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

     /*      $OpenBSD: unistd.h,v 1.31 2015/07/20 00:56:10 guenther Exp $    */
     /*      $NetBSD: unistd.h,v 1.10 1994/06/29 06:46:06 cgd Exp $  */
     
     /*
      * Copyright (c) 1989, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)unistd.h    8.2 (Berkeley) 1/7/94
     */
    
    #ifndef _SYS_UNISTD_H_
    #define _SYS_UNISTD_H_
    
    #include <sys/cdefs.h>
    
    #define _POSIX_VDISABLE         (0377)
    #define _POSIX_ASYNC_IO         (-1)
    #define _POSIX_PRIO_IO          (-1)
    #define _POSIX_SYNC_IO          (-1)
    
    /* Define the POSIX.1 version we target for compliance. */
    #define _POSIX_VERSION          200809L
    
    /* access function */
    #define F_OK            0       /* test for existence of file */
    #define X_OK            0x01    /* test for execute or search permission */
    #define W_OK            0x02    /* test for write permission */
    #define R_OK            0x04    /* test for read permission */
    
    /* whence values for lseek(2) */
    #define SEEK_SET        0       /* set file offset to offset */
    #define SEEK_CUR        1       /* set file offset to current plus offset */
    #define SEEK_END        2       /* set file offset to EOF plus offset */
    
    #if __BSD_VISIBLE
    /* old BSD whence values for lseek(2); renamed by POSIX 1003.1 */
    #define L_SET           SEEK_SET
    #define L_INCR          SEEK_CUR
    #define L_XTND          SEEK_END
    
    /* the parameters argument passed to the __tfork() syscall */
    struct __tfork {
            void    *tf_tcb;
            pid_t   *tf_tid;
            void    *tf_stack;
    };
    
    /* the parameters argument for the kbind() syscall */
    struct __kbind {
            void    *kb_addr;
            size_t  kb_size;
    };
    #define KBIND_BLOCK_MAX 2       /* powerpc, sparc, and sparc64 need 2 blocks */
    #define KBIND_DATA_MAX  24      /* sparc64 needs 6, four-byte words */
    #endif
    
    /* the pathconf(2) variable values are part of the ABI */
    
    /* configurable pathname variables */
    #define _PC_LINK_MAX                     1
    #define _PC_MAX_CANON                    2
    #define _PC_MAX_INPUT                    3
    #define _PC_NAME_MAX                     4
    #define _PC_PATH_MAX                     5
    #define _PC_PIPE_BUF                     6
    #define _PC_CHOWN_RESTRICTED             7
    #define _PC_NO_TRUNC                     8
    #define _PC_VDISABLE                     9
    #define _PC_2_SYMLINKS                  10
    #define _PC_ALLOC_SIZE_MIN              11
    #define _PC_ASYNC_IO                    12
    #define _PC_FILESIZEBITS                13
    #define _PC_PRIO_IO                     14
    #define _PC_REC_INCR_XFER_SIZE          15
    #define _PC_REC_MAX_XFER_SIZE           16
   #define _PC_REC_MIN_XFER_SIZE           17
   #define _PC_REC_XFER_ALIGN              18
   #define _PC_SYMLINK_MAX                 19
   #define _PC_SYNC_IO                     20
   #define _PC_TIMESTAMP_RESOLUTION        21
   
   #endif /* !_SYS_UNISTD_H_ */

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