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Annotation of sys/sys/dirent.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: dirent.h,v 1.8 2006/08/17 12:40:11 jmc Exp $  */
        !             2: /*     $NetBSD: dirent.h,v 1.12 1996/04/09 20:55:25 cgd Exp $  */
        !             3:
        !             4: /*-
        !             5:  * Copyright (c) 1989, 1993
        !             6:  *     The Regents of the University of California.  All rights reserved.
        !             7:  *
        !             8:  * Redistribution and use in source and binary forms, with or without
        !             9:  * modification, are permitted provided that the following conditions
        !            10:  * are met:
        !            11:  * 1. Redistributions of source code must retain the above copyright
        !            12:  *    notice, this list of conditions and the following disclaimer.
        !            13:  * 2. Redistributions in binary form must reproduce the above copyright
        !            14:  *    notice, this list of conditions and the following disclaimer in the
        !            15:  *    documentation and/or other materials provided with the distribution.
        !            16:  * 3. Neither the name of the University nor the names of its contributors
        !            17:  *    may be used to endorse or promote products derived from this software
        !            18:  *    without specific prior written permission.
        !            19:  *
        !            20:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            21:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            22:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            23:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            24:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            25:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            26:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            27:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            28:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            29:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            30:  * SUCH DAMAGE.
        !            31:  *
        !            32:  *     @(#)dirent.h    8.3 (Berkeley) 8/10/94
        !            33:  */
        !            34:
        !            35: #ifndef _SYS_DIRENT_H_
        !            36: #define _SYS_DIRENT_H_
        !            37:
        !            38: #include <sys/cdefs.h>
        !            39:
        !            40: /*
        !            41:  * The dirent structure defines the format of directory entries returned by
        !            42:  * the getdirentries(2) system call.
        !            43:  *
        !            44:  * A directory entry has a struct dirent at the front of it, containing its
        !            45:  * inode number, the length of the entry, and the length of the name
        !            46:  * contained in the entry.  These are followed by the name padded to a 4
        !            47:  * byte boundary with null bytes.  All names are guaranteed null terminated.
        !            48:  * The maximum length of a name in a directory is MAXNAMLEN.
        !            49:  */
        !            50:
        !            51: struct dirent {
        !            52:        u_int32_t d_fileno;             /* file number of entry */
        !            53:        u_int16_t d_reclen;             /* length of this record */
        !            54:        u_int8_t  d_type;               /* file type, see below */
        !            55:        u_int8_t  d_namlen;             /* length of string in d_name */
        !            56: #if __BSD_VISIBLE
        !            57: #define        MAXNAMLEN       255
        !            58:        char    d_name[MAXNAMLEN + 1];  /* name must be no longer than this */
        !            59: #else
        !            60:        char    d_name[255 + 1];        /* name must be no longer than this */
        !            61: #endif
        !            62: };
        !            63:
        !            64: #if __BSD_VISIBLE
        !            65: /*
        !            66:  * File types
        !            67:  */
        !            68: #define        DT_UNKNOWN       0
        !            69: #define        DT_FIFO          1
        !            70: #define        DT_CHR           2
        !            71: #define        DT_DIR           4
        !            72: #define        DT_BLK           6
        !            73: #define        DT_REG           8
        !            74: #define        DT_LNK          10
        !            75: #define        DT_SOCK         12
        !            76:
        !            77: /*
        !            78:  * Convert between stat structure types and directory types.
        !            79:  */
        !            80: #define        IFTODT(mode)    (((mode) & 0170000) >> 12)
        !            81: #define        DTTOIF(dirtype) ((dirtype) << 12)
        !            82:
        !            83: /*
        !            84:  * The DIRENT_SIZE macro gives the minimum record length which will hold
        !            85:  * the directory entry.  This returns the amount of space in struct dirent
        !            86:  * without the d_name field, plus enough space for the name with a terminating
        !            87:  * null byte (dp->d_namlen+1), rounded up to a 4 byte boundary.
        !            88:  */
        !            89: #define        DIRENT_SIZE(dp) \
        !            90:     ((sizeof (struct dirent) - (MAXNAMLEN+1)) + (((dp)->d_namlen+1 + 3) &~ 3))
        !            91:
        !            92: #endif /* __BSD_VISIBLE */
        !            93:
        !            94: #endif /* _SYS_DIRENT_H_ */