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/*
* 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 _UNISTD_H_
#define _UNISTD_H_
#include <stddef.h>
#include <sys/cdefs.h>
#include <sys/types.h>
#include <sys/select.h>
#include <sys/sysconf.h>
#include <bits/fcntl.h>
#include <bits/ioctl.h>
#include <bits/lockf.h>
#include <bits/posix_limits.h>
__BEGIN_DECLS
#define STDIN_FILENO 0
#define STDOUT_FILENO 1
#define STDERR_FILENO 2
#define F_OK 0
#define X_OK 1
#define W_OK 2
#define R_OK 4
#define SEEK_SET 0
#define SEEK_CUR 1
#define SEEK_END 2
#define _PC_FILESIZEBITS 0
#define _PC_LINK_MAX 1
#define _PC_MAX_CANON 2
#define _PC_MAX_INPUT 3
#define _PC_NAME_MAX 4
#define _PC_PATH_MAX 5
#define _PC_PIPE_BUF 6
#define _PC_2_SYMLINKS 7
#define _PC_ALLOC_SIZE_MIN 8
#define _PC_REC_INCR_XFER_SIZE 9
#define _PC_REC_MAX_XFER_SIZE 10
#define _PC_REC_MIN_XFER_SIZE 11
#define _PC_REC_XFER_ALIGN 12
#define _PC_SYMLINK_MAX 13
#define _PC_CHOWN_RESTRICTED 14
#define _PC_NO_TRUNC 15
#define _PC_VDISABLE 16
#define _PC_ASYNC_IO 17
#define _PC_PRIO_IO 18
#define _PC_SYNC_IO 19
extern char** environ;
extern __noreturn void _exit(int __status);
extern pid_t fork(void);
extern pid_t vfork(void);
extern pid_t getpid(void);
extern pid_t gettid(void) __pure2;
extern pid_t getpgid(pid_t __pid);
extern int setpgid(pid_t __pid, pid_t __pgid);
extern pid_t getppid(void);
extern pid_t getpgrp(void);
extern int setpgrp(void);
extern pid_t getsid(pid_t __pid) __INTRODUCED_IN(21);
extern pid_t setsid(void);
extern int execv(const char* __path, char* const* __argv);
extern int execvp(const char* __file, char* const* __argv);
extern int execvpe(const char* __file, char* const* __argv, char* const* __envp)
__INTRODUCED_IN(21);
extern int execve(const char* __file, char* const* __argv, char* const* __envp);
extern int execl(const char* __path, const char* __arg0, ...);
extern int execlp(const char* __file, const char* __arg0, ...);
extern int execle(const char* __path, const char* __arg0, ...);
extern int nice(int __incr);
extern int setuid(uid_t __uid);
extern uid_t getuid(void);
extern int seteuid(uid_t __uid);
extern uid_t geteuid(void);
extern int setgid(gid_t __gid);
extern gid_t getgid(void);
extern int setegid(gid_t __gid);
extern gid_t getegid(void);
extern int getgroups(int __size, gid_t* __list);
extern int setgroups(size_t __size, const gid_t* __list);
extern int setreuid(uid_t __ruid, uid_t __euid);
extern int setregid(gid_t __rgid, gid_t __egid);
extern int setresuid(uid_t __ruid, uid_t __euid, uid_t __suid);
extern int setresgid(gid_t __rgid, gid_t __egid, gid_t __sgid);
extern int getresuid(uid_t* __ruid, uid_t* __euid, uid_t* __suid);
extern int getresgid(gid_t* __rgid, gid_t* __egid, gid_t* __sgid);
extern char* getlogin(void);
extern long fpathconf(int __fd, int __name);
extern long pathconf(const char* __path, int __name);
extern int access(const char* __path, int __mode);
extern int faccessat(int __dirfd, const char* __path, int __mode, int __flags)
__INTRODUCED_IN(21);
extern int link(const char* __oldpath, const char* __newpath);
extern int linkat(int __olddirfd, const char* __oldpath, int __newdirfd,
const char* __newpath, int __flags) __INTRODUCED_IN(21);
extern int unlink(const char* __path);
extern int unlinkat(int __dirfd, const char* __path, int __flags);
extern int chdir(const char* __path);
extern int fchdir(int __fd);
extern int rmdir(const char* __path);
extern int pipe(int* __pipefd);
#if defined(__USE_GNU)
extern int pipe2(int* __pipefd, int __flags) __INTRODUCED_IN(9);
#endif
extern int chroot(const char* __path);
extern int symlink(const char* __oldpath, const char* __newpath);
extern int symlinkat(const char* __oldpath, int __newdirfd,
const char* __newpath) __INTRODUCED_IN(21);
extern ssize_t readlink(const char* __path, char* __buf, size_t __bufsiz);
extern ssize_t readlinkat(int __dirfd, const char* __path, char* __buf,
size_t __bufsiz) __INTRODUCED_IN(21);
extern int chown(const char* __path, uid_t __owner, gid_t __group);
