sp: clear HUPCL to preserve control lines on close

[libserialport.git] / serialport.c

diff --git a/serialport.c b/serialport.c
index 51fe0788fc4abd015adc9768d63c9288ac9e0593..d088398d9bbf226eb83d1c688871198b5ed0a9f4 100644 (file)
--- a/serialport.c
+++ b/serialport.c
@@ -155,10 +155,7 @@ SP_API enum sp_transport sp_get_port_transport(const struct sp_port *port)
 {
        TRACE("%p", port);
 
-       if (!port)
-               RETURN_ERROR(SP_ERR_ARG, "Null port");
-
-       RETURN_INT(port->transport);
+       RETURN_INT(port ? port->transport : SP_TRANSPORT_NATIVE);
 }
 
 SP_API enum sp_return sp_get_port_usb_bus_address(const struct sp_port *port,
@@ -636,7 +633,8 @@ SP_API enum sp_return sp_open(struct sp_port *port, enum sp_mode flags)
        data.term.c_cc[VTIME] = 0;
 
        /* Ignore modem status lines; enable receiver; leave control lines alone on close. */
-       data.term.c_cflag |= (CLOCAL | CREAD | HUPCL);
+       data.term.c_cflag |= (CLOCAL | CREAD);
+       data.term.c_cflag &= ~(HUPCL);
 #endif
 
 #ifdef _WIN32