| 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 performance |
| 13 | use parser |
| 14 | use iso_fortran_env, only: output_unit, error_unit |
| 15 | implicit none |
| 16 | |
| 17 | contains |
| 18 | |
| 19 | function is_builtin(cmd_name) result(is_built) |
| 20 | character(len=*), intent(in) :: cmd_name |
| 21 | logical :: is_built |
| 22 | |
| 23 | is_built = (trim(cmd_name) == 'exit' .or. & |
| 24 | trim(cmd_name) == 'cd' .or. & |
| 25 | trim(cmd_name) == 'pwd' .or. & |
| 26 | trim(cmd_name) == 'export' .or. & |
| 27 | trim(cmd_name) == 'echo' .or. & |
| 28 | trim(cmd_name) == 'jobs' .or. & |
| 29 | trim(cmd_name) == 'fg' .or. & |
| 30 | trim(cmd_name) == 'bg' .or. & |
| 31 | trim(cmd_name) == 'source' .or. & |
| 32 | trim(cmd_name) == '.' .or. & |
| 33 | trim(cmd_name) == 'history' .or. & |
| 34 | trim(cmd_name) == 'kill' .or. & |
| 35 | trim(cmd_name) == 'wait' .or. & |
| 36 | trim(cmd_name) == 'trap' .or. & |
| 37 | trim(cmd_name) == 'config' .or. & |
| 38 | trim(cmd_name) == 'alias' .or. & |
| 39 | trim(cmd_name) == 'unalias' .or. & |
| 40 | trim(cmd_name) == 'help' .or. & |
| 41 | trim(cmd_name) == 'perf' .or. & |
| 42 | trim(cmd_name) == 'memory' .or. & |
| 43 | trim(cmd_name) == 'rawtest' .or. & |
| 44 | is_test_command(cmd_name)) |
| 45 | end function |
| 46 | |
| 47 | subroutine execute_builtin(cmd, shell) |
| 48 | type(command_t), intent(in) :: cmd |
| 49 | type(shell_state_t), intent(inout) :: shell |
| 50 | |
| 51 | select case(trim(cmd%tokens(1))) |
| 52 | case('exit') |
| 53 | call builtin_exit(cmd, shell) |
| 54 | case('cd') |
| 55 | call builtin_cd(cmd, shell) |
| 56 | case('pwd') |
| 57 | call builtin_pwd(cmd, shell) |
| 58 | case('export') |
| 59 | call builtin_export(cmd, shell) |
| 60 | case('echo') |
| 61 | call builtin_echo(cmd, shell) |
| 62 | case('jobs') |
| 63 | call builtin_jobs(cmd, shell) |
| 64 | case('fg') |
| 65 | call builtin_fg(cmd, shell) |
| 66 | case('bg') |
| 67 | call builtin_bg(cmd, shell) |
| 68 | case('source', '.') |
| 69 | call builtin_source(cmd, shell) |
| 70 | case('history') |
| 71 | call builtin_history(cmd, shell) |
| 72 | case('kill') |
| 73 | call builtin_kill(cmd, shell) |
| 74 | case('wait') |
| 75 | call builtin_wait(cmd, shell) |
| 76 | case('trap') |
| 77 | call builtin_trap(cmd, shell) |
| 78 | case('config') |
| 79 | call builtin_config(cmd, shell) |
| 80 | case('alias') |
| 81 | call builtin_alias(cmd, shell) |
| 82 | case('unalias') |
| 83 | call builtin_unalias(cmd, shell) |
| 84 | case('help') |
| 85 | call builtin_help(cmd, shell) |
| 86 | case('perf') |
| 87 | call builtin_perf(cmd, shell) |
| 88 | case('memory') |
| 89 | call builtin_memory(cmd, shell) |
| 90 | case('rawtest') |
| 91 | call builtin_rawtest(cmd, shell) |
| 92 | case('test', '[', '[[') |
| 93 | call execute_test_command(cmd, shell) |
| 94 | case default |
| 95 | ! Should not reach here if is_builtin works correctly |
| 96 | shell%last_exit_status = 1 |
| 97 | end select |
| 98 | end subroutine |
| 99 | |
| 100 | subroutine builtin_exit(cmd, shell) |
| 101 | type(command_t), intent(in) :: cmd |
| 102 | type(shell_state_t), intent(inout) :: shell |
| 103 | |
| 104 | shell%running = .false. |
| 105 | if (cmd%num_tokens > 1) then |
| 106 | read(cmd%tokens(2), *, iostat=shell%last_exit_status) shell%last_exit_status |
| 107 | end if |
| 108 | end subroutine |
| 109 | |
| 110 | subroutine builtin_cd(cmd, shell) |
| 111 | type(command_t), intent(in) :: cmd |
| 112 | type(shell_state_t), intent(inout) :: shell |
| 113 | character(len=:), allocatable :: target_dir |
| 114 | |
| 115 | if (cmd%num_tokens == 1) then |
| 116 | target_dir = get_environment_var('HOME') |
| 117 | else |
| 118 | target_dir = trim(cmd%tokens(2)) |
| 119 | end if |
| 120 | |
| 121 | if (change_directory(target_dir)) then |
