829c089f83
Clang and _FORTIFY_SOURCE are just plain incompatible with each other. First of all, clang doesn't understand the __attribute__((gnu_inline)) header. Second of all, Clang doesn't have support for __builtin_va_arg_pack() and __builtin_va_arg_pack_len() (see http://clang.llvm.org/docs/UsersManual.html#c_unimpl_gcc) Until we can resolve these issues, don't even try using _FORTIFY_SOURCE under clang. Change-Id: I81c2b8073bb3276fa9a4a6b93c427b641038356a
108 lines
3.7 KiB
C
108 lines
3.7 KiB
C
/*
|
|
* Copyright (C) 2008 The Android Open Source Project
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
|
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
#ifndef _FCNTL_H
|
|
#define _FCNTL_H
|
|
|
|
#include <sys/cdefs.h>
|
|
#include <sys/types.h>
|
|
#include <linux/fcntl.h>
|
|
#include <unistd.h> /* this is not required, but makes client code much happier */
|
|
|
|
__BEGIN_DECLS
|
|
|
|
#ifndef O_ASYNC
|
|
#define O_ASYNC FASYNC
|
|
#endif
|
|
|
|
#ifndef O_CLOEXEC
|
|
#define O_CLOEXEC 02000000
|
|
#endif
|
|
|
|
extern int open(const char* path, int mode, ...);
|
|
extern int openat(int fd, const char* path, int mode, ...);
|
|
extern int unlinkat(int dirfd, const char *pathname, int flags);
|
|
extern int fcntl(int fd, int command, ...);
|
|
extern int creat(const char* path, mode_t mode);
|
|
|
|
#if defined(__BIONIC_FORTIFY_INLINE)
|
|
|
|
extern void __creat_error()
|
|
__attribute__((__error__ ("called with O_CREAT, but missing mode")));
|
|
extern void __too_many_args_error()
|
|
__attribute__((__error__ ("too many arguments")));
|
|
extern int __open_real(const char *pathname, int flags, ...)
|
|
__asm__(__USER_LABEL_PREFIX__ "open");
|
|
extern int __open_2(const char *, int);
|
|
|
|
__BIONIC_FORTIFY_INLINE
|
|
int open(const char *pathname, int flags, ...) {
|
|
if (__builtin_constant_p(flags)) {
|
|
if ((flags & O_CREAT) && __builtin_va_arg_pack_len() == 0) {
|
|
__creat_error(); // compile time error
|
|
}
|
|
}
|
|
|
|
if (__builtin_va_arg_pack_len() > 1) {
|
|
__too_many_args_error(); // compile time error
|
|
}
|
|
|
|
if ((__builtin_va_arg_pack_len() == 0) && !__builtin_constant_p(flags)) {
|
|
return __open_2(pathname, flags);
|
|
}
|
|
|
|
return __open_real(pathname, flags, __builtin_va_arg_pack());
|
|
}
|
|
|
|
extern int __openat_2(int, const char *, int);
|
|
extern int __openat_real(int dirfd, const char *pathname, int flags, ...)
|
|
__asm__(__USER_LABEL_PREFIX__ "openat");
|
|
|
|
__BIONIC_FORTIFY_INLINE
|
|
int openat(int dirfd, const char *pathname, int flags, ...) {
|
|
if (__builtin_constant_p(flags)) {
|
|
if ((flags & O_CREAT) && __builtin_va_arg_pack_len() == 0) {
|
|
__creat_error(); // compile time error
|
|
}
|
|
}
|
|
|
|
if (__builtin_va_arg_pack_len() > 1) {
|
|
__too_many_args_error(); // compile time error
|
|
}
|
|
|
|
if ((__builtin_va_arg_pack_len() == 0) && !__builtin_constant_p(flags)) {
|
|
return __openat_2(dirfd, pathname, flags);
|
|
}
|
|
|
|
return __openat_real(dirfd, pathname, flags, __builtin_va_arg_pack());
|
|
}
|
|
|
|
#endif /* defined(__BIONIC_FORTIFY_INLINE) */
|
|
|
|
__END_DECLS
|
|
|
|
#endif /* _FCNTL_H */
|