[RFC PATCH] tst: Add test for gai_suspend

[Lukasz Majewski <lukma@denx.de>]

---
 resolv/Makefile          |  2 ++
 resolv/tst-gai_suspend.c | 53 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 55 insertions(+)
 create mode 100644 resolv/tst-gai_suspend.c

diff --git a/resolv/Makefile b/resolv/Makefile
index 1047bb6ae5..e7e66fe903 100644
--- a/resolv/Makefile
+++ b/resolv/Makefile
@@ -60,6 +60,7 @@ tests += \
   tst-resolv-res_init-multi \
   tst-resolv-search \
   tst-resolv-trailing \
+  tst-gai_suspend \
 
 # This test calls __res_context_send directly, which is not exported
 # from libresolv.
@@ -209,3 +210,4 @@ $(objpfx)tst-ns_name_compress: $(objpfx)libresolv.so
 $(objpfx)tst-ns_name_pton: $(objpfx)libresolv.so
 $(objpfx)tst-res_hnok: $(objpfx)libresolv.so
 $(objpfx)tst-p_secstodate: $(objpfx)libresolv.so
+$(objpfx)tst-gai_suspend: $(objpfx)libanl.so
diff --git a/resolv/tst-gai_suspend.c b/resolv/tst-gai_suspend.c
new file mode 100644
index 0000000000..bbafd13fc4
--- /dev/null
+++ b/resolv/tst-gai_suspend.c
@@ -0,0 +1,53 @@
+/* Test for gai_suspend timeout
+   Copyright (C) 2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <time.h>
+#include <netdb.h>
+#include <errno.h>
+#include <string.h>
+#include <support/check.h>
+#include <support/xtime.h>
+#include <support/timespec.h>
+
+static int
+do_test (void)
+{
+  struct timespec ts;
+  xclock_gettime (CLOCK_REALTIME, &ts);
+  struct timespec timeout = make_timespec (1, 0);
+  ts = timespec_add (ts, timeout);
+
+  /* Ignore gaicb content - just wait for timeout.  */
+  struct addrinfo result;
+
+  struct gaicb gai = { "foo.baz", "0", NULL, &result };
+  const struct gaicb * const gai_s[] = { &gai };
+  struct gaicb *gai_p = &gai;
+
+  int ret = getaddrinfo_a (GAI_NOWAIT, &gai_p, 1, NULL);
+  if (ret != 0)
+    FAIL_EXIT1 ("getaddrinfo_a failed: %m\n");
+
+  ret = gai_suspend (gai_s, 1, &timeout);
+  TEST_COMPARE (ret, EAI_AGAIN);
+  TEST_TIMESPEC_NOW_OR_AFTER (CLOCK_REALTIME, ts);
+
+  return 0;
+}
+
+#include <support/test-driver.c>
-- 
2.20.1