format: explicitly quote strings with variables

Signed-off-by: ZHANG Yuntian <[email protected]>

src/usr/lib/rsetup/cli/system.sh

@@ -251,8 +251,8 @@ set_gdm_autologin() {
     fi
 
     if [[ "$switch" == "ON" ]]; then
-        sed -i '/^# Rsetup/,/# Rsetup$/d' $config_dir/daemon.conf
-        cat << EOF | tee -a $config_dir/daemon.conf >/dev/null
+        sed -i '/^# Rsetup/,/# Rsetup$/d' "$config_dir/daemon.conf"
+        cat << EOF | tee -a "$config_dir/daemon.conf" >/dev/null
 # Rsetup
 # Auto generated by rsetup
 # DO NOT MODIFY!
@@ -262,7 +262,7 @@ AutomaticLoginEnable=true
 # Rsetup
 EOF
     else
-        sed -i '/^# Rsetup/,/# Rsetup$/d' $config_dir/daemon.conf
+        sed -i '/^# Rsetup/,/# Rsetup$/d' "$config_dir/daemon.conf"
     fi
 }
 
@@ -272,7 +272,7 @@ set_lightdm_autologin() {
 
     if [[ "$switch" == "ON" ]]; then
         mkdir -p "$config_dir"
-        cat << EOF | tee -a $config_dir/50-rsetup-autologin.conf >/dev/null
+        cat << EOF | tee -a "$config_dir/50-rsetup-autologin.conf" >/dev/null
 # Auto generated by rsetup
 # DO NOT MODIFY!
 [Seat:*]
@@ -289,7 +289,7 @@ get_autologin_status() {
 
     case "$service" in
     *getty@*.service)
-        if grep -q -e "--autologin" <(grep -v '^#' "/etc/systemd/system/$service.d/50-rsetup-autologin.conf")
+        if grep -q -e "--autologin" <(grep -v '^#' "/etc/systemd/system/${service}.d/50-rsetup-autologin.conf")
         then
             echo "ON"
         else