add directory bin
This commit is contained in:
gohigh
306
bin/old/bash/bash-1.05/nojobs.c
Normal file
306
bin/old/bash/bash-1.05/nojobs.c
Normal file
@@ -0,0 +1,306 @@
|
||||
/* The thing that makes children, remembers them, and contains wait loops. */
|
||||
/* this will probably only work with System V */
|
||||
|
||||
/* Copyright (C) 1987,1989 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 1, 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. */
|
||||
|
||||
#include <stdio.h>
|
||||
#include <sys/types.h>
|
||||
/*#include <sys/ttold.h>*/
|
||||
#include <fcntl.h>
|
||||
#include <termio.h>
|
||||
#include <signal.h>
|
||||
#include <setjmp.h>
|
||||
#include <errno.h>
|
||||
|
||||
#include "config.h"
|
||||
#include "general.h"
|
||||
#include "jobs.h"
|
||||
|
||||
#ifndef SIGABRT
|
||||
#define SIGABRT SIGIOT
|
||||
#endif
|
||||
|
||||
#ifdef MINIX
|
||||
#define TCGETA TIOCGETP
|
||||
#define TCSETAW TIOCSETP
|
||||
#endif
|
||||
|
||||
#if defined(SYSV) || defined(MINIX)
|
||||
#define killpg(pg, sig) kill(-(pg),(sig))
|
||||
#endif /* SYSV */
|
||||
|
||||
#if defined(SYSV) || defined(HPUX)
|
||||
int siginterrupt (sig, flag) int sig, flag; { return 0; }
|
||||
#endif
|
||||
|
||||
int last_made_pid = -1;
|
||||
int last_asynchronous_pid = -1;
|
||||
|
||||
/*
|
||||
* Initialize the job control mechanism, and set up the tty stuff.
|
||||
*/
|
||||
initialize_jobs ()
|
||||
{
|
||||
}
|
||||
|
||||
/*
|
||||
* Setup this shell to handle C-C, etc.
|
||||
*/
|
||||
initialize_job_signals ()
|
||||
{
|
||||
extern int login_shell;
|
||||
extern sighandler throw_to_top_level ();
|
||||
|
||||
signal (SIGINT, throw_to_top_level);
|
||||
signal (SIGQUIT, SIG_IGN);
|
||||
|
||||
/* If this is a login shell we don't wish to be disturbed by
|
||||
stop signals. */
|
||||
if (login_shell)
|
||||
{
|
||||
#ifdef SIGSTOP
|
||||
signal (SIGSTOP, SIG_IGN);
|
||||
#endif
|
||||
#ifdef SIGTSTP
|
||||
signal (SIGTSTP, SIG_IGN);
|
||||
signal (SIGTTOU, SIG_IGN);
|
||||
signal (SIGTTIN, SIG_IGN);
|
||||
#endif
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Fork, handling errors. Returns the pid of the newly made child, or 0.
|
||||
* COMMAND is just for remembering the name of the command; we don't do
|
||||
* anything else with it. ASYNC_P says what to do with the tty. If
|
||||
* non-zero, then don't give it away.
|
||||
*/
|
||||
int
|
||||
make_child (command, async_p)
|
||||
char *command;
|
||||
int async_p;
|
||||
{
|
||||
int pid;
|
||||
|
||||
/* Discard saved memory. */
|
||||
if (command)
|
||||
free (command);
|
||||
|
||||
/* Make new environment array if neccessary. */
|
||||
maybe_make_export_env ();
|
||||
|
||||
/* Create the child, handle severe errors. */
|
||||
if ((pid = fork ()) < 0)
|
||||
{
|
||||
report_error ("Memory exhausted or process overflow!");
|
||||
throw_to_top_level ();
|
||||
}
|
||||
|
||||
if (!pid)
|
||||
{
|
||||
/*
|
||||
* Ignore INT and QUIT in asynchronous children.
|
||||
*/
|
||||
if (async_p)
|
||||
{
|
||||
signal (SIGINT, SIG_IGN);
|
||||
signal (SIGQUIT, SIG_IGN);
|
||||
last_asynchronous_pid = getpid ();
|
||||
}
|
||||
else
|
||||
{
|
||||
signal (SIGINT, SIG_DFL);
|
||||
signal (SIGQUIT, SIG_DFL);
|
||||
}
|
||||
|
||||
/* Children are easily terminated with SIGTERM. */
|
||||
signal (SIGTERM, SIG_DFL);
|
||||
|
||||
/* Set the resource limits for this child. (In ulimit.c). */
|
||||
set_process_resource_limits ();
|
||||
}
|
||||
else
|
||||
{
|
||||
/*
|
||||
* In the parent.
