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new commands: uuid and guid - generate random unique identifier

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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>]
- guid [<varname>]

The result is saved in environment as a "varname" variable if argument is given,
if not then it is printed.

New config:
- CONFIG_CMD_UUID

Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
Cc: Stephen Warren <swarren@nvidia.com>
Cc: Lukasz Majewski <l.majewski@samsung.com>
Cc: trini@ti.com
This commit is contained in:
Przemyslaw Marczak 2014-04-02 10:20:05 +02:00 • committed by Tom Rini
parent 4e4815feae
commit 89c8230dec
3 changed files with 49 additions and 5 deletions
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8
include/config_fallbacks.h
View file

@ -58,14 +58,16 @@
#if (defined(CONFIG_PARTITION_UUIDS) || \
defined(CONFIG_EFI_PARTITION) || \
defined(CONFIG_RANDOM_UUID) || \
defined(CONFIG_CMD_UUID) || \
defined(CONFIG_BOOTP_PXE)) && \
!defined(CONFIG_LIB_UUID)
#define CONFIG_LIB_UUID
#endif
#if defined(CONFIG_RANDOM_UUID) && \
!defined(CONFIG_LIB_RAND) && \
!defined(CONFIG_LIB_HW_RAND)
#if (defined(CONFIG_RANDOM_UUID) || \
defined(CONFIG_CMD_UUID)) && \
(!defined(CONFIG_LIB_RAND) && \
!defined(CONFIG_LIB_HW_RAND))
#define CONFIG_LIB_RAND
#endif