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#!/bin/sh
# ensure that cp does not write through a just-copied symlink
# Copyright (C) 2007-2020 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 <https://www.gnu.org/licenses/>.
. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
print_ver_ cp
mkdir a b c || framework_failure_
ln -s ../t a/1 || framework_failure_
echo payload > b/1 || framework_failure_
echo "cp: will not copy 'b/1' through just-created symlink 'c/1'" \
> exp || framework_failure_
# Check both cases: a dangling symlink, and one pointing to a writable file.
for i in dangling-dest existing-dest; do
test $i = existing-dest && echo i > t
test $i = dangling-dest && rm -f t
cp -dR a/1 b/1 c 2> out && fail=1
compare exp out || fail=1
# When the destination is a dangling symlink,
# ensure that cp does not create it.
test $i = dangling-dest \
&& test -f t && fail=1
# When the destination symlink points to a writable file,
# ensure that cp does not change it.
test $i = existing-dest \
&& case $(cat t) in i);; *) fail=1;; esac
done
Exit $fail
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