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freebsd-skq/bin/sh/jobs.h

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BSD 4.4 Lite bin Sources
1994-05-26 06:18:55 +00:00
/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Kenneth Almquist.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
Renumber copyright clause 4 Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96
2017-02-28 23:42:47 +00:00
* 3. Neither the name of the University nor the names of its contributors
BSD 4.4 Lite bin Sources
1994-05-26 06:18:55 +00:00
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
Merge of 4.4-Lite2 sh source, plus some gcc -Wall cleaning. This is a merge of parallel duplicate work by Steve Price and myself. :-] There are some changes to the build that are my fault... mkinit.c was trying (poorly) to duplicate some of the work that make(1) is designed to do. The Makefile hackery is my fault too, the depend list was incomplete because of some explicit OBJS+= entries, so mkdep wasn't picking up their source file #includes. This closes a pile of /bin/sh PR's, but not all of them.. Submitted by: Steve Price <steve@bonsai.hiwaay.net>, peter
1996-09-01 10:22:36 +00:00
* @(#)jobs.h 8.2 (Berkeley) 5/4/95
$Id$ -> $FreeBSD$
1999-08-27 23:15:48 +00:00
* $FreeBSD$
BSD 4.4 Lite bin Sources
1994-05-26 06:18:55 +00:00
*/
/* Mode argument to forkshell. Don't change FORK_FG or FORK_BG. */
#define FORK_FG 0
#define FORK_BG 1
#define FORK_NOJOB 2
Improve bookkeeping of in_waitcmd and style fixes. Submitted by: Bruce Evans
1998-08-25 09:33:34 +00:00
#include <signal.h> /* for sig_atomic_t */
BSD 4.4 Lite bin Sources
1994-05-26 06:18:55 +00:00
sh: Move various structs from jobs.h to jobs.c These implementation details of jobs.c need not be exposed.
2018-01-01 22:31:52 +00:00
struct job;
BSD 4.4 Lite bin Sources
1994-05-26 06:18:55 +00:00
Add the POSIX option -p to the jobs builtin command. It prints the PID of the process leader for each job. Now the last specified option for the output format (-l, -p or -s) wins, previously -s trumped -l. PR: 99926 Submitted by: Ed Schouten and novel (patches modified by me)
2006-10-07 16:51:16 +00:00
enum {
SHOWJOBS_DEFAULT, /* job number, status, command */
SHOWJOBS_VERBOSE, /* job number, PID, status, command */
SHOWJOBS_PIDS, /* PID only */
SHOWJOBS_PGIDS /* PID of the group leader only */
};
BSD 4.4 Lite bin Sources
1994-05-26 06:18:55 +00:00
extern int job_warning; /* user was warned about stopped jobs */
o __P has been reoved o Old-style K&R declarations have been converted to new C89 style o register has been removed o prototype for main() has been removed (gcc3 makes it an error) o int main(int argc, char *argv[]) is the preferred main definition. o Attempt to not break style(9) conformance for declarations more than they already are. o Change int foo() { ... to int foo(void) { ...
2002-02-02 06:50:57 +00:00
void setjobctl(int);
Add the POSIX option -p to the jobs builtin command. It prints the PID of the process leader for each job. Now the last specified option for the output format (-l, -p or -s) wins, previously -s trumped -l. PR: 99926 Submitted by: Ed Schouten and novel (patches modified by me)
2006-10-07 16:51:16 +00:00
void showjobs(int, int);
o __P has been reoved o Old-style K&R declarations have been converted to new C89 style o register has been removed o prototype for main() has been removed (gcc3 makes it an error) o int main(int argc, char *argv[]) is the preferred main definition. o Attempt to not break style(9) conformance for declarations more than they already are. o Change int foo() { ... to int foo(void) { ...
2002-02-02 06:50:57 +00:00
struct job *makejob(union node *, int);
Avoid using ints or shorts to store process id's, use pid_t instead. The pgrp member of struct job was declared as a short and could not store every possible process group ID value, the rest of them were benign because pid_t happens to be an int.
2002-07-18 10:22:42 +00:00
pid_t forkshell(struct job *, union node *, int);
sh: Use vfork in a few common cases. This uses vfork() for simple commands and command substitutions containing a single simple command, invoking an external program under certain conditions (no redirections or variable assignments, non-interactive shell, no job control). These restrictions limit the amount of code executed in a vforked child. There is a large speedup (for example 35%) in microbenchmarks. The difference in buildkernel is smaller (for example 0.5%) but still statistically significant. See http://lists.freebsd.org/pipermail/freebsd-hackers/2012-January/037581.html for some numbers. The use of vfork() can be disabled by setting a variable named SH_DISABLE_VFORK.
2012-02-04 23:12:14 +00:00
pid_t vforkexecshell(struct job *, char **, char **, const char *, int, int []);
o __P has been reoved o Old-style K&R declarations have been converted to new C89 style o register has been removed o prototype for main() has been removed (gcc3 makes it an error) o int main(int argc, char *argv[]) is the preferred main definition. o Attempt to not break style(9) conformance for declarations more than they already are. o Change int foo() { ... to int foo(void) { ...
2002-02-02 06:50:57 +00:00
int waitforjob(struct job *, int *);
int stoppedjobs(void);
sh: Forget about terminated background processes sooner. Unless $! has been referenced for a particular job or $! still contains that job's pid, forget about it after it has terminated. If $! has been referenced, remember the job until the wait builtin has reported its completion (either with the pid as parameter or without parameters). In interactive mode, jobs are forgotten after termination has been reported, which happens before primary prompts and through the jobs builtin. Even then, though, remember a job if $! has been referenced. This is similar to what is suggested by POSIX and should fix most memory leaks (which also tend to cause sh to use more CPU time) with long running scripts that start background jobs. Caveats: * Repeatedly referencing $! without ever doing 'wait', like while :; do foo & echo started foo: $!; sleep 60; done will still use a lot of memory and CPU time in the long run. * The jobs and jobid builtins do not cause a job to be remembered for longer like expanding $! does. PR: bin/55346
2010-06-29 22:37:45 +00:00
int backgndpidset(void);
pid_t backgndpidval(void);
o __P has been reoved o Old-style K&R declarations have been converted to new C89 style o register has been removed o prototype for main() has been removed (gcc3 makes it an error) o int main(int argc, char *argv[]) is the preferred main definition. o Attempt to not break style(9) conformance for declarations more than they already are. o Change int foo() { ... to int foo(void) { ...
2002-02-02 06:50:57 +00:00
char *commandtext(union node *);
BSD 4.4 Lite bin Sources
1994-05-26 06:18:55 +00:00
#if ! JOBS
#define setjobctl(on) /* do nothing */
#endif
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