* Copyright (c) 1992 William F. Jolitz, TeleMuse
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* 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 software is a component of "386BSD" developed by
William F. Jolitz, TeleMuse.
* 4. Neither the name of the developer nor the name "386BSD"
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
* THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ
* AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS
* SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT.
* THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT
* NOT MAKE USE THIS WORK.
* FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED
* BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN
* REFERENCES SUCH AS THE "PORTING UNIX TO THE 386" SERIES
* (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING
* JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND
* LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE
* ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS
* OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992.
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``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 DEVELOPER 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
* Routines to sift through a BSD fast filesystem. -wfj
static char rcsid
[] = "$Header: /usr/src/sys.386bsd/i386/boot/RCS/fs.c,v 1.2 92/02/04 14:18:08 bill Exp $";
char superb
[SBSIZE
], abuf
[MAXBSIZE
];
* Translate name to inode number.
/*printf("namei %s\n", s);*/
bread(bdev
, SBOFF
/DEV_BSIZE
, superb
, SBSIZE
);
fs
= (struct fs
*)superb
;
* look for a file in this inode.
ilookup(dip
, s
) struct dinode
*dip
; char *s
; {
/*printf("ilookup %x %s %d\n", dip, s, dip->di_size);*/
iread(dip
, off
, (char *)&dirent
, sizeof(struct direct
));
/*printf("%s ", dirent.d_name);*/
if (strcmp (dirent
.d_name
, s
) == 0)
} while (off
< dip
->di_size
&& dirent
.d_reclen
);
* Extract an inode and return it.
fetchi(i
, dip
) struct dinode
*dip
; {
/*printf("fetchi %d %x\n", i, dip);*/
bread(bdev
, fsbtodb(fs
, itod(fs
, i
)), abuf
, fs
->fs_bsize
);
bcopy (abuf
+ itoo(fs
,i
) * sizeof(struct dinode
),
dip
, sizeof(struct dinode
));
/*printf("mode %o link %d uid %d gid %d size %d [ ",
dip->di_mode, dip->di_nlink, dip->di_uid, dip->di_gid, dip->di_size);
for (i=0; i < NDADDR; i++)
printf("%d ", dip->di_db[i]);
for (i=0; i < NIADDR; i++)
printf("%d ", dip->di_ib[i]);
* Read data contents of an inode
/*printf("iread %x %d %x %d\n", dip, off, p, sz);*/
bs
= dblksize(fs
, dip
, lbn
);
/* logical to physical translation */
bmap(dip
, lbn
, &physblock
);
/* if sz larger than blksize, i/o direct,
otherwise to local buffer */
bread(bdev
, physblock
, p
, bs
);
bread(bdev
, physblock
, abuf
, bs
);
/*printf("bs %d sz %d", bs, sz);*/
printf("Failed:%s\n", s
);