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 8.1 (Berkeley) 5/31/93 37 */ 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 45 /* 46 * A job structure contains information about a job. A job is either a 47 * single process or a set of processes contained in a pipeline. In the 48 * latter case, pidlist will be non-NULL, and will point to a -1 terminated 49 * array of pids. 50 */ 51 52 struct procstat { 53 short pid; /* process id */ 54 short status; /* status flags (defined above) */ 55 char *cmd; /* text of command being run */ 56 }; 57 58 59 /* states */ 60 #define JOBSTOPPED 1 /* all procs are stopped */ 61 #define JOBDONE 2 /* all procs are completed */ 62 63 64 struct job { 65 struct procstat ps0; /* status of process */ 66 struct procstat *ps; /* status or processes when more than one */ 67 short nprocs; /* number of processes */ 68 short pgrp; /* process group of this job */ 69 char state; /* true if job is finished */ 70 char used; /* true if this entry is in used */ 71 char changed; /* true if status has changed */ 72 #if JOBS 73 char jobctl; /* job running under job control */ 74 #endif 75 }; 76 77 extern short backgndpid; /* pid of last background process */ 78 extern int job_warning; /* user was warned about stopped jobs */ 79 80 81 #ifdef __STDC__ 82 void setjobctl(int); 83 void showjobs(int); 84 struct job *makejob(union node *, int); 85 int forkshell(struct job *, union node *, int); 86 int waitforjob(struct job *); 87 char *commandtext(union node *); 88 #else 89 void setjobctl(); 90 void showjobs(); 91 struct job *makejob(); 92 int forkshell(); 93 int waitforjob(); 94 char *commandtext(); 95 #endif 96 97 #if ! JOBS 98 #define setjobctl(on) /* do nothing */ 99 #endif 100