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
force_O_LARGEFILE(int flags)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
creat(const char * pathname,mode_t mode)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
open(const char * pathname,int flags,...)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
__open_2(const char * pathname,int flags)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
openat(int fd,const char * pathname,int flags,...)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
__openat_2(int fd,const char * pathname,int flags)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