mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-11 13:56:30 +00:00
f9178e19a1
The 'Configuration' heading should be on level 2, not on level 1.
Fixes: eaa268589e ("doc: man-page for the printenv command")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
90 lines
2 KiB
ReStructuredText
90 lines
2 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0+:
|
|
|
|
printenv command
|
|
================
|
|
|
|
Synopsis
|
|
--------
|
|
|
|
::
|
|
|
|
printenv [-a] [name ...]
|
|
printenv -e [-guid guid][-n] [name]
|
|
|
|
Description
|
|
-----------
|
|
|
|
The printenv command is used to print environment or UEFI variables.
|
|
|
|
\-a
|
|
Print environment variables starting with a period ('.').
|
|
|
|
\-e
|
|
Print UEFI variables. Without -e environment variables are printed.
|
|
|
|
\-guid *guid*
|
|
Specify vendor GUID *guid*. If none is specified, all UEFI variables with
|
|
the specified name are printed irrespective of their vendor GUID.
|
|
|
|
\-n
|
|
don't show hexadecimal dump of value
|
|
|
|
name
|
|
Variable name. If no name is provided, all variables are printed.
|
|
Multiple environment variable names may be specified.
|
|
|
|
Examples
|
|
--------
|
|
|
|
The following examples demonstrates the effect of the *-a* flag when displaying
|
|
environment variables:
|
|
|
|
::
|
|
|
|
=> setenv .foo bar
|
|
=> printenv
|
|
arch=sandbox
|
|
baudrate=115200
|
|
board=sandbox
|
|
...
|
|
stdout=serial,vidconsole
|
|
|
|
Environment size: 644/8188 bytes
|
|
=> printenv -a
|
|
.foo=bar
|
|
arch=sandbox
|
|
baudrate=115200
|
|
board=sandbox
|
|
...
|
|
stdout=serial,vidconsole
|
|
|
|
Environment size: 653/8188 bytes
|
|
=>
|
|
|
|
The next example shows the effect of the *-n* flag when displaying an UEFI
|
|
variable and how to specify a vendor GUID:
|
|
|
|
::
|
|
|
|
=> printenv -e -guid 8be4df61-93ca-11d2-aa0d-00e098032b8c PlatformLangCodes
|
|
PlatformLangCodes:
|
|
8be4df61-93ca-11d2-aa0d-00e098032b8c (EFI_GLOBAL_VARIABLE_GUID)
|
|
BS|RT|RO, DataSize = 0x6
|
|
00000000: 65 6e 2d 55 53 00 en-US.
|
|
=> printenv -e -n PlatformLangCodes
|
|
PlatformLangCodes:
|
|
8be4df61-93ca-11d2-aa0d-00e098032b8c (EFI_GLOBAL_VARIABLE_GUID)
|
|
BS|RT|RO, DataSize = 0x6
|
|
=>
|
|
|
|
Configuration
|
|
-------------
|
|
|
|
UEFI variables are only supported if CONFIG_CMD_NVEDIT_EFI=y. The value of UEFI
|
|
variables can only be displayed if CONFIG_HEXDUMP=y.
|
|
|
|
Return value
|
|
------------
|
|
|
|
The return value $? is 1 (false) if a specified variable is not found.
|
|
Otherwise $? is set to 0 (true).
|