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jobs.h revision 1.7 
      1 /*	$NetBSD: jobs.h,v 1.7 1995/03/21 09:09:19 cgd 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. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the University of
     21  *	California, Berkeley and its contributors.
     22  * 4. Neither the name of the University nor the names of its contributors
     23  *    may be used to endorse or promote products derived from this software
     24  *    without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     36  * SUCH DAMAGE.
     37  *
     38  *	@(#)jobs.h	8.1 (Berkeley) 5/31/93
     39  */
     40 
     41 /* Mode argument to forkshell.  Don't change FORK_FG or FORK_BG. */
     42 #define FORK_FG 0
     43 #define FORK_BG 1
     44 #define FORK_NOJOB 2
     45 
     46 
     47 /*
     48  * A job structure contains information about a job.  A job is either a
     49  * single process or a set of processes contained in a pipeline.  In the
     50  * latter case, pidlist will be non-NULL, and will point to a -1 terminated
     51  * array of pids.
     52  */
     53 
     54 struct procstat {
     55 	short pid;		/* process id */
     56 	short status;		/* status flags (defined above) */
     57 	char *cmd;		/* text of command being run */
     58 };
     59 
     60 
     61 /* states */
     62 #define JOBSTOPPED 1		/* all procs are stopped */
     63 #define JOBDONE 2		/* all procs are completed */
     64 
     65 
     66 struct job {
     67 	struct procstat ps0;	/* status of process */
     68 	struct procstat *ps;	/* status or processes when more than one */
     69 	short nprocs;		/* number of processes */
     70 	short pgrp;		/* process group of this job */
     71 	char state;		/* true if job is finished */
     72 	char used;		/* true if this entry is in used */
     73 	char changed;		/* true if status has changed */
     74 #if JOBS
     75 	char jobctl;		/* job running under job control */
     76 #endif
     77 };
     78 
     79 extern short backgndpid;	/* pid of last background process */
     80 extern int job_warning;		/* user was warned about stopped jobs */
     81 
     82 
     83 #ifdef __STDC__
     84 void setjobctl(int);
     85 void showjobs(int);
     86 struct job *makejob(union node *, int);
     87 int forkshell(struct job *, union node *, int);
     88 int waitforjob(struct job *);
     89 char *commandtext(union node *);
     90 #else
     91 void setjobctl();
     92 void showjobs();
     93 struct job *makejob();
     94 int forkshell();
     95 int waitforjob();
     96 char *commandtext();
     97 #endif
     98 
     99 #if ! JOBS
    100 #define setjobctl(on)	/* do nothing */
    101 #endif
    102