard tracking |
| 36 | #ifdef USE_MEMORY_POOL |
| 37 | integer, parameter :: MOD_BUILTINS = 7 ! Module ID for dashboard |
| 38 | #endif |
| 39 | |
| 40 | ! C interface for system() call |
| 41 | interface |
| 42 | function c_system(command) bind(C, name="system") |
| 43 | use iso_c_binding |
| 44 | character(kind=c_char), intent(in) :: command(*) |
| 45 | integer(c_int) :: c_system |
| 46 | end function c_system |
| 47 | end interface |
| 48 | |
| 49 | contains |
| 50 | |
| 51 | ! Initialize builtin interface by registering function pointers |
| 52 | subroutine init_builtins() |
| 53 | is_builtin_ptr => is_builtin_impl |
| 54 | execute_builtin_ptr => execute_builtin_impl |
| 55 | end subroutine init_builtins |
| 56 | |
| 57 | function is_builtin_impl(cmd_name) result(is_built) |
| 58 | character(len=*), intent(in) :: cmd_name |
| 59 | logical :: is_built |
| 60 | |
| 61 | is_built = (trim(cmd_name) == 'exit' .or. & |
| 62 | trim(cmd_name) == 'cd' .or. & |
| 63 | trim(cmd_name) == 'pwd' .or. & |
| 64 | trim(cmd_name) == 'pushd' .or. & |
| 65 | trim(cmd_name) == 'popd' .or. & |
| 66 | trim(cmd_name) == 'dirs' .or. & |
| 67 | trim(cmd_name) == 'prevd' .or. & |
| 68 | trim(cmd_name) == 'nextd' .or. & |
| 69 | trim(cmd_name) == 'dirh' .or. & |
| 70 | trim(cmd_name) == 'export' .or. & |
| 71 | trim(cmd_name) == 'echo' .or. & |
| 72 | trim(cmd_name) == 'jobs' .or. & |
| 73 | trim(cmd_name) == 'fg' .or. & |
| 74 | trim(cmd_name) == 'bg' .or. & |
| 75 | trim(cmd_name) == 'disown' .or. & |
| 76 | trim(cmd_name) == 'source' .or. & |
| 77 | trim(cmd_name) == '.' .or. & |
| 78 | trim(cmd_name) == ':' .or. & |
| 79 | trim(cmd_name) == 'history' .or. & |
| 80 | trim(cmd_name) == 'kill' .or. & |
| 81 | trim(cmd_name) == 'wait' .or. & |
| 82 | trim(cmd_name) == 'trap' .or. & |
| 83 | trim(cmd_name) == 'config' .or. & |
| 84 | trim(cmd_name) == 'alias' .or. & |
| 85 | trim(cmd_name) == 'unalias' .or. & |
| 86 | trim(cmd_name) == 'abbr' .or. & |
| 87 | trim(cmd_name) == 'help' .or. & |
| 88 | trim(cmd_name) == 'perf' .or. & |
| 89 | trim(cmd_name) == 'memory' .or. & |
| 90 | trim(cmd_name) == 'rawtest' .or. & |
| 91 | trim(cmd_name) == 'defun' .or. & |
| 92 | trim(cmd_name) == 'set' .or. & |
| 93 | trim(cmd_name) == 'shopt' .or. & |
| 94 | trim(cmd_name) == 'type' .or. & |
| 95 | trim(cmd_name) == 'which' .or. & |
| 96 | trim(cmd_name) == 'command' .or. & |
| 97 | trim(cmd_name) == 'unset' .or. & |
| 98 | trim(cmd_name) == 'readonly' .or. & |
| 99 | trim(cmd_name) == 'declare' .or. & |
| 100 | trim(cmd_name) == 'printenv' .or. & |
| 101 | trim(cmd_name) == 'local' .or. & |
| 102 | trim(cmd_name) == 'shift' .or. & |
| 103 | trim(cmd_name) == 'break' .or. & |
| 104 | trim(cmd_name) == 'continue' .or. & |
| 105 | trim(cmd_name) == 'return' .or. & |
| 106 | trim(cmd_name) == 'exec' .or. & |
| 107 | trim(cmd_name) == 'eval' .or. & |
| 108 | trim(cmd_name) == 'hash' .or. & |
| 109 | trim(cmd_name) == 'umask' .or. & |
| 110 | trim(cmd_name) == 'ulimit' .or. & |
| 111 | trim(cmd_name) == 'times' .or. & |
| 112 | trim(cmd_name) == 'let' .or. & |
| 113 | trim(cmd_name) == 'getopts' .or. & |
| 114 | trim(cmd_name) == 'printf' .or. & |
| 115 | trim(cmd_name) == 'read' .or. & |
| 116 | trim(cmd_name) == 'fc' .or. & |
| 117 | trim(cmd_name) == 'coproc' .or. & |
| 118 | trim(cmd_name) == 'complete' .or. & |
| 119 | trim(cmd_name) == 'compgen' .or. & |
| 120 | is_test_command(cmd_name)) |
| 121 | end function |
| 122 | |
| 123 | subroutine execute_builtin_impl(cmd, shell) |
| 124 | type(command_t), intent(in) :: cmd |
| 125 | type(shell_state_t), intent(inout) :: shell |
| 126 | |
| 127 | select case(trim(cmd%tokens(1))) |
| 128 | case('exit') |
| 129 | call builtin_exit(cmd, shell) |
| 130 | case('cd') |
| 131 | call builtin_cd(cmd, shell) |
| 132 | case('pwd') |
| 133 | call builtin_pwd(cmd, shell) |
| 134 | case('pushd') |
| 135 | call builtin_pushd(cmd, shell) |
| 136 | case('popd') |
| 137 | call builtin_popd(cmd, shell) |
| 138 | case('dirs') |
| 139 | call builtin_dirs(cmd, shell) |
| 140 | case('prevd') |
| 141 | call builtin_prevd(cmd, shell) |
| 142 | case('nextd') |
| 143 | call builtin_nextd(cmd, shell) |
| 144 | case('dirh') |
| 145 | call builtin_dirh(cmd, shell) |
| 146 | case('export') |
| 147 | call builtin_export(cmd, shell) |
| 148 | case('echo') |
| 149 | call builtin_echo(cmd, shell) |
| 150 | case('jobs') |
| 151 | call builtin_jobs(cmd, shell) |
| 152 | case('fg') |
| 153 | call builtin_fg(cmd, shell) |
| 154 | case('bg') |
| 155 | call builtin_bg(cmd, shell) |
| 156 | case('disown') |
| 157 | call builtin_disown(cmd, shell) |
| 158 | case('source', '.') |
| 159 | call builtin_source(cmd, shell) |
| 160 | case(':') |
| 161 | ! Colon builtin - null command, always returns success |
| 162 | shell%last_exit_status = 0 |
| 163 | case('history') |
| 164 | call builtin_history(cmd, shell) |
| 165 | case('kill') |
| 166 | call builtin_kill(cmd, shell) |
| 167 | case('wait') |
| 168 | call builtin_wait(cmd, shell) |
| 169 | case('trap') |
| 170 | call builtin_trap(cmd, shell) |
| 171 | case('config') |
| 172 | call builtin_config(cmd, shell) |
| 173 | case('command') |
| 174 | call builtin_command(cmd, shell) |
| 175 | case('alias') |
| 176 | call builtin_alias(cmd, shell) |
| 177 | case('unalias') |
| 178 | call builtin_unalias(cmd, shell) |
| 179 | case('abbr') |
| 180 | call builtin_abbr(cmd, shell) |
| 181 | case('help') |
| 182 | call builtin_help(cmd, shell) |
| 183 | case('perf') |
| 184 | call builtin_perf(cmd, shell) |
| 185 | case('memory') |
| 186 | call builtin_memory(cmd, shell) |
| 187 | case('rawtest') |
| 188 | call builtin_rawtest(cmd, shell) |
| 189 | case('defun') |
| 190 | call builtin_defun(cmd, shell) |
| 191 | case('test', '[', '[[') |
| 192 | call execute_test_command(cmd, shell) |
| 193 | case('set') |
| 194 | call builtin_set(cmd, shell) |
| 195 | case('shopt') |
| 196 | call builtin_shopt(cmd, shell) |
| 197 | case('type') |
| 198 | call cmd_builtin_type(cmd, shell) |
| 199 | case('which') |
| 200 | call builtin_which(cmd, shell) |
| 201 | case('unset') |
| 202 | call builtin_unset(cmd, shell) |
| 203 | case('readonly') |
| 204 | call builtin_readonly(cmd, shell) |
| 205 | case('declare') |
| 206 | call builtin_declare(cmd, shell) |
| 207 | case('printenv') |
| 208 | call builtin_printenv(cmd, shell) |
| 209 | case('local') |
| 210 | call builtin_local(cmd, shell) |
| 211 | case('shift') |
| 212 | call builtin_shift(cmd, shell) |
| 213 | case('break') |
| 214 | call builtin_break(cmd, shell) |
| 215 | case('continue') |
| 216 | call builtin_continue(cmd, shell) |
| 217 | case('return') |
| 218 | call builtin_return(cmd, shell) |
| 219 | case('exec') |
| 220 | call builtin_exec(cmd, shell) |
| 221 | case('eval') |
| 222 | call builtin_eval(cmd, shell) |
| 223 | case('hash') |
| 224 | call builtin_hash(cmd, shell) |
| 225 | case('umask') |
| 226 | call builtin_umask(cmd, shell) |
| 227 | case('ulimit') |
| 228 | call builtin_ulimit(cmd, shell) |
| 229 | case('times') |
| 230 | call builtin_times(cmd, shell) |
| 231 | case('let') |
| 232 | call builtin_let(cmd, shell) |
| 233 | case('getopts') |
| 234 | call builtin_getopts(cmd, shell) |
| 235 | case('printf') |
| 236 | call builtin_printf(cmd, shell) |
| 237 | case('read') |
| 238 | call builtin_read(cmd, shell) |
| 239 | case('fc') |
| 240 | call builtin_fc(cmd, shell) |
| 241 | case('coproc') |
| 242 | call builtin_coproc(cmd, shell) |
| 243 | case('complete') |
| 244 | call builtin_complete(cmd, shell) |
| 245 | case('compgen') |
| 246 | call builtin_compgen(cmd, shell) |
| 247 | case default |
| 248 | ! Should not reach here if is_builtin works correctly |
| 249 | shell%last_exit_status = 1 |
| 250 | end select |
| 251 | end subroutine |
| 252 | |
| 253 | subroutine builtin_exit(cmd, shell) |
| 254 | use signal_handling, only: get_trap_command, is_trap_inherited |
| 255 | use grammar_parser, only: parse_command_line |
| 256 | use ast_executor, only: execute_ast_node |
| 257 | use command_tree, only: command_node_t, destroy_command_node |
| 258 | type(command_t), intent(in) :: cmd |
| 259 | type(shell_state_t), intent(inout) :: shell |
| 260 | integer :: exit_code, iostat |
| 261 | character(len=4096) :: trap_command |
| 262 | type(command_node_t), pointer :: trap_ast |
| 263 | integer :: saved_exit_status, trap_exit_code |
| 264 | |
| 265 | ! Execute EXIT trap before exiting (TRAP_EXIT = 0) |
| 266 | if (.not. shell%executing_trap .and. .not. shell%exit_trap_executed .and. & |
| 267 | .not. is_trap_inherited(shell, 0)) then |
| 268 | trap_command = get_trap_command(shell, 0) |
| 269 | |
| 270 | if (len_trim(trap_command) > 0) then |
| 271 | shell%exit_trap_executed = .true. |
| 272 | saved_exit_status = shell%last_exit_status |
| 273 | shell%executing_trap = .true. |
| 274 | |
| 275 | trap_ast => parse_command_line(trim(trap_command)) |
| 276 | if (associated(trap_ast)) then |
| 277 | trap_exit_code = execute_ast_node(trap_ast, shell) |
| 278 | call destroy_command_node(trap_ast) |
| 279 | end if |
| 280 | |
| 281 | shell%executing_trap = .false. |
| 282 | shell%last_exit_status = saved_exit_status |
| 283 | end if |
| 284 | end if |
| 285 | |
| 286 | shell%running = .false. |
| 287 | if (cmd%num_tokens > 1) then |
| 288 | ! Parse the exit code from the argument |
| 289 | read(cmd%tokens(2), *, iostat=iostat) exit_code |
| 290 | if (iostat == 0) then |
| 291 | shell%last_exit_status = exit_code |
| 292 | else |
| 293 | ! Invalid exit code argument - treat as syntax error (exit 2) |
| 294 | shell%last_exit_status = 2 |
| 295 | end if |
| 296 | end if |
| 297 | end subroutine |
| 298 | |
| 299 | subroutine builtin_cd(cmd, shell) |
| 300 | type(command_t), intent(in) :: cmd |
| 301 | type(shell_state_t), intent(inout) :: shell |
| 302 | #ifdef USE_MEMORY_POOL |
| 303 | type(string_ref) :: target_dir_ref |
| 304 | character(len=:), allocatable :: temp_str |
| 305 | #else |
| 306 | character(len=:), allocatable :: target_dir |
| 307 | #endif |
| 308 | character(len=MAX_PATH_LEN) :: old_cwd |
| 309 | logical :: print_dir |
| 310 | |
| 311 | print_dir = .false. |
| 312 | |
| 313 | ! Save current directory for OLDPWD |
| 314 | old_cwd = shell%cwd |
| 315 | |
| 316 | #ifdef USE_MEMORY_POOL |
| 317 | ! Get pooled buffer for target directory |
| 318 | target_dir_ref = pool_get_string(MAX_PATH_LEN) |
| 319 | call dashboard_track_allocation(MOD_BUILTINS, MAX_PATH_LEN, 4) |
| 320 | #endif |
| 321 | |
| 322 | if (cmd%num_tokens == 1) then |
| 323 | ! cd with no arguments goes to HOME |
| 324 | #ifdef USE_MEMORY_POOL |
| 325 | temp_str = get_environment_var('HOME') |
| 326 | target_dir_ref%data = temp_str |
| 327 | if (allocated(temp_str)) deallocate(temp_str) |
| 328 | #else |
| 329 | target_dir = get_environment_var('HOME') |
| 330 | #endif |
| 331 | else if (trim(cmd%tokens(2)) == '-') then |
| 332 | ! cd - goes to OLDPWD and prints it |
| 333 | if (len_trim(shell%oldpwd) == 0) then |
| 334 | write(error_unit, '(a)') 'cd: OLDPWD not set' |
| 335 | shell%last_exit_status = 1 |
| 336 | #ifdef USE_MEMORY_POOL |
| 337 | call pool_release_string(target_dir_ref) |
| 338 | call dashboard_track_deallocation(MOD_BUILTINS, MAX_PATH_LEN, 4) |
| 339 | #endif |
| 340 | return |
| 341 | end if |
| 342 | #ifdef USE_MEMORY_POOL |
| 343 | target_dir_ref%data = trim(shell%oldpwd) |
| 344 | #else |
| 345 | target_dir = trim(shell%oldpwd) |
| 346 | #endif |
| 347 | print_dir = .true. |
| 348 | else |
| 349 | ! Check if directory contains slash - if so, don't use CDPATH |
| 350 | if (index(cmd%tokens(2), '/') == 0) then |
| 351 | ! Try CDPATH directories |
| 352 | block |
| 353 | character(len=4096) :: cdpath, path_elem |
| 354 | character(len=MAX_PATH_LEN) :: test_path |
| 355 | integer :: start_pos, colon_pos |
| 356 | logical :: found |
| 357 | |
| 358 | ! Check both shell variable and environment variable |
| 359 | cdpath = get_shell_variable(shell, 'CDPATH') |
| 360 | if (len_trim(cdpath) == 0) then |
| 361 | cdpath = get_environment_var('CDPATH') |
| 362 | end if |
| 363 | found = .false. |
| 364 | |
| 365 | if (len_trim(cdpath) > 0) then |
| 366 | start_pos = 1 |
| 367 | do while (start_pos <= len_trim(cdpath)) |
| 368 | colon_pos = index(cdpath(start_pos:), ':') |
| 369 | if (colon_pos > 0) then |
| 370 | path_elem = cdpath(start_pos:start_pos+colon_pos-2) |
| 371 | start_pos = start_pos + colon_pos |
| 372 | else |
| 373 | path_elem = cdpath(start_pos:) |
| 374 | start_pos = len_trim(cdpath) + 1 |
| 375 | end if |
| 376 | |
| 377 | ! Construct test path |
| 378 | if (len_trim(path_elem) > 0) then |
| 379 | test_path = trim(path_elem) // '/' // trim(cmd%tokens(2)) |
| 380 | else |
| 381 | test_path = trim(cmd%tokens(2)) |
| 382 | end if |
| 383 | |
| 384 | ! Test if this path exists and is a directory |
| 385 | if (test_is_directory(test_path)) then |
| 386 | #ifdef USE_MEMORY_POOL |
| 387 | target_dir_ref%data = trim(test_path) |
| 388 | #else |
| 389 | target_dir = trim(test_path) |
| 390 | #endif |
| 391 | found = .true. |
| 392 | print_dir = .true. ! Print directory when using CDPATH |
| 393 | exit |
| 394 | end if |
| 395 | end do |
| 396 | end if |
| 397 | |
| 398 | if (.not. found) then |
| 399 | ! CDPATH didn't find it, use original argument |
| 400 | #ifdef USE_MEMORY_POOL |
| 401 | target_dir_ref%data = trim(cmd%tokens(2)) |
| 402 | #else |
| 403 | target_dir = trim(cmd%tokens(2)) |
| 404 | #endif |
| 405 | end if |
| 406 | end block |
| 407 | else |
| 408 | ! Contains slash - use as-is |
| 409 | #ifdef USE_MEMORY_POOL |
| 410 | target_dir_ref%data = trim(cmd%tokens(2)) |
| 411 | #else |
| 412 | target_dir = trim(cmd%tokens(2)) |
| 413 | #endif |
| 414 | end if |
| 415 | end if |
| 416 | |
| 417 | #ifdef USE_MEMORY_POOL |
| 418 | if (change_directory(target_dir_ref%data)) then |
| 419 | #else |
| 420 | if (change_directory(target_dir)) then |
| 421 | #endif |
| 422 | ! Update OLDPWD before changing cwd |
| 423 | shell%oldpwd = old_cwd |
| 424 | ! POSIX: Use logical path (preserve symlinks) unless -P is specified |
| 425 | ! For absolute paths, use them as-is. For relative paths, resolve logically. |
| 426 | #ifdef USE_MEMORY_POOL |
| 427 | if (len(target_dir_ref%data) > 0 .and. target_dir_ref%data(1:1) == '/') then |
| 428 | ! Absolute path - use it directly (preserves symlinks like /tmp) |
| 429 | ! Strip trailing slashes (but keep root /) |
| 430 | shell%cwd = target_dir_ref%data |
| 431 | do while (len_trim(shell%cwd) > 1 .and. shell%cwd(len_trim(shell%cwd):len_trim(shell%cwd)) == '/') |
| 432 | shell%cwd(len_trim(shell%cwd):len_trim(shell%cwd)) = ' ' |
| 433 | end do |
| 434 | #else |
| 435 | if (len(target_dir) > 0 .and. target_dir(1:1) == '/') then |
| 436 | ! Absolute path - use it directly (preserves symlinks like /tmp) |
| 437 | ! Strip trailing slashes (but keep root /) |
| 438 | shell%cwd = target_dir |
| 439 | do while (len_trim(shell%cwd) > 1 .and. shell%cwd(len_trim(shell%cwd):len_trim(shell%cwd)) == '/') |
| 440 | shell%cwd(len_trim(shell%cwd):len_trim(shell%cwd)) = ' ' |
| 441 | end do |
| 442 | #endif |
| 443 | else |
| 444 | ! Relative path — resolve logically against $PWD (POSIX default -L behavior) |
| 445 | block |
| 446 | character(len=MAX_PATH_LEN) :: logical_path |
| 447 | integer :: lp_len, slash_pos |
| 448 | #ifdef USE_MEMORY_POOL |
| 449 | logical_path = trim(old_cwd) // '/' // trim(target_dir_ref%data) |
| 450 | #else |
| 451 | logical_path = trim(old_cwd) // '/' // trim(target_dir) |
| 452 | #endif |
| 453 | ! Normalize: resolve . and .. components |
| 454 | call normalize_path(logical_path) |
| 455 | lp_len = len_trim(logical_path) |
| 456 | if (lp_len > 0) then |
| 457 | shell%cwd = logical_path(1:lp_len) |
| 458 | else |
| 459 | shell%cwd = get_current_directory() |
| 460 | end if |
| 461 | end block |
| 462 | end if |
| 463 | |
| 464 | ! Update PWD and OLDPWD environment variables |
| 465 | if (.not. set_environment_var('PWD', trim(shell%cwd))) then |
| 466 | ! Ignore error, not critical |
| 467 | end if |
| 468 | if (.not. set_environment_var('OLDPWD', trim(shell%oldpwd))) then |
| 469 | ! Ignore error, not critical |
| 470 | end if |
| 471 | |
| 472 | ! Update terminal title after directory change |
| 473 | if (shell%is_interactive .and. shell%term_supports_color) then |
| 474 | call set_terminal_title(trim(shell%username) // '@' // trim(shell%hostname) // ': ' // trim(shell%cwd)) |
| 475 | end if |
| 476 | |
| 477 | ! Add OLD directory to history so prevd can go back to it (Fish-style prevd/nextd) |
| 478 | call add_to_dir_history(shell, old_cwd) |
| 479 | |
| 480 | ! Add NEW directory to history so nextd can go forward to it |
| 481 | call add_to_dir_history(shell, shell%cwd) |
| 482 | |
| 483 | ! Print new directory if cd - or CDPATH was used |
| 484 | if (print_dir) then |
| 485 | write(output_unit, '(a)') trim(shell%cwd) |
| 486 | flush(output_unit) |
| 487 | end if |
| 488 | |
| 489 | shell%last_exit_status = 0 |
| 490 | else |
| 491 | #ifdef USE_MEMORY_POOL |
| 492 | write(error_unit, '(a)') 'cd: cannot access ' // trim(target_dir_ref%data) // & |
| 493 | ': No such file or directory. Use "pwd" to see current location.' |
| 494 | #else |
| 495 | write(error_unit, '(a)') 'cd: cannot access ' // trim(target_dir) // & |
| 496 | ': No such file or directory. Use "pwd" to see current location.' |
| 497 | #endif |
| 498 | shell%last_exit_status = 1 |
| 499 | end if |
| 500 | |
| 501 | #ifdef USE_MEMORY_POOL |
| 502 | ! Release pooled buffer |
| 503 | call pool_release_string(target_dir_ref) |
| 504 | call dashboard_track_deallocation(MOD_BUILTINS, MAX_PATH_LEN, 4) |
| 505 | #endif |
| 506 | end subroutine |
| 507 | |
| 508 | ! Resolve . and .. components in a path logically (no syscalls) |
| 509 | subroutine normalize_path(path) |
| 510 | character(len=*), intent(inout) :: path |
| 511 | character(len=256) :: components(64) |
| 512 | integer :: num_comp, i, start, plen, out_len |
| 513 | character(len=len(path)) :: result |
| 514 | |
| 515 | plen = len_trim(path) |
| 516 | if (plen == 0) return |
| 517 | |
| 518 | ! Split path on / |
| 519 | num_comp = 0 |
| 520 | start = 1 |
| 521 | ! Skip leading / |
| 522 | if (path(1:1) == '/') start = 2 |
| 523 | |
| 524 | do while (start <= plen) |
| 525 | i = index(path(start:plen), '/') |
| 526 | if (i == 0) then |
| 527 | i = plen - start + 1 |
| 528 | else |
| 529 | i = i - 1 |
| 530 | end if |
| 531 | if (i > 0) then |
| 532 | if (path(start:start+i-1) == '..') then |
| 533 | ! Pop last component |
| 534 | if (num_comp > 0) num_comp = num_comp - 1 |
| 535 | else if (path(start:start+i-1) /= '.' .and. i > 0) then |
| 536 | ! Push component |
| 537 | num_comp = num_comp + 1 |
| 538 | components(num_comp) = path(start:start+i-1) |
| 539 | end if |
| 540 | end if |
| 541 | start = start + i + 1 |
| 542 | end do |
| 543 | |
| 544 | ! Reconstruct |
| 545 | result = '/' |
| 546 | out_len = 1 |
| 547 | do i = 1, num_comp |
| 548 | if (i > 1) then |
| 549 | result(out_len+1:out_len+1) = '/' |
| 550 | out_len = out_len + 1 |
| 551 | end if |
| 552 | result(out_len+1:out_len+len_trim(components(i))) = trim(components(i)) |
| 553 | out_len = out_len + len_trim(components(i)) |
| 554 | end do |
| 555 | |
| 556 | path = result(1:out_len) |
| 557 | end subroutine |
| 558 | |
| 559 | subroutine builtin_pwd(cmd, shell) |
| 560 | type(command_t), intent(in) :: cmd |
| 561 | type(shell_state_t), intent(inout) :: shell |
| 562 | |
| 563 | if (.false.) print *, cmd%num_tokens ! Silence unused warning |
| 564 | |
| 565 | ! Use FD-aware I/O to respect redirections |
| 566 | call write_stdout(trim(shell%cwd)) |
| 567 | shell%last_exit_status = 0 |
| 568 | end subroutine |
| 569 | |
| 570 | subroutine builtin_export(cmd, shell) |
| 571 | use variables, only: set_shell_variable, get_shell_variable |
| 572 | use system_interface, only: get_environ_entry |
| 573 | type(command_t), intent(in) :: cmd |
| 574 | type(shell_state_t), intent(inout) :: shell |
| 575 | integer :: eq_pos, i, j, arg_idx |
| 576 | character(len=MAX_TOKEN_LEN) :: var_name |
| 577 | character(len=:), allocatable :: var_value |
| 578 | logical :: print_mode, found, unexport_mode |
| 579 | character(len=:), allocatable :: env_entry |
| 580 | |
| 581 | print_mode = .false. |
| 582 | unexport_mode = .false. |
| 583 | arg_idx = 2 |
| 584 | |
| 585 | ! Parse options |
| 586 | do while (arg_idx <= cmd%num_tokens) |
| 587 | if (trim(cmd%tokens(arg_idx)) == '-p') then |
| 588 | print_mode = .true. |
| 589 | arg_idx = arg_idx + 1 |
| 590 | else if (trim(cmd%tokens(arg_idx)) == '-n') then |
| 591 | unexport_mode = .true. |
| 592 | arg_idx = arg_idx + 1 |
| 593 | else |
| 594 | exit |
| 595 | end if |
| 596 | end do |
| 597 | |
| 598 | if (cmd%num_tokens < 2 .or. (print_mode .and. arg_idx > cmd%num_tokens)) then |
| 599 | ! No arguments or -p with no args: print all exported variables |
| 600 | print_mode = .true. |
| 601 | end if |
| 602 | |
| 603 | ! Handle export -n: unexport variables |
| 604 | if (unexport_mode) then |
| 605 | do i = arg_idx, cmd%num_tokens |
| 606 | var_name = trim(cmd%tokens(i)) |
| 607 | do j = 1, shell%num_variables |
| 608 | if (trim(shell%variables(j)%name) == var_name) then |
| 609 | shell%variables(j)%exported = .false. |
| 610 | ! Remove from environment |
| 611 | call unset_environment_var(var_name) |
| 612 | exit |
| 613 | end if |
| 614 | end do |
| 615 | end do |
| 616 | shell%last_exit_status = 0 |
| 617 | return |
| 618 | end if |
| 619 | |
| 620 | if (print_mode) then |
| 621 | ! Print all environment variables in declare -x format (matches bash export -p) |
| 622 | i = 0 |
| 623 | do |
| 624 | env_entry = get_environ_entry(i) |
| 625 | if (.not. allocated(env_entry) .or. len(env_entry) == 0) exit |
| 626 | ! Format: declare -x VAR="value" |
| 627 | block |
| 628 | integer :: eqp |
| 629 | eqp = index(env_entry, '=') |
| 630 | if (eqp > 0) then |
| 631 | write(output_unit, '(a)') 'declare -x ' // env_entry(:eqp) // '"' // & |
| 632 | trim(env_entry(eqp+1:)) // '"' |
| 633 | else |
| 634 | write(output_unit, '(a)') 'declare -x ' // trim(env_entry) |
| 635 | end if |
| 636 | end block |
| 637 | if (allocated(env_entry)) deallocate(env_entry) |
| 638 | i = i + 1 |
| 639 | end do |
| 640 | shell%last_exit_status = 0 |
| 641 | return |
| 642 | end if |
| 643 | |
| 644 | ! Process each argument (arg_idx already points past parsed options) |
| 645 | do i = arg_idx, cmd%num_tokens |
| 646 | eq_pos = index(cmd%tokens(i), '=') |
| 647 | |
| 648 | if (eq_pos > 0) then |
| 649 | ! VAR=value form - set and export |
| 650 | var_name = cmd%tokens(i)(:eq_pos-1) |
| 651 | |
| 652 | ! Validate variable name: must start with letter or underscore |
| 653 | if (len_trim(var_name) == 0 .or. & |
| 654 | (.not. (var_name(1:1) >= 'a' .and. var_name(1:1) <= 'z') .and. & |
| 655 | .not. (var_name(1:1) >= 'A' .and. var_name(1:1) <= 'Z') .and. & |
| 656 | var_name(1:1) /= '_')) then |
| 657 | write(error_unit, '(a)') 'export: `' // trim(var_name) // "': not a valid identifier" |
| 658 | shell%last_exit_status = 1 |
| 659 | cycle |
| 660 | end if |
| 661 | |
| 662 | if (allocated(cmd%token_lengths) .and. i <= size(cmd%token_lengths) .and. & |
| 663 | cmd%token_lengths(i) > eq_pos) then |
| 664 | var_value = cmd%tokens(i)(eq_pos+1:cmd%token_lengths(i)) |
| 665 | else |
| 666 | var_value = trim(cmd%tokens(i)(eq_pos+1:)) |
| 667 | end if |
| 668 | |
| 669 | ! Set as shell variable first |
| 670 | call set_shell_variable(shell, trim(var_name), var_value) |
| 671 | |
| 672 | ! Mark as exported |
| 673 | do j = 1, shell%num_variables |
| 674 | if (trim(shell%variables(j)%name) == trim(var_name)) then |
| 675 | shell%variables(j)%exported = .true. |
| 676 | ! Also set in environment |
| 677 | if (.not. set_environment_var(trim(var_name), var_value)) then |
| 678 | write(error_unit, '(a)') 'export: failed to set environment variable' |
| 679 | shell%last_exit_status = 1 |
| 680 | return |
| 681 | end if |
| 682 | exit |
| 683 | end if |
| 684 | end do |
| 685 | else |
| 686 | ! Just VAR - mark existing variable as exported |
| 687 | var_name = trim(cmd%tokens(i)) |
| 688 | |
| 689 | ! Validate variable name |
| 690 | if (len_trim(var_name) == 0 .or. & |
| 691 | (.not. (var_name(1:1) >= 'a' .and. var_name(1:1) <= 'z') .and. & |
| 692 | .not. (var_name(1:1) >= 'A' .and. var_name(1:1) <= 'Z') .and. & |
| 693 | var_name(1:1) /= '_')) then |
| 694 | write(error_unit, '(a)') 'export: `' // trim(var_name) // "': not a valid identifier" |
