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/* partread
* Copyright 2012 Red Hat Inc.
*
* 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, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <stdio.h>
#include <fcntl.h>
#include "mbr.h"
#include "gpt.h"
int main(int argc, const char *argv[])
{
int r;
if (argc != 2) {
fprintf(stderr, "Usage: %s <drive>\n", argv[0]);
return 1;
}
int fd = open(argv[1], O_RDONLY);
if (fd == -1) {
fprintf(stderr, "Failed to open %s: %m", argv[1]);
return 1;
}
mbr_t mbr;
r = mbr_read(fd, &mbr);
if (r < 0) {
switch (r) {
case -MBR_ERROR_INVALID:
fprintf(stderr, "Didn't detect an MBR\n");
break;
case -MBR_ERROR_READ:
fprintf(stderr, "Error reading from %s: %m\n", argv[1]);
break;
default:
fprintf(stderr, "Unknown error reading mbr\n");
}
return 1;
}
printf("Disk Signature: %08X\n", mbr.signature);
for (int i = 0; i < 4; i++) {
mbr_part_t *part = &mbr.part[i];
printf("Partition %u\n", i);
if (part->type == MBR_PART_EMPTY) {
printf(" Empty\n");
continue;
}
printf(" Type: %02X\n", part->type);
printf(" First Cylinder: %hu\n", part->first_cylinder);
printf(" First Head: %hhu\n", part->first_head);
printf(" First Sector: %hhu\n", part->first_sector);
printf(" Last Cylinder: %hu\n", part->last_cylinder);
printf(" Last Head: %hhu\n", part->last_head);
printf(" Last Sector: %hhu\n", part->last_sector);
printf(" First LB: %u\n", part->first_lba);
printf(" No. Sectors: %u\n", part->n_sectors);
}
if (mbr.part[0].type != MBR_PART_EFI_PROTECTIVE) return 0;
printf("\nDisk has a GPT header\n");
gpt_handle_t *h;
r = gpt_open(fd, &h);
if (r != 0) {
fprintf(stderr, "Error opening GPT: %i\n", r);
return 1;
}
gpt_t gpt;
gpt_get_header(h, &gpt);
char uuid[37];
uuid_unparse(gpt.disk_guid, uuid);
printf("Disk GUID: %s\n", uuid);
printf("First usable LBA: %lu\n", gpt.first_usable_lba);
printf("Last usable LBA: %lu\n", gpt.last_usable_lba);
printf("PTE Array Length: %u\n", gpt.pte_array_len);
printf("PTE Size: %u\n", gpt.pte_size);
for (int i = 0; i < gpt.pte_array_len; i++) {
gpt_pte_t pte;
r = gpt_get_pte(h, i, &pte);
if (r < 0) {
fprintf(stderr, "Error fetching partition %i: %i\n", i, r);
return 1;
}
if (uuid_is_null(pte.type)) continue;
printf("\nPTE %i\n", i);
uuid_unparse(pte.type, uuid);
printf(" Type: %s\n", uuid);
uuid_unparse(pte.guid, uuid);
printf(" GUID: %s\n", uuid);
printf(" First LBA: %lu\n", pte.first_lba);
printf(" Last LBA: %lu\n", pte.last_lba);
printf(" Flags: %lX\n", pte.flags);
printf(" Name: %s\n", pte.name);
}
gpt_close(h);
return 0;
}
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