| 1 | ! ============================================================================== |
| 2 | ! Module: builtins (Extended with job control) |
| 3 | ! ============================================================================== |
| 4 | module builtins |
| 5 | use shell_types |
| 6 | use system_interface |
| 7 | use job_control |
| 8 | use test_builtin |
| 9 | use readline |
| 10 | use shell_config |
| 11 | use aliases |
| 12 | use shell_options |
| 13 | use command_builtin, only: find_command_in_path |
| 14 | use performance |
| 15 | use parser |
| 16 | use coprocess |
| 17 | use substitution |
| 18 | use iso_fortran_env, only: output_unit, error_unit |
| 19 | implicit none |
| 20 | |
| 21 | contains |
| 22 | |
| 23 | function is_builtin(cmd_name) result(is_built) |
| 24 | character(len=*), intent(in) :: cmd_name |
| 25 | logical :: is_built |
| 26 | |
| 27 | is_built = (trim(cmd_name) == 'exit' .or. & |
| 28 | trim(cmd_name) == 'cd' .or. & |
| 29 | trim(cmd_name) == 'pwd' .or. & |
| 30 | trim(cmd_name) == 'export' .or. & |
| 31 | trim(cmd_name) == 'echo' .or. & |
| 32 | trim(cmd_name) == 'jobs' .or. & |
| 33 | trim(cmd_name) == 'fg' .or. & |
| 34 | trim(cmd_name) == 'bg' .or. & |
| 35 | trim(cmd_name) == 'source' .or. & |
| 36 | trim(cmd_name) == '.' .or. & |
| 37 | trim(cmd_name) == 'history' .or. & |
| 38 | trim(cmd_name) == 'kill' .or. & |
| 39 | trim(cmd_name) == 'wait' .or. & |
| 40 | trim(cmd_name) == 'trap' .or. & |
| 41 | trim(cmd_name) == 'config' .or. & |
| 42 | trim(cmd_name) == 'alias' .or. & |
| 43 | trim(cmd_name) == 'unalias' .or. & |
| 44 | trim(cmd_name) == 'help' .or. & |
| 45 | trim(cmd_name) == 'perf' .or. & |
| 46 | trim(cmd_name) == 'memory' .or. & |
| 47 | trim(cmd_name) == 'rawtest' .or. & |
| 48 | trim(cmd_name) == 'defun' .or. & |
| 49 | trim(cmd_name) == 'set' .or. & |
| 50 | trim(cmd_name) == 'shopt' .or. & |
| 51 | trim(cmd_name) == 'type' .or. & |
| 52 | trim(cmd_name) == 'unset' .or. & |
| 53 | trim(cmd_name) == 'readonly' .or. & |
| 54 | trim(cmd_name) == 'shift' .or. & |
| 55 | trim(cmd_name) == 'break' .or. & |
| 56 | trim(cmd_name) == 'continue' .or. & |
| 57 | trim(cmd_name) == 'return' .or. & |
| 58 | trim(cmd_name) == 'exec' .or. & |
| 59 | trim(cmd_name) == 'eval' .or. & |
| 60 | trim(cmd_name) == 'hash' .or. & |
| 61 | trim(cmd_name) == 'umask' .or. & |
| 62 | trim(cmd_name) == 'ulimit' .or. & |
| 63 | trim(cmd_name) == 'times' .or. & |
| 64 | is_test_command(cmd_name)) |
| 65 | end function |
| 66 | |
| 67 | subroutine execute_builtin(cmd, shell) |
| 68 | type(command_t), intent(in) :: cmd |
| 69 | type(shell_state_t), intent(inout) :: shell |
| 70 | |
| 71 | select case(trim(cmd%tokens(1))) |
| 72 | case('exit') |
| 73 | call builtin_exit(cmd, shell) |
| 74 | case('cd') |
| 75 | call builtin_cd(cmd, shell) |
| 76 | case('pwd') |
| 77 | call builtin_pwd(cmd, shell) |
| 78 | case('export') |
| 79 | call builtin_export(cmd, shell) |
| 80 | case('echo') |
| 81 | call builtin_echo(cmd, shell) |
| 82 | case('jobs') |
| 83 | call builtin_jobs(cmd, shell) |
| 84 | case('fg') |
| 85 | call builtin_fg(cmd, shell) |
| 86 | case('bg') |
| 87 | call builtin_bg(cmd, shell) |
| 88 | case('source', '.') |
| 89 | call builtin_source(cmd, shell) |
| 90 | case('history') |
| 91 | call builtin_history(cmd, shell) |
| 92 | case('kill') |
| 93 | call builtin_kill(cmd, shell) |
| 94 | case('wait') |
| 95 | call builtin_wait(cmd, shell) |
| 96 | case('trap') |
| 97 | call builtin_trap(cmd, shell) |
| 98 | case('config') |
| 99 | call builtin_config(cmd, shell) |
| 100 | case('alias') |
| 101 | call builtin_alias(cmd, shell) |
| 102 | case('unalias') |
| 103 | call builtin_unalias(cmd, shell) |
| 104 | case('help') |
| 105 | call builtin_help(cmd, shell) |
| 106 | case('perf') |
| 107 | call builtin_perf(cmd, shell) |
| 108 | case('memory') |
| 109 | call builtin_memory(cmd, shell) |
| 110 | case('rawtest') |
| 111 | call builtin_rawtest(cmd, shell) |
| 112 | case('defun') |
| 113 | call builtin_defun(cmd, shell) |
| 114 | case('test', '[', '[[') |
| 115 | call execute_test_command(cmd, shell) |
| 116 | case('set') |
| 117 | call builtin_set(cmd, shell) |
| 118 | case('shopt') |
| 119 | call builtin_shopt(cmd, shell) |
| 120 | case('type') |
| 121 | call builtin_type(cmd, shell) |
| 122 | case('unset') |
| 123 | call builtin_unset(cmd, shell) |
| 124 | case('readonly') |
| 125 | call builtin_readonly(cmd, shell) |
| 126 | case('shift') |
| 127 | call builtin_shift(cmd, shell) |
| 128 | case('break') |
| 129 | call builtin_break(cmd, shell) |
| 130 | case('continue') |
| 131 | call builtin_continue(cmd, shell) |
| 132 | case('return') |
| 133 | call builtin_return(cmd, shell) |
| 134 | case('exec') |
| 135 | call builtin_exec(cmd, shell) |
| 136 | case('eval') |
| 137 | call builtin_eval(cmd, shell) |
| 138 | case('hash') |
| 139 | call builtin_hash(cmd, shell) |
| 140 | case('umask') |
| 141 | call builtin_umask(cmd, shell) |
| 142 | case('ulimit') |
| 143 | call builtin_ulimit(cmd, shell) |
| 144 | case('times') |
| 145 | call builtin_times(cmd, shell) |
| 146 | case default |
| 147 | ! Should not reach here if is_builtin works correctly |
| 148 | shell%last_exit_status = 1 |
| 149 | end select |
| 150 | end subroutine |
| 151 | |
| 152 | subroutine builtin_exit(cmd, shell) |
| 153 | type(command_t), intent(in) :: cmd |
| 154 | type(shell_state_t), intent(inout) :: shell |
| 155 | |
| 156 | shell%running = .false. |
| 157 | if (cmd%num_tokens > 1) then |
| 158 | read(cmd%tokens(2), *, iostat=shell%last_exit_status) shell%last_exit_status |
| 159 | end if |
| 160 | end subroutine |
| 161 | |
| 162 | subroutine builtin_cd(cmd, shell) |
