unistd.h revision 4e468ed2eb86a2406e14f1eca82072ee501d05fd
1/* 2 * Copyright (C) 2008 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28#ifndef _UNISTD_H_ 29#define _UNISTD_H_ 30 31#include <stddef.h> 32#include <sys/cdefs.h> 33#include <sys/types.h> 34#include <sys/select.h> 35#include <sys/sysconf.h> 36#include <linux/capability.h> 37 38__BEGIN_DECLS 39 40/* Standard file descriptor numbers. */ 41#define STDIN_FILENO 0 42#define STDOUT_FILENO 1 43#define STDERR_FILENO 2 44 45/* Values for whence in fseek and lseek */ 46#define SEEK_SET 0 47#define SEEK_CUR 1 48#define SEEK_END 2 49 50extern char **environ; 51extern __noreturn void _exit(int); 52 53extern pid_t fork(void); 54extern pid_t vfork(void); 55extern pid_t getpid(void); 56extern pid_t gettid(void); 57extern pid_t getpgid(pid_t); 58extern int setpgid(pid_t, pid_t); 59extern pid_t getppid(void); 60extern pid_t getpgrp(void); 61extern int setpgrp(void); 62extern pid_t setsid(void); 63extern pid_t getsid(pid_t); 64 65extern int execv(const char *, char * const *); 66extern int execvp(const char *, char * const *); 67extern int execve(const char *, char * const *, char * const *); 68extern int execvpe(const char *, char * const *, char * const *); 69extern int execl(const char *, const char *, ...); 70extern int execlp(const char *, const char *, ...); 71extern int execle(const char *, const char *, ...); 72extern int execlpe(const char *, const char *, ...); 73extern int capget(cap_user_header_t hdrp, cap_user_data_t datap); 74extern int capset(cap_user_header_t hdrp, const cap_user_data_t datap); 75extern int prctl(int option, unsigned long arg2, unsigned long arg3, 76 unsigned long arg4, unsigned long arg5); 77 78extern int nice(int); 79 80extern int setuid(uid_t); 81extern uid_t getuid(void); 82extern int seteuid(uid_t); 83extern uid_t geteuid(void); 84extern int setgid(gid_t); 85extern gid_t getgid(void); 86extern int setegid(gid_t); 87extern gid_t getegid(void); 88extern int getgroups(int, gid_t *); 89extern int setgroups(size_t, const gid_t *); 90extern int setreuid(uid_t, uid_t); 91extern int setregid(gid_t, gid_t); 92extern int setresuid(uid_t, uid_t, uid_t); 93extern int setresgid(gid_t, gid_t, gid_t); 94extern int getresuid(uid_t *ruid, uid_t *euid, uid_t *suid); 95extern int getresgid(gid_t *rgid, gid_t *egid, gid_t *sgid); 96extern int getfsuid(uid_t); 97extern int setfsuid(uid_t); 98extern int issetugid(void); 99extern char* getlogin(void); 100extern int getlogin_r(char* name, size_t namesize); 101 102 103/* Macros for access() */ 104#define R_OK 4 /* Read */ 105#define W_OK 2 /* Write */ 106#define X_OK 1 /* Execute */ 107#define F_OK 0 /* Existence */ 108 109extern int access(const char *, int); 110extern int link(const char *, const char *); 111extern int unlink(const char *); 112extern int chdir(const char *); 113extern int fchdir(int); 114extern int chmod(const char *, mode_t); 115extern int fchmod(int, mode_t); 116extern int mkdir(const char *, mode_t); 117extern int rmdir(const char *); 118extern int pipe(int *); 119extern int chroot(const char *); 120extern int symlink(const char *, const char *); 121extern int readlink(const char *, char *, size_t); 122extern int chown(const char *, uid_t, gid_t); 123extern int fchown(int, uid_t, gid_t); 124extern int lchown(const char *, uid_t, gid_t); 125extern char *getcwd(char *, size_t); 126 127extern int sync(void); 128 129extern int close(int); 130extern off_t lseek(int, off_t, int); 131extern loff_t lseek64(int, loff_t, int); 132 133extern ssize_t read(int, void *, size_t); 134extern ssize_t write(int, const void *, size_t); 135extern ssize_t pread(int, void *, size_t, off_t); 136extern ssize_t pwrite(int, void *, size_t, off_t); 137 138extern int dup(int); 139extern int dup2(int, int); 140extern int fcntl(int, int, ...); 141extern int ioctl(int, int, ...); 142extern int flock(int, int); 143extern int fsync(int); 144extern int fdatasync(int); 145extern int ftruncate(int, off_t); 146 147extern int pause(void); 148extern unsigned int alarm(unsigned int); 149extern unsigned int sleep(unsigned int); 150extern void usleep(unsigned long); 151 152extern int gethostname(char *, size_t); 153extern int sethostname(const char *, size_t); 154extern int getdomainname(char *, size_t); 155extern int setdomainname(const char *, size_t); 156 157extern int getdtablesize(void); 158 159extern void *__brk(void *); 160extern int brk(void *); 161extern void *sbrk(ptrdiff_t); 162 163extern int getopt(int, char * const *, const char *); 164extern char *optarg; 165extern int optind, opterr, optopt; 166 167extern int isatty(int); 168 169extern int acct(const char* filepath); 170 171static __inline__ int getpagesize(void) { 172 extern unsigned int __page_size; 173 return __page_size; 174} 175static __inline__ int __getpageshift(void) { 176 extern unsigned int __page_shift; 177 return __page_shift; 178} 179 180extern int sysconf(int name); 181 182extern int daemon(int, int); 183 184/* A special syscall that is only available on the ARM, not x86 function. */ 185extern int cacheflush(long start, long end, long flags); 186 187extern pid_t tcgetpgrp(int fd); 188extern int tcsetpgrp(int fd, pid_t _pid); 189 190__END_DECLS 191 192#endif /* _UNISTD_H_ */ 193