/* * 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 #include #include #include #include #include __BEGIN_DECLS /* Standard file descriptor numbers. */ #define STDIN_FILENO 0 #define STDOUT_FILENO 1 #define STDERR_FILENO 2 /* Values for whence in fseek and lseek */ #define SEEK_SET 0 #define SEEK_CUR 1 #define SEEK_END 2 extern char** environ; extern __noreturn void _exit(int); 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); extern int setpgid(pid_t, pid_t); extern pid_t getppid(void); extern pid_t getpgrp(void); extern int setpgrp(void); extern pid_t getsid(pid_t); extern pid_t setsid(void); extern int execv(const char *, char * const *); extern int execvp(const char *, char * const *); extern int execvpe(const char *, char * const *, char * const *); extern int execve(const char *, char * const *, char * const *); extern int execl(const char *, const char *, ...); extern int execlp(const char *, const char *, ...); extern int execle(const char *, const char *, ...); /* IMPORTANT: See comment under about this declaration */ extern int prctl(int option, ...); extern int nice(int); extern int setuid(uid_t); extern uid_t getuid(void); extern int seteuid(uid_t); extern uid_t geteuid(void); extern int setgid(gid_t); extern gid_t getgid(void); extern int setegid(gid_t); extern gid_t getegid(void); extern int getgroups(int, gid_t *); extern int setgroups(size_t, const gid_t *); extern int setreuid(uid_t, uid_t); extern int setregid(gid_t, gid_t); extern int setresuid(uid_t, uid_t, uid_t); extern int setresgid(gid_t, gid_t, gid_t); 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 char* getusershell(void); extern void setusershell(void); extern void endusershell(void); /* Macros for access() */ #define R_OK 4 /* Read */ #define W_OK 2 /* Write */ #define X_OK 1 /* Execute */ #define F_OK 0 /* Existence */ extern int access(const char*, int); extern int faccessat(int, const char*, int, int); extern int link(const char*, const char*); extern int linkat(int, const char*, int, const char*, int); extern int unlink(const char*); extern int unlinkat(int, const char*, int); extern int chdir(const char *); extern int fchdir(int); extern int rmdir(const char *); extern int pipe(int *); #ifdef _GNU_SOURCE extern int pipe2(int *, int); #endif extern int chroot(const char *); extern int symlink(const char*, const char*); extern int symlinkat(const char*, int, const char*); extern ssize_t readlink(const char*, char*, size_t); extern ssize_t readlinkat(int, const char*, char*, size_t); extern int chown(const char *, uid_t, gid_t); extern int fchown(int, uid_t, gid_t); extern int fchownat(int, const char*, uid_t, gid_t, int); extern int lchown(const char *, uid_t, gid_t); extern int truncate(const char *, off_t); extern int truncate64(const char *, off64_t); extern char *getcwd(char *, size_t); extern int sync(void); extern int close(int); extern off_t lseek(int, off_t, int); extern off64_t lseek64(int, off64_t, int); extern ssize_t read(int, void *, size_t); extern ssize_t write(int, const void *, size_t); extern ssize_t pread(int, void *, size_t, off_t); extern ssize_t pread64(int, void *, size_t, off64_t); extern ssize_t pwrite(int, const void *, size_t, off_t); extern ssize_t pwrite64(int, const void *, size_t, off64_t); extern int dup(int); extern int dup2(int, int); #ifdef _GNU_SOURCE extern int dup3(int, int, int); #endif extern int fcntl(int, int, ...); extern int ioctl(int, int, ...); extern int flock(int, int); extern int fsync(int); extern int fdatasync(int); extern int ftruncate(int, off_t); extern int ftruncate64(int, off64_t); extern int pause(void); extern unsigned int alarm(unsigned int); extern unsigned int sleep(unsigned int); extern int usleep(useconds_t); extern int gethostname(char *, size_t); extern void *__brk(void *); extern int brk(void *); extern void *sbrk(ptrdiff_t); extern int getopt(int, char * const *, const char *); extern char *optarg; extern int optind, opterr, optopt; extern int isatty(int); extern char* ttyname(int); extern int ttyname_r(int, char*, size_t); extern int acct(const char* filepath); int getpagesize(void); extern int sysconf(int name); extern int daemon(int, int); #if defined(__arm__) || (defined(__mips__) && !defined(__LP64__)) extern int cacheflush(long, long, long); /* __attribute__((deprecated("use __builtin___clear_cache instead"))); */ #endif extern pid_t tcgetpgrp(int fd); extern int tcsetpgrp(int fd, pid_t _pid); #if 0 /* MISSING FROM BIONIC */ extern int execlpe(const char *, const char *, ...); extern int getfsuid(uid_t); extern int setfsuid(uid_t); extern int getlogin_r(char* name, size_t namesize); extern int sethostname(const char *, size_t); extern int getdomainname(char *, size_t); extern int setdomainname(const char *, size_t); #endif /* MISSING */ /* 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; }) #if defined(__BIONIC_FORTIFY) 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) __asm__(__USER_LABEL_PREFIX__ "read"); __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); } #endif /* defined(__BIONIC_FORTIFY) */ __END_DECLS #endif /* _UNISTD_H_ */