Imported from ../bash-1.14.7.tar.gz.
This commit is contained in:
Jari Aalto
commit
726f63884d
402 changed files with 150297 additions and 0 deletions
345
jobs.h
Normal file
345
jobs.h
Normal file
|
|
@ -0,0 +1,345 @@
|
|||
/* jobs.h -- structures and stuff used by the jobs.c file. */
|
||||
|
||||
/* Copyright (C) 1993 Free Software Foundation, Inc.
|
||||
|
||||
This file is part of GNU Bash, the Bourne Again SHell.
|
||||
|
||||
Bash is free software; you can redistribute it and/or modify it under
|
||||
the terms of the GNU General Public License as published by the Free
|
||||
Software Foundation; either version 2, or (at your option) any later
|
||||
version.
|
||||
|
||||
Bash is distributed in the hope that it will be useful, but WITHOUT ANY
|
||||
WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||||
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||||
for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License along
|
||||
with Bash; see the file COPYING. If not, write to the Free Software
|
||||
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
|
||||
|
||||
#if !defined (__JOBS_H__)
|
||||
# define __JOBS_H__
|
||||
|
||||
#include "quit.h"
|
||||
#include "siglist.h"
|
||||
|
||||
#include "stdc.h"
|
||||
|
||||
/* Defines controlling the fashion in which jobs are listed. */
|
||||
#define JLIST_STANDARD 0
|
||||
#define JLIST_LONG 1
|
||||
#define JLIST_PID_ONLY 2
|
||||
#define JLIST_CHANGED_ONLY 3
|
||||
|
||||
#if defined (HAVE_WAIT_H)
|
||||
# include <sys/wait.h>
|
||||
#else /* !HAVE_WAIT_H */
|
||||
|
||||
# include "bash_endian.h"
|
||||
|
||||
# if !defined (_POSIX_VERSION)
|
||||
# if defined (LITTLE_ENDIAN)
|
||||
union wait
|
||||
{
|
||||
int w_status; /* used in syscall */
|
||||
|
||||
/* Terminated process status. */
|
||||
struct
|
||||
{
|
||||
unsigned short
|
||||
w_Termsig : 7, /* termination signal */
|
||||
w_Coredump : 1, /* core dump indicator */
|
||||
w_Retcode : 8, /* exit code if w_termsig==0 */
|
||||
w_Fill1 : 16; /* high 16 bits unused */
|
||||
} w_T;
|
||||
|
||||
/* Stopped process status. Returned
|
||||
only for traced children unless requested
|
||||
with the WUNTRACED option bit. */
|
||||
struct
|
||||
{
|
||||
unsigned short
|
||||
w_Stopval : 8, /* == W_STOPPED if stopped */
|
||||
w_Stopsig : 8, /* actually zero on XENIX */
|
||||
w_Fill2 : 16; /* high 16 bits unused */
|
||||
} w_S;
|
||||
};
|
||||
|
||||
# else /* !LITTLE_ENDIAN */
|
||||
|
||||
/* This is for big-endian machines like the IBM RT, HP 9000, or Sun-3 */
|
||||
|
||||
union wait
|
||||
{
|
||||
int w_status; /* used in syscall */
|
||||
|
||||
/* Terminated process status. */
|
||||
struct
|
||||
{
|
||||
unsigned short w_Fill1 : 16; /* high 16 bits unused */
|
||||
unsigned w_Retcode : 8; /* exit code if w_termsig==0 */
|
||||
unsigned w_Coredump : 1; /* core dump indicator */
|
||||
unsigned w_Termsig : 7; /* termination signal */
|
||||
} w_T;
|
||||
|
||||
/* Stopped process status. Returned
|
||||
only for traced children unless requested
|
||||
with the WUNTRACED option bit. */
|
||||
struct
|
||||
{
|
||||
unsigned short w_Fill2 : 16; /* high 16 bits unused */
|
||||
unsigned w_Stopsig : 8; /* signal that stopped us */
