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
98
99 /* Macros for access() */
100 #define R_OK 4 /* Read */
101 #define W_OK 2 /* Write */
102 #define X_OK 1 /* Execute */
103 #define F_OK 0 /* Existence */
104
105 extern int access(const char *, int);
106 extern int link(const char *, const char *);
107 extern int unlink(const char *);
108 extern int chdir(const char *);
109 extern int fchdir(int);
110 extern int rmdir(const char *);
111 extern int pipe(int *);
112 extern int chroot(const char *);
113 extern int symlink(const char *, const char *);
114 extern int readlink(const char *, char *, size_t);
115 extern int chown(const char *, uid_t, gid_t);
116 extern int fchown(int, uid_t, gid_t);
117 extern int lchown(const char *, uid_t, gid_t);
118 extern int truncate(const char *, off_t);
119 extern char *getcwd(char *, size_t);
120
121 extern int sync(void);
122
123 extern int close(int);
124 extern off_t lseek(int, off_t, int);
125 extern off64_t lseek64(int, off64_t, int);
126
127 extern ssize_t read(int, void *, size_t);
128 extern ssize_t write(int, const void *, size_t);
129 extern ssize_t pread(int, void *, size_t, off_t);
130 extern ssize_t pwrite(int, const void *, size_t, off_t);
131
132 extern int dup(int);
133 extern int dup2(int, int);
134 extern int fcntl(int, int, ...);
135 extern int ioctl(int, int, ...);
136 extern int flock(int, int);
137 extern int fsync(int);
138 extern int ftruncate(int, off_t);
139
140 extern int pause(void);
141 extern unsigned int alarm(unsigned int);
142 extern unsigned int sleep(unsigned int);
143 extern void usleep(unsigned long);
144
145 extern int gethostname(char *, size_t);
146
147 extern int getdtablesize(void);
148
149 extern void *__brk(void *);
150 extern int brk(void *);
151 extern void *sbrk(ptrdiff_t);
152
153 extern int getopt(int, char * const *, const char *);
154 extern char *optarg;
155 extern int optind, opterr, optopt;
156
157 extern int isatty(int);
158 extern char* ttyname(int);
159
160 extern int acct(const char* filepath);
161
getpagesize(void)162 static __inline__ int getpagesize(void) {
163 return PAGE_SIZE;
164 }
165
166 long sysconf(int);
167
168 extern int daemon(int, int);
169
170 /* A special syscall that is only available on the ARM, not x86 function. */
171 extern int cacheflush(long start, long end, long flags);
172
173 extern pid_t tcgetpgrp(int fd);
174 extern int tcsetpgrp(int fd, pid_t _pid);
175
176 #if 0 /* MISSING FROM BIONIC */
177 extern pid_t getsid(pid_t);
178 extern int execvpe(const char *, char * const *, char * const *);
179 extern int execlpe(const char *, const char *, ...);
180 extern int getfsuid(uid_t);
181 extern int setfsuid(uid_t);
182 extern int fdatasync(int);
183 extern int getlogin_r(char* name, size_t namesize);
184 extern char* getusershell(void);
185 extern void setusershell(void);
186 extern void endusershell(void);
187 extern int sethostname(const char *, size_t);
188 extern int getdomainname(char *, size_t);
189 extern int setdomainname(const char *, size_t);
190 extern int ttyname_r(int, char*, size_t);
191 #endif /* MISSING */
192
193 /* Used to retry syscalls that can return EINTR. */
194 #define TEMP_FAILURE_RETRY(exp) ({ \
195 typeof (exp) _rc; \
196 do { \
197 _rc = (exp); \
198 } while (_rc == -1 && errno == EINTR); \
199 _rc; })
200
201 __END_DECLS
202
203 #endif /* _UNISTD_H_ */
204