added apache2_dav hook script

hook-scripts/apache2_dav

@@ -0,0 +1,85 @@
+#!/bin/sh
+#
+# Manage apache webdav
+#	- after mounting: add the new webdav share
+#	- before umounting: disable and remove the webdav share
+#
+# This script assumes, that you added the apache2_dav.conf file
+# (/usr/share/doc/cryptobox/conf-examples/) to your apache configuration directory
+# (e.g. /etc/apache2/conf.d)
+#
+#
+# Params:	$event $volume_name $volume_type $mount_dir
+#
+#	event:	premount | postmount | preumount | postumount
+#	device:	name of the device
+#	volume_name:	name of the volume
+#	volume_type:	plain | luks
+#	mount_dir:	mount directory
+#
+
+set -eu
+
+APACHE_SCRIPT=/etc/init.d/apache2
+APACHE_CONF_DIR=/var/cache/cryptobox/apache2_dav.conf.d
+TEMPLATE_CONF_FILE=/etc/cryptobox/apache2_dav-share.conf-template
+MAIN_APACHE_CONF_FILE=/etc/cryptobox/apache-include.conf
+
+# exit if apache2 is not installed
+test -e "$APACHE_SCRIPT" || exit 0
+
+# create include-file directory
+mkdir -p "$APACHE_CONF_DIR"
+
+# check event argument
+if test "$#" -eq 0
+  then	echo "Syntax: $(basename $0) EVENT [EVENT_INFORMATION]" >&2
+	exit 1
+ fi
+
+event=$1
+
+
+# ------------=-=-=- some functions -=-=-=-----------------
+
+update_include_conf_file()
+{
+	(	echo "# this file was automatically generated by the CryptoBox"
+		echo "# DO NOT EDIT - all changes will get lost!"
+		find "$APACHE_CONF_DIR" -type f -name "*.conf" | while read fname
+		  do	echo "include = $fname"
+		 done ) >"$MAIN_APACHE_CONF_FILE"
+}
+
+send_reload_command()
+{
+	# reload config files
+	"$APACHE_SCRIPT" graceful
+}
+
+# -----------------=-=-=- main -=-=-=----------------------
+
+case "$event" in
+	premount|postumount )
+		;;
+	postmount )
+		vol_name=$3
+		mount_dir=$5
+		sed "s#_SHARE_DIR_#$mount_dir#g; s#_VOLUME_NAME_#$vol_name#g" "$TEMPLATE_CONF_FILE" >"$APACHE_CONF_DIR/${vol_name}.conf"
+		update_include_conf_file
+		send_reload_command
+		;;
+	preumount )
+		vol_name=$3
+		rm "$APACHE_CONF_DIR/${vol_name}.conf" || true
+		update_include_conf_file
+		send_reload_command
+		;;
+	* )
+		# ignore all events that we do not support
+		exit 0
+		;;
+  esac
+
+exit 0
+