dany/u-boot-megous
1
0
Fork 0
mirror of https://xff.cz/git/u-boot/ synced 2025-09-01 16:52:14 +02:00
Code Issues Packages Projects Releases Wiki Activity

README: U_BOOT_ENV_CALLBACK functions

Browse Source 
Describe the interface of environment variable callback functions.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt
2018-07-29 11:08:14 +02:00
committed by Tom Rini
parent 938b05a5d7
commit 1b04047a87
1 changed files with 11 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
README
View File

@@ -3943,6 +3943,17 @@ If CONFIG_REGEX is defined, the variable_name above is evaluated as a
regular expression. This allows multiple variables to be connected to regular expression. This allows multiple variables to be connected to
the same callback without explicitly listing them all out. the same callback without explicitly listing them all out.
The signature of the callback functions is:
int callback(const char *name, const char *value, enum env_op op, int flags)
* name - changed environment variable
* value - new value of the environment variable
* op - operation (create, overwrite, or delete)
* flags - attributes of the environment variable change, see flags H_* in
include/search.h
The return value is 0 if the variable change is accepted and 1 otherwise.
Command Line Parsing: Command Line Parsing:
===================== =====================