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); 96extern char* getusershell(void); 97extern void setusershell(void); 98extern void endusershell(void); 99 100 101 102/* Macros for access() */ 103#define R_OK 4 /* Read */ 104#define W_OK 2 /* Write */ 105#define X_OK 1 /* Execute */ 106#define F_OK 0 /* Existence */ 107 108extern int access(const char *, int); 109extern int link(const char *, const char *); 110extern int unlink(const char *); 111extern int chdir(const char *); 112extern int fchdir(int); 113extern int rmdir(const char *); 114extern int pipe(int *); 115#ifdef _GNU_SOURCE /* GLibc compatibility */ 116extern int pipe2(int *, int); 117#endif 118extern int chroot(const char *); 119extern int symlink(const char *, const char *); 120extern int readlink(const char *, char *, size_t); 121extern int chown(const char *, uid_t, gid_t); 122extern int fchown(int, uid_t, gid_t); 123extern int lchown(const char *, uid_t, gid_t); 124extern int truncate(const char *, off_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, const 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 int usleep(unsigned long); 151 152extern int gethostname(char *, size_t); 153 154extern int getdtablesize(void); 155 156extern void *__brk(void *); 157extern int brk(void *); 158extern void *sbrk(ptrdiff_t); 159 160extern int getopt(int, char * const *, const char *); 161extern char *optarg; 162extern int optind, opterr, optopt; 163 164extern int isatty(int); 165extern char* ttyname(int); 166extern int ttyname_r(int, char*, size_t); 167 168extern int acct(const char* filepath); 169 170static __inline__ int getpagesize(void) { 171 extern unsigned int __page_size; 172 return __page_size; 173} 174static __inline__ int __getpageshift(void) { 175 extern unsigned int __page_shift; 176 return __page_shift; 177} 178 179extern int sysconf(int name); 180 181extern int daemon(int, int); 182 183/* A special syscall that is only available on the ARM, not x86 function. */ 184extern int cacheflush(long start, long end, long flags); 185 186extern pid_t tcgetpgrp(int fd); 187extern int tcsetpgrp(int fd, pid_t _pid); 188 189#if 0 /* MISSING FROM BIONIC */ 190extern pid_t getsid(pid_t); 191extern int execvpe(const char *, char * const *, char * const *); 192extern int execlpe(const char *, const char *, ...); 193extern int getfsuid(uid_t); 194extern int setfsuid(uid_t); 195extern int getlogin_r(char* name, size_t namesize); 196extern int sethostname(const char *, size_t); 197extern int getdomainname(char *, size_t); 198extern int setdomainname(const char *, size_t); 199#endif /* MISSING */ 200 201/* Used to retry syscalls that can return EINTR. */ 202#define TEMP_FAILURE_RETRY(exp) ({ \ 203 typeof (exp) _rc; \ 204 do { \ 205 _rc = (exp); \ 206 } while (_rc == -1 && errno == EINTR); \ 207 _rc; }) 208 209__END_DECLS 210 211#endif /* _UNISTD_H_ */ 212