From 8b211ae74a29459ee6ad322d29aca768480cd95e Mon Sep 17 00:00:00 2001
From: "Steinar H. Gunderson" <sgunderson@bigfoot.com>
Date: Wed, 31 Oct 2018 22:46:15 +0100
Subject: [PATCH] Make the bodet client read from a serial port.

---
 client/bodet.cpp | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/client/bodet.cpp b/client/bodet.cpp
index b9eecc9..0c94116 100644
--- a/client/bodet.cpp
+++ b/client/bodet.cpp
@@ -1,7 +1,9 @@
 // Bodet BT-6000 decoder.
 
+#include <fcntl.h>
 #include <stdio.h>
 #include <string.h>
+#include <termios.h>
 #include <unistd.h>
 
 #include <string>
@@ -68,13 +70,29 @@ int main(int argc, char **argv)
 	}
 	saddr6.sin6_port = htons(port);
 
-	// TODO: open serial port
+	const char *serialpath = "/dev/ttyUSB0";
+	if (argc >= 4) {
+		serialpath = argv[3];
+	}
+	int serialfd = open(serialpath, O_RDWR);
+	if (serialfd == -1) {
+		perror(serialpath);
+		exit(1);
+	}
+
+	struct termios options;
+	memset(&options, 0, sizeof(options));
+	options.c_cflag = B9600 | CS8 | CLOCAL | CREAD;
+	options.c_iflag = IGNBRK | IGNPAR;
+	options.c_lflag = 0;
+	options.c_cc[VMIN] = 1;  // Blocking read, minimum one byte.
+	tcsetattr(serialfd, TCSANOW, &options);
 
 	string buf;
 
 	for ( ;; ) {
 		char ch;
-		int ret = read(0, &ch, 1);
+		int ret = read(serialfd, &ch, 1);
 		if (ret == -1) {
 			perror("read");
 			exit(1);
@@ -84,6 +102,7 @@ int main(int argc, char **argv)
 			exit(1);
 		}
 
+		putchar(ch);
 		if (ch == 1) {  // SOH
 			buf = ch;
 			continue;
-- 
2.39.2