| /* |
| * 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 _UNISTD_H_ |
| #error "Never include this file directly; instead, include <unistd.h>" |
| #endif |
| |
| |
| #if __ANDROID_API__ >= 24 |
| char* __getcwd_chk(char*, size_t, size_t) __INTRODUCED_IN(24); |
| #endif /* __ANDROID_API__ >= 24 */ |
| |
| |
| |
| #if __ANDROID_API__ >= 23 |
| ssize_t __pread_chk(int, void*, size_t, off_t, size_t) __INTRODUCED_IN(23); |
| #endif /* __ANDROID_API__ >= 23 */ |
| |
| ssize_t __pread_real(int, void*, size_t, off_t) __RENAME(pread); |
| |
| |
| #if __ANDROID_API__ >= 23 |
| ssize_t __pread64_chk(int, void*, size_t, off64_t, size_t) __INTRODUCED_IN(23); |
| #endif /* __ANDROID_API__ >= 23 */ |
| |
| ssize_t __pread64_real(int, void*, size_t, off64_t) __RENAME(pread64); |
| |
| |
| #if __ANDROID_API__ >= 24 |
| ssize_t __pwrite_chk(int, const void*, size_t, off_t, size_t) __INTRODUCED_IN(24); |
| #endif /* __ANDROID_API__ >= 24 */ |
| |
| ssize_t __pwrite_real(int, const void*, size_t, off_t) __RENAME(pwrite); |
| |
| |
| #if __ANDROID_API__ >= 24 |
| ssize_t __pwrite64_chk(int, const void*, size_t, off64_t, size_t) __INTRODUCED_IN(24); |
| #endif /* __ANDROID_API__ >= 24 */ |
| |
| ssize_t __pwrite64_real(int, const void*, size_t, off64_t) __RENAME(pwrite64); |
| |
| |
| #if __ANDROID_API__ >= 21 |
| ssize_t __read_chk(int, void*, size_t, size_t) __INTRODUCED_IN(21); |
| #endif /* __ANDROID_API__ >= 21 */ |
| |
| |
| #if __ANDROID_API__ >= 24 |
| ssize_t __write_chk(int, const void*, size_t, size_t) __INTRODUCED_IN(24); |
| #endif /* __ANDROID_API__ >= 24 */ |
| |
| |
| #if __ANDROID_API__ >= 23 |
| ssize_t __readlink_chk(const char*, char*, size_t, size_t) __INTRODUCED_IN(23); |
| ssize_t __readlinkat_chk(int dirfd, const char*, char*, size_t, size_t) __INTRODUCED_IN(23); |
| #endif /* __ANDROID_API__ >= 23 */ |
| |
| |
| #if defined(__BIONIC_FORTIFY) |
| |
| #if defined(__USE_FILE_OFFSET64) |
| #define __PREAD_PREFIX(x) __pread64_ ## x |
| #define __PWRITE_PREFIX(x) __pwrite64_ ## x |
| #else |
| #define __PREAD_PREFIX(x) __pread_ ## x |
| #define __PWRITE_PREFIX(x) __pwrite_ ## x |
| #endif |
| |
| #define __error_if_overflows_ssizet(what, fn) \ |
| __clang_error_if((what) > SSIZE_MAX, "in call to '" #fn "', '" #what "' must be <= SSIZE_MAX") |
| |
| #define __error_if_overflows_objectsize(what, objsize, fn) \ |
| __clang_error_if(__bos_unevaluated_lt((objsize), (what)), \ |
| "in call to '" #fn "', '" #what "' bytes overflows the given object") |
| |
| #define __bos_trivially_ge_no_overflow(bos_val, index) \ |
| ((__bos_dynamic_check_impl_and((bos_val), >=, (index), (bos_val) <= SSIZE_MAX) && \ |
| __builtin_constant_p(index) && (index) <= SSIZE_MAX)) |
| |
| __BIONIC_FORTIFY_INLINE |
| char* getcwd(char* const __pass_object_size buf, size_t size) |
| __overloadable |
| __error_if_overflows_objectsize(size, __bos(buf), getcwd) { |
| #if __ANDROID_API__ >= __ANDROID_API_N__ |
| size_t bos = __bos(buf); |
| |
| if (!__bos_trivially_ge(bos, size)) { |
| return __getcwd_chk(buf, size, bos); |
| } |
| #endif /* __ANDROID_API__ >= __ANDROID_API_N__ */ |
| return __call_bypassing_fortify(getcwd)(buf, size); |
| } |
| |
| #if !defined(__USE_FILE_OFFSET64) |
| __BIONIC_FORTIFY_INLINE |
| ssize_t pread(int fd, void* const __pass_object_size0 buf, size_t count, off_t offset) |
| __overloadable |
| __error_if_overflows_ssizet(count, pread) |
| __error_if_overflows_objectsize(count, __bos0(buf), pread) { |
| #if __ANDROID_API__ >= __ANDROID_API_M__ |
| size_t bos = __bos0(buf); |
| |
| if (!__bos_trivially_ge_no_overflow(bos, count)) { |
| return __PREAD_PREFIX(chk)(fd, buf, count, offset, bos); |
| } |
| #endif /* __ANDROID_API__ >= __ANDROID_API_M__ */ |
| return __PREAD_PREFIX(real)(fd, buf, count, offset); |
| } |
| #endif /* !defined(__USE_FILE_OFFSET64) */ |
| |
| __BIONIC_FORTIFY_INLINE |
| ssize_t pread64(int fd, void* const __pass_object_size0 buf, size_t count, off64_t offset) |
| __overloadable |
| __error_if_overflows_ssizet(count, pread64) |
| __error_if_overflows_objectsize(count, __bos0(buf), pread64) { |
| #if __ANDROID_API__ >= __ANDROID_API_M__ |
