diff --git a/ssm b/ssm
index 91ba31c..03a385f 100755
--- a/ssm
+++ b/ssm
@@ -23,6 +23,8 @@ var() {
 						('==') mode=compare;;
 						('=~') mode=regex;;
 
+						('is') mode=\"is_\$2\";;
+
 						('u') mode=includes;;
 
 						(*) die 71 \"Syntax error in \$FUNCNAME!\";;
@@ -55,6 +57,12 @@ var() {
 
 						return 1
 					;;
+
+					(is_fs_object) [[ -e \"\$_var\" ]];;
+					(is_file) [[ -f \"\$_var\" ]];;
+					(is_dir|is_directory) [[ -d \"\$_var\" ]];;
+
+					(*) die 71 \"Syntax error in \$FUNCNAME!\";;
 				esac
 			}; readonly -f \"${varname}\"
 
@@ -195,7 +203,7 @@ timer() {
 }; readonly -f timer
 
 ## Is a service ready?
-is_ready() [[ -f "$service_ready_flag" ]]
+is_ready() { service_ready_flag is file; }
 readonly -f is_ready
 
 ## Wait for this service to get ready
@@ -301,8 +309,7 @@ read_systemd_service() {
 ## Start the service, write down the svc pid
 start() {
 	service_running && return 3
-
-	[[ -f "${service_command[0]}" ]] || return 9
+	service_command is file || return 9
 
 	if cgroups; then
 		if service_cgroup_exclusive; then
@@ -470,6 +477,7 @@ var service_pid \
 	service_stopped_flag \
 	service_cgroup_name \
 	service_cgroup_procs \
+	service_cgroup_path \
 	cgroup_home \
 	failed_deps \
 	svc_pidfile \
@@ -514,6 +522,7 @@ var service_stopped = 0
 var service_systemd = 0
 var service_nologs = 0
 var service_cgroup_empty = 1
+var service_cgroup_empty = 1
 
 # These depend on who we are
 if (( $UID )); then
@@ -543,7 +552,7 @@ for p in "/etc/ssm/init.d" "$XDG_CONFIG_HOME/ssm/init.d"; do
 done
 
 # Source the config
-if [[ -f "$cfg_file" ]]; then
+if cfg_file is file; then
 	source "$cfg_file" || die 37 "Failed to load config: $cfg_file"
 fi
 
@@ -641,6 +650,7 @@ service_ready_flag := "$rundir/$service_name.ready"
 service_enabled_flag := "$rundir/$service_name.enabled"
 service_stopped_flag := "$rundir/$service_name.stopped"
 service_cgroup_name := "$service_name"
+service_cgroup_path := "$cgroup_home/$service_name"
 
 # A shortcut for disabling logging
 if service_nologs; then
@@ -649,7 +659,7 @@ if service_nologs; then
 fi
 
 # Let's see if there's a PID
-if [[ -f "$service_pidfile" ]]; then
+if service_pidfile is file; then
 	read -r service_pid < "$service_pidfile"
 
 	# Let's see if it's running
@@ -659,20 +669,20 @@ if [[ -f "$service_pidfile" ]]; then
 fi
 
 # Maybe the service is enabled?
-if [[ -f "$service_enabled_flag" ]]; then
+if service_enabled_flag is file; then
 	# Yay, it is!
 	service_enabled = 1
 fi
 
 # Let's see if the service was deliberately stopped
-if [[ -f "$service_stopped_flag" ]]; then
+if service_stopped_flag is file; then
 	# Ooh, it was.
 	service_stopped = 1
 fi
 
 # Check cgroups, if enabled
 if cgroups; then
-	if [[ -d "$cgroup_home/$service_cgroup_name" ]]; then
+	if service_cgroup_path is dir; then
 		while read -r line; do
 			service_cgroup_procs += "$line"
 		done < "$cgroup_home/$service_cgroup_name/cgroup.procs"