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: src/sys/sys/unistd.h,v 1.50 2009/01/31 10:04:36 trhodes Exp $
   31  * $DragonFly: src/sys/sys/unistd.h,v 1.10 2008/09/22 09:13:21 hasso Exp $
   32  */
   33 
   34 #ifndef _SYS_UNISTD_H_
   35 #define _SYS_UNISTD_H_
   36 
   37 #include <sys/cdefs.h>
   38 #include <sys/types.h>
   39 
   40 /*
   41  * POSIX options and option groups we unconditionally do or don't
   42  * implement.  Those options which are implemented (or not) entirely
   43  * in user mode are defined in <unistd.h>.  Please keep this list in
   44  * alphabetical order.
   45  *
   46  * Anything which is defined as zero below **must** have an
   47  * implementation for the corresponding sysconf() which is able to
   48  * determine conclusively whether or not the feature is supported.
   49  * Anything which is defined as other than -1 below **must** have
   50  * complete headers, types, and function declarations as specified by
   51  * the POSIX standard; however, if the relevant sysconf() function
   52  * returns -1, the functions may be stubbed out.
   53  */
   54 #define _POSIX_ADVISORY_INFO            -1
   55 #define _POSIX_ASYNCHRONOUS_IO          0
   56 #define _POSIX_BARRIERS                 200112L
   57 #define _POSIX_CHOWN_RESTRICTED         1
   58 #define _POSIX_CLOCK_SELECTION          -1
   59 #define _POSIX_CPUTIME                  -1
   60 #define _POSIX_FSYNC                    200112L
   61 #define _POSIX_IPV6                     0
   62 #define _POSIX_JOB_CONTROL              1
   63 #define _POSIX_MAPPED_FILES             200112L
   64 #define _POSIX_MEMLOCK                  -1
   65 #define _POSIX_MEMLOCK_RANGE            200112L
   66 #define _POSIX_MEMORY_PROTECTION        200112L
   67 #define _POSIX_MESSAGE_PASSING          200112L
   68 #define _POSIX_MONOTONIC_CLOCK          200112L
   69 #define _POSIX_NO_TRUNC                 1
   70 #define _POSIX_PRIORITIZED_IO           -1
   71 #define _POSIX_PRIORITY_SCHEDULING      200112L
   72 #define _POSIX_RAW_SOCKETS              200112L
   73 #define _POSIX_REALTIME_SIGNALS         200112L
   74 #define _POSIX_SEMAPHORES               -1
   75 #define _POSIX_SHARED_MEMORY_OBJECTS    200112L
   76 #define _POSIX_SPIN_LOCKS               200112L
   77 #define _POSIX_SPORADIC_SERVER          -1
   78 #define _POSIX_SYNCHRONIZED_IO          -1
   79 #define _POSIX_TIMEOUTS                 200112L
   80 #define _POSIX_TIMERS                   200112L
   81 #define _POSIX_TYPED_MEMORY_OBJECTS     -1
   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.  XXX revisit for 1003.1-2001
   94  * as this is now mandatory.
   95  */
   96 #ifdef _NOT_AVAILABLE
   97 #define _POSIX_SAVED_IDS        1 /* saved set-user-ID and set-group-ID */
   98 #endif
   99 
  100 /* Define the POSIX.1 version we target for compliance. */
  101 #ifndef _POSIX_VERSION
  102 #define _POSIX_VERSION          200112L
  103 #endif
  104 
  105 /* access function */
  106 #define F_OK            0       /* test for existence of file */
  107 #define X_OK            0x01    /* test for execute or search permission */
  108 #define W_OK            0x02    /* test for write permission */
  109 #define R_OK            0x04    /* test for read permission */
  110 
  111 /* whence values for lseek(2) */
  112 #ifndef SEEK_SET
  113 #define SEEK_SET        0       /* set file offset to offset */
  114 #define SEEK_CUR        1       /* set file offset to current plus offset */
  115 #define SEEK_END        2       /* set file offset to EOF plus offset */
  116 #endif
  117 #if __BSD_VISIBLE
  118 #define SEEK_DATA       3       /* set file offset to next data past offset */
  119 #define SEEK_HOLE       4       /* set file offset to next hole past offset */
  120 #endif
  121 