| size_t bos = __bos0(buf); |
| |
| if (!__bos_trivially_ge_no_overflow(bos, count)) { |
| return __pread64_chk(fd, buf, count, offset, bos); |
| } |
| #endif /* __ANDROID_API__ >= __ANDROID_API_M__ */ |
| return __pread64_real(fd, buf, count, offset); |
| } |
| |
| #if !defined(__USE_FILE_OFFSET64) |
| __BIONIC_FORTIFY_INLINE |
| ssize_t pwrite(int fd, const void* const __pass_object_size0 buf, size_t count, off_t offset) |
| __overloadable |
| __error_if_overflows_ssizet(count, pwrite) |
| __error_if_overflows_objectsize(count, __bos0(buf), pwrite) { |
| #if __ANDROID_API__ >= __ANDROID_API_N__ |
| size_t bos = __bos0(buf); |
| |
| if (!__bos_trivially_ge_no_overflow(bos, count)) { |
| return __PWRITE_PREFIX(chk)(fd, buf, count, offset, bos); |
| } |
| #endif /* __ANDROID_API__ >= __ANDROID_API_N__ */ |
| return __PWRITE_PREFIX(real)(fd, buf, count, offset); |
| } |
| #endif /* !defined(__USE_FILE_OFFSET64) */ |
| |
| __BIONIC_FORTIFY_INLINE |
| ssize_t pwrite64(int fd, const void* const __pass_object_size0 buf, size_t count, off64_t offset) |
| __overloadable |
| __error_if_overflows_ssizet(count, pwrite64) |
| __error_if_overflows_objectsize(count, __bos0(buf), pwrite64) { |
| #if __ANDROID_API__ >= __ANDROID_API_N__ |
| size_t bos = __bos0(buf); |
| |
| if (!__bos_trivially_ge_no_overflow(bos, count)) { |
| return __pwrite64_chk(fd, buf, count, offset, bos); |
| } |
| #endif /* __ANDROID_API__ >= __ANDROID_API_N__ */ |
| return __pwrite64_real(fd, buf, count, offset); |
| } |
| |
| __BIONIC_FORTIFY_INLINE |
| ssize_t read(int fd, void* const __pass_object_size0 buf, size_t count) |
| __overloadable |
| __error_if_overflows_ssizet(count, read) |
| __error_if_overflows_objectsize(count, __bos0(buf), read) { |
| #if __ANDROID_API__ >= __ANDROID_API_L__ |
| size_t bos = __bos0(buf); |
| |
| if (!__bos_trivially_ge_no_overflow(bos, count)) { |
| return __read_chk(fd, buf, count, bos); |
| } |
| #endif /* __ANDROID_API__ >= __ANDROID_API_L__ */ |
| return __call_bypassing_fortify(read)(fd, buf, count); |
| } |
| |
| __BIONIC_FORTIFY_INLINE |
| ssize_t write(int fd, const void* const __pass_object_size0 buf, size_t count) |
| __overloadable |
| __error_if_overflows_ssizet(count, write) |
| __error_if_overflows_objectsize(count, __bos0(buf), write) { |
| #if __ANDROID_API__ >= __ANDROID_API_N__ |
| size_t bos = __bos0(buf); |
| |
| if (!__bos_trivially_ge_no_overflow(bos, count)) { |
| return __write_chk(fd, buf, count, bos); |
| } |
| #endif /* __ANDROID_API__ >= __ANDROID_API_N__ */ |
| return __call_bypassing_fortify(write)(fd, buf, count); |
| } |
| |
| __BIONIC_FORTIFY_INLINE |
| ssize_t readlink(const char* path, char* const __pass_object_size buf, size_t size) |
| __overloadable |
| __error_if_overflows_ssizet(size, readlink) |
| __error_if_overflows_objectsize(size, __bos(buf), readlink) { |
| #if __ANDROID_API__ >= __ANDROID_API_M__ |
| size_t bos = __bos(buf); |
| |
| if (!__bos_trivially_ge_no_overflow(bos, size)) { |
| return __readlink_chk(path, buf, size, bos); |
| } |
| #endif /* __ANDROID_API__ >= __ANDROID_API_M__ */ |
| return __call_bypassing_fortify(readlink)(path, buf, size); |
| } |
| |
| #if __ANDROID_API__ >= __ANDROID_API_L__ |
| __BIONIC_FORTIFY_INLINE |
| ssize_t readlinkat(int dirfd, const char* path, char* const __pass_object_size buf, size_t size) |
| __overloadable |
| __error_if_overflows_ssizet(size, readlinkat) |
| __error_if_overflows_objectsize(size, __bos(buf), readlinkat) { |
| #if __ANDROID_API__ >= __ANDROID_API_M__ |
| size_t bos = __bos(buf); |
| |
| if (!__bos_trivially_ge_no_overflow(bos, size)) { |
| return __readlinkat_chk(dirfd, path, buf, size, bos); |
| } |
| #endif /* __ANDROID_API__ >= __ANDROID_API_M__ */ |
| return __call_bypassing_fortify(readlinkat)(dirfd, path, buf, size); |
| } |
| #endif /* __ANDROID_API__ >= __ANDROID_API_L__ */ |
| |
| #undef __bos_trivially_ge_no_overflow |
| #undef __enable_if_no_overflow_ssizet |
| #undef __error_if_overflows_objectsize |
| #undef __error_if_overflows_ssizet |
| #undef __PREAD_PREFIX |
| #undef __PWRITE_PREFIX |
| #endif /* defined(__BIONIC_FORTIFY) */ |