-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 */