| /* |
| * Copyright (C) 2017 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 |
| #error "Never include this file directly; instead, include <fcntl.h>" |
| #endif |
| |
| |
| #if __ANDROID_API__ >= 17 |
| int __open_2(const char*, int) __INTRODUCED_IN(17); |
| int __openat_2(int, const char*, int) __INTRODUCED_IN(17); |
| #endif /* __ANDROID_API__ >= 17 */ |
| |
| /* |
| * These are the easiest way to call the real open even in clang FORTIFY. |
| */ |
| int __open_real(const char*, int, ...) __RENAME(open); |
| int __openat_real(int, const char*, int, ...) __RENAME(openat); |
| |
| #if defined(__BIONIC_FORTIFY) |
| #define __open_too_many_args_error "too many arguments" |
| #define __open_too_few_args_error "called with O_CREAT or O_TMPFILE, but missing mode" |
| #define __open_useless_modes_warning "has superfluous mode bits; missing O_CREAT?" |
| /* O_TMPFILE shares bits with O_DIRECTORY. */ |
| #define __open_modes_useful(flags) (((flags) & O_CREAT) || ((flags) & O_TMPFILE) == O_TMPFILE) |
| |
| __BIONIC_ERROR_FUNCTION_VISIBILITY |
| int open(const char* pathname, int flags, mode_t modes, ...) __overloadable |
| __errorattr(__open_too_many_args_error); |
| |
| /* |
| * pass_object_size serves two purposes here, neither of which involve __bos: it |
| * disqualifies this function from having its address taken (so &open works), |
| * and it makes overload resolution prefer open(const char *, int) over |
| * open(const char *, int, ...). |
| */ |
| __BIONIC_FORTIFY_INLINE |
| int open(const char* const __pass_object_size pathname, int flags) |
| __overloadable |
| __clang_error_if(__open_modes_useful(flags), "'open' " __open_too_few_args_error) { |
| #if __ANDROID_API__ >= __ANDROID_API_J_MR1__ |
| return __open_2(pathname, flags); |
| #else |
| return __open_real(pathname, flags); |
| #endif /* __ANDROID_API__ >= __ANDROID_API_J_MR1__ */ |
| } |
| |
| __BIONIC_FORTIFY_INLINE |
| int open(const char* const __pass_object_size pathname, int flags, mode_t modes) |
| __overloadable |
| __clang_warning_if(!__open_modes_useful(flags) && modes, |
| "'open' " __open_useless_modes_warning) { |
| return __open_real(pathname, flags, modes); |
| } |
| |
| __BIONIC_ERROR_FUNCTION_VISIBILITY |
| int openat(int dirfd, const char* pathname, int flags, mode_t modes, ...) |
| __overloadable |
| __errorattr(__open_too_many_args_error); |
| |
| __BIONIC_FORTIFY_INLINE |
| int openat(int dirfd, const char* const __pass_object_size pathname, int flags) |
| __overloadable |
| __clang_error_if(__open_modes_useful(flags), "'openat' " __open_too_few_args_error) { |
| #if __ANDROID_API__ >= __ANDROID_API_J_MR1__ |
| return __openat_2(dirfd, pathname, flags); |
| #else |
| return __openat_real(dirfd, pathname, flags); |
| #endif /* __ANDROID_API__ >= __ANDROID_API_J_MR1__ */ |
| } |
| |
| __BIONIC_FORTIFY_INLINE |
| int openat(int dirfd, const char* const __pass_object_size pathname, int flags, mode_t modes) |
| __overloadable |
| __clang_warning_if(!__open_modes_useful(flags) && modes, |
| "'openat' " __open_useless_modes_warning) { |
| return __openat_real(dirfd, pathname, flags, modes); |
| } |
| |
| #if __ANDROID_API__ >= __ANDROID_API_L__ |
| /* Note that open == open64, so we reuse those bits in the open64 variants below. */ |
| |
| __BIONIC_ERROR_FUNCTION_VISIBILITY |
| int open64(const char* pathname, int flags, mode_t modes, ...) __overloadable |
| __errorattr(__open_too_many_args_error); |
| |
| __BIONIC_FORTIFY_INLINE |
| int open64(const char* const __pass_object_size pathname, int flags) |
| __overloadable |
| __clang_error_if(__open_modes_useful(flags), "'open64' " __open_too_few_args_error) { |
| return __open_2(pathname, flags); |
| } |
| |
| __BIONIC_FORTIFY_INLINE |
| int open64(const char* const __pass_object_size pathname, int flags, mode_t modes) |
| __overloadable |
| __clang_warning_if(!__open_modes_useful(flags) && modes, |
| "'open64' " __open_useless_modes_warning) { |
| return __open_real(pathname, flags, modes); |
| } |
| |
| __BIONIC_ERROR_FUNCTION_VISIBILITY |
| int openat64(int dirfd, const char* pathname, int flags, mode_t modes, ...) |
| __overloadable |
| __errorattr(__open_too_many_args_error); |
| |
| __BIONIC_FORTIFY_INLINE |
| int openat64(int dirfd, const char* const __pass_object_size pathname, int flags) |
| __overloadable |
| __clang_error_if(__open_modes_useful(flags), "'openat64' " __open_too_few_args_error) { |
| return __openat_2(dirfd, pathname, flags); |
| } |
| |
| __BIONIC_FORTIFY_INLINE |
| int openat64(int dirfd, const char* const __pass_object_size pathname, int flags, mode_t modes) |
| __overloadable |
| __clang_warning_if(!__open_modes_useful(flags) && modes, |
| "'openat64' " __open_useless_modes_warning) { |
| return __openat_real(dirfd, pathname, flags, modes); |
| } |
| #endif /* __ANDROID_API__ >= __ANDROID_API_L__ */ |
| |
| #undef __open_too_many_args_error |
| #undef __open_too_few_args_error |
| #undef __open_useless_modes_warning |
| #undef __open_modes_useful |
| #endif /* defined(__BIONIC_FORTIFY) */ |