Those commands basis on implementation of random UUID generator version 4
which is described in RFC4122. The same algorithm is used for generation
both ids but string representation is different as below.
char: 0 9 14 19 24 36
xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
UUID: be be be be be
GUID: le le le be be
Commands usage:
- uuid <varname(optional)>
- guid <varname(optional)>
The result is saved in environment as a "varname" variable if argument is given,
if not then its printed.
New config:
- CONFIG_CMD_UUID
Signed-off-by: Przemyslaw Marczak <p.marc...@samsung.com>
Cc: Stephen Warren <swar...@nvidia.com>
Cc: Lukasz Majewski <l.majew...@samsung.com>
Cc: tr...@ti.com
---
Changes v4:
- new commit
---
README | 2 +-
include/common.h | 4 +++-
lib/Makefile | 2 ++
lib/uuid.c | 44 +++++++++++++++++++++++++++++++++++++++++++-
4 files changed, 49 insertions(+), 3 deletions(-)
diff --git a/README b/README
index 216f0c7..f69b94e 100644
--- a/README
+++ b/README
@@ -1012,7 +1012,7 @@ The following options need to be configured:
CONFIG_CMD_CDP * Cisco Discover Protocol support
CONFIG_CMD_MFSL * Microblaze FSL support
CONFIG_CMD_XIMG Load part of Multi Image
-
+ CONFIG_CMD_UUID * Generate random UUID or GUID string
EXAMPLE: If you want all functions except of network
support you can write:
diff --git a/include/common.h b/include/common.h
index deb08f2..de748f1 100644
--- a/include/common.h
+++ b/include/common.h
@@ -831,7 +831,9 @@ char * strmhz(char *buf, unsigned long hz);
#if defined(CONFIG_RANDOM_MACADDR) || \
defined(CONFIG_BOOTP_RANDOM_DELAY) || \
defined(CONFIG_CMD_LINK_LOCAL) || \
- defined(CONFIG_RANDOM_UUID)
+ defined(CONFIG_RANDOM_UUID) || \
+ defined(CONFIG_CMD_UUID)
+
#define RAND_MAX -1U
void srand(unsigned int seed);
unsigned int rand(void);
diff --git a/lib/Makefile b/lib/Makefile
index fd75e80..b85c825 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -65,6 +65,8 @@ obj-$(CONFIG_PARTITION_UUIDS) += uuid.o
obj-y += vsprintf.o
obj-$(CONFIG_RANDOM_UUID) += uuid.o
obj-$(CONFIG_RANDOM_UUID) += rand.o
+obj-$(CONFIG_CMD_UUID) += uuid.o
+obj-$(CONFIG_CMD_UUID) += rand.o
obj-$(CONFIG_RANDOM_MACADDR) += rand.o
obj-$(CONFIG_BOOTP_RANDOM_DELAY) += rand.o
obj-$(CONFIG_CMD_LINK_LOCAL) += rand.o
diff --git a/lib/uuid.c b/lib/uuid.c
index d3ba60e..0112b03 100644
--- a/lib/uuid.c
+++ b/lib/uuid.c
@@ -4,6 +4,7 @@
* SPDX-License-Identifier: GPL-2.0+
*/
+#include <common.h>
#include <linux/ctype.h>
#include <errno.h>
#include <common.h>
@@ -172,7 +173,7 @@ void uuid_bin_to_str(unsigned char *uuid_bin, char
*uuid_str,
*
* @param uuid_bin - pointer to allocated array [16B]. Output is in big endian.
*/
-#ifdef CONFIG_RANDOM_UUID
+#if defined(CONFIG_RANDOM_UUID) || defined(CONFIG_CMD_UUID)
void gen_rand_uuid(unsigned char *uuid_bin)
{
struct uuid uuid;
@@ -211,4 +212,45 @@ void gen_rand_uuid_str(char *uuid_str, uuid_str_t
str_format)
/* Convert UUID bin to UUID or GUID formated STRING */
uuid_bin_to_str(uuid_bin, uuid_str, str_format);
}
+
+#ifdef CONFIG_CMD_UUID
+int do_uuid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ char uuid[UUID_STR_LEN + 1];
+ uuid_str_t str_format;
+
+ if (!strcmp(argv[0], "uuid"))
+ str_format = UUID_STR_FORMAT_STD;
+ else
+ str_format = UUID_STR_FORMAT_GUID;
+
+ if (argc == 1) {
+ gen_rand_uuid_str(uuid, str_format);
+ printf("%s\n", uuid);
+ } else if (argc == 2) {
+ gen_rand_uuid_str(uuid, str_format);
+ setenv(argv[1], uuid);
+ } else {
+ return CMD_RET_USAGE;
+ }
+
+ return CMD_RET_SUCCESS;
+}
+
+U_BOOT_CMD(uuid, CONFIG_SYS_MAXARGS, 1, do_uuid,
+ "UUID - generate Universally Unique Identifier version 4",
+ "<varname(optional)>\n"
+ "Argument:\n"
+ "varname: for set result in a environment variable\n"
+ "e.g. uuid uuid_env"
+);
+
+U_BOOT_CMD(guid, CONFIG_SYS_MAXARGS, 1, do_uuid,
+ "GUID - generate Globally Unique Identifier based on UUID version 4",
+ "<varname(optional)>\n"
+ "Argument:\n"
+ "varname: for set result in a environment variable\n"
+ "e.g. guid guid_env"
+);
+#endif
#endif
--
1.9.0
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