From 4b66dabc76a89a10e4ff07318ff88e3501a4bba5 Mon Sep 17 00:00:00 2001
From: Mark Whitley <markw@lineo.com>
Date: Mon, 23 Apr 2001 17:04:41 +0000
Subject: [PATCH] Added a sanity check to fix weird bug exposed when sourcing
 in commands from a file with lash. Based on report from Heinz Walter.

---
 libbb/trim.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/libbb/trim.c b/libbb/trim.c
index 78cf235dd..d3be62d93 100644
--- a/libbb/trim.c
+++ b/libbb/trim.c
@@ -33,7 +33,11 @@
 
 void trim(char *s)
 {
-	int len=strlen(s);
+	int len = strlen(s);
+
+	/* sanity check */
+	if (len == 0)
+		return;
 
 	/* trim trailing whitespace */
 	while ( len > 0 && isspace(s[len-1]))