1 files changed, 125 insertions, 0 deletions

diff --git a/util-linux/volume_id/mac.c b/util-linux/volume_id/mac.c
new file mode 100644
index 000000000..94a99bee0
--- /dev/null
+++ b/util-linux/volume_id/mac.c
@@ -0,0 +1,125 @@
+/*
+ * 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;
+}