2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1989, 1993
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8 * modification, are permitted provided that the following conditions
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32 #ifndef _SYS_UNISTD_H_
33 #define _SYS_UNISTD_H_
35 #include <sys/cdefs.h>
38 * POSIX options and option groups we unconditionally do or don't
39 * implement. Those options which are implemented (or not) entirely
40 * in user mode are defined in <unistd.h>. Please keep this list in
43 * Anything which is defined as zero below **must** have an
44 * implementation for the corresponding sysconf() which is able to
45 * determine conclusively whether or not the feature is supported.
46 * Anything which is defined as other than -1 below **must** have
47 * complete headers, types, and function declarations as specified by
48 * the POSIX standard; however, if the relevant sysconf() function
49 * returns -1, the functions may be stubbed out.
51 #define _POSIX_ADVISORY_INFO 200112L
52 #define _POSIX_ASYNCHRONOUS_IO 200112L
53 #define _POSIX_CHOWN_RESTRICTED 1
54 #define _POSIX_CLOCK_SELECTION (-1)
55 #define _POSIX_CPUTIME 200112L
56 #define _POSIX_FSYNC 200112L
58 #define _POSIX_JOB_CONTROL 1
59 #define _POSIX_MAPPED_FILES 200112L
60 #define _POSIX_MEMLOCK (-1)
61 #define _POSIX_MEMLOCK_RANGE 200112L
62 #define _POSIX_MEMORY_PROTECTION 200112L
63 #define _POSIX_MESSAGE_PASSING 200112L
64 #define _POSIX_MONOTONIC_CLOCK 200112L
65 #define _POSIX_NO_TRUNC 1
66 #define _POSIX_PRIORITIZED_IO (-1)
67 #define _POSIX_PRIORITY_SCHEDULING 0
68 #define _POSIX_RAW_SOCKETS 200112L
69 #define _POSIX_REALTIME_SIGNALS 200112L
70 #define _POSIX_SEMAPHORES 200112L
71 #define _POSIX_SHARED_MEMORY_OBJECTS 200112L
72 #define _POSIX_SPORADIC_SERVER (-1)
73 #define _POSIX_SYNCHRONIZED_IO (-1)
74 #define _POSIX_TIMEOUTS 200112L
75 #define _POSIX_TIMERS 200112L
76 #define _POSIX_TYPED_MEMORY_OBJECTS (-1)
77 #define _POSIX_VDISABLE 0xff
81 #define _XOPEN_STREAMS (-1)
85 * Although we have saved user/group IDs, we do not use them in setuid
86 * as described in POSIX 1003.1, because the feature does not work for
87 * root. We use the saved IDs in seteuid/setegid, which are not currently
88 * part of the POSIX 1003.1 specification. XXX revisit for 1003.1-2001
89 * as this is now mandatory.
92 #define _POSIX_SAVED_IDS 1 /* saved set-user-ID and set-group-ID */
95 /* Define the POSIX.1 version we target for compliance. */
96 #define _POSIX_VERSION 200112L
99 #define F_OK 0 /* test for existence of file */
100 #define X_OK 0x01 /* test for execute or search permission */
101 #define W_OK 0x02 /* test for write permission */
102 #define R_OK 0x04 /* test for read permission */
104 /* whence values for lseek(2) */
106 #define SEEK_SET 0 /* set file offset to offset */
107 #define SEEK_CUR 1 /* set file offset to current plus offset */
108 #define SEEK_END 2 /* set file offset to EOF plus offset */
111 #define SEEK_DATA 3 /* set file offset to next data past offset */
112 #define SEEK_HOLE 4 /* set file offset to next hole past offset */
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
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
133 #if __POSIX_VISIBLE >= 199309
134 #define _PC_ASYNC_IO 53
135 #define _PC_PRIO_IO 54
136 #define _PC_SYNC_IO 55
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
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 #define _PC_ACL_NFS4 64
156 #define _PC_DEALLOC_PRESENT 65
159 /* From OpenSolaris, used by SEEK_DATA/SEEK_HOLE. */
160 #define _PC_MIN_HOLE_SIZE 21
166 * XXX currently, some operations without RFPROC set are not supported.
168 #define RFNAMEG (1<<0) /* UNIMPL new plan9 `name space' */
169 #define RFENVG (1<<1) /* UNIMPL copy plan9 `env space' */
170 #define RFFDG (1<<2) /* copy fd table */
171 #define RFNOTEG (1<<3) /* UNIMPL create new plan9 `note group' */
172 #define RFPROC (1<<4) /* change child (else changes curproc) */
173 #define RFMEM (1<<5) /* share `address space' */
174 #define RFNOWAIT (1<<6) /* give child to init */
175 #define RFCNAMEG (1<<10) /* UNIMPL zero plan9 `name space' */
176 #define RFCENVG (1<<11) /* UNIMPL zero plan9 `env space' */
177 #define RFCFDG (1<<12) /* close all fds, zero fd table */
178 #define RFTHREAD (1<<13) /* enable kernel thread support */
179 #define RFSIGSHARE (1<<14) /* share signal handlers */
180 #define RFLINUXTHPN (1<<16) /* do linux clone exit parent notification */
181 #define RFSTOPPED (1<<17) /* leave child in a stopped state */
182 #define RFHIGHPID (1<<18) /* use a pid higher than 10 (idleproc) */
183 #define RFTSIGZMB (1<<19) /* select signal for exit parent notification */
184 #define RFTSIGSHIFT 20 /* selected signal number is in bits 20-27 */
185 #define RFTSIGMASK 0xFF
186 #define RFTSIGNUM(flags) (((flags) >> RFTSIGSHIFT) & RFTSIGMASK)
187 #define RFTSIGFLAGS(signum) ((signum) << RFTSIGSHIFT)
188 #define RFPROCDESC (1<<28) /* return a process descriptor */
189 /* kernel: parent sleeps until child exits (vfork) */
190 #define RFPPWAIT (1<<31)
191 /* user: vfork(2) semantics, clear signals */
192 #define RFSPAWN (1U<<31)
193 #define RFFLAGS (RFFDG | RFPROC | RFMEM | RFNOWAIT | RFCFDG | \
194 RFTHREAD | RFSIGSHARE | RFLINUXTHPN | RFSTOPPED | RFHIGHPID | RFTSIGZMB | \
195 RFPROCDESC | RFSPAWN | RFPPWAIT)
196 #define RFKERNELONLY (RFSTOPPED | RFHIGHPID | RFPROCDESC)
198 #define SWAPOFF_FORCE 0x00000001
201 * close_range() options.
203 #define CLOSE_RANGE_CLOEXEC (1<<2)
205 #endif /* __BSD_VISIBLE */
207 #endif /* !_SYS_UNISTD_H_ */