1 /* $NetBSD: jobs.h,v 1.20 2011/06/18 21:18:46 christos 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 62 struct 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 68 struct 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 85 extern pid_t backgndpid; /* pid of last background process */ 86 extern int job_warning; /* user was warned about stopped jobs */ 87 88 void setjobctl(int); 89 void showjobs(struct output *, int); 90 struct job *makejob(union node *, int); 91 int forkshell(struct job *, union node *, int); 92 void forkchild(struct job *, union node *, int, int); 93 int forkparent(struct job *, union node *, int, pid_t); 94 int waitforjob(struct job *); 95 int stoppedjobs(void); 96 void commandtext(struct procstat *, union node *); 97 int getjobpgrp(const char *); 98 99 #if ! JOBS 100 #define setjobctl(on) /* do nothing */ 101 #endif 102