[SS?S] Split static_files/system into base and updates

base is considered static, i.e. only copied once when *installing* a
server, because they are config files the user/admin is expected to
edit, or because they have to match the specific Debian release the
installed server is based on, and thus should not - or only
selectively - be replaced by the satellite updater.

In other words, the system-updates module should be save to be copied
over a running satellite server on update via "install_files", while
files from system-base will only be updated selectively, if at all.

1 files changed, 205 insertions, 0 deletions

diff --git a/satellit_installer/static_files/system-base/usr/local/bin/netsetup b/satellit_installer/static_files/system-base/usr/local/bin/netsetup
new file mode 100755
index 0000000..a824739
--- /dev/null
+++ b/satellit_installer/static_files/system-base/usr/local/bin/netsetup
@@ -0,0 +1,205 @@
+#!/bin/bash
+
+if [ "$UID" != 0 ]; then
+	exec sudo "$0" "$@"
+	exit 1
+fi
+
+DATUM=$(date +%Y%m%d_%H%M%S)
+INTERFACES="/etc/network/interfaces"
+ETHALIAS=$( ifconfig -a | grep -oEm1 '^e\w+' )
+RESOLV="/etc/resolv.conf"
+HOSTNAMEFILE="/etc/hostname"
+SKRIPT=$(readlink -f "$0")
+ERR=0
+
+
+write_banner() {
+	echo
+	echo "Dieses Skript konfiguriert das Netzwerk-Interface."
+	echo
+	echo "Wenn Sie die Netzwerkkonfiguration ändern, sollten Sie anschließend"
+	echo "den Server rebooten."
+	echo
+}
+
+
+detect_config() {
+	if grep -q -E "^[[:space:]]*iface[[:space:]]+${ETHALIAS}[[:space:]]+inet[[:space:]]+dhcp" "$INTERFACES"; then
+		# dhcp detected, we presume
+		TYPE=dhcp-basierte
+		WUNSCH=statische
+		TOUCHE_TYPE=d
+		TOUCHE_DESIR=s
+	else
+		TYPE=statische
+		WUNSCH=dhcp-basierte
+		TOUCHE_TYPE=s
+		TOUCHE_DESIR=d
+	fi
+}
+
+ask_config() {
+	echo
+	echo "Es ist aktuell eine $TYPE IP-Adresse konfiguriert."
+	echo
+	echo "Wollen Sie eine $WUNSCH IP konfigurieren (${TOUCHE_DESIR}),"
+	echo "möchten Sie die $TYPE IP neu konfigurieren (${TOUCHE_TYPE}),"
+	echo "oder möchten Sie gar nichts tun (leere Eingabe)?"
+	echo
+	echo -n "Ihre Wahl? [${TOUCHE_DESIR}/${TOUCHE_TYPE}/nichts]: "
+	read CONFIG_ME
+	[ "$CONFIG_ME" == "" ] && exit 0
+}
+
+decide_action() {
+	case "$CONFIG_ME" in
+		${TOUCHE_DESIR}*)	backup_configs
+					if [ "$WUNSCH" == "statische" ]; then
+						enter_values_static
+						write_config_static
+					else
+						write_config_dyn
+					fi
+					;;
+		${TOUCHE_TYPE}*)	backup_configs
+					if [ "$TYPE" == "statische" ]; then
+						enter_values_static
+						write_config_static
+					else
+						write_config_dyn
+					fi
+					;;
+		*)			echo; echo
+					echo "Ihre eingegebene Option $CONFIG_ME wurde nicht erkannt - Neustart."
+					echo
+					sleep 1
+					exec "$SKRIPT"
+					;;
+	esac
+}
+
+backup_configs() {
+	if [ -f "$INTERFACES" ]; then
+		cp -p "$INTERFACES" "$INTERFACES.${DATUM}" || \
+			{ echo "Konnte Datei $INTERFACES nicht nach $INTERFACES.$DATUM sichern - Abbruch."; \
+			  exit 1 ; }
+		cp -p "$RESOLV" "$RESOLV.${DATUM}" || \
+			{ echo "Konnte Datei $RESOLV nicht nach $RESOLV.$DATUM sichern - Abbruch."; \
+			  exit 1 ; }
+	fi
+}
+
+restore_configs() {
