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Unix/Linux 网络时间协议版本3 Network Time Protocol Version 3 (NTP) distribution for Unix systems

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--- ntp_io.c-	Wed Feb 12 15:54:38 1997
+++ ntp_io.c	Wed Feb 12 15:58:20 1997
@@ -2286,7 +2286,7 @@
   mask = sigmask(SIGIO) | sigmask(SIGALRM);
   omask = sigblock(0);
   omask &= ~mask;
-  if (sigpause(omask))
+  if (sigpause(omask) && (errno != EINTR))
     msyslog(LOG_ERR, "wait_for_signal: sigspause() failed: %m");
 }
 # endif /* HAVE_SIGACTION */