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/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1982-2010 AT&T Intellectual Property *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* 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 short p_exitmin; /* minimum exit value for xargs */
unsigned short 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 savesig; /* active signal */
int numpost; /* number of posted jobs */
#ifdef SHOPT_BGX
int numbjob; /* number of background jobs */
#endif /* SHOPT_BGX */
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
#if !_std_malloc
#include <vmalloc.h>
#if VMALLOC_VERSION >= 20070911L
#define vmbusy() (vmstat(0,0)!=0)
#endif
#endif
#ifndef vmbusy
#define vmbusy() 0
#endif
#define job_lock() (job.in_critical++)
#define job_unlock() \
do { \
int sig; \
if (!--job.in_critical && (sig = job.savesig)) \
{ \
if (!job.in_critical++ && !vmbusy()) \
job_reap(sig); \
job.in_critical--; \
} \
} while(0)
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 int job_wait(pid_t);
extern int job_post(pid_t,pid_t);
extern void *job_subsave(void);
extern void job_subrestore(void*);
#ifdef SHOPT_BGX
extern void job_chldtrap(Shell_t*, const char*,int);
#endif /* SHOPT_BGX */
#ifdef JOBS
extern void job_init(Shell_t*,int);
extern int job_close(Shell_t*);
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);
extern int job_reap(int);
#else
# define job_init(s,flag)
# define job_close(s) (0)
# define job_fork(p)
#endif /* JOBS */
#endif /* !JOB_NFLAG */
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