| 163 | type(command_t), intent(in) :: cmd |
| 164 | type(shell_state_t), intent(inout) :: shell |
| 165 | character(len=:), allocatable :: target_dir |
| 166 | |
| 167 | if (cmd%num_tokens == 1) then |
| 168 | target_dir = get_environment_var('HOME') |
| 169 | else |
| 170 | target_dir = trim(cmd%tokens(2)) |
| 171 | end if |
| 172 | |
| 173 | if (change_directory(target_dir)) then |
| 174 | shell%cwd = get_current_directory() |
| 175 | shell%last_exit_status = 0 |
| 176 | else |
| 177 | write(error_unit, '(a)') 'cd: cannot access ' // trim(target_dir) // & |
| 178 | ': No such file or directory. Use "pwd" to see current location.' |
| 179 | shell%last_exit_status = 1 |
| 180 | end if |
| 181 | end subroutine |
| 182 | |
| 183 | subroutine builtin_pwd(cmd, shell) |
| 184 | type(command_t), intent(in) :: cmd |
| 185 | type(shell_state_t), intent(inout) :: shell |
| 186 | |
| 187 | write(output_unit, '(a)') trim(shell%cwd) |
| 188 | shell%last_exit_status = 0 |
| 189 | end subroutine |
| 190 | |
| 191 | subroutine builtin_export(cmd, shell) |
| 192 | type(command_t), intent(in) :: cmd |
| 193 | type(shell_state_t), intent(inout) :: shell |
| 194 | integer :: eq_pos |
| 195 | character(len=MAX_TOKEN_LEN) :: var_name, var_value |
| 196 | |
| 197 | if (cmd%num_tokens < 2) then |
| 198 | write(error_unit, '(a)') 'export: usage: export VAR=value' |
| 199 | shell%last_exit_status = 1 |
| 200 | return |
| 201 | end if |
| 202 | |
| 203 | eq_pos = index(cmd%tokens(2), '=') |
| 204 | if (eq_pos > 0) then |
| 205 | var_name = cmd%tokens(2)(:eq_pos-1) |
| 206 | var_value = cmd%tokens(2)(eq_pos+1:) |
| 207 | |
| 208 | if (set_environment_var(trim(var_name), trim(var_value))) then |
| 209 | shell%last_exit_status = 0 |
| 210 | else |
| 211 | write(error_unit, '(a)') 'export: failed to set variable' |
| 212 | shell%last_exit_status = 1 |
| 213 | end if |
| 214 | else |
| 215 | write(error_unit, '(a)') 'export: usage: export VAR=value' |
| 216 | shell%last_exit_status = 1 |
| 217 | end if |
| 218 | end subroutine |
| 219 | |
| 220 | subroutine builtin_echo(cmd, shell) |
| 221 | type(command_t), intent(in) :: cmd |
| 222 | type(shell_state_t), intent(inout) :: shell |
| 223 | integer :: i |
| 224 | logical :: first |
| 225 | |
| 226 | ! Simple echo implementation |
| 227 | if (.not. allocated(cmd%tokens) .or. cmd%num_tokens < 1) then |
| 228 | write(*,'(a)') '' |
| 229 | shell%last_exit_status = 0 |
| 230 | return |
| 231 | end if |
| 232 | |
| 233 | first = .true. |
| 234 | do i = 2, cmd%num_tokens |
| 235 | if (.not. first) write(*,'(a)',advance='no') ' ' |
| 236 | write(*,'(a)',advance='no') trim(cmd%tokens(i)) |
| 237 | first = .false. |
| 238 | end do |
| 239 | write(*,'(a)') '' |
| 240 | |
| 241 | shell%last_exit_status = 0 |
| 242 | end subroutine |
| 243 | |
| 244 | subroutine builtin_jobs(cmd, shell) |
| 245 | type(command_t), intent(in) :: cmd |
| 246 | type(shell_state_t), intent(inout) :: shell |
| 247 | logical :: show_pids |
| 248 | |
| 249 | ! Check for -p flag to show PIDs |
| 250 | show_pids = .false. |
| 251 | if (cmd%num_tokens > 1 .and. trim(cmd%tokens(2)) == '-p') then |
| 252 | show_pids = .true. |
| 253 | end if |
| 254 | |
| 255 | call list_jobs(shell, show_pids) |
| 256 | shell%last_exit_status = 0 |
| 257 | end subroutine |
| 258 | |
| 259 | subroutine builtin_fg(cmd, shell) |
| 260 | type(command_t), intent(in) :: cmd |
| 261 | type(shell_state_t), intent(inout) :: shell |
| 262 | integer :: job_id, iostat, i |
| 263 | |
| 264 | if (cmd%num_tokens < 2) then |
| 265 | ! Bring most recent stopped job to foreground |
| 266 | job_id = 0 |
| 267 | do i = MAX_JOBS, 1, -1 |
| 268 | if (shell%jobs(i)%job_id > 0 .and. shell%jobs(i)%state == JOB_STOPPED) then |
| 269 | job_id = shell%jobs(i)%job_id |
| 270 | exit |
| 271 | end if |
| 272 | end do |
| 273 | |
| 274 | if (job_id == 0) then |
| 275 | write(error_unit, '(a)') 'fg: no stopped job' |
| 276 | shell%last_exit_status = 1 |
| 277 | return |
| 278 | end if |
| 279 | else |
| 280 | ! Parse job number (handle %n syntax) |
| 281 | if (cmd%tokens(2)(1:1) == '%') then |
| 282 | read(cmd%tokens(2)(2:), *, iostat=iostat) job_id |
| 283 | else |
| 284 | read(cmd%tokens(2), *, iostat=iostat) job_id |
| 285 | end if |
| 286 | |
| 287 | if (iostat /= 0) then |
| 288 | write(error_unit, '(a)') 'fg: invalid job id' |
| 289 | shell%last_exit_status = 1 |
| 290 | return |
| 291 | end if |
| 292 | end if |
| 293 | |
| 294 | call resume_job_fg(shell, job_id) |
| 295 | end subroutine |
| 296 | |
| 297 | subroutine builtin_bg(cmd, shell) |
| 298 | type(command_t), intent(in) :: cmd |
| 299 | type(shell_state_t), intent(inout) :: shell |
| 300 | integer :: job_id, iostat, i |
| 301 | |
| 302 | if (cmd%num_tokens < 2) then |
| 303 | ! Continue most recent stopped job in background |
| 304 | job_id = 0 |
| 305 | do i = MAX_JOBS, 1, -1 |
| 306 | if (shell%jobs(i)%job_id > 0 .and. & |
| 307 | shell%jobs(i)%state == JOB_STOPPED) then |
| 308 | job_id = shell%jobs(i)%job_id |
| 309 | exit |
| 310 | end if |
| 311 | end do |
| 312 | |
| 313 | if (job_id == 0) then |
| 314 | write(error_unit, '(a)') 'bg: no stopped job' |
| 315 | shell%last_exit_status = 1 |
| 316 | return |
| 317 | end if |
| 318 | else |
| 319 | ! Parse job number (handle %n syntax) |
| 320 | if (cmd%tokens(2)(1:1) == '%') then |
| 321 | read(cmd%tokens(2)(2:), *, iostat=iostat) job_id |
| 322 | else |
| 323 | read(cmd%tokens(2), *, iostat=iostat) job_id |
| 324 | end if |
| 325 | |
| 326 | if (iostat /= 0) then |
| 327 | write(error_unit, '(a)') 'bg: invalid job id' |
| 328 | shell%last_exit_status = 1 |
| 329 | return |
| 330 | end if |
| 331 | end if |
