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/*
* Minix partition parsing code
*
* Copyright (C) 2009 Karel Zak <kzak@redhat.com>
*
* This file may be redistributed under the terms of the
* GNU Lesser General Public License.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include "partitions.h"
#include "minix.h"
static int probe_minix_pt(blkid_probe pr,
const struct blkid_idmag *mag __attribute__((__unused__)))
{
struct dos_partition *p;
blkid_parttable tab = NULL;
blkid_partition parent;
blkid_partlist ls;
unsigned char *data;
int i;
data = blkid_probe_get_sector(pr, 0);
if (!data) {
if (errno)
return -errno;
goto nothing;
}
ls = blkid_probe_get_partlist(pr);
if (!ls)
goto nothing;
/* Parent is required, because Minix uses the same PT as DOS and
* difference is only in primary partition (parent) type.
*/
parent = blkid_partlist_get_parent(ls);
if (!parent)
goto nothing;
if (blkid_partition_get_type(parent) != MBR_MINIX_PARTITION)
goto nothing;
if (blkid_partitions_need_typeonly(pr))
/* caller does not ask for details about partitions */
return BLKID_PROBE_OK;
tab = blkid_partlist_new_parttable(ls, "minix", MBR_PT_OFFSET);
if (!tab)
goto err;
for (i = 0, p = mbr_get_partition(data, 0);
i < MINIX_MAXPARTITIONS; i++, p++) {
uint32_t start, size;
blkid_partition par;
if (p->sys_ind != MBR_MINIX_PARTITION)
continue;
start = dos_partition_get_start(p);
size = dos_partition_get_size(p);
if (parent && !blkid_is_nested_dimension(parent, start, size)) {
DBG(LOWPROBE, ul_debug(
"WARNING: minix partition (%d) overflow "
"detected, ignore", i));
continue;
}
par = blkid_partlist_add_partition(ls, tab, start, size);
if (!par)
goto err;
blkid_partition_set_type(par, p->sys_ind);
blkid_partition_set_flags(par, p->boot_ind);
}
return BLKID_PROBE_OK;
nothing:
return BLKID_PROBE_NONE;
err:
return -ENOMEM;
}
/* same as DOS */
const struct blkid_idinfo minix_pt_idinfo =
{
.name = "minix",
.probefunc = probe_minix_pt,
.magics =
{
{ .magic = "\x55\xAA", .len = 2, .sboff = 510 },
{ NULL }
}
};
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