sp: clear HUPCL to preserve control lines on close

[libserialport.git] / serialport.c

diff --git a/serialport.c b/serialport.c
index 1daba1cf58ffac67ade1c817bc387f9f62ed9a32..d088398d9bbf226eb83d1c688871198b5ed0a9f4 100644 (file)
--- a/serialport.c
+++ b/serialport.c
@@ -633,7 +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