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 36 extern "C" int __openat(int, const char*, int, int); 37 38 static 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 46 int 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 51 int 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 = (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 65 int __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 73 int 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 = (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 87 int __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