| 332 | |
| 333 | call resume_job_bg(shell, job_id) |
| 334 | end subroutine |
| 335 | |
| 336 | subroutine builtin_source(cmd, shell) |
| 337 | type(command_t), intent(in) :: cmd |
| 338 | type(shell_state_t), intent(inout) :: shell |
| 339 | |
| 340 | character(len=1024) :: filename |
| 341 | logical :: file_exists |
| 342 | |
| 343 | ! Check if filename provided |
| 344 | if (cmd%num_tokens < 2) then |
| 345 | write(error_unit, '(a)') 'source: usage: source filename [arguments...]' |
| 346 | shell%last_exit_status = 1 |
| 347 | return |
| 348 | end if |
| 349 | |
| 350 | filename = trim(cmd%tokens(2)) |
| 351 | |
| 352 | ! Check if file exists and is readable |
| 353 | inquire(file=filename, exist=file_exists) |
| 354 | if (.not. file_exists) then |
| 355 | write(error_unit, '(a)') 'source: ' // trim(filename) // ': No such file or directory' |
| 356 | shell%last_exit_status = 1 |
| 357 | return |
| 358 | end if |
| 359 | |
| 360 | ! Mark the shell to source this file on next main loop iteration |
| 361 | ! This avoids circular dependency issues |
| 362 | shell%source_file = filename |
| 363 | shell%should_source = .true. |
| 364 | shell%last_exit_status = 0 |
| 365 | |
| 366 | write(output_unit, '(a)') 'source: ' // trim(filename) // ' queued for execution' |
| 367 | end subroutine |
| 368 | |
| 369 | subroutine builtin_history(cmd, shell) |
| 370 | type(command_t), intent(in) :: cmd |
| 371 | type(shell_state_t), intent(inout) :: shell |
| 372 | |
| 373 | ! Handle history command options |
| 374 | if (cmd%num_tokens > 1) then |
| 375 | select case(trim(cmd%tokens(2))) |
| 376 | case('-c', '--clear') |
| 377 | call clear_history() |
| 378 | write(output_unit, '(a)') 'Command history cleared.' |
| 379 | case default |
| 380 | write(error_unit, '(a)') 'history: unknown option' |
| 381 | shell%last_exit_status = 1 |
| 382 | return |
| 383 | end select |
| 384 | else |
| 385 | ! Show all history |
| 386 | call show_history() |
| 387 | end if |
| 388 | |
| 389 | shell%last_exit_status = 0 |
| 390 | end subroutine |
| 391 | |
| 392 | subroutine builtin_kill(cmd, shell) |
| 393 | type(command_t), intent(in) :: cmd |
| 394 | type(shell_state_t), intent(inout) :: shell |
| 395 | integer :: signal_num, target_pid, iostat, ret |
| 396 | integer :: i, arg_start |
| 397 | logical :: found_signal |
| 398 | |
| 399 | signal_num = 15 ! Default: SIGTERM |
| 400 | arg_start = 2 |
| 401 | found_signal = .false. |
| 402 | |
| 403 | if (cmd%num_tokens < 2) then |
| 404 | write(error_unit, '(a)') 'kill: usage: kill [-signal] pid...' |
| 405 | shell%last_exit_status = 1 |
| 406 | return |
| 407 | end if |
| 408 | |
| 409 | ! Check if first argument is a signal specifier or -l flag |
| 410 | if (cmd%tokens(2)(1:1) == '-') then |
| 411 | if (len_trim(cmd%tokens(2)) > 1) then |
| 412 | ! Check for -l flag (list signals) |
| 413 | if (trim(cmd%tokens(2)) == '-l') then |
| 414 | write(output_unit, '(a)') 'Available signals:' |
| 415 | write(output_unit, '(a)') ' 1) SIGHUP 2) SIGINT 3) SIGQUIT 4) SIGILL' |
| 416 | write(output_unit, '(a)') ' 5) SIGTRAP 6) SIGABRT 7) SIGBUS 8) SIGFPE' |
| 417 | write(output_unit, '(a)') ' 9) SIGKILL 10) SIGUSR1 11) SIGSEGV 12) SIGUSR2' |
| 418 | write(output_unit, '(a)') ' 13) SIGPIPE 14) SIGALRM 15) SIGTERM 16) SIGSTKFLT' |
| 419 | write(output_unit, '(a)') ' 17) SIGCHLD 18) SIGCONT 19) SIGSTOP 20) SIGTSTP' |
| 420 | write(output_unit, '(a)') ' 21) SIGTTIN 22) SIGTTOU' |
| 421 | shell%last_exit_status = 0 |
| 422 | return |
| 423 | end if |
| 424 | |
| 425 | read(cmd%tokens(2)(2:), *, iostat=iostat) signal_num |
| 426 | if (iostat /= 0) then |
| 427 | ! Try named signals |
| 428 | select case(trim(cmd%tokens(2)(2:))) |
| 429 | case('TERM', 'term') |
| 430 | signal_num = 15 |
| 431 | case('KILL', 'kill') |
| 432 | signal_num = 9 |
| 433 | case('INT', 'int') |
| 434 | signal_num = 2 |
| 435 | case('STOP', 'stop') |
| 436 | signal_num = 19 |
| 437 | case('CONT', 'cont') |
| 438 | signal_num = 18 |
| 439 | case('HUP', 'hup') |
| 440 | signal_num = 1 |
| 441 | case('QUIT', 'quit') |
| 442 | signal_num = 3 |
| 443 | case default |
| 444 | write(error_unit, '(a)') 'kill: invalid signal specification' |
| 445 | shell%last_exit_status = 1 |
| 446 | return |
| 447 | end select |
| 448 | end if |
| 449 | found_signal = .true. |
| 450 | arg_start = 3 |
| 451 | end if |
| 452 | end if |
| 453 | |
| 454 | if (cmd%num_tokens < arg_start) then |
| 455 | write(error_unit, '(a)') 'kill: usage: kill [-signal] pid...' |
| 456 | shell%last_exit_status = 1 |
| 457 | return |
| 458 | end if |
| 459 | |
| 460 | ! Kill each specified process |
| 461 | do i = arg_start, cmd%num_tokens |
| 462 | ! Handle job syntax (%n) |
| 463 | if (cmd%tokens(i)(1:1) == '%') then |
| 464 | read(cmd%tokens(i)(2:), *, iostat=iostat) target_pid |
| 465 | if (iostat == 0) then |
| 466 | ! Find job by job_id and get its pgid |
| 467 | target_pid = find_job_pgid(shell, target_pid) |
| 468 | if (target_pid <= 0) then |
| 469 | write(error_unit, '(a)') 'kill: no such job' |
| 470 | shell%last_exit_status = 1 |
| 471 | cycle |
| 472 | end if |
| 473 | target_pid = -target_pid ! Kill entire process group |
| 474 | else |
| 475 | write(error_unit, '(a)') 'kill: invalid job specification' |
| 476 | shell%last_exit_status = 1 |
| 477 | cycle |
| 478 | end if |
| 479 | else |
| 480 | read(cmd%tokens(i), *, iostat=iostat) target_pid |
| 481 | if (iostat /= 0) then |
| 482 | write(error_unit, '(a)') 'kill: invalid pid' |
| 483 | shell%last_exit_status = 1 |
| 484 | cycle |
| 485 | end if |
| 486 | end if |
| 487 | |
| 488 | ret = c_kill(int(target_pid, c_pid_t), int(signal_num, c_int)) |
| 489 | if (ret /= 0) then |
