From b208ec1fc1fb4452647560346cc1ea71179c698a Mon Sep 17 00:00:00 2001
From: Patrick McDermott <patrick.mcdermott@libiquity.com>
Date: Sun, 14 Apr 2019 13:48:30 -0400
Subject: main(): Return on invalid options

---
diff --git a/src/main.sh b/src/main.sh
index f50cad4..549e45e 100644
--- a/src/main.sh
+++ b/src/main.sh
@@ -47,9 +47,14 @@ _get_options()
 
 	unset OPTARG
 	while getopts "${OPTSTRING}" opt; do
-		if [ "x${opt}" != 'x?' ]; then
-			eval "opt_${opt}=\"\${OPTARG:-true}\""
-		fi
+		case "${opt}" in
+			'?')
+				return 1
+				;;
+			*)
+				eval "opt_${opt}=\"\${OPTARG:-true}\""
+				;;
+		esac
 		unset OPTARG
 	done
 
@@ -70,7 +75,10 @@ main()
 
 	load_locale || return 1
 
-	_get_options "${@}"
+	if ! _get_options "${@}"; then
+		cmd_help_main 1>&2
+		return 1
+	fi
 	shift $((${OPTIND} - 1))
 
 	base_dir="${opt_b:-.}"
--
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