xref: /freebsd/bin/sh/jobs.h (revision 380a989b3223d455375b4fae70fd0b9bdd43bafb)
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 1.9 1998/09/08 13:16:52 cracauer 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 #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 
54 struct 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 
66 struct 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 #endif
77 };
78 
79 extern pid_t backgndpid;	/* pid of last background process */
80 extern int job_warning;		/* user was warned about stopped jobs */
81 extern int in_waitcmd;		/* are we in waitcmd()? */
82 extern int in_dowait;		/* are we in dowait()? */
83 extern volatile sig_atomic_t breakwaitcmd; /* break wait to process traps? */
84 
85 void setjobctl __P((int));
86 int fgcmd __P((int, char **));
87 int bgcmd __P((int, char **));
88 int jobscmd __P((int, char **));
89 void showjobs __P((int));
90 int waitcmd __P((int, char **));
91 int jobidcmd __P((int, char **));
92 struct job *makejob __P((union node *, int));
93 int forkshell __P((struct job *, union node *, int));
94 int waitforjob __P((struct job *));
95 int stoppedjobs __P((void));
96 char *commandtext __P((union node *));
97 
98 #if ! JOBS
99 #define setjobctl(on)	/* do nothing */
100 #endif
101