| 695 | shell%last_exit_status = 1 |
| 696 | cycle |
| 697 | end if |
| 698 | |
| 699 | found = .false. |
| 700 | |
| 701 | do j = 1, shell%num_variables |
| 702 | if (trim(shell%variables(j)%name) == var_name) then |
| 703 | shell%variables(j)%exported = .true. |
| 704 | found = .true. |
| 705 | ! Export current value to environment |
| 706 | if (.not. set_environment_var(var_name, trim(shell%variables(j)%value))) then |
| 707 | write(error_unit, '(a)') 'export: failed to set environment variable' |
| 708 | shell%last_exit_status = 1 |
| 709 | return |
| 710 | end if |
| 711 | exit |
| 712 | end if |
| 713 | end do |
| 714 | |
| 715 | if (.not. found) then |
| 716 | ! Check special built-in variables stored in dedicated fields |
| 717 | select case (trim(var_name)) |
| 718 | case ('PS1') |
| 719 | found = .true. |
| 720 | if (.not. set_environment_var(var_name, trim(shell%ps1))) then |
| 721 | write(error_unit, '(a)') 'export: failed to set environment variable' |
| 722 | end if |
| 723 | case ('PS2') |
| 724 | found = .true. |
| 725 | if (.not. set_environment_var(var_name, trim(shell%ps2))) then |
| 726 | write(error_unit, '(a)') 'export: failed to set environment variable' |
| 727 | end if |
| 728 | case default |
| 729 | ! Variable doesn't exist, create it with empty value and export |
| 730 | call set_shell_variable(shell, var_name, '') |
| 731 | do j = 1, shell%num_variables |
| 732 | if (trim(shell%variables(j)%name) == var_name) then |
| 733 | shell%variables(j)%exported = .true. |
| 734 | if (.not. set_environment_var(var_name, '')) then |
| 735 | write(error_unit, '(a)') 'export: failed to set environment variable' |
| 736 | shell%last_exit_status = 1 |
| 737 | return |
| 738 | end if |
| 739 | exit |
| 740 | end if |
| 741 | end do |
| 742 | end select |
| 743 | end if |
| 744 | end if |
| 745 | end do |
| 746 | |
| 747 | shell%last_exit_status = 0 |
| 748 | end subroutine |
| 749 | |
| 750 | subroutine builtin_echo(cmd, shell) |
| 751 | use io_helpers, only: write_stdout_checked, write_stdout_nonl_checked |
| 752 | type(command_t), intent(in) :: cmd |
| 753 | type(shell_state_t), intent(inout) :: shell |
| 754 | integer :: i, j, len_token, start_token |
| 755 | logical :: first, suppress_newline, write_ok, had_error, interpret_escapes, stop_output |
| 756 | character(len=:), allocatable :: processed |
| 757 | character(len=MAX_TOKEN_LEN) :: token |
| 758 | |
| 759 | had_error = .false. |
| 760 | |
| 761 | ! POSIX echo implementation - interprets backslash escape sequences |
| 762 | if (.not. allocated(cmd%tokens) .or. cmd%num_tokens < 1) then |
| 763 | call write_stdout_checked('', write_ok) |
| 764 | if (.not. write_ok) then |
| 765 | call write_stderr('fortsh: echo: write error: Bad file descriptor') |
| 766 | shell%last_exit_status = 1 |
| 767 | else |
| 768 | shell%last_exit_status = 0 |
| 769 | end if |
| 770 | return |
| 771 | end if |
| 772 | |
| 773 | first = .true. |
| 774 | suppress_newline = .false. |
| 775 | stop_output = .false. |
| 776 | interpret_escapes = .false. ! Bash default: do NOT interpret escapes (use -e to enable) |
| 777 | start_token = 2 |
| 778 | |
| 779 | ! Parse options (must be first arguments) |
| 780 | do i = 2, cmd%num_tokens |
| 781 | token = cmd%tokens(i) |
| 782 | if (token(1:1) /= '-' .or. len_trim(token) < 2) exit |
| 783 | |
| 784 | ! Check for valid option characters |
| 785 | if (trim(token) == '-n') then |
| 786 | suppress_newline = .true. |
| 787 | start_token = i + 1 |
| 788 | else if (trim(token) == '-e') then |
| 789 | interpret_escapes = .true. |
| 790 | start_token = i + 1 |
| 791 | else if (trim(token) == '-E') then |
| 792 | interpret_escapes = .false. |
| 793 | start_token = i + 1 |
| 794 | else if (trim(token) == '-ne' .or. trim(token) == '-en') then |
| 795 | suppress_newline = .true. |
| 796 | interpret_escapes = .true. |
| 797 | start_token = i + 1 |
| 798 | else if (trim(token) == '-nE' .or. trim(token) == '-En') then |
| 799 | suppress_newline = .true. |
| 800 | interpret_escapes = .false. |
| 801 | start_token = i + 1 |
| 802 | else |
| 803 | ! Not a recognized option, treat as regular argument |
| 804 | exit |
| 805 | end if |
| 806 | end do |
| 807 | |
| 808 | ! Fast path: when not interpreting escapes, build output in a single buffer |
| 809 | ! and write once to avoid per-token syscall overhead |
| 810 | if (.not. interpret_escapes) then |
| 811 | block |
| 812 | character(len=:), allocatable :: out_buf |
| 813 | integer :: out_pos, out_cap, tlen |
| 814 | |
| 815 | ! Estimate total output size |
| 816 | out_cap = 0 |
| 817 | do i = start_token, cmd%num_tokens |
| 818 | if (allocated(cmd%token_lengths) .and. i <= size(cmd%token_lengths) .and. & |
| 819 | cmd%token_lengths(i) > 0) then |
| 820 | out_cap = out_cap + cmd%token_lengths(i) + 1 |
| 821 | else |
| 822 | out_cap = out_cap + len_trim(cmd%tokens(i)) + 1 |
| 823 | end if |
| 824 | end do |
| 825 | if (.not. suppress_newline) out_cap = out_cap + 1 |
| 826 | |
| 827 | allocate(character(len=max(out_cap, 1)) :: out_buf) |
| 828 | out_pos = 1 |
| 829 | first = .true. |
| 830 | |
| 831 | do i = start_token, cmd%num_tokens |
| 832 | ! Skip empty unquoted tokens |
| 833 | if (len_trim(cmd%tokens(i)) == 0) then |
| 834 | if (allocated(cmd%token_quoted)) then |
| 835 | if (.not. (i <= size(cmd%token_quoted) .and. cmd%token_quoted(i))) cycle |
| 836 | else |
| 837 | cycle |
| 838 | end if |
| 839 | end if |
| 840 | |
| 841 | if (.not. first) then |
| 842 | out_buf(out_pos:out_pos) = ' ' |
| 843 | out_pos = out_pos + 1 |
| 844 | end if |
| 845 | |
| 846 | if (allocated(cmd%token_lengths) .and. i <= size(cmd%token_lengths) .and. & |
| 847 | cmd%token_lengths(i) > 0) then |
| 848 | tlen = cmd%token_lengths(i) |
| 849 | else |
| 850 | tlen = len_trim(cmd%tokens(i)) |
| 851 | end if |
| 852 | |
| 853 | if (tlen > 0) then |
| 854 | out_buf(out_pos:out_pos+tlen-1) = cmd%tokens(i)(1:tlen) |
| 855 | out_pos = out_pos + tlen |
| 856 | end if |
| 857 | first = .false. |
| 858 | end do |
| 859 | |
| 860 | if (.not. suppress_newline) then |
| 861 | out_buf(out_pos:out_pos) = new_line('a') |
| 862 | out_pos = out_pos + 1 |
| 863 | end if |
| 864 | |
| 865 | if (out_pos > 1) then |
| 866 | call write_stdout_nonl_checked(out_buf(1:out_pos-1), write_ok) |
| 867 | if (.not. write_ok) had_error = .true. |
| 868 | else if (.not. suppress_newline) then |
| 869 | call write_stdout_checked('', write_ok) |
| 870 | if (.not. write_ok) had_error = .true. |
| 871 | end if |
| 872 | end block |
| 873 | else |
| 874 | ! Escape-interpreting path (less common) |
| 875 | do i = start_token, cmd%num_tokens |
| 876 | if (len_trim(cmd%tokens(i)) == 0) then |
| 877 | if (allocated(cmd%token_quoted)) then |
| 878 | if (i <= size(cmd%token_quoted) .and. cmd%token_quoted(i)) then |
| 879 | ! Token was quoted - keep it as empty argument |
| 880 | else |
| 881 | cycle |
| 882 | end if |
| 883 | else |
| 884 | cycle |
| 885 | end if |
| 886 | end if |
| 887 | |
| 888 | if (.not. first) then |
| 889 | call write_stdout_nonl_checked(' ', write_ok) |
| 890 | if (.not. write_ok) had_error = .true. |
| 891 | end if |
| 892 | |
| 893 | token = cmd%tokens(i) |
| 894 | if (allocated(cmd%token_lengths) .and. i <= size(cmd%token_lengths) .and. & |
| 895 | cmd%token_lengths(i) > 0) then |
| 896 | len_token = cmd%token_lengths(i) |
| 897 | else |
| 898 | len_token = len_trim(token) |
| 899 | end if |
| 900 | |
| 901 | processed = '' |
| 902 | j = 1 |
| 903 | |
| 904 | do while (j <= len_token) |
| 905 | if (token(j:j) == '\' .and. j < len_token) then |
| 906 | j = j + 1 |
| 907 | select case (token(j:j)) |
| 908 | case ('a') |
| 909 | processed = processed // achar(7) |
| 910 | case ('b') |
| 911 | processed = processed // achar(8) |
| 912 | case ('c') |
| 913 | suppress_newline = .true. |
| 914 | stop_output = .true. |
| 915 | exit |
| 916 | case ('f') |
| 917 | processed = processed // achar(12) |
| 918 | case ('n') |
| 919 | processed = processed // new_line('a') |
| 920 | case ('r') |
| 921 | processed = processed // achar(13) |
| 922 | case ('t') |
| 923 | processed = processed // achar(9) |
| 924 | case ('v') |
| 925 | processed = processed // achar(11) |
| 926 | case ('\') |
| 927 | processed = processed // '\' |
| 928 | case ('0') |
| 929 | block |
| 930 | integer :: oval, nd |
| 931 | oval = 0 |
| 932 | nd = 0 |
| 933 | do while (nd < 3 .and. j + nd + 1 <= len_token) |
| 934 | if (token(j+nd+1:j+nd+1) >= '0' .and. token(j+nd+1:j+nd+1) <= '7') then |
| 935 | oval = oval * 8 + ichar(token(j+nd+1:j+nd+1)) - ichar('0') |
| 936 | nd = nd + 1 |
| 937 | else |
| 938 | exit |
| 939 | end if |
| 940 | end do |
| 941 | if (oval >= 0 .and. oval <= 127) then |
| 942 | processed = processed // achar(oval) |
| 943 | else |
| 944 | processed = processed // achar(mod(oval, 256)) |
| 945 | end if |
| 946 | j = j + nd |
| 947 | end block |
| 948 | case ('x') |
| 949 | block |
| 950 | integer :: hval, hd, hc |
| 951 | hval = 0 |
| 952 | hd = 0 |
| 953 | do while (hd < 2 .and. j + hd + 1 <= len_token) |
| 954 | hc = ichar(token(j+hd+1:j+hd+1)) |
| 955 | if (hc >= ichar('0') .and. hc <= ichar('9')) then |
| 956 | hval = hval * 16 + hc - ichar('0') |
| 957 | hd = hd + 1 |
| 958 | else if (hc >= ichar('a') .and. hc <= ichar('f')) then |
| 959 | hval = hval * 16 + hc - ichar('a') + 10 |
| 960 | hd = hd + 1 |
| 961 | else if (hc >= ichar('A') .and. hc <= ichar('F')) then |
| 962 | hval = hval * 16 + hc - ichar('A') + 10 |
| 963 | hd = hd + 1 |
| 964 | else |
| 965 | exit |
| 966 | end if |
| 967 | end do |
| 968 | if (hd > 0) then |
| 969 | processed = processed // achar(mod(hval, 256)) |
| 970 | j = j + hd |
| 971 | else |
| 972 | processed = processed // '\x' |
| 973 | end if |
| 974 | end block |
| 975 | case default |
| 976 | processed = processed // '\' // token(j:j) |
| 977 | end select |
| 978 | j = j + 1 |
| 979 | else |
| 980 | processed = processed // token(j:j) |
| 981 | j = j + 1 |
| 982 | end if |
| 983 | end do |
| 984 | |
| 985 | call write_stdout_nonl_checked(processed, write_ok) |
| 986 | if (.not. write_ok) had_error = .true. |
| 987 | first = .false. |
| 988 | |
| 989 | if (stop_output) exit |
| 990 | end do |
| 991 | |
| 992 | if (.not. suppress_newline) then |
| 993 | call write_stdout_checked('', write_ok) |
| 994 | if (.not. write_ok) had_error = .true. |
| 995 | end if |
| 996 | end if |
| 997 | |
| 998 | if (had_error) then |
| 999 | call write_stderr('fortsh: echo: write error: Bad file descriptor') |
| 1000 | shell%last_exit_status = 1 |
| 1001 | else |
| 1002 | shell%last_exit_status = 0 |
| 1003 | end if |
| 1004 | end subroutine |
| 1005 | |
| 1006 | subroutine builtin_jobs(cmd, shell) |
| 1007 | type(command_t), intent(in) :: cmd |
| 1008 | type(shell_state_t), intent(inout) :: shell |
| 1009 | logical :: show_pids |
| 1010 | |
| 1011 | ! Check for -p flag to show PIDs |
| 1012 | show_pids = .false. |
| 1013 | if (cmd%num_tokens > 1 .and. trim(cmd%tokens(2)) == '-p') then |
| 1014 | show_pids = .true. |
| 1015 | end if |
| 1016 | |
| 1017 | call update_job_status(shell) |
| 1018 | call list_jobs(shell, show_pids) |
| 1019 | shell%last_exit_status = 0 |
| 1020 | end subroutine |
| 1021 | |
| 1022 | ! Parse job specification and return job_id |
| 1023 | ! Supports: %n, %%, %+, %-, %?string |
| 1024 | ! Returns 0 if no match found |
| 1025 | function parse_job_spec(shell, spec) result(job_id) |
| 1026 | type(shell_state_t), intent(in) :: shell |
| 1027 | character(len=*), intent(in) :: spec |
| 1028 | integer :: job_id |
| 1029 | character(len=256) :: search_str |
| 1030 | integer :: iostat, i |
| 1031 | |
| 1032 | job_id = 0 |
| 1033 | |
| 1034 | if (len_trim(spec) == 0) then |
| 1035 | ! Empty spec - use current job |
| 1036 | job_id = shell%current_job_id |
| 1037 | return |
| 1038 | end if |
| 1039 | |
| 1040 | ! Remove leading % if present |
| 1041 | if (spec(1:1) == '%') then |
| 1042 | if (len_trim(spec) == 1) then |
| 1043 | ! Just "%" - current job |
| 1044 | job_id = shell%current_job_id |
| 1045 | return |
| 1046 | end if |
| 1047 | |
| 1048 | select case (spec(2:2)) |
| 1049 | case ('+') |
| 1050 | ! %+ - current job |
| 1051 | job_id = shell%current_job_id |
| 1052 | case ('-') |
| 1053 | ! %- - previous job |
| 1054 | job_id = shell%previous_job_id |
| 1055 | case ('%') |
| 1056 | ! %% - current job |
| 1057 | job_id = shell%current_job_id |
| 1058 | case ('?') |
| 1059 | ! %?string - search for string in command |
| 1060 | search_str = trim(spec(3:)) |
| 1061 | do i = 1, MAX_JOBS |
| 1062 | if (shell%jobs(i)%job_id > 0) then |
| 1063 | if (index(shell%jobs(i)%command_line, trim(search_str)) > 0) then |
| 1064 | job_id = shell%jobs(i)%job_id |
| 1065 | return |
| 1066 | end if |
| 1067 | end if |
| 1068 | end do |
| 1069 | case default |
| 1070 | ! %n - job number |
| 1071 | read(spec(2:), *, iostat=iostat) job_id |
| 1072 | if (iostat /= 0) then |
| 1073 | job_id = 0 |
| 1074 | end if |
| 1075 | end select |
| 1076 | else |
| 1077 | ! No % prefix - try to parse as number |
| 1078 | read(spec, *, iostat=iostat) job_id |
| 1079 | if (iostat /= 0) then |
| 1080 | job_id = 0 |
| 1081 | end if |
| 1082 | end if |
| 1083 | end function parse_job_spec |
| 1084 | |
| 1085 | subroutine builtin_fg(cmd, shell) |
| 1086 | type(command_t), intent(in) :: cmd |
| 1087 | type(shell_state_t), intent(inout) :: shell |
| 1088 | integer :: job_id, i |
| 1089 | |
| 1090 | if (cmd%num_tokens < 2) then |
| 1091 | ! Use current job, or fall back to most recent stopped job |
| 1092 | job_id = shell%current_job_id |
| 1093 | if (job_id == 0) then |
| 1094 | do i = MAX_JOBS, 1, -1 |
| 1095 | if (shell%jobs(i)%job_id > 0 .and. shell%jobs(i)%state == JOB_STOPPED) then |
| 1096 | job_id = shell%jobs(i)%job_id |
| 1097 | exit |
| 1098 | end if |
| 1099 | end do |
| 1100 | end if |
| 1101 | |
| 1102 | if (job_id == 0) then |
| 1103 | write(error_unit, '(a)') 'fg: no current job' |
| 1104 | shell%last_exit_status = 1 |
| 1105 | return |
| 1106 | end if |
| 1107 | else |
| 1108 | ! Parse job spec (%n, %%, %+, %-, %?string) |
| 1109 | job_id = parse_job_spec(shell, cmd%tokens(2)) |
| 1110 | |
| 1111 | if (job_id == 0) then |
| 1112 | write(error_unit, '(a)') 'fg: no such job' |
| 1113 | shell%last_exit_status = 1 |
| 1114 | return |
| 1115 | end if |
| 1116 | end if |
| 1117 | |
| 1118 | call resume_job_fg(shell, job_id) |
| 1119 | end subroutine |
| 1120 | |
| 1121 | subroutine builtin_bg(cmd, shell) |
| 1122 | type(command_t), intent(in) :: cmd |
| 1123 | type(shell_state_t), intent(inout) :: shell |
| 1124 | integer :: job_id, i |
| 1125 | |
| 1126 | if (cmd%num_tokens < 2) then |
| 1127 | ! Use current job, or fall back to most recent stopped job |
| 1128 | job_id = shell%current_job_id |
| 1129 | if (job_id == 0) then |
| 1130 | do i = MAX_JOBS, 1, -1 |
| 1131 | if (shell%jobs(i)%job_id > 0 .and. & |
| 1132 | shell%jobs(i)%state == JOB_STOPPED) then |
| 1133 | job_id = shell%jobs(i)%job_id |
| 1134 | exit |
| 1135 | end if |
| 1136 | end do |
| 1137 | end if |
| 1138 | |
| 1139 | if (job_id == 0) then |
| 1140 | write(error_unit, '(a)') 'bg: no current job' |
| 1141 | shell%last_exit_status = 1 |
| 1142 | return |
| 1143 | end if |
| 1144 | else |
| 1145 | ! Parse job spec (%n, %%, %+, %-, %?string) |
| 1146 | job_id = parse_job_spec(shell, cmd%tokens(2)) |
| 1147 | |
| 1148 | if (job_id == 0) then |
| 1149 | write(error_unit, '(a)') 'bg: no such job' |
| 1150 | shell%last_exit_status = 1 |
| 1151 | return |
| 1152 | end if |
| 1153 | end if |
| 1154 | |
| 1155 | call resume_job_bg(shell, job_id) |
| 1156 | end subroutine |
| 1157 | |
| 1158 | subroutine builtin_disown(cmd, shell) |
| 1159 | use job_control, only: remove_job |
| 1160 | type(command_t), intent(in) :: cmd |
| 1161 | type(shell_state_t), intent(inout) :: shell |
| 1162 | integer :: job_id, i |
| 1163 | |
| 1164 | if (cmd%num_tokens < 2) then |
| 1165 | ! Disown current job |
| 1166 | job_id = shell%current_job_id |
| 1167 | if (job_id == 0) then |
| 1168 | ! Find most recent job |
| 1169 | do i = MAX_JOBS, 1, -1 |
| 1170 | if (shell%jobs(i)%job_id > 0) then |
| 1171 | job_id = shell%jobs(i)%job_id |
| 1172 | exit |
| 1173 | end if |
| 1174 | end do |
| 1175 | end if |
| 1176 | else |
| 1177 | ! Parse job spec |
| 1178 | job_id = parse_job_spec(shell, cmd%tokens(2)) |
| 1179 | end if |
| 1180 | |
| 1181 | if (job_id == 0) then |
| 1182 | write(error_unit, '(a)') 'disown: no current job' |
| 1183 | shell%last_exit_status = 1 |
| 1184 | return |
| 1185 | end if |
| 1186 | |
| 1187 | call remove_job(shell, job_id) |
| 1188 | shell%last_exit_status = 0 |
| 1189 | end subroutine |
| 1190 | |
| 1191 | subroutine builtin_source(cmd, shell) |
| 1192 | use variables, only: get_shell_variable |
| 1193 | type(command_t), intent(in) :: cmd |
| 1194 | type(shell_state_t), intent(inout) :: shell |
| 1195 | |
| 1196 | character(len=:), allocatable :: filename, path_var, dir, candidate |
| 1197 | character(len=:), allocatable :: path_str |
| 1198 | logical :: file_exists, found_in_path |
| 1199 | integer :: i, path_start, path_end, path_len |
| 1200 | |
| 1201 | ! Check if filename provided |
| 1202 | if (cmd%num_tokens < 2) then |
| 1203 | write(error_unit, '(a)') 'source: usage: source filename [arguments...]' |
| 1204 | shell%last_exit_status = 1 |
| 1205 | return |
| 1206 | end if |
| 1207 | |
| 1208 | filename = trim(cmd%tokens(2)) |
| 1209 | |
| 1210 | ! POSIX: If filename doesn't contain '/', search PATH |
| 1211 | if (index(filename, '/') == 0) then |
| 1212 | ! Get PATH variable |
| 1213 | path_str = get_shell_variable(shell, 'PATH') |
| 1214 | if (allocated(path_str)) then |
| 1215 | path_var = path_str |
| 1216 | else |
| 1217 | path_var = '' |
| 1218 | end if |
| 1219 | path_len = len_trim(path_var) |
| 1220 | |
| 1221 | found_in_path = .false. |
| 1222 | path_start = 1 |
| 1223 | |
| 1224 | ! Search each directory in PATH |
| 1225 | do while (path_start <= path_len .and. .not. found_in_path) |
| 1226 | ! Find next colon or end of string |
| 1227 | path_end = index(path_var(path_start:), ':') |
| 1228 | if (path_end == 0) then |
| 1229 | path_end = path_len + 1 |
| 1230 | else |
| 1231 | path_end = path_start + path_end - 1 |
| 1232 | end if |
| 1233 | |
| 1234 | ! Extract directory |
| 1235 | if (path_end > path_start) then |
| 1236 | dir = trim(path_var(path_start:path_end-1)) |
| 1237 | ! Build candidate path |
| 1238 | if (len_trim(dir) > 0) then |
| 1239 | candidate = trim(dir) // '/' // trim(filename) |
| 1240 | else |
| 1241 | ! Empty PATH component means current directory |
| 1242 | candidate = trim(filename) |
| 1243 | end if |
| 1244 | |
| 1245 | ! Check if candidate exists |
| 1246 | inquire(file=candidate, exist=file_exists) |
| 1247 | if (file_exists) then |
| 1248 | filename = candidate |
| 1249 | found_in_path = .true. |
| 1250 | end if |
| 1251 | end if |
| 1252 | |
| 1253 | ! Move to next PATH component |
| 1254 | path_start = path_end + 1 |
| 1255 | end do |
| 1256 | |
| 1257 | ! If not found in PATH, try current directory as fallback |
| 1258 | if (.not. found_in_path) then |
| 1259 | inquire(file=filename, exist=file_exists) |
| 1260 | if (.not. file_exists) then |
| 1261 | write(error_unit, '(a)') 'source: ' // trim(cmd%tokens(2)) // ': No such file or directory' |
| 1262 | shell%last_exit_status = 1 |
| 1263 | return |
| 1264 | end if |
| 1265 | end if |
| 1266 | else |
| 1267 | ! Contains '/' - use as-is, no PATH search |
| 1268 | inquire(file=filename, exist=file_exists) |
| 1269 | if (.not. file_exists) then |
| 1270 | write(error_unit, '(a)') 'source: ' // trim(filename) // ': No such file or directory' |
| 1271 | shell%last_exit_status = 1 |
| 1272 | return |
| 1273 | end if |
| 1274 | end if |
| 1275 | |
| 1276 | ! Set positional parameters from remaining arguments |
| 1277 | ! Save $0 (script name) |
| 1278 | shell%shell_name = trim(filename) |
| 1279 | |
| 1280 | ! Set $1, $2, ... from arguments |
| 1281 | shell%num_positional = 0 |
| 1282 | if (cmd%num_tokens > 2) then |
| 1283 | ! Allocate positional_params if not already allocated |
| 1284 | if (.not. allocated(shell%positional_params)) then |
| 1285 | allocate(shell%positional_params(50)) ! Default size |
| 1286 | block |
| 1287 | integer :: k |
| 1288 | do k = 1, 50 |
| 1289 | shell%positional_params(k)%str = '' |
| 1290 | end do |
| 1291 | end block |
| 1292 | end if |
| 1293 | |
| 1294 | do i = 3, cmd%num_tokens |
| 1295 | shell%num_positional = shell%num_positional + 1 |
| 1296 | if (shell%num_positional <= size(shell%positional_params)) then |
| 1297 | shell%positional_params(shell%num_positional)%str = trim(cmd%tokens(i)) |
| 1298 | end if |
| 1299 | end do |
| 1300 | end if |
| 1301 | |
| 1302 | ! Mark the shell to source this file on next main loop iteration |
| 1303 | ! This avoids circular dependency issues |
| 1304 | shell%source_file = filename |
| 1305 | shell%should_source = .true. |
| 1306 | ! Don't set exit status here - will be set by the sourced file execution |
| 1307 | end subroutine |
| 1308 | |
| 1309 | subroutine builtin_history(cmd, shell) |
| 1310 | type(command_t), intent(in) :: cmd |
| 1311 | type(shell_state_t), intent(inout) :: shell |
| 1312 | integer :: i, n, offset, iostat, history_start_index |
| 1313 | character(len=256) :: arg |
| 1314 | |
| 1315 | ! Handle history command options |
| 1316 | if (cmd%num_tokens > 1) then |
| 1317 | arg = trim(cmd%tokens(2)) |
| 1318 | |
| 1319 | select case(arg) |
| 1320 | case('-c', '--clear') |
| 1321 | ! Clear history (silent like bash) |
| 1322 | call clear_history() |
| 1323 | shell%last_exit_status = 0 |
| 1324 | return |
| 1325 | |
| 1326 | case('-d') |
| 1327 | ! Delete history entry at offset |
| 1328 | if (cmd%num_tokens < 3) then |
| 1329 | write(error_unit, '(a)') 'history: -d requires an argument' |
| 1330 | shell%last_exit_status = 1 |
| 1331 | return |
| 1332 | end if |
| 1333 | |
| 1334 | read(cmd%tokens(3), *, iostat=iostat) offset |
| 1335 | if (iostat /= 0 .or. offset < 1) then |
| 1336 | write(error_unit, '(a)') 'history: -d: invalid offset' |
| 1337 | shell%last_exit_status = 1 |
| 1338 | return |
| 1339 | end if |
| 1340 | |
| 1341 | call delete_history_entry(offset) |
| 1342 | shell%last_exit_status = 0 |
| 1343 | return |
| 1344 | |
| 1345 | case('-a') |
| 1346 | ! Append new history lines to history file |
| 1347 | if (len_trim(shell%histfile) == 0) then |
| 1348 | write(error_unit, '(a)') 'history: HISTFILE not set' |
| 1349 | shell%last_exit_status = 1 |
| 1350 | return |
| 1351 | end if |
| 1352 | |
| 1353 | ! We'll append all history for simplicity (could track last saved index) |
| 1354 | call save_history_to_file(trim(shell%histfile), shell%histfilesize) |
| 1355 | shell%last_exit_status = 0 |
| 1356 | return |
| 1357 | |
| 1358 | case('-r') |
| 1359 | ! Read history file and append to current history |
| 1360 | if (len_trim(shell%histfile) == 0) then |
| 1361 | write(error_unit, '(a)') 'history: HISTFILE not set' |
| 1362 | shell%last_exit_status = 1 |
| 1363 | return |
| 1364 | end if |
| 1365 | |
| 1366 | call load_history_from_file(trim(shell%histfile), shell%histsize) |
| 1367 | shell%last_exit_status = 0 |
| 1368 | return |
| 1369 | |
| 1370 | case('-w') |
| 1371 | ! Write current history to history file |
| 1372 | if (len_trim(shell%histfile) == 0) then |
| 1373 | write(error_unit, '(a)') 'history: HISTFILE not set' |
| 1374 | shell%last_exit_status = 1 |
| 1375 | return |
| 1376 | end if |
| 1377 | |
| 1378 | call save_history_to_file(trim(shell%histfile), shell%histfilesize) |
| 1379 | shell%last_exit_status = 0 |
| 1380 | return |
| 1381 | |
| 1382 | case default |
| 1383 | ! Try to parse as number (show last n commands) |
| 1384 | read(arg, *, iostat=iostat) n |
| 1385 | if (iostat /= 0) then |
| 1386 | write(error_unit, '(a)') 'history: unknown option: ' // trim(arg) |
| 1387 | shell%last_exit_status = 1 |
| 1388 | return |
| 1389 | end if |
| 1390 | |
| 1391 | ! Show last n commands |
| 1392 | history_start_index = max(1, get_history_count() - n + 1) |
| 1393 | do i = history_start_index, get_history_count() |
| 1394 | write(output_unit, '(i4,2x,a)') i, trim(command_history%lines(i)) |
| 1395 | end do |
| 1396 | shell%last_exit_status = 0 |
| 1397 | return |
| 1398 | end select |
| 1399 | else |
| 1400 | ! Show all history |
| 1401 | call show_history() |
| 1402 | shell%last_exit_status = 0 |
| 1403 | end if |
| 1404 | end subroutine |
| 1405 | |