|
||||
unsigned w_Stopval : 8; /* == W_STOPPED if stopped */
|
||||
} w_S;
|
||||
};
|
||||
|
||||
# endif /* !LITTLE_ENDIAN */
|
||||
|
||||
# define w_termsig w_T.w_Termsig
|
||||
# define w_coredump w_T.w_Coredump
|
||||
# define w_retcode w_T.w_Retcode
|
||||
# define w_stopval w_S.w_Stopval
|
||||
# define w_stopsig w_S.w_Stopsig
|
||||
|
||||
/* Note that sys/wait.h defines these for Posix systems. */
|
||||
# define WSTOPPED 0177
|
||||
# define WIFSTOPPED(x) (((x) . w_stopval) == WSTOPPED)
|
||||
# define WIFEXITED(x) ((! (WIFSTOPPED (x))) && (((x) . w_termsig) == 0))
|
||||
# define WIFSIGNALED(x) ((! (WIFSTOPPED (x))) && (((x) . w_termsig) != 0))
|
||||
# endif /* !_POSIX_VERSION */
|
||||
#endif /* !HAVE_WAIT_H */
|
||||
|
||||
/* How to get the status of a job. For Posix, this is just an
|
||||
int, but for other systems we have to crack the union wait. */
|
||||
#if !defined (_POSIX_VERSION)
|
||||
# define pid_t int
|
||||
typedef union wait WAIT;
|
||||
# define WSTATUS(t) (t.w_status)
|
||||
#else /* _POSIX_VERSION */
|
||||
typedef int WAIT;
|
||||
# define WSTATUS(t) (t)
|
||||
#endif /* _POSIX_VERSION */
|
||||
|
||||
/* Make sure that parameters to wait3 are defined. */
|
||||
#if !defined (WNOHANG)
|
||||
# define WNOHANG 1
|
||||
# define WUNTRACED 2
|
||||
#endif /* WNOHANG */
|
||||
|
||||
/* More Posix P1003.1 definitions. In the POSIX versions, the parameter is
|
||||
passed as an `int', in the non-POSIX version, as `union wait'. */
|
||||
#if defined (_POSIX_VERSION)
|
||||
|
||||
# if !defined (WSTOPSIG)
|
||||
# define WSTOPSIG(s) ((s) >> 8)
|
||||
# endif /* !WSTOPSIG */
|
||||
|
||||
# if !defined (WTERMSIG)
|
||||
# define WTERMSIG(s) ((s) & 0177)
|
||||
# endif /* !WTERMSIG */
|
||||
|
||||
# if !defined (WEXITSTATUS)
|
||||
# define WEXITSTATUS(s) ((s) >> 8)
|
||||
# endif /* !WEXITSTATUS */
|
||||
|
||||
# if !defined (WIFSTOPPED)
|
||||
# define WIFSTOPPED(s) (((s) & 0177) == 0177)
|
||||
# endif /* !WIFSTOPPED */
|
||||
|
||||
# if !defined (WIFEXITED)
|
||||
# define WIFEXITED(s) (((s) & 0377) == 0)
|
||||
# endif /* !WIFEXITED */
|
||||
|
||||
# if !defined (WIFSIGNALED)
|
||||
# define WIFSIGNALED(s) (!WIFSTOPPED(s) && !WIFEXITED(s))
|
||||
# endif /* !WIFSIGNALED */
|
||||
|
||||
# if !defined (WIFCORED)
|
||||
# define WIFCORED(s) ((s) & 0200)
|
||||
# endif /* !WIFCORED */
|
||||
|
||||
#else /* !_POSIX_VERSION */
|
||||
|
||||
# if !defined (WSTOPSIG)
|
||||
# define WSTOPSIG(s) ((s).w_stopsig)
|
||||
# endif /* !WSTOPSIG */
|
||||
|
||||
# if !defined (WTERMSIG)
|
||||
# define WTERMSIG(s) ((s).w_termsig)
|
||||
# endif /* !WTERMSIG */
|
||||
|
||||
# if !defined (WEXITSTATUS)
|
||||
# define WEXITSTATUS(s) ((s).w_retcode)
|
||||
# endif /* !WEXITSTATUS */
|
||||
|
||||
# if !defined (WIFCORED)
|
||||
# define WIFCORED(s) ((s).w_coredump)
|
||||
# endif /* !WIFCORED */
|
||||
|
||||
#endif /* !_POSIX_VERSION */
|
||||
|
||||
/* I looked it up. For pretty_print_job (). The real answer is 24. */
|
||||
#define LONGEST_SIGNAL_DESC 24
|
||||
|
||||
/* We keep an array of jobs. Each entry in the array is a linked list
|
||||
of processes that are piped together. The first process encountered is
