X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/hmcfgusb/blobdiff_plain/47ea478b44e3c529201c6678f5e2cbbe0fc60bf9..a65c08fc834ac57cb4aab5470ca144d13076a2bd:/culfw.c

diff --git a/culfw.c b/culfw.c
index 1904bb7..a4c949b 100644
--- a/culfw.c
+++ b/culfw.c
@@ -1,6 +1,6 @@
 /* culfw driver
  *
- * Copyright (c) 2013 Michael Gernoth <michael@gernoth.net>
+ * Copyright (c) 2014 Michael Gernoth <michael@gernoth.net>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to
@@ -167,10 +167,42 @@ int culfw_poll(struct culfw_dev *dev, int timeout)
 
 	dev->cb(buf, r, dev->cb_data);
 
-	return pfds[0].fd;
+	errno = 0;
+	return -1;
 }
 
 void culfw_close(struct culfw_dev *dev)
 {
 	close(dev->fd);
 }
+
+void culfw_flush(struct culfw_dev *dev)
+{
+	struct pollfd pfds[1];
+	int ret;
+	int r = 0;
+	uint8_t buf[1024];
+
+	tcflush(dev->fd, TCIOFLUSH);
+
+	while(1) {
+		memset(pfds, 0, sizeof(struct pollfd) * 1);
+
+		pfds[0].fd = dev->fd;
+		pfds[0].events = POLLIN;
+
+		ret = poll(pfds, 1, 100);
+		if (ret <= 0)
+			break;
+
+		if (!(pfds[0].revents & POLLIN))
+			break;
+
+		memset(buf, 0, sizeof(buf));
+		r = read(dev->fd, buf, sizeof(buf));
+		if (r <= 0)
+			break;
+	}
+
+	return;
+}