The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/unistd.h

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    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  * 4. 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  * $FreeBSD$
   31  */
   32 
   33 #ifndef _SYS_UNISTD_H_
   34 #define _SYS_UNISTD_H_
   35 
   36 #include <sys/cdefs.h>
   37 
   38 /*
   39  * POSIX options and option groups we unconditionally do or don't
   40  * implement.  Those options which are implemented (or not) entirely
   41  * in user mode are defined in <unistd.h>.  Please keep this list in
   42  * alphabetical order.
   43  *
   44  * Anything which is defined as zero below **must** have an
   45  * implementation for the corresponding sysconf() which is able to
   46  * determine conclusively whether or not the feature is supported.
   47  * Anything which is defined as other than -1 below **must** have
   48  * complete headers, types, and function declarations as specified by
   49  * the POSIX standard; however, if the relevant sysconf() function
   50  * returns -1, the functions may be stubbed out.
   51  */
   52 #define _POSIX_ADVISORY_INFO            -1
   53 #define _POSIX_ASYNCHRONOUS_IO          0
   54 #define _POSIX_CHOWN_RESTRICTED         1
   55 #define _POSIX_CLOCK_SELECTION          -1
   56 #define _POSIX_CPUTIME                  -1
   57 #define _POSIX_FSYNC                    200112L
   58 #define _POSIX_IPV6                     0
   59 #define _POSIX_JOB_CONTROL              1
   60 #define _POSIX_MAPPED_FILES             200112L
   61 #define _POSIX_MEMLOCK                  -1
   62 #define _POSIX_MEMLOCK_RANGE            200112L
   63 #define _POSIX_MEMORY_PROTECTION        200112L
   64 #define _POSIX_MESSAGE_PASSING          -1
   65 #define _POSIX_MONOTONIC_CLOCK          -1
   66 #define _POSIX_NO_TRUNC                 1
   67 #define _POSIX_PRIORITIZED_IO           -1
   68 #define _POSIX_PRIORITY_SCHEDULING      200112L
   69 #define _POSIX_RAW_SOCKETS              200112L
   70 #define _POSIX_REALTIME_SIGNALS         -1
   71 #define _POSIX_SEMAPHORES               -1
   72 #define _POSIX_SHARED_MEMORY_OBJECTS    200112L
   73 #define _POSIX_SPORADIC_SERVER          -1
   74 #define _POSIX_SYNCHRONIZED_IO          -1
   75 #define _POSIX_TIMEOUTS                 -1
   76 #define _POSIX_TYPED_MEMORY_OBJECTS     -1
   77 #define _POSIX_VDISABLE                 0xff
   78 
   79 #if __XSI_VISIBLE
   80 #define _XOPEN_SHM                      1
   81 #define _XOPEN_STREAMS                  -1
   82 #endif
   83 
   84 /*
   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.
   90  */
   91 #ifdef  _NOT_AVAILABLE
   92 #define _POSIX_SAVED_IDS        1 /* saved set-user-ID and set-group-ID */
   93 #endif
   94 
   95 /* Define the POSIX.1 version we target for compliance. */
   96 #define _POSIX_VERSION          200112L
   97 
   98 /* access function */
   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 */
  103 
  104 /* whence values for lseek(2) */
  105 #ifndef SEEK_SET
  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 */
  109 #endif
  110 
  111 #ifndef _POSIX_SOURCE
  112 /* whence values for lseek(2); renamed by POSIX 1003.1 */
  113 #define L_SET           SEEK_SET
  114 #define L_INCR          SEEK_CUR
  115 #define L_XTND          SEEK_END
  116 #endif
  117 
  118 /* configurable pathname variables */
  119 #define _PC_LINK_MAX             1
  120 #define _PC_MAX_CANON            2
  121 #define _PC_MAX_INPUT            3
  122 #define _PC_NAME_MAX             4
  123 #define _PC_PATH_MAX             5
  124 #define _PC_PIPE_BUF             6
  125 #define _PC_CHOWN_RESTRICTED     7
  126 #define _PC_NO_TRUNC             8
  127 #define _PC_VDISABLE             9
  128 
  129 #if __POSIX_VISIBLE >= 199309
  130 #define _PC_ASYNC_IO            53
  131 #define _PC_PRIO_IO             54
  132 #define _PC_SYNC_IO             55
  133 #endif
  134 
  135 #if __POSIX_VISIBLE >= 200112
  136 #define _PC_ALLOC_SIZE_MIN      10
  137 #define _PC_FILESIZEBITS        12
  138 #define _PC_REC_INCR_XFER_SIZE  14
  139 #define _PC_REC_MAX_XFER_SIZE   15
  140 #define _PC_REC_MIN_XFER_SIZE   16
  141 #define _PC_REC_XFER_ALIGN      17
  142 #define _PC_SYMLINK_MAX         18
  143 #endif
  144 
  145 #if __BSD_VISIBLE
  146 #define _PC_ACL_EXTENDED        59
  147 #define _PC_ACL_PATH_MAX        60
  148 #define _PC_CAP_PRESENT         61
  149 #define _PC_INF_PRESENT         62
  150 #define _PC_MAC_PRESENT         63
  151 #endif
  152 
  153 #if __BSD_VISIBLE
  154 /*
  155  * rfork() options.
  156  *
  157  * XXX currently, some operations without RFPROC set are not supported.
  158  */
  159 #define RFNAMEG         (1<<0)  /* UNIMPL new plan9 `name space' */
  160 #define RFENVG          (1<<1)  /* UNIMPL copy plan9 `env space' */
  161 #define RFFDG           (1<<2)  /* copy fd table */
  162 #define RFNOTEG         (1<<3)  /* UNIMPL create new plan9 `note group' */
  163 #define RFPROC          (1<<4)  /* change child (else changes curproc) */
  164 #define RFMEM           (1<<5)  /* share `address space' */
  165 #define RFNOWAIT        (1<<6)  /* give child to init */
  166 #define RFCNAMEG        (1<<10) /* UNIMPL zero plan9 `name space' */
  167 #define RFCENVG         (1<<11) /* UNIMPL zero plan9 `env space' */
  168 #define RFCFDG          (1<<12) /* close all fds, zero fd table */
  169 #define RFTHREAD        (1<<13) /* enable kernel thread support */
  170 #define RFSIGSHARE      (1<<14) /* share signal handlers */
  171 #define RFLINUXTHPN     (1<<16) /* do linux clone exit parent notification */
  172 #define RFSTOPPED       (1<<17) /* leave child in a stopped state */
  173 #define RFHIGHPID       (1<<18) /* use a pid higher then 10 (idleproc) */
  174 #define RFPPWAIT        (1<<31) /* parent sleeps until child exits (vfork) */
  175 #define RFKERNELONLY    (RFSTOPPED | RFHIGHPID | RFPPWAIT)
  176 
  177 #endif /* __BSD_VISIBLE */
  178 
  179 #endif /* !_SYS_UNISTD_H_ */

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