| 490 | write(error_unit, '(a,i0)') 'kill: failed to kill process ', target_pid |
| 491 | shell%last_exit_status = 1 |
| 492 | end if |
| 493 | end do |
| 494 | |
| 495 | if (shell%last_exit_status /= 1) then |
| 496 | shell%last_exit_status = 0 |
| 497 | end if |
| 498 | end subroutine |
| 499 | |
| 500 | |
| 501 | subroutine builtin_wait(cmd, shell) |
| 502 | type(command_t), intent(in) :: cmd |
| 503 | type(shell_state_t), intent(inout) :: shell |
| 504 | integer :: target_pid, iostat, ret |
| 505 | integer(c_int), target :: wait_status |
| 506 | integer :: i |
| 507 | |
| 508 | if (cmd%num_tokens == 1) then |
| 509 | ! Wait for all background jobs |
| 510 | do i = 1, MAX_JOBS |
| 511 | if (shell%jobs(i)%job_id > 0 .and. & |
| 512 | shell%jobs(i)%state == JOB_RUNNING) then |
| 513 | ret = c_waitpid(shell%jobs(i)%pgid, c_loc(wait_status), 0) |
| 514 | if (WIFEXITED(wait_status)) then |
| 515 | shell%jobs(i)%state = JOB_DONE |
| 516 | end if |
| 517 | end if |
| 518 | end do |
| 519 | else |
| 520 | ! Wait for specific job or PID |
| 521 | do i = 2, cmd%num_tokens |
| 522 | if (cmd%tokens(i)(1:1) == '%') then |
| 523 | ! Job syntax |
| 524 | read(cmd%tokens(i)(2:), *, iostat=iostat) target_pid |
| 525 | if (iostat == 0) then |
| 526 | target_pid = find_job_pgid(shell, target_pid) |
| 527 | else |
| 528 | write(error_unit, '(a)') 'wait: invalid job specification' |
| 529 | shell%last_exit_status = 1 |
| 530 | cycle |
| 531 | end if |
| 532 | else |
| 533 | read(cmd%tokens(i), *, iostat=iostat) target_pid |
| 534 | if (iostat /= 0) then |
| 535 | write(error_unit, '(a)') 'wait: invalid pid' |
| 536 | shell%last_exit_status = 1 |
| 537 | cycle |
| 538 | end if |
| 539 | end if |
| 540 | |
| 541 | if (target_pid > 0) then |
| 542 | ret = c_waitpid(int(target_pid, c_pid_t), c_loc(wait_status), 0) |
| 543 | if (ret > 0) then |
| 544 | if (WIFEXITED(wait_status)) then |
| 545 | shell%last_exit_status = WEXITSTATUS(wait_status) |
| 546 | else |
| 547 | shell%last_exit_status = 1 |
| 548 | end if |
| 549 | else |
| 550 | write(error_unit, '(a,i0)') 'wait: pid ', target_pid, ' is not a child of this shell' |
| 551 | shell%last_exit_status = 1 |
| 552 | end if |
| 553 | end if |
| 554 | end do |
| 555 | end if |
| 556 | |
| 557 | if (shell%last_exit_status /= 1) then |
| 558 | shell%last_exit_status = 0 |
| 559 | end if |
| 560 | end subroutine |
| 561 | |
| 562 | subroutine builtin_trap(cmd, shell) |
| 563 | type(command_t), intent(in) :: cmd |
| 564 | type(shell_state_t), intent(inout) :: shell |
| 565 | |
| 566 | ! Simplified trap implementation - in a full shell this would |
| 567 | ! handle signal trap management |
| 568 | if (cmd%num_tokens < 3) then |
| 569 | write(error_unit, '(a)') 'trap: usage: trap action signal...' |
| 570 | shell%last_exit_status = 1 |
| 571 | return |
| 572 | end if |
| 573 | |
| 574 | ! For now, just acknowledge the trap command |
| 575 | write(output_unit, '(a)') 'trap: signal trapping not yet fully implemented' |
| 576 | shell%last_exit_status = 0 |
| 577 | end subroutine |
| 578 | |
| 579 | subroutine builtin_config(cmd, shell) |
| 580 | type(command_t), intent(in) :: cmd |
| 581 | type(shell_state_t), intent(inout) :: shell |
| 582 | |
| 583 | if (cmd%num_tokens == 1) then |
| 584 | ! Show current config |
| 585 | call show_config() |
| 586 | else |
| 587 | select case(trim(cmd%tokens(2))) |
| 588 | case('show') |
| 589 | call show_config() |
| 590 | case('create') |
| 591 | call create_default_config() |
| 592 | case('reload') |
| 593 | call load_config_file(shell) |
| 594 | case default |
| 595 | write(error_unit, '(a)') 'config: usage: config [show|create|reload]' |
| 596 | shell%last_exit_status = 1 |
| 597 | return |
| 598 | end select |
| 599 | end if |
| 600 | |
| 601 | shell%last_exit_status = 0 |
| 602 | end subroutine |
| 603 | |
| 604 | subroutine builtin_alias(cmd, shell) |
| 605 | type(command_t), intent(in) :: cmd |
| 606 | type(shell_state_t), intent(inout) :: shell |
| 607 | integer :: eq_pos |
| 608 | character(len=256) :: alias_name, alias_command |
| 609 | |
| 610 | if (cmd%num_tokens == 1) then |
| 611 | ! Show all aliases |
| 612 | call show_aliases(shell) |
| 613 | else if (cmd%num_tokens == 2) then |
| 614 | ! Check for alias=command format |
| 615 | eq_pos = index(cmd%tokens(2), '=') |
| 616 | if (eq_pos > 0) then |
| 617 | alias_name = cmd%tokens(2)(:eq_pos-1) |
| 618 | alias_command = cmd%tokens(2)(eq_pos+1:) |
| 619 | |
| 620 | ! Remove quotes if present |
| 621 | if (alias_command(1:1) == '"' .and. alias_command(len_trim(alias_command):len_trim(alias_command)) == '"') then |
| 622 | alias_command = alias_command(2:len_trim(alias_command)-1) |
| 623 | else if (alias_command(1:1) == "'" .and. alias_command(len_trim(alias_command):len_trim(alias_command)) == "'") then |
| 624 | alias_command = alias_command(2:len_trim(alias_command)-1) |
| 625 | end if |
| 626 | |
| 627 | call set_alias(shell, trim(alias_name), trim(alias_command)) |
| 628 | else |
| 629 | ! Show specific alias |
| 630 | alias_name = cmd%tokens(2) |
| 631 | alias_command = get_alias(shell, trim(alias_name)) |
| 632 | if (len(alias_command) > 0) then |
| 633 | write(output_unit, '(a)') 'alias ' // trim(alias_name) // & |
| 634 | '=' // "'" // trim(alias_command) // "'" |
| 635 | else |
| 636 | write(error_unit, '(a)') 'alias: ' // trim(alias_name) // ': not found' |
| 637 | shell%last_exit_status = 1 |
| 638 | return |
| 639 | end if |
| 640 | end if |
| 641 | else |
| 642 | write(error_unit, '(a)') 'alias: usage: alias [name[=value]...]' |
| 643 | shell%last_exit_status = 1 |
| 644 | return |
| 645 | end if |
| 646 | |
