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#!/bin/sh
# Ensure that cp works as documented, when the destination is a dangling symlink
# Copyright (C) 2007-2022 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
ln -s no-such dangle || framework_failure_
echo hi > f || framework_failure_
echo hi > exp || framework_failure_
echo "cp: not writing through dangling symlink 'dangle'" \
> exp-err || framework_failure_
# Starting with 6.9.90, this usage fails, by default:
for opt in '' '-f'; do
returns_ 1 cp $opt f dangle > err 2>&1 || fail=1
compare exp-err err || fail=1
test -f no-such && fail=1
done
# But you can set POSIXLY_CORRECT to get the historical behavior.
env POSIXLY_CORRECT=1 cp f dangle > out 2>&1 || fail=1
cat no-such >> out || fail=1
compare exp out || fail=1
# Starting with 8.30 we treat ELOOP as existing and so
# remove the symlink
ln -s loop loop || framework_failure_
cp -f f loop > err 2>&1 || fail=1
compare /dev/null err || fail=1
compare exp loop || fail=1
test -f loop || fail=1
Exit $fail
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