4783843fdc
the non-vfork case. Having said that, it would be nice if pipelines of simple commands were vforked too. Right now they are not. Explain that setpgid() might fail because we are doing it both in the parent and the child case, because we don't know which one will come first. Suspending a pipeline prints %1 Suspended n times where n is the number of processes, but that was there before. It is easy to fix, but I'll leave the code alone for now.
100 lines
3.7 KiB
C
100 lines
3.7 KiB
C
/* $NetBSD: jobs.h,v 1.15 2002/09/28 01:25:02 christos Exp $ */
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/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Kenneth Almquist.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)jobs.h 8.2 (Berkeley) 5/4/95
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*/
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/* Mode argument to forkshell. Don't change FORK_FG or FORK_BG. */
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#define FORK_FG 0
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#define FORK_BG 1
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#define FORK_NOJOB 2
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/*
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* A job structure contains information about a job. A job is either a
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* single process or a set of processes contained in a pipeline. In the
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* latter case, pidlist will be non-NULL, and will point to a -1 terminated
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* array of pids.
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*/
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struct procstat {
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pid_t pid; /* process id */
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int status; /* status flags (defined above) */
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char *cmd; /* text of command being run */
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};
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/* states */
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#define JOBSTOPPED 1 /* all procs are stopped */
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#define JOBDONE 2 /* all procs are completed */
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struct job {
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struct procstat ps0; /* status of process */
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struct procstat *ps; /* status or processes when more than one */
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short nprocs; /* number of processes */
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short pgrp; /* process group of this job */
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char state; /* true if job is finished */
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char used; /* true if this entry is in used */
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char changed; /* true if status has changed */
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#if JOBS
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char jobctl; /* job running under job control */
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#endif
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};
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extern short backgndpid; /* pid of last background process */
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extern int job_warning; /* user was warned about stopped jobs */
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void setjobctl __P((int));
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int fgcmd __P((int, char **));
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int bgcmd __P((int, char **));
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int jobscmd __P((int, char **));
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void showjobs __P((int));
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int waitcmd __P((int, char **));
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int jobidcmd __P((int, char **));
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struct job *makejob __P((union node *, int));
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int forkshell __P((struct job *, union node *, int));
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void forkchild __P((struct job *, union node *, int, int));
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int forkparent __P((struct job *, union node *, int, pid_t));
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int waitforjob __P((struct job *));
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int stoppedjobs __P((void));
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char *commandtext __P((union node *));
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#if ! JOBS
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#define setjobctl(on) /* do nothing */
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#endif
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