658727e111
__open_2() is used by the fortify implementation of open(2) in fcntl.h, and as such needs an unmangled C name. For some reason (inlining?), this doesn't cause problems at the default optimization level, but does for -O0. The rest of these didn't cause build failures, but they look suspect and probably will, we just haven't caught them yet. Bug: 17784968 Change-Id: I7391a7a8999ee204eaf6abd14a3d5373ea419d5b
134 lines
4.5 KiB
C
134 lines
4.5 KiB
C
/*
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* Copyright (C) 2008 The Android Open Source Project
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* All rights reserved.
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*
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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
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _FCNTL_H
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#define _FCNTL_H
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <linux/fadvise.h>
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#include <linux/fcntl.h>
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#include <linux/uio.h>
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#include <unistd.h> /* this is not required, but makes client code much happier */
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__BEGIN_DECLS
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#ifdef __LP64__
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/* LP64 kernels don't have F_*64 defines because their flock is 64-bit. */
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#define F_GETLK64 F_GETLK
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#define F_SETLK64 F_SETLK
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#define F_SETLKW64 F_SETLKW
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#endif
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#define O_ASYNC FASYNC
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#define O_RSYNC O_SYNC
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#define SPLICE_F_MOVE 1
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#define SPLICE_F_NONBLOCK 2
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#define SPLICE_F_MORE 4
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#define SPLICE_F_GIFT 8
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#define SYNC_FILE_RANGE_WAIT_BEFORE 1
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#define SYNC_FILE_RANGE_WRITE 2
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#define SYNC_FILE_RANGE_WAIT_AFTER 4
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extern int creat(const char*, mode_t);
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extern int creat64(const char*, mode_t);
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extern int fallocate64(int, int, off64_t, off64_t);
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extern int fallocate(int, int, off_t, off_t);
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extern int fcntl(int, int, ...);
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extern int openat(int, const char*, int, ...);
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extern int openat64(int, const char*, int, ...);
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extern int open(const char*, int, ...);
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extern int open64(const char*, int, ...);
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extern int posix_fadvise64(int, off64_t, off64_t, int);
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extern int posix_fadvise(int, off_t, off_t, int);
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extern int posix_fallocate64(int, off64_t, off64_t);
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extern int posix_fallocate(int, off_t, off_t);
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extern ssize_t splice(int, off64_t*, int, off64_t*, size_t, unsigned int);
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extern ssize_t tee(int, int, size_t, unsigned int);
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extern int unlinkat(int, const char*, int);
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extern ssize_t vmsplice(int, const struct iovec*, size_t, unsigned int);
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extern int __open_2(const char*, int);
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extern int __open_real(const char*, int, ...) __RENAME(open);
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extern int __openat_2(int, const char*, int);
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extern int __openat_real(int, const char*, int, ...) __RENAME(openat);
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__errordecl(__creat_missing_mode, "called with O_CREAT, but missing mode");
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__errordecl(__creat_too_many_args, "too many arguments");
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#if defined(__BIONIC_FORTIFY)
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#if !defined(__clang__)
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__BIONIC_FORTIFY_INLINE
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int open(const char* pathname, int flags, ...) {
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if (__builtin_constant_p(flags)) {
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if ((flags & O_CREAT) && __builtin_va_arg_pack_len() == 0) {
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__creat_missing_mode(); // compile time error
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}
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}
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if (__builtin_va_arg_pack_len() > 1) {
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__creat_too_many_args(); // compile time error
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}
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if ((__builtin_va_arg_pack_len() == 0) && !__builtin_constant_p(flags)) {
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return __open_2(pathname, flags);
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}
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return __open_real(pathname, flags, __builtin_va_arg_pack());
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}
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__BIONIC_FORTIFY_INLINE
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int openat(int dirfd, const char* pathname, int flags, ...) {
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if (__builtin_constant_p(flags)) {
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if ((flags & O_CREAT) && __builtin_va_arg_pack_len() == 0) {
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__creat_missing_mode(); // compile time error
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}
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}
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if (__builtin_va_arg_pack_len() > 1) {
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__creat_too_many_args(); // compile time error
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}
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if ((__builtin_va_arg_pack_len() == 0) && !__builtin_constant_p(flags)) {
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return __openat_2(dirfd, pathname, flags);
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}
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return __openat_real(dirfd, pathname, flags, __builtin_va_arg_pack());
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}
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#endif /* !defined(__clang__) */
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#endif /* defined(__BIONIC_FORTIFY) */
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__END_DECLS
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#endif /* _FCNTL_H */
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