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#include <pathconf.h> 38 39__BEGIN_DECLS 40 41/* Standard file descriptor numbers. */ 42#define STDIN_FILENO 0 43#define STDOUT_FILENO 1 44#define STDERR_FILENO 2 45 46/* Values for whence in fseek and lseek */ 47#define SEEK_SET 0 48#define SEEK_CUR 1 49#define SEEK_END 2 50 51extern char **environ; 52extern __noreturn void _exit(int); 53 54extern pid_t fork(void); 55extern pid_t vfork(void); 56extern pid_t getpid(void); 57extern pid_t gettid(void); 58extern pid_t getpgid(pid_t); 59extern int setpgid(pid_t, pid_t); 60extern pid_t getppid(void); 61extern pid_t getpgrp(void); 62extern int setpgrp(void); 63extern pid_t setsid(void); 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 execl(const char *, const char *, ...); 69extern int execlp(const char *, const char *, ...); 70extern int execle(const char *, const char *, ...); 71extern int capget(cap_user_header_t hdrp, cap_user_data_t datap); 72extern int capset(cap_user_header_t hdrp, const cap_user_data_t datap); 73extern int prctl(int option, unsigned long arg2, unsigned long arg3, 74 unsigned long arg4, unsigned long arg5); 75 76extern int nice(int); 77 78extern int setuid(uid_t); 79extern uid_t getuid(void); 80extern int seteuid(uid_t); 81extern uid_t geteuid(void); 82extern int setgid(gid_t); 83extern gid_t getgid(void); 84extern int setegid(gid_t); 85extern gid_t getegid(void); 86extern int getgroups(int, gid_t *); 87extern int setgroups(size_t, const gid_t *); 88extern int setreuid(uid_t, uid_t); 89extern int setregid(gid_t, gid_t); 90extern int setresuid(uid_t, uid_t, uid_t); 91extern int setresgid(gid_t, gid_t, gid_t); 92extern int getresuid(uid_t *ruid, uid_t *euid, uid_t *suid); 93extern int getresgid(gid_t *rgid, gid_t *egid, gid_t *sgid); 94extern int issetugid(void); 95extern char* getlogin(void); 96 97 98/* Macros for access() */ 99#define R_OK 4 /* Read */ 100#define W_OK 2 /* Write */ 101#define X_OK 1 /* Execute */ 102#define F_OK 0 /* Existence */ 103 104extern int access(const char *, int); 105extern int link(const char *, const char *); 106extern int unlink(const char *); 107extern int chdir(const char *); 108extern int fchdir(int); 109extern int rmdir(const char *); 110extern int pipe(int *); 111extern int chroot(const char *); 112extern int symlink(const char *, const char *); 113extern int readlink(const char *, char *, size_t); 114extern int chown(const char *, uid_t, gid_t); 115extern int fchown(int, uid_t, gid_t); 116extern int lchown(const char *, uid_t, gid_t); 117extern int truncate(const char *, off_t); 118extern char *getcwd(char *, size_t); 119 120extern int sync(void); 121 122extern int close(int); 123extern off_t lseek(int, off_t, int); 124extern loff_t lseek64(int, loff_t, int); 125 126extern ssize_t read(int, void *, size_t); 127extern ssize_t write(int, const void *, size_t); 128extern ssize_t pread(int, void *, size_t, off_t); 129extern ssize_t pwrite(int, const void *, size_t, off_t); 130 131extern int dup(int); 132extern int dup2(int, int); 133extern int fcntl(int, int, ...); 134extern int ioctl(int, int, ...); 135extern int flock(int, int); 136extern int fsync(int); 137extern int ftruncate(int, off_t); 138 139extern int pause(void); 140extern unsigned int alarm(unsigned int); 141extern unsigned int sleep(unsigned int); 142extern void usleep(unsigned long); 143 144extern int gethostname(char *, size_t); 145 146extern int getdtablesize(void); 147 148extern void *__brk(void *); 149extern int brk(void *); 150extern void *sbrk(ptrdiff_t); 151 152extern int getopt(int, char * const *, const char *); 153extern char *optarg; 154extern int optind, opterr, optopt; 155 156extern int isatty(int); 157extern char* ttyname(int); 158 159extern int acct(const char* filepath); 160 161static __inline__ int getpagesize(void) { 162 extern unsigned int __page_size; 163 return __page_size; 164} 165static __inline__ int __getpageshift(void) { 166 extern unsigned int __page_shift; 167 return __page_shift; 168} 169 170extern int sysconf(int name); 171 172extern int daemon(int, int); 173 174/* A special syscall that is only available on the ARM, not x86 function. */ 175extern int cacheflush(long start, long end, long flags); 176 177extern pid_t tcgetpgrp(int fd); 178extern int tcsetpgrp(int fd, pid_t _pid); 179 180#if 0 /* MISSING FROM BIONIC */ 181extern pid_t getsid(pid_t); 182extern int execvpe(const char *, char * const *, char * const *); 183extern int execlpe(const char *, const char *, ...); 184extern int getfsuid(uid_t); 185extern int setfsuid(uid_t); 186extern int fdatasync(int); 187extern int getlogin_r(char* name, size_t namesize); 188extern char* getusershell(void); 189extern void setusershell(void); 190extern void endusershell(void); 191extern int sethostname(const char *, size_t); 192extern int getdomainname(char *, size_t); 193extern int setdomainname(const char *, size_t); 194extern int ttyname_r(int, char*, size_t); 195#endif /* MISSING */ 196 197/* Used to retry syscalls that can return EINTR. */ 198#define TEMP_FAILURE_RETRY(exp) ({ \ 199 typeof (exp) _rc; \ 200 do { \ 201 _rc = (exp); \ 202 } while (_rc == -1 && errno == EINTR); \ 203 _rc; }) 204 205__END_DECLS 206 207#endif /* _UNISTD_H_ */ 208