| 1406 | subroutine builtin_kill(cmd, shell) |
| 1407 | type(command_t), intent(in) :: cmd |
| 1408 | type(shell_state_t), intent(inout) :: shell |
| 1409 | integer :: signal_num, target_pid, iostat, ret |
| 1410 | integer :: i, arg_start |
| 1411 | logical :: found_signal |
| 1412 | |
| 1413 | signal_num = 15 ! Default: SIGTERM |
| 1414 | arg_start = 2 |
| 1415 | found_signal = .false. |
| 1416 | |
| 1417 | if (cmd%num_tokens < 2) then |
| 1418 | write(error_unit, '(a)') 'kill: usage: kill [-signal] pid...' |
| 1419 | shell%last_exit_status = 1 |
| 1420 | return |
| 1421 | end if |
| 1422 | |
| 1423 | ! Check if first argument is a signal specifier or -l flag |
| 1424 | if (cmd%tokens(2)(1:1) == '-') then |
| 1425 | if (len_trim(cmd%tokens(2)) > 1) then |
| 1426 | ! Check for -s flag (signal name as next arg) |
| 1427 | if (trim(cmd%tokens(2)) == '-s') then |
| 1428 | if (cmd%num_tokens < 3) then |
| 1429 | write(error_unit, '(a)') & |
| 1430 | 'kill: -s requires an argument' |
| 1431 | shell%last_exit_status = 1 |
| 1432 | return |
| 1433 | end if |
| 1434 | ! Parse signal name from next argument |
| 1435 | block |
| 1436 | character(len=256) :: sig_name |
| 1437 | sig_name = trim(cmd%tokens(3)) |
| 1438 | select case(sig_name) |
| 1439 | case('TERM', 'term', 'SIGTERM') |
| 1440 | signal_num = 15 |
| 1441 | case('KILL', 'kill', 'SIGKILL') |
| 1442 | signal_num = 9 |
| 1443 | case('INT', 'int', 'SIGINT') |
| 1444 | signal_num = 2 |
| 1445 | case('STOP', 'stop', 'SIGSTOP') |
| 1446 | #ifdef __APPLE__ |
| 1447 | signal_num = 18 |
| 1448 | #else |
| 1449 | signal_num = 20 |
| 1450 | #endif |
| 1451 | case('CONT', 'cont', 'SIGCONT') |
| 1452 | #ifdef __APPLE__ |
| 1453 | signal_num = 19 |
| 1454 | #else |
| 1455 | signal_num = 18 |
| 1456 | #endif |
| 1457 | case('HUP', 'hup', 'SIGHUP') |
| 1458 | signal_num = 1 |
| 1459 | case('QUIT', 'quit', 'SIGQUIT') |
| 1460 | signal_num = 3 |
| 1461 | case('USR1', 'usr1', 'SIGUSR1') |
| 1462 | signal_num = 10 |
| 1463 | case('USR2', 'usr2', 'SIGUSR2') |
| 1464 | signal_num = 12 |
| 1465 | case default |
| 1466 | read(sig_name, *, iostat=iostat) signal_num |
| 1467 | if (iostat /= 0) then |
| 1468 | write(error_unit, '(a)') & |
| 1469 | 'kill: invalid signal: ' // & |
| 1470 | trim(sig_name) |
| 1471 | shell%last_exit_status = 1 |
| 1472 | return |
| 1473 | end if |
| 1474 | end select |
| 1475 | end block |
| 1476 | found_signal = .true. |
| 1477 | arg_start = 4 |
| 1478 | ! Check for -l flag (list signals) |
| 1479 | else if (trim(cmd%tokens(2)) == '-l') then |
| 1480 | ! Check if there's a signal number argument |
| 1481 | if (cmd%num_tokens >= 3) then |
| 1482 | ! kill -l <num> - translate signal number to name |
| 1483 | read(cmd%tokens(3), *, iostat=iostat) signal_num |
| 1484 | if (iostat == 0) then |
| 1485 | select case(signal_num) |
| 1486 | case(1); write(output_unit, '(a)') 'HUP' |
| 1487 | case(2); write(output_unit, '(a)') 'INT' |
| 1488 | case(3); write(output_unit, '(a)') 'QUIT' |
| 1489 | case(4); write(output_unit, '(a)') 'ILL' |
| 1490 | case(5); write(output_unit, '(a)') 'TRAP' |
| 1491 | case(6); write(output_unit, '(a)') 'ABRT' |
| 1492 | case(7); write(output_unit, '(a)') 'BUS' |
| 1493 | case(8); write(output_unit, '(a)') 'FPE' |
| 1494 | case(9); write(output_unit, '(a)') 'KILL' |
| 1495 | case(10); write(output_unit, '(a)') 'USR1' |
| 1496 | case(11); write(output_unit, '(a)') 'SEGV' |
| 1497 | case(12); write(output_unit, '(a)') 'USR2' |
| 1498 | case(13); write(output_unit, '(a)') 'PIPE' |
| 1499 | case(14); write(output_unit, '(a)') 'ALRM' |
| 1500 | case(15); write(output_unit, '(a)') 'TERM' |
| 1501 | case(16); write(output_unit, '(a)') 'STKFLT' |
| 1502 | case(17); write(output_unit, '(a)') 'CHLD' |
| 1503 | case(18); write(output_unit, '(a)') 'CONT' |
| 1504 | case(19); write(output_unit, '(a)') 'STOP' |
| 1505 | case(20); write(output_unit, '(a)') 'TSTP' |
| 1506 | case(21); write(output_unit, '(a)') 'TTIN' |
| 1507 | case(22); write(output_unit, '(a)') 'TTOU' |
| 1508 | case default |
| 1509 | write(error_unit, '(a,i0)') 'kill: invalid signal number: ', signal_num |
| 1510 | shell%last_exit_status = 1 |
| 1511 | return |
| 1512 | end select |
| 1513 | shell%last_exit_status = 0 |
| 1514 | return |
| 1515 | end if |
| 1516 | end if |
| 1517 | ! No argument or invalid - list all signals |
| 1518 | write(output_unit, '(a)') 'Available signals:' |
| 1519 | write(output_unit, '(a)') ' 1) SIGHUP 2) SIGINT 3) SIGQUIT 4) SIGILL' |
| 1520 | write(output_unit, '(a)') ' 5) SIGTRAP 6) SIGABRT 7) SIGBUS 8) SIGFPE' |
| 1521 | write(output_unit, '(a)') ' 9) SIGKILL 10) SIGUSR1 11) SIGSEGV 12) SIGUSR2' |
| 1522 | write(output_unit, '(a)') ' 13) SIGPIPE 14) SIGALRM 15) SIGTERM 16) SIGSTKFLT' |
| 1523 | write(output_unit, '(a)') ' 17) SIGCHLD 18) SIGCONT 19) SIGSTOP 20) SIGTSTP' |
| 1524 | write(output_unit, '(a)') ' 21) SIGTTIN 22) SIGTTOU' |
| 1525 | shell%last_exit_status = 0 |
| 1526 | return |
| 1527 | end if |
| 1528 | |
| 1529 | if (.not. found_signal) then |
| 1530 | read(cmd%tokens(2)(2:), *, iostat=iostat) signal_num |
| 1531 | if (iostat /= 0) then |
| 1532 | ! Try named signals |
| 1533 | select case(trim(cmd%tokens(2)(2:))) |
| 1534 | case('HUP', 'hup', 'SIGHUP') |
| 1535 | signal_num = 1 |
| 1536 | case('INT', 'int', 'SIGINT') |
| 1537 | signal_num = 2 |
| 1538 | case('QUIT', 'quit', 'SIGQUIT') |
| 1539 | signal_num = 3 |
| 1540 | case('ILL', 'ill', 'SIGILL') |
| 1541 | signal_num = 4 |
| 1542 | case('TRAP', 'trap', 'SIGTRAP') |
| 1543 | signal_num = 5 |
| 1544 | case('ABRT', 'abrt', 'SIGABRT') |
| 1545 | signal_num = 6 |
| 1546 | case('BUS', 'bus', 'SIGBUS') |
| 1547 | signal_num = 7 |
| 1548 | case('FPE', 'fpe', 'SIGFPE') |
| 1549 | signal_num = 8 |
| 1550 | case('KILL', 'kill', 'SIGKILL') |
| 1551 | signal_num = 9 |
| 1552 | case('USR1', 'usr1', 'SIGUSR1') |
| 1553 | signal_num = 10 |
| 1554 | case('SEGV', 'segv', 'SIGSEGV') |
| 1555 | signal_num = 11 |
| 1556 | case('USR2', 'usr2', 'SIGUSR2') |
| 1557 | signal_num = 12 |
| 1558 | case('PIPE', 'pipe', 'SIGPIPE') |
| 1559 | signal_num = 13 |
| 1560 | case('ALRM', 'alrm', 'SIGALRM') |
| 1561 | signal_num = 14 |
| 1562 | case('TERM', 'term', 'SIGTERM') |
| 1563 | signal_num = 15 |
| 1564 | case('STKFLT', 'stkflt', 'SIGSTKFLT') |
| 1565 | signal_num = 16 |
| 1566 | case('CHLD', 'chld', 'SIGCHLD') |
| 1567 | #ifdef __APPLE__ |
| 1568 | signal_num = 20 |
| 1569 | #else |
| 1570 | signal_num = 17 |
| 1571 | #endif |
| 1572 | case('CONT', 'cont', 'SIGCONT') |
| 1573 | #ifdef __APPLE__ |
| 1574 | signal_num = 19 |
| 1575 | #else |
| 1576 | signal_num = 18 |
| 1577 | #endif |
| 1578 | case('STOP', 'stop', 'SIGSTOP') |
| 1579 | #ifdef __APPLE__ |
| 1580 | signal_num = 18 ! SIGTSTP on macOS |
| 1581 | #else |
| 1582 | signal_num = 20 ! SIGTSTP on Linux |
| 1583 | #endif |
| 1584 | case('TSTP', 'tstp', 'SIGTSTP') |
| 1585 | #ifdef __APPLE__ |
| 1586 | signal_num = 18 ! SIGTSTP on macOS |
| 1587 | #else |
| 1588 | signal_num = 20 ! SIGTSTP on Linux |
| 1589 | #endif |
| 1590 | case('TTIN', 'ttin', 'SIGTTIN') |
| 1591 | signal_num = 21 |
| 1592 | case('TTOU', 'ttou', 'SIGTTOU') |
| 1593 | signal_num = 22 |
| 1594 | case default |
| 1595 | write(error_unit, '(a)') 'kill: invalid signal specification' |
| 1596 | shell%last_exit_status = 1 |
| 1597 | return |
| 1598 | end select |
| 1599 | end if |
| 1600 | found_signal = .true. |
| 1601 | arg_start = 3 |
| 1602 | end if ! .not. found_signal |
| 1603 | end if |
| 1604 | end if |
| 1605 | |
| 1606 | if (cmd%num_tokens < arg_start) then |
| 1607 | write(error_unit, '(a)') 'kill: usage: kill [-signal] pid...' |
| 1608 | shell%last_exit_status = 1 |
| 1609 | return |
| 1610 | end if |
| 1611 | |
| 1612 | ! Kill each specified process |
| 1613 | do i = arg_start, cmd%num_tokens |
| 1614 | ! Handle job syntax (%n) |
| 1615 | if (cmd%tokens(i)(1:1) == '%') then |
| 1616 | read(cmd%tokens(i)(2:), *, iostat=iostat) target_pid |
| 1617 | if (iostat == 0) then |
| 1618 | ! Find job by job_id and get its pgid |
| 1619 | target_pid = find_job_pgid(shell, target_pid) |
| 1620 | if (target_pid <= 0) then |
| 1621 | write(error_unit, '(a)') 'kill: no such job' |
| 1622 | shell%last_exit_status = 1 |
| 1623 | cycle |
| 1624 | end if |
| 1625 | ! In non-interactive mode, processes may not have |
| 1626 | ! their own group; kill PID directly if so |
| 1627 | if (shell%is_interactive) then |
| 1628 | target_pid = -target_pid ! Kill process group |
| 1629 | end if |
| 1630 | else |
| 1631 | write(error_unit, '(a)') 'kill: invalid job specification' |
| 1632 | shell%last_exit_status = 1 |
| 1633 | cycle |
| 1634 | end if |
| 1635 | else |
| 1636 | read(cmd%tokens(i), *, iostat=iostat) target_pid |
| 1637 | if (iostat /= 0) then |
| 1638 | write(error_unit, '(a)') 'kill: invalid pid' |
| 1639 | shell%last_exit_status = 1 |
| 1640 | cycle |
| 1641 | end if |
| 1642 | end if |
| 1643 | |
| 1644 | ret = c_kill(int(target_pid, c_pid_t), int(signal_num, c_int)) |
| 1645 | if (ret /= 0) then |
| 1646 | write(error_unit, '(a,i15)') 'kill: failed to kill process ', target_pid |
| 1647 | shell%last_exit_status = 1 |
| 1648 | else |
| 1649 | ! Update job state when sending SIGCONT to a job |
| 1650 | #ifdef __APPLE__ |
| 1651 | if (signal_num == 19 .and. cmd%tokens(i)(1:1) == '%') then |
| 1652 | #else |
| 1653 | if (signal_num == 18 .and. cmd%tokens(i)(1:1) == '%') then |
| 1654 | #endif |
| 1655 | block |
| 1656 | integer :: jid, ji |
| 1657 | read(cmd%tokens(i)(2:), *, iostat=iostat) jid |
| 1658 | if (iostat == 0) then |
| 1659 | do ji = 1, MAX_JOBS |
| 1660 | if (shell%jobs(ji)%job_id == jid) then |
| 1661 | shell%jobs(ji)%state = JOB_RUNNING |
| 1662 | exit |
| 1663 | end if |
| 1664 | end do |
| 1665 | end if |
| 1666 | end block |
| 1667 | end if |
| 1668 | end if |
| 1669 | end do |
| 1670 | |
| 1671 | if (shell%last_exit_status /= 1) then |
| 1672 | shell%last_exit_status = 0 |
| 1673 | end if |
| 1674 | end subroutine |
| 1675 | |
| 1676 | |
| 1677 | subroutine builtin_wait(cmd, shell) |
| 1678 | type(command_t), intent(in) :: cmd |
| 1679 | type(shell_state_t), intent(inout) :: shell |
| 1680 | integer :: target_pid, iostat, ret |
| 1681 | integer(c_int), target :: wait_status |
| 1682 | integer :: i |
| 1683 | |
| 1684 | if (cmd%num_tokens == 1) then |
| 1685 | ! Wait for all background jobs |
| 1686 | block |
| 1687 | integer :: done_ids(MAX_JOBS), num_done, di |
| 1688 | num_done = 0 |
| 1689 | do i = 1, MAX_JOBS |
| 1690 | if (shell%jobs(i)%job_id > 0 .and. & |
| 1691 | shell%jobs(i)%state == JOB_RUNNING) then |
| 1692 | ret = c_waitpid(shell%jobs(i)%pgid, & |
| 1693 | c_loc(wait_status), 0) |
| 1694 | if (WIFEXITED(wait_status) .or. & |
| 1695 | WIFSIGNALED(wait_status)) then |
| 1696 | num_done = num_done + 1 |
| 1697 | done_ids(num_done) = shell%jobs(i)%job_id |
| 1698 | end if |
| 1699 | end if |
| 1700 | end do |
| 1701 | do di = 1, num_done |
| 1702 | call remove_job(shell, done_ids(di)) |
| 1703 | end do |
| 1704 | end block |
| 1705 | shell%last_exit_status = 0 |
| 1706 | else |
| 1707 | ! Wait for specific job or PID |
| 1708 | do i = 2, cmd%num_tokens |
| 1709 | if (cmd%tokens(i)(1:1) == '%') then |
| 1710 | ! Job syntax |
| 1711 | read(cmd%tokens(i)(2:), *, iostat=iostat) target_pid |
| 1712 | if (iostat == 0) then |
| 1713 | target_pid = find_job_pgid(shell, target_pid) |
| 1714 | else |
| 1715 | write(error_unit, '(a)') 'wait: invalid job specification' |
| 1716 | shell%last_exit_status = 1 |
| 1717 | cycle |
| 1718 | end if |
| 1719 | else |
| 1720 | read(cmd%tokens(i), *, iostat=iostat) target_pid |
| 1721 | if (iostat /= 0) then |
| 1722 | write(error_unit, '(a)') 'wait: invalid pid' |
| 1723 | shell%last_exit_status = 1 |
| 1724 | cycle |
| 1725 | end if |
| 1726 | end if |
| 1727 | |
| 1728 | if (target_pid > 0) then |
| 1729 | ret = c_waitpid(int(target_pid, c_pid_t), c_loc(wait_status), 0) |
| 1730 | if (ret > 0) then |
| 1731 | if (WIFEXITED(wait_status)) then |
| 1732 | shell%last_exit_status = WEXITSTATUS(wait_status) |
| 1733 | else if (WIFSIGNALED(wait_status)) then |
| 1734 | shell%last_exit_status = 128 + WTERMSIG(wait_status) |
| 1735 | else |
| 1736 | shell%last_exit_status = 1 |
| 1737 | end if |
| 1738 | else |
| 1739 | ! PID is not a child of this shell (or doesn't exist) |
| 1740 | write(error_unit, '(a,i0,a)') 'wait: pid ', target_pid, ' not found' |
| 1741 | shell%last_exit_status = 127 |
| 1742 | end if |
| 1743 | end if |
| 1744 | end do |
| 1745 | end if |
| 1746 | end subroutine |
| 1747 | |
| 1748 | subroutine builtin_trap(cmd, shell) |
| 1749 | type(command_t), intent(in) :: cmd |
| 1750 | type(shell_state_t), intent(inout) :: shell |
| 1751 | character(len=:), allocatable :: action |
| 1752 | character(len=256) :: signal_spec |
| 1753 | integer :: i, j, k, signum |
| 1754 | logical :: list_mode, remove_mode |
| 1755 | |
| 1756 | list_mode = .false. |
| 1757 | remove_mode = .false. |
| 1758 | |
| 1759 | ! trap (no arguments) - list all traps |
| 1760 | if (cmd%num_tokens == 1) then |
| 1761 | call list_traps(shell) |
| 1762 | shell%last_exit_status = 0 |
| 1763 | return |
| 1764 | end if |
| 1765 | |
| 1766 | ! trap -l (list signals) |
| 1767 | if (cmd%num_tokens == 2 .and. trim(cmd%tokens(2)) == '-l') then |
| 1768 | call write_stdout('Available signals:') |
| 1769 | call write_stdout(' 1) SIGHUP 2) SIGINT 3) SIGQUIT 4) SIGILL') |
| 1770 | call write_stdout(' 5) SIGTRAP 6) SIGABRT 7) SIGBUS 8) SIGFPE') |
| 1771 | call write_stdout(' 9) SIGKILL 10) SIGUSR1 11) SIGSEGV 12) SIGUSR2') |
| 1772 | call write_stdout(' 13) SIGPIPE 14) SIGALRM 15) SIGTERM 16) SIGSTKFLT') |
| 1773 | call write_stdout(' 17) SIGCHLD 18) SIGCONT 19) SIGSTOP 20) SIGTSTP') |
| 1774 | call write_stdout(' 21) SIGTTIN 22) SIGTTOU') |
| 1775 | call write_stdout('') |
| 1776 | call write_stdout('Special signals:') |
| 1777 | call write_stdout(' 0) EXIT DEBUG ERR RETURN') |
| 1778 | shell%last_exit_status = 0 |
| 1779 | return |
| 1780 | end if |
| 1781 | |
| 1782 | ! trap -p [signal...] (print traps) |
| 1783 | if (trim(cmd%tokens(2)) == '-p') then |
| 1784 | if (cmd%num_tokens == 2) then |
| 1785 | ! Print all traps |
| 1786 | call list_traps(shell) |
| 1787 | else |
| 1788 | ! Print specific traps |
| 1789 | do j = 3, cmd%num_tokens |
| 1790 | signum = signal_name_to_number(trim(cmd%tokens(j))) |
| 1791 | if (signum == -999) then |
| 1792 | write(error_unit, '(a)') 'trap: invalid signal: ' // trim(cmd%tokens(j)) |
| 1793 | shell%last_exit_status = 1 |
| 1794 | return |
| 1795 | end if |
| 1796 | ! Print trap for this signal if it exists |
| 1797 | ! Use num_traps instead of size(traps) so that subshells can clear traps |
| 1798 | do k = 1, shell%num_traps |
| 1799 | if (shell%traps(k)%signal == signum .and. shell%traps(k)%active) then |
| 1800 | write(output_unit, '(a)') 'trap -- ' // "'" // & |
| 1801 | trim(shell%traps(k)%command) // "' " // & |
| 1802 | trim(signal_number_to_name(signum)) |
| 1803 | flush(output_unit) |
| 1804 | exit |
| 1805 | end if |
| 1806 | end do |
| 1807 | end do |
| 1808 | end if |
| 1809 | shell%last_exit_status = 0 |
| 1810 | return |
| 1811 | end if |
| 1812 | |
| 1813 | ! trap action signal [signal...] |
| 1814 | if (cmd%num_tokens < 3) then |
| 1815 | write(error_unit, '(a)') 'trap: usage: trap [-lp] [action signal_spec ...]' |
| 1816 | shell%last_exit_status = 1 |
| 1817 | return |
| 1818 | end if |
| 1819 | |
| 1820 | ! Get action |
| 1821 | action = trim(cmd%tokens(2)) |
| 1822 | |
| 1823 | ! Strip quotes from action if present |
| 1824 | if (len_trim(action) >= 2) then |
| 1825 | if (action(1:1) == '"' .and. action(len_trim(action):len_trim(action)) == '"') then |
| 1826 | action = action(2:len_trim(action)-1) |
| 1827 | else if (action(1:1) == "'" .and. action(len_trim(action):len_trim(action)) == "'") then |
| 1828 | action = action(2:len_trim(action)-1) |
| 1829 | end if |
| 1830 | end if |
| 1831 | |
| 1832 | ! Check for removal syntax: trap - signal |
| 1833 | ! Note: trap "" signal (empty action) means ignore the signal, not remove the trap |
| 1834 | if (trim(action) == '-') then |
| 1835 | remove_mode = .true. |
| 1836 | end if |
| 1837 | |
| 1838 | ! Process each signal |
| 1839 | do i = 3, cmd%num_tokens |
| 1840 | signal_spec = trim(cmd%tokens(i)) |
| 1841 | |
| 1842 | ! Convert signal name/number to signal number |
| 1843 | signum = signal_name_to_number(signal_spec) |
| 1844 | |
| 1845 | if (signum == -999) then |
| 1846 | write(error_unit, '(a)') 'trap: invalid signal specification: ' // trim(signal_spec) |
| 1847 | shell%last_exit_status = 1 |
| 1848 | cycle |
| 1849 | end if |
| 1850 | |
| 1851 | ! Check if signal is trappable |
| 1852 | if (.not. is_trappable_signal(signum) .and. signum > 0) then |
| 1853 | write(error_unit, '(a)') 'trap: ' // trim(signal_spec) // ': cannot trap signal' |
| 1854 | shell%last_exit_status = 1 |
| 1855 | cycle |
| 1856 | end if |
| 1857 | |
| 1858 | if (remove_mode) then |
| 1859 | ! Remove trap |
| 1860 | call remove_signal_trap(shell, signum) |
| 1861 | else |
| 1862 | ! Set trap |
| 1863 | call set_signal_trap(shell, signum, action) |
| 1864 | end if |
| 1865 | end do |
| 1866 | |
| 1867 | shell%last_exit_status = 0 |
| 1868 | end subroutine |
| 1869 | |
| 1870 | subroutine builtin_config(cmd, shell) |
| 1871 | type(command_t), intent(in) :: cmd |
| 1872 | type(shell_state_t), intent(inout) :: shell |
| 1873 | |
| 1874 | if (cmd%num_tokens == 1) then |
| 1875 | ! Show current config |
| 1876 | call show_config() |
| 1877 | else |
| 1878 | select case(trim(cmd%tokens(2))) |
| 1879 | case('show') |
| 1880 | call show_config() |
| 1881 | case('create') |
| 1882 | call create_default_config() |
| 1883 | case('reload') |
| 1884 | call load_config_file(shell) |
| 1885 | case default |
| 1886 | write(error_unit, '(a)') 'config: usage: config [show|create|reload]' |
| 1887 | shell%last_exit_status = 1 |
| 1888 | return |
| 1889 | end select |
| 1890 | end if |
| 1891 | |
| 1892 | shell%last_exit_status = 0 |
| 1893 | end subroutine |
| 1894 | |
| 1895 | subroutine builtin_alias(cmd, shell) |
| 1896 | type(command_t), intent(in) :: cmd |
| 1897 | type(shell_state_t), intent(inout) :: shell |
| 1898 | integer :: eq_pos, i |
| 1899 | character(len=256) :: alias_name, alias_command |
| 1900 | character(len=:), allocatable :: full_arg |
| 1901 | |
| 1902 | if (cmd%num_tokens == 1) then |
| 1903 | ! Show all aliases |
| 1904 | call show_aliases(shell) |
| 1905 | else if (cmd%num_tokens == 2 .and. trim(cmd%tokens(2)) == '-p') then |
| 1906 | ! POSIX: -p prints all aliases in reusable format (same as no args) |
| 1907 | call show_aliases(shell) |
| 1908 | else if (cmd%num_tokens >= 2) then |
| 1909 | ! Reconstruct the full argument from all tokens |
| 1910 | full_arg = trim(cmd%tokens(2)) |
| 1911 | do i = 3, cmd%num_tokens |
| 1912 | full_arg = trim(full_arg) // ' ' // trim(cmd%tokens(i)) |
| 1913 | end do |
| 1914 | |
| 1915 | ! Check for alias=command format |
| 1916 | eq_pos = index(full_arg, '=') |
| 1917 | if (eq_pos > 0) then |
| 1918 | alias_name = full_arg(:eq_pos-1) |
| 1919 | alias_command = full_arg(eq_pos+1:) |
| 1920 | |
| 1921 | ! Remove quotes or quote sentinels if present |
| 1922 | ! Lexer uses char(2)/char(3) for single-quote boundaries, char(1) for double-quote |
| 1923 | if (len_trim(alias_command) >= 2) then |
| 1924 | ! Check for single-quote sentinels (char(2) start, char(3) end) |
| 1925 | if (alias_command(1:1) == char(2) .and. & |
| 1926 | alias_command(len_trim(alias_command):len_trim(alias_command)) == char(3)) then |
| 1927 | alias_command = alias_command(2:len_trim(alias_command)-1) |
| 1928 | ! Check for actual quote characters (in case they weren't converted) |
| 1929 | else if (alias_command(1:1) == '"' .and. alias_command(len_trim(alias_command):len_trim(alias_command)) == '"') then |
| 1930 | alias_command = alias_command(2:len_trim(alias_command)-1) |
| 1931 | else if (alias_command(1:1) == "'" .and. alias_command(len_trim(alias_command):len_trim(alias_command)) == "'") then |
| 1932 | alias_command = alias_command(2:len_trim(alias_command)-1) |
| 1933 | end if |
| 1934 | end if |
| 1935 | |
| 1936 | call set_alias(shell, trim(alias_name), trim(alias_command)) |
| 1937 | else if (cmd%num_tokens == 2) then |
| 1938 | ! Show specific alias (only if single argument without =) |
| 1939 | alias_name = cmd%tokens(2) |
| 1940 | alias_command = get_alias(shell, trim(alias_name)) |
| 1941 | if (len_trim(alias_command) > 0) then |
| 1942 | write(output_unit, '(a)') 'alias ' // trim(alias_name) // & |
| 1943 | '=' // "'" // trim(alias_command) // "'" |
| 1944 | else |
| 1945 | call write_stderr('alias: ' // trim(alias_name) // ': not found') |
| 1946 | shell%last_exit_status = 1 |
| 1947 | return |
| 1948 | end if |
| 1949 | else |
| 1950 | call write_stderr('alias: usage: alias [name[=value]...]') |
| 1951 | shell%last_exit_status = 1 |
| 1952 | return |
| 1953 | end if |
| 1954 | end if |
| 1955 | |
| 1956 | shell%last_exit_status = 0 |
| 1957 | end subroutine |
| 1958 | |
| 1959 | subroutine builtin_unalias(cmd, shell) |
| 1960 | type(command_t), intent(in) :: cmd |
| 1961 | type(shell_state_t), intent(inout) :: shell |
| 1962 | integer :: i |
| 1963 | logical :: found, any_not_found |
| 1964 | |
| 1965 | if (cmd%num_tokens < 2) then |
| 1966 | call write_stderr('unalias: usage: unalias name...') |
| 1967 | shell%last_exit_status = 1 |
| 1968 | return |
| 1969 | end if |
| 1970 | |
| 1971 | ! Check for -a flag (remove all aliases) |
| 1972 | if (trim(cmd%tokens(2)) == '-a') then |
| 1973 | call clear_all_aliases(shell) |
| 1974 | shell%last_exit_status = 0 |
| 1975 | return |
| 1976 | end if |
| 1977 | |
| 1978 | any_not_found = .false. |
| 1979 | |
| 1980 | ! Remove each specified alias |
| 1981 | do i = 2, cmd%num_tokens |
| 1982 | found = unset_alias(shell, trim(cmd%tokens(i))) |
| 1983 | if (.not. found) any_not_found = .true. |
| 1984 | end do |
| 1985 | |
| 1986 | if (any_not_found) then |
| 1987 | shell%last_exit_status = 1 |
| 1988 | else |
| 1989 | shell%last_exit_status = 0 |
| 1990 | end if |
| 1991 | end subroutine |
| 1992 | |
| 1993 | subroutine builtin_abbr(cmd, shell) |
| 1994 | use abbreviations |
| 1995 | type(command_t), intent(in) :: cmd |
| 1996 | type(shell_state_t), intent(inout) :: shell |
| 1997 | integer :: eq_pos |
| 1998 | character(len=256) :: short_form, expanded_form |
| 1999 | character(len=64) :: abbr_short |
| 2000 | character(len=256) :: abbr_expanded |
| 2001 | |
| 2002 | if (cmd%num_tokens == 1) then |
| 2003 | ! Show all abbreviations |
| 2004 | call show_abbreviations() |
| 2005 | else if (cmd%num_tokens >= 2) then |
| 2006 | ! Check for --erase flag |
| 2007 | if (trim(cmd%tokens(2)) == '--erase' .or. trim(cmd%tokens(2)) == '-e') then |
| 2008 | if (cmd%num_tokens >= 3) then |
| 2009 | abbr_short = trim(cmd%tokens(3)) |
| 2010 | call unset_abbreviation(abbr_short) |
| 2011 | else |
| 2012 | write(error_unit, '(a)') 'abbr: --erase requires an abbreviation name' |
| 2013 | shell%last_exit_status = 1 |
| 2014 | return |
| 2015 | end if |
| 2016 | else if (trim(cmd%tokens(2)) == '--show' .or. trim(cmd%tokens(2)) == '-s') then |
| 2017 | ! Show abbreviations (same as no args) |
| 2018 | call show_abbreviations() |
| 2019 | else |
| 2020 | ! Check for short=expanded format |
| 2021 | eq_pos = index(cmd%tokens(2), '=') |
| 2022 | if (eq_pos > 0) then |
| 2023 | short_form = cmd%tokens(2)(:eq_pos-1) |
| 2024 | expanded_form = cmd%tokens(2)(eq_pos+1:) |
| 2025 | |
| 2026 | ! Remove quotes if present |
| 2027 | if (expanded_form(1:1) == '"' .and. expanded_form(len_trim(expanded_form):len_trim(expanded_form)) == '"') then |
| 2028 | expanded_form = expanded_form(2:len_trim(expanded_form)-1) |
| 2029 | else if (expanded_form(1:1) == "'" .and. expanded_form(len_trim(expanded_form):len_trim(expanded_form)) == "'") then |
| 2030 | expanded_form = expanded_form(2:len_trim(expanded_form)-1) |
| 2031 | end if |
| 2032 | |
| 2033 | abbr_short = trim(short_form) |
| 2034 | abbr_expanded = trim(expanded_form) |
| 2035 | call set_abbreviation(abbr_short, abbr_expanded) |
| 2036 | else |
| 2037 | ! Show specific abbreviation |
| 2038 | abbr_short = trim(cmd%tokens(2)) |
| 2039 | abbr_expanded = get_abbreviation(abbr_short) |
| 2040 | if (len_trim(abbr_expanded) > 0) then |
| 2041 | write(output_unit, '(a)') trim(abbr_short) // & |
| 2042 | ' = ' // trim(abbr_expanded) |
| 2043 | else |
