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#include <stdio.h>
#include <string.h>
#include <parted/parted.h>
int
main(int argc, char *argv[])
{
const char *bootdisk;
int bootpart = -1;
PedDevice *dev;
PedDisk *disk;
PedPartition *part;
int i;
if (argc <= 1) {
fprintf(stderr, "Usage: ensure-active BOOTDISK [BOOTPART]\n");
return 1;
}
bootdisk = argv[1];
if (argc > 2 && *argv[2]) {
char *end;
bootpart = strtol(argv[2], &end, 0);
if (*end || bootpart < 1 || bootpart > 4)
bootpart = -1;
}
ped_exception_fetch_all();
dev = ped_device_get(bootdisk);
if (!dev) {
fprintf(stderr, "Can't open %s\n", bootdisk);
return 1;
}
disk = ped_disk_new(dev);
if (!disk || !disk->type || !disk->type->name) {
fprintf(stderr, "Can't read partition table from %s\n",
bootdisk);
return 1;
}
if (strcmp(disk->type->name, "msdos") != 0) {
/* this only matters for DOS partition tables */
fprintf(stderr, "No DOS partition table on %s; nothing to do\n",
bootdisk);
return 0;
}
for (part = ped_disk_next_partition(disk, NULL); part;
part = ped_disk_next_partition(disk, part)) {
if (ped_partition_is_active(part) &&
ped_partition_get_flag(part, PED_PARTITION_BOOT)) {
printf("Partition %d of %s is already active\n",
part->num, bootdisk);
return 0;
}
}
if (bootpart) {
part = ped_disk_get_partition(disk, bootpart);
if (part && ped_partition_is_active(part)) {
printf("Setting partition %d of %s to active... ",
bootpart, bootdisk);
ped_exception_fetch_all();
ped_partition_set_flag(part, PED_PARTITION_BOOT, 1);
ped_exception_leave_all();
if (ped_exception) {
ped_exception_catch();
puts("failed.");
} else {
ped_disk_commit(disk);
puts("done.");
return 0;
}
}
}
/* We don't care at this point; just pick the first primary
* partition that exists.
*/
for (i = 1; i <= 4; ++i) {
part = ped_disk_get_partition(disk, i);
if (!part || !ped_partition_is_active(part))
continue;
printf("Setting partition %d of %s to active... ",
i, bootdisk);
ped_exception_fetch_all();
ped_partition_set_flag(part, PED_PARTITION_BOOT, 1);
ped_exception_leave_all();
if (ped_exception) {
ped_exception_catch();
if (i < 4)
puts("failed; trying next primary partition.");
else
puts("failed.");
continue;
}
ped_disk_commit(disk);
puts("done.");
return 0;
}
fputs("Failed to make any primary partition active. Hope your BIOS "
"doesn't mind there being no active partition!\n", stderr);
return 1;
}
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