--- /dev/null
+#!/bin/bash
+set -ex
+set -o pipefail
+
+# tests for udev watch
+
+function check_validity() {
+ local f ID_OR_HANDLE
+
+ for f in /run/udev/watch/*; do
+ ID_OR_HANDLE=$(readlink $f)
+ test -L /run/udev/watch/${ID_OR_HANDLE}
+ test $(readlink /run/udev/watch/${ID_OR_HANDLE}) = $(basename $f)
+ done
+}
+
+function check() {
+ local i j
+
+ for ((i=0;i<2;i++)); do
+ systemctl restart systemd-udevd.service
+ udevadm control --ping
+ udevadm settle
+ sleep 1
+ check_validity
+
+ for ((j=0;j<2;j++)); do
+ udevadm trigger -w --action add --subsystem-match=block
+ udevadm settle
+ sleep 1
+ check_validity
+ done
+
+ for ((j=0;j<2;j++)); do
+ udevadm trigger -w --action change --subsystem-match=block
+ udevadm settle
+ sleep 1
+ check_validity
+ done
+ done
+}
+
+mkdir -p /run/udev/rules.d/
+
+cat >/run/udev/rules.d/00-debug.rules <<EOF
+SUBSYSTEM=="block", KERNEL=="sda*", OPTIONS="log_level=debug"
+EOF
+
+cat >/run/udev/rules.d/50-testsuite.rules <<EOF
+ACTION=="add", SUBSYSTEM=="block", KERNEL=="sda", OPTIONS:="watch"
+EOF
+
+check
+
+MAJOR=$(udevadm info /dev/sda | grep -e '^E: MAJOR=' | sed -e 's/^E: MAJOR=//')
+MINOR=$(udevadm info /dev/sda | grep -e '^E: MINOR=' | sed -e 's/^E: MINOR=//')
+test -L /run/udev/watch/b${MAJOR}:${MINOR}
+
+cat >/run/udev/rules.d/50-testsuite.rules <<EOF
+ACTION=="change", SUBSYSTEM=="block", KERNEL=="sda", OPTIONS:="nowatch"
+EOF
+
+check
+
+MAJOR=$(udevadm info /dev/sda | grep -e '^E: MAJOR=' | sed -e 's/^E: MAJOR=//')
+MINOR=$(udevadm info /dev/sda | grep -e '^E: MINOR=' | sed -e 's/^E: MINOR=//')
+test ! -e /run/udev/watch/b${MAJOR}:${MINOR}
+
+rm /run/udev/rules.d/00-debug.rules
+rm /run/udev/rules.d/50-testsuite.rules
+
+udevadm control --reload
+udevadm trigger -w --action add --subsystem-match=block
+
+exit 0