diff --git a/lib/ChangeLog b/lib/ChangeLog
index ac05bab..40e73ff 100644
--- a/lib/ChangeLog
+++ b/lib/ChangeLog
@@ -1,3 +1,9 @@
+2005-02-17 Andrew J. Schorr <ajschorr@alumni.princeton.edu>
+
+	* network.h: Define a new ERRNO_IO_RETRY macro to test whether an I/O
+	  operation should be retried.  This eliminates the need to duplicate
+	  the same logic testing for EAGAIN or EINTR in multiple places.
+
 2005-02-16 Andrew J. Schorr <ajschorr@alumni.princeton.edu>
 
 	* stream.h: Declare new function stream_read_try suitable for use
diff --git a/lib/network.h b/lib/network.h
index 589b80e..9333ef8 100644
--- a/lib/network.h
+++ b/lib/network.h
@@ -33,4 +33,8 @@
    -1 on error. */
 extern int set_nonblocking(int fd);
 
+/* Does the I/O error indicate that the operation should be retried later? */
+#define ERRNO_IO_RETRY(EN) \
+	(((EN) == EAGAIN) || ((EN) == EWOULDBLOCK) || ((EN) == EINTR))
+
 #endif /* _ZEBRA_NETWORK_H */