| 647 | shell%last_exit_status = 0 |
| 648 | end subroutine |
| 649 | |
| 650 | subroutine builtin_unalias(cmd, shell) |
| 651 | type(command_t), intent(in) :: cmd |
| 652 | type(shell_state_t), intent(inout) :: shell |
| 653 | integer :: i |
| 654 | |
| 655 | if (cmd%num_tokens < 2) then |
| 656 | write(error_unit, '(a)') 'unalias: usage: unalias name...' |
| 657 | shell%last_exit_status = 1 |
| 658 | return |
| 659 | end if |
| 660 | |
| 661 | ! Remove each specified alias |
| 662 | do i = 2, cmd%num_tokens |
| 663 | call unset_alias(shell, trim(cmd%tokens(i))) |
| 664 | end do |
| 665 | |
| 666 | shell%last_exit_status = 0 |
| 667 | end subroutine |
| 668 | |
| 669 | subroutine builtin_help(cmd, shell) |
| 670 | type(command_t), intent(in) :: cmd |
| 671 | type(shell_state_t), intent(inout) :: shell |
| 672 | |
| 673 | write(output_unit, '(a)') 'Fortran Shell (fortsh) - Built-in Commands:' |
| 674 | write(output_unit, '(a)') '========================================' |
| 675 | write(output_unit, '(a)') '' |
| 676 | write(output_unit, '(a)') 'Navigation & Files:' |
| 677 | write(output_unit, '(a)') ' cd [dir] - Change directory (use cd ~ for home)' |
| 678 | write(output_unit, '(a)') ' pwd - Print working directory' |
| 679 | write(output_unit, '(a)') '' |
| 680 | write(output_unit, '(a)') 'Variables & Environment:' |
| 681 | write(output_unit, '(a)') ' export VAR=val - Set environment variable' |
| 682 | write(output_unit, '(a)') ' echo [args] - Display text' |
| 683 | write(output_unit, '(a)') '' |
| 684 | write(output_unit, '(a)') 'Job Control:' |
| 685 | write(output_unit, '(a)') ' jobs - List active jobs' |
| 686 | write(output_unit, '(a)') ' fg [%n] - Bring job to foreground' |
| 687 | write(output_unit, '(a)') ' bg [%n] - Send job to background' |
| 688 | write(output_unit, '(a)') ' kill [-sig] pid - Send signal to process' |
| 689 | write(output_unit, '(a)') ' wait [pid] - Wait for process to complete' |
| 690 | write(output_unit, '(a)') '' |
| 691 | write(output_unit, '(a)') 'Shell Features:' |
| 692 | write(output_unit, '(a)') ' history - Show command history' |
| 693 | write(output_unit, '(a)') ' alias [n=cmd] - Create/show command aliases' |
| 694 | write(output_unit, '(a)') ' unalias name - Remove alias' |
| 695 | write(output_unit, '(a)') ' config [cmd] - Manage shell configuration (.fshrc)' |
| 696 | write(output_unit, '(a)') '' |
| 697 | write(output_unit, '(a)') 'Control Flow:' |
| 698 | write(output_unit, '(a)') ' test / [ ] - Evaluate conditions' |
| 699 | write(output_unit, '(a)') ' if/then/else/fi - Conditional execution' |
| 700 | write(output_unit, '(a)') ' while/do/done - Loop constructs' |
| 701 | write(output_unit, '(a)') '' |
| 702 | write(output_unit, '(a)') 'Other:' |
| 703 | write(output_unit, '(a)') ' source file - Execute script (not yet implemented)' |
| 704 | write(output_unit, '(a)') ' trap - Signal handling (basic support)' |
| 705 | write(output_unit, '(a)') ' rawtest - Test raw terminal input (interactive only)' |
| 706 | write(output_unit, '(a)') ' help - Show this help message' |
| 707 | write(output_unit, '(a)') ' exit [code] - Exit shell' |
| 708 | write(output_unit, '(a)') '' |
| 709 | write(output_unit, '(a)') 'Interactive Editing (available in interactive mode):' |
| 710 | write(output_unit, '(a)') ' ↑/↓ - Navigate command history' |
| 711 | write(output_unit, '(a)') ' ←/→, Ctrl+B/F - Move cursor left/right' |
| 712 | write(output_unit, '(a)') ' Ctrl+A - Move to beginning of line (Home)' |
| 713 | write(output_unit, '(a)') ' Ctrl+E - Move to end of line (End)' |
| 714 | write(output_unit, '(a)') ' Tab - Smart command/file completion' |
| 715 | write(output_unit, '(a)') ' Ctrl+K - Kill text to end of line' |
| 716 | write(output_unit, '(a)') ' Ctrl+U - Kill entire line' |
| 717 | write(output_unit, '(a)') ' Ctrl+W - Kill previous word' |
| 718 | write(output_unit, '(a)') ' Ctrl+Y - Yank (paste) killed text' |
| 719 | write(output_unit, '(a)') ' Ctrl+L - Clear screen' |
| 720 | write(output_unit, '(a)') '' |
| 721 | write(output_unit, '(a)') 'Features: Advanced readline, tab completion, history, aliases, job control' |
| 722 | |
| 723 | shell%last_exit_status = 0 |
| 724 | end subroutine |
| 725 | |
| 726 | subroutine builtin_perf(cmd, shell) |
| 727 | type(command_t), intent(in) :: cmd |
| 728 | type(shell_state_t), intent(inout) :: shell |
| 729 | |
| 730 | if (cmd%num_tokens > 1) then |
| 731 | select case(trim(cmd%tokens(2))) |
| 732 | case('on') |
| 733 | call set_performance_monitoring(.true.) |
| 734 | write(output_unit, '(a)') 'Performance monitoring enabled' |
| 735 | case('off') |
| 736 | call set_performance_monitoring(.false.) |
| 737 | write(output_unit, '(a)') 'Performance monitoring disabled' |
| 738 | case('stats', 'status') |
| 739 | call print_performance_stats() |
| 740 | case('reset') |
| 741 | total_commands = 0 |
| 742 | total_parse_time = 0 |
| 743 | total_exec_time = 0 |
| 744 | total_glob_time = 0 |
| 745 | write(output_unit, '(a)') 'Performance counters reset' |
| 746 | case default |
| 747 | write(error_unit, '(a)') 'perf: Usage: perf [on|off|stats|reset]' |
| 748 | shell%last_exit_status = 1 |
| 749 | return |
| 750 | end select |
| 751 | else |
| 752 | ! Show current status |
| 753 | if (perf_monitoring_enabled) then |
| 754 | write(output_unit, '(a)') 'Performance monitoring: ENABLED' |
| 755 | else |
| 756 | write(output_unit, '(a)') 'Performance monitoring: DISABLED' |
| 757 | end if |
| 758 | write(output_unit, '(a,i0)') 'Commands processed: ', total_commands |
| 759 | write(output_unit, '(a,i0,a)') 'Memory usage: ', get_memory_usage(), ' KB' |
| 760 | end if |
| 761 | |
| 762 | shell%last_exit_status = 0 |
