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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      @(#)unistd.h    8.2 (Berkeley) 1/7/94
  30  * $FreeBSD: src/sys/sys/unistd.h,v 1.50 2009/01/31 10:04:36 trhodes Exp $
  31  */
  32
  33 #ifndef _SYS_UNISTD_H_
  34 #define _SYS_UNISTD_H_
  35
  36 #include <sys/cdefs.h>
  37 #include <sys/types.h>
  38
  39 /*
  40  * POSIX options and option groups we unconditionally do or don't
  41  * implement.  Those options which are implemented (or not) entirely
  42  * in user mode are defined in <unistd.h>.  Please keep this list in
  43  * alphabetical order.
  44  *
  45  * Anything which is defined as zero below **must** have an
  46  * implementation for the corresponding sysconf() which is able to
  47  * determine conclusively whether or not the feature is supported.
  48  * Anything which is defined as other than -1 below **must** have
  49  * complete headers, types, and function declarations as specified by
  50  * the POSIX standard; however, if the relevant sysconf() function
  51  * returns -1, the functions may be stubbed out.
  52  */
  53 #define _POSIX_ADVISORY_INFO            -1      /* [ADV] */
  54 #define _POSIX_ASYNCHRONOUS_IO          0       /* mandatory */
  55 #define _POSIX_BARRIERS                 200112L /* mandatory */
  56 #define _POSIX_CHOWN_RESTRICTED         1
  57 #define _POSIX_CLOCK_SELECTION          -1      /* XXX mandatory */
  58 #define _POSIX_CPUTIME                  200112L /* [CPT] */
  59 #define _POSIX_FSYNC                    200112L /* [FSC] */
  60 #define _POSIX_IPV6                     0
  61 #define _POSIX_JOB_CONTROL              1       /* mandatory */
  62 #define _POSIX_MAPPED_FILES             200112L /* mandatory */
  63 #define _POSIX_MEMLOCK                  -1      /* [ML] */
  64 #define _POSIX_MEMLOCK_RANGE            200112L /* [MLR] */
  65 #define _POSIX_MEMORY_PROTECTION        200112L /* mandatory */
  66 #define _POSIX_MESSAGE_PASSING          200112L /* [MSG] */
  67 #define _POSIX_MONOTONIC_CLOCK          200112L /* [MON] */
  68 #define _POSIX_NO_TRUNC                 1
  69 #define _POSIX_PRIORITIZED_IO           -1      /* [PIO] */
  70 #define _POSIX_PRIORITY_SCHEDULING      200112L /* [PS] */
  71 #define _POSIX_RAW_SOCKETS              200112L /* [RS] */
  72 #define _POSIX_REALTIME_SIGNALS         200112L /* mandatory */
  73 #define _POSIX_SEMAPHORES               200112L /* mandatory */
  74 #define _POSIX_SHARED_MEMORY_OBJECTS    200112L /* [SHM] */
  75 #define _POSIX_SPIN_LOCKS               200112L /* mandatory */
  76 #define _POSIX_SPORADIC_SERVER          -1      /* [SS] */
  77 #define _POSIX_SYNCHRONIZED_IO          -1      /* [SIO] */
  78 #define _POSIX_THREAD_CPUTIME           200112L /* [TCT] */
  79 #define _POSIX_TIMEOUTS                 200112L /* mandatory */
  80 #define _POSIX_TIMERS                   200112L /* mandatory */
  81 #define _POSIX_TYPED_MEMORY_OBJECTS     -1      /* [TYM] */
  82 #define _POSIX_VDISABLE                 0xff
  83
  84 #if __XSI_VISIBLE
  85 #define _XOPEN_SHM                      1
  86 #define _XOPEN_STREAMS                  -1
  87 #endif
  88
  89 /*
  90  * Although we have saved user/group IDs, we do not use them in setuid
  91  * as described in POSIX 1003.1, because the feature does not work for
  92  * root.  We use the saved IDs in seteuid/setegid, which are not currently
  93  * part of the POSIX 1003.1 specification.  See comments in kern_prot.c.
  94  *
  95  * XXX revisit for 1003.1-2008 as this is now mandatory since 1003.1-2001.
  96  */
  97 #if 0
  98 #define _POSIX_SAVED_IDS        1 /* saved set-user-ID and set-group-ID */
  99 #endif
 100
 101 /* Define the POSIX.1 version we target for compliance. */
 102 #ifndef _POSIX_VERSION
 103 #define _POSIX_VERSION          200112L
 104 #endif
 105
 106 /* access function */
 107 #define F_OK            0       /* test for existence of file */
 108 #define X_OK            0x01    /* test for execute or search permission */
 109 #define W_OK            0x02    /* test for write permission */
 110 #define R_OK            0x04    /* test for read permission */
 111
 112 /*
 113  * whence values for lseek(2)
 114  * Always ensure that these are consistent with <fcntl.h> and <stdio.h>!
