diff options
Diffstat (limited to 'lib/libc_r/uthread/uthread_execve.c')
-rw-r--r-- | lib/libc_r/uthread/uthread_execve.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/lib/libc_r/uthread/uthread_execve.c b/lib/libc_r/uthread/uthread_execve.c new file mode 100644 index 0000000..6e1fda5 --- /dev/null +++ b/lib/libc_r/uthread/uthread_execve.c @@ -0,0 +1,87 @@ +/* + * 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 |