mirror of https://github.com/acidanthera/audk.git
110 lines
3.9 KiB
C
110 lines
3.9 KiB
C
/** @file
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Implementation of fopen as declared in <stdio.h>.
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Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials are licensed and made available
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under the terms and conditions of the BSD License that accompanies this
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distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php.
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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Copyright (c) 1990, 1993
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The Regents of the University of California. All rights reserved.
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This code is derived from software contributed to Berkeley by
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Chris Torek.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of the University nor the names of its contributors
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may be used to endorse or promote products derived from this software
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without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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NetBSD: fopen.c,v 1.12 2003/08/07 16:43:24 agc Exp
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fopen.c 8.1 (Berkeley) 6/4/93"
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**/
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#include <LibConfig.h>
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#include <sys/EfiCdefs.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <assert.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <errno.h>
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#include <unistd.h>
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#include "reentrant.h"
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#include "local.h"
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FILE *
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fopen(const char *file, const char *mode)
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{
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FILE *fp;
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int f;
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int flags, oflags;
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_DIAGASSERT(file != NULL);
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if ((flags = __sflags(mode, &oflags)) == 0)
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return (NULL);
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if ((fp = __sfp()) == NULL)
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return (NULL);
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if ((f = open(file, oflags, DEFFILEMODE)) < 0)
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goto release;
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if (oflags & O_NONBLOCK) {
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struct stat st;
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if (fstat(f, &st) == -1) {
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int sverrno = errno;
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(void)close(f);
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errno = sverrno;
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goto release;
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}
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if (!S_ISREG(st.st_mode)) {
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(void)close(f);
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errno = EFTYPE;
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goto release;
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}
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}
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fp->_file = (short)f;
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fp->_flags = (unsigned short)flags;
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fp->_cookie = fp;
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fp->_read = __sread;
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fp->_write = __swrite;
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fp->_seek = __sseek;
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fp->_close = __sclose;
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/*
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* When opening in append mode, even though we use O_APPEND,
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* we need to seek to the end so that ftell() gets the right
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* answer. If the user then alters the seek pointer, or
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* the file extends, this will fail, but there is not much
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* we can do about this. (We could set __SAPP and check in
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* fseek and ftell.)
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*/
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if (oflags & O_APPEND)
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(void) __sseek((void *)fp, (fpos_t)0, SEEK_END);
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return (fp);
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release:
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fp->_flags = 0; /* release */
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return (NULL);
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}
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