test: add a script to check for leftover litest rules

An aborted test run can sometimes leave udev rules as detritus. Test for that
so we don't get test case failures triggered by those rules.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

meson.build

@@ -564,6 +564,9 @@ if get_option('tests')
 		config_h.set_quoted('ADDR2LINE', addr2line.path())
 	endif
 
+	leftover_rules = find_program('test/check-leftover-udev-rules.sh')
+	test('leftover-rules', leftover_rules, is_parallel : false)
+
 	dep_libunwind = dependency('libunwind', required : false)
 	config_h.set10('HAVE_LIBUNWIND', dep_libunwind.found())
 

test/check-leftover-udev-rules.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+ls /run/udev/rules.d/*litest*.rules 2>/dev/null
+if [[ $? -eq 0 ]]; then
+	exit 1
+fi
+
+ls /etc/udev/hwdb.d/*litest*REMOVEME*.hwdb 2>/dev/null
+if [[ $? -eq 0 ]]; then
+	exit 1
+fi

test/valgrind.suppressions

@@ -52,3 +52,15 @@
    fun:ioctl
    fun:libevdev_grab
 }
+{
+   bash:execute_command
+   Memcheck:Cond
+   ...
+   fun:execute_command
+}
+{
+   bash:execute_command
+   Memcheck:Leak
+   ...
+   fun:execute_command
+}