test: add test checking tmpfiles conf file precedence

diff --git a/test/units/testsuite-22.13.sh b/test/units/testsuite-22.13.sh
new file mode 100755 (executable)
index 0000000..33ef451
--- /dev/null
+++ b/test/units/testsuite-22.13.sh
@@ -0,0 +1,75 @@
+#!/bin/bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
+#
+# Tests for configuration directory and file precedences
+#
+set -eux
+
+rm -f  /{usr/lib,etc}/tmpfiles.d/{L,w}-*.conf
+rm -fr /tmp/precedence/{L,w}
+
+mkdir -p /{usr/lib,etc}/tmpfiles.d
+mkdir -p /tmp/precedence/{L,w}
+
+#
+# 'L'
+#
+ln -s /dev/null /tmp/precedence/L
+
+# Overwrite the existing symlink
+cat >/usr/lib/tmpfiles.d/L-z.conf<<EOF
+L+ /tmp/precedence/L - - - - /usr/lib/tmpfiles.d/L-z.conf
+EOF
+
+systemd-tmpfiles --create
+test "$(readlink /tmp/precedence/L)" = "/usr/lib/tmpfiles.d/L-z.conf"
+
+# Files in /etc should override those in /usr
+cat >/etc/tmpfiles.d/L-z.conf<<EOF
+L+ /tmp/precedence/L - - - - /etc/tmpfiles.d/L-z.conf
+EOF
+
+systemd-tmpfiles --create
+test "$(readlink /tmp/precedence/L)" = "/etc/tmpfiles.d/L-z.conf"
+
+# /usr/…/L-a.conf has higher prio than /etc/…/L-z.conf
+cat >/usr/lib/tmpfiles.d/L-a.conf<<EOF
+L+ /tmp/precedence/L - - - - /usr/lib/tmpfiles.d/L-a.conf
+EOF
+
+systemd-tmpfiles --create
+test "$(readlink /tmp/precedence/L)" = "/usr/lib/tmpfiles.d/L-a.conf"
+
+# Files in /etc should override those in /usr
+cat >/etc/tmpfiles.d/L-a.conf<<EOF
+L+ /tmp/precedence/L - - - - /etc/tmpfiles.d/L-a.conf
+EOF
+
+systemd-tmpfiles --create
+test "$(readlink /tmp/precedence/L)" = "/etc/tmpfiles.d/L-a.conf"
+
+#
+# 'w'
+#
+touch /tmp/precedence/w/f
+
+# Multiple configuration files specifying 'w+' for the same path is allowed.
+for i in a c; do
+    cat >/usr/lib/tmpfiles.d/w-$i.conf<<EOF
+w+ /tmp/precedence/w/f - - - - /usr/lib/tmpfiles.d/w-$i.conf\n
+EOF
+    cat >/etc/tmpfiles.d/w-$i.conf<<EOF
+w+ /tmp/precedence/w/f - - - - /etc/tmpfiles.d/w-$i.conf\n
+EOF
+done
+
+cat >/usr/lib/tmpfiles.d/w-b.conf<<EOF
+w+ /tmp/precedence/w/f - - - - /usr/lib/tmpfiles.d/w-b.conf\n
+EOF
+
+systemd-tmpfiles --create
+cmp /tmp/precedence/w/f <<EOF
+/etc/tmpfiles.d/w-a.conf
+/usr/lib/tmpfiles.d/w-b.conf
+/etc/tmpfiles.d/w-c.conf
+EOF