1 This file is wait.def, from which is created wait.c.
2 It implements the builtin "wait" in Bash.
4 Copyright (C) 1987, 1989, 1991 Free Software Foundation, Inc.
6 This file is part of GNU Bash, the Bourne Again SHell.
8 Bash is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 1, or (at your option) any later
13 Bash is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License along
19 with Bash; see the file COPYING. If not, write to the Free Software
20 Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
23 $FUNCTION wait_builtin
24 $DEPENDS_ON JOB_CONTROL
27 Wait for the specified process and report its termination status. If
28 N is not given, all currently active child processes are waited for,
29 and the return code is zero. N may be a process ID or a job
30 specification; if a job spec is given, all processes in the job's
31 pipeline are waited for.
35 $FUNCTION wait_builtin
36 $DEPENDS_ON !JOB_CONTROL
38 Wait for the specified process and report its termination status. If
39 N is not given, all currently active child processes are waited for,
40 and the return code is zero. N is a process ID; if it is not given,
41 all child processes of the shell are waited for.
46 #include "../bashtypes.h"
49 #if defined (HAVE_UNISTD_H)
53 #include "../bashansi.h"
58 #include "bashgetopt.h"
60 extern int interrupt_immediately;
62 /* Wait for the pid in LIST to stop or die. If no arguments are given, then
63 wait for all of the active background processes of the shell and return
64 0. If a list of pids or job specs are given, return the exit status of
65 the last one waited for. */
67 #define WAIT_RETURN(s) do { run_unwind_frame ("wait_builtin"); return (s); } while (0)
75 if (no_options (list))
80 begin_unwind_frame ("wait_builtin");
81 unwind_protect_int (interrupt_immediately);
82 interrupt_immediately++;
84 /* We support jobs or pids.
85 wait <pid-or-job> [pid-or-job ...] */
87 /* But wait without any arguments means to wait for all of the shell's
88 currently active background processes. */
91 wait_for_background_pids ();
92 WAIT_RETURN (EXECUTION_SUCCESS);
95 status = EXECUTION_SUCCESS;
101 w = list->word->word;
104 if (all_digits (w + 1))
106 pid = (pid_t)atoi (w);
107 status = wait_for_single_pid (pid);
111 builtin_error ("`%s' is not a pid or valid job spec", w);
112 WAIT_RETURN (EXECUTION_FAILURE);
115 #if defined (JOB_CONTROL)
116 else if (job_control && *w)
117 /* Must be a job spec. Check it out. */
122 BLOCK_CHILD (set, oset);
123 job = get_job_spec (list);
125 if (job < 0 || job >= job_slots || !jobs[job])
128 builtin_error ("%s: no such job", list->word->word);
129 UNBLOCK_CHILD (oset);
130 status = 127; /* As per Posix.2, section 4.70.2 */
135 /* Job spec used. Wait for the last pid in the pipeline. */
136 UNBLOCK_CHILD (oset);
137 status = wait_for_job (job);
139 #endif /* JOB_CONTROL */
142 builtin_error ("`%s' is not a pid or valid job spec", w);
143 status = EXECUTION_FAILURE;
148 WAIT_RETURN (status);