diff --git a/lib/get.c b/lib/get.c
index da061a1..e7ea066 100644
--- a/lib/get.c
+++ b/lib/get.c
@@ -150,3 +150,49 @@ comedi_range * comedi_get_range(comedi_t *it,unsigned int subdevice,unsigned int
 
 
 
+int comedi_get_buffer_size(comedi_t *it,unsigned int subd)
+{
+	comedi_bufconfig bc;
+	int ret;
+
+	memset(&bc,0,sizeof(bc));
+
+	bc.subdevice = subd;
+	
+	ret = ioctl(it->fd, COMEDI_BUFCONFIG, &bc);
+	if(ret<0)return -1;
+
+	return bc.size;
+}
+
+int comedi_get_max_buffer_size(comedi_t *it,unsigned int subd)
+{
+	comedi_bufconfig bc;
+	int ret;
+
+	memset(&bc,0,sizeof(bc));
+
+	bc.subdevice = subd;
+	
+	ret = ioctl(it->fd, COMEDI_BUFCONFIG, &bc);
+	if(ret<0)return -1;
+
+	return bc.maximum_size;
+}
+
+int comedi_set_buffer_size(comedi_t *it,unsigned int subd,int size)
+{
+	comedi_bufconfig bc;
+	int ret;
+
+	memset(&bc,0,sizeof(bc));
+
+	bc.subdevice = subd;
+	bc.size = size;
+	
+	ret = ioctl(it->fd, COMEDI_BUFCONFIG, &bc);
+	if(ret<0)return -1;
+
+	return bc.size;
+}
+