12aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm/** @file 22aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm Implementation of fopen as declared in <stdio.h>. 32aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm 40c1992fbccd139e9d3bb730c19a79847c6a5a246darylm Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR> 52aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm This program and the accompanying materials are licensed and made available 62aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm under the terms and conditions of the BSD License that accompanies this 72aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm distribution. The full text of the license may be found at 82aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm http://opensource.org/licenses/bsd-license.php. 92aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm 102aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 112aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 122aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm 132aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm Copyright (c) 1990, 1993 142aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm The Regents of the University of California. All rights reserved. 152aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm 162aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm This code is derived from software contributed to Berkeley by 172aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm Chris Torek. 182aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm 192aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm Redistribution and use in source and binary forms, with or without 202aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm modification, are permitted provided that the following conditions 212aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm are met: 222aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm - Redistributions of source code must retain the above copyright 232aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm notice, this list of conditions and the following disclaimer. 242aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm - Redistributions in binary form must reproduce the above copyright 252aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm notice, this list of conditions and the following disclaimer in the 262aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm documentation and/or other materials provided with the distribution. 272aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm - Neither the name of the University nor the names of its contributors 282aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm may be used to endorse or promote products derived from this software 292aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm without specific prior written permission. 302aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm 312aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 322aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 332aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 342aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE 352aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 362aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 372aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 382aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 392aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 402aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 412aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm POSSIBILITY OF SUCH DAMAGE. 422aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm 432aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm NetBSD: fopen.c,v 1.12 2003/08/07 16:43:24 agc Exp 442aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm fopen.c 8.1 (Berkeley) 6/4/93" 452aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm**/ 462aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm#include <LibConfig.h> 472aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm#include <sys/EfiCdefs.h> 482aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm 492aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm#include <sys/types.h> 502aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm#include <sys/stat.h> 512aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm#include <assert.h> 522aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm#include <fcntl.h> 532aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm#include <stdio.h> 542aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm#include <errno.h> 550c1992fbccd139e9d3bb730c19a79847c6a5a246darylm#include <unistd.h> 562aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm#include "reentrant.h" 572aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm#include "local.h" 582aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm 592aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylmFILE * 602aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylmfopen(const char *file, const char *mode) 612aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm{ 622aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm FILE *fp; 632aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm int f; 642aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm int flags, oflags; 652aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm 662aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm _DIAGASSERT(file != NULL); 672aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm if ((flags = __sflags(mode, &oflags)) == 0) 682aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm return (NULL); 692aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm if ((fp = __sfp()) == NULL) 702aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm return (NULL); 712aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm if ((f = open(file, oflags, DEFFILEMODE)) < 0) 722aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm goto release; 732aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm if (oflags & O_NONBLOCK) { 742aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm struct stat st; 752aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm if (fstat(f, &st) == -1) { 762aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm int sverrno = errno; 772aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm (void)close(f); 782aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm errno = sverrno; 792aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm goto release; 802aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm } 812aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm if (!S_ISREG(st.st_mode)) { 822aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm (void)close(f); 832aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm errno = EFTYPE; 842aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm goto release; 852aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm } 862aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm } 872aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm fp->_file = (short)f; 882aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm fp->_flags = (unsigned short)flags; 892aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm fp->_cookie = fp; 902aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm fp->_read = __sread; 912aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm fp->_write = __swrite; 922aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm fp->_seek = __sseek; 932aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm fp->_close = __sclose; 942aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm 952aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm /* 962aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm * When opening in append mode, even though we use O_APPEND, 972aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm * we need to seek to the end so that ftell() gets the right 982aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm * answer. If the user then alters the seek pointer, or 992aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm * the file extends, this will fail, but there is not much 1002aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm * we can do about this. (We could set __SAPP and check in 1012aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm * fseek and ftell.) 1022aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm */ 1032aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm if (oflags & O_APPEND) 1042aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm (void) __sseek((void *)fp, (fpos_t)0, SEEK_END); 1052aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm return (fp); 1062aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylmrelease: 1072aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm fp->_flags = 0; /* release */ 1082aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm return (NULL); 1092aa62f2bc9a9654687b377d9ca8a8c2c860a3852darylm} 110