|
||||
*/
|
||||
last_made_pid = pid;
|
||||
|
||||
if (async_p)
|
||||
last_asynchronous_pid = pid;
|
||||
}
|
||||
return (pid);
|
||||
}
|
||||
|
||||
/* Wait for a single pid (PID) and return its exit status. */
|
||||
|
||||
wait_for_single_pid (pid)
|
||||
int pid;
|
||||
{
|
||||
int got_pid;
|
||||
union wait status;
|
||||
|
||||
while ((got_pid = wait (&status)) != pid)
|
||||
{
|
||||
if (got_pid < 0)
|
||||
{
|
||||
if (errno != EINTR && errno != ECHILD)
|
||||
file_error ("wait");
|
||||
break;
|
||||
}
|
||||
}
|
||||
QUIT;
|
||||
}
|
||||
|
||||
/* Wait for all of the shell's children to exit. */
|
||||
|
||||
wait_for_background_pids ()
|
||||
{
|
||||
/* If we aren't using job control, we let the kernel take care of the
|
||||
bookkeeping for us. wait () will return -1 and set errno to ECHILD
|
||||
when there are no more unwaited-for child processes on both 4.2BSD-based
|
||||
and System V-based systems. */
|
||||
|
||||
while (1)
|
||||
{
|
||||
int got_pid;
|
||||
union wait status;
|
||||
|
||||
while ((got_pid = wait(&status)) != -1) /* wait for ECHILD */
|
||||
;
|
||||
if (errno != EINTR && errno != ECHILD)
|
||||
file_error("wait");
|
||||
break;
|
||||
}
|
||||
|
||||
QUIT;
|
||||
}
|
||||
|
||||
/*
|
||||
* Wait for pid (one of our children) to terminate.
|
||||
*/
|
||||
int
|
||||
wait_for (pid)
|
||||
int pid;
|
||||
{
|
||||
extern int interactive;
|
||||
int got_pid, return_val, oldmask;
|
||||
union wait status;
|
||||
|
||||
while ((got_pid = wait (&status)) != pid)
|
||||
{
|
||||
if (got_pid < 0 && errno == ECHILD)
|
||||
{
|
||||
status.w_termsig = status.w_retcode = 0;
|
||||
break;
|
||||
}
|
||||
else if (got_pid < 0 && errno != EINTR)
|
||||
programming_error ("got errno %d while waiting for %d", errno, pid);
|
||||
}
|
||||
|
||||
if (interactive) /* allow the user to ^C out of the builtin wait */
|
||||
QUIT;
|
||||
|
||||
/* Default return value. */
|
||||
return_val = status.w_retcode & 0x7f;
|
||||
|
||||
if (status.w_termsig != 0 && status.w_termsig != WSTOPPED)
|
||||
{
|
||||
extern char *sys_siglist[];
|
||||
fprintf (stderr, "%s", sys_siglist[status.w_termsig]);
|
||||
if (status.w_coredump)
|
||||
fprintf (stderr, " (core dumped)");
|
||||
fprintf (stderr, "\n");
|
||||
return_val = status.w_termsig + 128;
|
||||
}
|
||||
|
||||
if (status.w_termsig != 0)
|
||||
set_tty_state ();
|
||||
else
|
||||
get_tty_state ();
|
||||
|
||||
return (return_val);
|
||||
}
|
||||
|
||||
/* Give PID SIGNAL. This determines what job the pid belongs to (if any).
|
||||
If PID does belong to a job, and the job is stopped, then CONTinue the
|
||||
job after giving it SIGNAL. Returns -1 on failure. If GROUP is non-null,
|
||||
then kill the process group associated with PID. */
|
||||
int
|
||||
kill_pid (pid, signal, group)
|
||||
int pid, signal, group;
|
||||
{
|
||||
int result;
|
||||
|
||||
if (group)
|
||||
result = killpg (pid, signal);
|
||||
else
|
||||
result = kill (pid, signal);
|
||||
|
||||
return (result);
|
||||
}
|
||||
|
||||
static struct termio shell_tty_info;
|
||||
|
||||
/* Fill the contents of shell_tty_info with the current tty info. */
|
||||
get_tty_state ()
|
||||
{
|
||||
int tty = open ("/dev/tty", O_RDONLY);
|
||||
if (tty != -1)
|
||||
{
|
||||
ioctl (tty, TCGETA, &shell_tty_info);
|
||||
close (tty);
|
||||
}
|
||||
}
|
||||
|
||||
/* Make the current tty use the state in shell_tty_info. */
|
||||
set_tty_state ()
|
||||
{
|
||||
int tty = open ("/dev/tty", O_RDONLY);
|
||||
if (tty != -1)
|
||||
{
|
||||
ioctl (tty, TCSETAW, &shell_tty_info); /* Wait for output, no flush */
|
||||
close (tty);
|
||||
}
|
||||
}
|
||||
|
||||
/* Give the terminal to PGRP. */
|
||||
give_terminal_to (pgrp)
|
||||
int pgrp;
|
||||
{
|
||||
}
|
||||
|
||||
/*
|
||||
* stop a pipeline
|
||||
*/
|
||||
stop_pipeline (async, ignore)
|
||||
int async;
|
||||
char *ignore;
|
||||
{
|
||||
}
|
||||
|
||||
/*
|
||||
* Print descriptive information about the job with leader pid PID.
|
||||
*/
|
||||
|
||||
describe_pid (pid)
|
||||
int pid;
|
||||
{
|
||||
fprintf (stderr, "<%d>\n", pid);
|
||||
}
|
||||
Reference in New Issue
Block a user