extern int fchown(int __fd, uid_t __owner, gid_t __group);
extern int fchownat(int __dirfd, const char* __path, uid_t __owner,
gid_t __group, int __flags);
extern int lchown(const char* __path, uid_t __owner, gid_t __group);
extern char* getcwd(char* __buf, size_t __size);
extern int sync(void);
extern int close(int __fd);
extern ssize_t read(int __fd, void* __buf, size_t __count);
extern ssize_t write(int __fd, const void* __buf, size_t __count);
extern int dup(int __oldfd);
extern int dup2(int __oldfd, int __newfd);
extern int dup3(int __oldfd, int __newfd, int __flags) __INTRODUCED_IN(21);
extern int fsync(int __fd);
extern int fdatasync(int __fd) __INTRODUCED_IN(9);
#if defined(__USE_FILE_OFFSET64)
extern off_t lseek(int __fd, off_t __offset, int __whence) __RENAME(lseek64);
#else
extern off_t lseek(int __fd, off_t __offset, int __whence);
#endif
extern off64_t lseek64(int __fd, off64_t __offset, int __whence);
#if defined(__USE_FILE_OFFSET64) && __ANDROID_API__ >= 21
extern int truncate(const char* __path, off_t __length) __RENAME(truncate64);
extern ssize_t pread(int __fd, void* __buf, size_t __count, off_t __offset)
__RENAME(pread64);
extern ssize_t pwrite(int __fd, const void* __buf, size_t __count,
off_t __offset) __RENAME(pwrite64);
extern int ftruncate(int __fd, off_t __length) __RENAME(ftruncate64);
#else
extern int truncate(const char* __path, off_t __length);
extern ssize_t pread(int __fd, void* __buf, size_t __count, off_t __offset);
extern ssize_t pwrite(int __fd, const void* __buf, size_t __count,
off_t __offset);
extern int ftruncate(int __fd, off_t __length);
#endif
extern int truncate64(const char* __path, off64_t __length) __INTRODUCED_IN(21);
extern ssize_t pread64(int __fd, void* __buf, size_t __count, off64_t __offset) __INTRODUCED_IN(21);
extern ssize_t pwrite64(int __fd, const void* __buf, size_t __count,
off64_t __offset) __INTRODUCED_IN(21);
extern int ftruncate64(int __fd, off64_t __length) __INTRODUCED_IN(21);
extern int pause(void);
extern unsigned int alarm(unsigned int __seconds);
extern unsigned int sleep(unsigned int __seconds);
extern int usleep(useconds_t __usec);
int gethostname(char* __name, size_t __len);
int sethostname(const char* __name, size_t __len);
extern void* __brk(void* __addr);
extern int brk(void* __addr);
extern void* sbrk(ptrdiff_t __increment);
extern int getopt(int __argc, char* const* __argv, const char* __argstring);
extern char* optarg;
extern int optind, opterr, optopt;
extern int isatty(int __fd);
extern char* ttyname(int __fd);
extern int ttyname_r(int __fd, char* __buf, size_t __buflen) __INTRODUCED_IN(8);
extern int acct(const char* __filepath);
long sysconf(int __name);
#if __ANDROID_API__ >= 21
int getpagesize(void);
#else
__inline__ int getpagesize(void) {
return sysconf(_SC_PAGESIZE);
}
#endif
long syscall(long __number, ...);
extern int daemon(int __nochdir, int __noclose);
#if defined(__arm__) || (defined(__mips__) && !defined(__LP64__))
extern int cacheflush(long __addr, long __nbytes, long __cache);
/* __attribute__((deprecated("use __builtin___clear_cache instead"))); */
#endif
extern pid_t tcgetpgrp(int __fd);
extern int tcsetpgrp(int __fd, pid_t __pid);
/* Used to retry syscalls that can return EINTR. */
#define TEMP_FAILURE_RETRY(exp) ({ \
__typeof__(exp) _rc; \
do { \
_rc = (exp); \
} while (_rc == -1 && errno == EINTR); \
_rc; })
/* TODO(unified-headers): Factor out all the FORTIFY features. */
extern char* __getcwd_chk(char*, size_t, size_t);
__errordecl(__getcwd_dest_size_error, "getcwd called with size bigger than destination");
extern char* __getcwd_real(char*, size_t) __RENAME(getcwd);
extern ssize_t __pread_chk(int, void*, size_t, off_t, size_t);
__errordecl(__pread_dest_size_error, "pread called with size bigger than destination");
__errordecl(__pread_count_toobig_error, "pread called with count > SSIZE_MAX");
extern ssize_t __pread_real(int, void*, size_t, off_t) __RENAME(pread);
extern ssize_t __pread64_chk(int, void*, size_t, off64_t, size_t);
