#!/bin/sh # ensure that cp does not write through a just-copied symlink # Copyright (C) 2007-2018 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 . . "${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