|
||||
the group leader. */
|
||||
|
||||
/* Each child of the shell is remembered in a STRUCT PROCESS. A chain of
|
||||
such structures is a pipeline. The chain is circular. */
|
||||
typedef struct process {
|
||||
struct process *next; /* Next process in the pipeline. A circular chain. */
|
||||
pid_t pid; /* Process ID. */
|
||||
WAIT status; /* The status of this command as returned by wait. */
|
||||
int running; /* Non-zero if this process is running. */
|
||||
char *command; /* The particular program that is running. */
|
||||
} PROCESS;
|
||||
|
||||
/* A description of a pipeline's state. */
|
||||
typedef enum { JRUNNING, JSTOPPED, JDEAD, JMIXED } JOB_STATE;
|
||||
#define JOBSTATE(job) (jobs[(job)]->state)
|
||||
|
||||
/* Values for the FLAGS field in the JOB struct below. */
|
||||
#define J_FOREGROUND 0x01 /* Non-zero if this is running in the foreground. */
|
||||
#define J_NOTIFIED 0x02 /* Non-zero if already notified about job state. */
|
||||
#define J_JOBCONTROL 0x04 /* Non-zero if this job started under job control. */
|
||||
|
||||
typedef struct job {
|
||||
char *wd; /* The working directory at time of invocation. */
|
||||
PROCESS *pipe; /* The pipeline of processes that make up this job. */
|
||||
pid_t pgrp; /* The process ID of the process group (necessary). */
|
||||
JOB_STATE state; /* The state that this job is in. */
|
||||
int flags; /* Flags word: J_NOTIFIED, J_FOREGROUND, or J_JOBCONTROL. */
|
||||
#if defined (JOB_CONTROL)
|
||||
COMMAND *deferred; /* Commands that will execute when this job is done. */
|
||||
#endif /* JOB_CONTROL */
|
||||
} JOB;
|
||||
|
||||
#define NO_JOB -1 /* An impossible job array index. */
|
||||
#define DUP_JOB -2 /* A possible return value for get_job_spec (). */
|
||||
|
||||
/* A value which cannot be a process ID. */
|
||||
#define NO_PID (pid_t)-1
|
||||
|
||||
#if !defined (_POSIX_VERSION) && !defined (sigmask)
|
||||
# define sigmask(x) (1 << ((x)-1))
|
||||
#endif /* !POSIX && !sigmask */
|
||||
|
||||
#if !defined (SIGABRT)
|
||||
# define SIGABRT SIGIOT
|
||||
#endif /* !SIGABRT */
|
||||
|
||||
#if !defined (SIGCHLD)
|
||||
# define SIGCHLD SIGCLD
|
||||
#endif /* !SIGCHLD */
|
||||
|
||||
#if !defined (_POSIX_VERSION)
|
||||
# if !defined (SIG_BLOCK)
|
||||
# define SIG_BLOCK 2
|
||||
# define SIG_SETMASK 3
|
||||
# endif /* SIG_BLOCK */
|
||||
|
||||
/* Type of a signal set. */
|
||||
# define sigset_t int
|
||||
|
||||
/* Make sure there is nothing inside the signal set. */
|
||||
# define sigemptyset(set) (*(set) = 0)
|
||||
|
||||
/* Initialize the signal set to hold all signals. */
|
||||
# define sigfillset(set) (*set) = sigmask (NSIG) - 1
|
||||
|
||||
/* Add SIG to the contents of SET. */
|
||||
# define sigaddset(set, sig) *(set) |= sigmask (sig)
|
||||
|
||||
/* Delete SIG from signal set SET. */
|
||||
# define sigdelset(set, sig) *(set) &= ~sigmask (sig)
|
||||
|
||||
/* Is SIG a member of the signal set SET? */
|
||||
# define sigismember(set, sig) ((*(set) & sigmask (sig)) != 0)
|
||||
|
||||
/* Suspend the process until the reception of one of the signals
|
||||
not present in SET. */
|
||||
# define sigsuspend(set) sigpause (*(set))
|
||||
