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Diffstat (limited to 'StdLib/LibC/Stdio/freopen.c')
| -rw-r--r-- | StdLib/LibC/Stdio/freopen.c | 200 |
1 files changed, 0 insertions, 200 deletions
diff --git a/StdLib/LibC/Stdio/freopen.c b/StdLib/LibC/Stdio/freopen.c deleted file mode 100644 index 58381e6d19..0000000000 --- a/StdLib/LibC/Stdio/freopen.c +++ /dev/null @@ -1,200 +0,0 @@ -/** @file
- Implementation of freopen as declared in <stdio.h>.
-
- Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>
- This program and the accompanying materials are licensed and made available
- under the terms and conditions of the BSD License that accompanies this
- distribution. The full text of the license may be found at
- http://opensource.org/licenses/bsd-license.
-
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
-
- Copyright (c) 1990, 1993
- 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:
- - Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- - 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.
- - 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDERS 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.
-
- NetBSD: freopen.c,v 1.14 2003/08/07 16:43:25 agc Exp
- freopen.c 8.1 (Berkeley) 6/4/93
-**/
-#include <LibConfig.h>
-#include <sys/EfiCdefs.h>
-
-#include <sys/types.h>
-#include <sys/stat.h>
-
-#include <assert.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <wchar.h>
-#include <unistd.h>
-#include "reentrant.h"
-#include "local.h"
-
-/*
- * 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(const char *file, const char *mode, FILE *fp)
-{
- int f;
- int flags, isopen, oflags, sverrno, wantfd;
-
- _DIAGASSERT(file != NULL);
- _DIAGASSERT(mode != NULL);
- _DIAGASSERT(fp != NULL);
- if(fp == NULL) {
- errno = EINVAL;
- return (NULL);
- }
-
- if ((flags = __sflags(mode, &oflags)) == 0) {
- (void) fclose(fp);
- return (NULL);
- }
-
- if (!__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.
- */
- if (fp->_flags == 0) {
- fp->_flags = __SEOF; /* hold on to it */
- isopen = 0;
- wantfd = -1;
- } else {
- /* flush the stream; ANSI doesn't require this. */
- if (fp->_flags & __SWR)
- (void) __sflush(fp);
- /* if close is NULL, closing is a no-op, hence pointless */
- isopen = fp->_close != NULL;
- if (((wantfd = fp->_file) >= 0) && isopen) {
- (void) (*fp->_close)(fp->_cookie);
- isopen = 0;
- }
- }
-
- /* Get a new descriptor to refer to the new file. */
- f = open(file, oflags, DEFFILEMODE);
- if (f < 0 && isopen) {
- /* If out of fd's close the old one and try again. */
- if (errno == ENFILE || errno == EMFILE) {
- (void) (*fp->_close)(fp->_cookie);
- isopen = 0;
- f = open(file, oflags, DEFFILEMODE);
- }
- }
- sverrno = errno;
-
- /*
- * Finish closing fp. Even if the open succeeded above, 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.
- */
- if (isopen && (f != wantfd))
- (void) (*fp->_close)(fp->_cookie);
- 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);
- WCIO_FREE(fp);
- _UB(fp)._size = 0;
- if (HASLB(fp))
- FREELB(fp);
- fp->_lb._size = 0;
-
- if (f < 0) { /* did not get it after all */
- fp->_flags = 0; /* set it free */
- errno = sverrno; /* restore in case _close clobbered */
- return (NULL);
- }
-
- if (oflags & O_NONBLOCK) {
- struct stat st;
- if (fstat(f, &st) == -1) {
- sverrno = errno;
- (void)close(f);
- errno = sverrno;
- return (NULL);
- }
- if (!S_ISREG(st.st_mode)) {
- (void)close(f);
- errno = EFTYPE;
- return (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.
- */
- if (wantfd >= 0 && f != wantfd) {
- if (dup2(f, wantfd) >= 0) {
- (void) close(f);
- f = wantfd;
- }
- }
-
- fp->_flags = (unsigned short)flags;
- fp->_file = (short)f;
- fp->_cookie = fp;
- fp->_read = __sread;
- fp->_write = __swrite;
- fp->_seek = __sseek;
- fp->_close = __sclose;
-
- /*
- * When reopening in append mode, even though we use O_APPEND,
- * we need to seek to the end so that ftell() gets the right
- * answer. If the user then alters the seek pointer, or
- * the file extends, this will fail, but there is not much
- * we can do about this. (We could set __SAPP and check in
- * fseek and ftell.)
- */
- if (oflags & O_APPEND)
- (void) __sseek((void *)fp, (fpos_t)0, SEEK_END);
- return (fp);
-}
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