 115  */
 116 #ifndef SEEK_SET
 117 #define SEEK_SET        0       /* set file offset to offset */
 118 #endif
 119 #ifndef SEEK_CUR
 120 #define SEEK_CUR        1       /* set file offset to current plus offset */
 121 #endif
 122 #ifndef SEEK_END
 123 #define SEEK_END        2       /* set file offset to EOF plus offset */
 124 #endif
 125 #if __BSD_VISIBLE
 126 #define SEEK_DATA       3       /* set file offset to next data past offset */
 127 #define SEEK_HOLE       4       /* set file offset to next hole past offset */
 128
 129 /* whence values for lseek(2); renamed by POSIX 1003.1 */
 130 #define L_SET           SEEK_SET
 131 #define L_INCR          SEEK_CUR
 132 #define L_XTND          SEEK_END
 133 #endif
 134
 135 /* configurable pathname variables */
 136 #define _PC_LINK_MAX             1
 137 #define _PC_MAX_CANON            2
 138 #define _PC_MAX_INPUT            3
 139 #define _PC_NAME_MAX             4
 140 #define _PC_PATH_MAX             5
 141 #define _PC_PIPE_BUF             6
 142 #define _PC_CHOWN_RESTRICTED     7
 143 #define _PC_NO_TRUNC             8
 144 #define _PC_VDISABLE             9
 145
 146 #if __POSIX_VISIBLE >= 199309
 147 #define _PC_ASYNC_IO            53
 148 #define _PC_PRIO_IO             54
 149 #define _PC_SYNC_IO             55
 150 #endif
 151
 152 #if __POSIX_VISIBLE >= 200112
 153 #define _PC_ALLOC_SIZE_MIN      10
 154 #define _PC_FILESIZEBITS        12
 155 #define _PC_REC_INCR_XFER_SIZE  14
 156 #define _PC_REC_MAX_XFER_SIZE   15
 157 #define _PC_REC_MIN_XFER_SIZE   16
 158 #define _PC_REC_XFER_ALIGN      17
 159 #define _PC_SYMLINK_MAX         18
 160 #endif
 161
 162 #if __POSIX_VISIBLE >= 200809
 163 #define _PC_2_SYMLINKS          22
 164 #define _PC_TIMESTAMP_RESOLUTION 23
 165 #endif
 166
 167 #if __BSD_VISIBLE
 168 #define _PC_ACL_EXTENDED        59
 169 #define _PC_ACL_PATH_MAX        60
 170 #define _PC_CAP_PRESENT         61
 171 #define _PC_INF_PRESENT         62
 172 #define _PC_MAC_PRESENT         63
 173 #endif
 174
 175 /* From OpenSolaris, used by SEEK_DATA/SEEK_HOLE. */
 176 #define _PC_MIN_HOLE_SIZE       21
 177
 178 #if __BSD_VISIBLE
 179 /*
 180  * rfork() options.
 181  *
 182  * XXX currently, operations without RFPROC set are not supported.
 183  */
 184 #define RFNAMEG         (1<<0)  /* UNIMPL new plan9 `name space' */
 185 #define RFENVG          (1<<1)  /* UNIMPL copy plan9 `env space' */
 186 #define RFFDG           (1<<2)  /* copy fd table */
 187 #define RFNOTEG         (1<<3)  /* UNIMPL create new plan9 `note group' */
 188 #define RFPROC          (1<<4)  /* change child (else changes curproc) */
 189 #define RFMEM           (1<<5)  /* share `address space' */
 190 #define RFNOWAIT        (1<<6)  /* parent need not wait() on child */
 191 #define RFCNAMEG        (1<<10) /* UNIMPL zero plan9 `name space' */
 192 #define RFCENVG         (1<<11) /* UNIMPL zero plan9 `env space' */
 193 #define RFCFDG          (1<<12) /* zero fd table */
 194 #define RFTHREAD        (1<<13) /* enable kernel thread support */
 195 #define RFSIGSHARE      (1<<14) /* share signal handlers */
 196 #define RFLINUXTHPN     (1<<16) /* do linux clone exit parent notification */
 197 #define RFPGLOCK        (1<<30) /* process group interlock for signal race */
 198 #define RFPPWAIT        (1<<31) /* parent sleeps until child exits (vfork) */
 199 #define RFKERNELONLY    (RFPGLOCK | RFPPWAIT)
 200
 201 /*
 202  * Extended exit extexit() operation modes.
 203  */
 204 /* Types of action to communicate exit */
 205 #define EXTEXIT_SIMPLE  0
 206 #define EXTEXIT_SETINT  1
 207 #define EXTEXIT_ACTION(f) ((f) & 0xffff)
 208 /* Types describing what to exit */
 209 #define EXTEXIT_PROC    (0<<16)
 210 #define EXTEXIT_LWP     (1<<16)
 211 #define EXTEXIT_WHO(f)  ((f) & (0xffff<<16))
 212
 213 #endif /* __BSD_VISIBLE */
 214
 215 #endif /* !_SYS_UNISTD_H_ */