#endif /* !_POSIX_VERSION */
|
||||
|
||||
/* These definitions are used both in POSIX and non-POSIX implementations. */
|
||||
|
||||
#define BLOCK_SIGNAL(sig, nvar, ovar) \
|
||||
sigemptyset (&nvar); \
|
||||
sigaddset (&nvar, sig); \
|
||||
sigemptyset (&ovar); \
|
||||
sigprocmask (SIG_BLOCK, &nvar, &ovar)
|
||||
|
||||
#if defined (_POSIX_VERSION)
|
||||
# define BLOCK_CHILD(nvar, ovar) \
|
||||
BLOCK_SIGNAL (SIGCHLD, nvar, ovar)
|
||||
# define UNBLOCK_CHILD(ovar) \
|
||||
sigprocmask (SIG_SETMASK, &ovar, (sigset_t *) NULL)
|
||||
#else /* !_POSIX_VERSION */
|
||||
# define BLOCK_CHILD(nvar, ovar) ovar = sigblock (sigmask (SIGCHLD))
|
||||
# define UNBLOCK_CHILD(ovar) sigsetmask (ovar)
|
||||
#endif /* !_POSIX_VERSION */
|
||||
|
||||
/* System calls. */
|
||||
#if !defined (SunOS5) && !defined (USGr4_2) && !defined (__BSD_4_4__)
|
||||
extern pid_t fork (), getpid (), getpgrp ();
|
||||
#endif /* !SunOS5 && !USGr4_2 && !__BSD_4_4__ */
|
||||
|
||||
/* Stuff from the jobs.c file. */
|
||||
extern pid_t original_pgrp, shell_pgrp, pipeline_pgrp;
|
||||
extern pid_t last_made_pid, last_asynchronous_pid;
|
||||
extern int current_job, previous_job;
|
||||
extern int asynchronous_notification;
|
||||
extern JOB **jobs;
|
||||
extern int job_slots;
|
||||
|
||||
extern void making_children __P((void));
|
||||
extern void stop_making_children __P((void));
|
||||
extern void cleanup_the_pipeline __P((void));
|
||||
extern void start_pipeline __P((void));
|
||||
extern int stop_pipeline __P((int, COMMAND *));
|
||||
extern void delete_job __P((int));
|
||||
|
||||
extern void terminate_current_pipeline __P((void));
|
||||
extern void terminate_stopped_jobs __P((void));
|
||||
extern void hangup_all_jobs __P((void));
|
||||
extern void kill_current_pipeline __P((void));
|
||||
|
||||
#if defined (__STDC__) && defined (pid_t)
|
||||
extern void describe_pid __P((int));
|
||||
#else
|
||||
extern void describe_pid __P((pid_t));
|
||||
#endif
|
||||
|
||||
extern int list_one_job __P((JOB *, int, int, int));
|
||||
extern void list_jobs __P((int));
|
||||
|
||||
extern pid_t make_child __P((char *, int));
|
||||
extern int get_tty_state __P((void));
|
||||
extern int set_tty_state __P((void));
|
||||
|
||||
extern int wait_for_single_pid __P((pid_t));
|
||||
extern void wait_for_background_pids __P((void));
|
||||
extern int wait_for __P((pid_t));
|
||||
extern int wait_for_job __P((int));
|
||||
|
||||
extern void notify_and_cleanup __P((void));
|
||||
extern void reap_dead_jobs __P((void));
|
||||
extern int start_job __P((int, int));
|
||||
extern int kill_pid __P((pid_t, int, int));
|
||||
extern int initialize_jobs __P((void));
|
||||
extern void initialize_job_signals __P((void));
|
||||
extern int give_terminal_to __P((pid_t));
|
||||
|
||||
extern int set_job_control __P((int));
|
||||
extern void without_job_control __P((void));
|
||||
extern void end_job_control __P((void));
|
||||
extern void restart_job_control __P((void));
|
||||
extern void set_sigchld_handler __P((void));
|
||||
|
||||
#if defined (JOB_CONTROL)
|
||||
extern int job_control;
|
||||
#endif
|
||||
|
||||
#endif /* __JOBS_H__ */
|
||||
Loading…
Add table
Add a link
Reference in a new issue