usr/src/lib/libbc/inc/include/sys/dirent.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 1989 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1984 AT&T */
  28 /*        All Rights Reserved   */
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 /*
  33  * Filesystem-independent directory information.
  34  * Directory entry structures are of variable length.
  35  * Each directory entry is a struct dirent containing its file number, the
  36  * offset of the next entry (a cookie interpretable only the filesystem
  37  * type that generated it), the length of the entry, and the length of the
  38  * name contained in the entry.  These are followed by the name. The
  39  * entire entry is padded with null bytes to a 4 byte boundary. All names
  40  * are guaranteed null terminated. The maximum length of a name in a
  41  * directory is MAXNAMLEN, plus a null byte.
  42  */
  43
  44 #ifndef __sys_dirent_h
  45 #define __sys_dirent_h
  46
  47 struct  dirent {
  48         off_t           d_off;          /* offset of next disk dir entry */
  49         unsigned long   d_fileno;       /* file number of entry */
  50         unsigned short  d_reclen;       /* length of this record */
  51         unsigned short  d_namlen;       /* length of string in d_name */
  52         char            d_name[255+1];  /* name (up to MAXNAMLEN + 1) */
  53 };
  54
  55 #ifndef _POSIX_SOURCE
  56 /*
  57  * It's unlikely to change, but make sure that sizeof d_name above is
  58  * at least MAXNAMLEN + 1 (more may be added for padding).
  59  */
  60 #define MAXNAMLEN       255
  61 /*
  62  * The macro DIRSIZ(dp) gives the minimum amount of space required to represent
  63  * a directory entry.  For any directory entry dp->d_reclen >= DIRSIZ(dp).
  64  * Specific filesystem types may use this macro to construct the value
  65  * for d_reclen.
  66  */
  67 #undef  DIRSIZ
  68 #define DIRSIZ(dp) \
  69         (((sizeof(struct dirent) - (MAXNAMLEN+1) + ((dp)->d_namlen+1)) +3) & ~3)
  70
  71 #endif  /* !_POSIX_SOURCE */
  72 #endif  /* !__sys_dirent_h */