__errordecl(__pread64_dest_size_error, "pread64 called with size bigger than destination");
__errordecl(__pread64_count_toobig_error, "pread64 called with count > SSIZE_MAX");
extern ssize_t __pread64_real(int, void*, size_t, off64_t) __RENAME(pread64);
extern ssize_t __pwrite_chk(int, const void*, size_t, off_t, size_t);
__errordecl(__pwrite_dest_size_error, "pwrite called with size bigger than destination");
__errordecl(__pwrite_count_toobig_error, "pwrite called with count > SSIZE_MAX");
extern ssize_t __pwrite_real(int, const void*, size_t, off_t) __RENAME(pwrite);
extern ssize_t __pwrite64_chk(int, const void*, size_t, off64_t, size_t);
__errordecl(__pwrite64_dest_size_error, "pwrite64 called with size bigger than destination");
__errordecl(__pwrite64_count_toobig_error, "pwrite64 called with count > SSIZE_MAX");
extern ssize_t __pwrite64_real(int, const void*, size_t, off64_t) __RENAME(pwrite64);
extern ssize_t __read_chk(int, void*, size_t, size_t);
__errordecl(__read_dest_size_error, "read called with size bigger than destination");
__errordecl(__read_count_toobig_error, "read called with count > SSIZE_MAX");
extern ssize_t __read_real(int, void*, size_t) __RENAME(read);
extern ssize_t __write_chk(int, const void*, size_t, size_t);
__errordecl(__write_dest_size_error, "write called with size bigger than destination");
__errordecl(__write_count_toobig_error, "write called with count > SSIZE_MAX");
extern ssize_t __write_real(int, const void*, size_t) __RENAME(write);
extern ssize_t __readlink_chk(const char*, char*, size_t, size_t);
__errordecl(__readlink_dest_size_error, "readlink called with size bigger than destination");
__errordecl(__readlink_size_toobig_error, "readlink called with size > SSIZE_MAX");
extern ssize_t __readlink_real(const char*, char*, size_t) __RENAME(readlink);
extern ssize_t __readlinkat_chk(int dirfd, const char*, char*, size_t, size_t);
__errordecl(__readlinkat_dest_size_error, "readlinkat called with size bigger than destination");
__errordecl(__readlinkat_size_toobig_error, "readlinkat called with size > SSIZE_MAX");
extern ssize_t __readlinkat_real(int dirfd, const char*, char*, size_t) __RENAME(readlinkat);
extern int getdomainname(char*, size_t);
extern int setdomainname(const char*, size_t);
#if defined(__BIONIC_FORTIFY)
__BIONIC_FORTIFY_INLINE
char* getcwd(char* buf, size_t size) {
size_t bos = __bos(buf);
#if defined(__clang__)
/*
* Work around LLVM's incorrect __builtin_object_size implementation here
* to avoid needing the workaround in the __getcwd_chk ABI forever.
*
* https://llvm.org/bugs/show_bug.cgi?id=23277
*/
if (buf == NULL) {
bos = __BIONIC_FORTIFY_UNKNOWN_SIZE;
}
#else
if (bos == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
return __getcwd_real(buf, size);
}
if (__builtin_constant_p(size) && (size > bos)) {
__getcwd_dest_size_error();
}
if (__builtin_constant_p(size) && (size <= bos)) {
return __getcwd_real(buf, size);
}
#endif
return __getcwd_chk(buf, size, bos);
}
#if defined(__USE_FILE_OFFSET64)
#define __PREAD_PREFIX(x) __pread64_ ## x
#else
#define __PREAD_PREFIX(x) __pread_ ## x
#endif
__BIONIC_FORTIFY_INLINE
ssize_t pread(int fd, void* buf, size_t count, off_t offset) {
size_t bos = __bos0(buf);
#if !defined(__clang__)
if (__builtin_constant_p(count) && (count > SSIZE_MAX)) {
__PREAD_PREFIX(count_toobig_error)();
}
if (bos == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
return __PREAD_PREFIX(real)(fd, buf, count, offset);
}
if (__builtin_constant_p(count) && (count > bos)) {
__PREAD_PREFIX(dest_size_error)();
}
if (__builtin_constant_p(count) && (count <= bos)) {
return __PREAD_PREFIX(real)(fd, buf, count, offset);
}
#endif
return __PREAD_PREFIX(chk)(fd, buf, count, offset, bos);
}
__BIONIC_FORTIFY_INLINE
ssize_t pread64(int fd, void* buf, size_t count, off64_t offset) {
size_t bos = __bos0(buf);
#if !defined(__clang__)
if (__builtin_constant_p(count) && (count > SSIZE_MAX)) {
__pread64_count_toobig_error();
}
if (bos == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
return __pread64_real(fd, buf, count, offset);
