Additional exit codes added + better shredding

sbin/grub2-sign

@@ -40,4 +40,12 @@ do
 done
 
 # Shredding passphrase
+
+echo "Shredding passphrase..."
+for ( i=0; $i<10; i++ )
+do
     pp=`cat /dev/urandom | tr -dc 'a-zA-Z0-9-!@#$%^&*()_+~' | fold -w ${#pp} | head -n 1`
+done
+
+echo "Done!"
+exit 0

sbin/grub2-unsign

@@ -19,3 +19,4 @@ do
 	rm $i
 done
 echo "GRUB2 unsigned. WARNING: If you want to deactivate GRUB2's signature feature, change the check_signatures variable in the headers file!"
+exit 0

sbin/grub2-verify

@@ -60,3 +60,6 @@ then
 else
     exit 0
 fi
+
+# WHAT?!
+exit 666