In article <87aeqwz8d8.fsf@shuttle.svib.ru>, Alex Povolotsky wrote:
>Denis> From: Denis Shaposhnikov <dsh@neva.vlink.ru> FreeBSD 3.2, пропал
>Denis> сабж. Hи одного слайса не видно. Можно ли вытащить данные?
>Держи программу. Это наколенный хак, в работе требует головы и calc'а, но
>мне disklabel вытащил.
аналогичная программка от Niall Smart ниже. Главное отличие в том, что
пытается посоветовать disklabel entries сама. Пример работы и полное
письмо автора можно найти на
http://www.freebsd.org/cgi/getmsg.cgi?fetch=51795+58713+/usr/local/www
/db/text/1999/freebsd-hackers/19990627.freebsd-hackers
(URL одной строкой)
/*
* Copyright (c) 1999 Niall Smart. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Niall Smart,niall@pobox.com.
*
* THIS SOFTWARE IS PROVIDED BY NIALL SMART ``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 NIALL SMART 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 <sys/param.h>
#include <ufs/ffs/fs.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <stddef.h>
#include <stdlib.h>
#include <limits.h>
int
main(int argc, char** argv)
{
int fd;
int ret;
off_t offset;
u_quad_t skip;
char* ptr;
char buf[SBSIZE];
struct fs* fs = (struct fs*)buf;
if (argc != 3) {
fprintf(stderr, "usage: %s device skip\n", argv[0]);
exit(1);
}
if ( (fd = open(argv[1], O_RDONLY)) < 0) {
perror("open");
exit(1);
}
if ( (skip = strtouq(argv[2], &ptr, 0)) == QUAD_MAX || *ptr != '\0') {
fprintf(stderr, "bad seek value: %s\n", argv[2]);
exit(1);
}
if ( (skip % SBOFF) != 0)
fprintf(stderr,
"warning: %qu is not a multiple of SBOFF (%d)\n", skip, (int)SBOFF);;
if (skip > 0) {
fprintf(stderr, "skipping %qu bytes\n", skip);
lseek(fd, skip, SEEK_SET);
}
while (1) {
ret = read(fd, buf, sizeof(buf));
if (ret < 0) {
perror("read");
exit(1);
}
/*
* based on checks in /sys/ufs/ffs/ffs_vfsops.c, line 478
*/
if (fs->fs_magic == FS_MAGIC &&
fs->fs_bsize <= MAXBSIZE &&
fs->fs_bsize >= (int32_t)sizeof(struct fs)) {
offset = lseek(fd, 0, SEEK_CUR);
printf("found superblock: offset=%qd, fs_size=%d, "
fs_fsmnt=%.*s\n", offset, fs->fs_size,
MAXMNTLEN, fs->fs_fsmnt);
printf("suggested disklabel entry:\n\n");
printf(" size offset fstype\n");
printf("%8d %8qd 4.2BSD\n\n", fs->fs_size * 2,
(offset - 16384) / 512);
}
}
printf("%d:%d\n", sizeof(struct fs), offsetof(struct fs, fs_magic));
return 0;
}
V.
-- end of forwarded message --
--
С тем, что не помешает никогда,
Kittle