| 2044 | write(error_unit, '(a)') 'abbr: ' // trim(abbr_short) // ': not found' |
| 2045 | shell%last_exit_status = 1 |
| 2046 | return |
| 2047 | end if |
| 2048 | end if |
| 2049 | end if |
| 2050 | end if |
| 2051 | |
| 2052 | shell%last_exit_status = 0 |
| 2053 | end subroutine |
| 2054 | |
| 2055 | subroutine builtin_help(cmd, shell) |
| 2056 | use builtin_help_texts, only: print_builtin_help |
| 2057 | type(command_t), intent(in) :: cmd |
| 2058 | type(shell_state_t), intent(inout) :: shell |
| 2059 | logical :: found |
| 2060 | |
| 2061 | ! Per-builtin help: help <name> |
| 2062 | if (cmd%num_tokens > 1) then |
| 2063 | found = print_builtin_help(trim(cmd%tokens(2))) |
| 2064 | if (.not. found) then |
| 2065 | write(error_unit, '(a)') 'help: no help topics match `' // & |
| 2066 | trim(cmd%tokens(2)) // "'." |
| 2067 | shell%last_exit_status = 1 |
| 2068 | else |
| 2069 | shell%last_exit_status = 0 |
| 2070 | end if |
| 2071 | return |
| 2072 | end if |
| 2073 | |
| 2074 | write(output_unit, '(a)') 'Fortran Shell (fortsh) - Built-in Commands:' |
| 2075 | write(output_unit, '(a)') '========================================' |
| 2076 | write(output_unit, '(a)') '' |
| 2077 | write(output_unit, '(a)') 'Navigation & Directories:' |
| 2078 | write(output_unit, '(a)') ' cd [dir] Change directory (cd - for previous, cd ~ for home)' |
| 2079 | write(output_unit, '(a)') ' pwd Print working directory' |
| 2080 | write(output_unit, '(a)') ' pushd [dir] Push directory onto stack' |
| 2081 | write(output_unit, '(a)') ' popd Pop directory from stack' |
| 2082 | write(output_unit, '(a)') ' dirs [-clpv] Display directory stack' |
| 2083 | write(output_unit, '(a)') ' prevd/nextd Navigate directory stack' |
| 2084 | write(output_unit, '(a)') ' dirh Show directory history' |
| 2085 | write(output_unit, '(a)') '' |
| 2086 | write(output_unit, '(a)') 'Variables & Environment:' |
| 2087 | write(output_unit, '(a)') ' export VAR=val Set/export environment variable' |
| 2088 | write(output_unit, '(a)') ' unset name Remove variable or function' |
| 2089 | write(output_unit, '(a)') ' readonly VAR Mark variable as read-only' |
| 2090 | write(output_unit, '(a)') ' declare [-x] Declare variables with attributes' |
| 2091 | write(output_unit, '(a)') ' local VAR=val Declare function-local variable' |
| 2092 | write(output_unit, '(a)') ' printenv [VAR] Print environment variables' |
| 2093 | write(output_unit, '(a)') ' set [opts] Set shell options (-e, -u, -x, -o pipefail)' |
| 2094 | write(output_unit, '(a)') ' shopt [opt] Toggle shell options' |
| 2095 | write(output_unit, '(a)') '' |
| 2096 | write(output_unit, '(a)') 'I/O & Formatting:' |
| 2097 | write(output_unit, '(a)') ' echo [args] Display text' |
| 2098 | write(output_unit, '(a)') ' printf fmt args Formatted output' |
| 2099 | write(output_unit, '(a)') ' read [-p] var Read input into variable' |
| 2100 | write(output_unit, '(a)') '' |
| 2101 | write(output_unit, '(a)') 'Job Control:' |
| 2102 | write(output_unit, '(a)') ' jobs List active jobs' |
| 2103 | write(output_unit, '(a)') ' fg [%n] Bring job to foreground' |
| 2104 | write(output_unit, '(a)') ' bg [%n] Send job to background' |
| 2105 | write(output_unit, '(a)') ' kill [-sig] pid Send signal to process' |
| 2106 | write(output_unit, '(a)') ' wait [pid] Wait for process to complete' |
| 2107 | write(output_unit, '(a)') ' coproc cmd Start coprocess with bidirectional I/O' |
| 2108 | write(output_unit, '(a)') '' |
| 2109 | write(output_unit, '(a)') 'Shell Features:' |
| 2110 | write(output_unit, '(a)') ' source/. file Execute commands from file' |
| 2111 | write(output_unit, '(a)') ' eval [args] Evaluate arguments as shell command' |
| 2112 | write(output_unit, '(a)') ' exec [cmd] Replace shell with command' |
| 2113 | write(output_unit, '(a)') ' command [-v] cmd Run command bypassing functions' |
| 2114 | write(output_unit, '(a)') ' type/which name Identify command type' |
| 2115 | write(output_unit, '(a)') ' hash [-r] Manage command hash table' |
| 2116 | write(output_unit, '(a)') ' trap [cmd] sig Set signal handlers' |
| 2117 | write(output_unit, '(a)') ' history Show command history' |
| 2118 | write(output_unit, '(a)') ' fc Fix/edit previous commands' |
| 2119 | write(output_unit, '(a)') ' alias [n=cmd] Create/show command aliases' |
| 2120 | write(output_unit, '(a)') ' unalias name Remove alias' |
| 2121 | write(output_unit, '(a)') ' abbr [n=cmd] Manage abbreviations' |
| 2122 | write(output_unit, '(a)') ' config [cmd] Manage shell configuration' |
| 2123 | write(output_unit, '(a)') '' |
| 2124 | write(output_unit, '(a)') 'Scripting & Control Flow:' |
| 2125 | write(output_unit, '(a)') ' test / [ ] / [[ ]] Evaluate conditions' |
| 2126 | write(output_unit, '(a)') ' if/then/elif/else/fi Conditional execution' |
| 2127 | write(output_unit, '(a)') ' for/while/until Loop constructs' |
| 2128 | write(output_unit, '(a)') ' case/esac Pattern matching' |
| 2129 | write(output_unit, '(a)') ' break/continue Loop control' |
| 2130 | write(output_unit, '(a)') ' return [n] Return from function' |
| 2131 | write(output_unit, '(a)') ' shift [n] Shift positional parameters' |
| 2132 | write(output_unit, '(a)') ' getopts str var Parse positional parameters' |
| 2133 | write(output_unit, '(a)') ' let expr Arithmetic evaluation' |
| 2134 | write(output_unit, '(a)') ' : (colon) Null command (always succeeds)' |
| 2135 | write(output_unit, '(a)') '' |
| 2136 | write(output_unit, '(a)') 'System:' |
| 2137 | write(output_unit, '(a)') ' umask [mode] Get/set file creation mask' |
| 2138 | write(output_unit, '(a)') ' ulimit [-a] Get/set resource limits' |
| 2139 | write(output_unit, '(a)') ' times Display process times' |
| 2140 | write(output_unit, '(a)') '' |
| 2141 | write(output_unit, '(a)') 'Completion:' |
| 2142 | write(output_unit, '(a)') ' complete Define programmable completions' |
| 2143 | write(output_unit, '(a)') ' compgen Generate completion matches' |
| 2144 | write(output_unit, '(a)') '' |
| 2145 | write(output_unit, '(a)') 'Other:' |
| 2146 | write(output_unit, '(a)') ' perf [on|off] Performance monitoring' |
| 2147 | write(output_unit, '(a)') ' memory [cmd] Memory pool management' |
| 2148 | write(output_unit, '(a)') ' help Show this help message' |
| 2149 | write(output_unit, '(a)') ' exit [code] Exit shell' |
| 2150 | write(output_unit, '(a)') '' |
| 2151 | write(output_unit, '(a)') 'Interactive Keybindings:' |
| 2152 | write(output_unit, '(a)') ' Up/Down Navigate command history' |
| 2153 | write(output_unit, '(a)') ' Ctrl+A/E Move to beginning/end of line' |
| 2154 | write(output_unit, '(a)') ' Ctrl+W/K/U Kill word/to-end/line' |
| 2155 | write(output_unit, '(a)') ' Ctrl+Y Yank (paste) killed text' |
| 2156 | write(output_unit, '(a)') ' Ctrl+R Reverse history search' |
| 2157 | write(output_unit, '(a)') ' Ctrl+L Clear screen' |
| 2158 | write(output_unit, '(a)') ' Tab Smart completion with menu' |
| 2159 | write(output_unit, '(a)') ' Ctrl+F fzf file browser' |
| 2160 | write(output_unit, '(a)') ' Alt+j fzf directory jump' |
| 2161 | write(output_unit, '(a)') ' Alt+g fzf git browser' |
| 2162 | |
| 2163 | shell%last_exit_status = 0 |
| 2164 | end subroutine |
| 2165 | |
| 2166 | subroutine builtin_perf(cmd, shell) |
| 2167 | type(command_t), intent(in) :: cmd |
| 2168 | type(shell_state_t), intent(inout) :: shell |
| 2169 | |
| 2170 | if (cmd%num_tokens > 1) then |
| 2171 | select case(trim(cmd%tokens(2))) |
| 2172 | case('on') |
| 2173 | call set_performance_monitoring(.true.) |
| 2174 | write(output_unit, '(a)') 'Performance monitoring enabled' |
| 2175 | case('off') |
| 2176 | call set_performance_monitoring(.false.) |
| 2177 | write(output_unit, '(a)') 'Performance monitoring disabled' |
| 2178 | case('stats', 'status') |
| 2179 | call print_performance_stats() |
| 2180 | case('reset') |
| 2181 | total_commands = 0 |
| 2182 | total_parse_time = 0 |
| 2183 | total_exec_time = 0 |
| 2184 | total_glob_time = 0 |
| 2185 | write(output_unit, '(a)') 'Performance counters reset' |
| 2186 | case default |
| 2187 | write(error_unit, '(a)') 'perf: Usage: perf [on|off|stats|reset]' |
| 2188 | shell%last_exit_status = 1 |
| 2189 | return |
| 2190 | end select |
| 2191 | else |
| 2192 | ! Show current status |
| 2193 | if (perf_monitoring_enabled) then |
| 2194 | write(output_unit, '(a)') 'Performance monitoring: ENABLED' |
| 2195 | else |
| 2196 | write(output_unit, '(a)') 'Performance monitoring: DISABLED' |
| 2197 | end if |
| 2198 | write(output_unit, '(a,i15)') 'Commands processed: ', total_commands |
| 2199 | write(output_unit, '(a,i15,a)') 'Memory usage: ', get_memory_usage(), ' KB' |
| 2200 | end if |
| 2201 | |
| 2202 | shell%last_exit_status = 0 |
| 2203 | end subroutine |
| 2204 | |
| 2205 | subroutine builtin_memory(cmd, shell) |
| 2206 | type(command_t), intent(in) :: cmd |
| 2207 | type(shell_state_t), intent(inout) :: shell |
| 2208 | |
| 2209 | if (cmd%num_tokens > 1) then |
| 2210 | select case(trim(cmd%tokens(2))) |
| 2211 | case('optimize') |
| 2212 | call optimize_memory_pools() |
| 2213 | write(output_unit, '(a)') 'Memory pools optimized' |
| 2214 | case('stats') |
| 2215 | call print_pool_stats() |
| 2216 | case('auto') |
| 2217 | call auto_optimize_memory() |
| 2218 | write(output_unit, '(a)') 'Auto memory optimization triggered' |
| 2219 | case default |
| 2220 | write(error_unit, '(a)') 'memory: Usage: memory [optimize|stats|auto]' |
| 2221 | shell%last_exit_status = 1 |
| 2222 | return |
| 2223 | end select |
| 2224 | else |
| 2225 | ! Show memory status |
| 2226 | write(output_unit, '(a)') 'Memory Usage Summary:' |
| 2227 | write(output_unit, '(a)') '====================' |
| 2228 | write(output_unit, '(a,i15)') 'Current allocations: ', current_allocations |
| 2229 | write(output_unit, '(a,i15)') 'Peak allocations: ', peak_allocations |
| 2230 | write(output_unit, '(a,i15,a)') 'Current memory: ', current_memory_used, ' bytes' |
| 2231 | write(output_unit, '(a,i15,a)') 'Peak memory: ', peak_memory_used, ' bytes' |
| 2232 | |
| 2233 | if (needs_memory_optimization()) then |
| 2234 | write(output_unit, '(a)') '' |
| 2235 | write(output_unit, '(a)') 'Tip: Memory optimization recommended. Run "memory optimize"' |
| 2236 | end if |
| 2237 | end if |
| 2238 | |
| 2239 | shell%last_exit_status = 0 |
| 2240 | end subroutine |
| 2241 | |
| 2242 | subroutine builtin_rawtest(cmd, shell) |
| 2243 | type(command_t), intent(in) :: cmd |
| 2244 | type(shell_state_t), intent(inout) :: shell |
| 2245 | type(termios_t) :: original_termios |
| 2246 | character :: ch |
| 2247 | logical :: success |
| 2248 | integer :: char_code |
| 2249 | |
| 2250 | if (.false.) print *, cmd%num_tokens ! Silence unused warning |
| 2251 | |
| 2252 | write(output_unit, '(a)') 'Raw mode test - press keys to see codes, q to quit:' |
| 2253 | write(output_unit, '(a)') 'Entering raw mode...' |
| 2254 | |
| 2255 | ! Enable raw mode |
| 2256 | success = enable_raw_mode(original_termios) |
| 2257 | if (.not. success) then |
| 2258 | write(error_unit, '(a)') 'rawtest: Failed to enable raw mode' |
| 2259 | shell%last_exit_status = 1 |
| 2260 | return |
| 2261 | end if |
| 2262 | |
| 2263 | ! Read characters until 'q' is pressed |
| 2264 | do |
| 2265 | success = read_single_char(ch) |
| 2266 | if (.not. success) exit |
| 2267 | |
| 2268 | char_code = iachar(ch) |
| 2269 | |
| 2270 | ! Exit on 'q' |
| 2271 | if (ch == 'q' .or. ch == 'Q') exit |
| 2272 | |
| 2273 | ! Handle special characters |
| 2274 | if (char_code == 27) then |
| 2275 | ! Escape sequence - try to read more |
| 2276 | write(output_unit, '(a)', advance='no') 'ESC ' |
| 2277 | success = read_single_char(ch) |
| 2278 | if (success) then |
| 2279 | write(output_unit, '(a,i15)', advance='no') '[', iachar(ch) |
| 2280 | if (ch == '[') then |
| 2281 | success = read_single_char(ch) |
| 2282 | if (success) then |
| 2283 | write(output_unit, '(a,i15,a)', advance='no') '[', iachar(ch), '] = ' |
| 2284 | select case(ch) |
| 2285 | case('A') |
| 2286 | write(output_unit, '(a)') 'UP ARROW' |
| 2287 | case('B') |
| 2288 | write(output_unit, '(a)') 'DOWN ARROW' |
| 2289 | case('C') |
| 2290 | write(output_unit, '(a)') 'RIGHT ARROW' |
| 2291 | case('D') |
| 2292 | write(output_unit, '(a)') 'LEFT ARROW' |
| 2293 | case default |
| 2294 | write(output_unit, '(a)') 'UNKNOWN ESCAPE' |
| 2295 | end select |
| 2296 | end if |
| 2297 | else |
| 2298 | write(output_unit, '(a)') '] = ALT+key' |
| 2299 | end if |
| 2300 | end if |
| 2301 | else if (char_code < 32) then |
| 2302 | ! Control character |
| 2303 | write(output_unit, '(a,i15,a)') 'CTRL+', char_code, ' (^', char(char_code + 64), ')' |
| 2304 | else if (char_code == 127) then |
| 2305 | write(output_unit, '(a)') 'BACKSPACE/DELETE (127)' |
| 2306 | else |
| 2307 | ! Regular character |
| 2308 | write(output_unit, '(a,a,a,i15,a)') 'Regular: ''', ch, ''' (', char_code, ')' |
| 2309 | end if |
| 2310 | end do |
| 2311 | |
| 2312 | ! Restore terminal |
| 2313 | success = restore_terminal(original_termios) |
| 2314 | if (.not. success) then |
| 2315 | write(error_unit, '(a)') 'rawtest: Warning - failed to restore terminal' |
| 2316 | end if |
| 2317 | |
| 2318 | write(output_unit, '(a)') '' |
| 2319 | write(output_unit, '(a)') 'Raw mode test completed.' |
| 2320 | shell%last_exit_status = 0 |
| 2321 | end subroutine |
| 2322 | |
| 2323 | subroutine builtin_defun(cmd, shell) |
| 2324 | type(command_t), intent(in) :: cmd |
| 2325 | type(shell_state_t), intent(inout) :: shell |
| 2326 | |
| 2327 | character(len=:), allocatable :: function_body |
| 2328 | character(len=256) :: func_name |
| 2329 | integer :: i |
| 2330 | |
| 2331 | if (cmd%num_tokens < 3) then |
| 2332 | write(error_unit, '(a)') 'defun: usage: defun function_name "command1; command2"' |
| 2333 | shell%last_exit_status = 1 |
| 2334 | return |
| 2335 | end if |
| 2336 | |
| 2337 | func_name = trim(cmd%tokens(2)) |
| 2338 | |
| 2339 | ! Reconstruct the function body from all remaining tokens |
| 2340 | ! This handles cases where the parser split the quoted string |
| 2341 | function_body = trim(cmd%tokens(3)) |
| 2342 | do i = 4, cmd%num_tokens |
| 2343 | function_body = trim(function_body) // ' ' // trim(cmd%tokens(i)) |
| 2344 | end do |
| 2345 | |
| 2346 | ! Strip quotes from function body |
| 2347 | if (len(function_body) >= 2) then |
| 2348 | if (function_body(1:1) == '"' .or. function_body(1:1) == "'") then |
| 2349 | ! Check if last character is also a quote |
| 2350 | if (function_body(len(function_body):len(function_body)) == '"' .or. & |
| 2351 | function_body(len(function_body):len(function_body)) == "'") then |
| 2352 | ! Remove first and last character (quotes) |
| 2353 | function_body = function_body(2:len(function_body)-1) |
| 2354 | end if |
| 2355 | end if |
| 2356 | end if |
| 2357 | |
| 2358 | call add_function(shell, func_name, [function_body], 1) |
| 2359 | shell%last_exit_status = 0 |
| 2360 | end subroutine |
| 2361 | |
| 2362 | ! Coprocess built-in command: coproc [NAME] command [args] |
| 2363 | subroutine builtin_coproc(cmd, shell) |
| 2364 | use coprocess, only: start_coprocess, coprocs |
| 2365 | use variables, only: set_array_element, set_shell_variable |
| 2366 | type(command_t), intent(in) :: cmd |
| 2367 | type(shell_state_t), intent(inout) :: shell |
| 2368 | |
| 2369 | character(len=256) :: coproc_name, command_str |
| 2370 | integer :: coproc_id, i, cmd_start_idx |
| 2371 | character(len=16) :: fd_str |
| 2372 | |
| 2373 | ! Default name |
| 2374 | coproc_name = 'COPROC' |
| 2375 | |
| 2376 | ! Parse arguments: coproc [NAME] command [args] |
| 2377 | if (cmd%num_tokens < 2) then |
| 2378 | write(error_unit, '(a)') 'coproc: usage: coproc [NAME] command [args]' |
| 2379 | shell%last_exit_status = 1 |
| 2380 | return |
| 2381 | end if |
| 2382 | |
| 2383 | ! Check if first argument is a name (uppercase letters) |
| 2384 | if (cmd%num_tokens >= 3 .and. is_valid_coproc_name(cmd%tokens(2))) then |
| 2385 | coproc_name = trim(cmd%tokens(2)) |
| 2386 | cmd_start_idx = 3 |
| 2387 | else |
| 2388 | cmd_start_idx = 2 |
| 2389 | end if |
| 2390 | |
| 2391 | ! Build command string from remaining tokens |
| 2392 | command_str = '' |
| 2393 | do i = cmd_start_idx, cmd%num_tokens |
| 2394 | if (i > cmd_start_idx) then |
| 2395 | command_str = trim(command_str) // ' ' // trim(cmd%tokens(i)) |
| 2396 | else |
| 2397 | command_str = trim(cmd%tokens(i)) |
| 2398 | end if |
| 2399 | end do |
| 2400 | |
| 2401 | ! Start the coprocess |
| 2402 | coproc_id = start_coprocess(trim(command_str), trim(coproc_name), shell%is_interactive) |
| 2403 | |
| 2404 | if (coproc_id < 0) then |
| 2405 | write(error_unit, '(a)') 'coproc: failed to start coprocess' |
| 2406 | shell%last_exit_status = 1 |
| 2407 | return |
| 2408 | end if |
| 2409 | |
| 2410 | ! Set NAME_PID variable (e.g., COPROC_PID) |
| 2411 | block |
| 2412 | character(len=16) :: pid_str |
| 2413 | write(pid_str, '(I0)') coprocs(coproc_id)%pid |
| 2414 | call set_shell_variable(shell, & |
| 2415 | trim(coproc_name) // '_PID', trim(pid_str)) |
| 2416 | end block |
| 2417 | |
| 2418 | ! Create array variables: NAME[0] = read_fd, NAME[1] = write_fd |
| 2419 | write(fd_str, '(I0)') coprocs(coproc_id)%read_fd |
| 2420 | call set_array_element(shell, trim(coproc_name), 1, trim(fd_str)) ! Bash index 0 = Fortran index 1 |
| 2421 | write(fd_str, '(I0)') coprocs(coproc_id)%write_fd |
| 2422 | call set_array_element(shell, trim(coproc_name), 2, trim(fd_str)) ! Bash index 1 = Fortran index 2 |
| 2423 | |
| 2424 | shell%last_exit_status = 0 |
| 2425 | end subroutine |
| 2426 | |
| 2427 | ! Helper: Check if name is valid (uppercase letters/digits/underscore) |
| 2428 | function is_valid_coproc_name(name) result(is_valid) |
| 2429 | character(len=*), intent(in) :: name |
| 2430 | logical :: is_valid |
| 2431 | integer :: i |
| 2432 | character :: c |
| 2433 | |
| 2434 | is_valid = .false. |
| 2435 | if (len_trim(name) == 0) return |
| 2436 | |
| 2437 | ! Name must start with letter or underscore |
| 2438 | c = name(1:1) |
| 2439 | if (.not. ((c >= 'A' .and. c <= 'Z') .or. c == '_')) return |
| 2440 | |
| 2441 | ! Rest can be letters, digits, or underscore |
| 2442 | do i = 2, len_trim(name) |
| 2443 | c = name(i:i) |
| 2444 | if (.not. ((c >= 'A' .and. c <= 'Z') .or. (c >= '0' .and. c <= '9') .or. c == '_')) return |
| 2445 | end do |
| 2446 | |
| 2447 | is_valid = .true. |
| 2448 | end function |
| 2449 | |
| 2450 | subroutine builtin_timeout(cmd, shell) |
| 2451 | type(command_t), intent(in) :: cmd |
| 2452 | type(shell_state_t), intent(inout) :: shell |
| 2453 | |
| 2454 | integer :: timeout_seconds, i |
| 2455 | character(len=:), allocatable :: command |
| 2456 | |
| 2457 | if (cmd%num_tokens < 3) then |
| 2458 | write(error_unit, '(a)') 'timeout: usage: timeout DURATION COMMAND...' |
| 2459 | shell%last_exit_status = 1 |
| 2460 | return |
| 2461 | end if |
| 2462 | |
| 2463 | read(cmd%tokens(2), *, iostat=i) timeout_seconds |
| 2464 | if (i /= 0 .or. timeout_seconds <= 0) then |
| 2465 | write(error_unit, '(a)') 'timeout: invalid duration' |
| 2466 | shell%last_exit_status = 1 |
| 2467 | return |
| 2468 | end if |
| 2469 | |
| 2470 | ! Reconstruct command from remaining tokens |
| 2471 | command = '' |
| 2472 | do i = 3, cmd%num_tokens |
| 2473 | if (i > 3) command = trim(command) // ' ' |
| 2474 | command = trim(command) // trim(cmd%tokens(i)) |
| 2475 | end do |
| 2476 | |
| 2477 | ! Execute command with timeout - placeholder |
| 2478 | shell%last_exit_status = 0 |
| 2479 | end subroutine |
| 2480 | |
| 2481 | ! ============================================================================= |
| 2482 | ! POSIX Required Built-ins (Phase 10: Critical POSIX Compliance) |
| 2483 | ! ============================================================================= |
| 2484 | |
| 2485 | subroutine builtin_type(cmd, shell) |
| 2486 | type(command_t), intent(in) :: cmd |
| 2487 | type(shell_state_t), intent(inout) :: shell |
| 2488 | |
| 2489 | character(len=256) :: command_name |
| 2490 | character(len=:), allocatable :: full_path |
| 2491 | integer :: i |
| 2492 | logical :: any_not_found |
| 2493 | |
| 2494 | if (cmd%num_tokens < 2) then |
| 2495 | write(error_unit, '(a)') 'type: usage: type name [name ...]' |
| 2496 | shell%last_exit_status = 1 |
| 2497 | return |
| 2498 | end if |
| 2499 | |
| 2500 | any_not_found = .false. |
| 2501 | |
| 2502 | do i = 2, cmd%num_tokens |
| 2503 | command_name = trim(cmd%tokens(i)) |
| 2504 | |
| 2505 | if (is_builtin(command_name)) then |
| 2506 | write(output_unit, '(a)') trim(command_name) // ' is a shell builtin' |
| 2507 | else if (is_alias(shell, command_name)) then |
| 2508 | write(output_unit, '(a)') trim(command_name) // ' is aliased to `' // & |
| 2509 | trim(get_alias(shell, command_name)) // "'" |
| 2510 | else if (is_function(shell, command_name)) then |
| 2511 | write(output_unit, '(a)') trim(command_name) // ' is a function' |
| 2512 | else |
| 2513 | ! Try to find in PATH |
| 2514 | allocate(character(len=MAX_PATH_LEN) :: full_path) |
| 2515 | if (find_executable_in_path(shell, command_name, full_path)) then |
| 2516 | write(output_unit, '(a)') trim(command_name) // ' is ' // trim(full_path) |
| 2517 | else |
| 2518 | write(error_unit, '(a)') trim(command_name) // ': not found' |
| 2519 | any_not_found = .true. |
| 2520 | end if |
| 2521 | end if |
| 2522 | end do |
| 2523 | |
| 2524 | if (any_not_found) then |
| 2525 | shell%last_exit_status = 1 |
| 2526 | else |
| 2527 | shell%last_exit_status = 0 |
| 2528 | end if |
| 2529 | end subroutine |
| 2530 | |
| 2531 | subroutine builtin_unset(cmd, shell) |
| 2532 | use ast_executor, only: unset_ast_function |
| 2533 | type(command_t), intent(in) :: cmd |
| 2534 | type(shell_state_t), intent(inout) :: shell |
| 2535 | |
| 2536 | logical :: unset_functions |
| 2537 | character(len=256) :: var_name |
| 2538 | integer :: i, j, start_idx |
| 2539 | |
| 2540 | unset_functions = .false. |
| 2541 | |
| 2542 | if (cmd%num_tokens < 2) then |
| 2543 | write(error_unit, '(a)') 'unset: usage: unset [-f] name [name ...]' |
| 2544 | shell%last_exit_status = 1 |
| 2545 | return |
| 2546 | end if |
| 2547 | |
| 2548 | start_idx = 2 |
| 2549 | if (trim(cmd%tokens(2)) == '-f') then |
| 2550 | unset_functions = .true. |
| 2551 | start_idx = 3 |
| 2552 | if (cmd%num_tokens < 3) then |
| 2553 | write(error_unit, '(a)') 'unset: usage: unset [-f] name [name ...]' |
| 2554 | shell%last_exit_status = 1 |
| 2555 | return |
| 2556 | end if |
| 2557 | end if |
| 2558 | |
| 2559 | do i = start_idx, cmd%num_tokens |
| 2560 | var_name = trim(cmd%tokens(i)) |
| 2561 | |
| 2562 | if (unset_functions) then |
| 2563 | ! Unset function from both old and new function storage |
| 2564 | |
| 2565 | ! Clear from old executor's function storage |
| 2566 | do j = 1, shell%num_functions |
| 2567 | if (trim(shell%functions(j)%name) == var_name) then |
| 2568 | shell%functions(j)%name = '' |
| 2569 | shell%functions(j)%body_lines = 0 |
| 2570 | if (allocated(shell%functions(j)%body)) deallocate(shell%functions(j)%body) |
| 2571 | exit |
| 2572 | end if |
| 2573 | end do |
| 2574 | |
| 2575 | ! Clear from AST executor's function cache |
| 2576 | call unset_ast_function(var_name) |
| 2577 | else |
| 2578 | ! Check for array element syntax: arr[index] |
| 2579 | block |
| 2580 | integer :: bracket_pos, bracket_end, arr_idx, iostat_v |
| 2581 | character(len=256) :: arr_name, idx_str |
| 2582 | bracket_pos = index(var_name, '[') |
| 2583 | if (bracket_pos > 0) then |
| 2584 | bracket_end = index(var_name, ']') |
| 2585 | if (bracket_end > bracket_pos) then |
| 2586 | arr_name = var_name(:bracket_pos-1) |
| 2587 | idx_str = var_name(bracket_pos+1:bracket_end-1) |
| 2588 | ! Check for associative array first |
| 2589 | if (is_associative_array(shell, trim(arr_name))) then |
| 2590 | call unset_assoc_array_key(shell, & |
| 2591 | trim(arr_name), trim(idx_str)) |
| 2592 | else |
| 2593 | read(idx_str, *, iostat=iostat_v) arr_idx |
| 2594 | if (iostat_v == 0) then |
| 2595 | arr_idx = arr_idx + 1 ! 0→1 based |
| 2596 | call set_array_element(shell, & |
| 2597 | trim(arr_name), arr_idx, '') |
| 2598 | end if |
| 2599 | end if |
| 2600 | cycle |
| 2601 | end if |
| 2602 | end if |
| 2603 | end block |
| 2604 | |
| 2605 | ! Unset variable - check local scope first |
| 2606 | block |
| 2607 | logical :: found_local |
| 2608 | integer :: lv_depth, lv_i |
| 2609 | found_local = .false. |
| 2610 | if (shell%function_depth > 0) then |
