| 1 | /*-
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| 2 | * Copyright (c) 1991 The Regents of the University of California.
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * This code is derived from software contributed to Berkeley by
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| 6 | * Kenneth Almquist.
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| 7 | *
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| 8 | * Redistribution and use in source and binary forms, with or without
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| 9 | * modification, are permitted provided that the following conditions
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| 10 | * are met:
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| 11 | * 1. Redistributions of source code must retain the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer.
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| 13 | * 2. Redistributions in binary form must reproduce the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer in the
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| 15 | * documentation and/or other materials provided with the distribution.
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| 16 | * 3. All advertising materials mentioning features or use of this software
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| 17 | * must display the following acknowledgement:
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| 18 | * This product includes software developed by the University of
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| 19 | * California, Berkeley and its contributors.
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| 20 | * 4. Neither the name of the University nor the names of its contributors
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| 21 | * may be used to endorse or promote products derived from this software
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| 22 | * without specific prior written permission.
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| 23 | *
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| 24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 34 | * SUCH DAMAGE.
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| 35 | *
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| 36 | * @(#)jobs.h 5.1 (Berkeley) 3/7/91
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| 37 | */
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| 38 |
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| 39 | /* Mode argument to forkshell. Don't change FORK_FG or FORK_BG. */
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| 40 | #define FORK_FG 0
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| 41 | #define FORK_BG 1
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| 42 | #define FORK_NOJOB 2
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| 43 |
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| 44 |
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| 45 | /*
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| 46 | * A job structure contains information about a job. A job is either a
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| 47 | * single process or a set of processes contained in a pipeline. In the
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| 48 | * latter case, pidlist will be non-NULL, and will point to a -1 terminated
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| 49 | * array of pids.
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| 50 | */
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| 51 |
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| 52 | struct procstat {
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| 53 | pid_t pid; /* process id */
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| 54 | short status; /* status flags (defined above) */
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| 55 | char *cmd; /* text of command being run */
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| 56 | };
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| 57 |
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| 58 |
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| 59 | /* states */
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| 60 | #define JOBSTOPPED 1 /* all procs are stopped */
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| 61 | #define JOBDONE 2 /* all procs are completed */
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| 62 |
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| 63 |
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| 64 | struct job {
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| 65 | struct procstat ps0; /* status of process */
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| 66 | struct procstat *ps; /* status or processes when more than one */
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| 67 | pid_t nprocs; /* number of processes */
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| 68 | pid_t pgrp; /* process group of this job */
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| 69 | char state; /* true if job is finished */
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| 70 | char used; /* true if this entry is in used */
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| 71 | char changed; /* true if status has changed */
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| 72 | #if JOBS
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| 73 | char jobctl; /* job running under job control */
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| 74 | #endif
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| 75 | };
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| 76 |
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| 77 | extern pid_t backgndpid; /* pid of last background process */
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| 78 |
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| 79 |
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| 80 | #ifdef __STDC__
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| 81 | void setjobctl(int);
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| 82 | void showjobs(int);
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| 83 | struct job *makejob(union node *, int);
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| 84 | int forkshell(struct job *, union node *, int);
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| 85 | int waitforjob(struct job *);
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| 86 | #else
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| 87 | void setjobctl();
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| 88 | void showjobs();
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| 89 | struct job *makejob();
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| 90 | int forkshell();
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| 91 | int waitforjob();
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| 92 | #endif
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| 93 |
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| 94 | #if ! JOBS
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| 95 | #define setjobctl(on) /* do nothing */
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| 96 | #endif
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