commands/ash/jobs.h

   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  * 4. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  *      @(#)jobs.h      8.2 (Berkeley) 5/4/95
  33  * $FreeBSD: src/bin/sh/jobs.h,v 1.18 2004/04/06 20:06:51 markm Exp $
  34  */
  35
  36 /* Mode argument to forkshell.  Don't change FORK_FG or FORK_BG. */
  37 #define FORK_FG 0
  38 #define FORK_BG 1
  39 #define FORK_NOJOB 2
  40
  41 #include <signal.h>             /* for sig_atomic_t */
  42
  43 /*
  44  * A job structure contains information about a job.  A job is either a
  45  * single process or a set of processes contained in a pipeline.  In the
  46  * latter case, pidlist will be non-NULL, and will point to a -1 terminated
  47  * array of pids.
  48  */
  49
  50 struct procstat {
  51         pid_t pid;              /* process id */
  52         int status;             /* status flags (defined above) */
  53         char *cmd;              /* text of command being run */
  54 };
  55
  56
  57 /* states */
  58 #define JOBSTOPPED 1            /* all procs are stopped */
  59 #define JOBDONE 2               /* all procs are completed */
  60
  61
  62 struct job {
  63         struct procstat ps0;    /* status of process */
  64         struct procstat *ps;    /* status or processes when more than one */
  65         short nprocs;           /* number of processes */
  66         pid_t pgrp;             /* process group of this job */
  67         char state;             /* true if job is finished */
  68         char used;              /* true if this entry is in used */
  69         char changed;           /* true if status has changed */
  70         char foreground;        /* true if running in the foreground */
  71 #if JOBS
  72         char jobctl;            /* job running under job control */
  73         struct job *next;       /* job used after this one */
  74 #endif
  75 };
  76
  77 extern pid_t backgndpid;        /* pid of last background process */
  78 extern int job_warning;         /* user was warned about stopped jobs */
  79 extern int in_waitcmd;          /* are we in waitcmd()? */
  80 extern int in_dowait;           /* are we in dowait()? */
  81 extern volatile sig_atomic_t breakwaitcmd; /* break wait to process traps? */
  82
  83 void setjobctl(int);
  84 int fgcmd(int, char **);
  85 int bgcmd(int, char **);
  86 int jobscmd(int, char **);
  87 void showjobs(int, int, int);
  88 int waitcmd(int, char **);
  89 int jobidcmd(int, char **);
  90 struct job *makejob(union node *, int);
  91 pid_t forkshell(struct job *, union node *, int);
  92 int waitforjob(struct job *, int *);
  93 int stoppedjobs(void);
  94 char *commandtext(union node *);
  95
  96 #if ! JOBS
  97 #define setjobctl(on)   /* do nothing */
  98 #endif
  99
 100 /*
 101  * $PchId: jobs.h,v 1.4 2006/03/30 12:07:24 philip Exp $
 102  */