@@ -182,6 +182,29 @@ static int do_part_number(int argc, char *const argv[])
return do_part_info(argc, argv, CMD_PART_INFO_NUMBER);
}
+static int do_part_type(int argc, char *const argv[])
+{
+ int part;
+ struct blk_desc *dev_desc;
+ struct disk_partition info;
+
+ if (argc < 2)
+ return CMD_RET_USAGE;
+ if (argc > 3)
+ return CMD_RET_USAGE;
+
+ part = blk_get_device_part_str(argv[0], argv[1], &dev_desc, &info, 0);
+ if (part < 0)
+ return 1;
+
+ if (argc > 2)
+ env_set(argv[2], info.type_guid);
+ else
+ printf("%s\n", info.type_guid);
+
+ return 0;
+}
+
static int do_part_types(int argc, char * const argv[])
{
struct part_driver *drv = ll_entry_start(struct part_driver,
@@ -218,6 +241,8 @@ static int do_part(struct cmd_tbl *cmdtp, int flag, int argc,
return do_part_size(argc - 2, argv + 2);
else if (!strcmp(argv[1], "number"))
return do_part_number(argc - 2, argv + 2);
+ else if (!strcmp(argv[1], "type"))
+ return do_part_type(argc - 2, argv + 2);
else if (!strcmp(argv[1], "types"))
return do_part_types(argc - 2, argv + 2);
return CMD_RET_USAGE;
@@ -244,6 +269,10 @@ U_BOOT_CMD(
"part number <interface> <dev> <part> <varname>\n"
" - set environment variable to the partition number using the partition name\n"
" part must be specified as partition name\n"
+ "part type <interface> <dev>:<part>\n"
+ " - print partition type\n"
+ "part type <interface> <dev>:<part> <varname>\n"
+ " - set environment variable to partition type\n"
"part types\n"
" - list supported partition table types"
);
@@ -13,6 +13,7 @@ Synopis
part start <interface> <dev> <part> <varname>
part size <interface> <dev> <part> <varname>
part number <interface> <dev> <part> <varname>
+ part type <interface> <dev>:<part> [varname]
part types
Description
@@ -81,6 +82,17 @@ part must be specified as partition name.
varname
a variable to store the current partition number value into
+The 'part type' command prints or sets an environment variable to the partition type UUID.
+
+ interface
+ interface for accessing the block device (mmc, sata, scsi, usb, ....)
+ dev
+ device number
+ part
+ partition number
+ varname
+ a variable to store the current partition type UUID value into
+
The 'part types' command list supported partition table types.
Example
This implements the following command: part type mmc 0:1 -> print partition type UUID part type mmc 0:1 uuid -> set environment variable to partition type UUID "part type" can be useful when writing a bootcmd which searches for a specific partition type to enable automatic discovery of partitions and their intended usage or mount point. Signed-off-by: Enric Balletbo i Serra <eballetbo@redhat.com> --- (no changes since v1) cmd/part.c | 29 +++++++++++++++++++++++++++++ doc/usage/cmd/part.rst | 12 ++++++++++++ 2 files changed, 41 insertions(+)