1#!/bin/sh
2# Exercise du's new ability to handle bind-mount-induced dir cycles.
3
4# Copyright (C) 2012-2023 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_ du
21require_root_
22
23cleanup_() { umount a/b; }
24
25mkdir -p a/b || framework_failure_
26mount --bind a a/b \
27  || skip_ "This test requires mount with a working --bind option."
28
29echo a > exp || framework_failure_
30
31du a > out 2> err || fail=1
32sed 's/^[0-9][0-9]*	//' out > k && mv k out
33
34compare /dev/null err || fail=1
35compare exp out || fail=1
36
37Exit $fail
38