diff options
Diffstat (limited to 'lib/libpthread/stdio/freopen.c')
| -rw-r--r-- | lib/libpthread/stdio/freopen.c | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/lib/libpthread/stdio/freopen.c b/lib/libpthread/stdio/freopen.c deleted file mode 100644 index c7ab61c061a..00000000000 --- a/lib/libpthread/stdio/freopen.c +++ /dev/null @@ -1,146 +0,0 @@ -/*- - * Copyright (c) 1990 The Regents of the University of California. - * All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Chris Torek. - * - * 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 the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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. - */ - -#if defined(LIBC_SCCS) && !defined(lint) -/*static char *sccsid = "from: @(#)freopen.c 5.6 (Berkeley) 2/24/91";*/ -static char *rcsid = "$Id: freopen.c,v 1.1 1995/10/18 08:43:07 deraadt Exp $"; -#endif /* LIBC_SCCS and not lint */ - -#include <pthread.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <errno.h> -#include <unistd.h> -#include <stdio.h> -#include <stdlib.h> -#include "local.h" - -extern pthread_mutex_t __sfp_mutex; -extern pthread_cond_t __sfp_cond; -extern int __sfp_state; - -/* - * Re-direct an existing, open (probably) file to some other file. - * ANSI is written such that the original file gets closed if at - * all possible, no matter what. - */ -FILE * -freopen(file, mode, fp) - const char *file, *mode; - register FILE *fp; -{ - int f, flags, oflags; - FILE *ret; - - if ((flags = __sflags(mode, &oflags)) == 0) { - (void) fclose(fp); - return (NULL); - } - - pthread_once(&__sdidinit, __sinit); - - /* - * There are actually programs that depend on being able to "freopen" - * descriptors that weren't originally open. Keep this from breaking. - * Remember whether the stream was open to begin with, and which file - * descriptor (if any) was associated with it. If it was attached to - * a descriptor, defer closing it; freopen("/dev/stdin", "r", stdin) - * should work. This is unnecessary if it was not a Unix file. - */ - /* while lock __sfp_mutex, to block out fopen, and other freopen calls */ - while (pthread_mutex_lock(&__sfp_mutex) == OK) { - if (ftrylockfile(fp) == OK) { - if (fp->_flags) { - /* flush the stream; ANSI doesn't require this. */ - if (fp->_flags & __SWR) - (void) __sflush(fp); - __sclose(fp); - /* - * Finish closing fp. We cannot keep fp->_base: - * it may be the wrong size. This loses the effect - * of any setbuffer calls, but stdio has always done - * this before. - * NOTE: We do this even if __ftrylockfilr failed with - * an error to avoid memory leaks. - */ - if (fp->_flags & __SMBF) - free((char *)fp->_bf._base); - fp->_w = 0; - fp->_r = 0; - fp->_p = NULL; - fp->_bf._base = NULL; - fp->_bf._size = 0; - fp->_lbfsize = 0; - if (HASUB(fp)) - FREEUB(fp); - fp->_ub._size = 0; - if (HASLB(fp)) - FREELB(fp); - fp->_lb._size = 0; - } - /* Get a new descriptor to refer to the new file. */ - if ((f = open(file, oflags, 0666)) < OK) - ret = NULL; - /* - * If reopening something that was open before on a real file, try - * to maintain the descriptor. Various C library routines (perror) - * assume stderr is always fd STDERR_FILENO, even if being freopen'd. - */ - /* Testing f == fp->_file may no longer be necessary */ - if (fp->_file >= 0 && f != fp->_file) { - if (dup2(f, fp->_file) >= OK) { - (void)close(f); - f = fp->_file; - } - } - fp->_flags = flags; - fp->_file = f; - ret = fp; - break; - } else { - /* unlock __sfp_mutex, and try again later */ - pthread_mutex_unlock(&__sfp_mutex); - pthread_yield(); - continue; - } - pthread_mutex_unlock(&__sfp_mutex); - funlockfile(fp); - return(ret); - } - (void)fclose(fp); - return(NULL); -} |