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jobs.h

/*    $NetBSD: jobs.h,v 1.17 2003/01/22 20:36:04 dsl Exp $  */

/*-
 * Copyright (c) 1991, 1993
 *    The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Kenneth Almquist.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    This product includes software developed by the University of
 *    California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *    @(#)jobs.h  8.2 (Berkeley) 5/4/95
 */

#include <stdint.h>
#include <sys/types.h>

/* Mode argument to forkshell.  Don't change FORK_FG or FORK_BG. */
#define FORK_FG 0
#define FORK_BG 1
#define FORK_NOJOB 2

/* mode flags for showjob(s) */
#define     SHOW_PGID   0x01  /* only show pgid - for jobs -p */
#define     SHOW_PID    0x04  /* include process pid */
#define     SHOW_CHANGED      0x08  /* only jobs whose state has changed */


/*
 * A job structure contains information about a job.  A job is either a
 * single process or a set of processes contained in a pipeline.  In the
 * latter case, pidlist will be non-NULL, and will point to a -1 terminated
 * array of pids.
 */

struct procstat {
      pid_t pid;        /* process id */
      int   status;           /* last process status from wait() */
      char  *cmd;       /* text of command being run */
};

struct job {
      struct procstat ps0;    /* status of process */
      struct procstat *ps;    /* status or processes when more than one */
#if JOBS
      int stopstatus;         /* status of a stopped job */
#endif
      uint32_t
            nprocs: 16, /* number of processes */
            state: 8,
#define     JOBRUNNING  0     /* at least one proc running */
#define     JOBSTOPPED  1     /* all procs are stopped */
#define     JOBDONE           2     /* all procs are completed */
#if JOBS
            sigint: 1,  /* job was killed by SIGINT */
            jobctl: 1,  /* job running under job control */
#endif
            waited: 1,  /* true if this entry has been waited for */
            used: 1,    /* true if this entry is in used */
            changed: 1; /* true if status has changed */
      struct job *prev_job;   /* previous job */
};

extern pid_t backgndpid;      /* pid of last background process */
extern int job_warning;       /* user was warned about stopped jobs */
#if JOBS
extern int jobctl;            /* true if doing job control */
#endif

void setjobctl(int);
int killcmd(int, char **);
int fgcmd(int, char **);
int bgcmd(int, char **);
int jobscmd(int, char **);
struct output;
void showjobs(struct output *, int);
int waitcmd(int, char **);
struct job *makejob(union node *, int);
int forkshell(struct job *, union node *, int);
int waitforjob(struct job *);
int stoppedjobs(void);

#if ! JOBS
#define setjobctl(on)   /* do nothing */
#endif

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