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

     /*-
      * 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. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. 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.
     *
     *      @(#)dirent.h    8.3 (Berkeley) 8/10/94
     * $FreeBSD: src/sys/sys/dirent.h,v 1.5.4.1 1999/09/05 08:22:08 peter Exp $
     */
    
    #ifndef _SYS_DIRENT_H_
    #define _SYS_DIRENT_H_
    
    /*
     * The dirent structure defines the format of directory entries returned by
     * the getdirentries(2) system call.
     *
     * A directory entry has a struct dirent at the front of it, containing its
     * inode number, the length of the entry, and the length of the name
     * contained in the entry.  These are followed by the name padded to a 4
     * byte boundary with null bytes.  All names are guaranteed null terminated.
     * The maximum length of a name in a directory is MAXNAMLEN.
     */
    
    struct dirent {
            u_int32_t d_fileno;             /* file number of entry */
            u_int16_t d_reclen;             /* length of this record */
            u_int8_t  d_type;               /* file type, see below */
            u_int8_t  d_namlen;             /* length of string in d_name */
    #ifdef _POSIX_SOURCE
            char    d_name[255 + 1];        /* name must be no longer than this */
    #else
    #define MAXNAMLEN       255
            char    d_name[MAXNAMLEN + 1];  /* name must be no longer than this */
    #endif
    };
    
    /*
     * File types
     */
    #define DT_UNKNOWN       0
    #define DT_FIFO          1
    #define DT_CHR           2
    #define DT_DIR           4
    #define DT_BLK           6
    #define DT_REG           8
    #define DT_LNK          10
    #define DT_SOCK         12
    #define DT_WHT          14
    
    /*
     * Convert between stat structure types and directory types.
     */
    #define IFTODT(mode)    (((mode) & 0170000) >> 12)
    #define DTTOIF(dirtype) ((dirtype) << 12)
    
    #endif

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