544 lines
18 KiB
C
544 lines
18 KiB
C
/*
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* Copyright (C) 2008 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _UNISTD_H_
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#define _UNISTD_H_
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#include <stddef.h>
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <sys/select.h>
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#include <bits/fcntl.h>
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#include <bits/getopt.h>
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#include <bits/ioctl.h>
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#include <bits/lockf.h>
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#include <bits/posix_limits.h>
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#include <bits/sysconf.h>
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__BEGIN_DECLS
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#define STDIN_FILENO 0
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#define STDOUT_FILENO 1
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#define STDERR_FILENO 2
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#define F_OK 0
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#define X_OK 1
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#define W_OK 2
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#define R_OK 4
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#define SEEK_SET 0
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#define SEEK_CUR 1
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#define SEEK_END 2
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#define _PC_FILESIZEBITS 0
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#define _PC_LINK_MAX 1
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#define _PC_MAX_CANON 2
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#define _PC_MAX_INPUT 3
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#define _PC_NAME_MAX 4
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#define _PC_PATH_MAX 5
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#define _PC_PIPE_BUF 6
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#define _PC_2_SYMLINKS 7
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#define _PC_ALLOC_SIZE_MIN 8
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#define _PC_REC_INCR_XFER_SIZE 9
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#define _PC_REC_MAX_XFER_SIZE 10
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#define _PC_REC_MIN_XFER_SIZE 11
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#define _PC_REC_XFER_ALIGN 12
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#define _PC_SYMLINK_MAX 13
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#define _PC_CHOWN_RESTRICTED 14
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#define _PC_NO_TRUNC 15
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#define _PC_VDISABLE 16
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#define _PC_ASYNC_IO 17
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#define _PC_PRIO_IO 18
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#define _PC_SYNC_IO 19
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extern char** environ;
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extern __noreturn void _exit(int __status);
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extern pid_t fork(void);
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extern pid_t vfork(void);
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extern pid_t getpid(void);
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extern pid_t gettid(void) __pure2;
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extern pid_t getpgid(pid_t __pid);
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extern int setpgid(pid_t __pid, pid_t __pgid);
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extern pid_t getppid(void);
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extern pid_t getpgrp(void);
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extern int setpgrp(void);
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extern pid_t getsid(pid_t __pid) __INTRODUCED_IN(17);
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extern pid_t setsid(void);
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extern int execv(const char* __path, char* const* __argv);
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extern int execvp(const char* __file, char* const* __argv);
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extern int execvpe(const char* __file, char* const* __argv, char* const* __envp)
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__INTRODUCED_IN(21);
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extern int execve(const char* __file, char* const* __argv, char* const* __envp);
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extern int execl(const char* __path, const char* __arg0, ...);
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extern int execlp(const char* __file, const char* __arg0, ...);
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extern int execle(const char* __path, const char* __arg0, ...);
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extern int nice(int __incr);
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extern int setuid(uid_t __uid);
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extern uid_t getuid(void);
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extern int seteuid(uid_t __uid);
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extern uid_t geteuid(void);
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extern int setgid(gid_t __gid);
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extern gid_t getgid(void);
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extern int setegid(gid_t __gid);
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extern gid_t getegid(void);
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extern int getgroups(int __size, gid_t* __list);
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extern int setgroups(size_t __size, const gid_t* __list);
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extern int setreuid(uid_t __ruid, uid_t __euid);
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extern int setregid(gid_t __rgid, gid_t __egid);
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extern int setresuid(uid_t __ruid, uid_t __euid, uid_t __suid);
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extern int setresgid(gid_t __rgid, gid_t __egid, gid_t __sgid);
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extern int getresuid(uid_t* __ruid, uid_t* __euid, uid_t* __suid);
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extern int getresgid(gid_t* __rgid, gid_t* __egid, gid_t* __sgid);
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extern char* getlogin(void);
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extern long fpathconf(int __fd, int __name);
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extern long pathconf(const char* __path, int __name);
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extern int access(const char* __path, int __mode);
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extern int faccessat(int __dirfd, const char* __path, int __mode, int __flags)
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__INTRODUCED_IN(16);
