From: Jeffrey Mann <mannj@embeddedplanet.com>
Date: Mon, 23 Apr 2007 12:00:11 +0000 (+0200)
Subject: [patch] setenv(...) can delete environmentalvariables
X-Git-Tag: v1.3.0-rc1~85
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=9ffd451afeb08e5be7ddae680487ec962b2bca25;p=u-boot

[patch] setenv(...) can delete environmentalvariables

update setenv() function so that entering a NULL value for the
variable's value will delete the environmental variable

Signed-off-by: Jeffrey Mann <mannj@embeddedplanet.com>
Acked-by: Stefan Roese <sr@denx.de>
---

diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c
index 9834ba65b7..977ec5bae9 100644
--- a/common/cmd_nvedit.c
+++ b/common/cmd_nvedit.c
@@ -391,7 +391,10 @@ int _do_setenv (int flag, int argc, char *argv[])
 void setenv (char *varname, char *varvalue)
 {
 	char *argv[4] = { "setenv", varname, varvalue, NULL };
-	_do_setenv (0, 3, argv);
+	if (varvalue == NULL)
+		_do_setenv (0, 2, argv);
+	else
+		_do_setenv (0, 3, argv);
 }
 
 int do_setenv ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])