| 122 | shell%cwd = get_current_directory() |
| 123 | shell%last_exit_status = 0 |
| 124 | else |
| 125 | write(error_unit, '(a)') 'cd: cannot access ' // trim(target_dir) // & |
| 126 | ': No such file or directory. Use "pwd" to see current location.' |
| 127 | shell%last_exit_status = 1 |
| 128 | end if |
| 129 | end subroutine |
| 130 | |
| 131 | subroutine builtin_pwd(cmd, shell) |
| 132 | type(command_t), intent(in) :: cmd |
| 133 | type(shell_state_t), intent(inout) :: shell |
| 134 | |
| 135 | write(output_unit, '(a)') trim(shell%cwd) |
| 136 | shell%last_exit_status = 0 |
| 137 | end subroutine |
| 138 | |
| 139 | subroutine builtin_export(cmd, shell) |
| 140 | type(command_t), intent(in) :: cmd |
| 141 | type(shell_state_t), intent(inout) :: shell |
| 142 | integer :: eq_pos |
| 143 | character(len=MAX_TOKEN_LEN) :: var_name, var_value |
| 144 | |
| 145 | if (cmd%num_tokens < 2) then |
| 146 | write(error_unit, '(a)') 'export: usage: export VAR=value' |
| 147 | shell%last_exit_status = 1 |
| 148 | return |
| 149 | end if |
| 150 | |
| 151 | eq_pos = index(cmd%tokens(2), '=') |
| 152 | if (eq_pos > 0) then |
| 153 | var_name = cmd%tokens(2)(:eq_pos-1) |
| 154 | var_value = cmd%tokens(2)(eq_pos+1:) |
| 155 | |
| 156 | if (set_environment_var(trim(var_name), trim(var_value))) then |
| 157 | shell%last_exit_status = 0 |
| 158 | else |
| 159 | write(error_unit, '(a)') 'export: failed to set variable' |
| 160 | shell%last_exit_status = 1 |
| 161 | end if |
| 162 | else |
| 163 | write(error_unit, '(a)') 'export: usage: export VAR=value' |
| 164 | shell%last_exit_status = 1 |
| 165 | end if |
| 166 | end subroutine |
| 167 | |
| 168 | subroutine builtin_echo(cmd, shell) |
| 169 | type(command_t), intent(in) :: cmd |
| 170 | type(shell_state_t), intent(inout) :: shell |
| 171 | integer :: i |
| 172 | logical :: first |
| 173 | |
| 174 | ! Simple echo implementation |
| 175 | if (.not. allocated(cmd%tokens) .or. cmd%num_tokens < 1) then |
| 176 | write(*,'(a)') '' |
| 177 | shell%last_exit_status = 0 |
| 178 | return |
| 179 | end if |
| 180 | |
| 181 | first = .true. |
| 182 | do i = 2, cmd%num_tokens |
| 183 | if (.not. first) write(*,'(a)',advance='no') ' ' |
| 184 | write(*,'(a)',advance='no') trim(cmd%tokens(i)) |
| 185 | first = .false. |
| 186 | end do |
| 187 | write(*,'(a)') '' |
| 188 | |
| 189 | shell%last_exit_status = 0 |
| 190 | end subroutine |
| 191 | |
| 192 | subroutine builtin_jobs(cmd, shell) |
| 193 | type(command_t), intent(in) :: cmd |
| 194 | type(shell_state_t), intent(inout) :: shell |
| 195 | logical :: show_pids |
| 196 | |
| 197 | ! Check for -p flag to show PIDs |
| 198 | show_pids = .false. |
| 199 | if (cmd%num_tokens > 1 .and. trim(cmd%tokens(2)) == '-p') then |
| 200 | show_pids = .true. |
| 201 | end if |
| 202 | |
| 203 | call list_jobs(shell, show_pids) |
| 204 | shell%last_exit_status = 0 |
| 205 | end subroutine |
| 206 | |
| 207 | subroutine builtin_fg(cmd, shell) |
| 208 | type(command_t), intent(in) :: cmd |
| 209 | type(shell_state_t), intent(inout) :: shell |
| 210 | integer :: job_id, iostat, i |
| 211 | |
| 212 | if (cmd%num_tokens < 2) then |
| 213 | ! Bring most recent stopped job to foreground |
| 214 | job_id = 0 |
| 215 | do i = MAX_JOBS, 1, -1 |
| 216 | if (shell%jobs(i)%job_id > 0 .and. shell%jobs(i)%state == JOB_STOPPED) then |
| 217 | job_id = shell%jobs(i)%job_id |
| 218 | exit |
| 219 | end if |
| 220 | end do |
| 221 | |
| 222 | if (job_id == 0) then |
| 223 | write(error_unit, '(a)') 'fg: no stopped job' |
| 224 | shell%last_exit_status = 1 |
| 225 | return |
| 226 | end if |
| 227 | else |
| 228 | ! Parse job number (handle %n syntax) |
| 229 | if (cmd%tokens(2)(1:1) == '%') then |
| 230 | read(cmd%tokens(2)(2:), *, iostat=iostat) job_id |
| 231 | else |
| 232 | read(cmd%tokens(2), *, iostat=iostat) job_id |
