_exit.c
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上传日期:2007-04-14
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文件大小:3k
- /* ==== _exit.c ============================================================
- * Copyright (c) 1994 by Chris Provenzano, proven@mit.edu
- * 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 Chris Provenzano.
- * 4. The name of Chris Provenzano may not be used to endorse or promote
- * products derived from this software without specific prior written
- * permission.
- *
- * THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO ``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 CHRIS PROVENZANO 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.
- *
- * Description : The locking functions for stdio.
- *
- * 1.00 94/09/04 proven
- * -Started coding this file.
- */
- #ifndef lint
- static const char rcsid[] = "$Id$";
- #endif
- #include <pthread.h>
- #include <fcntl.h>
- /* ==========================================================================
- * _exit()
- *
- * Change all file descriptors back to their original state,
- * before exiting for good.
- */
- void _exit(int status)
- {
- int fd;
- pthread_sched_prevent();
- for (fd = 0; fd < dtablesize; fd++) {
- if (fd_table[fd] == NULL) {
- continue;
- }
- /* Is it a kernel fd ? */
- if ((!fd_table[fd]->ops) || (fd_table[fd]->ops->use_kfds != 1)) {
- continue;
- }
- switch (fd_table[fd]->type) {
- case FD_HALF_DUPLEX:
- machdep_sys_fcntl(fd_table[fd]->fd.i, F_SETFL, fd_table[fd]->flags);
- fd_table[fd]->type = FD_TEST_HALF_DUPLEX;
- break;
- case FD_FULL_DUPLEX:
- machdep_sys_fcntl(fd_table[fd]->fd.i, F_SETFL, fd_table[fd]->flags);
- fd_table[fd]->type = FD_TEST_FULL_DUPLEX;
- break;
- default:
- break;
- }
- }
- machdep_sys_exit(status);
- }