Split main func (no os/proj dependency)

src/func/on_exit

@@ -0,0 +1,30 @@
+#!/bin/bash
+#remaster lib
+[ -d "$LIBDR"] || export LIBDIR="/usr/lib/remaster/"
+[ -d "$LIBDR"] || { echo "LIBDR not exist"; exit 1; }
+
+#on_exit [error_level]
+function on_exit() {
+	#send log and errorlevel[success/errorr xy]
+
+	if [ "$1" != "0" ]; then
+		log_mail_subject="$log_mail_subject [ERROR]"
+	else
+		log_mail_subject="$log_mail_subject [Success]"
+	fi
+
+	#Mail Body:
+	for mail_aim in `echo "$log_mail_aim" | tr "," " "`; do
+		{
+			echo "$log_mail_subject"
+			echo $'####################################################################################\n\n'
+			cat "$log_file"
+		} | sendemail -s "$log_mail_smtp" -f "$log_mail_source" -t "$mail_aim" -u "$log_mail_subject" -o tls=no
+	done
+
+	[ "$1" != "0" ] && {
+		chroot_umount$distro "$chroot_path" 2> /dev/null
+		workspace_erase "$iso_extr_dir/" "$chroot_path/" 2> /dev/null
+	}
+	exit $1
+}