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
29 #ifndef _UNISTD_H_
30 #define _UNISTD_H_
31
32 #include <stddef.h>
33 #include <sys/cdefs.h>
34 #include <sys/types.h>
35 #include <sys/select.h>
36
37 #include <bits/fcntl.h>
38 #include <bits/getopt.h>
39 #include <bits/ioctl.h>
40 #include <bits/lockf.h>
41 #include <bits/posix_limits.h>
42 #include <bits/seek_constants.h>
43 #include <bits/sysconf.h>
44
45 __BEGIN_DECLS
46
47 #define STDIN_FILENO 0
48 #define STDOUT_FILENO 1
49 #define STDERR_FILENO 2
50
51 #define F_OK 0
52 #define X_OK 1
53 #define W_OK 2
54 #define R_OK 4
55
56 #define _PC_FILESIZEBITS 0
57 #define _PC_LINK_MAX 1
58 #define _PC_MAX_CANON 2
59 #define _PC_MAX_INPUT 3
60 #define _PC_NAME_MAX 4
61 #define _PC_PATH_MAX 5
62 #define _PC_PIPE_BUF 6
63 #define _PC_2_SYMLINKS 7
64 #define _PC_ALLOC_SIZE_MIN 8
65 #define _PC_REC_INCR_XFER_SIZE 9
66 #define _PC_REC_MAX_XFER_SIZE 10
67 #define _PC_REC_MIN_XFER_SIZE 11
68 #define _PC_REC_XFER_ALIGN 12
69 #define _PC_SYMLINK_MAX 13
70 #define _PC_CHOWN_RESTRICTED 14
71 #define _PC_NO_TRUNC 15
72 #define _PC_VDISABLE 16
73 #define _PC_ASYNC_IO 17
74 #define _PC_PRIO_IO 18
75 #define _PC_SYNC_IO 19
76
77 extern char** environ;
78
79 __noreturn void _exit(int __status);
80
81 pid_t fork(void);
82 pid_t vfork(void);
83 pid_t getpid(void);
84 pid_t gettid(void) __attribute_const__;
85 pid_t getpgid(pid_t __pid);
86 int setpgid(pid_t __pid, pid_t __pgid);
87 pid_t getppid(void);
88 pid_t getpgrp(void);
89 int setpgrp(void);
90 pid_t getsid(pid_t __pid) __INTRODUCED_IN(17);
91 pid_t setsid(void);
92
93 int execv(const char* __path, char* const* __argv);
94 int execvp(const char* __file, char* const* __argv);
95 int execvpe(const char* __file, char* const* __argv, char* const* __envp) __INTRODUCED_IN(21);
96 int execve(const char* __file, char* const* __argv, char* const* __envp);
97 int execl(const char* __path, const char* __arg0, ...) __attribute__((__sentinel__));
98 int execlp(const char* __file, const char* __arg0, ...) __attribute__((__sentinel__));
99 int execle(const char* __path, const char* __arg0, ... /*, char* const* __envp */)
100 __attribute__((__sentinel__(1)));
101 int fexecve(int __fd, char* const* __argv, char* const* __envp) __INTRODUCED_IN(28);
102
103 int nice(int __incr);
104
105 int setuid(uid_t __uid);
106 uid_t getuid(void);
107 int seteuid(uid_t __uid);
108 uid_t geteuid(void);
109 int setgid(gid_t __gid);
110 gid_t getgid(void);
111 int setegid(gid_t __gid);
112 gid_t getegid(void);
113 int getgroups(int __size, gid_t* __list);
114 int setgroups(size_t __size, const gid_t* __list);
115 int setreuid(uid_t __ruid, uid_t __euid);
116 int setregid(gid_t __rgid, gid_t __egid);
117 int setresuid(uid_t __ruid, uid_t __euid, uid_t __suid);
118 int setresgid(gid_t __rgid, gid_t __egid, gid_t __sgid);
119 int getresuid(uid_t* __ruid, uid_t* __euid, uid_t* __suid);
120 int getresgid(gid_t* __rgid, gid_t* __egid, gid_t* __sgid);
121 char* getlogin(void);
122 int getlogin_r(char* __buffer, size_t __buffer_size) __INTRODUCED_IN(28);
123
124 long fpathconf(int __fd, int __name);
125 long pathconf(const char* __path, int __name);
126
127 int access(const char* __path, int __mode);
128 int faccessat(int __dirfd, const char* __path, int __mode, int __flags) __INTRODUCED_IN(16);
129 int link(const char* __old_path, const char* __new_path);
130 int linkat(int __old_dir_fd, const char* __old_path, int __new_dir_fd, const char* __new_path, int __flags) __INTRODUCED_IN(21);
131 int unlink(const char* __path);
132 int unlinkat(int __dirfd, const char* __path, int __flags);
133 int chdir(const char* __path);
134 int fchdir(int __fd);
135 int rmdir(const char* __path);
136 int pipe(int __fds[2]);
137 #if defined(__USE_GNU)
138 int pipe2(int __fds[2], int __flags) __INTRODUCED_IN(9);
139 #endif
140 int chroot(const char* __path);
141 int symlink(const char* __old_path, const char* __new_path);
142 int symlinkat(const char* __old_path, int __new_dir_fd, const char* __new_path) __INTRODUCED_IN(21);
143 ssize_t readlink(const char* __path, char* __buf, size_t __buf_size);