| 2611 | lv_depth = shell%function_depth |
| 2612 | if (lv_depth <= size(shell%local_var_counts)) then |
| 2613 | do lv_i = 1, shell%local_var_counts(lv_depth) |
| 2614 | if (trim(shell%local_vars(lv_depth, lv_i)%name) & |
| 2615 | == trim(var_name)) then |
| 2616 | if (shell%local_vars(lv_depth, lv_i)%readonly) then |
| 2617 | write(error_unit, '(a)') 'unset: ' // & |
| 2618 | trim(var_name) // & |
| 2619 | ': cannot unset readonly variable' |
| 2620 | shell%last_exit_status = 1 |
| 2621 | return |
| 2622 | end if |
| 2623 | ! Mark local variable as unset (value_len=-1 sentinel) |
| 2624 | ! This keeps it shadowing the global but treated as unset |
| 2625 | shell%local_vars(lv_depth, lv_i)%value = '' |
| 2626 | shell%local_vars(lv_depth, lv_i)%value_len = -1 |
| 2627 | ! Special handling: restore default IFS when unset |
| 2628 | if (trim(var_name) == 'IFS') then |
| 2629 | shell%ifs = ' ' // char(9) // char(10) |
| 2630 | shell%ifs_len = -1 |
| 2631 | end if |
| 2632 | found_local = .true. |
| 2633 | exit |
| 2634 | end if |
| 2635 | end do |
| 2636 | end if |
| 2637 | end if |
| 2638 | if (.not. found_local) then |
| 2639 | do j = 1, shell%num_variables |
| 2640 | if (trim(shell%variables(j)%name) == var_name) then |
| 2641 | ! Check if variable is readonly |
| 2642 | if (shell%variables(j)%readonly) then |
| 2643 | write(error_unit, '(a)') 'unset: ' // & |
| 2644 | trim(var_name) // & |
| 2645 | ': cannot unset readonly variable' |
| 2646 | shell%last_exit_status = 1 |
| 2647 | return |
| 2648 | end if |
| 2649 | ! Unset from environment if exported |
| 2650 | if (shell%variables(j)%exported) then |
| 2651 | call unset_environment_var(var_name) |
| 2652 | end if |
| 2653 | shell%variables(j)%name = '' |
| 2654 | shell%variables(j)%value = '' |
| 2655 | shell%variables(j)%is_array = .false. |
| 2656 | shell%variables(j)%is_assoc_array = .false. |
| 2657 | shell%variables(j)%readonly = .false. |
| 2658 | shell%variables(j)%exported = .false. |
| 2659 | shell%variables(j)%array_size = 0 |
| 2660 | shell%variables(j)%assoc_size = 0 |
| 2661 | ! Special handling: restore default IFS when unset |
| 2662 | if (trim(var_name) == 'IFS') then |
| 2663 | shell%ifs = ' ' // char(9) // char(10) |
| 2664 | shell%ifs_len = -1 |
| 2665 | end if |
| 2666 | exit |
| 2667 | end if |
| 2668 | end do |
| 2669 | end if |
| 2670 | end block |
| 2671 | end if |
| 2672 | end do |
| 2673 | |
| 2674 | shell%last_exit_status = 0 |
| 2675 | end subroutine |
| 2676 | |
| 2677 | subroutine builtin_readonly(cmd, shell) |
| 2678 | use variables, only: set_shell_variable |
| 2679 | type(command_t), intent(in) :: cmd |
| 2680 | type(shell_state_t), intent(inout) :: shell |
| 2681 | integer :: eq_pos, i, j, arg_idx |
| 2682 | character(len=MAX_TOKEN_LEN) :: var_name, var_value |
| 2683 | logical :: print_mode, found |
| 2684 | |
| 2685 | print_mode = .false. |
| 2686 | arg_idx = 2 |
| 2687 | |
| 2688 | ! Parse -p flag |
| 2689 | if (cmd%num_tokens >= 2 .and. trim(cmd%tokens(2)) == '-p') then |
| 2690 | print_mode = .true. |
| 2691 | arg_idx = 3 |
| 2692 | end if |
| 2693 | |
| 2694 | if (cmd%num_tokens < 2) then |
| 2695 | ! No arguments: print all readonly variables |
| 2696 | print_mode = .true. |
| 2697 | end if |
| 2698 | |
| 2699 | if (print_mode) then |
| 2700 | ! Print all readonly variables (including special readonly params) |
| 2701 | ! Match bash behavior: include PPID, UID, EUID, and shell options |
| 2702 | block |
| 2703 | use system_interface, only: c_getuid, c_geteuid |
| 2704 | character(len=20) :: ppid_str, uid_str, euid_str |
| 2705 | character(len=256) :: shellopts |
| 2706 | |
| 2707 | ! PPID - parent process ID |
| 2708 | write(ppid_str, '(i0)') shell%parent_pid |
| 2709 | write(output_unit, '(a)') 'readonly PPID=' // trim(ppid_str) |
| 2710 | |
| 2711 | ! UID - real user ID |
| 2712 | write(uid_str, '(i0)') c_getuid() |
| 2713 | write(output_unit, '(a)') 'readonly UID=' // trim(uid_str) |
| 2714 | |
| 2715 | ! EUID - effective user ID |
| 2716 | write(euid_str, '(i0)') c_geteuid() |
| 2717 | write(output_unit, '(a)') 'readonly EUID=' // trim(euid_str) |
| 2718 | |
| 2719 | ! SHELLOPTS - shell option settings (bash compatibility) |
| 2720 | shellopts = '' |
| 2721 | if (shell%option_braceexpand) shellopts = trim(shellopts) // ':braceexpand' |
| 2722 | if (shell%option_hashall) shellopts = trim(shellopts) // ':hashall' |
| 2723 | shellopts = trim(shellopts) // ':interactive-comments' ! Always on |
| 2724 | if (len_trim(shellopts) > 0 .and. shellopts(1:1) == ':') shellopts = shellopts(2:) |
| 2725 | write(output_unit, '(a)') 'readonly SHELLOPTS="' // trim(shellopts) // '"' |
| 2726 | |
| 2727 | ! FORTSH_VERSION - shell version |
| 2728 | write(output_unit, '(a)') 'readonly FORTSH_VERSION="0.1.0"' |
| 2729 | |
| 2730 | ! HOSTNAME - system hostname (bash compatibility) |
| 2731 | write(output_unit, '(a)') 'readonly HOSTNAME="' // trim(shell%hostname) // '"' |
| 2732 | end block |
| 2733 | ! Print user-defined readonly variables in declare -r format |
| 2734 | do i = 1, shell%num_variables |
| 2735 | if (shell%variables(i)%readonly .and. len_trim(shell%variables(i)%name) > 0) then |
| 2736 | write(output_unit, '(a)') 'declare -r ' // trim(shell%variables(i)%name) // '="' // & |
| 2737 | trim(shell%variables(i)%value) // '"' |
| 2738 | end if |
| 2739 | end do |
| 2740 | shell%last_exit_status = 0 |
| 2741 | return |
| 2742 | end if |
| 2743 | |
| 2744 | ! Process each argument |
| 2745 | do arg_idx = 2, cmd%num_tokens |
| 2746 | eq_pos = index(cmd%tokens(arg_idx), '=') |
| 2747 | |
| 2748 | if (eq_pos > 0) then |
| 2749 | ! VAR=value form - set and mark readonly |
| 2750 | var_name = cmd%tokens(arg_idx)(:eq_pos-1) |
| 2751 | var_value = cmd%tokens(arg_idx)(eq_pos+1:) |
| 2752 | |
| 2753 | ! Check if variable already exists and is readonly |
| 2754 | found = .false. |
| 2755 | do j = 1, shell%num_variables |
| 2756 | if (trim(shell%variables(j)%name) == trim(var_name)) then |
| 2757 | if (shell%variables(j)%readonly) then |
| 2758 | write(error_unit, '(a)') trim(var_name) // ': readonly variable' |
| 2759 | shell%last_exit_status = 1 |
| 2760 | return |
| 2761 | end if |
| 2762 | found = .true. |
| 2763 | exit |
| 2764 | end if |
| 2765 | end do |
| 2766 | |
| 2767 | ! Set the variable |
| 2768 | call set_shell_variable(shell, trim(var_name), trim(var_value)) |
| 2769 | |
| 2770 | ! Mark as readonly |
| 2771 | do j = 1, shell%num_variables |
| 2772 | if (trim(shell%variables(j)%name) == trim(var_name)) then |
| 2773 | shell%variables(j)%readonly = .true. |
| 2774 | exit |
| 2775 | end if |
| 2776 | end do |
| 2777 | else |
| 2778 | ! Just VAR - mark existing variable as readonly |
| 2779 | var_name = trim(cmd%tokens(arg_idx)) |
| 2780 | found = .false. |
| 2781 | |
| 2782 | do j = 1, shell%num_variables |
| 2783 | if (trim(shell%variables(j)%name) == var_name) then |
| 2784 | if (shell%variables(j)%readonly) then |
| 2785 | write(error_unit, '(a)') trim(var_name) // ': readonly variable' |
| 2786 | shell%last_exit_status = 1 |
| 2787 | return |
| 2788 | end if |
| 2789 | shell%variables(j)%readonly = .true. |
| 2790 | found = .true. |
| 2791 | exit |
| 2792 | end if |
| 2793 | end do |
| 2794 | |
| 2795 | if (.not. found) then |
| 2796 | ! Variable doesn't exist, create it with empty value and mark readonly |
| 2797 | call set_shell_variable(shell, var_name, '') |
| 2798 | do j = 1, shell%num_variables |
| 2799 | if (trim(shell%variables(j)%name) == var_name) then |
| 2800 | shell%variables(j)%readonly = .true. |
| 2801 | exit |
| 2802 | end if |
| 2803 | end do |
| 2804 | end if |
| 2805 | end if |
| 2806 | end do |
| 2807 | |
| 2808 | shell%last_exit_status = 0 |
| 2809 | end subroutine |
| 2810 | |
| 2811 | subroutine builtin_local(cmd, shell) |
| 2812 | type(command_t), intent(in) :: cmd |
| 2813 | type(shell_state_t), intent(inout) :: shell |
| 2814 | integer :: i, eq_pos, depth, var_index, fi, start_arg |
| 2815 | character(len=256) :: var_name |
| 2816 | character(len=:), allocatable :: var_value |
| 2817 | logical :: integer_flag, readonly_flag, array_flag |
| 2818 | character(len=MAX_TOKEN_LEN) :: flag_str |
| 2819 | |
| 2820 | ! Check if we're inside a function |
| 2821 | if (shell%function_depth == 0) then |
| 2822 | write(error_unit, '(a)') 'local: can only be used in a function' |
| 2823 | shell%last_exit_status = 1 |
| 2824 | return |
| 2825 | end if |
| 2826 | |
| 2827 | ! Check depth is within bounds |
| 2828 | depth = shell%function_depth |
| 2829 | if (depth > size(shell%local_var_counts)) then |
| 2830 | write(error_unit, '(a)') 'local: function nesting too deep' |
| 2831 | shell%last_exit_status = 1 |
| 2832 | return |
| 2833 | end if |
| 2834 | |
| 2835 | ! Parse flags |
| 2836 | integer_flag = .false. |
| 2837 | readonly_flag = .false. |
| 2838 | array_flag = .false. |
| 2839 | start_arg = 2 |
| 2840 | do while (start_arg <= cmd%num_tokens) |
| 2841 | if (cmd%tokens(start_arg)(1:1) == '-' .and. len_trim(cmd%tokens(start_arg)) >= 2 .and. & |
| 2842 | index(cmd%tokens(start_arg), '=') == 0) then |
| 2843 | flag_str = trim(cmd%tokens(start_arg)) |
| 2844 | do fi = 2, len_trim(flag_str) |
| 2845 | select case (flag_str(fi:fi)) |
| 2846 | case ('i'); integer_flag = .true. |
| 2847 | case ('r'); readonly_flag = .true. |
| 2848 | case ('a'); array_flag = .true. |
| 2849 | case default |
| 2850 | ! Ignore unknown flags |
| 2851 | end select |
| 2852 | end do |
| 2853 | start_arg = start_arg + 1 |
| 2854 | else |
| 2855 | exit |
| 2856 | end if |
| 2857 | end do |
| 2858 | |
| 2859 | ! Process each variable assignment |
| 2860 | do i = start_arg, cmd%num_tokens |
| 2861 | eq_pos = index(cmd%tokens(i), '=') |
| 2862 | |
| 2863 | if (eq_pos > 0) then |
| 2864 | ! Variable assignment: local var=value |
| 2865 | var_name = cmd%tokens(i)(:eq_pos-1) |
| 2866 | var_value = cmd%tokens(i)(eq_pos+1:) |
| 2867 | |
| 2868 | ! Handle array initialization: local -a arr=(a b c) |
| 2869 | if (array_flag .and. len_trim(var_value) > 0 .and. & |
| 2870 | var_value(1:1) == '(') then |
| 2871 | block |
| 2872 | use variables, only: set_array_variable |
| 2873 | character(len=256) :: arr_elems(100) |
| 2874 | integer :: ne, k, es |
| 2875 | character(len=:), allocatable :: content |
| 2876 | content = trim(var_value) |
| 2877 | if (content(len(content):len(content)) == ')') then |
| 2878 | content = content(2:len(content)-1) |
| 2879 | else |
| 2880 | content = content(2:) |
| 2881 | end if |
| 2882 | ne = 0 |
| 2883 | es = 1 |
| 2884 | do k = 1, len_trim(content) |
| 2885 | if (content(k:k) == ' ') then |
| 2886 | if (k > es) then |
| 2887 | ne = ne + 1 |
| 2888 | arr_elems(ne) = content(es:k-1) |
| 2889 | end if |
| 2890 | es = k + 1 |
| 2891 | end if |
| 2892 | end do |
| 2893 | if (es <= len_trim(content)) then |
| 2894 | ne = ne + 1 |
| 2895 | arr_elems(ne) = content(es:len_trim(content)) |
| 2896 | end if |
| 2897 | call set_array_variable(shell, trim(var_name), & |
| 2898 | arr_elems, ne) |
| 2899 | ! Track array in local_vars for cleanup on function return |
| 2900 | var_index = shell%local_var_counts(depth) + 1 |
| 2901 | if (var_index <= size(shell%local_vars, 2)) then |
| 2902 | shell%local_var_counts(depth) = var_index |
| 2903 | shell%local_vars(depth, var_index)%name = trim(var_name) |
| 2904 | shell%local_vars(depth, var_index)%value = '' |
| 2905 | shell%local_vars(depth, var_index)%value_len = 0 |
| 2906 | shell%local_vars(depth, var_index)%is_array = .true. |
| 2907 | end if |
| 2908 | end block |
| 2909 | cycle |
| 2910 | end if |
| 2911 | |
| 2912 | ! Evaluate arithmetic if integer flag is set |
| 2913 | if (integer_flag .and. len_trim(var_value) > 0) then |
| 2914 | block |
| 2915 | use expansion, only: arithmetic_expansion_shell |
| 2916 | character(len=:), allocatable :: arith_expr, arith_result |
| 2917 | arith_expr = '$((' // trim(var_value) // '))' |
| 2918 | arith_result = trim(arithmetic_expansion_shell( & |
| 2919 | trim(arith_expr), shell)) |
| 2920 | var_value = arith_result |
| 2921 | end block |
| 2922 | end if |
| 2923 | |
| 2924 | ! Find or create local variable slot |
| 2925 | var_index = shell%local_var_counts(depth) + 1 |
| 2926 | if (var_index > size(shell%local_vars, 2)) then |
| 2927 | write(error_unit, '(a)') 'local: too many local variables' |
| 2928 | shell%last_exit_status = 1 |
| 2929 | return |
| 2930 | end if |
| 2931 | |
| 2932 | ! Store local variable |
| 2933 | shell%local_vars(depth, var_index)%name = var_name |
| 2934 | shell%local_vars(depth, var_index)%value = var_value |
| 2935 | shell%local_vars(depth, var_index)%readonly = readonly_flag |
| 2936 | shell%local_vars(depth, var_index)%exported = .false. |
| 2937 | shell%local_vars(depth, var_index)%is_integer = integer_flag |
| 2938 | shell%local_var_counts(depth) = var_index |
| 2939 | |
| 2940 | ! Special handling: IFS needs shell state update for word splitting |
| 2941 | if (trim(var_name) == 'IFS') then |
| 2942 | shell%ifs = trim(var_value) |
| 2943 | shell%ifs_len = len_trim(var_value) |
| 2944 | end if |
| 2945 | else |
| 2946 | ! Just declare local: local var (unset or empty) |
| 2947 | var_name = trim(cmd%tokens(i)) |
| 2948 | |
| 2949 | var_index = shell%local_var_counts(depth) + 1 |
| 2950 | if (var_index > size(shell%local_vars, 2)) then |
| 2951 | write(error_unit, '(a)') 'local: too many local variables' |
| 2952 | shell%last_exit_status = 1 |
| 2953 | return |
| 2954 | end if |
| 2955 | |
| 2956 | shell%local_vars(depth, var_index)%name = var_name |
| 2957 | shell%local_vars(depth, var_index)%value = '' |
| 2958 | shell%local_vars(depth, var_index)%readonly = .false. |
| 2959 | shell%local_vars(depth, var_index)%exported = .false. |
| 2960 | shell%local_var_counts(depth) = var_index |
| 2961 | end if |
| 2962 | end do |
| 2963 | |
| 2964 | shell%last_exit_status = 0 |
| 2965 | end subroutine |
| 2966 | |
| 2967 | subroutine builtin_shift(cmd, shell) |
| 2968 | type(command_t), intent(in) :: cmd |
| 2969 | type(shell_state_t), intent(inout) :: shell |
| 2970 | integer :: shift_count, iostat |
| 2971 | |
| 2972 | shift_count = 1 ! Default shift by 1 |
| 2973 | |
| 2974 | if (cmd%num_tokens > 1) then |
| 2975 | ! Parse shift count from argument |
| 2976 | read(cmd%tokens(2), *, iostat=iostat) shift_count |
| 2977 | if (iostat /= 0) then |
| 2978 | write(error_unit, '(a)') 'shift: numeric argument required' |
| 2979 | shell%last_exit_status = 1 |
| 2980 | return |
| 2981 | end if |
| 2982 | end if |
| 2983 | |
| 2984 | if (shift_count < 0) then |
| 2985 | write(error_unit, '(a)') 'shift: shift count out of range' |
| 2986 | shell%last_exit_status = 1 |
| 2987 | return |
| 2988 | end if |
| 2989 | |
| 2990 | if (shift_count > shell%num_positional) then |
| 2991 | write(error_unit, '(a)') 'shift: shift count out of range' |
| 2992 | shell%last_exit_status = 1 |
| 2993 | return |
| 2994 | end if |
| 2995 | |
| 2996 | call shift_positional_params(shell, shift_count) |
| 2997 | shell%last_exit_status = 0 |
| 2998 | end subroutine |
| 2999 | |
| 3000 | subroutine builtin_break(cmd, shell) |
| 3001 | type(command_t), intent(in) :: cmd |
| 3002 | type(shell_state_t), intent(inout) :: shell |
| 3003 | integer :: break_count, i, iostat |
| 3004 | logical :: invalid_count |
| 3005 | |
| 3006 | ! Default to breaking 1 level |
| 3007 | break_count = 1 |
| 3008 | invalid_count = .false. |
| 3009 | |
| 3010 | ! Parse optional numeric argument |
| 3011 | if (cmd%num_tokens > 1) then |
| 3012 | read(cmd%tokens(2), *, iostat=iostat) break_count |
| 3013 | if (iostat /= 0) then |
| 3014 | write(error_unit, '(a)') 'break: invalid number' |
| 3015 | shell%last_exit_status = 1 |
| 3016 | return |
| 3017 | end if |
| 3018 | if (break_count < 1) then |
| 3019 | ! POSIX: behavior for n < 1 is unspecified, silently treat as 1 |
| 3020 | invalid_count = .true. |
| 3021 | break_count = 1 |
| 3022 | end if |
| 3023 | end if |
| 3024 | |
| 3025 | ! Find the nearest loop and set break flag |
| 3026 | do i = shell%control_depth, 1, -1 |
| 3027 | if (shell%control_stack(i)%block_type == BLOCK_FOR .or. & |
| 3028 | shell%control_stack(i)%block_type == BLOCK_WHILE .or. & |
| 3029 | shell%control_stack(i)%block_type == BLOCK_UNTIL .or. & |
| 3030 | shell%control_stack(i)%block_type == BLOCK_FOR_ARITH) then |
| 3031 | ! POSIX: if break is already requested, don't change exit status |
| 3032 | ! This preserves the status from the first break command (e.g., "break 0 || break") |
| 3033 | if (.not. shell%control_stack(i)%break_requested) then |
| 3034 | shell%control_stack(i)%break_requested = .true. |
| 3035 | shell%control_stack(i)%break_level = break_count |
| 3036 | ! POSIX: invalid count still breaks loop, but with exit status 1 |
| 3037 | if (invalid_count) then |
| 3038 | shell%last_exit_status = 1 |
| 3039 | else |
| 3040 | shell%last_exit_status = 0 |
| 3041 | end if |
| 3042 | end if |
| 3043 | return |
| 3044 | end if |
| 3045 | end do |
| 3046 | |
| 3047 | ! No loop found - POSIX says behavior is unspecified |
| 3048 | ! For maximum compatibility, silently return success (like POSIX sh) |
| 3049 | shell%last_exit_status = 0 |
| 3050 | end subroutine |
| 3051 | |
| 3052 | subroutine builtin_continue(cmd, shell) |
| 3053 | type(command_t), intent(in) :: cmd |
| 3054 | type(shell_state_t), intent(inout) :: shell |
| 3055 | integer :: continue_count, i, iostat |
| 3056 | logical :: invalid_count |
| 3057 | |
| 3058 | ! Default to continuing 1 level |
| 3059 | continue_count = 1 |
| 3060 | invalid_count = .false. |
| 3061 | |
| 3062 | ! Parse optional numeric argument |
| 3063 | if (cmd%num_tokens > 1) then |
| 3064 | read(cmd%tokens(2), *, iostat=iostat) continue_count |
| 3065 | if (iostat /= 0) then |
| 3066 | write(error_unit, '(a)') 'continue: invalid number' |
| 3067 | shell%last_exit_status = 1 |
| 3068 | return |
| 3069 | end if |
| 3070 | if (continue_count < 1) then |
| 3071 | ! POSIX: behavior for n < 1 is unspecified, silently treat as 1 |
| 3072 | invalid_count = .true. |
| 3073 | continue_count = 1 |
| 3074 | end if |
| 3075 | end if |
| 3076 | |
| 3077 | ! Find the nearest loop and set continue flag |
| 3078 | do i = shell%control_depth, 1, -1 |
| 3079 | if (shell%control_stack(i)%block_type == BLOCK_FOR .or. & |
| 3080 | shell%control_stack(i)%block_type == BLOCK_WHILE .or. & |
| 3081 | shell%control_stack(i)%block_type == BLOCK_UNTIL .or. & |
| 3082 | shell%control_stack(i)%block_type == BLOCK_FOR_ARITH) then |
| 3083 | ! POSIX: if continue is already requested, don't change exit status |
| 3084 | ! This preserves the status from the first continue command (e.g., "continue 0 || continue") |
| 3085 | if (.not. shell%control_stack(i)%continue_requested) then |
| 3086 | shell%control_stack(i)%continue_requested = .true. |
| 3087 | shell%control_stack(i)%continue_level = continue_count |
| 3088 | ! POSIX: invalid count still continues loop, but with exit status 1 |
| 3089 | if (invalid_count) then |
| 3090 | shell%last_exit_status = 1 |
| 3091 | else |
| 3092 | shell%last_exit_status = 0 |
| 3093 | end if |
| 3094 | end if |
| 3095 | return |
| 3096 | end if |
| 3097 | end do |
| 3098 | |
| 3099 | ! No loop found - POSIX says behavior is unspecified |
| 3100 | ! For maximum compatibility, silently return success (like POSIX sh) |
| 3101 | shell%last_exit_status = 0 |
| 3102 | end subroutine |
| 3103 | |
| 3104 | subroutine builtin_return(cmd, shell) |
| 3105 | type(command_t), intent(in) :: cmd |
| 3106 | type(shell_state_t), intent(inout) :: shell |
| 3107 | integer :: return_code, iostat |
| 3108 | |
| 3109 | ! POSIX: return outside function/sourced script should fail |
| 3110 | ! Return silently with exit status 2 (like bash) |
| 3111 | if (shell%function_depth == 0 .and. shell%source_depth == 0) then |
| 3112 | shell%last_exit_status = 2 |
| 3113 | return |
| 3114 | end if |
| 3115 | |
| 3116 | ! Default to last command's exit status |
| 3117 | return_code = shell%last_exit_status |
| 3118 | |
| 3119 | ! Parse optional return value argument |
| 3120 | if (cmd%num_tokens > 1) then |
| 3121 | read(cmd%tokens(2), *, iostat=iostat) return_code |
| 3122 | if (iostat /= 0) then |
| 3123 | write(error_unit, '(a)') 'return: numeric argument required' |
| 3124 | shell%last_exit_status = 2 |
| 3125 | return |
| 3126 | end if |
| 3127 | end if |
| 3128 | |
| 3129 | ! Set the return value and flag to exit function |
| 3130 | shell%function_return_value = return_code |
| 3131 | shell%last_exit_status = return_code |
| 3132 | shell%function_return_pending = .true. |
| 3133 | end subroutine |
| 3134 | |
| 3135 | subroutine builtin_exec(cmd, shell) |
| 3136 | use command_builtin, only: find_command_full_path |
| 3137 | use fd_redirection, only: apply_single_redirection |
| 3138 | use parser, only: expand_variables |
| 3139 | use system_interface, only: file_exists, file_is_executable |
| 3140 | type(command_t), intent(in) :: cmd |
| 3141 | type(shell_state_t), intent(inout) :: shell |
| 3142 | |
| 3143 | character(len=256), target :: c_prog_name |
| 3144 | character(len=256), target, allocatable :: c_args(:) |
| 3145 | type(c_ptr), allocatable, target :: argv(:) |
| 3146 | integer :: i, ret |
| 3147 | character(len=MAX_PATH_LEN) :: prog_path |
| 3148 | logical :: redir_success |
| 3149 | type(redirection_t) :: expanded_redir |
| 3150 | character(len=:), allocatable :: expanded_filename |
| 3151 | |
| 3152 | ! exec without arguments but with redirections applies them to the current shell |
| 3153 | if (cmd%num_tokens < 2) then |
| 3154 | if (cmd%num_redirections > 0) then |
| 3155 | ! Apply redirections to the current shell process (permanent=.true. for exec) |
| 3156 | do i = 1, cmd%num_redirections |
| 3157 | ! Make a copy of the redirection and expand the filename |
| 3158 | expanded_redir = cmd%redirections(i) |
| 3159 | if (allocated(cmd%redirections(i)%filename)) then |
| 3160 | call expand_variables(trim(cmd%redirections(i)%filename), expanded_filename, shell) |
| 3161 | if (allocated(expanded_filename)) then |
| 3162 | expanded_redir%filename = expanded_filename |
| 3163 | end if |
| 3164 | end if |
| 3165 | call apply_single_redirection(expanded_redir, redir_success, shell%option_noclobber, permanent=.true.) |
| 3166 | if (.not. redir_success) then |
| 3167 | shell%last_exit_status = 1 |
| 3168 | return |
| 3169 | end if |
| 3170 | end do |
| 3171 | shell%last_exit_status = 0 |
| 3172 | return |
| 3173 | else |
| 3174 | ! No command and no redirections - just return success |
| 3175 | shell%last_exit_status = 0 |
| 3176 | return |
| 3177 | end if |
| 3178 | end if |
| 3179 | |
| 3180 | ! Get the command name |
| 3181 | c_prog_name = trim(cmd%tokens(2)) // c_null_char |
| 3182 | |
| 3183 | ! Find full path for the command (if it's not an absolute/relative path) |
| 3184 | if (index(cmd%tokens(2), '/') == 0) then |
| 3185 | prog_path = find_command_full_path(trim(cmd%tokens(2))) |
| 3186 | if (len_trim(prog_path) == 0) then |
| 3187 | write(error_unit, '(a)') 'exec: ' // trim(cmd%tokens(2)) // ': command not found' |
| 3188 | shell%last_exit_status = 127 |
| 3189 | return |
| 3190 | end if |
| 3191 | c_prog_name = trim(prog_path) // c_null_char |
| 3192 | else |
| 3193 | ! Absolute or relative path - check if it exists |
| 3194 | if (.not. file_exists(trim(cmd%tokens(2)))) then |
| 3195 | write(error_unit, '(a)') 'exec: ' // trim(cmd%tokens(2)) // ': No such file or directory' |
| 3196 | shell%last_exit_status = 127 |
| 3197 | return |
| 3198 | end if |
| 3199 | ! Check if it's executable |
| 3200 | if (.not. file_is_executable(trim(cmd%tokens(2)))) then |
| 3201 | write(error_unit, '(a)') 'exec: ' // trim(cmd%tokens(2)) // ': Permission denied' |
| 3202 | shell%last_exit_status = 126 |
| 3203 | return |
| 3204 | end if |
| 3205 | end if |
| 3206 | |
| 3207 | ! Build argv array for execvp (NULL-terminated array of C string pointers) |
| 3208 | ! argv[0] is the program name, argv[1..n-1] are arguments, argv[n] is NULL |
| 3209 | allocate(c_args(cmd%num_tokens - 1)) |
| 3210 | allocate(argv(cmd%num_tokens)) |
| 3211 | |
| 3212 | ! First argument is program name |
| 3213 | c_args(1) = trim(cmd%tokens(2)) // c_null_char |
| 3214 | argv(1) = c_loc(c_args(1)) |
| 3215 | |
| 3216 | ! Copy remaining arguments |
| 3217 | do i = 3, cmd%num_tokens |
| 3218 | c_args(i - 1) = trim(cmd%tokens(i)) // c_null_char |
| 3219 | argv(i - 1) = c_loc(c_args(i - 1)) |
| 3220 | end do |
| 3221 | |
| 3222 | ! NULL-terminate the argv array |
