Check if Avahi services directory exists and is writable

openssh-avahi-helper.sh

@@ -12,6 +12,7 @@ load_vars(){
 	SSHD_CONFIG="${SSHD_CONFIG:-/etc/ssh/sshd_config}"
 	AVAHI_TEMPLATE="${AVAHI_TEMPLATE:-/etc/ssh/openssh_avahi.service}"
 	AVAHI_SERVICE="${AVAHI_SERVICE:-/etc/avahi/services/openssh.service}"
+	AVAHI_DIRECTORY="$(dirname "$AVAHI_SERVICE")"
 	LOCK_FILE="${LOCK_FILE:-/run/openssh-avahi-helper.marker}"
 	for i in "$SSHD_CONFIG" "$AVAHI_TEMPLATE"
 	do
@@ -19,6 +20,14 @@ load_vars(){
 			echo "Config file ${i} cannot be read!"
 			return 1
 		fi
+		if [ ! -d "$AVAHI_DIRECTORY" ]; then
+			echo "Avahi is probably not installed, exiting."
+			exit 0
+		fi
+		if [ ! -w "$AVAHI_DIRECTORY" ]; then
+			echo "Error: Avahi service directory is not writable!"
+			return 1
+		fi
 	done
 }
 

openssh.spec

@@ -20,7 +20,7 @@
 Summary:	OpenSSH free Secure Shell (SSH) implementation
 Name:		openssh
 Version:	7.9p1
-Release:	9
+Release:	10
 License:	BSD
 Group:		Networking/Remote access
 Url:		http://www.openssh.com/