diff options
Diffstat (limited to 'lib/libc_r/uthread/uthread_execve.c')
| -rw-r--r-- | lib/libc_r/uthread/uthread_execve.c | 115 |
1 files changed, 115 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..c0aa31c --- /dev/null +++ b/lib/libc_r/uthread/uthread_execve.c @@ -0,0 +1,115 @@ +/* + * Copyright (c) 1995-1998 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 AUTHOR 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. + * + * $FreeBSD$ + */ +#include <errno.h> +#include <fcntl.h> +#include <unistd.h> +#include <pthread.h> +#include "pthread_private.h" + +__weak_reference(_execve, execve); + +int +_execve(const char *name, char *const * argv, char *const * envp) +{ + struct pthread *curthread = _get_curthread(); + int flags; + int i; + int ret; + struct sigaction act; + struct sigaction oact; + struct itimerval itimer; + + /* Disable the interval timer: */ + itimer.it_interval.tv_sec = 0; + itimer.it_interval.tv_usec = 0; + itimer.it_value.tv_sec = 0; + itimer.it_value.tv_usec = 0; + setitimer(_ITIMER_SCHED_TIMER, &itimer, NULL); + + /* Close the pthread kernel pipe: */ + __sys_close(_thread_kern_pipe[0]); + __sys_close(_thread_kern_pipe[1]); + + /* + * Enter a loop to set all file descriptors to blocking + * if they were not created as non-blocking: + */ + for (i = 0; i < _thread_dtablesize; i++) { + /* Check if this file descriptor is in use: */ + if (_thread_fd_table[i] != NULL && + (_thread_fd_getflags(i) & O_NONBLOCK) == 0) { + /* Skip if the close-on-exec flag is set */ + flags = __sys_fcntl(i, F_GETFD, NULL); + if ((flags & FD_CLOEXEC) != 0) + continue; /* don't bother, no point */ + /* Get the current flags: */ + flags = __sys_fcntl(i, F_GETFL, NULL); + /* Clear the nonblocking file descriptor flag: */ + __sys_fcntl(i, F_SETFL, flags & ~O_NONBLOCK); + } + } + + /* 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 ignoring this signal: */ + if (_thread_sigact[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_sigact[i - 1].sa_mask; + act.sa_flags = _thread_sigact[i - 1].sa_flags; + + /* Change the signal action for the process: */ + __sys_sigaction(i, &act, &oact); + } + } + + /* Set the signal mask: */ + __sys_sigprocmask(SIG_SETMASK, &curthread->sigmask, NULL); + + /* Execute the process: */ + ret = __sys_execve(name, argv, envp); + + /* Return the completion status: */ + return (ret); +} |
