From c4d125f22d34dfa589509abd0103404a7ab2a222 Mon Sep 17 00:00:00 2001
From: Nicholas Yip <nicholasyip@obceit.cc>
Date: Thu, 3 Dec 2020 01:55:49 +0900
Subject: [PATCH] feat(option): Restrict the timeout input to non-negative
 integers

---
 wait-for | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/wait-for b/wait-for
index e28e54c..a685a69 100755
--- a/wait-for
+++ b/wait-for
@@ -55,7 +55,6 @@ do
     ;;
     -t)
     TIMEOUT="$2"
-    if [ "$TIMEOUT" = "" ]; then break; fi
     shift 2
     ;;
     --timeout=*)
@@ -76,6 +75,11 @@ do
   esac
 done
 
+if ! [ "$TIMEOUT" -ge 0 ] 2>/dev/null; then
+  echoerr "Error: invalid timeout '$TIMEOUT'"
+  usage 3
+fi
+
 if [ "$HOST" = "" -o "$PORT" = "" ]; then
   echoerr "Error: you need to provide a host and port to test."
   usage 2