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jobs.h

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*                  Copyright (c) 1982-2006 AT&T Corp.                  *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                            by AT&T Corp.                             *
*                                                                      *
*                A copy of the License is available at                 *
*            http://www.opensource.org/licenses/cpl1.0.txt             *
*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T Research                             *
*                           Florham Park NJ                            *
*                                                                      *
*                  David Korn <dgk@research.att.com>                   *
*                                                                      *
***********************************************************************/
#pragma prototyped
#ifndef JOB_NFLAG
/*
 *    Interface to job control for shell
 *    written by David Korn
 *
 */

#define JOBTTY    2

#include    <ast.h>
#include    <sfio.h>
#ifndef SIGINT
#   include <signal.h>
#endif /* !SIGINT */
#include    "FEATURE/options"

#undef JOBS
#if defined(SIGCLD) && !defined(SIGCHLD)
#   define SIGCHLD      SIGCLD
#endif
#ifdef SIGCHLD
#   define JOBS   1
#   include "terminal.h"
#   ifdef FIOLOOKLD
      /* Ninth edition */
      extern int tty_ld, ntty_ld;
#     define OTTYDISC   tty_ld
#     define NTTYDISC   ntty_ld
#   endif   /* FIOLOOKLD */
#else
#   undef SIGTSTP
#   undef SH_MONITOR
#   define SH_MONITOR   0
#   define job_set(x)
#   define job_reset(x)
#endif

struct process
{
      struct process *p_nxtjob;     /* next job structure */
      struct process *p_nxtproc;    /* next process in current job */
      pid_t       p_pid;            /* process id */
      pid_t       p_pgrp;           /* process group */
      pid_t       p_fgrp;           /* process group when stopped */
      short       p_job;            /* job number of process */
      unsigned short    p_exit;           /* exit value or signal number */
      unsigned char     p_flag;           /* flags - see below */
      int         p_env;            /* subshell environment number */
#ifdef JOBS
      off_t       p_name;           /* history file offset for command */
      struct termios    p_stty;           /* terminal state for job */
#endif /* JOBS */
};

struct jobs
{
      struct process    *pwlist;    /* head of process list */
      pid_t       curpgid;    /* current process gid id */
      pid_t       parent;           /* set by fork() */
      pid_t       mypid;            /* process id of shell */
      pid_t       mypgid;           /* process group id of shell */
      pid_t       mytgid;           /* terminal group id of shell */
      unsigned int      in_critical;      /* >0 => in critical region */
      int         numpost;    /* number of posted jobs */
      short       fd;         /* tty descriptor number */
#ifdef JOBS
      int         suspend;    /* suspend character */
      int         linedisc;   /* line dicipline */
#endif /* JOBS */
      char        jobcontrol; /* turned on for real job control */
      char        waitsafe;   /* wait will not block */
      char        waitall;    /* wait for all jobs in pipe */
      char        toclear;    /* job table needs clearing */
      unsigned char     *freejobs;  /* free jobs numbers */
};

/* flags for joblist */
#define JOB_LFLAG 1
#define JOB_NFLAG 2
#define JOB_PFLAG 4
#define JOB_NLFLAG      8

extern struct jobs job;

#ifdef JOBS
extern const char e_jobusage[];
extern const char e_done[];
extern const char e_running[];
extern const char e_coredump[];
extern const char e_no_proc[];
extern const char e_no_job[];
extern const char e_jobsrunning[];
extern const char e_nlspace[];
extern const char e_access[];
extern const char e_terminate[];
extern const char e_no_jctl[];
extern const char e_signo[];
#ifdef SIGTSTP
   extern const char    e_no_start[];
#endif /* SIGTSTP */
#ifdef NTTYDISC
   extern const char    e_newtty[];
   extern const char    e_oldtty[];
#endif /* NTTYDISC */
#endif      /* JOBS */

/*
 * The following are defined in jobs.c
 */

extern void job_clear(void);
extern void job_bwait(char**);
extern int  job_walk(Sfio_t*,int(*)(struct process*,int),int,char*[]);
extern int  job_kill(struct process*,int);
extern void job_wait(pid_t);
extern int  job_post(pid_t,pid_t);
extern void *job_subsave(void);
extern void job_subrestore(void*);
#ifdef JOBS
      extern void job_init(int);
      extern int  job_close(void);
      extern int  job_list(struct process*,int);
      extern int  job_terminate(struct process*,int);
      extern int  job_switch(struct process*,int);
      extern void job_fork(pid_t);
#else
#     define job_init(flag)
#     define job_close()      (0)
#     define job_fork(p)
#endif      /* JOBS */


#endif /* !JOB_NFLAG */

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