coreutils/tests/dd/misc

#!/bin/sh
# Ensure dd treats `--' properly.
# Also test some flag values.

tmp_in=dd-in.$$
tmp_in2=dd-in2.$$
tmp_sym=dd-sym.$$
tmp_out=dd-out.$$

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

test_failure=0
echo data > $tmp_in || test_failure=1
ln $tmp_in $tmp_in2 || test_failure=1
ln -s $tmp_in $tmp_sym || test_failure=1
if test $test_failure = 1; then
  echo 'failure in testing framework'
  exit 1
fi

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

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

if dd oflag=append if=$tmp_in of=$tmp_out 2> /dev/null; then
  cmp $tmp_in $tmp_out || fail=1
fi

if dd iflag=nofollow if=$tmp_in count=0 2> /dev/null; then
  dd iflag=nofollow if=$tmp_sym count=0 2> /dev/null && fail=1
fi

if dd iflag=directory if=. count=0 2> /dev/null; then
  dd iflag=directory count=0 <. 2> /dev/null || fail=1
  dd iflag=directory count=0 <$tmp_in 2> /dev/null && fail=1
fi

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

if dd oflag=nolinks if=$tmp_in of=$tmp_out 2> /dev/null; then
  dd iflag=nolinks if=$tmp_in > /dev/null 2>&1 && fail=1
  dd iflag=nolinks < $tmp_in > /dev/null 2>&1 && fail=1
  dd oflag=nolinks < $tmp_in > $tmp_out 2>&1 || fail=1
fi

rm -f $tmp_in $tmp_in2 $tmp_sym $tmp_out

exit $fail