#!/bin/sh

: ${CP=cp}

suffix=.b
tmp=b1.$$
tmp_backup="$tmp$suffix"
rm -f $tmp

set -e
echo test > $tmp || exit 1

$CP --force --backup --version-control=simple --suffix=$suffix $tmp $tmp \
  || exit 1

test $? = 0 || exit 1

test -f $tmp || exit 1
test -f $tmp_backup || exit 1
cmp $tmp $tmp_backup > /dev/null

exit 0