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/* $OpenBSD: scan_ffs.c,v 1.23 2019/06/28 13:32:46 deraadt Exp $ */
/*
* Copyright (c) 1998 Niklas Hallqvist, Tobias Weingartner
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
#include <sys/types.h>
#include <ufs/ffs/fs.h>
#include <err.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <util.h>
#define SBCOUNT 64 /* XXX - Should be configurable */
/* Flags to control ourselves... */
#define FLAG_VERBOSE 1
#define FLAG_SMART 2
#define FLAG_LABELS 4
static void usage(void);
static int
ufsscan(int fd, daddr_t beg, daddr_t end, int flags)
{
static char lastmount[MAXMNTLEN];
static u_int8_t buf[SBSIZE * SBCOUNT];
struct fs *sb;
daddr_t blk, lastblk;
int n;
lastblk = -1;
memset(lastmount, 0, MAXMNTLEN);
for (blk = beg; blk <= ((end<0)?blk:end); blk += (SBCOUNT*SBSIZE/512)){
memset(buf, 0, SBSIZE * SBCOUNT);
if (lseek(fd, (off_t)blk * 512, SEEK_SET) == -1)
err(1, "lseek");
if (read(fd, buf, SBSIZE * SBCOUNT) == -1)
err(1, "read");
for (n = 0; n < (SBSIZE * SBCOUNT); n += 512){
sb = (struct fs*)(&buf[n]);
if (sb->fs_magic == FS_MAGIC) {
if (flags & FLAG_VERBOSE)
printf("block %lld id %x,%x size %d\n",
(long long)(blk + (n/512)),
sb->fs_id[0], sb->fs_id[1],
sb->fs_ffs1_size);
if (((blk+(n/512)) - lastblk) == (SBSIZE/512)) {
if (flags & FLAG_LABELS ) {
printf("X: %lld %lld 4.2BSD %d %d %d # %s\n",
((off_t)sb->fs_ffs1_size *
sb->fs_fsize / 512),
(long long)(blk + (n/512) -
(2*SBSIZE/512)),
sb->fs_fsize, sb->fs_bsize,
sb->fs_cpg, lastmount);
} else {
/* XXX 2038 */
time_t t = sb->fs_ffs1_time;
printf("ffs at %lld size %lld "
"mount %s time %s",
(long long)(blk+(n/512) -
(2*SBSIZE/512)),
(long long)(off_t)sb->fs_ffs1_size *
sb->fs_fsize,
lastmount, ctime(&t));
}
if (flags & FLAG_SMART) {
off_t size = (off_t)sb->fs_ffs1_size *
sb->fs_fsize;
if ((n + size) < (SBSIZE * SBCOUNT))
n += size;
else {
blk += (size/512 -
(SBCOUNT*SBCOUNT));
break;
}
}
}
/* Update last potential FS SBs seen */
lastblk = blk + (n/512);
memcpy(lastmount, sb->fs_fsmnt, MAXMNTLEN);
}
}
}
return(0);
}
static void
usage(void)
{
extern char *__progname;
fprintf(stderr, "usage: %s [-lsv] [-b begin] [-e end] device\n",
__progname);
exit(1);
}
int
main(int argc, char *argv[])
{
int ch, fd, flags = 0;
daddr_t beg = 0, end = -1;
const char *errstr;
if (pledge("stdio rpath disklabel", NULL) == -1)
err(1, "pledge");
while ((ch = getopt(argc, argv, "lsvb:e:")) != -1)
switch(ch) {
case 'b':
beg = strtonum(optarg, 0, LLONG_MAX, &errstr);
if (errstr)
errx(1, "%s: %s", optarg, errstr);
break;
case 'e':
end = strtonum(optarg, 0, LLONG_MAX, &errstr);
if (errstr)
errx(1, "%s: %s", optarg, errstr);
break;
case 'v':
flags |= FLAG_VERBOSE;
break;
case 's':
flags |= FLAG_SMART;
break;
case 'l':
flags |= FLAG_LABELS;
break;
default:
usage();
/* NOTREACHED */
}
argc -= optind;
argv += optind;
if (argc != 1)
usage();
fd = opendev(argv[0], O_RDONLY, OPENDEV_PART, NULL);
if (fd == -1)
err(1, "%s", argv[0]);
if (pledge("stdio", NULL) == -1)
err(1, "pledge");
return (ufsscan(fd, beg, end, flags));
}
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