| 763 | end subroutine |
| 764 | |
| 765 | subroutine builtin_memory(cmd, shell) |
| 766 | type(command_t), intent(in) :: cmd |
| 767 | type(shell_state_t), intent(inout) :: shell |
| 768 | |
| 769 | if (cmd%num_tokens > 1) then |
| 770 | select case(trim(cmd%tokens(2))) |
| 771 | case('optimize') |
| 772 | call optimize_memory_pools() |
| 773 | write(output_unit, '(a)') 'Memory pools optimized' |
| 774 | case('stats') |
| 775 | call print_pool_stats() |
| 776 | case('auto') |
| 777 | call auto_optimize_memory() |
| 778 | write(output_unit, '(a)') 'Auto memory optimization triggered' |
| 779 | case default |
| 780 | write(error_unit, '(a)') 'memory: Usage: memory [optimize|stats|auto]' |
| 781 | shell%last_exit_status = 1 |
| 782 | return |
| 783 | end select |
| 784 | else |
| 785 | ! Show memory status |
| 786 | write(output_unit, '(a)') 'Memory Usage Summary:' |
| 787 | write(output_unit, '(a)') '====================' |
| 788 | write(output_unit, '(a,i0)') 'Current allocations: ', current_allocations |
| 789 | write(output_unit, '(a,i0)') 'Peak allocations: ', peak_allocations |
| 790 | write(output_unit, '(a,i0,a)') 'Current memory: ', current_memory_used, ' bytes' |
| 791 | write(output_unit, '(a,i0,a)') 'Peak memory: ', peak_memory_used, ' bytes' |
| 792 | |
| 793 | if (needs_memory_optimization()) then |
| 794 | write(output_unit, '(a)') '' |
| 795 | write(output_unit, '(a)') 'Tip: Memory optimization recommended. Run "memory optimize"' |
| 796 | end if |
| 797 | end if |
| 798 | |
| 799 | shell%last_exit_status = 0 |
| 800 | end subroutine |
| 801 | |
| 802 | subroutine builtin_rawtest(cmd, shell) |
| 803 | type(command_t), intent(in) :: cmd |
| 804 | type(shell_state_t), intent(inout) :: shell |
| 805 | type(termios_t) :: original_termios |
| 806 | character :: ch |
| 807 | logical :: success |
| 808 | integer :: char_code |
| 809 | |
| 810 | write(output_unit, '(a)') 'Raw mode test - press keys to see codes, q to quit:' |
| 811 | write(output_unit, '(a)') 'Entering raw mode...' |
| 812 | |
| 813 | ! Enable raw mode |
| 814 | success = enable_raw_mode(original_termios) |
| 815 | if (.not. success) then |
| 816 | write(error_unit, '(a)') 'rawtest: Failed to enable raw mode' |
| 817 | shell%last_exit_status = 1 |
| 818 | return |
| 819 | end if |
| 820 | |
| 821 | ! Read characters until 'q' is pressed |
| 822 | do |
| 823 | success = read_single_char(ch) |
| 824 | if (.not. success) exit |
| 825 | |
| 826 | char_code = iachar(ch) |
| 827 | |
| 828 | ! Exit on 'q' |
| 829 | if (ch == 'q' .or. ch == 'Q') exit |
| 830 | |
| 831 | ! Handle special characters |
| 832 | if (char_code == 27) then |
| 833 | ! Escape sequence - try to read more |
| 834 | write(output_unit, '(a)', advance='no') 'ESC ' |
| 835 | success = read_single_char(ch) |
| 836 | if (success) then |
| 837 | write(output_unit, '(a,i0)', advance='no') '[', iachar(ch) |
| 838 | if (ch == '[') then |
| 839 | success = read_single_char(ch) |
| 840 | if (success) then |
| 841 | write(output_unit, '(a,i0,a)', advance='no') '[', iachar(ch), '] = ' |
| 842 | select case(ch) |
| 843 | case('A') |
| 844 | write(output_unit, '(a)') 'UP ARROW' |
| 845 | case('B') |
| 846 | write(output_unit, '(a)') 'DOWN ARROW' |
| 847 | case('C') |
| 848 | write(output_unit, '(a)') 'RIGHT ARROW' |
| 849 | case('D') |
| 850 | write(output_unit, '(a)') 'LEFT ARROW' |
| 851 | case default |
| 852 | write(output_unit, '(a)') 'UNKNOWN ESCAPE' |
| 853 | end select |
| 854 | end if |
| 855 | else |
| 856 | write(output_unit, '(a)') '] = ALT+key' |
| 857 | end if |
| 858 | end if |
| 859 | else if (char_code < 32) then |
| 860 | ! Control character |
| 861 | write(output_unit, '(a,i0,a)') 'CTRL+', char_code, ' (^', char(char_code + 64), ')' |
| 862 | else if (char_code == 127) then |
| 863 | write(output_unit, '(a)') 'BACKSPACE/DELETE (127)' |
| 864 | else |
| 865 | ! Regular character |
| 866 | write(output_unit, '(a,a,a,i0,a)') 'Regular: ''', ch, ''' (', char_code, ')' |
| 867 | end if |
| 868 | end do |
| 869 | |
| 870 | ! Restore terminal |
| 871 | success = restore_terminal(original_termios) |
| 872 | if (.not. success) then |
| 873 | write(error_unit, '(a)') 'rawtest: Warning - failed to restore terminal' |
| 874 | end if |
| 875 | |
| 876 | write(output_unit, '(a)') '' |
| 877 | write(output_unit, '(a)') 'Raw mode test completed.' |
| 878 | shell%last_exit_status = 0 |
| 879 | end subroutine |
| 880 | |
| 881 | subroutine builtin_defun(cmd, shell) |
| 882 | type(command_t), intent(in) :: cmd |
| 883 | type(shell_state_t), intent(inout) :: shell |
| 884 | |
| 885 | character(len=1024) :: function_body(1) |
| 886 | character(len=256) :: func_name |
| 887 | |
| 888 | if (cmd%num_tokens < 3) then |
| 889 | write(error_unit, '(a)') 'defun: usage: defun function_name "command1; command2"' |
| 890 | shell%last_exit_status = 1 |
| 891 | return |
| 892 | end if |
| 893 | |
| 894 | func_name = trim(cmd%tokens(2)) |
| 895 | function_body(1) = trim(cmd%tokens(3)) |
| 896 | |
| 897 | call add_function(shell, func_name, function_body, 1) |
| 898 | write(output_unit, '(a)') 'Function ' // trim(func_name) // ' defined' |
| 899 | shell%last_exit_status = 0 |
| 900 | end subroutine |
| 901 | |
| 902 | ! Coprocess built-in commands |
| 903 | subroutine builtin_coproc(cmd, shell) |
| 904 | type(command_t), intent(in) :: cmd |
| 905 | type(shell_state_t), intent(inout) :: shell |
| 906 | |
| 907 | character(len=256) :: coproc_name |
| 908 | character(len=1024) :: command |
| 909 | integer :: coproc_id |
| 910 | |
| 911 | if (cmd%num_tokens < 2) then |
| 912 | call list_coprocesses() |
| 913 | shell%last_exit_status = 0 |
