This file is fg_bg.def, from which is created fg_bg.c.
It implements the builtins "bg" and "fg" in Bash.
-Copyright (C) 1987, 1989, 1991 Free Software Foundation, Inc.
+Copyright (C) 1987-2009 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 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 3 of the License, 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.
+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.
+You should have received a copy of the GNU General Public License
+along with Bash. If not, see <http://www.gnu.org/licenses/>.
$PRODUCES fg_bg.c
$FUNCTION fg_builtin
$DEPENDS_ON JOB_CONTROL
$SHORT_DOC fg [job_spec]
-Place JOB_SPEC in the foreground, and make it the current job. If
-JOB_SPEC is not present, the shell's notion of the current job is
-used.
+Move job to the foreground.
+
+Place the job identified by JOB_SPEC in the foreground, making it the
+current job. If JOB_SPEC is not present, the shell's notion of the
+current job is used.
+
+Exit Status:
+Status of command placed in foreground, or failure if an error occurs.
$END
#include <config.h>
# include <unistd.h>
#endif
+#include "../bashintl.h"
+
#include "../shell.h"
#include "../jobs.h"
#include "common.h"
+#include "bashgetopt.h"
#if defined (JOB_CONTROL)
extern char *this_command_name;
-static int fg_bg ();
+static int fg_bg __P((WORD_LIST *, int));
/* How to bring a job into the foreground. */
int
if (job_control == 0)
{
- builtin_error ("no job control");
+ sh_nojobs ((char *)NULL);
return (EXECUTION_FAILURE);
}
if (no_options (list))
return (EX_USAGE);
+ list = loptend;
/* If the last arg on the line is '&', then start this job in the
background. Else, fg the job. */
$BUILTIN bg
$FUNCTION bg_builtin
$DEPENDS_ON JOB_CONTROL
-$SHORT_DOC bg [job_spec]
-Place JOB_SPEC in the background, as if it had been started with
-`&'. If JOB_SPEC is not present, the shell's notion of the current
-job is used.
+$SHORT_DOC bg [job_spec ...]
+Move jobs to the background.
+
+Place the jobs identified by each JOB_SPEC in the background, as if they
+had been started with `&'. If JOB_SPEC is not present, the shell's notion
+of the current job is used.
+
+Exit Status:
+Returns success unless job control is not enabled or an error occurs.
$END
#if defined (JOB_CONTROL)
bg_builtin (list)
WORD_LIST *list;
{
+ int r;
+
if (job_control == 0)
{
- builtin_error ("no job control");
+ sh_nojobs ((char *)NULL);
return (EXECUTION_FAILURE);
}
if (no_options (list))
return (EX_USAGE);
+ list = loptend;
+
+ /* This relies on the fact that fg_bg() takes a WORD_LIST *, but only acts
+ on the first member (if any) of that list. */
+ r = EXECUTION_SUCCESS;
+ do
+ {
+ if (fg_bg (list, 0) == EXECUTION_FAILURE)
+ r = EXECUTION_FAILURE;
+ if (list)
+ list = list->next;
+ }
+ while (list);
- return (fg_bg (list, 0));
+ return r;
}
/* How to put a job into the foreground/background. */
{
sigset_t set, oset;
int job, status, old_async_pid;
+ JOB *j;
BLOCK_CHILD (set, oset);
job = get_job_spec (list);
- if (job < 0 || job >= job_slots || jobs[job] == 0)
+ if (INVALID_JOB (job))
{
if (job != DUP_JOB)
- builtin_error ("%s: no such job", list ? list->word->word : "current");
+ sh_badjob (list ? list->word->word : _("current"));
goto failure;
}
- /* Or if jobs[job]->pgrp == shell_pgrp. */
+ j = get_job_by_jid (job);
+ /* Or if j->pgrp == shell_pgrp. */
if (IS_JOBCONTROL (job) == 0)
{
- builtin_error ("job %%%d started without job control", job + 1);
+ builtin_error (_("job %d started without job control"), job + 1);
goto failure;
}
if (foreground == 0)
{
old_async_pid = last_asynchronous_pid;
- last_asynchronous_pid = jobs[job]->pgrp; /* As per Posix.2 5.4.2 */
+ last_asynchronous_pid = j->pgrp; /* As per Posix.2 5.4.2 */
}
status = start_job (job, foreground);
{
/* win: */
UNBLOCK_CHILD (oset);
- return (status);
+ return (foreground ? status : EXECUTION_SUCCESS);
}
else
{