| 233 | end if |
| 234 | |
| 235 | if (iostat /= 0) then |
| 236 | write(error_unit, '(a)') 'fg: invalid job id' |
| 237 | shell%last_exit_status = 1 |
| 238 | return |
| 239 | end if |
| 240 | end if |
| 241 | |
| 242 | call resume_job_fg(shell, job_id) |
| 243 | end subroutine |
| 244 | |
| 245 | subroutine builtin_bg(cmd, shell) |
| 246 | type(command_t), intent(in) :: cmd |
| 247 | type(shell_state_t), intent(inout) :: shell |
| 248 | integer :: job_id, iostat, i |
| 249 | |
| 250 | if (cmd%num_tokens < 2) then |
| 251 | ! Continue most recent stopped job in background |
| 252 | job_id = 0 |
| 253 | do i = MAX_JOBS, 1, -1 |
| 254 | if (shell%jobs(i)%job_id > 0 .and. & |
| 255 | shell%jobs(i)%state == JOB_STOPPED) then |
| 256 | job_id = shell%jobs(i)%job_id |
| 257 | exit |
| 258 | end if |
| 259 | end do |
| 260 | |
| 261 | if (job_id == 0) then |
| 262 | write(error_unit, '(a)') 'bg: no stopped job' |
| 263 | shell%last_exit_status = 1 |
| 264 | return |
| 265 | end if |
| 266 | else |
| 267 | ! Parse job number (handle %n syntax) |
| 268 | if (cmd%tokens(2)(1:1) == '%') then |
| 269 | read(cmd%tokens(2)(2:), *, iostat=iostat) job_id |
| 270 | else |
| 271 | read(cmd%tokens(2), *, iostat=iostat) job_id |
| 272 | end if |
| 273 | |
| 274 | if (iostat /= 0) then |
| 275 | write(error_unit, '(a)') 'bg: invalid job id' |
| 276 | shell%last_exit_status = 1 |
| 277 | return |
| 278 | end if |
| 279 | end if |
| 280 | |
| 281 | call resume_job_bg(shell, job_id) |
| 282 | end subroutine |
| 283 | |
| 284 | subroutine builtin_source(cmd, shell) |
| 285 | type(command_t), intent(in) :: cmd |
| 286 | type(shell_state_t), intent(inout) :: shell |
| 287 | |
| 288 | character(len=1024) :: filename |
| 289 | logical :: file_exists |
| 290 | |
| 291 | ! Check if filename provided |
| 292 | if (cmd%num_tokens < 2) then |
| 293 | write(error_unit, '(a)') 'source: usage: source filename [arguments...]' |
| 294 | shell%last_exit_status = 1 |
| 295 | return |
| 296 | end if |
| 297 | |
| 298 | filename = trim(cmd%tokens(2)) |
| 299 | |
| 300 | ! Check if file exists and is readable |
| 301 | inquire(file=filename, exist=file_exists) |
| 302 | if (.not. file_exists) then |
| 303 | write(error_unit, '(a)') 'source: ' // trim(filename) // ': No such file or directory' |
| 304 | shell%last_exit_status = 1 |
| 305 | return |
| 306 | end if |
| 307 | |
| 308 | ! Mark the shell to source this file on next main loop iteration |
| 309 | ! This avoids circular dependency issues |
| 310 | shell%source_file = filename |
| 311 | shell%should_source = .true. |
| 312 | shell%last_exit_status = 0 |
| 313 | |
| 314 | write(output_unit, '(a)') 'source: ' // trim(filename) // ' queued for execution' |
| 315 | end subroutine |
| 316 | |
| 317 | subroutine builtin_history(cmd, shell) |
| 318 | type(command_t), intent(in) :: cmd |
| 319 | type(shell_state_t), intent(inout) :: shell |
| 320 | |
| 321 | ! Handle history command options |
| 322 | if (cmd%num_tokens > 1) then |
| 323 | select case(trim(cmd%tokens(2))) |
| 324 | case('-c', '--clear') |
| 325 | call clear_history() |
| 326 | write(output_unit, '(a)') 'Command history cleared.' |
| 327 | case default |
| 328 | write(error_unit, '(a)') 'history: unknown option' |
| 329 | shell%last_exit_status = 1 |
| 330 | return |
| 331 | end select |
| 332 | else |
| 333 | ! Show all history |
| 334 | call show_history() |
| 335 | end if |
| 336 | |
| 337 | shell%last_exit_status = 0 |
| 338 | end subroutine |
| 339 | |
| 340 | subroutine builtin_kill(cmd, shell) |
| 341 | type(command_t), intent(in) :: cmd |
| 342 | type(shell_state_t), intent(inout) :: shell |
| 343 | integer :: signal_num, target_pid, iostat, ret |
| 344 | integer :: i, arg_start |
| 345 | logical :: found_signal |
| 346 | |
| 347 | signal_num = 15 ! Default: SIGTERM |
