-echo "touching $OSCMT"
-touch $OSCMT || fail "can't touch $OSCMT" 2
-HOSTS=$OSCMT/hosts.$$
-
-# this will cause the following cp to trigger bug #620096
-#echo "create an empty file $HOSTS"
-#$MCREATE $HOSTS
-
-echo "copying /etc/hosts to $HOSTS"
-cp /etc/hosts $HOSTS || fail "can't cp /etc/hosts to $HOSTS" 3
-echo "comparing /etc/hosts and $HOSTS"
-diff -u /etc/hosts $HOSTS || fail "$HOSTS different" 4
-echo "renaming $HOSTS to $HOSTS.ren"
-mv $HOSTS $HOSTS.ren || fail "can't rename $HOSTS to $HOSTS.ren" 5
-echo "copying /etc/hosts to $HOSTS again"
-cp /etc/hosts $HOSTS || fail "can't cp /etc/hosts to $HOSTS again" 6
-echo "truncating $HOSTS"
-> $HOSTS || fail "can't truncate $HOSTS" 8
-echo "removing $HOSTS"
-rm $HOSTS || fail "can't remove $HOSTS" 9
-
-DST=$OSCMT/runtest.$$
-# let's start slowly here...
-echo "creating $DST"
-mkdir $DST || fail "can't mkdir $DST" 10
-
-# ok, that hopefully worked, so let's do a little more
-FILES=`find $SRC -type f | head -$COUNT`
-echo "copying files from $SRC to $DST$SRC"
-tar cf - $FILES | tar xvf - -C $DST || fail "copying $SRC" 11
-
-echo "comparing newly copied files"
-for f in $FILES; do
- [ $V ] && echo "verifying $DST/$f"
- diff -q $f $DST/$f || ERROR=11
+log "creating $DST"
+test_mkdir -p $DST || error "can't mkdir $DST" 12
+
+# ok, that hopefully worked, so let's do a little more, with files that
+# haven't changed in the last day (hopefully they don't change during test)
+FILES=$TMP/runtests.files
+# use "NUL" instead of newline as filename terminator, bug 19702
+find $RUNTESTS_SRC -type f -mtime +1 | head -n $COUNT | tr '\n' '\0' > $FILES
+[ -s "$FILES" ] ||
+ error "$RUNTESTS_SRC contains only files modifed less than 2 days ago"
+COUNT=$(xargs -0 -n 1 echo < $FILES | wc -l)
+
+log "copying $COUNT files from $RUNTESTS_SRC to $DST$RUNTESTS_SRC at $(date)"
+tar cf - --null --files-from $FILES | tar xvf - -C $DST > /dev/null ||
+ error "copying $RUNTESTS_SRC" 17
+
+log "comparing $COUNT newly copied files at $(date)"
+
+cat $FILES | tr "\0" "\n" | ( rc=0; while read f; do
+ [ $V ] && log "verifying $DST/$f"
+ diff -q "$f" "$DST/$f" || rc=18