dirent.h
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上传日期:2007-04-14
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- /* $NetBSD: dirent.h,v 1.12 1996/04/09 20:55:25 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. 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
- */
- /*
- * 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
- };
- #ifdef PTHREAD_KERNEL
- #define d_ino d_fileno
- #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)
- #if defined(_KERNEL)
- /*
- * The DIRENT_SIZE macro gives the minimum record length which will hold
- * the directory entry. This requires the amount of space in struct dirent
- * without the d_name field, plus enough space for the name with a terminating
- * null byte (dp->d_namlen+1), rounded up to a 4 byte boundary.
- */
- #define DIRENT_SIZE(dp)
- ((sizeof (struct dirent) - (MAXNAMLEN+1)) + (((dp)->d_namlen+1 + 3) &~ 3))
- #endif /* !_KERNEL */