jobs.h revision 97659
1/*- 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Kenneth Almquist. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)jobs.h 8.2 (Berkeley) 5/4/95 37 * $FreeBSD: head/bin/sh/jobs.h 97659 2002-05-31 12:31:23Z tjr $ 38 */ 39 40/* Mode argument to forkshell. Don't change FORK_FG or FORK_BG. */ 41#define FORK_FG 0 42#define FORK_BG 1 43#define FORK_NOJOB 2 44 45#include <signal.h> /* for sig_atomic_t */ 46 47/* 48 * A job structure contains information about a job. A job is either a 49 * single process or a set of processes contained in a pipeline. In the 50 * latter case, pidlist will be non-NULL, and will point to a -1 terminated 51 * array of pids. 52 */ 53 54struct procstat { 55 pid_t pid; /* process id */ 56 int status; /* status flags (defined above) */ 57 char *cmd; /* text of command being run */ 58}; 59 60 61/* states */ 62#define JOBSTOPPED 1 /* all procs are stopped */ 63#define JOBDONE 2 /* all procs are completed */ 64 65 66struct job { 67 struct procstat ps0; /* status of process */ 68 struct procstat *ps; /* status or processes when more than one */ 69 short nprocs; /* number of processes */ 70 short pgrp; /* process group of this job */ 71 char state; /* true if job is finished */ 72 char used; /* true if this entry is in used */ 73 char changed; /* true if status has changed */ 74#if JOBS 75 char jobctl; /* job running under job control */ 76 struct job *next; /* job used after this one */ 77#endif 78}; 79 80extern pid_t backgndpid; /* pid of last background process */ 81extern int job_warning; /* user was warned about stopped jobs */ 82extern int in_waitcmd; /* are we in waitcmd()? */ 83extern int in_dowait; /* are we in dowait()? */ 84extern volatile sig_atomic_t breakwaitcmd; /* break wait to process traps? */ 85 86void setjobctl(int); 87int fgcmd(int, char **); 88int bgcmd(int, char **); 89int jobscmd(int, char **); 90void showjobs(int); 91int waitcmd(int, char **); 92int jobidcmd(int, char **); 93struct job *makejob(union node *, int); 94int forkshell(struct job *, union node *, int); 95int waitforjob(struct job *, int *); 96int stoppedjobs(void); 97char *commandtext(union node *); 98 99#if ! JOBS 100#define setjobctl(on) /* do nothing */ 101#endif 102