| 914 | return |
| 915 | end if |
| 916 | |
| 917 | if (cmd%num_tokens == 2) then |
| 918 | ! coproc command |
| 919 | command = trim(cmd%tokens(2)) |
| 920 | coproc_id = start_coprocess(command) |
| 921 | else |
| 922 | ! coproc name command |
| 923 | coproc_name = trim(cmd%tokens(2)) |
| 924 | command = trim(cmd%tokens(3)) |
| 925 | coproc_id = start_coprocess(command, coproc_name) |
| 926 | end if |
| 927 | |
| 928 | if (coproc_id > 0) then |
| 929 | shell%last_exit_status = 0 |
| 930 | else |
| 931 | shell%last_exit_status = 1 |
| 932 | end if |
| 933 | end subroutine |
| 934 | |
| 935 | subroutine builtin_timeout(cmd, shell) |
| 936 | type(command_t), intent(in) :: cmd |
| 937 | type(shell_state_t), intent(inout) :: shell |
| 938 | |
| 939 | integer :: timeout_seconds, i |
| 940 | character(len=1024) :: command |
| 941 | |
| 942 | if (cmd%num_tokens < 3) then |
| 943 | write(error_unit, '(a)') 'timeout: usage: timeout DURATION COMMAND...' |
| 944 | shell%last_exit_status = 1 |
| 945 | return |
| 946 | end if |
| 947 | |
| 948 | read(cmd%tokens(2), *, iostat=i) timeout_seconds |
| 949 | if (i /= 0 .or. timeout_seconds <= 0) then |
| 950 | write(error_unit, '(a)') 'timeout: invalid duration' |
| 951 | shell%last_exit_status = 1 |
| 952 | return |
| 953 | end if |
| 954 | |
| 955 | ! Reconstruct command from remaining tokens |
| 956 | command = '' |
| 957 | do i = 3, cmd%num_tokens |
| 958 | if (i > 3) command = trim(command) // ' ' |
| 959 | command = trim(command) // trim(cmd%tokens(i)) |
| 960 | end do |
| 961 | |
| 962 | ! Execute command with timeout - placeholder |
| 963 | shell%last_exit_status = 0 |
| 964 | end subroutine |
| 965 | |
| 966 | ! ============================================================================= |
| 967 | ! POSIX Required Built-ins (Phase 10: Critical POSIX Compliance) |
| 968 | ! ============================================================================= |
| 969 | |
| 970 | subroutine builtin_type(cmd, shell) |
| 971 | type(command_t), intent(in) :: cmd |
| 972 | type(shell_state_t), intent(inout) :: shell |
| 973 | |
| 974 | character(len=256) :: command_name |
| 975 | integer :: i |
| 976 | |
| 977 | if (cmd%num_tokens < 2) then |
| 978 | write(error_unit, '(a)') 'type: usage: type name [name ...]' |
| 979 | shell%last_exit_status = 1 |
| 980 | return |
| 981 | end if |
| 982 | |
| 983 | do i = 2, cmd%num_tokens |
| 984 | command_name = trim(cmd%tokens(i)) |
| 985 | |
| 986 | if (is_builtin(command_name)) then |
| 987 | write(output_unit, '(a)') trim(command_name) // ' is a shell builtin' |
| 988 | else if (is_alias(shell, command_name)) then |
| 989 | write(output_unit, '(a)') trim(command_name) // ' is aliased to `' // & |
| 990 | trim(get_alias(shell, command_name)) // "'" |
| 991 | else if (is_function(shell, command_name)) then |
| 992 | write(output_unit, '(a)') trim(command_name) // ' is a function' |
| 993 | else |
| 994 | ! Try to find in PATH |
| 995 | call find_command_in_path(shell, command_name, .false., .false.) |
| 996 | if (shell%last_exit_status == 0) then |
| 997 | write(output_unit, '(a)') trim(command_name) // ' is hashed' |
| 998 | else |
| 999 | write(output_unit, '(a)') trim(command_name) // ': not found' |
| 1000 | shell%last_exit_status = 1 |
| 1001 | end if |
| 1002 | end if |
| 1003 | end do |
| 1004 | |
| 1005 | shell%last_exit_status = 0 |
| 1006 | end subroutine |
| 1007 | |
| 1008 | subroutine builtin_unset(cmd, shell) |
| 1009 | type(command_t), intent(in) :: cmd |
| 1010 | type(shell_state_t), intent(inout) :: shell |
| 1011 | |
| 1012 | logical :: unset_functions = .false. |
| 1013 | character(len=256) :: var_name |
| 1014 | integer :: i, j, start_idx |
| 1015 | |
| 1016 | if (cmd%num_tokens < 2) then |
| 1017 | write(error_unit, '(a)') 'unset: usage: unset [-f] name [name ...]' |
| 1018 | shell%last_exit_status = 1 |
| 1019 | return |
| 1020 | end if |
| 1021 | |
| 1022 | start_idx = 2 |
| 1023 | if (trim(cmd%tokens(2)) == '-f') then |
| 1024 | unset_functions = .true. |
| 1025 | start_idx = 3 |
| 1026 | if (cmd%num_tokens < 3) then |
| 1027 | write(error_unit, '(a)') 'unset: usage: unset [-f] name [name ...]' |
| 1028 | shell%last_exit_status = 1 |
| 1029 | return |
| 1030 | end if |
| 1031 | end if |
| 1032 | |
| 1033 | do i = start_idx, cmd%num_tokens |
| 1034 | var_name = trim(cmd%tokens(i)) |
| 1035 | |
| 1036 | if (unset_functions) then |
| 1037 | ! Unset function |
| 1038 | do j = 1, shell%num_functions |
| 1039 | if (trim(shell%functions(j)%name) == var_name) then |
| 1040 | shell%functions(j)%name = '' |
| 1041 | shell%functions(j)%body_lines = 0 |
| 1042 | if (allocated(shell%functions(j)%body)) deallocate(shell%functions(j)%body) |
| 1043 | exit |
| 1044 | end if |
| 1045 | end do |
| 1046 | else |
| 1047 | ! Unset variable |
| 1048 | do j = 1, shell%num_variables |
| 1049 | if (trim(shell%variables(j)%name) == var_name) then |
| 1050 | shell%variables(j)%name = '' |
| 1051 | shell%variables(j)%value = '' |
| 1052 | shell%variables(j)%is_array = .false. |
| 1053 | shell%variables(j)%is_assoc_array = .false. |
| 1054 | shell%variables(j)%array_size = 0 |
| 1055 | shell%variables(j)%assoc_size = 0 |
| 1056 | exit |
| 1057 | end if |
| 1058 | end do |
| 1059 | end if |
| 1060 | end do |
| 1061 | |
| 1062 | shell%last_exit_status = 0 |
| 1063 | end subroutine |
| 1064 | |
| 1065 | subroutine builtin_readonly(cmd, shell) |
| 1066 | type(command_t), intent(in) :: cmd |
| 1067 | type(shell_state_t), intent(inout) :: shell |
| 1068 | |
| 1069 | ! TODO: Implement proper readonly variable support |
| 1070 | ! For now, treat as regular variable assignment |
| 1071 | if (cmd%num_tokens < 2) then |
