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resolv: Add preinit tests to resolv/tst-resolv-res_init-skeleton.c
This commit is contained in:
Florian Weimer
parent
073ec86e5e
commit
4e45d83c92
@ -1,3 +1,12 @@
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2017-07-03 Florian Weimer <fweimer@redhat.com>
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* resolv/tst-resolv-res_init-skeleton.c
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(special_tests_count, special_test_call_res_init)
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(special_test_callback, special_test_thread_func)
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(run_special_test_on_thread, special_test): Define.
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(do_test): call special_test.
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(test_init_names): Fix typo.
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2017-07-03 Rajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com>
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* sysdeps/powerpc/powerpc64/power8/strlen.S: Remove unreachable code.
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@ -260,7 +260,7 @@ enum test_init
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static const char *const test_init_names[] =
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{
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[test_init] = "res_init",
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[test_ninit] = "res_init",
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[test_ninit] = "res_ninit",
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[test_mkquery] = "res_mkquery",
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[test_gethostbyname] = "gethostbyname",
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[test_getaddrinfo] = "getaddrinfo",
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@ -540,6 +540,192 @@ test_file_contents (const struct test_case *t)
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}
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}
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/* Special tests which do not follow the general pattern. */
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enum { special_tests_count = 7 };
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#if TEST_THREAD
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/* Called from test number 3-6 to trigger reloading of the
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configuration. */
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static void *
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special_test_call_res_init (void *closure)
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{
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TEST_VERIFY (res_init () == 0);
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return NULL;
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}
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#endif
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/* Implementation of special tests. */
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static void
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special_test_callback (void *closure)
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{
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unsigned int *test_indexp = closure;
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unsigned test_index = *test_indexp;
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TEST_VERIFY (test_index < special_tests_count);
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if (test_verbose > 0)
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printf ("info: special test %u\n", test_index);
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xchroot (path_chroot);
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switch (test_index)
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{
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case 0:
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case 1:
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/* Second res_init with missing or empty file preserves
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flags. */
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if (test_index == 1)
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TEST_VERIFY (unlink (_PATH_RESCONF) == 0);
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_res.options = RES_USE_EDNS0;
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TEST_VERIFY (res_init () == 0);
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/* First res_init clears flag. */
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TEST_VERIFY (!(_res.options & RES_USE_EDNS0));
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_res.options |= RES_USE_EDNS0;
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TEST_VERIFY (res_init () == 0);
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/* Second res_init preserves flag. */
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TEST_VERIFY (_res.options & RES_USE_EDNS0);
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if (test_index == 1)
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/* Restore empty file. */
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support_write_file_string (_PATH_RESCONF, "");
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break;
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case 2:
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/* Second res_init is cumulative. */
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support_write_file_string (_PATH_RESCONF,
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"options rotate\n"
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"nameserver 192.0.2.1\n");
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_res.options = RES_USE_EDNS0;
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TEST_VERIFY (res_init () == 0);
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/* First res_init clears flag. */
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TEST_VERIFY (!(_res.options & RES_USE_EDNS0));
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/* And sets RES_ROTATE. */
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TEST_VERIFY (_res.options & RES_ROTATE);
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_res.options |= RES_USE_EDNS0;
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TEST_VERIFY (res_init () == 0);
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/* Second res_init preserves flag. */
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TEST_VERIFY (_res.options & RES_USE_EDNS0);
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TEST_VERIFY (_res.options & RES_ROTATE);
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/* Reloading the configuration does not clear the explicitly set
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flag. */
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support_write_file_string (_PATH_RESCONF,
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"nameserver 192.0.2.1\n"
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"nameserver 192.0.2.2\n");
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TEST_VERIFY (res_init () == 0);
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TEST_VERIFY (_res.nscount == 2);
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TEST_VERIFY (_res.options & RES_USE_EDNS0);
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/* Whether RES_ROTATE (originally in resolv.conf, now removed)
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should be preserved is subject to debate. See bug 21701. */
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/* TEST_VERIFY (!(_res.options & RES_ROTATE)); */
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break;
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case 3:
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case 4:
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case 5:
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case 6:
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/* Test res_init change broadcast. This requires a second
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thread to trigger the reload. */
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#if TEST_THREAD
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support_write_file_string (_PATH_RESCONF,
