One final tweak.

connection.c

@@ -26,19 +26,20 @@ int claim_connection(char *fname, int max_connections)
 {
 	int fd, i;
 
-	if (max_connections > 0) {
-		if ((fd = open(fname, O_RDWR|O_CREAT, 0600)) < 0)
-			return 0;
+	if (max_connections <= 0)
+		return 1;
 
-		/* Find a free spot. */
-		for (i = 0; i < max_connections; i++) {
-			if (lock_range(fd, i*4, 4))
-				return 1;
-		}
+	if ((fd = open(fname, O_RDWR|O_CREAT, 0600)) < 0)
+		return 0;
 
-		close(fd);
+	/* Find a free spot. */
+	for (i = 0; i < max_connections; i++) {
+		if (lock_range(fd, i*4, 4))
+			return 1;
 	}
 
+	close(fd);
+
 	/* A lock failure needs to return an errno of 0. */
 	errno = 0;
 	return 0;