| 3223 | argv(cmd%num_tokens) = c_null_ptr |
| 3224 | |
| 3225 | ! Apply any redirections before exec |
| 3226 | if (cmd%num_redirections > 0) then |
| 3227 | do i = 1, cmd%num_redirections |
| 3228 | call apply_single_redirection(cmd%redirections(i), redir_success, shell%option_noclobber) |
| 3229 | if (.not. redir_success) then |
| 3230 | shell%last_exit_status = 1 |
| 3231 | return |
| 3232 | end if |
| 3233 | end do |
| 3234 | end if |
| 3235 | |
| 3236 | ! Replace the current process with the new command |
| 3237 | ! If execvp succeeds, this function never returns |
| 3238 | ret = c_execvp(c_loc(c_prog_name), c_loc(argv)) |
| 3239 | |
| 3240 | ! If we reach here, execvp failed |
| 3241 | ! Clean up allocations |
| 3242 | deallocate(c_args) |
| 3243 | deallocate(argv) |
| 3244 | |
| 3245 | ! Report error |
| 3246 | write(error_unit, '(a)') 'exec: ' // trim(cmd%tokens(2)) // ': cannot execute' |
| 3247 | shell%last_exit_status = 126 |
| 3248 | end subroutine |
| 3249 | |
| 3250 | subroutine builtin_eval(cmd, shell) |
| 3251 | use eval_builtin, only: execute_eval |
| 3252 | type(command_t), intent(in) :: cmd |
| 3253 | type(shell_state_t), intent(inout) :: shell |
| 3254 | |
| 3255 | ! Delegate to the eval_builtin module to avoid circular dependency |
| 3256 | call execute_eval(cmd, shell) |
| 3257 | end subroutine |
| 3258 | |
| 3259 | subroutine builtin_hash(cmd, shell) |
| 3260 | use command_builtin, only: find_command_full_path |
| 3261 | type(command_t), intent(in) :: cmd |
| 3262 | type(shell_state_t), intent(inout) :: shell |
| 3263 | character(len=256) :: cmd_name, pathname |
| 3264 | integer :: i, j |
| 3265 | logical :: remove_mode, list_mode, path_mode, delete_mode |
| 3266 | character(len=MAX_PATH_LEN) :: found_path |
| 3267 | |
| 3268 | remove_mode = .false. |
| 3269 | list_mode = .false. |
| 3270 | path_mode = .false. |
| 3271 | delete_mode = .false. |
| 3272 | |
| 3273 | ! Parse options |
| 3274 | if (cmd%num_tokens > 1) then |
| 3275 | if (trim(cmd%tokens(2)) == '-r') then |
| 3276 | ! Clear hash table |
| 3277 | shell%num_hashed_commands = 0 |
| 3278 | do i = 1, size(shell%command_hash) |
| 3279 | shell%command_hash(i)%command_name = '' |
| 3280 | shell%command_hash(i)%full_path = '' |
| 3281 | shell%command_hash(i)%hits = 0 |
| 3282 | end do |
| 3283 | shell%last_exit_status = 0 |
| 3284 | return |
| 3285 | else if (trim(cmd%tokens(2)) == '-l') then |
| 3286 | list_mode = .true. |
| 3287 | else if (trim(cmd%tokens(2)) == '-d') then |
| 3288 | delete_mode = .true. |
| 3289 | if (cmd%num_tokens < 3) then |
| 3290 | write(error_unit, '(a)') 'hash: -d requires an argument' |
| 3291 | shell%last_exit_status = 1 |
| 3292 | return |
| 3293 | end if |
| 3294 | else if (trim(cmd%tokens(2)) == '-t') then |
| 3295 | ! Print cached path for specified commands |
| 3296 | if (cmd%num_tokens < 3) then |
| 3297 | write(error_unit, '(a)') 'hash: -t requires an argument' |
| 3298 | shell%last_exit_status = 1 |
| 3299 | return |
| 3300 | end if |
| 3301 | shell%last_exit_status = 0 |
| 3302 | do i = 3, cmd%num_tokens |
| 3303 | block |
| 3304 | logical :: found_in_hash |
| 3305 | found_in_hash = .false. |
| 3306 | do j = 1, shell%num_hashed_commands |
| 3307 | if (trim(shell%command_hash(j)%command_name) == trim(cmd%tokens(i))) then |
| 3308 | write(output_unit, '(a)') trim(shell%command_hash(j)%full_path) |
| 3309 | found_in_hash = .true. |
| 3310 | exit |
| 3311 | end if |
| 3312 | end do |
| 3313 | if (.not. found_in_hash) then |
| 3314 | write(error_unit, '(a,a,a)') 'hash: ', trim(cmd%tokens(i)), ': not found' |
| 3315 | shell%last_exit_status = 1 |
| 3316 | end if |
| 3317 | end block |
| 3318 | end do |
| 3319 | flush(output_unit) |
| 3320 | return |
| 3321 | else if (trim(cmd%tokens(2)) == '-p') then |
| 3322 | path_mode = .true. |
| 3323 | if (cmd%num_tokens < 4) then |
| 3324 | write(error_unit, '(a)') 'hash: usage: hash -p pathname name' |
| 3325 | shell%last_exit_status = 1 |
| 3326 | return |
| 3327 | end if |
| 3328 | end if |
| 3329 | end if |
| 3330 | |
| 3331 | ! hash with no arguments - display hash table |
| 3332 | if (cmd%num_tokens == 1) then |
| 3333 | if (shell%num_hashed_commands == 0) then |
| 3334 | write(output_unit, '(a)') 'hash: hash table empty' |
| 3335 | flush(output_unit) |
| 3336 | shell%last_exit_status = 0 |
| 3337 | return |
| 3338 | end if |
| 3339 | write(output_unit, '(a,a1,a)') 'hits', achar(9), 'command' |
| 3340 | do i = 1, shell%num_hashed_commands |
| 3341 | if (len_trim(shell%command_hash(i)%command_name) > 0) then |
| 3342 | write(output_unit, '(i4,a1,a)') shell%command_hash(i)%hits, achar(9), & |
| 3343 | trim(shell%command_hash(i)%full_path) |
| 3344 | end if |
| 3345 | end do |
| 3346 | shell%last_exit_status = 0 |
| 3347 | return |
| 3348 | end if |
| 3349 | |
| 3350 | ! hash -l - list format |
| 3351 | if (list_mode) then |
| 3352 | do i = 1, shell%num_hashed_commands |
| 3353 | if (len_trim(shell%command_hash(i)%command_name) > 0) then |
| 3354 | write(output_unit, '(a)') 'builtin hash -p ' // & |
| 3355 | trim(shell%command_hash(i)%full_path) // ' ' // & |
| 3356 | trim(shell%command_hash(i)%command_name) |
| 3357 | end if |
| 3358 | end do |
| 3359 | shell%last_exit_status = 0 |
| 3360 | return |
| 3361 | end if |
| 3362 | |
| 3363 | ! hash -d name - delete specific command |
| 3364 | if (delete_mode) then |
| 3365 | cmd_name = trim(cmd%tokens(3)) |
| 3366 | do i = 1, shell%num_hashed_commands |
| 3367 | if (trim(shell%command_hash(i)%command_name) == cmd_name) then |
| 3368 | ! Remove this entry by shifting others down |
| 3369 | do j = i, shell%num_hashed_commands - 1 |
| 3370 | shell%command_hash(j) = shell%command_hash(j + 1) |
| 3371 | end do |
| 3372 | shell%command_hash(shell%num_hashed_commands)%command_name = '' |
| 3373 | shell%command_hash(shell%num_hashed_commands)%full_path = '' |
| 3374 | shell%command_hash(shell%num_hashed_commands)%hits = 0 |
| 3375 | shell%num_hashed_commands = shell%num_hashed_commands - 1 |
| 3376 | shell%last_exit_status = 0 |
| 3377 | return |
| 3378 | end if |
| 3379 | end do |
| 3380 | ! Silently fail (POSIX compatible behavior) |
| 3381 | shell%last_exit_status = 1 |
| 3382 | return |
| 3383 | end if |
| 3384 | |
| 3385 | ! hash -p pathname name - add with explicit path |
| 3386 | if (path_mode) then |
| 3387 | pathname = trim(cmd%tokens(3)) |
| 3388 | cmd_name = trim(cmd%tokens(4)) |
| 3389 | |
| 3390 | ! Check if command already exists |
| 3391 | do i = 1, shell%num_hashed_commands |
| 3392 | if (trim(shell%command_hash(i)%command_name) == cmd_name) then |
| 3393 | shell%command_hash(i)%full_path = pathname |
| 3394 | shell%last_exit_status = 0 |
| 3395 | return |
| 3396 | end if |
| 3397 | end do |
| 3398 | |
| 3399 | ! Add new entry |
| 3400 | if (shell%num_hashed_commands < size(shell%command_hash)) then |
| 3401 | shell%num_hashed_commands = shell%num_hashed_commands + 1 |
| 3402 | shell%command_hash(shell%num_hashed_commands)%command_name = cmd_name |
| 3403 | shell%command_hash(shell%num_hashed_commands)%full_path = pathname |
| 3404 | shell%command_hash(shell%num_hashed_commands)%hits = 0 |
| 3405 | shell%last_exit_status = 0 |
| 3406 | else |
| 3407 | write(error_unit, '(a)') 'hash: hash table full' |
| 3408 | shell%last_exit_status = 1 |
| 3409 | end if |
| 3410 | return |
| 3411 | end if |
| 3412 | |
| 3413 | ! hash name [name...] - add commands to hash table |
| 3414 | do i = 2, cmd%num_tokens |
| 3415 | cmd_name = trim(cmd%tokens(i)) |
| 3416 | |
| 3417 | ! Search PATH for command |
| 3418 | found_path = find_command_full_path(cmd_name) |
| 3419 | if (len_trim(found_path) == 0) then |
| 3420 | write(error_unit, '(a)') 'hash: ' // trim(cmd_name) // ': not found' |
| 3421 | shell%last_exit_status = 1 |
| 3422 | cycle |
| 3423 | end if |
| 3424 | |
| 3425 | ! Check if command already exists |
| 3426 | do j = 1, shell%num_hashed_commands |
| 3427 | if (trim(shell%command_hash(j)%command_name) == cmd_name) then |
| 3428 | shell%command_hash(j)%full_path = found_path |
| 3429 | shell%last_exit_status = 0 |
| 3430 | goto 100 ! Skip to next command |
| 3431 | end if |
| 3432 | end do |
| 3433 | |
| 3434 | ! Add new entry |
| 3435 | if (shell%num_hashed_commands < size(shell%command_hash)) then |
| 3436 | shell%num_hashed_commands = shell%num_hashed_commands + 1 |
| 3437 | shell%command_hash(shell%num_hashed_commands)%command_name = cmd_name |
| 3438 | shell%command_hash(shell%num_hashed_commands)%full_path = found_path |
| 3439 | shell%command_hash(shell%num_hashed_commands)%hits = 0 |
| 3440 | else |
| 3441 | write(error_unit, '(a)') 'hash: hash table full' |
| 3442 | shell%last_exit_status = 1 |
| 3443 | end if |
| 3444 | |
| 3445 | 100 continue |
| 3446 | end do |
| 3447 | |
| 3448 | ! Don't reset exit status if an error occurred during processing |
| 3449 | ! (e.g., command not found) |
| 3450 | end subroutine |
| 3451 | |
| 3452 | subroutine builtin_umask(cmd, shell) |
| 3453 | type(command_t), intent(in) :: cmd |
| 3454 | type(shell_state_t), intent(inout) :: shell |
| 3455 | integer(c_int) :: current_mask, new_mask, temp_mask |
| 3456 | integer :: new_mask_int, iostat |
| 3457 | logical :: symbolic_mode, print_mode |
| 3458 | character(len=16) :: mask_str |
| 3459 | |
| 3460 | symbolic_mode = .false. |
| 3461 | print_mode = .false. |
| 3462 | |
| 3463 | ! Parse options |
| 3464 | if (cmd%num_tokens > 1) then |
| 3465 | if (trim(cmd%tokens(2)) == '-S') then |
| 3466 | symbolic_mode = .true. |
| 3467 | else if (trim(cmd%tokens(2)) == '-p') then |
| 3468 | print_mode = .true. |
| 3469 | else if (cmd%tokens(2)(1:1) == '-') then |
| 3470 | write(error_unit, '(a)') 'umask: invalid option: ' // trim(cmd%tokens(2)) |
| 3471 | shell%last_exit_status = 1 |
| 3472 | return |
| 3473 | end if |
| 3474 | end if |
| 3475 | |
| 3476 | ! Get current umask (set to 0 temporarily, then restore) |
| 3477 | current_mask = c_umask(0_c_int) ! Save the current mask |
| 3478 | temp_mask = c_umask(current_mask) ! Restore it |
| 3479 | |
| 3480 | ! If no value specified, display current mask |
| 3481 | if (cmd%num_tokens == 1 .or. symbolic_mode .or. print_mode) then |
| 3482 | if (symbolic_mode) then |
| 3483 | ! Display in symbolic form: u=rwx,g=rx,o=rx |
| 3484 | call print_umask_symbolic(current_mask) |
| 3485 | else if (print_mode) then |
| 3486 | ! Display in a form that can be reused as input |
| 3487 | write(mask_str, '(o4.4)') current_mask |
| 3488 | write(output_unit, '(a)') 'umask ' // trim(adjustl(mask_str)) |
| 3489 | else |
| 3490 | ! Display in octal (default) |
| 3491 | write(mask_str, '(o4.4)') current_mask |
| 3492 | write(output_unit, '(a)') trim(adjustl(mask_str)) |
| 3493 | end if |
| 3494 | shell%last_exit_status = 0 |
| 3495 | return |
| 3496 | end if |
| 3497 | |
| 3498 | ! Set new mask |
| 3499 | ! Determine starting index for mask value (skip -S or -p if present) |
| 3500 | if (trim(cmd%tokens(2)) == '-S' .or. trim(cmd%tokens(2)) == '-p') then |
| 3501 | if (cmd%num_tokens < 3) then |
| 3502 | write(error_unit, '(a)') 'umask: usage: umask [-p] [-S] [mode]' |
| 3503 | shell%last_exit_status = 1 |
| 3504 | return |
| 3505 | end if |
| 3506 | mask_str = trim(cmd%tokens(3)) |
| 3507 | else |
| 3508 | mask_str = trim(cmd%tokens(2)) |
| 3509 | end if |
| 3510 | |
| 3511 | ! Parse octal mask value |
| 3512 | read(mask_str, '(o10)', iostat=iostat) new_mask_int |
| 3513 | if (iostat /= 0) then |
| 3514 | write(error_unit, '(a)') 'umask: invalid mode: ' // trim(mask_str) |
| 3515 | shell%last_exit_status = 1 |
| 3516 | return |
| 3517 | end if |
| 3518 | |
| 3519 | ! Validate mask (should be 0-0777) |
| 3520 | if (new_mask_int < 0 .or. new_mask_int > int(o'0777')) then |
| 3521 | write(error_unit, '(a)') 'umask: octal number out of range' |
| 3522 | shell%last_exit_status = 1 |
| 3523 | return |
| 3524 | end if |
| 3525 | |
| 3526 | ! Set the new mask |
| 3527 | new_mask = int(new_mask_int, c_int) |
| 3528 | temp_mask = c_umask(new_mask) |
| 3529 | |
| 3530 | shell%last_exit_status = 0 |
| 3531 | end subroutine |
| 3532 | |
| 3533 | subroutine print_umask_symbolic(mask) |
| 3534 | integer(c_int), intent(in) :: mask |
| 3535 | character(len=32) :: perm_str |
| 3536 | integer :: u_perm, g_perm, o_perm |
| 3537 | |
| 3538 | ! Extract permissions for user, group, and others |
| 3539 | ! umask inverts permissions, so we need to flip bits |
| 3540 | u_perm = iand(ishft(not(mask), -6), 7) ! User permissions |
| 3541 | g_perm = iand(ishft(not(mask), -3), 7) ! Group permissions |
| 3542 | o_perm = iand(not(mask), 7) ! Other permissions |
| 3543 | |
| 3544 | ! Build symbolic string |
| 3545 | perm_str = 'u=' |
| 3546 | if (iand(u_perm, 4) /= 0) perm_str = trim(perm_str) // 'r' |
| 3547 | if (iand(u_perm, 2) /= 0) perm_str = trim(perm_str) // 'w' |
| 3548 | if (iand(u_perm, 1) /= 0) perm_str = trim(perm_str) // 'x' |
| 3549 | |
| 3550 | perm_str = trim(perm_str) // ',g=' |
| 3551 | if (iand(g_perm, 4) /= 0) perm_str = trim(perm_str) // 'r' |
| 3552 | if (iand(g_perm, 2) /= 0) perm_str = trim(perm_str) // 'w' |
| 3553 | if (iand(g_perm, 1) /= 0) perm_str = trim(perm_str) // 'x' |
| 3554 | |
| 3555 | perm_str = trim(perm_str) // ',o=' |
| 3556 | if (iand(o_perm, 4) /= 0) perm_str = trim(perm_str) // 'r' |
| 3557 | if (iand(o_perm, 2) /= 0) perm_str = trim(perm_str) // 'w' |
| 3558 | if (iand(o_perm, 1) /= 0) perm_str = trim(perm_str) // 'x' |
| 3559 | |
| 3560 | write(output_unit, '(a)') trim(perm_str) |
| 3561 | end subroutine |
| 3562 | |
| 3563 | subroutine builtin_ulimit(cmd, shell) |
| 3564 | type(command_t), intent(in) :: cmd |
| 3565 | type(shell_state_t), intent(inout) :: shell |
| 3566 | |
| 3567 | type(rlimit_t) :: rlim |
| 3568 | integer :: i, ret, resource |
| 3569 | character(len=256) :: arg, value_str |
| 3570 | logical :: show_all, set_hard, set_soft, setting_value |
| 3571 | integer(c_long) :: new_limit |
| 3572 | character(len=20) :: limit_name |
| 3573 | |
| 3574 | ! Default: query soft limit for file size |
| 3575 | resource = RLIMIT_FSIZE |
| 3576 | show_all = .false. |
| 3577 | set_hard = .false. |
| 3578 | set_soft = .true. ! Default to soft limit |
| 3579 | setting_value = .false. |
| 3580 | limit_name = 'file size' |
| 3581 | |
| 3582 | ! Parse options |
| 3583 | i = 2 |
| 3584 | do while (i <= cmd%num_tokens) |
| 3585 | arg = trim(cmd%tokens(i)) |
| 3586 | |
| 3587 | if (arg == '-a') then |
| 3588 | show_all = .true. |
| 3589 | i = i + 1 |
| 3590 | else if (arg == '-H') then |
| 3591 | set_hard = .true. |
| 3592 | set_soft = .false. |
| 3593 | i = i + 1 |
| 3594 | else if (arg == '-S') then |
| 3595 | set_soft = .true. |
| 3596 | set_hard = .false. |
| 3597 | i = i + 1 |
| 3598 | else if (arg == '-c') then |
| 3599 | resource = RLIMIT_CORE |
| 3600 | limit_name = 'core file size' |
| 3601 | i = i + 1 |
| 3602 | else if (arg == '-d') then |
| 3603 | resource = RLIMIT_DATA |
| 3604 | limit_name = 'data seg size' |
| 3605 | i = i + 1 |
| 3606 | else if (arg == '-f') then |
| 3607 | resource = RLIMIT_FSIZE |
| 3608 | limit_name = 'file size' |
| 3609 | i = i + 1 |
| 3610 | else if (arg == '-l') then |
| 3611 | resource = RLIMIT_MEMLOCK |
| 3612 | limit_name = 'max locked memory' |
| 3613 | i = i + 1 |
| 3614 | else if (arg == '-m') then |
| 3615 | resource = RLIMIT_RSS |
| 3616 | limit_name = 'max memory size' |
| 3617 | i = i + 1 |
| 3618 | else if (arg == '-n') then |
| 3619 | resource = RLIMIT_NOFILE |
| 3620 | limit_name = 'open files' |
| 3621 | i = i + 1 |
| 3622 | else if (arg == '-s') then |
| 3623 | resource = RLIMIT_STACK |
| 3624 | limit_name = 'stack size' |
| 3625 | i = i + 1 |
| 3626 | else if (arg == '-t') then |
| 3627 | resource = RLIMIT_CPU |
| 3628 | limit_name = 'cpu time' |
| 3629 | i = i + 1 |
| 3630 | else if (arg == '-u') then |
| 3631 | resource = RLIMIT_NPROC |
| 3632 | limit_name = 'max user processes' |
| 3633 | i = i + 1 |
| 3634 | else if (arg == '-v') then |
| 3635 | resource = RLIMIT_AS |
| 3636 | limit_name = 'virtual memory' |
| 3637 | i = i + 1 |
| 3638 | else if (len_trim(arg) == 3 .and. arg(1:1) == '-' .and. & |
| 3639 | (arg(2:2) == 'S' .or. arg(2:2) == 'H')) then |
| 3640 | ! Combined flags like -Sn, -Hn, -Ss, -Hs, etc. |
| 3641 | if (arg(2:2) == 'S') then |
| 3642 | set_soft = .true. |
| 3643 | set_hard = .false. |
| 3644 | else |
| 3645 | set_hard = .true. |
| 3646 | set_soft = .false. |
| 3647 | end if |
| 3648 | select case (arg(3:3)) |
| 3649 | case ('c'); resource = RLIMIT_CORE; limit_name = 'core file size' |
| 3650 | case ('d'); resource = RLIMIT_DATA; limit_name = 'data seg size' |
| 3651 | case ('f'); resource = RLIMIT_FSIZE; limit_name = 'file size' |
| 3652 | case ('l'); resource = RLIMIT_MEMLOCK; limit_name = 'max locked memory' |
| 3653 | case ('m'); resource = RLIMIT_RSS; limit_name = 'max memory size' |
| 3654 | case ('n'); resource = RLIMIT_NOFILE; limit_name = 'open files' |
| 3655 | case ('s'); resource = RLIMIT_STACK; limit_name = 'stack size' |
| 3656 | case ('t'); resource = RLIMIT_CPU; limit_name = 'cpu time' |
| 3657 | case ('u'); resource = RLIMIT_NPROC; limit_name = 'max user processes' |
| 3658 | case ('v'); resource = RLIMIT_AS; limit_name = 'virtual memory' |
| 3659 | case default |
| 3660 | write(error_unit, '(a)') 'ulimit: invalid option: ' // trim(arg) |
| 3661 | shell%last_exit_status = 1 |
| 3662 | return |
| 3663 | end select |
| 3664 | i = i + 1 |
| 3665 | else if (arg(1:1) == '-') then |
| 3666 | ! Unknown flag |
| 3667 | write(error_unit, '(a)') 'ulimit: invalid option: ' // trim(arg) |
| 3668 | shell%last_exit_status = 2 |
| 3669 | return |
| 3670 | else |
| 3671 | ! This is the value to set |
| 3672 | value_str = arg |
| 3673 | setting_value = .true. |
| 3674 | exit |
| 3675 | end if |
| 3676 | end do |
| 3677 | |
| 3678 | ! Display all limits if -a was specified |
| 3679 | if (show_all) then |
| 3680 | call display_all_limits(shell) |
| 3681 | return |
| 3682 | end if |
| 3683 | |
| 3684 | ! Get current limit |
| 3685 | ret = c_getrlimit(resource, rlim) |
| 3686 | if (ret /= 0) then |
| 3687 | write(error_unit, '(a)') 'ulimit: failed to get resource limit' |
| 3688 | shell%last_exit_status = 1 |
| 3689 | return |
| 3690 | end if |
| 3691 | |
| 3692 | ! If setting a new value |
| 3693 | if (setting_value) then |
| 3694 | ! Parse the new limit value |
| 3695 | if (trim(value_str) == 'unlimited') then |
| 3696 | new_limit = RLIM_INFINITY |
| 3697 | else |
| 3698 | read(value_str, *, iostat=ret) new_limit |
| 3699 | if (ret /= 0) then |
| 3700 | write(error_unit, '(a)') 'ulimit: invalid number: ' // trim(value_str) |
| 3701 | shell%last_exit_status = 1 |
| 3702 | return |
| 3703 | end if |
| 3704 | |
| 3705 | ! Convert based on resource type (some are in KB) |
| 3706 | if (resource == RLIMIT_FSIZE .or. resource == RLIMIT_CORE .or. & |
| 3707 | resource == RLIMIT_DATA .or. resource == RLIMIT_STACK .or. & |
| 3708 | resource == RLIMIT_RSS .or. resource == RLIMIT_MEMLOCK .or. & |
| 3709 | resource == RLIMIT_AS) then |
| 3710 | new_limit = new_limit * 1024 ! Convert KB to bytes |
| 3711 | end if |
| 3712 | end if |
| 3713 | |
| 3714 | ! Set the new limit |
| 3715 | if (set_hard) then |
| 3716 | rlim%rlim_max = new_limit |
| 3717 | else |
| 3718 | rlim%rlim_cur = new_limit |
| 3719 | end if |
| 3720 | |
| 3721 | ret = c_setrlimit(resource, rlim) |
| 3722 | if (ret /= 0) then |
| 3723 | write(error_unit, '(a)') 'ulimit: failed to set resource limit' |
| 3724 | shell%last_exit_status = 1 |
| 3725 | return |
| 3726 | end if |
| 3727 | else |
| 3728 | ! Display current limit |
| 3729 | if (set_hard) then |
| 3730 | call display_limit(rlim%rlim_max, resource) |
| 3731 | else |
| 3732 | call display_limit(rlim%rlim_cur, resource) |
| 3733 | end if |
| 3734 | end if |
| 3735 | |
| 3736 | shell%last_exit_status = 0 |
| 3737 | |
| 3738 | contains |
| 3739 | |
| 3740 | subroutine display_limit(limit_value, res) |
| 3741 | integer(c_long), intent(in) :: limit_value |
| 3742 | integer(c_int), intent(in) :: res |
| 3743 | integer(c_long) :: display_value |
| 3744 | |
| 3745 | ! Treat RLIM_INFINITY, negative values, and very large values as "unlimited". |
| 3746 | ! macOS returns large finite values (e.g. 2^63-1) instead of RLIM_INFINITY |
| 3747 | ! for some resources. Threshold: > 2^40 (~1 trillion) is effectively unlimited. |
| 3748 | if (limit_value == RLIM_INFINITY .or. limit_value < 0 .or. & |
| 3749 | limit_value > 1099511627776_c_long) then |
| 3750 | write(output_unit, '(a)') 'unlimited' |
| 3751 | else |
| 3752 | ! Convert bytes to KB for display |
| 3753 | if (res == RLIMIT_FSIZE .or. res == RLIMIT_CORE .or. & |
| 3754 | res == RLIMIT_DATA .or. res == RLIMIT_STACK .or. & |
| 3755 | res == RLIMIT_RSS .or. res == RLIMIT_MEMLOCK .or. & |
| 3756 | res == RLIMIT_AS) then |
| 3757 | display_value = limit_value / 1024 |
| 3758 | else |
| 3759 | display_value = limit_value |
| 3760 | end if |
| 3761 | write(output_unit, '(i0)') display_value |
| 3762 | end if |
| 3763 | end subroutine |
| 3764 | |
| 3765 | subroutine display_all_limits(sh) |
| 3766 | type(shell_state_t), intent(inout) :: sh |
| 3767 | |
| 3768 | write(output_unit, '(a)') 'core file size (blocks, -c) ' // get_limit_str(RLIMIT_CORE) |
| 3769 | write(output_unit, '(a)') 'data seg size (kbytes, -d) ' // get_limit_str(RLIMIT_DATA) |
| 3770 | write(output_unit, '(a)') 'file size (blocks, -f) ' // get_limit_str(RLIMIT_FSIZE) |
| 3771 | write(output_unit, '(a)') 'max locked memory (kbytes, -l) ' // get_limit_str(RLIMIT_MEMLOCK) |
| 3772 | write(output_unit, '(a)') 'max memory size (kbytes, -m) ' // get_limit_str(RLIMIT_RSS) |
| 3773 | write(output_unit, '(a)') 'open files (-n) ' // get_limit_str(RLIMIT_NOFILE) |
| 3774 | write(output_unit, '(a)') 'stack size (kbytes, -s) ' // get_limit_str(RLIMIT_STACK) |
| 3775 | write(output_unit, '(a)') 'cpu time (seconds,-t) ' // get_limit_str(RLIMIT_CPU) |
| 3776 | write(output_unit, '(a)') 'max user processes (-u) ' // get_limit_str(RLIMIT_NPROC) |
| 3777 | write(output_unit, '(a)') 'virtual memory (kbytes, -v) ' // get_limit_str(RLIMIT_AS) |
| 3778 | |
| 3779 | sh%last_exit_status = 0 |
| 3780 | end subroutine |
| 3781 | |
| 3782 | function get_limit_str(res) result(str) |
| 3783 | integer(c_int), intent(in) :: res |
| 3784 | character(len=20) :: str |
| 3785 | type(rlimit_t) :: r |
| 3786 | integer :: res_ret |
| 3787 | integer(c_long) :: val |
| 3788 | |
| 3789 | res_ret = c_getrlimit(res, r) |
| 3790 | if (res_ret /= 0) then |
| 3791 | str = 'error' |
| 3792 | return |
| 3793 | end if |
| 3794 | |
| 3795 | if (r%rlim_cur == RLIM_INFINITY .or. r%rlim_cur < 0 .or. & |
| 3796 | r%rlim_cur > 1099511627776_c_long) then |
| 3797 | str = 'unlimited' |
| 3798 | else |
| 3799 | ! Convert to appropriate units |
| 3800 | if (res == RLIMIT_FSIZE .or. res == RLIMIT_CORE .or. & |
| 3801 | res == RLIMIT_DATA .or. res == RLIMIT_STACK .or. & |
| 3802 | res == RLIMIT_RSS .or. res == RLIMIT_MEMLOCK .or. & |
| 3803 | res == RLIMIT_AS) then |
| 3804 | val = r%rlim_cur / 1024 |
| 3805 | else |
| 3806 | val = r%rlim_cur |
| 3807 | end if |
| 3808 | write(str, '(i20)') val |
| 3809 | str = adjustl(str) |
| 3810 | end if |
| 3811 | end function |
| 3812 | |
| 3813 | end subroutine |
| 3814 | |
| 3815 | subroutine builtin_times(cmd, shell) |
| 3816 | type(command_t), intent(in) :: cmd |
| 3817 | type(shell_state_t), intent(inout) :: shell |
| 3818 | type(rusage_t) :: self_usage, children_usage |
| 3819 | integer :: ret |
| 3820 | real :: self_user_sec, self_sys_sec, children_user_sec, children_sys_sec |
| 3821 | integer :: self_user_min, self_sys_min, children_user_min, children_sys_min |
| 3822 | |
| 3823 | if (.false.) print *, cmd%num_tokens ! Silence unused warning |
| 3824 | |
| 3825 | ! Get resource usage for the shell itself |
| 3826 | ret = c_getrusage(RUSAGE_SELF, self_usage) |
| 3827 | if (ret /= 0) then |
| 3828 | write(error_unit, '(a)') 'times: failed to get resource usage' |
| 3829 | shell%last_exit_status = 1 |
| 3830 | return |
| 3831 | end if |
| 3832 | |
| 3833 | ! Get resource usage for all children |
| 3834 | ret = c_getrusage(RUSAGE_CHILDREN, children_usage) |
| 3835 | if (ret /= 0) then |
| 3836 | write(error_unit, '(a)') 'times: failed to get child resource usage' |
| 3837 | shell%last_exit_status = 1 |
| 3838 | return |
| 3839 | end if |
| 3840 | |
| 3841 | ! Convert timeval structures to seconds (tv_sec + tv_usec/1000000) |
| 3842 | self_user_sec = real(self_usage%ru_utime%tv_sec) + real(self_usage%ru_utime%tv_usec) / 1000000.0 |
