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Diffstat (limited to 'ufs/dinode.h')
| -rw-r--r-- | ufs/dinode.h | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/ufs/dinode.h b/ufs/dinode.h new file mode 100644 index 00000000..dfde2050 --- /dev/null +++ b/ufs/dinode.h @@ -0,0 +1,122 @@ +/* Format of an inode on disk + Copyright (C) 1991, 1993 Free Software Foundation + +This file is part of the GNU Hurd. + +The GNU Hurd is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +The GNU Hurd is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with the GNU Hurd; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + +/* Modified from UCB by Michael I. Bushnell. */ + +/* + * Copyright (c) 1982, 1989 The Regents of the University of California. + * All rights reserved. + * + * Redistribution is only permitted until one year after the first shipment + * of 4.4BSD by the Regents. Otherwise, redistribution and use in source and + * binary forms are permitted provided that: (1) source distributions retain + * this entire copyright notice and comment, and (2) distributions including + * binaries display the following acknowledgement: This product includes + * software developed by the University of California, Berkeley and its + * contributors'' in the documentation or other materials provided with the + * distribution and in all advertising materials mentioning features or use + * of this software. 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 AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + * @(#)dinode.h 7.9 (Berkeley) 6/28/90 + */ + +/* + * This structure defines the on-disk format of an inode. + */ + +#define NDADDR 12 /* direct addresses in inode */ +#define NIADDR 3 /* indirect addresses in inode */ + +/* Indexes into di_ib */ +#define INDIR_SINGLE 0 +#define INDIR_DOUBLE 1 +#define INDIR_TRIPLE 2 /* NOT SUPPORTED */ + +struct dinode { + u_short di_model; /* 0: mode and type of file (low bits) */ + nlink_t di_nlink; /* 2: number of links to file */ + u_short di_uidl; /* 4: owner's user id (low bits) */ + u_short di_gidl; /* 6: owner's group id (low bits) */ + u_quad di_qsize; /* 8: number of bytes in file */ + time_t di_atime; /* 16: time last accessed */ + long di_atusec; + time_t di_mtime; /* 24: time last modified */ + long di_mtusec; + time_t di_ctime; /* 32: last time inode changed */ + long di_ctusec; + daddr_t di_db[NDADDR]; /* 40: disk block addresses */ + daddr_t di_ib[NIADDR]; /* 88: indirect blocks */ + long di_flags; /* 100: status, currently unused */ + long di_blocks; /* 104: blocks actually held */ + long di_gen; /* 108: generation number */ + long di_trans; /* 112: filesystem tranlator */ + uid_t di_author; /* 116: author id */ + u_short di_uidh; /* 120: user id (high bits) */ + u_short di_gidh; /* 122: group id (high bits) */ + u_short di_modeh; /* 124: mode (high bits) */ + short di_spare; /* 126: reserved, currently unused */ +}; + +#define DI_UID(di) ((di)->di_uidl | ((int)(di)->di_uidh << 16)) +#define DI_GID(di) ((di)->di_gidl | ((int)(di)->di_gidh << 16)) +#define DI_MODE(di) ((di)->di_model | ((int)(di)->di_modeh << 16)) + +#define LINK_MAX 32767 /* limited by width of nlink_t == 16 bits */ + +#if BYTE_ORDER == LITTLE_ENDIAN || defined(tahoe) /* ugh! -- must be fixed */ +#define di_size di_qsize.val[0] +#else /* BYTE_ORDER == BIG_ENDIAN */ +#define di_size di_qsize.val[1] +#endif +#define di_rdev di_db[0] + +/* file modes -- these are known to match appropriate values in gnu/stat.h */ +#define IFMT 000000170000 /* type of file */ +#define IFIFO 000000010000 /* named pipe (fifo) */ +#define IFCHR 000000020000 /* character special */ +#define IFDIR 000000040000 /* directory */ +#define IFBLK 000000060000 /* block special */ +#define IFREG 000000100000 /* regular */ +#define IFLNK 000000120000 /* symbolic link */ +#define IFSOCK 000000140000 /* socket */ + +#define ISPEC 000000607000 /* special user-changeable bits */ +#define INOCACHE 000000400000 /* don't cache contents */ +#define IUSEUNK 000000200000 /* use IUNK in pref to IKNOWN */ +#define ISUID 000000004000 /* set user id on execution */ +#define ISGID 000000002000 /* set group id on execution */ +#define ISVTX 000000001000 /* caching preference / append only dir */ + +/* masks for various sets of permissions: */ +#define IOWNER 000000000700 /* owner of file */ +#define IGROUP 000000000070 /* group of file */ +#define IKNOWN 000000000007 /* anyone who possesses a uid */ +#define IUNKNOWN 000007000000 /* anyone who doesn't possess a uid */ + +#define ISPARE 037770000000 /* unused (yet) */ + +#define IREAD 0400 /* read, write, execute permissions */ +#define IWRITE 0200 +#define IEXEC 0100 + |