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-rw-r--r--rt/tst-clock2.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/rt/tst-clock2.c b/rt/tst-clock2.c
new file mode 100644
index 0000000..4c8fb9f
--- /dev/null
+++ b/rt/tst-clock2.c
@@ -0,0 +1,43 @@
+/* Test setting the monotonic clock. */
+
+#include <time.h>
+#include <unistd.h>
+
+#if defined CLOCK_MONOTONIC && defined _POSIX_MONOTONIC_CLOCK
+
+# include <errno.h>
+# include <stdio.h>
+
+static int
+do_test (void)
+{
+ if (sysconf (_SC_MONOTONIC_CLOCK) <= 0)
+ return 0;
+
+ struct timespec ts;
+ if (clock_gettime (CLOCK_MONOTONIC, &ts) != 0)
+ {
+ puts ("clock_gettime(CLOCK_MONOTONIC) failed");
+ return 1;
+ }
+
+ /* Setting the monotonic clock must fail. */
+ if (clock_settime (CLOCK_MONOTONIC, &ts) != -1)
+ {
+ puts ("clock_settime(CLOCK_MONOTONIC) did not fail");
+ return 1;
+ }
+ if (errno != EINVAL)
+ {
+ printf ("clock_settime(CLOCK_MONOTONIC) set errno to %d, expected %d\n",
+ errno, EINVAL);
+ return 1;
+ }
+ return 0;
+}
+# define TEST_FUNCTION do_test ()
+
+#else
+# define TEST_FUNCTION 0
+#endif
+#include "../test-skeleton.c"