From ba7201c3c30bf9d74db3b54f666ec541661760bf Mon Sep 17 00:00:00 2001
From: Andrew Wilcox <AWilcox@Wilcox-Tech.com>
Date: Sat, 9 Apr 2016 12:47:40 -0500
Subject: Don't strlen(NULL) if environment is unset

---
 getconf/getconf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/getconf/getconf.c b/getconf/getconf.c
index 0f2b5d0..7c789dd 100644
--- a/getconf/getconf.c
+++ b/getconf/getconf.c
@@ -389,7 +389,7 @@ int do_system_var(char *environment, char *system_var)
 {
 	int var;
 
-	if(strlen(environment) != 0)
+	if(environment && strlen(environment) != 0)
 	{
 		fprintf(stderr, "Unsupported environment: %s\n", environment);
 		return EINVAL;
-- 
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