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-rw-r--r--util-linux/volume_id/mac.c125
1 files changed, 125 insertions, 0 deletions
diff --git a/util-linux/volume_id/mac.c b/util-linux/volume_id/mac.c
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+++ b/util-linux/volume_id/mac.c
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+/*
+ * volume_id - reads filesystem label and uuid
+ *
+ * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "volume_id_internal.h"
+
+struct mac_driver_desc {
+ uint8_t signature[2];
+ uint16_t block_size;
+ uint32_t block_count;
+} __attribute__((__packed__));
+
+struct mac_partition {
+ uint8_t signature[2];
+ uint16_t res1;
+ uint32_t map_count;
+ uint32_t start_block;
+ uint32_t block_count;
+ uint8_t name[32];
+ uint8_t type[32];
+} __attribute__((__packed__));
+
+int volume_id_probe_mac_partition_map(struct volume_id *id, uint64_t off)
+{
+ const uint8_t *buf;
+ struct mac_driver_desc *driver;
+ struct mac_partition *part;
+
+ dbg("probing at offset 0x%llx", (unsigned long long) off);
+
+ buf = volume_id_get_buffer(id, off, 0x200);
+ if (buf == NULL)
+ return -1;
+
+ part = (struct mac_partition *) buf;
+ if ((memcmp(part->signature, "PM", 2) == 0) &&
+ (memcmp(part->type, "Apple_partition_map", 19) == 0)) {
+ /* linux creates an own subdevice for the map
+ * just return the type if the drive header is missing */
+ volume_id_set_usage(id, VOLUME_ID_PARTITIONTABLE);
+ id->type = "mac_partition_map";
+ return 0;
+ }
+
+ driver = (struct mac_driver_desc *) buf;
+ if (memcmp(driver->signature, "ER", 2) == 0) {
+ /* we are on a main device, like a CD
+ * just try to probe the first partition from the map */
+ unsigned bsize = be16_to_cpu(driver->block_size);
+ int part_count;
+ int i;
+
+ /* get first entry of partition table */
+ buf = volume_id_get_buffer(id, off + bsize, 0x200);
+ if (buf == NULL)
+ return -1;
+
+ part = (struct mac_partition *) buf;
+ if (memcmp(part->signature, "PM", 2) != 0)
+ return -1;
+
+ part_count = be32_to_cpu(part->map_count);
+ dbg("expecting %d partition entries", part_count);
+
+ if (id->partitions != NULL)
+ free(id->partitions);
+ id->partitions =
+ malloc(part_count * sizeof(struct volume_id_partition));
+ if (id->partitions == NULL)
+ return -1;
+ memset(id->partitions, 0x00, sizeof(struct volume_id_partition));
+
+ id->partition_count = part_count;
+
+ for (i = 0; i < part_count; i++) {
+ uint64_t poff;
+ uint64_t plen;
+
+ buf = volume_id_get_buffer(id, off + ((i+1) * bsize), 0x200);
+ if (buf == NULL)
+ return -1;
+
+ part = (struct mac_partition *) buf;
+ if (memcmp(part->signature, "PM", 2) != 0)
+ return -1;
+
+ poff = be32_to_cpu(part->start_block) * bsize;
+ plen = be32_to_cpu(part->block_count) * bsize;
+ dbg("found '%s' partition entry at 0x%llx, len 0x%llx",
+ part->type, (unsigned long long) poff, (unsigned long long) plen);
+
+ id->partitions[i].off = poff;
+ id->partitions[i].len = plen;
+
+ if (memcmp(part->type, "Apple_Free", 10) == 0) {
+ volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_UNUSED);
+ } else if (memcmp(part->type, "Apple_partition_map", 19) == 0) {
+ volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_PARTITIONTABLE);
+ } else {
+ volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_UNPROBED);
+ }
+ }
+ volume_id_set_usage(id, VOLUME_ID_PARTITIONTABLE);
+ id->type = "mac_partition_map";
+ return 0;
+ }
+
+ return -1;
+}