| 1072 | write(error_unit, '(a)') 'readonly: usage: readonly name[=value] ...' |
| 1073 | shell%last_exit_status = 1 |
| 1074 | return |
| 1075 | end if |
| 1076 | |
| 1077 | write(output_unit, '(a)') 'readonly: feature not fully implemented' |
| 1078 | shell%last_exit_status = 0 |
| 1079 | end subroutine |
| 1080 | |
| 1081 | subroutine builtin_shift(cmd, shell) |
| 1082 | type(command_t), intent(in) :: cmd |
| 1083 | type(shell_state_t), intent(inout) :: shell |
| 1084 | integer :: shift_count, iostat |
| 1085 | |
| 1086 | shift_count = 1 ! Default shift by 1 |
| 1087 | |
| 1088 | if (cmd%num_tokens > 1) then |
| 1089 | ! Parse shift count from argument |
| 1090 | read(cmd%tokens(2), *, iostat=iostat) shift_count |
| 1091 | if (iostat /= 0) then |
| 1092 | write(error_unit, '(a)') 'shift: numeric argument required' |
| 1093 | shell%last_exit_status = 1 |
| 1094 | return |
| 1095 | end if |
| 1096 | end if |
| 1097 | |
| 1098 | if (shift_count < 0) then |
| 1099 | write(error_unit, '(a)') 'shift: shift count out of range' |
| 1100 | shell%last_exit_status = 1 |
| 1101 | return |
| 1102 | end if |
| 1103 | |
| 1104 | if (shift_count > shell%num_positional) then |
| 1105 | write(error_unit, '(a)') 'shift: shift count out of range' |
| 1106 | shell%last_exit_status = 1 |
| 1107 | return |
| 1108 | end if |
| 1109 | |
| 1110 | call shift_positional_params(shell, shift_count) |
| 1111 | shell%last_exit_status = 0 |
| 1112 | end subroutine |
| 1113 | |
| 1114 | subroutine builtin_break(cmd, shell) |
| 1115 | type(command_t), intent(in) :: cmd |
| 1116 | type(shell_state_t), intent(inout) :: shell |
| 1117 | |
| 1118 | ! TODO: Implement proper loop breaking |
| 1119 | ! This requires control flow integration |
| 1120 | write(output_unit, '(a)') 'break: feature not fully implemented' |
| 1121 | shell%last_exit_status = 0 |
| 1122 | end subroutine |
| 1123 | |
| 1124 | subroutine builtin_continue(cmd, shell) |
| 1125 | type(command_t), intent(in) :: cmd |
| 1126 | type(shell_state_t), intent(inout) :: shell |
| 1127 | |
| 1128 | ! TODO: Implement proper loop continuation |
| 1129 | ! This requires control flow integration |
| 1130 | write(output_unit, '(a)') 'continue: feature not fully implemented' |
| 1131 | shell%last_exit_status = 0 |
| 1132 | end subroutine |
| 1133 | |
| 1134 | subroutine builtin_return(cmd, shell) |
| 1135 | type(command_t), intent(in) :: cmd |
| 1136 | type(shell_state_t), intent(inout) :: shell |
| 1137 | |
| 1138 | integer :: return_code = 0 |
| 1139 | |
| 1140 | if (cmd%num_tokens > 1) then |
| 1141 | read(cmd%tokens(2), *, iostat=return_code) return_code |
| 1142 | if (return_code /= 0) return_code = 0 |
| 1143 | end if |
| 1144 | |
| 1145 | ! TODO: Implement proper function return mechanism |
| 1146 | ! For now, just set exit status |
| 1147 | shell%last_exit_status = return_code |
| 1148 | end subroutine |
| 1149 | |
| 1150 | subroutine builtin_exec(cmd, shell) |
| 1151 | type(command_t), intent(in) :: cmd |
| 1152 | type(shell_state_t), intent(inout) :: shell |
| 1153 | |
| 1154 | ! TODO: Implement process replacement |
| 1155 | ! This is complex and requires careful implementation |
| 1156 | write(output_unit, '(a)') 'exec: feature not fully implemented' |
| 1157 | shell%last_exit_status = 0 |
| 1158 | end subroutine |
| 1159 | |
| 1160 | subroutine builtin_eval(cmd, shell) |
| 1161 | type(command_t), intent(in) :: cmd |
| 1162 | type(shell_state_t), intent(inout) :: shell |
| 1163 | |
| 1164 | character(len=2048) :: eval_command |
| 1165 | integer :: i |
| 1166 | |
| 1167 | if (cmd%num_tokens < 2) then |
| 1168 | shell%last_exit_status = 0 |
| 1169 | return |
| 1170 | end if |
| 1171 | |
| 1172 | ! Concatenate all arguments |
| 1173 | eval_command = trim(cmd%tokens(2)) |
| 1174 | do i = 3, cmd%num_tokens |
| 1175 | eval_command = trim(eval_command) // ' ' // trim(cmd%tokens(i)) |
| 1176 | end do |
| 1177 | |
| 1178 | ! TODO: Implement proper command parsing and execution |
| 1179 | ! For now, just echo what would be evaluated |
| 1180 | write(output_unit, '(a)') 'eval would execute: ' // trim(eval_command) |
| 1181 | shell%last_exit_status = 0 |
| 1182 | end subroutine |
| 1183 | |
| 1184 | subroutine builtin_hash(cmd, shell) |
| 1185 | type(command_t), intent(in) :: cmd |
| 1186 | type(shell_state_t), intent(inout) :: shell |
| 1187 | |
| 1188 | ! TODO: Implement command hashing |
| 1189 | write(output_unit, '(a)') 'hash: feature not fully implemented' |
| 1190 | shell%last_exit_status = 0 |
| 1191 | end subroutine |
| 1192 | |
| 1193 | subroutine builtin_umask(cmd, shell) |
| 1194 | type(command_t), intent(in) :: cmd |
| 1195 | type(shell_state_t), intent(inout) :: shell |
| 1196 | |
| 1197 | ! TODO: Implement file creation mask |
| 1198 | write(output_unit, '(a)') 'umask: feature not fully implemented' |
| 1199 | shell%last_exit_status = 0 |
| 1200 | end subroutine |
| 1201 | |
| 1202 | subroutine builtin_ulimit(cmd, shell) |
| 1203 | type(command_t), intent(in) :: cmd |
| 1204 | type(shell_state_t), intent(inout) :: shell |
| 1205 | |
| 1206 | ! TODO: Implement resource limits |
| 1207 | write(output_unit, '(a)') 'ulimit: feature not fully implemented' |
| 1208 | shell%last_exit_status = 0 |
| 1209 | end subroutine |
| 1210 | |
| 1211 | subroutine builtin_times(cmd, shell) |
| 1212 | type(command_t), intent(in) :: cmd |
| 1213 | type(shell_state_t), intent(inout) :: shell |
| 1214 | |
| 1215 | ! TODO: Implement process time reporting |
| 1216 | write(output_unit, '(a)') 'times: feature not fully implemented' |
| 1217 | shell%last_exit_status = 0 |
| 1218 | end subroutine |
| 1219 | |
| 1220 | end module builtins |