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 <eballe...@redhat.com>
Reviewed-by: Simon Glass <s...@chromium.org>
---
(no changes since v1)
cmd/part.c | 29 +++++++++++++++++++++++++++++
doc/usage/cmd/part.rst | 18 ++++++++++++++++++
2 files changed, 47 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 ed464b180b..8d2a280391 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.
Examples
@@ -126,6 +138,12 @@ Examples
=> env print varname
varname=0x2
=>
+ => part type host 0:1
+ ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
+ => part type host 0:1 varname
+ => env print varname
+ varname=ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
+ =>
=> part types
Supported partition tables: EFI, AMIGA, DOS, ISO, MAC
--
2.39.0
