389 lines
12 KiB
C
389 lines
12 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 <sys/sysconf.h>
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#include <machine/posix_limits.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);
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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);
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extern int setpgid(pid_t, pid_t);
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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);
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extern pid_t setsid(void);
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extern int execv(const char *, char * const *);
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extern int execvp(const char *, char * const *);
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extern int execvpe(const char *, char * const *, char * const *);
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extern int execve(const char *, char * const *, char * const *);
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extern int execl(const char *, const char *, ...);
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extern int execlp(const char *, const char *, ...);
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extern int execle(const char *, const char *, ...);
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extern int nice(int);
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extern int setuid(uid_t);
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extern uid_t getuid(void);
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extern int seteuid(uid_t);
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extern uid_t geteuid(void);
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extern int setgid(gid_t);
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extern gid_t getgid(void);
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extern int setegid(gid_t);
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extern gid_t getegid(void);
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extern int getgroups(int, gid_t *);
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extern int setgroups(size_t, const gid_t *);
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extern int setreuid(uid_t, uid_t);
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extern int setregid(gid_t, gid_t);
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extern int setresuid(uid_t, uid_t, uid_t);
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extern int setresgid(gid_t, gid_t, gid_t);
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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, int);
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extern long pathconf(const char*, int);
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extern int access(const char*, int);
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extern int faccessat(int, const char*, int, int);
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extern int link(const char*, const char*);
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extern int linkat(int, const char*, int, const char*, int);
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extern int unlink(const char*);
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extern int unlinkat(int, const char*, int);
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extern int chdir(const char *);
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extern int fchdir(int);
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extern int rmdir(const char *);
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extern int pipe(int *);
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#if defined(__USE_GNU)
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extern int pipe2(int *, int);
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#endif
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extern int chroot(const char *);
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extern int symlink(const char*, const char*);
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extern int symlinkat(const char*, int, const char*);
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extern ssize_t readlink(const char*, char*, size_t);
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extern ssize_t readlinkat(int, const char*, char*, size_t);
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extern int chown(const char *, uid_t, gid_t);
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extern int fchown(int, uid_t, gid_t);
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extern int fchownat(int, const char*, uid_t, gid_t, int);
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extern int lchown(const char *, uid_t, gid_t);
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extern char *getcwd(char *, size_t);
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extern int sync(void);
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extern int close(int);
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extern ssize_t read(int, void *, size_t);
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extern ssize_t write(int, const void *, size_t);
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extern int dup(int);
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extern int dup2(int, int);
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extern int dup3(int, int, int);
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extern int fcntl(int, int, ...);
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extern int ioctl(int, int, ...);
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extern int fsync(int);
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extern int fdatasync(int);
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#if defined(__USE_FILE_OFFSET64)
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extern int truncate(const char *, off_t) __RENAME(truncate64);
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extern off_t lseek(int, off_t, int) __RENAME(lseek64);
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extern ssize_t pread(int, void *, size_t, off_t) __RENAME(pread64);
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extern ssize_t pwrite(int, const void *, size_t, off_t) __RENAME(pwrite64);
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extern int ftruncate(int, off_t) __RENAME(ftruncate64);
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#else
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extern int truncate(const char *, off_t);
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extern off_t lseek(int, off_t, int);
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extern ssize_t pread(int, void *, size_t, off_t);
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extern ssize_t pwrite(int, const void *, size_t, off_t);
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extern int ftruncate(int, off_t);
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#endif
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extern int truncate64(const char *, off64_t);
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extern off64_t lseek64(int, off64_t, int);
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extern ssize_t pread64(int, void *, size_t, off64_t);
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extern ssize_t pwrite64(int, const void *, size_t, off64_t);
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extern int ftruncate64(int, off64_t);
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extern int pause(void);
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extern unsigned int alarm(unsigned int);
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extern unsigned int sleep(unsigned int);
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extern int usleep(useconds_t);
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int gethostname(char*, size_t);
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int sethostname(const char*, size_t);
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extern void *__brk(void *);
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extern int brk(void *);
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extern void *sbrk(ptrdiff_t);
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extern int getopt(int, char * const *, const char *);
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extern char *optarg;
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extern int optind, opterr, optopt;
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extern int isatty(int);
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extern char* ttyname(int);
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extern int ttyname_r(int, char*, size_t);
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extern int acct(const char* filepath);
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int getpagesize(void);
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long sysconf(int);
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long syscall(long number, ...);
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extern int daemon(int, int);
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#if defined(__arm__) || (defined(__mips__) && !defined(__LP64__))
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extern int cacheflush(long, long, long);
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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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extern ssize_t __pread_chk(int, void*, size_t, off_t, size_t);
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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);
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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);
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extern ssize_t __read_chk(int, void*, size_t, size_t);
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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 __readlink_chk(const char*, char*, size_t, size_t);
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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);
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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);
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#if defined(__BIONIC_FORTIFY)
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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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__BIONIC_FORTIFY_INLINE
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ssize_t read(int fd, void* buf, size_t count) {
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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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__read_count_toobig_error();
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}
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if (bos == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
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return __read_real(fd, buf, count);
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}
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if (__builtin_constant_p(count) && (count > bos)) {
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__read_dest_size_error();
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}
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if (__builtin_constant_p(count) && (count <= bos)) {
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return __read_real(fd, buf, count);
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}
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#endif
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return __read_chk(fd, buf, count, bos);
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}
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__BIONIC_FORTIFY_INLINE
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ssize_t readlink(const char* path, 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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if (__builtin_constant_p(size) && (size > SSIZE_MAX)) {
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__readlink_size_toobig_error();
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}
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if (bos == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
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return __readlink_real(path, buf, size);
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}
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if (__builtin_constant_p(size) && (size > bos)) {
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__readlink_dest_size_error();
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}
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if (__builtin_constant_p(size) && (size <= bos)) {
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return __readlink_real(path, buf, size);
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}
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#endif
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return __readlink_chk(path, buf, size, bos);
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}
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__BIONIC_FORTIFY_INLINE
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ssize_t readlinkat(int dirfd, const char* path, 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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if (__builtin_constant_p(size) && (size > SSIZE_MAX)) {
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__readlinkat_size_toobig_error();
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}
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if (bos == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
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return __readlinkat_real(dirfd, path, buf, size);
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}
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if (__builtin_constant_p(size) && (size > bos)) {
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__readlinkat_dest_size_error();
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}
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if (__builtin_constant_p(size) && (size <= bos)) {
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return __readlinkat_real(dirfd, path, buf, size);
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}
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#endif
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return __readlinkat_chk(dirfd, path, buf, size, bos);
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}
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#endif /* defined(__BIONIC_FORTIFY) */
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__END_DECLS
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#endif /* _UNISTD_H_ */
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