| 348 | arg_start = 2 |
| 349 | found_signal = .false. |
| 350 | |
| 351 | if (cmd%num_tokens < 2) then |
| 352 | write(error_unit, '(a)') 'kill: usage: kill [-signal] pid...' |
| 353 | shell%last_exit_status = 1 |
| 354 | return |
| 355 | end if |
| 356 | |
| 357 | ! Check if first argument is a signal specifier or -l flag |
| 358 | if (cmd%tokens(2)(1:1) == '-') then |
| 359 | if (len_trim(cmd%tokens(2)) > 1) then |
| 360 | ! Check for -l flag (list signals) |
| 361 | if (trim(cmd%tokens(2)) == '-l') then |
| 362 | write(output_unit, '(a)') 'Available signals:' |
| 363 | write(output_unit, '(a)') ' 1) SIGHUP 2) SIGINT 3) SIGQUIT 4) SIGILL' |
| 364 | write(output_unit, '(a)') ' 5) SIGTRAP 6) SIGABRT 7) SIGBUS 8) SIGFPE' |
| 365 | write(output_unit, '(a)') ' 9) SIGKILL 10) SIGUSR1 11) SIGSEGV 12) SIGUSR2' |
| 366 | write(output_unit, '(a)') ' 13) SIGPIPE 14) SIGALRM 15) SIGTERM 16) SIGSTKFLT' |
| 367 | write(output_unit, '(a)') ' 17) SIGCHLD 18) SIGCONT 19) SIGSTOP 20) SIGTSTP' |
| 368 | write(output_unit, '(a)') ' 21) SIGTTIN 22) SIGTTOU' |
| 369 | shell%last_exit_status = 0 |
| 370 | return |
| 371 | end if |
| 372 | |
| 373 | read(cmd%tokens(2)(2:), *, iostat=iostat) signal_num |
| 374 | if (iostat /= 0) then |
| 375 | ! Try named signals |
| 376 | select case(trim(cmd%tokens(2)(2:))) |
| 377 | case('TERM', 'term') |
| 378 | signal_num = 15 |
| 379 | case('KILL', 'kill') |
| 380 | signal_num = 9 |
| 381 | case('INT', 'int') |
| 382 | signal_num = 2 |
| 383 | case('STOP', 'stop') |
| 384 | signal_num = 19 |
| 385 | case('CONT', 'cont') |
| 386 | signal_num = 18 |
| 387 | case('HUP', 'hup') |
| 388 | signal_num = 1 |
| 389 | case('QUIT', 'quit') |
| 390 | signal_num = 3 |
| 391 | case default |
| 392 | write(error_unit, '(a)') 'kill: invalid signal specification' |
| 393 | shell%last_exit_status = 1 |
| 394 | return |
| 395 | end select |
| 396 | end if |
| 397 | found_signal = .true. |
| 398 | arg_start = 3 |
| 399 | end if |
| 400 | end if |
| 401 | |
| 402 | if (cmd%num_tokens < arg_start) then |
| 403 | write(error_unit, '(a)') 'kill: usage: kill [-signal] pid...' |
| 404 | shell%last_exit_status = 1 |
| 405 | return |
| 406 | end if |
| 407 | |
| 408 | ! Kill each specified process |
| 409 | do i = arg_start, cmd%num_tokens |
| 410 | ! Handle job syntax (%n) |
| 411 | if (cmd%tokens(i)(1:1) == '%') then |
| 412 | read(cmd%tokens(i)(2:), *, iostat=iostat) target_pid |
| 413 | if (iostat == 0) then |
| 414 | ! Find job by job_id and get its pgid |
| 415 | target_pid = find_job_pgid(shell, target_pid) |
| 416 | if (target_pid <= 0) then |
| 417 | write(error_unit, '(a)') 'kill: no such job' |
| 418 | shell%last_exit_status = 1 |
| 419 | cycle |
| 420 | end if |
| 421 | target_pid = -target_pid ! Kill entire process group |
| 422 | else |
| 423 | write(error_unit, '(a)') 'kill: invalid job specification' |
| 424 | shell%last_exit_status = 1 |
| 425 | cycle |
| 426 | end if |
| 427 | else |
| 428 | read(cmd%tokens(i), *, iostat=iostat) target_pid |
| 429 | if (iostat /= 0) then |
| 430 | write(error_unit, '(a)') 'kill: invalid pid' |
| 431 | shell%last_exit_status = 1 |
| 432 | cycle |
| 433 | end if |
| 434 | end if |
| 435 | |
| 436 | ret = c_kill(int(target_pid, c_pid_t), int(signal_num, c_int)) |
| 437 | if (ret /= 0) then |
| 438 | write(error_unit, '(a,i0)') 'kill: failed to kill process ', target_pid |
| 439 | shell%last_exit_status = 1 |
| 440 | end if |
| 441 | end do |
| 442 | |
| 443 | if (shell%last_exit_status /= 1) then |
| 444 | shell%last_exit_status = 0 |
| 445 | end if |
| 446 | end subroutine |
| 447 | |
| 448 | |
| 449 | subroutine builtin_wait(cmd, shell) |
| 450 | type(command_t), intent(in) :: cmd |
| 451 | type(shell_state_t), intent(inout) :: shell |
| 452 | integer :: target_pid, iostat, ret |
