#!/bin/sh
# test dd reblocking vs. bs=

# Copyright (C) 2008 Free Software Foundation, Inc.

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

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

. $srcdir/lang-default
. $srcdir/test-lib.sh

cat <<\EOF > exp-reblock || framework_failure
0+2 records in
1+1 records out
4 bytes (4 B) copied
EOF

cat <<\EOF > exp-no-reblock || framework_failure
0+2 records in
0+2 records out
4 bytes (4 B) copied
EOF

fail=0

# ensure that dd reblocks when bs= is not specified
(echo x; sleep .1; echo y) | dd ibs=3 obs=3 > out 2> err || fail=1
sed 's/,.*//' err > k && mv k err
compare err exp-reblock || fail=1

# Demonstrate that bs=N supersedes even following ibs= and obs= settings.
(echo x; sleep .1; echo y) | dd bs=3 ibs=1 obs=1 > out 2> err || fail=1
sed 's/,.*//' err > k && mv k err
compare err exp-no-reblock || fail=1

Exit $fail