static const char *detect_fs(const char *path)
{
int fd;
const char *ret;
fd = open(path, O_RDONLY);
if (fd < 0) {
dbg_perror("open");
return 0;
}
if (is_vfat(fd))
ret = "vfat";
else if (is_iso9660(fd))
ret = "iso9660";
else
ret = is_extN(fd);
close(fd);
return ret;
}
device_instance *
pk_disklabel_create_instance(device_instance *raw_disk,
const char *args)
{
int partition;
char *filename;
/* parse the arguments */
if (args == NULL) {
partition = 0;
filename = NULL;
}
else {
partition = strtoul((char*)args, &filename, 0);
if (filename == args)
partition = -1; /* not specified */
if (*filename == ',')
filename++;
if (*filename == '\0')
filename = NULL; /* easier */
}
if (partition == 0) {
/* select the raw disk */
return raw_disk;
}
else {
unsigned8 boot_block[512];
/* get the boot block for examination */
if (device_instance_seek(raw_disk, 0, 0) < 0)
device_error(device_instance_device(raw_disk),
"Problem seeking on raw disk");
if (device_instance_read(raw_disk, &boot_block, sizeof(boot_block))
!= sizeof(boot_block))
device_error(device_instance_device(raw_disk), "Problem reading boot block");
if (partition < 0) {
/* select the active partition */
if (block0_is_bpb(boot_block)) {
device_error(device_instance_device(raw_disk), "Unimplemented active BPB");
}
else if (block0_is_fdisk(boot_block)) {
int active = block0_is_fdisk(boot_block);
device_error(device_instance_device(raw_disk), "Unimplemented active FDISK (%d)",
active);
}
else if (is_iso9660(raw_disk)) {
device_error(device_instance_device(raw_disk), "Unimplemented active ISO9660");
}
else if (block0_is_mac_disk(boot_block)) {
device_error(device_instance_device(raw_disk), "Unimplemented active MAC DISK");
}
else {
device_error(device_instance_device(raw_disk), "Unreconized bootblock");
}
}
else {
/* select the specified disk partition */
if (block0_is_bpb(boot_block)) {
device_error(device_instance_device(raw_disk), "Unimplemented BPB");
}
else if (block0_is_fdisk(boot_block)) {
/* return an instance */
ppcboot_partition_t *partition_table = (ppcboot_partition_t*) &boot_block[446];
ppcboot_partition_t *partition_entry;
disklabel *label;
if (partition > 4)
device_error(device_instance_device(raw_disk),
"Only FDISK partitions 1..4 supported");
partition_entry = &partition_table[partition - 1];
label = ZALLOC(disklabel);
label->raw_disk = raw_disk;
label->pos = 0;
label->sector_begin = 512 * sector2uw(partition_entry->sector_begin);
label->sector_length = 512 * sector2uw(partition_entry->sector_length);
PTRACE(disklabel, ("partition %ld, sector-begin %ld, length %ld\n",
(long)partition,
(long)label->sector_begin,
(long)label->sector_length));
if (filename != NULL)
device_error(device_instance_device(raw_disk),
"FDISK file names not yet supported");
return device_create_instance_from(NULL, raw_disk,
label,
NULL, args,
&package_disklabel_callbacks);
}
else if (block0_is_mac_disk(boot_block)) {
device_error(device_instance_device(raw_disk), "Unimplemented MAC DISK");
}
else {
device_error(device_instance_device(raw_disk),
"Unreconized bootblock");
}
}
}
return NULL;
}
