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- This file is jobs.def, from which is created jobs.c.
- It implements the builtin "jobs" in Bash.
-
- Copyright (C) 1987, 1989, 1991 Free Software Foundation, Inc.
-
- This file is part of GNU Bash, the Bourne Again SHell.
-
- Bash is free software; you can redistribute it and/or modify it under
- the terms of the GNU General Public License as published by the Free
- Software Foundation; either version 1, or (at your option) any later
- version.
-
- Bash is distributed in the hope that it will be useful, but WITHOUT ANY
- WARRANTY; without even the implied warranty of MERCHANTABILITY or
- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- for more details.
-
- You should have received a copy of the GNU General Public License along
- with Bash; see the file COPYING. If not, write to the Free Software
- Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
- $PRODUCES jobs.c
-
- $BUILTIN jobs
- $FUNCTION jobs_builtin
- $DEPENDS_ON JOB_CONTROL
- $SHORT_DOC jobs [-lnp] [jobspec ...] | jobs -x command [args]
- Lists the active jobs. The -l option lists process id's in addition
- to the normal information; the -p option lists process id's only.
- If -n is given, only processes that have changed status since the last
- notification are printed. JOBSPEC restricts output to that job.
- If -x is given, COMMAND is run after all job specifications that appear
- in ARGS have been replaced with the process ID of that job's process group
- leader.
- $END
-
- #include "../shell.h"
-
- #if defined (JOB_CONTROL)
- #include <sys/types.h>
- #include <signal.h>
- #include "../jobs.h"
-
- extern int job_control;
- static int execute_list_with_replacements ();
-
- /* The `jobs' command. Prints outs a list of active jobs. If the
- argument `-l' is given, then the process id's are printed also.
- If the argument `-p' is given, print the process group leader's
- pid only. If `-n' is given, only processes that have changed
- status since the last notification are printed. If -x is given,
- replace all job specs with the pid of the appropriate process
- group leader and execute the command. */
- int
- jobs_builtin (list)
- WORD_LIST *list;
- {
- int form = JLIST_STANDARD;
-
- if (!job_control)
- return (EXECUTION_SUCCESS);
-
- while (list && (*list->word->word == '-'))
- {
- register char *arg = list->word->word;
-
- if (strcmp (arg, "-l") == 0)
- form = JLIST_LONG;
- else if (strcmp (arg, "-p") == 0)
- form = JLIST_PID_ONLY;
- else if (strcmp (arg, "-n") == 0)
- form = JLIST_CHANGED_ONLY;
- else if (strcmp (arg, "-x") == 0)
- {
- if (form != JLIST_STANDARD)
- {
- builtin_error ("Other options not allowed with `-x'");
- return (EXECUTION_FAILURE);
- }
- list = list->next;
- return (execute_list_with_replacements (list));
- }
- else if (strcmp (arg, "--") == 0)
- {
- list = list->next;
- break;
- }
- else
- {
- bad_option (list->word->word);
- return (EXECUTION_FAILURE);
- }
- list = list->next;
- }
-
- if (!list)
- {
- list_jobs (form);
- return (EXECUTION_SUCCESS);
- }
-
- while (list)
- {
- int job;
- sigset_t set, oset;
-
- BLOCK_CHILD (set, oset);
- job = get_job_spec (list);
-
- if ((job == NO_JOB) || !jobs || !jobs[job])
- builtin_error ("No such job %s", list->word->word);
- else if (job != DUP_JOB)
- list_one_job ((JOB *)NULL, form, 0, job);
-
- UNBLOCK_CHILD (oset);
- list = list->next;
- }
- return (EXECUTION_SUCCESS);
- }
-
- static int
- execute_list_with_replacements (list)
- WORD_LIST *list;
- {
- register WORD_LIST *l;
- int job, result;
-
- /* First do the replacement of job specifications with pids. */
- for (l = list; l; l = l->next)
- {
- if (l->word->word[0] == '%') /* we have a winner */
- {
- extern char *itos ();
-
- job = get_job_spec (l);
-
- /* A bad job spec is not really a job spec! Pass it through. */
- if (job < 0 || job >= job_slots || !jobs[job])
- continue;
-
- free (l->word->word);
- l->word->word = itos (jobs[job]->pgrp);
- }
- }
-
- /* Next make a new simple command and execute it. */
- begin_unwind_frame ("jobs_builtin");
- {
- extern COMMAND *make_bare_simple_command ();
- extern WORD_LIST *copy_word_list ();
- extern void dispose_command ();
- COMMAND *command = (COMMAND *)NULL;
-
- add_unwind_protect (dispose_command, command);
-
- command = make_bare_simple_command ();
- command->value.Simple->words = copy_word_list (list);
- command->value.Simple->redirects = (REDIRECT *)NULL;
- command->flags |= CMD_INHIBIT_EXPANSION;
- command->value.Simple->flags |= CMD_INHIBIT_EXPANSION;
-
- result = execute_command (command);
- }
-
- run_unwind_frame ("jobs_builtin");
- return (result);
- }
- #endif /* JOB_CONTROL */
-
-