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extern int link(const char* __oldpath, const char* __newpath);
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extern int linkat(int __olddirfd, const char* __oldpath, int __newdirfd,
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const char* __newpath, int __flags) __INTRODUCED_IN(21);
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extern int unlink(const char* __path);
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extern int unlinkat(int __dirfd, const char* __path, int __flags);
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extern int chdir(const char* __path);
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extern int fchdir(int __fd);
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extern int rmdir(const char* __path);
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extern int pipe(int* __pipefd);
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#if defined(__USE_GNU)
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extern int pipe2(int* __pipefd, int __flags) __INTRODUCED_IN(9);
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#endif
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extern int chroot(const char* __path);
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extern int symlink(const char* __oldpath, const char* __newpath);
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extern int symlinkat(const char* __oldpath, int __newdirfd,
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const char* __newpath) __INTRODUCED_IN(21);
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extern ssize_t readlink(const char* __path, char* __buf, size_t __bufsiz);
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extern ssize_t readlinkat(int __dirfd, const char* __path, char* __buf,
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size_t __bufsiz) __INTRODUCED_IN(21);
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extern int chown(const char* __path, uid_t __owner, gid_t __group);
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extern int fchown(int __fd, uid_t __owner, gid_t __group);
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extern int fchownat(int __dirfd, const char* __path, uid_t __owner,
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gid_t __group, int __flags);
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extern int lchown(const char* __path, uid_t __owner, gid_t __group);
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extern char* getcwd(char* __buf, size_t __size);
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extern int sync(void);
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extern int close(int __fd);
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extern ssize_t read(int __fd, void* __buf, size_t __count);
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extern ssize_t write(int __fd, const void* __buf, size_t __count);
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extern int dup(int __oldfd);
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extern int dup2(int __oldfd, int __newfd);
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extern int dup3(int __oldfd, int __newfd, int __flags) __INTRODUCED_IN(21);
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extern int fsync(int __fd);
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extern int fdatasync(int __fd) __INTRODUCED_IN(9);
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#if defined(__USE_FILE_OFFSET64)
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extern off_t lseek(int __fd, off_t __offset, int __whence) __RENAME(lseek64);
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#else
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extern off_t lseek(int __fd, off_t __offset, int __whence);
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#endif
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extern off64_t lseek64(int __fd, off64_t __offset, int __whence);
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#if defined(__USE_FILE_OFFSET64) && __ANDROID_API__ >= 21
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extern int truncate(const char* __path, off_t __length) __RENAME(truncate64) __INTRODUCED_IN(21);
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extern ssize_t pread(int __fd, void* __buf, size_t __count, off_t __offset) __RENAME(pread64)
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__INTRODUCED_IN(12);
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extern ssize_t pwrite(int __fd, const void* __buf, size_t __count, off_t __offset)
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__RENAME(pwrite64) __INTRODUCED_IN(12);
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extern int ftruncate(int __fd, off_t __length) __RENAME(ftruncate64) __INTRODUCED_IN(12);
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#else
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extern int truncate(const char* __path, off_t __length);
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extern ssize_t pread(int __fd, void* __buf, size_t __count, off_t __offset);
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extern ssize_t pwrite(int __fd, const void* __buf, size_t __count,
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off_t __offset);
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extern int ftruncate(int __fd, off_t __length);
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#endif
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extern int truncate64(const char* __path, off64_t __length) __INTRODUCED_IN(21);
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extern ssize_t pread64(int __fd, void* __buf, size_t __count, off64_t __offset) __INTRODUCED_IN(12);
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extern ssize_t pwrite64(int __fd, const void* __buf, size_t __count, off64_t __offset)
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__INTRODUCED_IN(12);
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extern int ftruncate64(int __fd, off64_t __length) __INTRODUCED_IN(12);
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extern int pause(void);
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extern unsigned int alarm(unsigned int __seconds);
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extern unsigned int sleep(unsigned int __seconds);
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extern int usleep(useconds_t __usec);
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int gethostname(char* __name, size_t __len);
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int sethostname(const char* __name, size_t __len) __INTRODUCED_IN(23);
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extern int brk(void* __addr);
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extern void* sbrk(ptrdiff_t __increment);
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extern int isatty(int __fd);
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extern char* ttyname(int __fd);
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extern int ttyname_r(int __fd, char* __buf, size_t __buflen) __INTRODUCED_IN(8);
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extern int acct(const char* __filepath);
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#if __ANDROID_API__ >= 21
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int getpagesize(void);
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#else
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__inline__ int getpagesize(void) {
