1#!/bin/sh 2# Demonstrate that "truncate -s0 writable-but-owned-by-other" works. 3 4# Copyright (C) 2008-2023 Free Software Foundation, Inc. 5 6# This program is free software: you can redistribute it and/or modify 7# it under the terms of the GNU General Public License as published by 8# the Free Software Foundation, either version 3 of the License, or 9# (at your option) any later version. 10 11# This program is distributed in the hope that it will be useful, 12# but WITHOUT ANY WARRANTY; without even the implied warranty of 13# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14# GNU General Public License for more details. 15 16# You should have received a copy of the GNU General Public License 17# along with this program. If not, see <https://www.gnu.org/licenses/>. 18 19. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src 20print_ver_ truncate 21 22require_root_ 23 24# Create a file owned by root, and writable by $NON_ROOT_USERNAME. 25echo > root-owned || framework_failure_ 26chgrp +$NON_ROOT_GID . root-owned || framework_failure_ 27chmod g+w root-owned 28 29# Ensure that the current directory is searchable by $NON_ROOT_USERNAME. 30chmod g+x . 31 32chroot --skip-chdir --user=$NON_ROOT_USERNAME / env PATH="$PATH" \ 33 truncate -s0 root-owned || fail=1 34 35Exit $fail 36