freebsd-dev/sbin/gpt/remove.c
Marcel Moolenaar c10b34ed19 Use strtoll(3) instead of strtol(3) for the starting block or
partition size. On 32-bit platforms sizeof(long) < sizeof(off_t)
and using strtol(3) would prevent partitions larger than 4G
sectors or beyond 4G blocks.

PR: bin/103991
MFC after: 3 days
2006-10-04 18:20:25 +00:00

208 lines
5.0 KiB
C

/*-
* Copyright (c) 2004 Marcel Moolenaar
* 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/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <err.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "map.h"
#include "gpt.h"
static int all;
static uuid_t type;
static off_t block, size;
static unsigned int entry;
static void
usage_remove(void)
{
fprintf(stderr,
"usage: %s -a device ...\n"
" %s [-b lba] [-i index] [-s lba] [-t uuid] device ...\n",
getprogname(), getprogname());
exit(1);
}
static void
rem(int fd)
{
uuid_t uuid;
map_t *gpt, *tpg;
map_t *tbl, *lbt;
map_t *m;
struct gpt_hdr *hdr;
struct gpt_ent *ent;
unsigned int i;
gpt = map_find(MAP_TYPE_PRI_GPT_HDR);
if (gpt == NULL) {
warnx("%s: error: no primary GPT header; run create or recover",
device_name);
return;
}
tpg = map_find(MAP_TYPE_SEC_GPT_HDR);
if (tpg == NULL) {
warnx("%s: error: no secondary GPT header; run recover",
device_name);
return;
}
tbl = map_find(MAP_TYPE_PRI_GPT_TBL);
lbt = map_find(MAP_TYPE_SEC_GPT_TBL);
if (tbl == NULL || lbt == NULL) {
warnx("%s: error: run recover -- trust me", device_name);
return;
}
/* Remove all matching entries in the map. */
for (m = map_first(); m != NULL; m = m->map_next) {
if (m->map_type != MAP_TYPE_GPT_PART || m->map_index < 1)
continue;
if (entry > 0 && entry != m->map_index)
continue;
if (block > 0 && block != m->map_start)
continue;
if (size > 0 && size != m->map_size)
continue;
i = m->map_index - 1;
hdr = gpt->map_data;
ent = (void*)((char*)tbl->map_data + i *
le32toh(hdr->hdr_entsz));
le_uuid_dec(&ent->ent_type, &uuid);
if (!uuid_is_nil(&type, NULL) &&
!uuid_equal(&type, &uuid, NULL))
continue;
/* Remove the primary entry by clearing the partition type. */
uuid_create_nil(&ent->ent_type, NULL);
hdr->hdr_crc_table = htole32(crc32(tbl->map_data,
le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz)));
hdr->hdr_crc_self = 0;
hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size)));
gpt_write(fd, gpt);
gpt_write(fd, tbl);
hdr = tpg->map_data;
ent = (void*)((char*)lbt->map_data + i *
le32toh(hdr->hdr_entsz));
/* Remove the secundary entry. */
uuid_create_nil(&ent->ent_type, NULL);
hdr->hdr_crc_table = htole32(crc32(lbt->map_data,
le32toh(hdr->hdr_entries) * le32toh(hdr->hdr_entsz)));
hdr->hdr_crc_self = 0;
hdr->hdr_crc_self = htole32(crc32(hdr, le32toh(hdr->hdr_size)));
gpt_write(fd, lbt);
gpt_write(fd, tpg);
printf("%sp%u removed\n", device_name, m->map_index);
}
}
int
cmd_remove(int argc, char *argv[])
{
char *p;
int ch, fd;
/* Get the remove options */
while ((ch = getopt(argc, argv, "ab:i:s:t:")) != -1) {
switch(ch) {
case 'a':
if (all > 0)
usage_remove();
all = 1;
break;
case 'b':
if (block > 0)
usage_remove();
block = strtoll(optarg, &p, 10);
if (*p != 0 || block < 1)
usage_remove();
break;
case 'i':
if (entry > 0)
usage_remove();
entry = strtol(optarg, &p, 10);
if (*p != 0 || entry < 1)
usage_remove();
break;
case 's':
if (size > 0)
usage_remove();
size = strtoll(optarg, &p, 10);
if (*p != 0 || size < 1)
usage_remove();
break;
case 't':
if (!uuid_is_nil(&type, NULL))
usage_remove();
if (parse_uuid(optarg, &type) != 0)
usage_remove();
break;
default:
usage_remove();
}
}
if (!all ^
(block > 0 || entry > 0 || size > 0 || !uuid_is_nil(&type, NULL)))
usage_remove();
if (argc == optind)
usage_remove();
while (optind < argc) {
fd = gpt_open(argv[optind++]);
if (fd == -1) {
warn("unable to open device '%s'", device_name);
continue;
}
rem(fd);
gpt_close(fd);
}
return (0);
}