1 files changed, 57 insertions, 0 deletions
diff --git a/time/tst-clock_nanosleep.c b/time/tst-clock_nanosleep.c
new file mode 100644
index 0000000000..f5df327e2f
--- /dev/null
+++ b/time/tst-clock_nanosleep.c
@@ -0,0 +1,57 @@
+/* Copyright (C) 2003-2019 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
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include <time.h>
+
+
+/* Test that clock_nanosleep() does sleep.  */
+static int
+do_test (void)
+{
+  /* Current time.  */
+  struct timeval tv1;
+  (void) gettimeofday (&tv1, NULL);
+
+  struct timespec ts;
+  ts.tv_sec = 1;
+  ts.tv_nsec = 0;
+  TEMP_FAILURE_RETRY (clock_nanosleep (CLOCK_REALTIME, 0, &ts, &ts));
+
+  /* At least one second must have passed.  */
+  struct timeval tv2;
+  (void) gettimeofday (&tv2, NULL);
+
+  tv2.tv_sec -= tv1.tv_sec;
+  tv2.tv_usec -= tv1.tv_usec;
+  if (tv2.tv_usec < 0)
+    --tv2.tv_sec;
+
+  if (tv2.tv_sec < 1)
+    {
+      puts ("clock_nanosleep didn't sleep long enough");
+      return 1;
+    }
+
+  return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"