| 453 | integer(c_int), target :: wait_status |
| 454 | integer :: i |
| 455 | |
| 456 | if (cmd%num_tokens == 1) then |
| 457 | ! Wait for all background jobs |
| 458 | do i = 1, MAX_JOBS |
| 459 | if (shell%jobs(i)%job_id > 0 .and. & |
| 460 | shell%jobs(i)%state == JOB_RUNNING) then |
| 461 | ret = c_waitpid(shell%jobs(i)%pgid, c_loc(wait_status), 0) |
| 462 | if (WIFEXITED(wait_status)) then |
| 463 | shell%jobs(i)%state = JOB_DONE |
| 464 | end if |
| 465 | end if |
| 466 | end do |
| 467 | else |
| 468 | ! Wait for specific job or PID |
| 469 | do i = 2, cmd%num_tokens |
| 470 | if (cmd%tokens(i)(1:1) == '%') then |
| 471 | ! Job syntax |
| 472 | read(cmd%tokens(i)(2:), *, iostat=iostat) target_pid |
| 473 | if (iostat == 0) then |
| 474 | target_pid = find_job_pgid(shell, target_pid) |
| 475 | else |
| 476 | write(error_unit, '(a)') 'wait: invalid job specification' |
| 477 | shell%last_exit_status = 1 |
| 478 | cycle |
| 479 | end if |
| 480 | else |
| 481 | read(cmd%tokens(i), *, iostat=iostat) target_pid |
| 482 | if (iostat /= 0) then |
| 483 | write(error_unit, '(a)') 'wait: invalid pid' |
| 484 | shell%last_exit_status = 1 |
| 485 | cycle |
| 486 | end if |
| 487 | end if |
| 488 | |
| 489 | if (target_pid > 0) then |
| 490 | ret = c_waitpid(int(target_pid, c_pid_t), c_loc(wait_status), 0) |
| 491 | if (ret > 0) then |
| 492 | if (WIFEXITED(wait_status)) then |
| 493 | shell%last_exit_status = WEXITSTATUS(wait_status) |
| 494 | else |
| 495 | shell%last_exit_status = 1 |
| 496 | end if |
| 497 | else |
| 498 | write(error_unit, '(a,i0)') 'wait: pid ', target_pid, ' is not a child of this shell' |
| 499 | shell%last_exit_status = 1 |
| 500 | end if |
| 501 | end if |
| 502 | end do |
| 503 | end if |
| 504 | |
| 505 | if (shell%last_exit_status /= 1) then |
| 506 | shell%last_exit_status = 0 |
| 507 | end if |
| 508 | end subroutine |
| 509 | |
| 510 | subroutine builtin_trap(cmd, shell) |
| 511 | type(command_t), intent(in) :: cmd |
| 512 | type(shell_state_t), intent(inout) :: shell |
| 513 | |
| 514 | ! Simplified trap implementation - in a full shell this would |
| 515 | ! handle signal trap management |
| 516 | if (cmd%num_tokens < 3) then |
| 517 | write(error_unit, '(a)') 'trap: usage: trap action signal...' |
| 518 | shell%last_exit_status = 1 |
| 519 | return |
| 520 | end if |
| 521 | |
| 522 | ! For now, just acknowledge the trap command |
| 523 | write(output_unit, '(a)') 'trap: signal trapping not yet fully implemented' |
| 524 | shell%last_exit_status = 0 |
| 525 | end subroutine |
| 526 | |
| 527 | subroutine builtin_config(cmd, shell) |
| 528 | type(command_t), intent(in) :: cmd |
| 529 | type(shell_state_t), intent(inout) :: shell |
| 530 | |
| 531 | if (cmd%num_tokens == 1) then |
| 532 | ! Show current config |
| 533 | call show_config() |
| 534 | else |
| 535 | select case(trim(cmd%tokens(2))) |
| 536 | case('show') |
| 537 | call show_config() |
| 538 | case('create') |
| 539 | call create_default_config() |
| 540 | case('reload') |
| 541 | call load_config_file(shell) |
| 542 | case default |
| 543 | write(error_unit, '(a)') 'config: usage: config [show|create|reload]' |
| 544 | shell%last_exit_status = 1 |
| 545 | return |
| 546 | end select |
| 547 | end if |
| 548 | |
| 549 | shell%last_exit_status = 0 |
| 550 | end subroutine |
| 551 | |
| 552 | subroutine builtin_alias(cmd, shell) |
| 553 | type(command_t), intent(in) :: cmd |
| 554 | type(shell_state_t), intent(inout) :: shell |
| 555 | integer :: eq_pos |
| 556 | character(len=256) :: alias_name, alias_command |
| 557 | |
| 558 | if (cmd%num_tokens == 1) then |
| 559 | ! Show all aliases |
| 560 | call show_aliases(shell) |
| 561 | else if (cmd%num_tokens == 2) then |
| 562 | ! Check for alias=command format |
| 563 | eq_pos = index(cmd%tokens(2), '=') |
| 564 | if (eq_pos > 0) then |
