Merge pull request #255 from mfgbhatti/backgrounds

Backgrounds checks

scripts/startup.sh

@@ -22,7 +22,46 @@ set_option() {
     fi
     echo "${1}=${2}" >>$CONFIG_FILE # add option
 }
-# @description Renders a text based list of options that can be selected by the
+
+root_check() {
+    if [[ "$(id -u)" != "0" ]]; then
+        echo -ne "ERROR! This script must be run under the 'root' user!\n"
+        exit 0
+    fi
+}
+
+docker_check() {
+    if awk -F/ '$2 == "docker"' /proc/self/cgroup | read -r; then
+        echo -ne "ERROR! Docker container is not supported (at the moment)\n"
+        exit 0
+    elif [[ -f /.dockerenv ]]; then
+        echo -ne "ERROR! Docker container is not supported (at the moment)\n"
+        exit 0
+    fi
+}
+
+arch_check() {
+    if [[ ! -e /etc/arch-release ]]; then
+        echo -ne "ERROR! This script must be run in Arch Linux!\n"
+        exit 0
+    fi
+}
+
+pacman_check() {
+    if [[ -f /var/lib/pacman/db.lck ]]; then
+        echo "ERROR! Pacman is blocked."
+        echo -ne "If not running remove /var/lib/pacman/db.lck.\n"
+        exit 0
+    fi
+}
+
+background_checks() {
+    root_check
+    arch_check
+    pacman_check
+    docker_check
+}
+# Renders a text based list of options that can be selected by the
 # user using up, down and enter keys and returns the chosen option.
 #
 #   Arguments   : list of options, maximum of 256
@@ -317,6 +356,7 @@ installtype () {
 # language (){}
 
 # Starting functions
+background_checks
 clear
 logo
 userinfo