1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29#include <fcntl.h> 30#include <stdarg.h> 31#include <stdlib.h> 32#include <unistd.h> 33 34#include "private/libc_logging.h" 35 36extern "C" int __openat(int, const char*, int, int); 37 38static inline int force_O_LARGEFILE(int flags) { 39#if __LP64__ 40 return flags; // No need, and aarch64's strace gets confused. 41#else 42 return flags | O_LARGEFILE; 43#endif 44} 45 46int creat(const char* pathname, mode_t mode) { 47 return open(pathname, O_CREAT | O_TRUNC | O_WRONLY, mode); 48} 49__strong_alias(creat64, creat); 50 51int open(const char* pathname, int flags, ...) { 52 mode_t mode = 0; 53 54 if ((flags & O_CREAT) != 0) { 55 va_list args; 56 va_start(args, flags); 57 mode = static_cast<mode_t>(va_arg(args, int)); 58 va_end(args); 59 } 60 61 return __openat(AT_FDCWD, pathname, force_O_LARGEFILE(flags), mode); 62} 63__strong_alias(open64, open); 64 65int __open_2(const char* pathname, int flags) { 66 if (__predict_false((flags & O_CREAT) != 0)) { 67 __fortify_chk_fail("open(O_CREAT): called without specifying a mode", 0); 68 } 69 70 return __openat(AT_FDCWD, pathname, force_O_LARGEFILE(flags), 0); 71} 72 73int openat(int fd, const char *pathname, int flags, ...) { 74 mode_t mode = 0; 75 76 if ((flags & O_CREAT) != 0) { 77 va_list args; 78 va_start(args, flags); 79 mode = static_cast<mode_t>(va_arg(args, int)); 80 va_end(args); 81 } 82 83 return __openat(fd, pathname, force_O_LARGEFILE(flags), mode); 84} 85__strong_alias(openat64, openat); 86 87int __openat_2(int fd, const char* pathname, int flags) { 88 if ((flags & O_CREAT) != 0) { 89 __fortify_chk_fail("openat(O_CREAT): called without specifying a mode", 0); 90 } 91 92 return __openat(fd, pathname, force_O_LARGEFILE(flags), 0); 93} 94