mirror of
https://gitlab.com/cryptsetup/cryptsetup.git
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159 lines
3.0 KiB
C
159 lines
3.0 KiB
C
/*
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* blkid probe utilities
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*
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* Copyright (C) 2018, Red Hat, Inc. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "utils_blkid.h"
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#ifdef HAVE_BLKID
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#include <blkid/blkid.h>
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struct blkid_handle {
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int fd;
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blkid_probe pr;
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};
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#endif
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void blk_set_chains_for_fast_detection(struct blkid_handle *h)
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{
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#ifdef HAVE_BLKID
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blkid_probe_enable_partitions(h->pr, 1);
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blkid_probe_set_partitions_flags(h->pr, 0);
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blkid_probe_enable_superblocks(h->pr, 1);
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blkid_probe_set_superblocks_flags(h->pr, BLKID_SUBLKS_TYPE);
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#endif
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}
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int blk_init_by_path(struct blkid_handle **h, const char *path)
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{
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int r = -ENOTSUP;
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#ifdef HAVE_BLKID
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struct blkid_handle *tmp = malloc(sizeof(*h));
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if (!tmp)
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return -ENOMEM;
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tmp->fd = -1;
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tmp->pr = blkid_new_probe_from_filename(path);
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if (!tmp->pr) {
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free(tmp);
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return -EINVAL;
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}
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*h = tmp;
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r = 0;
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#endif
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return r;
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}
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int blk_superblocks_filter_luks(struct blkid_handle *h)
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{
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int r = -ENOTSUP;
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#ifdef HAVE_BLKID
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char *luks_filter[] = {
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"crypto_LUKS",
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NULL
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};
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r = blkid_probe_filter_superblocks_type(h->pr, BLKID_FLTR_NOTIN, luks_filter);
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#endif
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return r;
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}
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blk_probe_status blk_safeprobe(struct blkid_handle *h)
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{
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int r = -1;
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#ifdef HAVE_BLKID
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r = blkid_do_safeprobe(h->pr);
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#endif
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switch (r) {
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case -2:
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return PRB_AMBIGUOUS;
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case 1:
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return PRB_EMPTY;
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case 0:
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return PRB_OK;
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default:
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return PRB_FAIL;
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}
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}
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int blk_is_partition(struct blkid_handle *h)
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{
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int r = 0;
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#ifdef HAVE_BLKID
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r = blkid_probe_has_value(h->pr, "PTTYPE");
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#endif
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return r;
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}
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int blk_is_superblock(struct blkid_handle *h)
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{
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int r = 0;
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#ifdef HAVE_BLKID
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r = blkid_probe_has_value(h->pr, "TYPE");
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#endif
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return r;
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}
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const char *blk_get_partition_type(struct blkid_handle *h)
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{
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const char *value = NULL;
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#ifdef HAVE_BLKID
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(void) blkid_probe_lookup_value(h->pr, "PTTYPE", &value, NULL);
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#endif
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return value;
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}
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const char *blk_get_superblock_type(struct blkid_handle *h)
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{
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const char *value = NULL;
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#ifdef HAVE_BLKID
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(void) blkid_probe_lookup_value(h->pr, "TYPE", &value, NULL);
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#endif
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return value;
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}
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void blk_free(struct blkid_handle *h)
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{
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#ifdef HAVE_BLKID
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if (!h)
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return;
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if (h->pr)
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blkid_free_probe(h->pr);
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free(h);
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#endif
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}
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int blk_supported(void)
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{
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int r = 0;
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#ifdef HAVE_BLKID
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r = 1;
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#endif
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return r;
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}
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