FreeBSD/Linux Kernel Cross Reference
sys/sys/unistd.h
1 /*
2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. 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 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)unistd.h 8.2 (Berkeley) 1/7/94
34 * $FreeBSD: releng/5.0/sys/sys/unistd.h 106055 2002-10-27 18:03:02Z wollman $
35 */
36
37 #ifndef _SYS_UNISTD_H_
38 #define _SYS_UNISTD_H_
39
40 #include <sys/cdefs.h>
41
42 /*
43 * POSIX options and option groups we unconditionally do or don't
44 * implement. Those options which are implemented (or not) entirely
45 * in user mode are defined in <unistd.h>. Please keep this list in
46 * alphabetical order.
47 *
48 * Anything which is defined as zero below **must** have an
49 * implementation for the corresponding sysconf() which is able to
50 * determine conclusively whether or not the feature is supported.
51 * Anything which is defined as other than -1 below **must** have
52 * complete headers, types, and function declarations as specified by
53 * the POSIX standard; however, if the relevant sysconf() function
54 * returns -1, the functions may be stubbed out.
55 */
56 #define _POSIX_ADVISORY_INFO -1
57 #define _POSIX_ASYNCHRONOUS_IO 0
58 #define _POSIX_CHOWN_RESTRICTED 1
59 #define _POSIX_CLOCK_SELECTION -1
60 #define _POSIX_CPUTIME -1
61 #define _POSIX_FSYNC 200112L
62 #define _POSIX_IPV6 0
63 #define _POSIX_JOB_CONTROL 1
64 #define _POSIX_MAPPED_FILES 200112L
65 #define _POSIX_MEMLOCK -1
66 #define _POSIX_MEMLOCK_RANGE 200112L
67 #define _POSIX_MEMORY_PROTECTION 200112L
68 #define _POSIX_MESSAGE_PASSING -1
69 #define _POSIX_MONOTONIC_CLOCK -1
70 #define _POSIX_NO_TRUNC 1
71 #define _POSIX_PRIORITIZED_IO -1
72 #define _POSIX_PRIORITY_SCHEDULING 200112L
73 #define _POSIX_RAW_SOCKETS 200112L
74 #define _POSIX_REALTIME_SIGNALS -1
75 #define _POSIX_SEMAPHORES -1
76 #define _POSIX_SHARED_MEMORY_OBJECTS 200112L
77 #define _POSIX_SPORADIC_SERVER -1
78 #define _POSIX_SYNCHRONIZED_IO -1
79 #define _POSIX_TIMEOUTS -1
80 #define _POSIX_TYPED_MEMORY_OBJECTS -1
81 #define _POSIX_VDISABLE 0xff
82
83 #if __XSI_VISIBLE
84 #define _XOPEN_SHM 1
85 #define _XOPEN_STREAMS -1
86 #endif
87
88 /*
89 * Although we have saved user/group IDs, we do not use them in setuid
90 * as described in POSIX 1003.1, because the feature does not work for
91 * root. We use the saved IDs in seteuid/setegid, which are not currently
92 * part of the POSIX 1003.1 specification. XXX revisit for 1003.1-2001
93 * as this is now mandatory.
94 */
95 #ifdef _NOT_AVAILABLE
96 #define _POSIX_SAVED_IDS 1 /* saved set-user-ID and set-group-ID */
97 #endif
98
99 /* Define the POSIX.1 version we target for compliance. */
100 #define _POSIX_VERSION 200112L
101
102 /* access function */
103 #define F_OK 0 /* test for existence of file */
104 #define X_OK 0x01 /* test for execute or search permission */
105 #define W_OK 0x02 /* test for write permission */
106 #define R_OK 0x04 /* test for read permission */
107
108 /* whence values for lseek(2) */
109 #ifndef SEEK_SET
110 #define SEEK_SET 0 /* set file offset to offset */
111 #define SEEK_CUR 1 /* set file offset to current plus offset */
112 #define SEEK_END 2 /* set file offset to EOF plus offset */
113 #endif
114
115 #ifndef _POSIX_SOURCE
116 /* whence values for lseek(2); renamed by POSIX 1003.1 */
117 #define L_SET SEEK_SET
118 #define L_INCR SEEK_CUR
119 #define L_XTND SEEK_END
120 #endif
121
122 /* configurable pathname variables */
123 #define _PC_LINK_MAX 1
124 #define _PC_MAX_CANON 2
125 #define _PC_MAX_INPUT 3
126 #define _PC_NAME_MAX 4
127 #define _PC_PATH_MAX 5
128 #define _PC_PIPE_BUF 6
129 #define _PC_CHOWN_RESTRICTED 7
130 #define _PC_NO_TRUNC 8
131 #define _PC_VDISABLE 9
132
133 #if __POSIX_VISIBLE >= 199309
134 #define _PC_ASYNC_IO 53
135 #define _PC_PRIO_IO 54
136 #define _PC_SYNC_IO 55
137 #endif
138
139 #if __POSIX_VISIBLE >= 200112
140 #define _PC_ALLOC_SIZE_MIN 10
141 #define _PC_FILESIZEBITS 12
142 #define _PC_REC_INCR_XFER_SIZE 14
143 #define _PC_REC_MAX_XFER_SIZE 15
144 #define _PC_REC_MIN_XFER_SIZE 16
145 #define _PC_REC_XFER_ALIGN 17
146 #define _PC_SYMLINK_MAX 18
147 #endif
148
149 #if __BSD_VISIBLE
150 #define _PC_ACL_EXTENDED 59
151 #define _PC_ACL_PATH_MAX 60
152 #define _PC_CAP_PRESENT 61
153 #define _PC_INF_PRESENT 62
154 #define _PC_MAC_PRESENT 63
155 #endif
156
157 #if __BSD_VISIBLE
158 /*
159 * rfork() options.
160 *
161 * XXX currently, some operations without RFPROC set are not supported.
162 */
163 #define RFNAMEG (1<<0) /* UNIMPL new plan9 `name space' */
164 #define RFENVG (1<<1) /* UNIMPL copy plan9 `env space' */
165 #define RFFDG (1<<2) /* copy fd table */
166 #define RFNOTEG (1<<3) /* UNIMPL create new plan9 `note group' */
167 #define RFPROC (1<<4) /* change child (else changes curproc) */
168 #define RFMEM (1<<5) /* share `address space' */
169 #define RFNOWAIT (1<<6) /* give child to init */
170 #define RFCNAMEG (1<<10) /* UNIMPL zero plan9 `name space' */
171 #define RFCENVG (1<<11) /* UNIMPL zero plan9 `env space' */
172 #define RFCFDG (1<<12) /* close all fds, zero fd table */
173 #define RFTHREAD (1<<13) /* enable kernel thread support */
174 #define RFSIGSHARE (1<<14) /* share signal handlers */
175 #define RFLINUXTHPN (1<<16) /* do linux clone exit parent notification */
176 #define RFSTOPPED (1<<17) /* leave child in a stopped state */
177 #define RFHIGHPID (1<<18) /* use a pid higher then 10 (idleproc) */
178 #define RFPPWAIT (1<<31) /* parent sleeps until child exits (vfork) */
179 #define RFKERNELONLY (RFSTOPPED | RFHIGHPID | RFPPWAIT)
180
181 #endif /* __BSD_VISIBLE */
182
183 #endif /* !_SYS_UNISTD_H_ */
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