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return sysconf(_SC_PAGESIZE);
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}
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#endif
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long syscall(long __number, ...);
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extern int daemon(int __nochdir, int __noclose);
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#if defined(__arm__) || (defined(__mips__) && !defined(__LP64__))
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extern int cacheflush(long __addr, long __nbytes, long __cache);
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/* __attribute__((deprecated("use __builtin___clear_cache instead"))); */
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#endif
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extern pid_t tcgetpgrp(int __fd);
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extern int tcsetpgrp(int __fd, pid_t __pid);
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/* Used to retry syscalls that can return EINTR. */
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#define TEMP_FAILURE_RETRY(exp) ({ \
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__typeof__(exp) _rc; \
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do { \
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_rc = (exp); \
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} while (_rc == -1 && errno == EINTR); \
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_rc; })
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/* TODO(unified-headers): Factor out all the FORTIFY features. */
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extern char* __getcwd_chk(char*, size_t, size_t) __INTRODUCED_IN(24);
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__errordecl(__getcwd_dest_size_error, "getcwd called with size bigger than destination");
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extern char* __getcwd_real(char*, size_t) __RENAME(getcwd);
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extern ssize_t __pread_chk(int, void*, size_t, off_t, size_t) __INTRODUCED_IN(23);
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__errordecl(__pread_dest_size_error, "pread called with size bigger than destination");
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__errordecl(__pread_count_toobig_error, "pread called with count > SSIZE_MAX");
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extern ssize_t __pread_real(int, void*, size_t, off_t) __RENAME(pread);
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extern ssize_t __pread64_chk(int, void*, size_t, off64_t, size_t) __INTRODUCED_IN(23);
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__errordecl(__pread64_dest_size_error, "pread64 called with size bigger than destination");
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__errordecl(__pread64_count_toobig_error, "pread64 called with count > SSIZE_MAX");
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extern ssize_t __pread64_real(int, void*, size_t, off64_t) __RENAME(pread64) __INTRODUCED_IN(12);
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extern ssize_t __pwrite_chk(int, const void*, size_t, off_t, size_t) __INTRODUCED_IN(24);
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__errordecl(__pwrite_dest_size_error, "pwrite called with size bigger than destination");
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__errordecl(__pwrite_count_toobig_error, "pwrite called with count > SSIZE_MAX");
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extern ssize_t __pwrite_real(int, const void*, size_t, off_t) __RENAME(pwrite);
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extern ssize_t __pwrite64_chk(int, const void*, size_t, off64_t, size_t) __INTRODUCED_IN(24);
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__errordecl(__pwrite64_dest_size_error, "pwrite64 called with size bigger than destination");
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__errordecl(__pwrite64_count_toobig_error, "pwrite64 called with count > SSIZE_MAX");
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extern ssize_t __pwrite64_real(int, const void*, size_t, off64_t) __RENAME(pwrite64)
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__INTRODUCED_IN(12);
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extern ssize_t __read_chk(int, void*, size_t, size_t) __INTRODUCED_IN(21);
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__errordecl(__read_dest_size_error, "read called with size bigger than destination");
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__errordecl(__read_count_toobig_error, "read called with count > SSIZE_MAX");
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extern ssize_t __read_real(int, void*, size_t) __RENAME(read);
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extern ssize_t __write_chk(int, const void*, size_t, size_t) __INTRODUCED_IN(24);
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__errordecl(__write_dest_size_error, "write called with size bigger than destination");
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__errordecl(__write_count_toobig_error, "write called with count > SSIZE_MAX");
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extern ssize_t __write_real(int, const void*, size_t) __RENAME(write);
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extern ssize_t __readlink_chk(const char*, char*, size_t, size_t) __INTRODUCED_IN(23);
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__errordecl(__readlink_dest_size_error, "readlink called with size bigger than destination");
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__errordecl(__readlink_size_toobig_error, "readlink called with size > SSIZE_MAX");
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extern ssize_t __readlink_real(const char*, char*, size_t) __RENAME(readlink);
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extern ssize_t __readlinkat_chk(int dirfd, const char*, char*, size_t, size_t) __INTRODUCED_IN(23);
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__errordecl(__readlinkat_dest_size_error, "readlinkat called with size bigger than destination");
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__errordecl(__readlinkat_size_toobig_error, "readlinkat called with size > SSIZE_MAX");
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extern ssize_t __readlinkat_real(int dirfd, const char*, char*, size_t) __RENAME(readlinkat) __INTRODUCED_IN(21);
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extern int getdomainname(char*, size_t) __INTRODUCED_IN_FUTURE;
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extern int setdomainname(const char*, size_t) __INTRODUCED_IN_FUTURE;
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#if defined(__BIONIC_FORTIFY)
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__BIONIC_FORTIFY_INLINE
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char* getcwd(char* buf, size_t size) {
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size_t bos = __bos(buf);
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#if defined(__clang__)
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/*
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* Work around LLVM's incorrect __builtin_object_size implementation here
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* to avoid needing the workaround in the __getcwd_chk ABI forever.
