(decode_switches): Ignore value of COLUMNS envionment

variable when it is the empty string.  Suggestion from Ulrich Drepper.

diff --git a/src/ls.c b/src/ls.c
index 67e3723..ec051c2 100644 (file)
--- a/src/ls.c
+++ b/src/ls.c
@@ -825,7 +825,7 @@ decode_switches (int argc, char **argv)
   quote_as_string = 0;
 
   line_length = 80;
-  if ((p = getenv ("COLUMNS")))
+  if ((p = getenv ("COLUMNS")) && *p)
     {
       if (xstrtol (p, NULL, 0, &tmp_long, NULL) == LONGINT_OK
          && 0 < tmp_long && tmp_long <= INT_MAX)