  122 #ifndef _POSIX_SOURCE
  123 /* whence values for lseek(2); renamed by POSIX 1003.1 */
  124 #define L_SET           SEEK_SET
  125 #define L_INCR          SEEK_CUR
  126 #define L_XTND          SEEK_END
  127 #endif
  128 
  129 /* configurable pathname variables */
  130 #define _PC_LINK_MAX             1
  131 #define _PC_MAX_CANON            2
  132 #define _PC_MAX_INPUT            3
  133 #define _PC_NAME_MAX             4
  134 #define _PC_PATH_MAX             5
  135 #define _PC_PIPE_BUF             6
  136 #define _PC_CHOWN_RESTRICTED     7
  137 #define _PC_NO_TRUNC             8
  138 #define _PC_VDISABLE             9
  139 
  140 #if __POSIX_VISIBLE >= 199309
  141 #define _PC_ASYNC_IO            53
  142 #define _PC_PRIO_IO             54
  143 #define _PC_SYNC_IO             55
  144 #endif
  145 
  146 #if __POSIX_VISIBLE >= 200112
  147 #define _PC_ALLOC_SIZE_MIN      10
  148 #define _PC_FILESIZEBITS        12
  149 #define _PC_REC_INCR_XFER_SIZE  14
  150 #define _PC_REC_MAX_XFER_SIZE   15
  151 #define _PC_REC_MIN_XFER_SIZE   16
  152 #define _PC_REC_XFER_ALIGN      17
  153 #define _PC_SYMLINK_MAX         18
  154 #endif
  155 
  156 #if __BSD_VISIBLE
  157 #define _PC_ACL_EXTENDED        59
  158 #define _PC_ACL_PATH_MAX        60
  159 #define _PC_CAP_PRESENT         61
  160 #define _PC_INF_PRESENT         62
  161 #define _PC_MAC_PRESENT         63
  162 #endif
  163 
  164 /* From OpenSolaris, used by SEEK_DATA/SEEK_HOLE. */
  165 #define _PC_MIN_HOLE_SIZE       21
  166 
  167 #if __BSD_VISIBLE
  168 /*
  169  * rfork() options.
  170  *
  171  * XXX currently, operations without RFPROC set are not supported.
  172  */
  173 #define RFNAMEG         (1<<0)  /* UNIMPL new plan9 `name space' */
  174 #define RFENVG          (1<<1)  /* UNIMPL copy plan9 `env space' */
  175 #define RFFDG           (1<<2)  /* copy fd table */
  176 #define RFNOTEG         (1<<3)  /* UNIMPL create new plan9 `note group' */
  177 #define RFPROC          (1<<4)  /* change child (else changes curproc) */
  178 #define RFMEM           (1<<5)  /* share `address space' */
  179 #define RFNOWAIT        (1<<6)  /* parent need not wait() on child */
  180 #define RFCNAMEG        (1<<10) /* UNIMPL zero plan9 `name space' */
  181 #define RFCENVG         (1<<11) /* UNIMPL zero plan9 `env space' */
  182 #define RFCFDG          (1<<12) /* zero fd table */
  183 #define RFTHREAD        (1<<13) /* enable kernel thread support */
  184 #define RFSIGSHARE      (1<<14) /* share signal handlers */
  185 #define RFLINUXTHPN     (1<<16) /* do linux clone exit parent notification */
  186 #define RFPGLOCK        (1<<30) /* process group interlock for signal race */
  187 #define RFPPWAIT        (1<<31) /* parent sleeps until child exits (vfork) */
  188 #define RFKERNELONLY    (RFPGLOCK | RFPPWAIT)
  189 
  190 /*
  191  * Extended exit extexit() operation modes.
  192  */
  193 /* Types of action to communicate exit */
  194 #define EXTEXIT_SIMPLE  0
  195 #define EXTEXIT_SETINT  1
  196 #define EXTEXIT_ACTION(f) ((f) & 0xffff)
  197 /* Types describing what to exit */
  198 #define EXTEXIT_PROC    (0<<16)
  199 #define EXTEXIT_LWP     (1<<16)
  200 #define EXTEXIT_WHO(f)  ((f) & (0xffff<<16))
  201 
  202 
  203 /*
  204  * Parameters for the creation of a new lwp.
  205  */
  206 struct lwp_params {
  207         void (*func)(void *);   /* Function to start execution */
  208         void *arg;              /* Parameter to this function */
  209         void *stack;            /* Stack address to use */
  210         lwpid_t *tid1;          /* Address to copy out new tid */
  211         lwpid_t *tid2;          /* Same */
  212 };
  213 
  214 #endif /* __BSD_VISIBLE */
  215 
  216 #endif /* !_SYS_UNISTD_H_ */

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