| 565 | alias_name = cmd%tokens(2)(:eq_pos-1) |
| 566 | alias_command = cmd%tokens(2)(eq_pos+1:) |
| 567 | |
| 568 | ! Remove quotes if present |
| 569 | if (alias_command(1:1) == '"' .and. alias_command(len_trim(alias_command):len_trim(alias_command)) == '"') then |
| 570 | alias_command = alias_command(2:len_trim(alias_command)-1) |
| 571 | else if (alias_command(1:1) == "'" .and. alias_command(len_trim(alias_command):len_trim(alias_command)) == "'") then |
| 572 | alias_command = alias_command(2:len_trim(alias_command)-1) |
| 573 | end if |
| 574 | |
| 575 | call set_alias(shell, trim(alias_name), trim(alias_command)) |
| 576 | else |
| 577 | ! Show specific alias |
| 578 | alias_name = cmd%tokens(2) |
| 579 | alias_command = get_alias(shell, trim(alias_name)) |
| 580 | if (len(alias_command) > 0) then |
| 581 | write(output_unit, '(a)') 'alias ' // trim(alias_name) // & |
| 582 | '=' // "'" // trim(alias_command) // "'" |
| 583 | else |
| 584 | write(error_unit, '(a)') 'alias: ' // trim(alias_name) // ': not found' |
| 585 | shell%last_exit_status = 1 |
| 586 | return |
| 587 | end if |
| 588 | end if |
| 589 | else |
| 590 | write(error_unit, '(a)') 'alias: usage: alias [name[=value]...]' |
| 591 | shell%last_exit_status = 1 |
| 592 | return |
| 593 | end if |
| 594 | |
| 595 | shell%last_exit_status = 0 |
| 596 | end subroutine |
| 597 | |
| 598 | subroutine builtin_unalias(cmd, shell) |
| 599 | type(command_t), intent(in) :: cmd |
| 600 | type(shell_state_t), intent(inout) :: shell |
| 601 | integer :: i |
| 602 | |
| 603 | if (cmd%num_tokens < 2) then |
| 604 | write(error_unit, '(a)') 'unalias: usage: unalias name...' |
| 605 | shell%last_exit_status = 1 |
| 606 | return |
| 607 | end if |
| 608 | |
| 609 | ! Remove each specified alias |
| 610 | do i = 2, cmd%num_tokens |
| 611 | call unset_alias(shell, trim(cmd%tokens(i))) |
| 612 | end do |
| 613 | |
| 614 | shell%last_exit_status = 0 |
| 615 | end subroutine |
| 616 | |
| 617 | subroutine builtin_help(cmd, shell) |
| 618 | type(command_t), intent(in) :: cmd |
| 619 | type(shell_state_t), intent(inout) :: shell |
| 620 | |
| 621 | write(output_unit, '(a)') 'Fortran Shell (fortsh) - Built-in Commands:' |
| 622 | write(output_unit, '(a)') '========================================' |
| 623 | write(output_unit, '(a)') '' |
| 624 | write(output_unit, '(a)') 'Navigation & Files:' |
| 625 | write(output_unit, '(a)') ' cd [dir] - Change directory (use cd ~ for home)' |
| 626 | write(output_unit, '(a)') ' pwd - Print working directory' |
| 627 | write(output_unit, '(a)') '' |
| 628 | write(output_unit, '(a)') 'Variables & Environment:' |
| 629 | write(output_unit, '(a)') ' export VAR=val - Set environment variable' |
| 630 | write(output_unit, '(a)') ' echo [args] - Display text' |
| 631 | write(output_unit, '(a)') '' |
| 632 | write(output_unit, '(a)') 'Job Control:' |
| 633 | write(output_unit, '(a)') ' jobs - List active jobs' |
| 634 | write(output_unit, '(a)') ' fg [%n] - Bring job to foreground' |
| 635 | write(output_unit, '(a)') ' bg [%n] - Send job to background' |
| 636 | write(output_unit, '(a)') ' kill [-sig] pid - Send signal to process' |
| 637 | write(output_unit, '(a)') ' wait [pid] - Wait for process to complete' |
| 638 | write(output_unit, '(a)') '' |
| 639 | write(output_unit, '(a)') 'Shell Features:' |
| 640 | write(output_unit, '(a)') ' history - Show command history' |
| 641 | write(output_unit, '(a)') ' alias [n=cmd] - Create/show command aliases' |
| 642 | write(output_unit, '(a)') ' unalias name - Remove alias' |
| 643 | write(output_unit, '(a)') ' config [cmd] - Manage shell configuration (.fshrc)' |
| 644 | write(output_unit, '(a)') '' |
| 645 | write(output_unit, '(a)') 'Control Flow:' |
| 646 | write(output_unit, '(a)') ' test / [ ] - Evaluate conditions' |
