Tests for module 'printf-frexpl'.

[gnulib.git] / m4 / nanosleep.m4

diff --git a/m4/nanosleep.m4 b/m4/nanosleep.m4
index af346b6..a03c37c 100644 (file)
--- a/m4/nanosleep.m4
+++ b/m4/nanosleep.m4
@@ -60,14 +60,20 @@ AC_DEFUN([gl_FUNC_NANOSLEEP],
          static struct timespec ts_sleep;
          static struct timespec ts_remaining;
          static struct sigaction act;
+         if (! nanosleep)
+           return 1;
          act.sa_handler = check_for_SIGALRM;
-          sigemptyset (&act.sa_mask);
+         sigemptyset (&act.sa_mask);
          sigaction (SIGALRM, &act, NULL);
+         ts_sleep.tv_sec = 0;
+         ts_sleep.tv_nsec = 1;
+         alarm (1);
+         if (nanosleep (&ts_sleep, NULL) != 0)
+           return 1;
          ts_sleep.tv_sec = TYPE_MAXIMUM (time_t);
          ts_sleep.tv_nsec = 999999999;
          alarm (1);
          if (nanosleep (&ts_sleep, &ts_remaining) == -1 && errno == EINTR
-             && nanosleep
              && TYPE_MAXIMUM (time_t) - 10 < ts_remaining.tv_sec)
            return 0;
          return 119;