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 51 extern char **environ; 52 extern __noreturn void _exit(int); 53 54 extern pid_t fork(void); 55 extern pid_t vfork(void); 56 extern pid_t getpid(void); 57 extern pid_t gettid(void); 58 extern pid_t getpgid(pid_t); 59 extern int setpgid(pid_t, pid_t); 60 extern pid_t getppid(void); 61 extern pid_t getpgrp(void); 62 extern int setpgrp(void); 63 extern pid_t setsid(void); 64 65 extern int execv(const char *, char * const *); 66 extern int execvp(const char *, char * const *); 67 extern int execve(const char *, char * const *, char * const *); 68 extern int execl(const char *, const char *, ...); 69 extern int execlp(const char *, const char *, ...); 70 extern int execle(const char *, const char *, ...); 71 extern int capget(cap_user_header_t hdrp, cap_user_data_t datap); 72 extern int capset(cap_user_header_t hdrp, const cap_user_data_t datap); 73 74 /* IMPORTANT: See comment under <sys/prctl.h> about this declaration */ 75 extern int prctl(int option, ...); 76 77 extern int nice(int); 78 79 extern int setuid(uid_t); 80 extern uid_t getuid(void); 81 extern int seteuid(uid_t); 82 extern uid_t geteuid(void); 83 extern int setgid(gid_t); 84 extern gid_t getgid(void); 85 extern int setegid(gid_t); 86 extern gid_t getegid(void); 87 extern int getgroups(int, gid_t *); 88 extern int setgroups(size_t, const gid_t *); 89 extern int setreuid(uid_t, uid_t); 90 extern int setregid(gid_t, gid_t); 91 extern int setresuid(uid_t, uid_t, uid_t); 92 extern int setresgid(gid_t, gid_t, gid_t); 93 extern int getresuid(uid_t *ruid, uid_t *euid, uid_t *suid); 94 extern int getresgid(gid_t *rgid, gid_t *egid, gid_t *sgid); 95 extern int issetugid(void); 96 extern char* getlogin(void); 97 extern char* getusershell(void); 98 extern void setusershell(void); 99 extern void endusershell(void); 100 101 102 103 /* 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 */ 108 109 extern int access(const char *, int); 110 extern int link(const char *, const char *); 111 extern int unlink(const char *); 112 extern int chdir(const char *); 113 extern int fchdir(int); 114 extern int rmdir(const char *); 115 extern int pipe(int *); 116 #ifdef _GNU_SOURCE /* GLibc compatibility */ 117 extern int pipe2(int *, int); 118 #endif 119 extern int chroot(const char *); 120 extern int symlink(const char *, const char *); 121 extern int readlink(const char *, char *, size_t); 122 extern int chown(const char *, uid_t, gid_t); 123 extern int fchown(int, uid_t, gid_t); 124 extern int lchown(const char *, uid_t, gid_t); 125 extern int truncate(const char *, off_t); 126 extern char *getcwd(char *, size_t); 127 128 extern int sync(void); 129 130 extern int close(int); 131 extern off_t lseek(int, off_t, int); 132 extern off64_t lseek64(int, off64_t, int); 133 134 extern ssize_t read(int, void *, size_t); 135 extern ssize_t write(int, const void *, size_t); 136 extern ssize_t pread(int, void *, size_t, off_t); 137 extern ssize_t pwrite(int, const void *, size_t, off_t); 138 139 extern int dup(int); 140 extern int dup2(int, int); 141 extern int fcntl(int, int, ...); 142 extern int ioctl(int, int, ...); 143 extern int flock(int, int); 144 extern int fsync(int); 145 extern int fdatasync(int); 146 extern int ftruncate(int, off_t); 147 148 extern int pause(void); 149 extern unsigned int alarm(unsigned int); 150 extern unsigned int sleep(unsigned int); 151 extern int usleep(unsigned long); 152 153 extern int gethostname(char *, size_t); 154 155 extern int getdtablesize(void); 156 157 extern void *__brk(void *); 158 extern int brk(void *); 159 extern void *sbrk(ptrdiff_t); 160 161 extern int getopt(int, char * const *, const char *); 162 extern char *optarg; 163 extern int optind, opterr, optopt; 164 165 extern int isatty(int); 166 extern char* ttyname(int); 167 extern int ttyname_r(int, char*, size_t); 168 169 extern int acct(const char* filepath); 170 171 static __inline__ int getpagesize(void) { 172 extern unsigned int __page_size; 173 return __page_size; 174 } 175 static __inline__ int __getpageshift(void) { 176 extern unsigned int __page_shift; 177 return __page_shift; 178 } 179 180 extern int sysconf(int name); 181 182 extern int daemon(int, int); 183 184 /* A special syscall that is only available on the ARM, not x86 function. */ 185 extern int cacheflush(long start, long end, long flags); 186 187 extern pid_t tcgetpgrp(int fd); 188 extern int tcsetpgrp(int fd, pid_t _pid); 189 190 #if 0 /* MISSING FROM BIONIC */ 191 extern pid_t getsid(pid_t); 192 extern int execvpe(const char *, char * const *, char * const *); 193 extern int execlpe(const char *, const char *, ...); 194 extern int getfsuid(uid_t); 195 extern int setfsuid(uid_t); 196 extern int getlogin_r(char* name, size_t namesize); 197 extern int sethostname(const char *, size_t); 198 extern int getdomainname(char *, size_t); 199 extern int setdomainname(const char *, size_t); 200 #endif /* MISSING */ 201 202 /* Used to retry syscalls that can return EINTR. */ 203 #define TEMP_FAILURE_RETRY(exp) ({ \ 204 typeof (exp) _rc; \ 205 do { \ 206 _rc = (exp); \ 207 } while (_rc == -1 && errno == EINTR); \ 208 _rc; }) 209 210 __END_DECLS 211 212 #endif /* _UNISTD_H_ */ 213
