+# let's start slowly here...
+START=`date +%s`
+log "touching $MOUNT at `date`"
+touch $MOUNT || fail "can't touch $MOUNT" 2
+HOSTS=$MOUNT/hosts.$$
+TRUNCSIZE=123
+
+if [ $COUNT -gt 10 -o $COUNT -eq 0 ]; then
+ # this will cause the following cp to trigger bug #620096
+ log "create an empty file $HOSTS"
+ mcreate $HOSTS
+ log "copying /etc/hosts to $HOSTS"
+ cp /etc/hosts $HOSTS || fail "can't cp /etc/hosts to $HOSTS" 3
+ log "comparing /etc/hosts and $HOSTS"
+ diff -u /etc/hosts $HOSTS || fail "$HOSTS different" 4
+ log "renaming $HOSTS to $HOSTS.ren"
+ mv $HOSTS $HOSTS.ren || fail "can't rename $HOSTS to $HOSTS.ren" 5
+ log "copying /etc/hosts to $HOSTS again"
+ cp /etc/hosts $HOSTS || fail "can't cp /etc/hosts to $HOSTS again" 6
+ log "truncating $HOSTS"
+ > $HOSTS || fail "can't truncate $HOSTS" 8
+ log "removing $HOSTS"
+ rm $HOSTS || fail "can't remove $HOSTS" 9
+ cp /etc/hosts $HOSTS.2 || fail "can't cp /etc/hosts to $HOSTS.2" 7
+ log "truncating $HOSTS.2 to $TRUNCSIZE bytes"
+ truncate $HOSTS.2 $TRUNCSIZE
+fi
+
+DST=$MOUNT/runtest.$$
+# let's start slowly here...
+log "creating $DST"
+mkdir $DST || fail "can't mkdir $DST" 10
+
+# ok, that hopefully worked, so let's do a little more, with files that
+# haven't changed in the last day (hopefully they don't change during test)
+FILES=`find $RUNTESTS_SRC -type f -mtime +1 | head -n $COUNT`
+[ -z "$FILES" ] && fail "No unchanged files - is $RUNTESTS_SRC a new dir?"
+
+log "copying files from $RUNTESTS_SRC to $DST$RUNTESTS_SRC at `date`"
+tar cf - $FILES | tar xvf - -C $DST > /dev/null || fail "copying $RUNTESTS_SRC" 11