101 lines
2.0 KiB
C
101 lines
2.0 KiB
C
/*
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* Minix partition parsing code
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*
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* Copyright (C) 2009 Karel Zak <kzak@redhat.com>
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*
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* This file may be redistributed under the terms of the
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* GNU Lesser General Public License.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include "partitions.h"
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#include "dos.h"
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#include "minix.h"
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static int probe_minix_pt(blkid_probe pr,
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const struct blkid_idmag *mag __attribute__((__unused__)))
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{
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struct dos_partition *p;
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blkid_parttable tab = NULL;
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blkid_partition parent;
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blkid_partlist ls;
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unsigned char *data;
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int i;
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data = blkid_probe_get_sector(pr, 0);
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if (!data)
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goto nothing;
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ls = blkid_probe_get_partlist(pr);
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if (!ls)
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goto err;
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/* Parent is required, because Minix uses the same PT as DOS and
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* difference is only in primary partition (parent) type.
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*/
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parent = blkid_partlist_get_parent(ls);
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if (!parent)
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goto nothing;
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if (blkid_partition_get_type(parent) != BLKID_MINIX_PARTITION)
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goto nothing;
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if (blkid_partitions_need_typeonly(pr))
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/* caller does not ask for details about partitions */
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return 0;
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p = (struct dos_partition *) (data + BLKID_MSDOS_PT_OFFSET);
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tab = blkid_partlist_new_parttable(ls, "minix", BLKID_MSDOS_PT_OFFSET);
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if (!tab)
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goto err;
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for (i = 0; i < MINIX_MAXPARTITIONS; i++, p++) {
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uint32_t start, size;
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blkid_partition par;
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if (p->sys_type != BLKID_MINIX_PARTITION)
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continue;
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start = dos_partition_start(p);
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size = dos_partition_size(p);
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if (parent && !blkid_is_nested_dimension(parent, start, size)) {
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DBG(DEBUG_LOWPROBE, printf(
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"WARNING: minix partition (%d) overflow "
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"detected, ignore\n", i));
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continue;
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}
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par = blkid_partlist_add_partition(ls, tab, start, size);
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if (!par)
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goto err;
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blkid_partition_set_type(par, p->sys_type);
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blkid_partition_set_flags(par, p->boot_ind);
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}
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return 0;
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nothing:
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return 1;
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err:
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return -1;
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}
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/* same as DOS */
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const struct blkid_idinfo minix_pt_idinfo =
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{
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.name = "minix",
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.probefunc = probe_minix_pt,
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.magics =
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{
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{ .magic = "\x55\xAA", .len = 2, .sboff = 510 },
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{ NULL }
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}
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};
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