--- /dev/null
+/* Test of nanosleep() function.
+ Copyright (C) 2009 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009. */
+
+#include <config.h>
+
+#include <time.h>
+
+#include <errno.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "intprops.h"
+
+#define ASSERT(expr) \
+ do \
+ { \
+ if (!(expr)) \
+ { \
+ fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
+ fflush (stderr); \
+ abort (); \
+ } \
+ } \
+ while (0)
+
+#if HAVE_DECL_ALARM
+static void
+handle_alarm (int sig)
+{
+ if (sig != SIGALRM)
+ _exit (1);
+}
+#endif
+
+int
+main()
+{
+ struct timespec ts;
+
+ ts.tv_sec = 1000;
+ ts.tv_nsec = -1;
+ errno = 0;
+ ASSERT (nanosleep (&ts, NULL) == -1);
+ ASSERT (errno == EINVAL);
+ ts.tv_nsec = 1000000000;
+ errno = 0;
+ ASSERT (nanosleep (&ts, NULL) == -1);
+ ASSERT (errno == EINVAL);
+
+ ts.tv_sec = 0;
+ ts.tv_nsec = 1;
+ ASSERT (nanosleep (&ts, &ts) == 0);
+ /* Remaining time is only defined on EINTR failure; but on success,
+ it is typically either 0 or unchanged from input. At any rate,
+ it shouldn't be randomly changed to unrelated values. */
+ ASSERT (ts.tv_sec == 0);
+ ASSERT (ts.tv_nsec == 0 || ts.tv_nsec == 1);
+ ts.tv_nsec = 0;
+ ASSERT (nanosleep (&ts, NULL) == 0);
+
+#if HAVE_DECL_ALARM
+ {
+ const time_t pentecost = 50 * 24 * 60 * 60; /* 50 days. */
+ signal (SIGALRM, handle_alarm);
+ alarm (1);
+ ts.tv_sec = pentecost;
+ ts.tv_nsec = 999999999;
+ errno = 0;
+ ASSERT (nanosleep (&ts, &ts) == -1);
+ ASSERT (errno == EINTR);
+ ASSERT (pentecost - 10 < ts.tv_sec && ts.tv_sec <= pentecost);
+ ASSERT (0 <= ts.tv_nsec && ts.tv_nsec <= 999999999);
+ }
+#endif
+
+ return 0;
+}