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(+)
diff --git a/cmd/part.c b/cmd/part.c index 9d419c967c..26b0cc84fe 100644 --- a/cmd/part.c +++ b/cmd/part.c @@ -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" ); diff --git a/doc/usage/cmd/part.rst b/doc/usage/cmd/part.rst index 0d098c7e3f..85cca0f0c7 100644 --- a/doc/usage/cmd/part.rst +++ b/doc/usage/cmd/part.rst @@ -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