text: /*
   * 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_
  #define UNISTD_H_
  #define UNISTD_H
  #define _UNISTD_H
  
  #include <stddef.h>
  #include <museum/7.0.0/bionic/libc/sys/cdefs.h>
  #include <museum/7.0.0/bionic/libc/sys/types.h>
  #include <museum/7.0.0/bionic/libc/sys/select.h>
  #include <museum/7.0.0/bionic/libc/sys/sysconf.h>
  
  #include <museum/7.0.0/bionic/libc/bits/lockf.h>
  #include <museum/7.0.0/bionic/libc/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 fcntl(int __fd, int __cmd, ...);
  extern int ioctl(int __fd, int __request, ...);
  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);
  
  #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_ */
  