#!/bin/sh
# Ensure dd treats `--' properly.
# Also ensure that iflags=noatime works.

tmp_in=dd-in.$$
tmp_out=dd-out.$$

if test "$VERBOSE" = yes; then
  set -x
  dd --version
fi

test_failure=0
echo data > $tmp_in || test_failure=1
if test $test_failure = 1; then
  echo 'failure in testing framework'
  exit 1
fi

dd if=$tmp_in of=$tmp_out > /dev/null 2>&1 || fail=1
cmp $tmp_in $tmp_out || fail=1

rm $tmp_out
dd -- if=$tmp_in of=$tmp_out > /dev/null 2>&1 || fail=1
cmp $tmp_in $tmp_out || fail=1

old_ls=`ls -u --full-time $tmp_in`
sleep 1
if dd iflags=noatime if=$tmp_in of=$tmp_out > /dev/null 2>&1; then
  new_ls=`ls -u --full-time $tmp_in`
  if test "x$old_ls" != "x$new_ls"; then
    echo "dd iflags=noatime updated atime; O_NOATIME bug in your kernel?" >&2
    fail=1
  fi
fi

rm -f $tmp_in $tmp_out

exit $fail