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probe: Support probing for msdos PARTUUID

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Extend partition UUID probing support in GRUB core to display pseudo
partition UUIDs for MBR (MSDOS) partitions.

Signed-off-by: Nicholas Vinson <nvinson234@gmail.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Nicholas Vinson 2019-09-30 08:27:59 -04:00 committed by Daniel Kiper
parent ff3e91be9c
commit c7cb11b219
1 changed files with 29 additions and 14 deletions
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43
grub-core/commands/probe.c
View file

@ -32,6 +32,7 @@
#include <grub/env.h>
#include <grub/extcmd.h>
#include <grub/i18n.h>
#include <grub/i386/pc/boot.h>
GRUB_MOD_LICENSE ("GPLv3+");
@ -104,26 +105,40 @@ grub_cmd_probe (grub_extcmd_context_t ctxt, int argc, char **args)
{
/* AAAABBBB-CCCC-DDDD-EEEE-FFFFFFFFFFFF + null terminator */
char val[37] = "none";
if (dev->disk && dev->disk->partition &&
grub_strcmp(dev->disk->partition->partmap->name, "gpt") == 0)
if (dev->disk && dev->disk->partition)
{
struct grub_gpt_partentry entry;
struct grub_partition *p = dev->disk->partition;
grub_disk_t disk = grub_disk_open(dev->disk->name);
if (!disk)
return grub_errno;
if (grub_disk_read(disk, p->offset, p->index, sizeof(entry), &entry))
return grub_errno;
if (grub_strcmp(dev->disk->partition->partmap->name, "gpt") == 0)
{
struct grub_gpt_partentry entry;
grub_gpt_part_guid_t *guid;
if (grub_disk_read(disk, p->offset, p->index, sizeof(entry), &entry))
return grub_errno;
guid = &entry.guid;
grub_snprintf (val, sizeof(val),
"%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
grub_le_to_cpu32 (guid->data1),
grub_le_to_cpu16 (guid->data2),
grub_le_to_cpu16 (guid->data3),
guid->data4[0], guid->data4[1], guid->data4[2],
guid->data4[3], guid->data4[4], guid->data4[5],
guid->data4[6], guid->data4[7]);
}
else if (grub_strcmp(dev->disk->partition->partmap->name, "msdos") == 0)
{
grub_uint32_t nt_disk_sig;
if (grub_disk_read(disk, 0, GRUB_BOOT_MACHINE_WINDOWS_NT_MAGIC,
sizeof(nt_disk_sig), &nt_disk_sig) == 0)
grub_snprintf (val, sizeof(val), "%08x-%02x",
grub_le_to_cpu32(nt_disk_sig), 1 + p->number);
}
grub_disk_close(disk);
grub_gpt_part_guid_t *guid = &entry.guid;
grub_snprintf (val, sizeof(val),
"%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
grub_le_to_cpu32 (guid->data1),
grub_le_to_cpu16 (guid->data2),
grub_le_to_cpu16 (guid->data3),
guid->data4[0], guid->data4[1], guid->data4[2],
guid->data4[3], guid->data4[4], guid->data4[5],
guid->data4[6], guid->data4[7]);
}
if (state[0].set)
grub_env_set (state[0].arg, val);