| 3843 | self_sys_sec = real(self_usage%ru_stime%tv_sec) + real(self_usage%ru_stime%tv_usec) / 1000000.0 |
| 3844 | children_user_sec = real(children_usage%ru_utime%tv_sec) + real(children_usage%ru_utime%tv_usec) / 1000000.0 |
| 3845 | children_sys_sec = real(children_usage%ru_stime%tv_sec) + real(children_usage%ru_stime%tv_usec) / 1000000.0 |
| 3846 | |
| 3847 | ! Extract minutes and seconds |
| 3848 | self_user_min = int(self_user_sec / 60.0) |
| 3849 | self_user_sec = self_user_sec - (self_user_min * 60.0) |
| 3850 | self_sys_min = int(self_sys_sec / 60.0) |
| 3851 | self_sys_sec = self_sys_sec - (self_sys_min * 60.0) |
| 3852 | children_user_min = int(children_user_sec / 60.0) |
| 3853 | children_user_sec = children_user_sec - (children_user_min * 60.0) |
| 3854 | children_sys_min = int(children_sys_sec / 60.0) |
| 3855 | children_sys_sec = children_sys_sec - (children_sys_min * 60.0) |
| 3856 | |
| 3857 | ! Print in bash format: user_time system_time (one line for shell, one for children) |
| 3858 | write(output_unit, '(i0,a,f5.3,a,1x,i0,a,f5.3,a)') & |
| 3859 | self_user_min, 'm', self_user_sec, 's', & |
| 3860 | self_sys_min, 'm', self_sys_sec, 's' |
| 3861 | write(output_unit, '(i0,a,f5.3,a,1x,i0,a,f5.3,a)') & |
| 3862 | children_user_min, 'm', children_user_sec, 's', & |
| 3863 | children_sys_min, 'm', children_sys_sec, 's' |
| 3864 | |
| 3865 | shell%last_exit_status = 0 |
| 3866 | end subroutine |
| 3867 | |
| 3868 | subroutine builtin_let(cmd, shell) |
| 3869 | use expansion, only: arithmetic_expansion_shell |
| 3870 | type(command_t), intent(in) :: cmd |
| 3871 | type(shell_state_t), intent(inout) :: shell |
| 3872 | integer :: i, iostat |
| 3873 | character(len=:), allocatable :: expr, arith_expr, result_str |
| 3874 | integer(kind=8) :: result_val |
| 3875 | |
| 3876 | ! Default to success |
| 3877 | shell%last_exit_status = 0 |
| 3878 | |
| 3879 | ! Process each argument as an arithmetic expression |
| 3880 | do i = 2, cmd%num_tokens |
| 3881 | ! Build arithmetic expression - remove quotes if present |
| 3882 | expr = trim(cmd%tokens(i)) |
| 3883 | if (len_trim(expr) > 0) then |
| 3884 | if (expr(1:1) == '"' .and. expr(len_trim(expr):len_trim(expr)) == '"') then |
| 3885 | expr = expr(2:len_trim(expr)-1) |
| 3886 | else if (expr(1:1) == "'" .and. expr(len_trim(expr):len_trim(expr)) == "'") then |
| 3887 | expr = expr(2:len_trim(expr)-1) |
| 3888 | end if |
| 3889 | end if |
| 3890 | |
| 3891 | ! Evaluate as $((expression)) |
| 3892 | arith_expr = '$((' // trim(expr) // '))' |
| 3893 | result_str = arithmetic_expansion_shell(trim(arith_expr), shell) |
| 3894 | |
| 3895 | ! Convert to integer to check result |
| 3896 | read(result_str, *, iostat=iostat) result_val |
| 3897 | if (iostat /= 0) result_val = 0 |
| 3898 | |
| 3899 | ! Set exit status based on last expression result |
| 3900 | ! Exit status 0 if non-zero, 1 if zero |
| 3901 | if (result_val /= 0) then |
| 3902 | shell%last_exit_status = 0 |
| 3903 | else |
| 3904 | shell%last_exit_status = 1 |
| 3905 | end if |
| 3906 | end do |
| 3907 | end subroutine |
| 3908 | |
| 3909 | subroutine builtin_declare(cmd, shell) |
| 3910 | use variables, only: set_shell_variable, declare_associative_array |
| 3911 | type(command_t), intent(in) :: cmd |
| 3912 | type(shell_state_t), intent(inout) :: shell |
| 3913 | integer :: eq_pos, i, j, arg_idx |
| 3914 | character(len=256) :: var_name |
| 3915 | character(len=:), allocatable :: var_value |
| 3916 | logical :: readonly_flag, export_flag, print_mode, print_funcs |
| 3917 | logical :: array_flag, assoc_array_flag, found, integer_flag, global_flag |
| 3918 | character(len=MAX_TOKEN_LEN) :: flag_str |
| 3919 | integer :: fi |
| 3920 | |
| 3921 | readonly_flag = .false. |
| 3922 | export_flag = .false. |
| 3923 | print_mode = .false. |
| 3924 | print_funcs = .false. |
| 3925 | array_flag = .false. |
| 3926 | assoc_array_flag = .false. |
| 3927 | integer_flag = .false. |
| 3928 | global_flag = .false. |
| 3929 | |
| 3930 | if (cmd%num_tokens < 2) then |
| 3931 | ! No arguments: print all variables |
| 3932 | print_mode = .true. |
| 3933 | end if |
| 3934 | |
| 3935 | ! Parse options (supports combined flags like -ix, -ri, -rxi) |
| 3936 | arg_idx = 2 |
| 3937 | do while (arg_idx <= cmd%num_tokens) |
| 3938 | if (cmd%tokens(arg_idx)(1:1) == '-' .and. len_trim(cmd%tokens(arg_idx)) >= 2 .and. & |
| 3939 | cmd%tokens(arg_idx)(2:2) /= '-') then |
| 3940 | flag_str = trim(cmd%tokens(arg_idx)) |
| 3941 | do fi = 2, len_trim(flag_str) |
| 3942 | select case (flag_str(fi:fi)) |
| 3943 | case ('r') |
| 3944 | readonly_flag = .true. |
| 3945 | case ('x') |
| 3946 | export_flag = .true. |
| 3947 | case ('p') |
| 3948 | print_mode = .true. |
| 3949 | case ('f') |
| 3950 | print_funcs = .true. |
| 3951 | print_mode = .true. |
| 3952 | case ('a') |
| 3953 | array_flag = .true. |
| 3954 | case ('A') |
| 3955 | assoc_array_flag = .true. |
| 3956 | case ('i') |
| 3957 | integer_flag = .true. |
| 3958 | case ('g') |
| 3959 | global_flag = .true. |
| 3960 | case default |
| 3961 | write(error_unit, '(a)') 'declare: invalid option: ' // trim(cmd%tokens(arg_idx)) |
| 3962 | shell%last_exit_status = 1 |
| 3963 | return |
| 3964 | end select |
| 3965 | end do |
| 3966 | arg_idx = arg_idx + 1 |
| 3967 | else if (trim(cmd%tokens(arg_idx)) == '--') then |
| 3968 | arg_idx = arg_idx + 1 |
| 3969 | exit |
| 3970 | else |
| 3971 | exit |
| 3972 | end if |
| 3973 | end do |
| 3974 | |
| 3975 | if (print_mode) then |
| 3976 | ! Print functions if -f flag is set |
| 3977 | if (print_funcs) then |
| 3978 | do i = 1, shell%num_functions |
| 3979 | if (len_trim(shell%functions(i)%name) > 0 .and. shell%functions(i)%body_lines > 0) then |
| 3980 | write(output_unit, '(a)') trim(shell%functions(i)%name) // ' ()' |
| 3981 | write(output_unit, '(a)') '{' |
| 3982 | if (allocated(shell%functions(i)%body)) then |
| 3983 | do j = 1, shell%functions(i)%body_lines |
| 3984 | if (allocated(shell%functions(i)%body(j)%str)) then |
| 3985 | write(output_unit, '(a)') ' ' // trim(shell%functions(i)%body(j)%str) |
| 3986 | end if |
| 3987 | end do |
| 3988 | end if |
| 3989 | write(output_unit, '(a)') '}' |
| 3990 | end if |
| 3991 | end do |
| 3992 | shell%last_exit_status = 0 |
| 3993 | return |
| 3994 | end if |
| 3995 | |
| 3996 | ! Print variables with declare syntax |
| 3997 | if (arg_idx <= cmd%num_tokens) then |
| 3998 | ! Print specific named variables |
| 3999 | do j = arg_idx, cmd%num_tokens |
| 4000 | var_name = trim(cmd%tokens(j)) |
| 4001 | found = .false. |
| 4002 | do i = 1, shell%num_variables |
| 4003 | if (trim(shell%variables(i)%name) == var_name) then |
| 4004 | block |
| 4005 | character(len=16) :: flags |
| 4006 | flags = '-' |
| 4007 | if (shell%variables(i)%is_integer) flags = trim(flags) // 'i' |
| 4008 | if (shell%variables(i)%readonly) flags = trim(flags) // 'r' |
| 4009 | if (shell%variables(i)%exported) flags = trim(flags) // 'x' |
| 4010 | if (flags == '-') flags = '--' |
| 4011 | write(output_unit, '(a)') 'declare ' // trim(flags) // ' ' // & |
| 4012 | trim(shell%variables(i)%name) // '="' // trim(shell%variables(i)%value) // '"' |
| 4013 | end block |
| 4014 | found = .true. |
| 4015 | exit |
| 4016 | end if |
| 4017 | end do |
| 4018 | if (.not. found) then |
| 4019 | write(error_unit, '(a)') 'declare: ' // trim(var_name) // ': not found' |
| 4020 | shell%last_exit_status = 1 |
| 4021 | end if |
| 4022 | end do |
| 4023 | else |
| 4024 | ! Print all variables |
| 4025 | do i = 1, shell%num_variables |
| 4026 | if (len_trim(shell%variables(i)%name) > 0) then |
| 4027 | block |
| 4028 | character(len=16) :: flags |
| 4029 | flags = '-' |
| 4030 | if (shell%variables(i)%is_integer) flags = trim(flags) // 'i' |
| 4031 | if (shell%variables(i)%readonly) flags = trim(flags) // 'r' |
| 4032 | if (shell%variables(i)%exported) flags = trim(flags) // 'x' |
| 4033 | if (flags == '-') flags = '--' |
| 4034 | write(output_unit, '(a)') 'declare ' // trim(flags) // ' ' // & |
| 4035 | trim(shell%variables(i)%name) // '="' // trim(shell%variables(i)%value) // '"' |
| 4036 | end block |
| 4037 | end if |
| 4038 | end do |
| 4039 | end if |
| 4040 | shell%last_exit_status = 0 |
| 4041 | return |
| 4042 | end if |
| 4043 | |
| 4044 | ! Process variable assignments |
| 4045 | do while (arg_idx <= cmd%num_tokens) |
| 4046 | eq_pos = index(cmd%tokens(arg_idx), '=') |
| 4047 | |
| 4048 | if (eq_pos > 0) then |
| 4049 | ! VAR=value form |
| 4050 | var_name = cmd%tokens(arg_idx)(:eq_pos-1) |
| 4051 | var_value = cmd%tokens(arg_idx)(eq_pos+1:) |
| 4052 | |
| 4053 | ! Check if variable already exists and is readonly |
| 4054 | found = .false. |
| 4055 | do j = 1, shell%num_variables |
| 4056 | if (trim(shell%variables(j)%name) == trim(var_name)) then |
| 4057 | if (shell%variables(j)%readonly .and. .not. readonly_flag) then |
| 4058 | write(error_unit, '(a)') trim(var_name) // ': readonly variable' |
| 4059 | shell%last_exit_status = 1 |
| 4060 | return |
| 4061 | end if |
| 4062 | found = .true. |
| 4063 | exit |
| 4064 | end if |
| 4065 | end do |
| 4066 | |
| 4067 | ! Handle array initialization: declare -a arr=(a b c) |
| 4068 | if (array_flag .and. len_trim(var_value) > 0 .and. & |
| 4069 | var_value(1:1) == '(') then |
| 4070 | block |
| 4071 | use variables, only: set_array_variable |
| 4072 | character(len=256) :: arr_elems(100) |
| 4073 | integer :: num_elems, k, elem_start |
| 4074 | character(len=:), allocatable :: content |
| 4075 | ! Strip parentheses |
| 4076 | content = trim(var_value) |
| 4077 | if (content(len(content):len(content)) == ')') then |
| 4078 | content = content(2:len(content)-1) |
| 4079 | else |
| 4080 | content = content(2:) |
| 4081 | end if |
| 4082 | ! Split on spaces |
| 4083 | num_elems = 0 |
| 4084 | elem_start = 1 |
| 4085 | do k = 1, len_trim(content) |
| 4086 | if (content(k:k) == ' ') then |
| 4087 | if (k > elem_start) then |
| 4088 | num_elems = num_elems + 1 |
| 4089 | arr_elems(num_elems) = content(elem_start:k-1) |
| 4090 | end if |
| 4091 | elem_start = k + 1 |
| 4092 | end if |
| 4093 | end do |
| 4094 | if (elem_start <= len_trim(content)) then |
| 4095 | num_elems = num_elems + 1 |
| 4096 | arr_elems(num_elems) = & |
| 4097 | content(elem_start:len_trim(content)) |
| 4098 | end if |
| 4099 | call set_array_variable(shell, trim(var_name), & |
| 4100 | arr_elems, num_elems) |
| 4101 | end block |
| 4102 | arg_idx = arg_idx + 1 |
| 4103 | cycle |
| 4104 | end if |
| 4105 | |
| 4106 | ! Evaluate arithmetic if integer flag is set |
| 4107 | if (integer_flag .and. len_trim(var_value) > 0) then |
| 4108 | block |
| 4109 | use expansion, only: arithmetic_expansion_shell |
| 4110 | character(len=:), allocatable :: arith_expr, arith_result |
| 4111 | arith_expr = '$((' // trim(var_value) // '))' |
| 4112 | arith_result = trim(arithmetic_expansion_shell( & |
| 4113 | trim(arith_expr), shell)) |
| 4114 | var_value = arith_result |
| 4115 | end block |
| 4116 | end if |
| 4117 | |
| 4118 | ! Set the variable — inside functions without -g, use local scope |
| 4119 | if (shell%function_depth > 0 .and. .not. global_flag) then |
| 4120 | block |
| 4121 | integer :: lv_depth, lv_idx |
| 4122 | lv_depth = shell%function_depth |
| 4123 | if (lv_depth <= size(shell%local_var_counts)) then |
| 4124 | ! Check if already exists locally |
| 4125 | lv_idx = 0 |
| 4126 | do j = 1, shell%local_var_counts(lv_depth) |
| 4127 | if (trim(shell%local_vars(lv_depth, j)%name) == trim(var_name)) then |
| 4128 | lv_idx = j |
| 4129 | exit |
| 4130 | end if |
| 4131 | end do |
| 4132 | if (lv_idx == 0) then |
| 4133 | lv_idx = shell%local_var_counts(lv_depth) + 1 |
| 4134 | if (lv_idx <= size(shell%local_vars, 2)) then |
| 4135 | shell%local_var_counts(lv_depth) = lv_idx |
| 4136 | end if |
| 4137 | end if |
| 4138 | if (lv_idx <= size(shell%local_vars, 2)) then |
| 4139 | shell%local_vars(lv_depth, lv_idx)%name = var_name |
| 4140 | shell%local_vars(lv_depth, lv_idx)%value = trim(var_value) |
| 4141 | shell%local_vars(lv_depth, lv_idx)%readonly = readonly_flag |
| 4142 | shell%local_vars(lv_depth, lv_idx)%exported = export_flag |
| 4143 | shell%local_vars(lv_depth, lv_idx)%is_integer = integer_flag |
| 4144 | end if |
| 4145 | end if |
| 4146 | end block |
| 4147 | if (export_flag) then |
| 4148 | if (.not. set_environment_var(trim(var_name), trim(var_value))) then |
| 4149 | write(error_unit, '(a)') 'declare: failed to export variable' |
| 4150 | shell%last_exit_status = 1 |
| 4151 | return |
| 4152 | end if |
| 4153 | end if |
| 4154 | else |
| 4155 | call set_shell_variable(shell, trim(var_name), & |
| 4156 | trim(var_value)) |
| 4157 | |
| 4158 | ! Apply attributes |
| 4159 | do j = 1, shell%num_variables |
| 4160 | if (trim(shell%variables(j)%name) == trim(var_name)) then |
| 4161 | if (readonly_flag) shell%variables(j)%readonly = .true. |
| 4162 | if (integer_flag) shell%variables(j)%is_integer = .true. |
| 4163 | if (export_flag) then |
| 4164 | shell%variables(j)%exported = .true. |
| 4165 | if (.not. set_environment_var(trim(var_name), trim(var_value))) then |
| 4166 | write(error_unit, '(a)') 'declare: failed to export variable' |
| 4167 | shell%last_exit_status = 1 |
| 4168 | return |
| 4169 | end if |
| 4170 | end if |
| 4171 | exit |
| 4172 | end if |
| 4173 | end do |
| 4174 | end if |
| 4175 | else |
| 4176 | ! Just VAR - declare variable or apply attributes |
| 4177 | var_name = trim(cmd%tokens(arg_idx)) |
| 4178 | found = .false. |
| 4179 | |
| 4180 | ! Handle array declarations |
| 4181 | if (assoc_array_flag) then |
| 4182 | ! declare -A arrayname |
| 4183 | call declare_associative_array(shell, var_name) |
| 4184 | arg_idx = arg_idx + 1 |
| 4185 | cycle |
| 4186 | else if (array_flag) then |
| 4187 | ! declare -a arrayname |
| 4188 | ! Create an empty indexed array |
| 4189 | call set_shell_variable(shell, var_name, '') |
| 4190 | do j = 1, shell%num_variables |
| 4191 | if (trim(shell%variables(j)%name) == var_name) then |
| 4192 | shell%variables(j)%is_array = .true. |
| 4193 | exit |
| 4194 | end if |
| 4195 | end do |
| 4196 | arg_idx = arg_idx + 1 |
| 4197 | cycle |
| 4198 | end if |
| 4199 | |
| 4200 | do j = 1, shell%num_variables |
| 4201 | if (trim(shell%variables(j)%name) == var_name) then |
| 4202 | if (readonly_flag) shell%variables(j)%readonly = .true. |
| 4203 | if (integer_flag) shell%variables(j)%is_integer = .true. |
| 4204 | if (export_flag) then |
| 4205 | shell%variables(j)%exported = .true. |
| 4206 | if (.not. set_environment_var(var_name, & |
| 4207 | trim(shell%variables(j)%value))) then |
| 4208 | write(error_unit, '(a)') & |
| 4209 | 'declare: failed to export variable' |
| 4210 | shell%last_exit_status = 1 |
| 4211 | return |
| 4212 | end if |
| 4213 | end if |
| 4214 | found = .true. |
| 4215 | exit |
| 4216 | end if |
| 4217 | end do |
| 4218 | |
| 4219 | if (.not. found) then |
| 4220 | ! Variable doesn't exist, create it with empty value |
| 4221 | call set_shell_variable(shell, var_name, '') |
| 4222 | do j = 1, shell%num_variables |
| 4223 | if (trim(shell%variables(j)%name) == var_name) then |
| 4224 | if (readonly_flag) & |
| 4225 | shell%variables(j)%readonly = .true. |
| 4226 | if (integer_flag) & |
| 4227 | shell%variables(j)%is_integer = .true. |
| 4228 | if (export_flag) then |
| 4229 | shell%variables(j)%exported = .true. |
| 4230 | if (.not. set_environment_var(var_name, & |
| 4231 | '')) then |
| 4232 | write(error_unit, '(a)') & |
| 4233 | 'declare: failed to export variable' |
| 4234 | shell%last_exit_status = 1 |
| 4235 | return |
| 4236 | end if |
| 4237 | end if |
| 4238 | exit |
| 4239 | end if |
| 4240 | end do |
| 4241 | end if |
| 4242 | end if |
| 4243 | |
| 4244 | arg_idx = arg_idx + 1 |
| 4245 | end do |
| 4246 | |
| 4247 | shell%last_exit_status = 0 |
| 4248 | end subroutine |
| 4249 | |
| 4250 | subroutine builtin_printenv(cmd, shell) |
| 4251 | use system_interface, only: get_environ_entry |
| 4252 | type(command_t), intent(in) :: cmd |
| 4253 | type(shell_state_t), intent(inout) :: shell |
| 4254 | integer :: i |
| 4255 | #ifdef USE_MEMORY_POOL |
| 4256 | type(string_ref) :: env_value_ref |
| 4257 | character(len=:), allocatable :: temp_str |
| 4258 | #else |
| 4259 | character(len=:), allocatable :: env_value |
| 4260 | #endif |
| 4261 | character(len=:), allocatable :: env_entry |
| 4262 | |
| 4263 | if (cmd%num_tokens < 2) then |
| 4264 | ! No arguments: print all environment variables |
| 4265 | i = 0 |
| 4266 | do |
| 4267 | env_entry = get_environ_entry(i) |
| 4268 | if (.not. allocated(env_entry) .or. len(env_entry) == 0) exit |
| 4269 | write(output_unit, '(a)') trim(env_entry) |
| 4270 | if (allocated(env_entry)) deallocate(env_entry) |
| 4271 | i = i + 1 |
| 4272 | end do |
| 4273 | shell%last_exit_status = 0 |
| 4274 | else |
| 4275 | ! Print specific environment variable(s) |
| 4276 | #ifdef USE_MEMORY_POOL |
| 4277 | env_value_ref = pool_get_string(1024) |
| 4278 | call dashboard_track_allocation(MOD_BUILTINS, 1024, 3) |
| 4279 | #endif |
| 4280 | shell%last_exit_status = 0 |
| 4281 | do i = 2, cmd%num_tokens |
| 4282 | #ifdef USE_MEMORY_POOL |
| 4283 | temp_str = get_environment_var(trim(cmd%tokens(i))) |
| 4284 | if (allocated(temp_str) .and. len(temp_str) > 0) then |
| 4285 | env_value_ref%data = temp_str |
| 4286 | write(output_unit, '(a)') trim(env_value_ref%data) |
| 4287 | else |
| 4288 | shell%last_exit_status = 1 |
| 4289 | end if |
| 4290 | if (allocated(temp_str)) deallocate(temp_str) |
| 4291 | #else |
| 4292 | env_value = get_environment_var(trim(cmd%tokens(i))) |
| 4293 | if (allocated(env_value) .and. len(env_value) > 0) then |
| 4294 | write(output_unit, '(a)') env_value |
| 4295 | else |
| 4296 | shell%last_exit_status = 1 |
| 4297 | end if |
| 4298 | #endif |
| 4299 | end do |
| 4300 | #ifdef USE_MEMORY_POOL |
| 4301 | call pool_release_string(env_value_ref) |
| 4302 | call dashboard_track_deallocation(MOD_BUILTINS, 1024, 3) |
| 4303 | #endif |
| 4304 | end if |
| 4305 | end subroutine |
| 4306 | |
| 4307 | subroutine builtin_fc(cmd, shell) |
| 4308 | type(command_t), intent(in) :: cmd |
| 4309 | type(shell_state_t), intent(inout) :: shell |
| 4310 | logical :: list_mode, no_line_numbers, reverse_order, subst_mode |
| 4311 | character(len=:), allocatable :: editor, old_str, new_str |
| 4312 | character(len=:), allocatable :: line, tmpfile, edit_cmd |
| 4313 | character(len=40) :: fmt_buf |
| 4314 | integer :: first, last, i, arg_idx, iostat, tmp_unit |
| 4315 | integer :: eq_pos, history_count |
| 4316 | logical :: found |
| 4317 | |
| 4318 | ! Pre-allocate line for intent(out) calls and Fortran read |
| 4319 | allocate(character(len=4096) :: line) |
| 4320 | |
| 4321 | ! Initialize flags |
| 4322 | list_mode = .false. |
| 4323 | no_line_numbers = .false. |
| 4324 | reverse_order = .false. |
| 4325 | subst_mode = .false. |
| 4326 | editor = '' |
| 4327 | first = -1 |
| 4328 | last = -1 |
| 4329 | arg_idx = 2 |
| 4330 | |
| 4331 | ! Get history count |
| 4332 | history_count = get_history_count() |
| 4333 | |
| 4334 | ! Parse options |
| 4335 | do while (arg_idx <= cmd%num_tokens) |
| 4336 | if (cmd%tokens(arg_idx)(1:1) == '-') then |
| 4337 | select case(trim(cmd%tokens(arg_idx))) |
| 4338 | case('-l') |
| 4339 | list_mode = .true. |
| 4340 | arg_idx = arg_idx + 1 |
| 4341 | case('-n') |
| 4342 | no_line_numbers = .true. |
| 4343 | arg_idx = arg_idx + 1 |
| 4344 | case('-r') |
| 4345 | reverse_order = .true. |
| 4346 | arg_idx = arg_idx + 1 |
| 4347 | case('-e') |
| 4348 | ! Next argument is editor name |
| 4349 | if (arg_idx + 1 > cmd%num_tokens) then |
| 4350 | write(error_unit, '(a)') 'fc: -e requires an argument' |
| 4351 | shell%last_exit_status = 1 |
| 4352 | return |
| 4353 | end if |
| 4354 | editor = trim(cmd%tokens(arg_idx + 1)) |
| 4355 | arg_idx = arg_idx + 2 |
| 4356 | case('-s') |
| 4357 | subst_mode = .true. |
| 4358 | arg_idx = arg_idx + 1 |
| 4359 | case default |
| 4360 | write(error_unit, '(a)') 'fc: invalid option: ' // trim(cmd%tokens(arg_idx)) |
| 4361 | shell%last_exit_status = 1 |
| 4362 | return |
| 4363 | end select |
| 4364 | else |
| 4365 | exit ! Done with options |
| 4366 | end if |
| 4367 | end do |
| 4368 | |
| 4369 | ! Parse range arguments [first] [last] (skip for -s mode) |
| 4370 | if (.not. subst_mode .and. arg_idx <= cmd%num_tokens) then |
| 4371 | ! Parse first |
| 4372 | if (cmd%tokens(arg_idx)(1:1) == '-') then |
| 4373 | ! Negative offset from end |
| 4374 | read(cmd%tokens(arg_idx), *, iostat=iostat) first |
| 4375 | if (iostat == 0) first = history_count + first + 1 |
| 4376 | else |
| 4377 | ! Try to parse as number |
| 4378 | read(cmd%tokens(arg_idx), *, iostat=iostat) first |
| 4379 | if (iostat /= 0) then |
| 4380 | ! Not a number, search for command starting with this string |
| 4381 | first = find_history_by_prefix(trim(cmd%tokens(arg_idx))) |
| 4382 | if (first < 0) then |
| 4383 | write(error_unit, '(a)') 'fc: ' // trim(cmd%tokens(arg_idx)) // ': event not found' |
| 4384 | shell%last_exit_status = 1 |
| 4385 | return |
| 4386 | end if |
| 4387 | end if |
| 4388 | end if |
| 4389 | arg_idx = arg_idx + 1 |
| 4390 | end if |
| 4391 | |
| 4392 | if (.not. subst_mode .and. arg_idx <= cmd%num_tokens) then |
| 4393 | ! Parse last |
| 4394 | if (cmd%tokens(arg_idx)(1:1) == '-') then |
| 4395 | read(cmd%tokens(arg_idx), *, iostat=iostat) last |
| 4396 | if (iostat == 0) last = history_count + last + 1 |
| 4397 | else |
| 4398 | read(cmd%tokens(arg_idx), *, iostat=iostat) last |
| 4399 | if (iostat /= 0) then |
| 4400 | last = find_history_by_prefix(trim(cmd%tokens(arg_idx))) |
| 4401 | if (last < 0) then |
| 4402 | write(error_unit, '(a)') 'fc: ' // trim(cmd%tokens(arg_idx)) // ': event not found' |
| 4403 | shell%last_exit_status = 1 |
| 4404 | return |
| 4405 | end if |
| 4406 | end if |
| 4407 | end if |
| 4408 | end if |
| 4409 | |
| 4410 | ! Handle empty history - list mode succeeds silently, other modes fail |
| 4411 | if (history_count == 0) then |
| 4412 | if (list_mode) then |
| 4413 | shell%last_exit_status = 0 |
| 4414 | else |
| 4415 | write(error_unit, '(a)') 'fc: no commands in history' |
| 4416 | shell%last_exit_status = 1 |
| 4417 | end if |
| 4418 | return |
| 4419 | end if |
| 4420 | |
| 4421 | ! Set defaults if not specified |
| 4422 | if (first < 0) then |
| 4423 | if (list_mode) then |
| 4424 | first = max(1, history_count - 15) ! Show last 16 commands by default |
| 4425 | else if (subst_mode) then |
| 4426 | first = max(1, history_count - 1) ! Get command before fc itself |
| 4427 | else |
| 4428 | first = history_count ! Edit last command |
| 4429 | end if |
| 4430 | end if |
| 4431 | |
| 4432 | if (last < 0) then |
| 4433 | if (list_mode) then |
| 4434 | last = history_count |
| 4435 | else |
| 4436 | last = first ! Edit single command |
| 4437 | end if |
| 4438 | end if |
| 4439 | |
| 4440 | ! Validate range |
| 4441 | if (first < 1) first = 1 |
| 4442 | if (last > history_count) last = history_count |
| 4443 | if (first > last .and. .not. reverse_order) then |
| 4444 | ! Swap if needed |
| 4445 | i = first |
| 4446 | first = last |
| 4447 | last = i |
| 4448 | end if |
| 4449 | |
| 4450 | ! Handle -s (substitution mode) |
| 4451 | if (subst_mode) then |
| 4452 | ! fc -s [old=new] [command] |
| 4453 | ! Parse old=new substitution |
| 4454 | old_str = '' |
| 4455 | new_str = '' |
| 4456 | |
| 4457 | if (arg_idx <= cmd%num_tokens) then |
| 4458 | eq_pos = index(cmd%tokens(arg_idx), '=') |
| 4459 | if (eq_pos > 0) then |
| 4460 | old_str = cmd%tokens(arg_idx)(:eq_pos-1) |
| 4461 | new_str = cmd%tokens(arg_idx)(eq_pos+1:) |
| 4462 | arg_idx = arg_idx + 1 |
| 4463 | end if |
| 4464 | end if |
| 4465 | |
| 4466 | ! Get the command to re-execute |
| 4467 | call get_history_line(first, line, found) |
| 4468 | if (.not. found) then |
| 4469 | write(error_unit, '(a)') 'fc: history entry not found' |
| 4470 | shell%last_exit_status = 1 |
| 4471 | return |
| 4472 | end if |
| 4473 | |
| 4474 | ! Perform substitution if requested |
| 4475 | if (len_trim(old_str) > 0) then |
| 4476 | i = index(line, trim(old_str)) |
| 4477 | if (i > 0) then |
| 4478 | line = line(:i-1) // trim(new_str) // line(i+len_trim(old_str):) |
| 4479 | else |
| 4480 | write(error_unit, '(a)') 'fc: substitution failed' |
| 4481 | shell%last_exit_status = 1 |
| 4482 | return |
| 4483 | end if |
| 4484 | end if |
| 4485 | |
