1 /* The <unistd.h> header contains a few miscellaneous manifest constants. */
6 /* Values used by access(). POSIX Table 2-6. */
7 #define F_OK 0 /* test if file exists */
8 #define X_OK 1 /* test if file is executable */
9 #define W_OK 2 /* test if file is writable */
10 #define R_OK 4 /* test if file is readable */
12 /* Values used for whence in lseek(fd, offset, whence). POSIX Table 2-7. */
13 #define SEEK_SET 0 /* offset is absolute */
14 #define SEEK_CUR 1 /* offset is relative to current position */
15 #define SEEK_END 2 /* offset is relative to end of file */
17 /* This value is required by POSIX Table 2-8. */
18 #define _POSIX_VERSION 198808L /* which standard is being conformed to */
20 /* These three definitions are required by POSIX Sec. 8.2.1.2. */
21 #define STDIN_FILENO 0 /* file descriptor for stdin */
22 #define STDOUT_FILENO 1 /* file descriptor for stdout */
23 #define STDERR_FILENO 2 /* file descriptor for stderr */
25 /* NULL must be defined in <unistd.h> according to POSIX Sec. 2.8.1. */
26 #define NULL ((void *)0)
28 /* The following relate to configurable system variables. POSIX Table 4-2. */
30 #define _SC_CHILD_MAX 2
31 #define _SC_CLOCKS_PER_SEC 3
32 #define _SC_NGROUPS_MAX 4
33 #define _SC_OPEN_MAX 5
34 #define _SC_JOB_CONTROL 6
35 #define _SC_SAVED_IDS 7
38 /* The following relate to configurable pathname variables. POSIX Table 5-2. */
39 #define _PC_LINK_MAX 1 /* link count */
40 #define _PC_MAX_CANON 2 /* size of the canonical input queue */
41 #define _PC_MAX_INPUT 3 /* type-ahead buffer size */
42 #define _PC_NAME_MAX 4 /* file name size */
43 #define _PC_PATH_MAX 5 /* pathname size */
44 #define _PC_PIPE_BUF 6 /* pipe size */
45 #define _PC_NO_TRUNC 7 /* treatment of long name components */
46 #define _PC_VDISABLE 8 /* tty disable */
47 #define _PC_CHOWN_RESTRICTED 9 /* chown restricted or not */
49 /* POSIX defines several options that may be implemented or not, at the
50 * implementer's whim. This implementer has made the following choices:
52 * _POSIX_JOB_CONTROL not defined: no job control
53 * _POSIX_SAVED_IDS not defined: no saved uid/gid
54 * _POSIX_NO_TRUNC not defined: long path names are truncated
55 * _POSIX_CHOWN_RESTRICTED defined: you can't give away files
56 * _POSIX_VDISABLE defined: tty functions can be disabled
58 #define _POSIX_CHOWN_RESTRICTED
59 #define _POSIX_VDISABLE '\t' /* can't set any control char to tab */
62 /* Function Prototypes. */
67 _PROTOTYPE( void _exit, (int _status) );
68 _PROTOTYPE( int access, (char *_path, int _amode) );
69 _PROTOTYPE( int chdir, (char *_path) );
70 _PROTOTYPE( int chown, (char *_path, int _owner, int _group) );
71 _PROTOTYPE( int close, (int _fd) );
72 _PROTOTYPE( char *ctermid, (char *_s) );
73 _PROTOTYPE( char *cuserid, (char *_s) );
74 _PROTOTYPE( int dup, (int _fd) );
75 _PROTOTYPE( int dup2, (int _fd, int _fd2) );
76 _PROTOTYPE( int execl, (char *_path, ...) );
77 _PROTOTYPE( int execle, (char *_path, ...) );
78 _PROTOTYPE( int execlp, (char *_file, ...) );
79 _PROTOTYPE( int execv, (char *_path, char *_argv[]) );
80 _PROTOTYPE( int execve, (char *_path, char *_argv[], char *_envp[]) );
81 _PROTOTYPE( int execvp, (char *_file, char *_argv[]) );
82 _PROTOTYPE( pid_t fork, (void) );
83 _PROTOTYPE( long fpathconf, (int _fd, int _name) );
84 _PROTOTYPE( char *getcwd, (char *_buf, int _size) );
85 _PROTOTYPE( gid_t getegid, (void) );
86 _PROTOTYPE( uid_t geteuid, (void) );
87 _PROTOTYPE( gid_t getgid, (void) );
88 _PROTOTYPE( int getgroups, (int _gidsetsize, gid_t _grouplist[]) );
89 _PROTOTYPE( char *getlogin, (void) );
90 _PROTOTYPE( pid_t getpgrp, (void) );
91 _PROTOTYPE( pid_t getpid, (void) );
92 _PROTOTYPE( pid_t getppid, (void) );
93 _PROTOTYPE( uid_t getuid, (void) );
94 _PROTOTYPE( unsigned int alarm, (unsigned int _seconds) );
95 _PROTOTYPE( unsigned int sleep, (unsigned int _seconds) );
96 _PROTOTYPE( int isatty, (int _fd) );
97 _PROTOTYPE( int link, (const char *_path1, const char *_path2) );
98 _PROTOTYPE( off_t lseek, (int _fd, off_t _offset, int _whence) );
99 _PROTOTYPE( long pathconf, (char *_path, int _name) );
100 _PROTOTYPE( int pause, (void) );
101 _PROTOTYPE( int pipe, (int _fildes[2]) );
102 _PROTOTYPE( int read, (int _fd, char *_buf, unsigned int _n) );
103 _PROTOTYPE( int rmdir, (const char *_path) );
104 _PROTOTYPE( int setgid, (int _gid) );
105 _PROTOTYPE( int setpgid, (pid_t _pid, pid_t _pgid) );
106 _PROTOTYPE( pid_t setsid, (void) );
107 _PROTOTYPE( int setuid, (int _uid) );
108 _PROTOTYPE( long sysconf, (int _name) );
109 _PROTOTYPE( pid_t tcgetpgrp, (int _fd) );
110 _PROTOTYPE( int tcsetpgrp, (int _fd, pid_t _pgrp_id) );
111 _PROTOTYPE( char *ttyname, (int _fd) );
112 _PROTOTYPE( int unlink, (const char *_path) );
113 _PROTOTYPE( int write, (int _fd, char *_buf, unsigned int _n) );
116 _PROTOTYPE( char *brk, (char *_addr) );
117 _PROTOTYPE( int mknod, (const char *_name, int _mode, int _addr) );
118 _PROTOTYPE( int mknod4, (const char *_name, int _mode, int _addr,
120 _PROTOTYPE( char *mktemp, (char *_template) );
121 _PROTOTYPE( char *sbrk, (int _incr) );
122 _PROTOTYPE( int chroot, (const char *_name) );
123 _PROTOTYPE( int mount, (char *_spec, char *_name, int _flag));
124 _PROTOTYPE( long ptrace, (int _req, int _pid, long _addr, long _data) );
125 _PROTOTYPE( int stime, (long *top) );
126 _PROTOTYPE( int sync, (void) );
127 _PROTOTYPE( int umount, (const char *_name) );
130 #endif /* _UNISTD_H */