1#!/bin/sh
2# Ensure that df dereferences symlinks to file system nodes
3
4# Copyright (C) 2013-2023 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. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
20print_ver_ df
21
22file_system=$(df --out=source '.' | tail -n1) ||
23  skip_ "cannot determine '.' file system"
24
25ln -s "$file_system" symlink || framework_failure_
26
27df --out=source,target "$file_system" > exp ||
28  skip_ "cannot get info for $file_system"
29df --out=source,target symlink > out || fail=1
30compare exp out || fail=1
31
32# Ensure we output the same values for device nodes and '.'
33# This was not the case in coreutils-8.22 on systems
34# where the device in the mount list was a symlink itself.
35# I.e., '.' => /dev/mapper/fedora-home -> /dev/dm-2
36# Restrict this test to systems with a 1:1 mapping between
37# source and target.  This excludes for example BTRFS sub-volumes.
38if test "$(df --output=source | grep -F "$file_system" | wc -l)" = 1; then
39  # Restrict to systems with a single file system root (and have findmnt(1))
40  if test "$(findmnt -nro FSROOT | uniq | wc -l)" =  1; then
41    df --out=source,target '.' > out || fail=1
42    compare exp out || fail=1
43  fi
44fi
45
46test "$fail" = 1 && dump_mount_list_
47
48Exit $fail
49