Checking for ctrl-alt-del link

src/freedombone-utils-setup

@@ -424,6 +424,10 @@ function set_sticky_bits {
     done
 }
 
+function disable_ctrl_alt_del {
+    ln -sf /dev/null /etc/systemd/system/ctrl-alt-del.target
+}
+
 function lockdown_permissions {
     # All commands owned by root
     if [ -d /bin ]; then
@@ -541,6 +545,9 @@ function setup_utils {
     read_config_param "PROJECT_REPO"
     write_config_param "PROJECT_REPO" "$PROJECT_REPO"
 
+    function_check disable_ctrl_alt_del
+    disable_ctrl_alt_del
+
     function_check dummy_nologin_command
     dummy_nologin_command
 

tests/check-ctrl-alt-del.sh

 #!/bin/bash
 
 if [ -f /etc/systemd/system/ctrl-alt-del.target ];then
-        if ! ls -l /etc/systemd/system/ctrl-alt-del.target | grep "/dev/null";then
-                exit 1
-        fi
-else
+    ctrl_alt_del=$(ls -l /etc/systemd/system/ctrl-alt-del.target)
+    if [[ "$ctrl_alt_del" !=  *"/dev/null" ]]; then
         exit 1
+    fi
+else
+    exit 1
 fi