1 files changed, 45 insertions, 0 deletions
diff --git a/tests/df/df-symlink.sh b/tests/df/df-symlink.sh
new file mode 100755
index 0000000..0ee47d0
--- /dev/null
+++ b/tests/df/df-symlink.sh
@@ -0,0 +1,45 @@
+#!/bin/sh
+# Ensure that df dereferences symlinks to file system nodes
+
+# Copyright (C) 2013-2022 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/>.
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ df
+
+file_system=$(df --out=source '.' | tail -n1) ||
+  skip_ "cannot determine '.' file system"
+
+ln -s "$file_system" symlink || framework_failure_
+
+df --out=source,target "$file_system" > exp ||
+  skip_ "cannot get info for $file_system"
+df --out=source,target symlink > out || fail=1
+compare exp out || fail=1
+
+# Ensure we output the same values for device nodes and '.'
+# This was not the case in coreutil-8.22 on systems
+# where the device in the mount list was a symlink itself.
+# I.e., '.' => /dev/mapper/fedora-home -> /dev/dm-2
+# Restrict this test to systems with a 1:1 mapping between
+# source and target.  This excludes for example BTRFS sub-volumes.
+if test "$(df --output=source | grep -F "$file_system" | wc -l)" = 1; then
+  df --out=source,target '.' > out || fail=1
+  compare exp out || fail=1
+fi
+
+test "$fail" = 1 && dump_mount_list_
+
+Exit $fail