Add a minimal PPS driver.

Now gpsctl, and friends, can return a pretty device name.  And avoids
a segfault on empty *device.

1 files changed, 1 insertions, 0 deletions

diff --git a/serial.c b/serial.c
index a81081d9..29f14d17 100644
--- a/serial.c
+++ b/serial.c
@@ -421,6 +421,7 @@ int gpsd_serial_open(struct gps_device_t *session)
 
     /* we may need to hold on to this slot without opening the device */ 
     if (source_pps == session->sourcetype) {
+	(void)gpsd_switch_driver(session, "PPS");
 	return PLACEHOLDING_FD;
     }