common: cli_hush: Restore clear local variable support
The u-boot hush shell doesn’t support the unset command to clear a
variable and therefore an empty value ("c=") should be a valid value
for the set_local_var function to clear the variable. This partial
reverts commit aa722529635c ("common: cli_hush: avoid dead code") and
only checks for a `=` in the string. Additionally explicit call the
unset_local_var function to remove the variable if the value is empty.
Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/common/cli_hush.c b/common/cli_hush.c
index 1ad7a50..171069f 100644
--- a/common/cli_hush.c
+++ b/common/cli_hush.c
@@ -2171,12 +2171,18 @@
* NAME=VALUE format. So the first order of business is to
* split 's' on the '=' into 'name' and 'value' */
value = strchr(name, '=');
- if (value == NULL || *(value + 1) == 0) {
+ if (!value) {
free(name);
return -1;
}
*value++ = 0;
+ if (!*value) {
+ unset_local_var(name);
+ free(name);
+ return 0;
+ }
+
for(cur = top_vars; cur; cur = cur->next) {
if(strcmp(cur->name, name)==0)
break;