| 4486 | ! Print the command being executed |
| 4487 | write(output_unit, '(a)') trim(line) |
| 4488 | |
| 4489 | ! Execute using c_system |
| 4490 | shell%last_exit_status = c_system(trim(line) // c_null_char) |
| 4491 | |
| 4492 | return |
| 4493 | end if |
| 4494 | |
| 4495 | ! Handle -l (list mode) |
| 4496 | if (list_mode) then |
| 4497 | if (reverse_order) then |
| 4498 | do i = last, first, -1 |
| 4499 | call get_history_line(i, line, found) |
| 4500 | if (found) then |
| 4501 | if (no_line_numbers) then |
| 4502 | write(output_unit, '(a)') trim(line) |
| 4503 | else |
| 4504 | write(output_unit, '(i5,2x,a)') i, trim(line) |
| 4505 | end if |
| 4506 | end if |
| 4507 | end do |
| 4508 | else |
| 4509 | do i = first, last |
| 4510 | call get_history_line(i, line, found) |
| 4511 | if (found) then |
| 4512 | if (no_line_numbers) then |
| 4513 | write(output_unit, '(a)') trim(line) |
| 4514 | else |
| 4515 | write(output_unit, '(i5,2x,a)') i, trim(line) |
| 4516 | end if |
| 4517 | end if |
| 4518 | end do |
| 4519 | end if |
| 4520 | shell%last_exit_status = 0 |
| 4521 | return |
| 4522 | end if |
| 4523 | |
| 4524 | ! Handle edit mode (default) |
| 4525 | ! Determine editor to use |
| 4526 | if (len_trim(editor) == 0) then |
| 4527 | editor = get_environment_var('FCEDIT') |
| 4528 | if (len_trim(editor) == 0) then |
| 4529 | editor = get_environment_var('EDITOR') |
| 4530 | if (len_trim(editor) == 0) then |
| 4531 | editor = 'vi' ! Default to vi |
| 4532 | end if |
| 4533 | end if |
| 4534 | end if |
| 4535 | |
| 4536 | ! Create temporary file with commands to edit |
| 4537 | write(fmt_buf, '(a,i15)') '/tmp/fortsh_fc_', c_getpid() |
| 4538 | tmpfile = trim(adjustl(fmt_buf)) |
| 4539 | |
| 4540 | open(newunit=tmp_unit, file=trim(tmpfile), status='replace', action='write', iostat=iostat) |
| 4541 | if (iostat /= 0) then |
| 4542 | write(error_unit, '(a)') 'fc: failed to create temporary file' |
| 4543 | shell%last_exit_status = 1 |
| 4544 | return |
| 4545 | end if |
| 4546 | |
| 4547 | ! Write commands to temp file |
| 4548 | do i = first, last |
| 4549 | call get_history_line(i, line, found) |
| 4550 | if (found) then |
| 4551 | write(tmp_unit, '(a)') trim(line) |
| 4552 | end if |
| 4553 | end do |
| 4554 | close(tmp_unit) |
| 4555 | |
| 4556 | ! Launch editor |
| 4557 | edit_cmd = trim(editor) // ' ' // trim(tmpfile) |
| 4558 | i = c_system(trim(edit_cmd) // c_null_char) |
| 4559 | |
| 4560 | ! Read back edited commands and execute them |
| 4561 | open(newunit=tmp_unit, file=trim(tmpfile), status='old', action='read', iostat=iostat) |
| 4562 | if (iostat /= 0) then |
| 4563 | write(error_unit, '(a)') 'fc: failed to read edited file' |
| 4564 | shell%last_exit_status = 1 |
| 4565 | return |
| 4566 | end if |
| 4567 | |
| 4568 | do |
| 4569 | read(tmp_unit, '(a)', iostat=iostat) line |
| 4570 | if (iostat /= 0) exit |
| 4571 | |
| 4572 | if (len_trim(line) == 0 .or. line(1:1) == '#') cycle |
| 4573 | |
| 4574 | ! Execute the line using c_system |
| 4575 | shell%last_exit_status = c_system(trim(line) // c_null_char) |
| 4576 | end do |
| 4577 | |
| 4578 | close(tmp_unit) |
| 4579 | |
| 4580 | ! Clean up temporary file |
| 4581 | call unlink_file(trim(tmpfile)) |
| 4582 | |
| 4583 | shell%last_exit_status = 0 |
| 4584 | end subroutine |
| 4585 | |
| 4586 | function find_history_by_prefix(prefix) result(hist_index) |
| 4587 | character(len=*), intent(in) :: prefix |
| 4588 | integer :: hist_index |
| 4589 | character(len=:), allocatable :: line |
| 4590 | logical :: found |
| 4591 | integer :: i, count, pos |
| 4592 | |
| 4593 | count = get_history_count() |
| 4594 | allocate(character(len=4096) :: line) |
| 4595 | |
| 4596 | ! Search backwards from most recent |
| 4597 | do i = count, 1, -1 |
| 4598 | call get_history_line(i, line, found) |
| 4599 | if (found) then |
| 4600 | pos = index(line, trim(prefix)) |
| 4601 | if (pos == 1) then |
| 4602 | hist_index = i |
| 4603 | return |
| 4604 | end if |
| 4605 | end if |
| 4606 | end do |
| 4607 | |
| 4608 | hist_index = -1 ! Not found |
| 4609 | end function |
| 4610 | |
| 4611 | subroutine unlink_file(filepath) |
| 4612 | character(len=*), intent(in) :: filepath |
| 4613 | integer :: iostat |
| 4614 | |
| 4615 | ! Use Fortran intrinsic to delete file |
| 4616 | open(newunit=iostat, file=trim(filepath), status='old') |
| 4617 | if (iostat >= 0) then |
| 4618 | close(iostat, status='delete') |
| 4619 | end if |
| 4620 | end subroutine |
| 4621 | |
| 4622 | ! =========================================================================== |
| 4623 | ! PROGRAMMABLE COMPLETION BUILTINS |
| 4624 | ! =========================================================================== |
| 4625 | |
| 4626 | subroutine builtin_complete(cmd, shell) |
| 4627 | type(command_t), intent(in) :: cmd |
| 4628 | type(shell_state_t), intent(inout) :: shell |
| 4629 | integer :: i |
| 4630 | character(len=256) :: arg |
| 4631 | type(completion_spec_t) :: spec |
| 4632 | logical :: remove_flag, list_flag, print_flag |
| 4633 | character(len=256) :: word_list_arg, function_arg, action_arg |
| 4634 | character(len=256) :: option_arg, prefix_arg, suffix_arg, filter_arg |
| 4635 | character(len=256) :: command_names(50) |
| 4636 | integer :: num_commands |
| 4637 | |
| 4638 | ! Initialize spec |
| 4639 | spec%is_active = .false. |
| 4640 | spec%command = '' |
| 4641 | spec%word_list_count = 0 |
| 4642 | spec%function_name = '' |
| 4643 | spec%filter_pattern = '' |
| 4644 | spec%prefix = '' |
| 4645 | spec%suffix = '' |
| 4646 | spec%use_default = .false. |
| 4647 | spec%use_dirnames = .false. |
| 4648 | spec%use_filenames = .false. |
| 4649 | spec%nospace = .false. |
| 4650 | spec%plusdirs = .false. |
| 4651 | spec%nosort = .false. |
| 4652 | spec%builtin_alias = .false. |
| 4653 | spec%builtin_command = .false. |
| 4654 | spec%builtin_directory = .false. |
| 4655 | spec%builtin_file = .false. |
| 4656 | spec%builtin_function = .false. |
| 4657 | spec%builtin_hostname = .false. |
| 4658 | spec%builtin_variable = .false. |
| 4659 | spec%builtin_user = .false. |
| 4660 | spec%builtin_group = .false. |
| 4661 | spec%builtin_service = .false. |
| 4662 | spec%builtin_export = .false. |
| 4663 | spec%builtin_keyword = .false. |
| 4664 | spec%builtin_builtin = .false. |
| 4665 | |
| 4666 | remove_flag = .false. |
| 4667 | list_flag = .false. |
| 4668 | print_flag = .false. |
| 4669 | word_list_arg = '' |
| 4670 | function_arg = '' |
| 4671 | action_arg = '' |
| 4672 | option_arg = '' |
| 4673 | prefix_arg = '' |
| 4674 | suffix_arg = '' |
| 4675 | filter_arg = '' |
| 4676 | num_commands = 0 |
| 4677 | |
| 4678 | ! Parse arguments |
| 4679 | i = 2 |
| 4680 | do while (i <= cmd%num_tokens) |
| 4681 | arg = trim(cmd%tokens(i)) |
| 4682 | |
| 4683 | if (arg == '-r') then |
| 4684 | ! Remove completion spec |
| 4685 | remove_flag = .true. |
| 4686 | i = i + 1 |
| 4687 | else if (arg == '-p' .or. arg == '-l') then |
| 4688 | ! List/print completion specs |
| 4689 | list_flag = .true. |
| 4690 | i = i + 1 |
| 4691 | else if (arg == '-W') then |
| 4692 | ! Word list |
| 4693 | if (i + 1 <= cmd%num_tokens) then |
| 4694 | i = i + 1 |
| 4695 | word_list_arg = trim(cmd%tokens(i)) |
| 4696 | i = i + 1 |
| 4697 | else |
| 4698 | write(error_unit, '(a)') 'complete: -W requires an argument' |
| 4699 | shell%last_exit_status = 1 |
| 4700 | return |
| 4701 | end if |
| 4702 | else if (arg == '-F') then |
| 4703 | ! Function name |
| 4704 | if (i + 1 <= cmd%num_tokens) then |
| 4705 | i = i + 1 |
| 4706 | function_arg = trim(cmd%tokens(i)) |
| 4707 | i = i + 1 |
| 4708 | else |
| 4709 | write(error_unit, '(a)') 'complete: -F requires an argument' |
| 4710 | shell%last_exit_status = 1 |
| 4711 | return |
| 4712 | end if |
| 4713 | else if (arg == '-A') then |
| 4714 | ! Built-in action |
| 4715 | if (i + 1 <= cmd%num_tokens) then |
| 4716 | i = i + 1 |
| 4717 | action_arg = trim(cmd%tokens(i)) |
| 4718 | i = i + 1 |
| 4719 | else |
| 4720 | write(error_unit, '(a)') 'complete: -A requires an argument' |
| 4721 | shell%last_exit_status = 1 |
| 4722 | return |
| 4723 | end if |
| 4724 | else if (arg == '-o') then |
| 4725 | ! Option |
| 4726 | if (i + 1 <= cmd%num_tokens) then |
| 4727 | i = i + 1 |
| 4728 | option_arg = trim(cmd%tokens(i)) |
| 4729 | i = i + 1 |
| 4730 | else |
| 4731 | write(error_unit, '(a)') 'complete: -o requires an argument' |
| 4732 | shell%last_exit_status = 1 |
| 4733 | return |
| 4734 | end if |
| 4735 | else if (arg == '-P') then |
| 4736 | ! Prefix |
| 4737 | if (i + 1 <= cmd%num_tokens) then |
| 4738 | i = i + 1 |
| 4739 | prefix_arg = trim(cmd%tokens(i)) |
| 4740 | i = i + 1 |
| 4741 | else |
| 4742 | write(error_unit, '(a)') 'complete: -P requires an argument' |
| 4743 | shell%last_exit_status = 1 |
| 4744 | return |
| 4745 | end if |
| 4746 | else if (arg == '-S') then |
| 4747 | ! Suffix |
| 4748 | if (i + 1 <= cmd%num_tokens) then |
| 4749 | i = i + 1 |
| 4750 | suffix_arg = trim(cmd%tokens(i)) |
| 4751 | i = i + 1 |
| 4752 | else |
| 4753 | write(error_unit, '(a)') 'complete: -S requires an argument' |
| 4754 | shell%last_exit_status = 1 |
| 4755 | return |
| 4756 | end if |
| 4757 | else if (arg == '-X') then |
| 4758 | ! Filter pattern |
| 4759 | if (i + 1 <= cmd%num_tokens) then |
| 4760 | i = i + 1 |
| 4761 | filter_arg = trim(cmd%tokens(i)) |
| 4762 | i = i + 1 |
| 4763 | else |
| 4764 | write(error_unit, '(a)') 'complete: -X requires an argument' |
| 4765 | shell%last_exit_status = 1 |
| 4766 | return |
| 4767 | end if |
| 4768 | else if (arg(1:1) /= '-') then |
| 4769 | ! Command name |
| 4770 | num_commands = num_commands + 1 |
| 4771 | if (num_commands <= 50) then |
| 4772 | command_names(num_commands) = trim(arg) |
| 4773 | end if |
| 4774 | i = i + 1 |
| 4775 | else |
| 4776 | write(error_unit, '(a)') 'complete: invalid option: ' // trim(arg) |
| 4777 | shell%last_exit_status = 2 |
| 4778 | return |
| 4779 | end if |
| 4780 | end do |
| 4781 | |
| 4782 | ! Handle list flag |
| 4783 | if (list_flag) then |
| 4784 | block |
| 4785 | logical :: has_specs |
| 4786 | call list_completion_specs(has_specs) |
| 4787 | if (has_specs) then |
| 4788 | shell%last_exit_status = 0 |
| 4789 | else |
| 4790 | shell%last_exit_status = 1 |
| 4791 | end if |
| 4792 | end block |
| 4793 | return |
| 4794 | end if |
| 4795 | |
| 4796 | ! Handle remove flag |
| 4797 | if (remove_flag) then |
| 4798 | if (num_commands == 0) then |
| 4799 | ! Remove all specs |
| 4800 | call clear_completion_specs() |
| 4801 | else |
| 4802 | ! Remove specific specs |
| 4803 | do i = 1, num_commands |
| 4804 | if (.not. remove_completion_spec(trim(command_names(i)))) then |
| 4805 | shell%last_exit_status = 1 |
| 4806 | end if |
| 4807 | end do |
| 4808 | end if |
| 4809 | shell%last_exit_status = 0 |
| 4810 | return |
| 4811 | end if |
| 4812 | |
| 4813 | ! Build completion spec |
| 4814 | if (len_trim(word_list_arg) > 0) then |
| 4815 | call parse_word_list(word_list_arg, spec) |
| 4816 | end if |
| 4817 | |
| 4818 | if (len_trim(function_arg) > 0) then |
| 4819 | spec%function_name = function_arg |
| 4820 | end if |
| 4821 | |
| 4822 | if (len_trim(action_arg) > 0) then |
| 4823 | select case(trim(action_arg)) |
| 4824 | case('alias') |
| 4825 | spec%builtin_alias = .true. |
| 4826 | case('command') |
| 4827 | spec%builtin_command = .true. |
| 4828 | case('directory') |
| 4829 | spec%builtin_directory = .true. |
| 4830 | case('file') |
| 4831 | spec%builtin_file = .true. |
| 4832 | case('function') |
| 4833 | spec%builtin_function = .true. |
| 4834 | case('hostname') |
| 4835 | spec%builtin_hostname = .true. |
| 4836 | case('variable') |
| 4837 | spec%builtin_variable = .true. |
| 4838 | case('user') |
| 4839 | spec%builtin_user = .true. |
| 4840 | case('group') |
| 4841 | spec%builtin_group = .true. |
| 4842 | case('service') |
| 4843 | spec%builtin_service = .true. |
| 4844 | case('export') |
| 4845 | spec%builtin_export = .true. |
| 4846 | case('keyword') |
| 4847 | spec%builtin_keyword = .true. |
| 4848 | case('builtin') |
| 4849 | spec%builtin_builtin = .true. |
| 4850 | case default |
| 4851 | write(error_unit, '(a)') 'complete: invalid action: ' // trim(action_arg) |
| 4852 | shell%last_exit_status = 1 |
| 4853 | return |
| 4854 | end select |
| 4855 | end if |
| 4856 | |
| 4857 | if (len_trim(option_arg) > 0) then |
| 4858 | select case(trim(option_arg)) |
| 4859 | case('default') |
| 4860 | spec%use_default = .true. |
| 4861 | case('dirnames') |
| 4862 | spec%use_dirnames = .true. |
| 4863 | case('filenames') |
| 4864 | spec%use_filenames = .true. |
| 4865 | case('nospace') |
| 4866 | spec%nospace = .true. |
| 4867 | case('plusdirs') |
| 4868 | spec%plusdirs = .true. |
| 4869 | case('nosort') |
| 4870 | spec%nosort = .true. |
| 4871 | case default |
| 4872 | write(error_unit, '(a)') 'complete: invalid option: ' // trim(option_arg) |
| 4873 | shell%last_exit_status = 1 |
| 4874 | return |
| 4875 | end select |
| 4876 | end if |
| 4877 | |
| 4878 | if (len_trim(prefix_arg) > 0) then |
| 4879 | spec%prefix = prefix_arg |
| 4880 | end if |
| 4881 | |
| 4882 | if (len_trim(suffix_arg) > 0) then |
| 4883 | spec%suffix = suffix_arg |
| 4884 | end if |
| 4885 | |
| 4886 | if (len_trim(filter_arg) > 0) then |
| 4887 | spec%filter_pattern = filter_arg |
| 4888 | end if |
| 4889 | |
| 4890 | ! Register spec for each command |
| 4891 | if (num_commands == 0) then |
| 4892 | write(error_unit, '(a)') 'complete: no command names specified' |
| 4893 | shell%last_exit_status = 1 |
| 4894 | return |
| 4895 | end if |
| 4896 | |
| 4897 | do i = 1, num_commands |
| 4898 | spec%command = trim(command_names(i)) |
| 4899 | if (.not. register_completion_spec(spec)) then |
| 4900 | write(error_unit, '(a)') 'complete: failed to register spec for ' // trim(command_names(i)) |
| 4901 | shell%last_exit_status = 1 |
| 4902 | return |
| 4903 | end if |
| 4904 | end do |
| 4905 | |
| 4906 | shell%last_exit_status = 0 |
| 4907 | end subroutine builtin_complete |
| 4908 | |
| 4909 | subroutine builtin_compgen(cmd, shell) |
| 4910 | type(command_t), intent(in) :: cmd |
| 4911 | type(shell_state_t), intent(inout) :: shell |
| 4912 | character(len=256) :: word_list_arg, prefix_arg |
| 4913 | integer :: i |
| 4914 | character(len=256) :: arg |
| 4915 | type(completion_spec_t) :: spec |
| 4916 | character(len=256) :: completions(MAX_COMPLETIONS) |
| 4917 | integer :: completion_count |
| 4918 | |
| 4919 | ! compgen is used for testing completion specs |
| 4920 | ! Syntax: compgen -W "word1 word2 word3" [prefix] |
| 4921 | |
| 4922 | word_list_arg = '' |
| 4923 | prefix_arg = '' |
| 4924 | |
| 4925 | ! Parse arguments |
| 4926 | i = 2 |
| 4927 | do while (i <= cmd%num_tokens) |
| 4928 | arg = trim(cmd%tokens(i)) |
| 4929 | |
| 4930 | if (arg == '-W') then |
| 4931 | ! Word list |
| 4932 | if (i + 1 <= cmd%num_tokens) then |
| 4933 | i = i + 1 |
| 4934 | word_list_arg = trim(cmd%tokens(i)) |
| 4935 | i = i + 1 |
| 4936 | else |
| 4937 | write(error_unit, '(a)') 'compgen: -W requires an argument' |
| 4938 | shell%last_exit_status = 1 |
| 4939 | return |
| 4940 | end if |
| 4941 | else if (arg(1:1) /= '-') then |
| 4942 | ! Prefix to match |
| 4943 | prefix_arg = trim(arg) |
| 4944 | i = i + 1 |
| 4945 | else |
| 4946 | write(error_unit, '(a)') 'compgen: invalid option: ' // trim(arg) |
| 4947 | shell%last_exit_status = 2 |
| 4948 | return |
| 4949 | end if |
| 4950 | end do |
| 4951 | |
| 4952 | ! Build a temporary spec for testing |
| 4953 | spec%is_active = .true. |
| 4954 | spec%word_list_count = 0 |
| 4955 | spec%function_name = '' |
| 4956 | spec%filter_pattern = '' |
| 4957 | spec%prefix = '' |
| 4958 | spec%suffix = '' |
| 4959 | spec%use_default = .false. |
| 4960 | spec%use_dirnames = .false. |
| 4961 | spec%use_filenames = .false. |
| 4962 | spec%nospace = .false. |
| 4963 | spec%plusdirs = .false. |
| 4964 | spec%nosort = .true. ! compgen preserves input order (no sorting) |
| 4965 | |
| 4966 | if (len_trim(word_list_arg) > 0) then |
| 4967 | call parse_word_list(word_list_arg, spec) |
| 4968 | end if |
| 4969 | |
| 4970 | ! Generate completions |
| 4971 | call generate_word_list_completions(spec, prefix_arg, completions, completion_count) |
| 4972 | |
| 4973 | ! Print completions (one per line) |
| 4974 | do i = 1, completion_count |
| 4975 | write(output_unit, '(a)') trim(completions(i)) |
| 4976 | end do |
| 4977 | |
| 4978 | if (completion_count > 0) then |
| 4979 | shell%last_exit_status = 0 |
| 4980 | else |
| 4981 | shell%last_exit_status = 1 |
| 4982 | end if |
| 4983 | end subroutine builtin_compgen |
| 4984 | |
| 4985 | ! =========================================================================== |
| 4986 | ! Directory History Functions (Fish-style prevd/nextd) |
| 4987 | ! =========================================================================== |
| 4988 | |
| 4989 | ! Add directory to history |
| 4990 | subroutine add_to_dir_history(shell, dir) |
| 4991 | type(shell_state_t), intent(inout) :: shell |
| 4992 | character(len=*), intent(in) :: dir |
| 4993 | integer :: i |
| 4994 | |
| 4995 | ! Don't add if it's the same as the last entry (avoid consecutive duplicates) |
| 4996 | if (shell%dir_history_size > 0) then |
| 4997 | if (trim(shell%dir_history(shell%dir_history_size)) == trim(dir)) then |
| 4998 | ! Duplicate of last entry, just update index to point here |
| 4999 | shell%dir_history_index = shell%dir_history_size |
| 5000 | return |
| 5001 | end if |
| 5002 | end if |
| 5003 | |
| 5004 | ! If we're browsing history (not at the end), truncate everything after current position |
| 5005 | ! This implements browser-style history: go back, then cd somewhere = discard forward history |
| 5006 | if (shell%dir_history_index > 0 .and. shell%dir_history_index < shell%dir_history_size) then |
| 5007 | shell%dir_history_size = shell%dir_history_index |
| 5008 | end if |
| 5009 | |
| 5010 | ! Add new directory |
| 5011 | if (shell%dir_history_size < 50) then |
| 5012 | shell%dir_history_size = shell%dir_history_size + 1 |
| 5013 | else |
| 5014 | ! Shift history left (circular buffer) |
| 5015 | do i = 1, 49 |
| 5016 | shell%dir_history(i) = shell%dir_history(i + 1) |
| 5017 | end do |
| 5018 | end if |
| 5019 | |
| 5020 | shell%dir_history(shell%dir_history_size) = trim(dir) |
| 5021 | ! Set index to point at the newly added directory (current position) |
| 5022 | shell%dir_history_index = shell%dir_history_size |
| 5023 | end subroutine add_to_dir_history |
| 5024 | |
| 5025 | ! prevd builtin - go to previous directory in history |
| 5026 | subroutine builtin_prevd(cmd, shell) |
| 5027 | type(command_t), intent(in) :: cmd |
| 5028 | type(shell_state_t), intent(inout) :: shell |
| 5029 | |
| 5030 | if (.false.) print *, cmd%num_tokens ! Silence unused warning |
| 5031 | |
| 5032 | ! Check if we can go back (must be at index > 1) |
| 5033 | if (shell%dir_history_index <= 1) then |
| 5034 | write(error_unit, '(a)') 'prevd: no previous directory' |
| 5035 | shell%last_exit_status = 1 |
| 5036 | return |
| 5037 | end if |
| 5038 | |
| 5039 | ! Move back in history |
| 5040 | shell%dir_history_index = shell%dir_history_index - 1 |
| 5041 | |
| 5042 | if (change_directory(trim(shell%dir_history(shell%dir_history_index)))) then |
| 5043 | shell%oldpwd = shell%cwd |
| 5044 | shell%cwd = get_current_directory() |
| 5045 | write(output_unit, '(a)') trim(shell%cwd) |
| 5046 | shell%last_exit_status = 0 |
| 5047 | else |
| 5048 | write(error_unit, '(a)') 'prevd: cannot access directory' |
| 5049 | shell%dir_history_index = shell%dir_history_index + 1 |
| 5050 | shell%last_exit_status = 1 |
| 5051 | end if |
| 5052 | end subroutine builtin_prevd |
| 5053 | |
| 5054 | ! nextd builtin - go to next directory in history |
| 5055 | subroutine builtin_nextd(cmd, shell) |
| 5056 | type(command_t), intent(in) :: cmd |
| 5057 | type(shell_state_t), intent(inout) :: shell |
| 5058 | |
| 5059 | if (.false.) print *, cmd%num_tokens ! Silence unused warning |
| 5060 | |
| 5061 | ! Check if we can go forward (must be at index < size) |
| 5062 | if (shell%dir_history_index >= shell%dir_history_size) then |
| 5063 | write(error_unit, '(a)') 'nextd: no next directory' |
| 5064 | shell%last_exit_status = 1 |
| 5065 | return |
| 5066 | end if |
| 5067 | |
| 5068 | ! Move forward in history |
| 5069 | shell%dir_history_index = shell%dir_history_index + 1 |
| 5070 | |
| 5071 | if (change_directory(trim(shell%dir_history(shell%dir_history_index)))) then |
| 5072 | shell%oldpwd = shell%cwd |
| 5073 | shell%cwd = get_current_directory() |
| 5074 | write(output_unit, '(a)') trim(shell%cwd) |
| 5075 | shell%last_exit_status = 0 |
| 5076 | else |
| 5077 | write(error_unit, '(a)') 'nextd: cannot access directory' |
| 5078 | shell%dir_history_index = shell%dir_history_index - 1 |
| 5079 | shell%last_exit_status = 1 |
| 5080 | end if |
| 5081 | end subroutine builtin_nextd |
| 5082 | |
| 5083 | ! dirh builtin - show directory history |
| 5084 | subroutine builtin_dirh(cmd, shell) |
| 5085 | type(command_t), intent(in) :: cmd |
| 5086 | type(shell_state_t), intent(inout) :: shell |
| 5087 | integer :: i |
| 5088 | |
| 5089 | if (.false.) print *, cmd%num_tokens ! Silence unused warning |
| 5090 | |
| 5091 | if (shell%dir_history_size == 0) then |
| 5092 | write(output_unit, '(a)') 'Directory history is empty' |
| 5093 | shell%last_exit_status = 0 |
| 5094 | return |
| 5095 | end if |
| 5096 | |
| 5097 | write(output_unit, '(a)') 'Directory history:' |
| 5098 | do i = 1, shell%dir_history_size |
| 5099 | if (i == shell%dir_history_index) then |
| 5100 | ! Highlight current position |
| 5101 | write(output_unit, '(i3,a,a)') i, ' * ', trim(shell%dir_history(i)) |
| 5102 | else |
| 5103 | write(output_unit, '(i3,a,a)') i, ' ', trim(shell%dir_history(i)) |
| 5104 | end if |
| 5105 | end do |
| 5106 | |
| 5107 | shell%last_exit_status = 0 |
| 5108 | end subroutine builtin_dirh |
| 5109 | |
| 5110 | ! Execute EXIT trap inline (to avoid circular dependency with executor module) |
| 5111 | subroutine execute_exit_trap_inline(shell) |
| 5112 | type(shell_state_t), intent(inout) :: shell |
| 5113 | character(len=:), allocatable :: trap_cmd |
| 5114 | integer :: saved_status |
| 5115 | type(pipeline_t) :: trap_pipeline |
| 5116 | integer :: i |
| 5117 | |
| 5118 | ! Save trap command and clear |
| 5119 | trap_cmd = shell%pending_trap_command |
| 5120 | shell%pending_trap_command = '' |
| 5121 | shell%pending_trap_signal = 0 |
| 5122 | |
| 5123 | ! Save exit status (traps don't affect $?) |
| 5124 | saved_status = shell%last_exit_status |
| 5125 | |
| 5126 | ! Set flag to prevent recursive traps |
| 5127 | shell%executing_trap = .true. |
| 5128 | |
| 5129 | ! Parse trap command |
| 5130 | call parse_pipeline(trim(trap_cmd), trap_pipeline) |
| 5131 | |
| 5132 | ! Execute it in current shell context (inline execution using c_system) |
| 5133 | ! We use c_system instead of execute_pipeline to avoid circular dependency |
| 5134 | if (len_trim(trap_cmd) > 0) then |
| 5135 | i = c_system(trim(trap_cmd) // c_null_char) |
| 5136 | end if |
| 5137 | |
| 5138 | ! Clean up pipeline allocations |
| 5139 | if (allocated(trap_pipeline%commands)) then |
| 5140 | do i = 1, trap_pipeline%num_commands |
| 5141 | if (allocated(trap_pipeline%commands(i)%tokens)) deallocate(trap_pipeline%commands(i)%tokens) |
| 5142 | if (allocated(trap_pipeline%commands(i)%input_file)) deallocate(trap_pipeline%commands(i)%input_file) |
| 5143 | if (allocated(trap_pipeline%commands(i)%output_file)) deallocate(trap_pipeline%commands(i)%output_file) |
| 5144 | if (allocated(trap_pipeline%commands(i)%error_file)) deallocate(trap_pipeline%commands(i)%error_file) |
| 5145 | if (allocated(trap_pipeline%commands(i)%heredoc_delimiter)) deallocate(trap_pipeline%commands(i)%heredoc_delimiter) |
| 5146 | if (allocated(trap_pipeline%commands(i)%heredoc_content)) deallocate(trap_pipeline%commands(i)%heredoc_content) |
| 5147 | if (allocated(trap_pipeline%commands(i)%here_string)) deallocate(trap_pipeline%commands(i)%here_string) |
| 5148 | end do |
| 5149 | deallocate(trap_pipeline%commands) |
| 5150 | end if |
| 5151 | |
| 5152 | ! Clear flag |
| 5153 | shell%executing_trap = .false. |
| 5154 | |
| 5155 | ! Restore exit status (traps don't affect $?) |
| 5156 | shell%last_exit_status = saved_status |
| 5157 | end subroutine execute_exit_trap_inline |
| 5158 | |
| 5159 | |
| 5160 | end module builtins |
| 5161 |