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"options edns0\n"
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"nameserver 192.0.2.1\n");
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for (int iteration = 0; iteration < 2; ++iteration)
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{
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switch (test_index)
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{
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case 3:
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TEST_VERIFY (res_init () == 0);
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break;
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case 4:
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{
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unsigned char buf[512];
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TEST_VERIFY
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(res_mkquery (QUERY, test_hostname, C_IN, T_A,
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NULL, 0, NULL, buf, sizeof (buf)) > 0);
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}
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break;
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case 5:
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gethostbyname (test_hostname);
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break;
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case 6:
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{
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struct addrinfo *ai;
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(void) getaddrinfo (test_hostname, NULL, NULL, &ai);
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}
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break;
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}
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if (iteration == 0)
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{
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TEST_VERIFY (_res.options & RES_USE_EDNS0);
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TEST_VERIFY (!(_res.options & RES_ROTATE));
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TEST_VERIFY (_res.nscount == 1);
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support_write_file_string (_PATH_RESCONF,
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"options rotate\n"
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"nameserver 192.0.2.1\n"
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"nameserver 192.0.2.2\n");
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xpthread_join (xpthread_create
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(NULL, special_test_call_res_init, NULL));
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}
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else
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{
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/* edns0 was dropped, but the flag is not cleared. See
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bug 21701. */
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/* TEST_VERIFY (!(_res.options & RES_USE_EDNS0)); */
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TEST_VERIFY (_res.options & RES_ROTATE);
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TEST_VERIFY (_res.nscount == 2);
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}
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}
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#endif
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break;
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}
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}
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#if TEST_THREAD
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/* Helper function which calls special_test_callback from a
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thread. */
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static void *
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special_test_thread_func (void *closure)
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{
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special_test_callback (closure);
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return NULL;
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}
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/* Variant of special_test_callback which runs the function on a
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non-main thread. */
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static void
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run_special_test_on_thread (void *closure)
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{
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xpthread_join (xpthread_create (NULL, special_test_thread_func, closure));
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}
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#endif /* TEST_THREAD */
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/* Perform the requested special test in a subprocess using
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special_test_callback. */
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static void
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special_test (unsigned int test_index)
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{
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#if TEST_THREAD
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for (int do_thread = 0; do_thread < 2; ++do_thread)
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#endif
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{
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void (*func) (void *) = special_test_callback;
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#if TEST_THREAD
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if (do_thread)
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func = run_special_test_on_thread;
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#endif
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struct support_capture_subprocess proc
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= support_capture_subprocess (func, &test_index);
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char *test_name = xasprintf ("special test %u", test_index);
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if (strcmp (proc.out.buffer, "") != 0)
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{
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support_record_failure ();
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printf ("error: output mismatch for %s\n", test_name);
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support_run_diff ("expected", "",
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"actual", proc.out.buffer);
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}
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support_capture_subprocess_check (&proc, test_name, 0, sc_allow_stdout);
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free (test_name);
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support_capture_subprocess_free (&proc);
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}
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}
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/* Dummy DNS server. It ensures that the probe queries sent by
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gethostbyname and getaddrinfo receive a reply even if the system
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applies a very strict rate limit to localhost. */
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@ -672,6 +858,11 @@ do_test (void)
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}
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}
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/* The tests which do not follow a regular pattern. */
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for (unsigned int test_index = 0;
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test_index < special_tests_count; ++test_index)
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special_test (test_index);
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if (server > 0)
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{
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if (kill (server, SIGTERM) < 0)
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