jobs.h revision 17987 
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 *	$Id: jobs.h,v 1.2 1994/09/24 02:57:42 davidg Exp $
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
46/*
47 * A job structure contains information about a job.  A job is either a
48 * single process or a set of processes contained in a pipeline.  In the
49 * latter case, pidlist will be non-NULL, and will point to a -1 terminated
50 * array of pids.
51 */
52
53struct procstat {
54	short pid;		/* process id */
55	short status;		/* status flags (defined above) */
56	char *cmd;		/* text of command being run */
57};
58
59
60/* states */
61#define JOBSTOPPED 1		/* all procs are stopped */
62#define JOBDONE 2		/* all procs are completed */
63
64
65struct job {
66	struct procstat ps0;	/* status of process */
67	struct procstat *ps;	/* status or processes when more than one */
68	short nprocs;		/* number of processes */
69	short pgrp;		/* process group of this job */
70	char state;		/* true if job is finished */
71	char used;		/* true if this entry is in used */
72	char changed;		/* true if status has changed */
73#if JOBS
74	char jobctl;		/* job running under job control */
75#endif
76};
77
78extern short backgndpid;	/* pid of last background process */
79extern int job_warning;		/* user was warned about stopped jobs */
80
81void setjobctl __P((int));
82int fgcmd __P((int, char **));
83int bgcmd __P((int, char **));
84int jobscmd __P((int, char **));
85void showjobs __P((int));
86int waitcmd __P((int, char **));
87int jobidcmd __P((int, char **));
88struct job *makejob __P((union node *, int));
89int forkshell __P((struct job *, union node *, int));
90int waitforjob __P((struct job *));
91int stoppedjobs __P((void));
92char *commandtext __P((union node *));
93
94#if ! JOBS
95#define setjobctl(on)	/* do nothing */
96#endif
97