diff options
Diffstat (limited to 'extras/volume_id/libvolume_id/mac.c')
| -rw-r--r-- | extras/volume_id/libvolume_id/mac.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/extras/volume_id/libvolume_id/mac.c b/extras/volume_id/libvolume_id/mac.c new file mode 100644 index 0000000000..99bcbde6be --- /dev/null +++ b/extras/volume_id/libvolume_id/mac.c @@ -0,0 +1,132 @@ +/* + * volume_id - reads filesystem label and uuid + * + * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation version 2 of the License. + */ + +#ifndef _GNU_SOURCE +#define _GNU_SOURCE 1 +#endif + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <string.h> +#include <errno.h> +#include <ctype.h> + +#include "volume_id.h" +#include "logging.h" +#include "util.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 int 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; +} |