added ramtest script

still_below_one_page/ramtest.sh

@@ -0,0 +1,61 @@
+#!/bin/bash
+
+# This script is meant to find ram-errors via the
+# use of LUKS.
+# Usage: ./ramtest.sh <numberOfRuns>
+
+if
+        which pwgen >/dev/null && which dd >/dev/null && which cryptsetup >/dev/null 
+then 
+        echo "pwgen, dd and luks available. Continue."
+else
+        echo "pwgen, dd and/or luks not installed. Aborting."
+        exit 1
+fi
+
+if [[ -n $1 ]] && [[ $1 =~ ^[0-9]+$ ]]
+then 
+        COUNT=$1
+        echo "Number of runs is $COUNT"
+else
+        echo "Value not a number or no value given"
+        exit 1
+fi
+
+TMPDIR=$(mktemp -d)
+echo "Creating temp-dir $TMPDIR"
+
+PW=$(pwgen 64 -1)
+PWFILE="$TMPDIR/pw"
+
+echo $PW > $PWFILE
+
+echo "Creating temporary image with the size 1000MB"
+dd if=/dev/urandom of=$TMPDIR/ramtest.img bs=1M count=1000 2>/dev/null
+
+echo "Formatting image with luks"
+cryptsetup  luksFormat $TMPDIR/ramtest.img < $PWFILE
+> $TMPDIR/log
+for i in $(seq 1 $COUNT)
+        do
+                echo "Run number $i of $COUNT"
+            cryptsetup luksOpen --test-passphrase $TMPDIR/ramtest.img < $PWFILE 2>/dev/null
+            RES=$?
+            if [[ $RES -eq 0 ]] 
+            then
+                echo "0" >> $TMPDIR/log
+            else
+                echo "1" >> $TMPDIR/log
+            fi
+            unset RES
+        done
+
+echo -e "\n\
+Result: \n\
+Number of runs: $COUNT \n\
+Successful runs: $(grep ^0$ $TMPDIR/log | wc -l) \n\
+Unsuccessful runs: $(grep ^1$ $TMPDIR/log | wc -l) \n"
+
+echo "Removing temp-dir $TMPDIR"
+rm -Rf $TMPDIR
+exit 0