| 647 | write(output_unit, '(a)') ' if/then/else/fi - Conditional execution' |
| 648 | write(output_unit, '(a)') ' while/do/done - Loop constructs' |
| 649 | write(output_unit, '(a)') '' |
| 650 | write(output_unit, '(a)') 'Other:' |
| 651 | write(output_unit, '(a)') ' source file - Execute script (not yet implemented)' |
| 652 | write(output_unit, '(a)') ' trap - Signal handling (basic support)' |
| 653 | write(output_unit, '(a)') ' rawtest - Test raw terminal input (interactive only)' |
| 654 | write(output_unit, '(a)') ' help - Show this help message' |
| 655 | write(output_unit, '(a)') ' exit [code] - Exit shell' |
| 656 | write(output_unit, '(a)') '' |
| 657 | write(output_unit, '(a)') 'Interactive Editing (available in interactive mode):' |
| 658 | write(output_unit, '(a)') ' ↑/↓ - Navigate command history' |
| 659 | write(output_unit, '(a)') ' ←/→, Ctrl+B/F - Move cursor left/right' |
| 660 | write(output_unit, '(a)') ' Ctrl+A - Move to beginning of line (Home)' |
| 661 | write(output_unit, '(a)') ' Ctrl+E - Move to end of line (End)' |
| 662 | write(output_unit, '(a)') ' Tab - Smart command/file completion' |
| 663 | write(output_unit, '(a)') ' Ctrl+K - Kill text to end of line' |
| 664 | write(output_unit, '(a)') ' Ctrl+U - Kill entire line' |
| 665 | write(output_unit, '(a)') ' Ctrl+W - Kill previous word' |
| 666 | write(output_unit, '(a)') ' Ctrl+Y - Yank (paste) killed text' |
| 667 | write(output_unit, '(a)') ' Ctrl+L - Clear screen' |
| 668 | write(output_unit, '(a)') '' |
| 669 | write(output_unit, '(a)') 'Features: Advanced readline, tab completion, history, aliases, job control' |
| 670 | |
| 671 | shell%last_exit_status = 0 |
| 672 | end subroutine |
| 673 | |
| 674 | subroutine builtin_perf(cmd, shell) |
| 675 | type(command_t), intent(in) :: cmd |
| 676 | type(shell_state_t), intent(inout) :: shell |
| 677 | |
| 678 | if (cmd%num_tokens > 1) then |
| 679 | select case(trim(cmd%tokens(2))) |
| 680 | case('on') |
| 681 | call set_performance_monitoring(.true.) |
| 682 | write(output_unit, '(a)') 'Performance monitoring enabled' |
| 683 | case('off') |
| 684 | call set_performance_monitoring(.false.) |
| 685 | write(output_unit, '(a)') 'Performance monitoring disabled' |
| 686 | case('stats', 'status') |
| 687 | call print_performance_stats() |
| 688 | case('reset') |
| 689 | total_commands = 0 |
| 690 | total_parse_time = 0 |
| 691 | total_exec_time = 0 |
| 692 | total_glob_time = 0 |
| 693 | write(output_unit, '(a)') 'Performance counters reset' |
| 694 | case default |
| 695 | write(error_unit, '(a)') 'perf: Usage: perf [on|off|stats|reset]' |
| 696 | shell%last_exit_status = 1 |
| 697 | return |
| 698 | end select |
| 699 | else |
| 700 | ! Show current status |
| 701 | if (perf_monitoring_enabled) then |
| 702 | write(output_unit, '(a)') 'Performance monitoring: ENABLED' |
| 703 | else |
| 704 | write(output_unit, '(a)') 'Performance monitoring: DISABLED' |
| 705 | end if |
| 706 | write(output_unit, '(a,i0)') 'Commands processed: ', total_commands |
| 707 | write(output_unit, '(a,i0,a)') 'Memory usage: ', get_memory_usage(), ' KB' |
| 708 | end if |
| 709 | |
| 710 | shell%last_exit_status = 0 |
| 711 | end subroutine |
| 712 | |
| 713 | subroutine builtin_memory(cmd, shell) |
| 714 | type(command_t), intent(in) :: cmd |
| 715 | type(shell_state_t), intent(inout) :: shell |
| 716 | |
| 717 | if (cmd%num_tokens > 1) then |
| 718 | select case(trim(cmd%tokens(2))) |
| 719 | case('optimize') |
| 720 | call optimize_memory_pools() |
| 721 | write(output_unit, '(a)') 'Memory pools optimized' |
| 722 | case('stats') |
| 723 | call print_pool_stats() |
| 724 | case('auto') |
| 725 | call auto_optimize_memory() |
| 726 | write(output_unit, '(a)') 'Auto memory optimization triggered' |
| 727 | case default |
