2004-12-29 Roland McGrath <roland@redhat.com>

	[BZ #626]
	* sysdeps/unix/alarm.c (alarm): Round return value to nearest rather
	than always up; when nearest is zero, round up to one.

diff --git a/sysdeps/unix/alarm.c b/sysdeps/unix/alarm.c
index ae77782c5471d6aed53d6728ef80065f186f8843..dafada76b588219f9a27db3b1e27ebaaf58bd7a4 100644 (file)
--- a/sysdeps/unix/alarm.c
+++ b/sysdeps/unix/alarm.c
@@ -41,7 +41,10 @@ alarm (seconds)
     return 0;
 
   retval = old.it_value.tv_sec;
-  if (old.it_value.tv_usec)
+  /* Round to the nearest second, but never report zero seconds when
+     the alarm is still set.  */
+  if (old.it_value.tv_usec >= 500000
+      || (retval == 0 && old.it_value.tv_usec > 0))
     ++retval;
   return retval;
 }