jobs.h revision dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0 
1/*	$NetBSD: jobs.h,v 1.19 2003/11/27 21:16:14 dsl Exp $	*/
2
3/*-
4 * Copyright (c) 1991, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Kenneth Almquist.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 *	@(#)jobs.h	8.2 (Berkeley) 5/4/95
35 */
36
37#include "output.h"
38
39/* Mode argument to forkshell.  Don't change FORK_FG or FORK_BG. */
40#define FORK_FG 0
41#define FORK_BG 1
42#define FORK_NOJOB 2
43
44/* mode flags for showjob(s) */
45#define	SHOW_PGID	0x01	/* only show pgid - for jobs -p */
46#define	SHOW_MULTILINE	0x02	/* one line per process */
47#define	SHOW_PID	0x04	/* include process pid */
48#define	SHOW_CHANGED	0x08	/* only jobs whose state has changed */
49#define	SHOW_SIGNALLED	0x10	/* only if stopped/exited on signal */
50#define	SHOW_ISSIG	0x20	/* job was signalled */
51#define	SHOW_NO_FREE	0x40	/* do not free job */
52
53
54/*
55 * A job structure contains information about a job.  A job is either a
56 * single process or a set of processes contained in a pipeline.  In the
57 * latter case, pidlist will be non-NULL, and will point to a -1 terminated
58 * array of pids.
59 */
60#define	MAXCMDTEXT	200
61
62struct procstat {
63	pid_t	pid;		/* process id */
64 	int	status;		/* last process status from wait() */
65 	char	cmd[MAXCMDTEXT];/* text of command being run */
66};
67
68struct job {
69	struct procstat ps0;	/* status of process */
70	struct procstat *ps;	/* status or processes when more than one */
71	int	nprocs;		/* number of processes */
72	pid_t	pgrp;		/* process group of this job */
73	char	state;
74#define	JOBRUNNING	0	/* at least one proc running */
75#define	JOBSTOPPED	1	/* all procs are stopped */
76#define	JOBDONE		2	/* all procs are completed */
77	char	used;		/* true if this entry is in used */
78	char	changed;	/* true if status has changed */
79#if JOBS
80	char 	jobctl;		/* job running under job control */
81	int	prev_job;	/* previous job index */
82#endif
83};
84
85extern pid_t backgndpid;	/* pid of last background process */
86extern int job_warning;		/* user was warned about stopped jobs */
87
88void setjobctl(int);
89int fgcmd(int, char **);
90int bgcmd(int, char **);
91int jobscmd(int, char **);
92void showjobs(struct output *, int);
93int waitcmd(int, char **);
94int jobidcmd(int, char **);
95struct job *makejob(union node *, int);
96int forkshell(struct job *, union node *, int);
97void forkchild(struct job *, union node *, int, int);
98int forkparent(struct job *, union node *, int, pid_t);
99int waitforjob(struct job *);
100int stoppedjobs(void);
101void commandtext(struct procstat *, union node *);
102int getjobpgrp(const char *);
103
104#if ! JOBS
105#define setjobctl(on)	/* do nothing */
106#endif
107