| 728 | write(error_unit, '(a)') 'memory: Usage: memory [optimize|stats|auto]' |
| 729 | shell%last_exit_status = 1 |
| 730 | return |
| 731 | end select |
| 732 | else |
| 733 | ! Show memory status |
| 734 | write(output_unit, '(a)') 'Memory Usage Summary:' |
| 735 | write(output_unit, '(a)') '====================' |
| 736 | write(output_unit, '(a,i0)') 'Current allocations: ', current_allocations |
| 737 | write(output_unit, '(a,i0)') 'Peak allocations: ', peak_allocations |
| 738 | write(output_unit, '(a,i0,a)') 'Current memory: ', current_memory_used, ' bytes' |
| 739 | write(output_unit, '(a,i0,a)') 'Peak memory: ', peak_memory_used, ' bytes' |
| 740 | |
| 741 | if (needs_memory_optimization()) then |
| 742 | write(output_unit, '(a)') '' |
| 743 | write(output_unit, '(a)') 'Tip: Memory optimization recommended. Run "memory optimize"' |
| 744 | end if |
| 745 | end if |
| 746 | |
| 747 | shell%last_exit_status = 0 |
| 748 | end subroutine |
| 749 | |
| 750 | subroutine builtin_rawtest(cmd, shell) |
| 751 | type(command_t), intent(in) :: cmd |
| 752 | type(shell_state_t), intent(inout) :: shell |
| 753 | type(termios_t) :: original_termios |
| 754 | character :: ch |
| 755 | logical :: success |
| 756 | integer :: char_code |
| 757 | |
| 758 | write(output_unit, '(a)') 'Raw mode test - press keys to see codes, q to quit:' |
| 759 | write(output_unit, '(a)') 'Entering raw mode...' |
| 760 | |
| 761 | ! Enable raw mode |
| 762 | success = enable_raw_mode(original_termios) |
| 763 | if (.not. success) then |
| 764 | write(error_unit, '(a)') 'rawtest: Failed to enable raw mode' |
| 765 | shell%last_exit_status = 1 |
| 766 | return |
| 767 | end if |
| 768 | |
| 769 | ! Read characters until 'q' is pressed |
| 770 | do |
| 771 | success = read_single_char(ch) |
| 772 | if (.not. success) exit |
| 773 | |
| 774 | char_code = iachar(ch) |
| 775 | |
| 776 | ! Exit on 'q' |
| 777 | if (ch == 'q' .or. ch == 'Q') exit |
| 778 | |
| 779 | ! Handle special characters |
| 780 | if (char_code == 27) then |
| 781 | ! Escape sequence - try to read more |
| 782 | write(output_unit, '(a)', advance='no') 'ESC ' |
| 783 | success = read_single_char(ch) |
| 784 | if (success) then |
| 785 | write(output_unit, '(a,i0)', advance='no') '[', iachar(ch) |
| 786 | if (ch == '[') then |
| 787 | success = read_single_char(ch) |
| 788 | if (success) then |
| 789 | write(output_unit, '(a,i0,a)', advance='no') '[', iachar(ch), '] = ' |
| 790 | select case(ch) |
| 791 | case('A') |
| 792 | write(output_unit, '(a)') 'UP ARROW' |
| 793 | case('B') |
| 794 | write(output_unit, '(a)') 'DOWN ARROW' |
| 795 | case('C') |
| 796 | write(output_unit, '(a)') 'RIGHT ARROW' |
| 797 | case('D') |
| 798 | write(output_unit, '(a)') 'LEFT ARROW' |
| 799 | case default |
| 800 | write(output_unit, '(a)') 'UNKNOWN ESCAPE' |
| 801 | end select |
| 802 | end if |
| 803 | else |
| 804 | write(output_unit, '(a)') '] = ALT+key' |
| 805 | end if |
| 806 | end if |
| 807 | else if (char_code < 32) then |
| 808 | ! Control character |
| 809 | write(output_unit, '(a,i0,a)') 'CTRL+', char_code, ' (^', char(char_code + 64), ')' |
| 810 | else if (char_code == 127) then |
| 811 | write(output_unit, '(a)') 'BACKSPACE/DELETE (127)' |
| 812 | else |
| 813 | ! Regular character |
| 814 | write(output_unit, '(a,a,a,i0,a)') 'Regular: ''', ch, ''' (', char_code, ')' |
| 815 | end if |
| 816 | end do |
| 817 | |
| 818 | ! Restore terminal |
| 819 | success = restore_terminal(original_termios) |
| 820 | if (.not. success) then |
| 821 | write(error_unit, '(a)') 'rawtest: Warning - failed to restore terminal' |
| 822 | end if |
| 823 | |
| 824 | write(output_unit, '(a)') '' |
| 825 | write(output_unit, '(a)') 'Raw mode test completed.' |
| 826 | shell%last_exit_status = 0 |
| 827 | end subroutine |
| 828 | |
| 829 | end module builtins |