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Diffstat (limited to 'lib/libpthread/thread/thr_close.c')
| -rw-r--r-- | lib/libpthread/thread/thr_close.c | 96 |
1 files changed, 0 insertions, 96 deletions
diff --git a/lib/libpthread/thread/thr_close.c b/lib/libpthread/thread/thr_close.c deleted file mode 100644 index 26a8fbf..0000000 --- a/lib/libpthread/thread/thr_close.c +++ /dev/null @@ -1,96 +0,0 @@ -/* - * 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 <stdlib.h> -#include <unistd.h> -#include <fcntl.h> -#include <sys/stat.h> -#ifdef _THREAD_SAFE -#include <pthread.h> -#include "pthread_private.h" - -int -close(int fd) -{ - int flags; - int ret; - int status; - struct stat sb; - - /* Lock the file descriptor while the file is closed: */ - if ((ret = _thread_fd_lock(fd, FD_RDWR, NULL, __FILE__, __LINE__)) == 0) { - /* Block signals: */ - _thread_kern_sig_block(&status); - - /* Get file descriptor status. */ - fstat(fd, &sb); - - /* - * Check if the file should be left as blocking. - * - * This is so that the file descriptors shared with a parent - * process aren't left set to non-blocking if the child - * closes them prior to exit. An example where this causes - * problems with /bin/sh is when a child closes stdin. - * - * Setting a file as blocking causes problems if a threaded - * parent accesses the file descriptor before the child exits. - * Once the threaded parent receives a SIGCHLD then it resets - * all of its files to non-blocking, and so it is then safe - * to access them. - * - * Pipes are not set to blocking when they are closed, as - * the parent and child will normally close the file - * descriptor of the end of the pipe that they are not - * using, which would then cause any reads to block - * indefinitely. - */ - if ((S_ISREG(sb.st_mode) || S_ISCHR(sb.st_mode)) && (_thread_fd_table[fd]->flags & O_NONBLOCK) == 0) { - /* Get the current flags: */ - flags = _thread_sys_fcntl(fd, F_GETFL, NULL); - /* Clear the nonblocking file descriptor flag: */ - _thread_sys_fcntl(fd, F_SETFL, flags & ~O_NONBLOCK); - } - - /* Close the file descriptor: */ - ret = _thread_sys_close(fd); - - /* Free the file descriptor table entry: */ - free(_thread_fd_table[fd]); - _thread_fd_table[fd] = NULL; - - /* Unblock signals again: */ - _thread_kern_sig_unblock(status); - } - return (ret); -} -#endif |
