1 files changed, 5 insertions, 4 deletions

diff --git a/shell/hush.c b/shell/hush.c
index 42f95ef6b..cdc3a8618 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -9897,12 +9897,13 @@ Test that VAR is a valid variable name?
                 return EXIT_FAILURE;
         }
 
-        if (optstring[0] == ':') {
-                opterr = 0;
-        } else {
+        c = 0;
+        if (optstring[0] != ':') {
                 cp = get_local_var_value("OPTERR");
-                opterr = cp ? atoi(cp) : 1;
+                /* 0 if "OPTERR=0", 1 otherwise */
+                c = (!cp || NOT_LONE_CHAR(cp, '0'));
         }
+        opterr = c;
         cp = get_local_var_value("OPTIND");
         optind = cp ? atoi(cp) : 0;
         optarg = NULL;