--- src/multimeter.c.orig	2007-02-10 22:48:00.000000000 +0100
+++ src/multimeter.c	2007-02-10 22:48:46.000000000 +0100
@@ -90,8 +90,10 @@
     			struct timeval timeout;
     			struct timeval time_now;
 
-			write(fd, "D", 1);
+			if (write(fd, "D", 1) == -1) {
+			    perror("unable to write D on file descriptor: ");
+			}
 
 			FD_ZERO(&rfds);
 			FD_SET(fd, &rfds);