241 lines
7.4 KiB
C
241 lines
7.4 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 <pathconf.h>
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__BEGIN_DECLS
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/* Standard file descriptor numbers. */
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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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/* Values for whence in fseek and lseek */
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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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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);
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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 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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/* IMPORTANT: See comment under <sys/prctl.h> about this declaration */
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extern int prctl(int option, ...);
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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 int issetugid(void);
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extern char* getlogin(void);
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extern char* getusershell(void);
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extern void setusershell(void);
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extern void endusershell(void);
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/* Macros for access() */
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#define R_OK 4 /* Read */
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#define W_OK 2 /* Write */
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#define X_OK 1 /* Execute */
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#define F_OK 0 /* Existence */
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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 unlink(const char *);
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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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#ifdef _GNU_SOURCE /* GLibc compatibility */
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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 readlink(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 lchown(const char *, uid_t, gid_t);
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extern int truncate(const char *, off_t);
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extern int truncate64(const char *, off64_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 off_t lseek(int, off_t, int);
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extern off64_t lseek64(int, off64_t, 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 ssize_t pread(int, void *, size_t, off_t);
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extern ssize_t pread64(int, void *, size_t, off64_t);
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extern ssize_t pwrite(int, const void *, size_t, off_t);
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extern ssize_t pwrite64(int, const void *, size_t, off64_t);
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extern int dup(int);
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extern int dup2(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 flock(int, int);
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extern int fsync(int);
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extern int fdatasync(int);
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extern int ftruncate(int, off_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(unsigned long);
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extern int gethostname(char *, size_t);
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extern int getdtablesize(void);
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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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extern int sysconf(int name);
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extern int daemon(int, int);
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/* A special syscall that is only available on the ARM, not x86 function. */
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extern int cacheflush(long start, long end, long flags);
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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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#if 0 /* MISSING FROM BIONIC */
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extern int execvpe(const char *, char * const *, char * const *);
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extern int execlpe(const char *, const char *, ...);
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extern int getfsuid(uid_t);
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extern int setfsuid(uid_t);
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extern int getlogin_r(char* name, size_t namesize);
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extern int sethostname(const char *, size_t);
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extern int getdomainname(char *, size_t);
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extern int setdomainname(const char *, size_t);
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#endif /* MISSING */
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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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#if defined(__BIONIC_FORTIFY)
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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)
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__asm__(__USER_LABEL_PREFIX__ "read");
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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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#endif /* defined(__BIONIC_FORTIFY) */
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__END_DECLS
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#endif /* _UNISTD_H_ */
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