Added a sanity check to fix weird bug exposed when sourcing in commands from a

file with lash. Based on report from Heinz Walter.

diff --git a/libbb/trim.c b/libbb/trim.c
index 78cf235dd006cae01c326006d69e2d79e24f3e18..d3be62d9381dbf3a070b9f17a3f86edbc5492ea1 100644 (file)
--- 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]))