freebsd-dev/lib/libc_r/uthread/uthread_execve.c
Julian Elischer 012dfd00b3 Reviewed by: julian
Submitted by:	 john birrel

One version of the pthreads library
another will follow with differnt actions under some cases..
not QUITE complete
1996-01-22 00:23:58 +00:00

88 lines
3.1 KiB
C

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