add linux installer script - autogenerates to work with server

static/install-linux

@@ -0,0 +1,108 @@
+#!/bin/bash
+
+# Script to initialise/de-initialise hosts file for
+# ActionMC legacy skin servers.
+
+# Virtue, 2020
+
+# Script-wide configuration
+
+# Actual code beyond this point.
+
+
+# Initialise functions.
+print_info () {
+	printf "\nThis script adds a line to your hosts file which\n"
+	printf "allows any legacy Minecraft client to\n"
+	printf "communicate with our custom skin servers.\n\n"
+	printf "This change intercepts connections to the website\n"
+	printf "s3.amazonaws.com and redirects them to our own\n"
+	printf "server.\n\n"
+	printf "If you use your machine for anything other than\n"
+	printf "playing Minecraft, it is best to only turn on\n"
+	printf "this modification when playing legacy Minecraft\n"
+	printf "or Action MC. A lot of the internet relies on\n"
+	printf "Amazon's S3 services, and we cannot provide all of\n"
+	printf "their services.\n\n"
+	printf "You will need superuser privileges in order to run\n"
+	printf "this script, so ensure that you are running this\n"
+	printf "script as a superuser.\n"
+}
+
+print_end () {
+	printf "\nThe script is finished its task. Please check that\n"
+	printf "the server IP resolves properly by starting a web\n"
+	printf "browser and navigating to http://s3.amazonaws.com/statistics.\n\n"
+	printf "If this works, you are good to go! Launch Minecraft\n"
+	printf "and see everyone's skins!\n"
+}
+
+init_skins () {
+	printf "\n[+] Adding line to /etc/hosts for s3.amazonaws.com...\n"
+	printf "\n81.151.215.246	s3.amazonaws.com" >> /etc/hosts
+	printf "[+] Added line to /etc/hosts successfully.\n\n"
+}
+
+remove_skins () {
+	printf "\n"
+	echo [-] Removing line from /etc/hosts for s3.amazonaws.com...
+	grep -v "s3.amazonaws.com" /etc/hosts > tmphosts
+	rm /etc/hosts
+	mv tmphosts /etc/hosts
+	echo [-] Removing temporary files...
+	printf "\n"
+	echo [-] Removed line from /etc/hosts successfully.
+	printf "\n"
+}
+
+obtain_sudo () {
+	if [ "${UID}" -eq 0 ]
+	then
+		echo "Running as root."
+	else
+		echo "Not running as root. Run this script as root."
+		exit 1
+	fi
+}
+
+# Program title.
+printf "ActionMC Skin Server Manager\n"
+echo ----------------------------
+
+# Print information.
+print_info
+
+echo ----------------------------
+printf "\n"
+#printf "Please grant this script access to modify the hosts file.\n"
+
+# Obtain sudo before proceeding.
+obtain_sudo
+
+# If we are this far already, we have root/sudo.
+printf "Privilege obtained.\n\n----------------------------\n"
+
+case `grep -R "s3.amazonaws.com" /etc/hosts >/dev/null; echo $?` in
+	0)
+		# Found S3 in the hosts.
+		printf "\n"
+		echo [!] Found reference to Amazon S3 in hosts file.
+		remove_skins
+		;;
+	1)
+		# Not found
+		printf "\n"
+		echo [!] Found no reference to Amazon S3 in hosts file.
+		init_skins
+		;;
+	*)
+		# Error.
+		printf "\n"
+		echo Exception thrown trying to find S3 in the hosts file.
+		;;
+esac
+
+echo -----------------------------
+print_end
+
+# EOF