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Diffstat (limited to 'ufs/dir.h')
| -rw-r--r-- | ufs/dir.h | 163 |
1 files changed, 0 insertions, 163 deletions
diff --git a/ufs/dir.h b/ufs/dir.h deleted file mode 100644 index 5730ef44..00000000 --- a/ufs/dir.h +++ /dev/null @@ -1,163 +0,0 @@ -/* Modified from BSD by Michael I. Bushnell for GNU Hurd ufs server. */ -/* - * Copyright (c) 1982, 1986, 1989, 1993 - * The Regents of the University of California. All rights reserved. - * (c) UNIX System Laboratories, Inc. - * All or some portions of this file are derived from material licensed - * to the University of California by American Telephone and Telegraph - * Co. or Unix System Laboratories, Inc. and are reproduced herein with - * the permission of UNIX System Laboratories, Inc. - * - * 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. - * - * @(#)dir.h 8.2 (Berkeley) 1/21/94 - */ - -#ifndef _DIR_H_ -#define _DIR_H_ - -#include <endian.h> - -/* - * A directory consists of some number of blocks of DIRBLKSIZ - * bytes, where DIRBLKSIZ is chosen such that it can be transferred - * to disk in a single atomic operation (e.g. 512 bytes on most machines). - * - * Each DIRBLKSIZ byte block contains some number of directory entry - * structures, which are of variable length. Each directory entry has - * a struct direct 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. - * - * The macro DIRSIZ(fmt, dp) gives the amount of space required to represent - * a directory entry. Free space in a directory is represented by - * entries which have dp->d_reclen > DIRSIZ(fmt, dp). All DIRBLKSIZ bytes - * in a directory block are claimed by the directory entries. This - * usually results in the last entry in a directory having a large - * dp->d_reclen. When entries are deleted from a directory, the - * space is returned to the previous entry in the same directory - * block by increasing its dp->d_reclen. If the first entry of - * a directory block is free, then its dp->d_ino is set to 0. - * Entries other than the first in a directory do not normally have - * dp->d_ino set to 0. - */ -#define DIRBLKSIZ DEV_BSIZE -#undef MAXNAMLEN -#define MAXNAMLEN 255 - -/* Don't call this struct DIRECT because the library defines that - (sometimes) in a possible different way. */ - -struct directory_entry { - u_long d_ino; /* inode number of entry */ - u_short d_reclen; /* length of this record */ - u_char d_type; /* file type, see below */ - u_char d_namlen; /* length of string in d_name */ - char d_name[MAXNAMLEN + 1]; /* name with length <= MAXNAMLEN */ -}; - -/* Return the type from a struct directory_entry, paying attention to whether - this filesystem supports the type extension */ -#define DIRECT_TYPE(dp) (direct_symlink_extension ? (dp)->d_type : DT_UNKNOWN) - -/* Return the namlen from a struct direct, paying attention to whether - this filesystem supports the type extension */ -#if (BYTE_ORDER == LITTLE_ENDIAN) -#define DIRECT_NAMLEN(dp) (*(direct_symlink_extension || swab_disk \ - ? &(dp)->d_namlen \ - : &(dp)->d_type)) -#else -#define DIRECT_NAMLEN(dp) (*(!direct_symlink_extension && swab_disk \ - ? &(dp)->d_type \ - : &(dp)->d_namlen)) -#endif - -/* - * The DIRSIZ macro gives the minimum record length which will hold - * the directory entry. This requires the amount of space in struct direct - * 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. - */ -/* In BSD this macro takes a struct direct. Modified by MIB here to - take the namelen (as computed by strlen). */ -#define DIRSIZ(namelen) \ - ((sizeof (struct directory_entry) - (MAXNAMLEN+1)) + (((namelen)+1 + 3) &~ 3)) - -#if 0 /* This is the BSD definition */ -#if (BYTE_ORDER == LITTLE_ENDIAN) -#define DIRSIZ(oldfmt, dp) \ - ((oldfmt) ? \ - ((sizeof (struct direct) - (MAXNAMLEN+1)) + (((dp)->d_type+1 + 3) &~ 3)) : \ - ((sizeof (struct direct) - (MAXNAMLEN+1)) + (((dp)->d_namlen+1 + 3) &~ 3))) -#else -#define DIRSIZ(oldfmt, dp) \ - ((sizeof (struct direct) - (MAXNAMLEN+1)) + (((dp)->d_namlen+1 + 3) &~ 3)) -#endif -#endif /* 0 */ - -#define OLDDIRFMT 1 -#define NEWDIRFMT 0 - -#if 0 /* Not used in GNU */ -/* - * Template for manipulating directories. - * Should use struct direct's, but the name field - * is MAXNAMLEN - 1, and this just won't do. - */ -struct dirtemplate { - u_long dot_ino; - short dot_reclen; - u_char dot_type; - u_char dot_namlen; - char dot_name[4]; /* must be multiple of 4 */ - u_long dotdot_ino; - short dotdot_reclen; - u_char dotdot_type; - u_char dotdot_namlen; - char dotdot_name[4]; /* ditto */ -}; - -/* - * This is the old format of directories, sanz type element. - */ -struct odirtemplate { - u_long dot_ino; - short dot_reclen; - u_short dot_namlen; - char dot_name[4]; /* must be multiple of 4 */ - u_long dotdot_ino; - short dotdot_reclen; - u_short dotdot_namlen; - char dotdot_name[4]; /* ditto */ -}; -#endif /* 0 */ - -#endif /* !_DIR_H_ */ |