bin/sh/jobs.h

   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