+	cp -p "$INTERFACES.$DATUM" "$INTERFACES"
+	cp -p "$RESOLV.{DATUM}" "$RESOLV"
+}
+
+write_config_static() {
+	cat > "$INTERFACES" <<-HIER
+		# This file was written by the satellite auto installer.
+		# If any problems arise, copy $INTERFACES.${DATUM}.
+		# The loopback network interface
+		auto lo
+		iface lo inet loopback
+
+		# Primary network interface
+		auto $ETHALIAS
+		iface $ETHALIAS inet static
+		address $IPADRESS
+		gateway $GATEWAY
+		netmask $NETMASK
+	HIER
+
+	echo "# This file was written by the satellite server install script."	>  "$RESOLV"
+	echo "# If any problems arise, copy $RESOLV.${DATUM}."			>> "$RESOLV"
+	[ -n "$DOMAIN" ] && echo "domain $DOMAIN"				>> "$RESOLV"
+	[ -n "$SEARCH" ] && echo "search $SEARCH"				>> "$RESOLV"
+	[ -n "$PRIMARYDNS" ] && echo "nameserver $PRIMARYDNS"			>> "$RESOLV"
+	[ -n "$SECONDARYDNS" ] && echo "nameserver $SECONDARYDNS"		>> "$RESOLV"
+
+	echo "$HOSTNAME"							>  "$HOSTNAMEFILE"
+
+	[ -n "$DOMAIN" ] && DOMAIN=".${DOMAIN}"
+	sed "s/127.0.1.1.*/127.0.1.1\t${HOSTNAME}${DOMAIN}\t${HOSTNAME}/g" -i /etc/hosts --in-place=.alt
+
+}
+
+write_config_dyn() {
+	cat > "$INTERFACES" <<-HIER
+		# This file was written by the satellite auto installer.
+		# If any problems arise, copy $INTERFACES.${DATUM}.
+		# The loopback network interface
+		auto lo
+		iface lo inet loopback
+
+		# Primary network interface
+		auto $ETHALIAS
+		iface $ETHALIAS inet dhcp
+		# Leaving /etc/resolv alone; pump/dhclient/whatever will take care of that.
+	HIER
+}
+
+enter_values_static() {
+	OLDHOSTNAME=$(hostname)
+	unset ENTRY
+	while true; do
+		echo
+		echo -n "IP-Adresse: "
+		read IPADRESS
+		echo -n "Gateway:    "
+		read GATEWAY
+		echo -n "Netzmaske - leere Eingabe für 255.255.255.0: "
+		read NETMASK
+		[ -z "$NETMASK" ] && NETMASK=255.255.255.0
+		echo -n "Domain - leere Eingabe, wenn nicht erwünscht: "
+		read DOMAIN
+		echo -n "Search domain - leere Eingabe, wenn nicht erwünscht: "
+		read SEARCH
+		echo -n "Primärer Nameserver: "
+		read PRIMARYDNS
+		echo -n "Sekundärer Nameserver - Leere Eingabe, wenn nicht vorhanden: "
+		read SECONDARYDNS
+		echo -n "Hostname - leere Eingabe für bestehenden Hostname $OLDHOSTNAME: "
+		read HOSTNAME
+		[ "$HOSTNAME" == "" ] && HOSTNAME="$OLDHOSTNAME"
+		echo
+		echo "# IP-Adresse            : $IPADRESS"
+		echo "# Gateway               : $GATEWAY"
+		echo "# Netzmaske             : $NETMASK"
+		echo "# Domain                : $DOMAIN"
+		echo "# Search domain         : $SEARCH"
+		echo "# Primärer Nameserver   : $PRIMARYDNS"
+		echo "# Sekundärer Nameserver : $SECONDARYDNS"
+		echo "# Hostname              : $HOSTNAME"
+		echo
+		while true; do
+			echo -n "Sind diese Eingaben korrekt? [J/n]: "
+			read ENTRY
+			echo
+			[[ -z "$ENTRY" || "$ENTRY" == j* || "$ENTRY" == J* ]] && return
+			if [[ "$ENTRY" == n* || "$ENTRY" == N* ]]; then
+				echo "Neustart der Eingabe..."
+				echo
+				break
+			fi
+		done
+	done
+}
+
+last_words() {
+	echo
+	echo "Einträge geschrieben... beende Skript."
+	echo
+}
+
+detect_config
+write_banner
+ask_config
+
+decide_action	# do the stuff!
+
+last_words
+
+exit 0
+