Describe the interface of environment variable callback functions.
Signed-off-by: Heinrich Schuchardt xypron.glpk@gmx.de --- README | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/README b/README index aee0f7371c4..179d6d74a4a 100644 --- a/README +++ b/README @@ -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 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: =====================