setup-sshd: fix backwards compat with -c

Do not enter interactive mode if -c was set, for backwards compatiblity.

setup-sshd.in

@@ -57,7 +57,7 @@ shift $(( $OPTIND - 1 ))
 
 case "$1" in
 	openssh|dropbear|none) sshdchoice="$1" ;;
-	"") interactive=1;;
+	"") [ -z "$sshdchoice" ] && interactive=1;;
 	*) usage "1" >&2;;
 esac
 

tests/setup_sshd_test

@@ -6,6 +6,7 @@ init_tests \
 	setup_sshd_empty \
 	setup_sshd_dropbear \
 	setup_sshd_openssh \
+	setup_sshd_openssh_c_compat \
 	setup_sshd_interactive_openssh_nologin \
 	setup_sshd_interactive_openssh_prohibitpass \
 	setup_sshd_interactive_openssh_nokey \
@@ -45,6 +46,17 @@ setup_sshd_openssh_body() {
 	grep 'ssh-id FOOBAR' root/.ssh/authorized_keys || atf_fail "failed to wget ssh key"
 }
 
+setup_sshd_openssh_c_compat_body() {
+	init_env
+	atf_check -s exit:0 \
+		-e empty \
+		-o match:"^apk add .* openssh" \
+		-o match:"service sshd added" \
+		-o match:"Starting sshd" \
+		-o not-match:"Allow root ssh" \
+		setup-sshd -c openssh
+}
+
 setup_sshd_interactive_openssh_nologin_body() {
 	init_env
 	mkdir -p etc/ssh