docker-ce: Made some shellcheck recommendations

Signed-off-by: Gerard Ryan <G.M0N3Y.2503@gmail.com>

utils/docker-ce/files/dockerd.init

@@ -9,11 +9,11 @@ extra_command "ucidel" "Delete default bridge configuration from network and fir
 DOCKERD_CONF="/tmp/dockerd/daemon.json"
 
 uci_quiet() {
-	uci -q ${@} >/dev/null
+	uci -q "${@}" >/dev/null
 }
 
 json_add_array_string() {
-	json_add_string "" "$1"
+	json_add_string "" "${1}"
 }
 
 boot() {
@@ -22,14 +22,14 @@ boot() {
 }
 
 uciupdate() {
-	local net="$1"
+	local net="${1}"
 
 	uci -q get network.docker >/dev/null || {
 		logger -t "dockerd-init" -p warn "No network uci config section for docker default bridge (docker0) found"
 		return
 	}
 
-	[ -z "$net" ] && {
+	[ -z "${net}" ] && {
 		logger -t "dockerd-init" -p notice "Removing network uci config options for docker default bridge (docker0)"
 		uci_quiet delete network.docker.netmask
 		uci_quiet delete network.docker.ipaddr
@@ -37,10 +37,10 @@ uciupdate() {
 		return
 	}
 
-	eval "$(ipcalc.sh "$net")"
-	logger -t "dockerd-init" -p notice "Updating network uci config option \"$net\" for docker default bridge (docker0)"
-	uci_quiet set network.docker.netmask="$NETMASK"
-	uci_quiet set network.docker.ipaddr="$IP"
+	eval "$(ipcalc.sh "${net}")"
+	logger -t "dockerd-init" -p notice "Updating network uci config option \"${net}\" for docker default bridge (docker0)"
+	uci_quiet set network.docker.netmask="${NETMASK}"
+	uci_quiet set network.docker.ipaddr="${IP}"
 	uci_quiet commit network
 }
 
@@ -112,7 +112,7 @@ ucidel() {
 process_config() {
 	local alt_config_file data_root log_level bip
 
-	rm -f "$DOCKERD_CONF"
+	rm -f "${DOCKERD_CONF}"
 
 	[ -f /etc/config/dockerd ] || {
 		# Use the daemon default configuration
@@ -123,8 +123,8 @@ process_config() {
 	config_load 'dockerd'
 
 	config_get alt_config_file globals alt_config_file
-	[ -n "$alt_config_file" ] && [ -f "$alt_config_file" ] && {
-		ln -s "$alt_config_file" "$DOCKERD_CONF"
+	[ -n "${alt_config_file}" ] && [ -f "${alt_config_file}" ] && {
+		ln -s "${alt_config_file}" "${DOCKERD_CONF}"
 		return 0
 	}
 
@@ -134,9 +134,9 @@ process_config() {
 
 	. /usr/share/libubox/jshn.sh
 	json_init
-	json_add_string "data-root" "$data_root"
-	json_add_string "log-level" "$log_level"
-	[ -z "$bip" ] || json_add_string "bip" "$bip"
+	json_add_string "data-root" "${data_root}"
+	json_add_string "log-level" "${log_level}"
+	[ -z "${bip}" ] || json_add_string "bip" "${bip}"
 	json_add_array "registry-mirrors"
 	config_list_foreach globals registry_mirrors json_add_array_string
 	json_close_array
@@ -145,9 +145,9 @@ process_config() {
 	json_close_array
 
 	mkdir -p /tmp/dockerd
-	json_dump > "$DOCKERD_CONF"
+	json_dump > "${DOCKERD_CONF}"
 
-	uciupdate "$bip"
+	uciupdate "${bip}"
 }
 
 start_service() {
@@ -157,10 +157,10 @@ start_service() {
 
 	procd_open_instance
 	procd_set_param stderr 1
-	if [ -z "$DOCKERD_CONF" ]; then
+	if [ -z "${DOCKERD_CONF}" ]; then
 		procd_set_param command /usr/bin/dockerd
 	else
-		procd_set_param command /usr/bin/dockerd --config-file="$DOCKERD_CONF"
+		procd_set_param command /usr/bin/dockerd --config-file="${DOCKERD_CONF}"
 	fi
 	procd_set_param limits nofile="${nofile} ${nofile}"
 	procd_close_instance