1130b656e5
This will make a number of things easier in the future, as well as (finally!) avoiding the Id-smashing problem which has plagued developers for so long. Boy, I'm glad we're not using sup anymore. This update would have been insane otherwise.
112 lines
4.4 KiB
C
112 lines
4.4 KiB
C
/*
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* Copyright (c) 1982, 1989 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)dinode.h 7.10 (Berkeley) 5/8/91
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* $FreeBSD$
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*/
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#ifndef _UFS_DINODE_H_
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#define _UFS_DINODE_H_ 1
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/*
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* A dinode contains all the meta-data associated with a UFS file.
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* This structure defines the on-disk format of a dinode.
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*/
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#define NDADDR 12 /* direct addresses in inode */
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#define NIADDR 3 /* indirect addresses in inode */
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#define MAXFASTLINK (((NDADDR+NIADDR) * sizeof(daddr_t)) - 1)
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struct dinode {
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u_short di_mode; /* 0: mode and type of file */
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short di_nlink; /* 2: number of links to file */
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uid_t di_uid; /* 4: owner's user id */
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gid_t di_gid; /* 6: owner's group id */
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union {
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/* u_quad_t v;*/
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u_long val[2];
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} di_qsize; /* 8: number of bytes in file */
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time_t di_atime; /* 16: time last accessed */
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long di_atspare;
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time_t di_mtime; /* 24: time last modified */
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long di_mtspare;
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time_t di_ctime; /* 32: last time inode changed */
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long di_ctspare;
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union {
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struct {
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daddr_t di_udb[NDADDR]; /* 40: disk block addresses */
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daddr_t di_uib[NIADDR]; /* 88: indirect blocks */
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} di_addr;
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char di_usymlink[MAXFASTLINK+1];
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} di_un;
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long di_flags; /* 100: status, currently unused */
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long di_blocks; /* 104: blocks actually held */
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long di_gen; /* 108: generation number */
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#define DI_SPARE_SZ 4 /* 112: spare for 4 longs */
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u_long di_spare[DI_SPARE_SZ]; /* reserved (unused) */
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};
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#define di_db di_un.di_addr.di_udb
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#define di_ib di_un.di_addr.di_uib
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#define di_symlink di_un.di_usymlink
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#if BYTE_ORDER == LITTLE_ENDIAN || defined(tahoe) /* ugh! -- must be fixed */
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#define di_size di_qsize.val[0]
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#else /* BYTE_ORDER == BIG_ENDIAN */
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#define di_size di_qsize.val[1]
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#endif
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#define di_rdev di_db[0]
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/* file modes */
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#define IFMT 0170000 /* mask of file type */
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#define IFIFO 0010000 /* named pipe (fifo) */
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#define IFCHR 0020000 /* character special device */
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#define IFDIR 0040000 /* directory */
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#define IFBLK 0060000 /* block special device */
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#define IFREG 0100000 /* regular file */
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#define IFLNK 0120000 /* symbolic link */
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#define IFSOCK 0140000 /* UNIX domain socket */
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#define ISUID 04000 /* set user identifier when exec'ing */
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#define ISGID 02000 /* set group identifier when exec'ing */
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#define ISVTX 01000 /* save execution information on exit */
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#define IREAD 0400 /* read permission */
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#define IWRITE 0200 /* write permission */
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#define IEXEC 0100 /* execute permission */
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#define DFASTLINK(di) \
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((((di).di_mode & IFMT) == IFLNK) && \
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((di).di_size <= MAXFASTLINK) && \
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((di).di_size == (di).di_spare[0]))
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#endif /* _UFS_DINODE_H_ */
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