X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fnanosleep.m4;h=a3a6814042ec6909d8dc9887f096d4f7d43cc42c;hb=8e74296348d2d5197a301ebf8c8b1e4342088ad3;hp=af346b6cfc6fb23a094edaadc30f6766fb145460;hpb=3ac9552429c5a500717e1d3d129c32f7d0ea37a3;p=gnulib.git

diff --git a/m4/nanosleep.m4 b/m4/nanosleep.m4
index af346b6cf..a3a681404 100644
--- a/m4/nanosleep.m4
+++ b/m4/nanosleep.m4
@@ -1,4 +1,4 @@
-#serial 21
+#serial 22
 
 dnl From Jim Meyering.
 dnl Check for the nanosleep function.
@@ -17,6 +17,7 @@ AC_DEFUN([gl_FUNC_NANOSLEEP],
  dnl Persuade glibc and Solaris <time.h> to declare nanosleep.
  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
 
+ AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS])
  AC_REQUIRE([gl_CLOCK_TIME])
  AC_CHECK_HEADERS_ONCE(sys/time.h)
 
@@ -60,14 +61,20 @@ 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;