test/udev-test.pl: cleanup if skipping test

In Ubuntu CI, udev-test.pl is run from the debian/test/udev script,
in a test dir created for it; but udev-test.pl setup mounts a
dir, so if it doesn't cleanup/unmount before exiting, the test dir
autopkgtest created for it can't be removed, and autopkgtest
aborts the entire test suite, for example this output (from a
test run inside an armhf container):

autopkgtest [12:45:36]: test udev: [-----------------------
umount: test/tmpfs: no mount point specified.
mknod: test/tmpfs/dev/null: Operation not permitted
unable to create test/tmpfs/dev/null at ./udev-test.pl line 1611.
Failed to set up the environment, skipping the test at ./udev-test.pl line 1731.
autopkgtest [12:45:41]: test udev: -----------------------]
autopkgtest [12:45:44]: test udev:  - - - - - - - - - - results - - - - - - - - - -
udev                 FAIL non-zero exit status 77
rm: cannot remove '/tmp/autopkgtest.ocPFA6/autopkgtest_tmp/test/tmpfs': Device or resource busy
autopkgtest [12:46:22]: ERROR: "rm -rf /tmp/autopkgtest.ocPFA6/udev-artifacts /tmp/autopkgtest.ocPFA6/autopkgtest_tmp" failed with stderr "rm:

diff --git a/test/udev-test.pl b/test/udev-test.pl
index b37b2e9..85ec41b 100755 (executable)
--- a/test/udev-test.pl
+++ b/test/udev-test.pl
@@ -1713,6 +1713,12 @@ sub run_test {
 
 }
 
+sub cleanup {
+        system("rm", "-rf", "$udev_run");
+        system("umount", "$udev_tmpfs");
+        rmdir($udev_tmpfs);
+}
+
 # only run if we have root permissions
 # due to mknod restrictions
 if (!($<==0)) {
@@ -1729,11 +1735,13 @@ if ($? >> 8 == 0) {
 
 if (!udev_setup()) {
         warn "Failed to set up the environment, skipping the test";
+        cleanup();
         exit($EXIT_TEST_SKIP);
 }
 
 if (system($udev_bin, "check")) {
         warn "$udev_bin failed to set up the environment, skipping the test";
+        cleanup();
         exit($EXIT_TEST_SKIP);
 }
 
@@ -1776,10 +1784,7 @@ if ($list[0]) {
 
 print "$error errors occurred\n\n";
 
-# cleanup
-system("rm", "-rf", "$udev_run");
-system("umount", "$udev_tmpfs");
-rmdir($udev_tmpfs);
+cleanup();
 
 if ($error > 0) {
         exit(1);