114 lines
4.0 KiB
C
114 lines
4.0 KiB
C
/*
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* Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by John Birrell.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: uthread_execve.c,v 1.6 1999/06/20 08:28:17 jb Exp $
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <unistd.h>
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#ifdef _THREAD_SAFE
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#include <pthread.h>
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#include "pthread_private.h"
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int
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execve(const char *name, char *const * argv, char *const * envp)
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{
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int flags;
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int i;
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int ret;
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struct sigaction act;
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struct sigaction oact;
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struct itimerval itimer;
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/* Disable the interval timer: */
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itimer.it_interval.tv_sec = 0;
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itimer.it_interval.tv_usec = 0;
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itimer.it_value.tv_sec = 0;
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itimer.it_value.tv_usec = 0;
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setitimer(_ITIMER_SCHED_TIMER, &itimer, NULL);
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/* Close the pthread kernel pipe: */
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_thread_sys_close(_thread_kern_pipe[0]);
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_thread_sys_close(_thread_kern_pipe[1]);
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/*
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* Enter a loop to set all file descriptors to blocking
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* if they were not created as non-blocking:
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*/
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for (i = 0; i < _thread_dtablesize; i++) {
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/* Check if this file descriptor is in use: */
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if (_thread_fd_table[i] != NULL &&
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!(_thread_fd_table[i]->flags & O_NONBLOCK)) {
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/* Get the current flags: */
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flags = _thread_sys_fcntl(i, F_GETFL, NULL);
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/* Clear the nonblocking file descriptor flag: */
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_thread_sys_fcntl(i, F_SETFL, flags & ~O_NONBLOCK);
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}
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}
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/* Enter a loop to adopt the signal actions for the running thread: */
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for (i = 1; i < NSIG; i++) {
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/* Check for signals which cannot be caught: */
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if (i == SIGKILL || i == SIGSTOP) {
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/* Don't do anything with these signals. */
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} else {
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/* Check if ignoring this signal: */
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if (_thread_sigact[i - 1].sa_handler == SIG_IGN) {
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/* Continue to ignore this signal: */
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act.sa_handler = SIG_IGN;
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} else {
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/* Use the default handler for this signal: */
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act.sa_handler = SIG_DFL;
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}
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/* Copy the mask and flags for this signal: */
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act.sa_mask = _thread_sigact[i - 1].sa_mask;
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act.sa_flags = _thread_sigact[i - 1].sa_flags;
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/* Ensure the scheduling signal is masked: */
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sigaddset(&act.sa_mask, _SCHED_SIGNAL);
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/* Change the signal action for the process: */
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_thread_sys_sigaction(i, &act, &oact);
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}
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}
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/* Set the signal mask: */
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_thread_sys_sigprocmask(SIG_SETMASK, &_thread_run->sigmask, NULL);
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/* Execute the process: */
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ret = _thread_sys_execve(name, argv, envp);
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/* Return the completion status: */
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return (ret);
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}
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#endif
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