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*
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* https://llvm.org/bugs/show_bug.cgi?id=23277
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*/
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if (buf == NULL) {
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bos = __BIONIC_FORTIFY_UNKNOWN_SIZE;
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}
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#else
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if (bos == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
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return __getcwd_real(buf, size);
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}
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if (__builtin_constant_p(size) && (size > bos)) {
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__getcwd_dest_size_error();
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}
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if (__builtin_constant_p(size) && (size <= bos)) {
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return __getcwd_real(buf, size);
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}
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#endif
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return __getcwd_chk(buf, size, bos);
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}
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#if defined(__USE_FILE_OFFSET64)
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#define __PREAD_PREFIX(x) __pread64_ ## x
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#else
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#define __PREAD_PREFIX(x) __pread_ ## x
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#endif
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__BIONIC_FORTIFY_INLINE
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ssize_t pread(int fd, void* buf, size_t count, off_t offset) {
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size_t bos = __bos0(buf);
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#if !defined(__clang__)
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if (__builtin_constant_p(count) && (count > SSIZE_MAX)) {
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__PREAD_PREFIX(count_toobig_error)();
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}
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if (bos == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
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return __PREAD_PREFIX(real)(fd, buf, count, offset);
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}
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if (__builtin_constant_p(count) && (count > bos)) {
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__PREAD_PREFIX(dest_size_error)();
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}
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if (__builtin_constant_p(count) && (count <= bos)) {
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return __PREAD_PREFIX(real)(fd, buf, count, offset);
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}
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#endif
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return __PREAD_PREFIX(chk)(fd, buf, count, offset, bos);
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}
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__BIONIC_FORTIFY_INLINE
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ssize_t pread64(int fd, void* buf, size_t count, off64_t offset) {
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size_t bos = __bos0(buf);
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#if !defined(__clang__)
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if (__builtin_constant_p(count) && (count > SSIZE_MAX)) {
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__pread64_count_toobig_error();
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}
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if (bos == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
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return __pread64_real(fd, buf, count, offset);
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}
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if (__builtin_constant_p(count) && (count > bos)) {
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__pread64_dest_size_error();
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}
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if (__builtin_constant_p(count) && (count <= bos)) {
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return __pread64_real(fd, buf, count, offset);
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}
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#endif
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return __pread64_chk(fd, buf, count, offset, bos);
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}
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#if defined(__USE_FILE_OFFSET64)
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#define __PWRITE_PREFIX(x) __pwrite64_ ## x
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#else
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#define __PWRITE_PREFIX(x) __pwrite_ ## x
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#endif
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__BIONIC_FORTIFY_INLINE
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ssize_t pwrite(int fd, const void* buf, size_t count, off_t offset) {
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size_t bos = __bos0(buf);
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#if !defined(__clang__)
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if (__builtin_constant_p(count) && (count > SSIZE_MAX)) {
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__PWRITE_PREFIX(count_toobig_error)();
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}
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if (bos == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
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return __PWRITE_PREFIX(real)(fd, buf, count, offset);
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}
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if (__builtin_constant_p(count) && (count > bos)) {
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__PWRITE_PREFIX(dest_size_error)();
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}
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if (__builtin_constant_p(count) && (count <= bos)) {
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return __PWRITE_PREFIX(real)(fd, buf, count, offset);
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}
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#endif
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return __PWRITE_PREFIX(chk)(fd, buf, count, offset, bos);
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}
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__BIONIC_FORTIFY_INLINE
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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_ */
|