blocking read is not blocking

serial/t.c

@@ -1,28 +1,36 @@
 
 
 #include  <stdio.h>
+#include  <stdlib.h>
 #include  <time.h>
 
 #include  "serial.h"
 
+int	verbosity;
+
 int main (int argc, char *argv[])
 {
-int	serial_in;
-int	byte, foo, to;
+int		serial_in;
+int		byte;
 
-serial_in = prepare_UART("/dev/ttyS0", 9600);
+serial_in = prepare_UART("/dev/ttyACM0", 9600);
 fprintf(stderr, "prepare uart -> %d\n", serial_in);
 
-for (foo=0; foo<20; foo++) {
-	to = (foo+1) * 666;
-	byte = getbyte_to(serial_in, to);
+if (serial_in < 0) {
+	exit(1);
+	}
+
+for (;;) {
+
+	byte = getbyte(serial_in);
+
 	if (byte < 0) {
 		fprintf(stderr, "get byte : err is %d\n", byte);
 		}
-	// XXX else	{
-		printf("%9ld   %6d   %6d    %02x\n",
-				time(NULL), foo, to, byte);
-	// XXX	}
+	else	{
+		printf("%9ld  %02x/%d\n",
+			time(NULL), byte, byte);
+		}
 	}
 
 return 0;