#!/bin/sh
# Verify that `od -N N' reads no more than N bytes of input.

# Copyright (C) 2001, 2004, 2005, 2006 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
  od --version
fi

pwd=`pwd`
tmp=od-N.$$
trap 'status=$?; cd "$pwd" && rm -rf $tmp && exit $status' 0
trap '(exit $?); exit' 1 2 13 15

framework_failure=0
mkdir $tmp || framework_failure=1
cd $tmp || framework_failure=1
echo abcdefg > in || framework_failure=1

if test $framework_failure = 1; then
  echo 'failure in testing framework' 1>&2
  (exit 1); exit 1
fi

fail=0

(od -An -N3 -c; od -An -N3 -c) < in > out
cat <<EOF > exp || fail=1
   a   b   c
   d   e   f
EOF
cmp out exp || {
  fail=1
  diff out exp 2> /dev/null
  }

(exit $fail); exit $fail