}
if (__builtin_constant_p(count) && (count > bos)) {
__pread64_dest_size_error();
}
if (__builtin_constant_p(count) && (count <= bos)) {
return __pread64_real(fd, buf, count, offset);
}
#endif
return __pread64_chk(fd, buf, count, offset, bos);
}
#if defined(__USE_FILE_OFFSET64)
#define __PWRITE_PREFIX(x) __pwrite64_ ## x
#else
#define __PWRITE_PREFIX(x) __pwrite_ ## x
#endif
__BIONIC_FORTIFY_INLINE
ssize_t pwrite(int fd, const void* buf, size_t count, off_t offset) {
size_t bos = __bos0(buf);
#if !defined(__clang__)
if (__builtin_constant_p(count) && (count > SSIZE_MAX)) {
__PWRITE_PREFIX(count_toobig_error)();
}
if (bos == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
return __PWRITE_PREFIX(real)(fd, buf, count, offset);
}
if (__builtin_constant_p(count) && (count > bos)) {
__PWRITE_PREFIX(dest_size_error)();
}
if (__builtin_constant_p(count) && (count <= bos)) {
return __PWRITE_PREFIX(real)(fd, buf, count, offset);
}
#endif
return __PWRITE_PREFIX(chk)(fd, buf, count, offset, bos);
}
__BIONIC_FORTIFY_INLINE
ssize_t pwrite64(int fd, const void* buf, size_t count, off64_t offset) {
size_t bos = __bos0(buf);
#if !defined(__clang__)
if (__builtin_constant_p(count) && (count > SSIZE_MAX)) {
__pwrite64_count_toobig_error();
}
if (bos == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
return __pwrite64_real(fd, buf, count, offset);
}
if (__builtin_constant_p(count) && (count > bos)) {
__pwrite64_dest_size_error();
}
if (__builtin_constant_p(count) && (count <= bos)) {
return __pwrite64_real(fd, buf, count, offset);
}
#endif
return __pwrite64_chk(fd, buf, count, offset, bos);
}
__BIONIC_FORTIFY_INLINE
ssize_t read(int fd, void* buf, size_t count) {
size_t bos = __bos0(buf);
#if !defined(__clang__)
if (__builtin_constant_p(count) && (count > SSIZE_MAX)) {
__read_count_toobig_error();
}
if (bos == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
return __read_real(fd, buf, count);
}
if (__builtin_constant_p(count) && (count > bos)) {
__read_dest_size_error();
}
if (__builtin_constant_p(count) && (count <= bos)) {
return __read_real(fd, buf, count);
}
#endif
return __read_chk(fd, buf, count, bos);
}
__BIONIC_FORTIFY_INLINE
ssize_t write(int fd, const void* buf, size_t count) {
size_t bos = __bos0(buf);
#if !defined(__clang__)
#if 0 /* work around a false positive due to a missed optimization */
if (__builtin_constant_p(count) && (count > SSIZE_MAX)) {
__write_count_toobig_error();
}
#endif
if (bos == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
return __write_real(fd, buf, count);
}
if (__builtin_constant_p(count) && (count > bos)) {
__write_dest_size_error();
}
if (__builtin_constant_p(count) && (count <= bos)) {
return __write_real(fd, buf, count);
}
#endif
return __write_chk(fd, buf, count, bos);
}
__BIONIC_FORTIFY_INLINE
ssize_t readlink(const char* path, char* buf, size_t size) {
size_t bos = __bos(buf);
#if !defined(__clang__)
if (__builtin_constant_p(size) && (size > SSIZE_MAX)) {
__readlink_size_toobig_error();
}
if (bos == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
return __readlink_real(path, buf, size);
}
if (__builtin_constant_p(size) && (size > bos)) {
__readlink_dest_size_error();
}
if (__builtin_constant_p(size) && (size <= bos)) {
return __readlink_real(path, buf, size);
}
#endif
return __readlink_chk(path, buf, size, bos);
}
__BIONIC_FORTIFY_INLINE
ssize_t readlinkat(int dirfd, const char* path, char* buf, size_t size) {
size_t bos = __bos(buf);
#if !defined(__clang__)
if (__builtin_constant_p(size) && (size > SSIZE_MAX)) {
__readlinkat_size_toobig_error();
}
if (bos == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
return __readlinkat_real(dirfd, path, buf, size);
}
if (__builtin_constant_p(size) && (size > bos)) {
__readlinkat_dest_size_error();
}
if (__builtin_constant_p(size) && (size <= bos)) {
return __readlinkat_real(dirfd, path, buf, size);
}
#endif
return __readlinkat_chk(dirfd, path, buf, size, bos);
}
#endif /* defined(__BIONIC_FORTIFY) */
__END_DECLS
#endif /* _UNISTD_H_ */