C++ (Cpp) blkid_partitions_get_flags Examples

Example #1

/*
 * Protective (legacy) MBR.
 *
 * This MBR contains standard DOS partition table with a single partition, type
 * of 0xEE.  The partition usually encompassing the entire GPT drive - or 2TiB
 * for large disks.
 *
 * Note that Apple uses GPT/MBR hybrid disks, where the DOS partition table is
 * synchronized with GPT. This synchronization has many restriction of course
 * (due DOS PT limitations).
 *
 * Note that the PMBR detection is optional (enabled by default) and could be
 * disabled by BLKID_PARTS_FOPCE_GPT flag (see also blkid_partitions_set_flags()).
 */
static int is_pmbr_valid(blkid_probe pr, int *has)
{
	int flags = blkid_partitions_get_flags(pr);
	unsigned char *data;
	struct dos_partition *p;
	int i;

	if (has)
		*has = 0;
	if (flags & BLKID_PARTS_FORCE_GPT)
		goto ok;			/* skip PMBR check */

	data = blkid_probe_get_sector(pr, 0);
	if (!data) {
		if (errno)
			return -errno;
		goto failed;
	}

	if (!mbr_is_valid_magic(data))
		goto failed;

	for (i = 0, p = mbr_get_partition(data, 0); i < 4; i++, p++) {
		if (p->sys_ind == MBR_GPT_PARTITION)
			goto ok;
	}
failed:
	return 0;
ok:
	if (has)
		*has = 1;
	return 1;
}

Example #2

File: gpt.c Project: AnunkunramA/util-linux

/*
 * Protective (legacy) MBR.
 *
 * This MBR contains standard DOS partition table with a single partition, type
 * of 0xEE.  The partition usually encompassing the entire GPT drive - or 2TiB
 * for large disks.
 *
 * Note that Apple uses GPT/MBR hybrid disks, where the DOS partition table is
 * synchronized with GPT. This synchronization has many restriction of course
 * (due DOS PT limitations).
 *
 * Note that the PMBR detection is optional (enabled by default) and could be
 * disabled by BLKID_PARTS_FOPCE_GPT flag (see also blkid_paertitions_set_flags()).
 */
static int is_pmbr_valid(blkid_probe pr)
{
	int flags = blkid_partitions_get_flags(pr);
	unsigned char *data;
	struct dos_partition *p;
	int i;

	if (flags & BLKID_PARTS_FORCE_GPT)
		goto ok;			/* skip PMBR check */

	data = blkid_probe_get_sector(pr, 0);
	if (!data)
		goto failed;

	if (!is_valid_mbr_signature(data))
		goto failed;

	p = (struct dos_partition *) (data + BLKID_MSDOS_PT_OFFSET);

	for (i = 0; i < 4; i++, p++) {
		if (p->sys_type == BLKID_GPT_PARTITION)
			goto ok;
	}
failed:
	return 0;
ok:
	return 1;
}