144 ssize_t readlinkat(int __dir_fd, const char* __path, char* __buf, size_t __buf_size)
145 __INTRODUCED_IN(21);
146 int chown(const char* __path, uid_t __owner, gid_t __group);
147 int fchown(int __fd, uid_t __owner, gid_t __group);
148 int fchownat(int __dir_fd, const char* __path, uid_t __owner, gid_t __group, int __flags);
149 int lchown(const char* __path, uid_t __owner, gid_t __group);
150 char* getcwd(char* __buf, size_t __size);
151
152 void sync(void);
153 #if defined(__USE_GNU)
154 int syncfs(int __fd) __INTRODUCED_IN(28);
155 #endif
156
157 int close(int __fd);
158
159 ssize_t read(int __fd, void* __buf, size_t __count);
160 ssize_t write(int __fd, const void* __buf, size_t __count);
161
162 int dup(int __old_fd);
163 int dup2(int __old_fd, int __new_fd);
164 int dup3(int __old_fd, int __new_fd, int __flags) __INTRODUCED_IN(21);
165 int fsync(int __fd);
166 int fdatasync(int __fd) __INTRODUCED_IN(9);
167
168 /* See https://android.googlesource.com/platform/bionic/+/master/docs/32-bit-abi.md */
169 #if defined(__USE_FILE_OFFSET64)
170 int truncate(const char* __path, off_t __length) __RENAME(truncate64) __INTRODUCED_IN(21);
171 off_t lseek(int __fd, off_t __offset, int __whence) __RENAME(lseek64);
172 ssize_t pread(int __fd, void* __buf, size_t __count, off_t __offset)
173 __RENAME(pread64) __INTRODUCED_IN(12);
174 ssize_t pwrite(int __fd, const void* __buf, size_t __count, off_t __offset)
175 __RENAME(pwrite64) __INTRODUCED_IN(12);
176 int ftruncate(int __fd, off_t __length) __RENAME(ftruncate64) __INTRODUCED_IN(12);
177 #else
178 int truncate(const char* __path, off_t __length);
179 off_t lseek(int __fd, off_t __offset, int __whence);
180 ssize_t pread(int __fd, void* __buf, size_t __count, off_t __offset);
181 ssize_t pwrite(int __fd, const void* __buf, size_t __count, off_t __offset);
182 int ftruncate(int __fd, off_t __length);
183 #endif
184
185 int truncate64(const char* __path, off64_t __length) __INTRODUCED_IN(21);
186 off64_t lseek64(int __fd, off64_t __offset, int __whence);
187 ssize_t pread64(int __fd, void* __buf, size_t __count, off64_t __offset) __INTRODUCED_IN(12);
188 ssize_t pwrite64(int __fd, const void* __buf, size_t __count, off64_t __offset) __INTRODUCED_IN(12);
189 int ftruncate64(int __fd, off64_t __length) __INTRODUCED_IN(12);
190
191 int pause(void);
192 unsigned int alarm(unsigned int __seconds);
193 unsigned int sleep(unsigned int __seconds);
194 int usleep(useconds_t __microseconds);
195
196 int gethostname(char* __buf, size_t __buf_size);
197 int sethostname(const char* __name, size_t __n) __INTRODUCED_IN(23);
198
199 int brk(void* __addr);
200 void* sbrk(ptrdiff_t __increment);
201
202 int isatty(int __fd);
203 char* ttyname(int __fd);
204 int ttyname_r(int __fd, char* __buf, size_t __buf_size) __INTRODUCED_IN(8);
205
206 int acct(const char* __path);
207
208 #if __ANDROID_API__ >= __ANDROID_API_L__
209 int getpagesize(void) __INTRODUCED_IN(21);
210 #else
getpagesize(void)211 static __inline__ int getpagesize(void) {
212 return sysconf(_SC_PAGESIZE);
213 }
214 #endif
215
216 long syscall(long __number, ...);
217
218 int daemon(int __no_chdir, int __no_close);
219
220 #if defined(__arm__) || (defined(__mips__) && !defined(__LP64__))
221 int cacheflush(long __addr, long __nbytes, long __cache);
222 /* __attribute__((deprecated("use __builtin___clear_cache instead"))); */
223 #endif
224
225 pid_t tcgetpgrp(int __fd);
226 int tcsetpgrp(int __fd, pid_t __pid);
227
228 /* Used to retry syscalls that can return EINTR. */
229 #define TEMP_FAILURE_RETRY(exp) ({ \
230 __typeof__(exp) _rc; \
231 do { \
232 _rc = (exp); \
233 } while (_rc == -1 && errno == EINTR); \
234 _rc; })
235
236 int getdomainname(char* __buf, size_t __buf_size) __INTRODUCED_IN(26);
237 int setdomainname(const char* __name, size_t __n) __INTRODUCED_IN(26);
238
239 void swab(const void* __src, void* __dst, ssize_t __byte_count) __INTRODUCED_IN(28);
240
241 #if defined(__BIONIC_INCLUDE_FORTIFY_HEADERS)
242 #include <bits/fortify/unistd.h>
243 #endif
244
245 __END_DECLS
246
247 #endif
248