/*      $OpenBSD: proc.h,v 1.5 2020/08/30 22:23:47 mortimer Exp $       */
/*      $NetBSD: proc.h,v 1.7 1995/04/29 23:21:35 mycroft Exp $ */

/*-
 * Copyright (c) 1980, 1991, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * 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. 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.
 *
 *      @(#)proc.h      8.1 (Berkeley) 5/31/93
 */

/*
 * Structure for each process the shell knows about:
 *      allocated and filled by pcreate.
 *      flushed by pflush; freeing always happens at top level
 *          so the interrupt level has less to worry about.
 *      processes are related to "friends" when in a pipeline;
 *          p_friends links makes a circular list of such jobs
 */
struct process {
    struct process *p_next;     /* next in global "proclist" */
    struct process *p_friends;  /* next in job list (or self) */
    struct directory *p_cwd;    /* cwd of the job (only in head) */
    short unsigned p_flags;     /* various job status flags */
    char    p_reason;           /* reason for entering this state */
    int     p_index;            /* shorthand job index */
    pid_t   p_pid;
    pid_t   p_jobid;            /* pid of job leader */
    /* if a job is stopped/background p_jobid gives its pgrp */
    struct timespec p_btime;    /* begin time */
    struct timespec p_etime;    /* end time */
    struct rusage p_rusage;
    Char   *p_command;          /* first PMAXLEN chars of command */
};

/* flag values for p_flags */
#define PRUNNING        (1<<0)  /* running */
#define PSTOPPED        (1<<1)  /* stopped */
#define PNEXITED        (1<<2)  /* normally exited */
#define PAEXITED        (1<<3)  /* abnormally exited */
#define PSIGNALED       (1<<4)  /* terminated by a signal != SIGINT */

#define PALLSTATES      (PRUNNING|PSTOPPED|PNEXITED|PAEXITED|PSIGNALED|PINTERRUPTED)
#define PNOTIFY         (1<<5)  /* notify async when done */
#define PTIME           (1<<6)  /* job times should be printed */
#define PAWAITED        (1<<7)  /* top level is waiting for it */
#define PFOREGND        (1<<8)  /* started in shells pgrp */
#define PDUMPED         (1<<9)  /* process dumped core */
#define PERR            (1<<10) /* diagnostic output also piped out */
#define PPOU            (1<<11) /* piped output */
#define PREPORTED       (1<<12) /* status has been reported */
#define PINTERRUPTED    (1<<13) /* job stopped via interrupt signal */
#define PPTIME          (1<<14) /* time individual process */
#define PNEEDNOTE       (1<<15) /* notify as soon as practical */

#define PMAXLEN         80

/* defines for arguments to pprint */
#define NUMBER          01
#define NAME            02
#define REASON          04
#define AMPERSAND       010
#define FANCY           020
#define SHELLDIR        040     /* print shell's dir if not the same */
#define JOBDIR          0100    /* print job's dir if not the same */
#define AREASON         0200

extern struct process proclist;   /* list head of all processes */
extern bool    pnoprocesses;      /* pchild found nothing to wait for */

extern struct process *pholdjob;  /* one level stack of current jobs */

extern struct process *pcurrjob;  /* current job */
extern struct process *pcurrent;  /* current job in table */
extern struct process *pprevious; /* previous job in table */

extern int    pmaxindex;          /* current maximum job index */