gpsctl: fix busy loop waiting for device

Signed-off-by: Gary E. Miller <gem@rellim.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/gpsctl.c b/gpsctl.c
index 57fb4693..737a30e2 100644
--- a/gpsctl.c
+++ b/gpsctl.c
@@ -436,6 +436,12 @@ int main(int argc, char **argv)
 	    }
 
 	    while (devcount > 0) {
+		/* Wait for input data */
+		if (!gps_waiting(&gpsdata, timeout * 1000000)) {
+			gpsd_log(&context.errout, LOG_ERROR, "timed out waiting for device\n");
+			(void)gps_close(&gpsdata);
+			exit(EXIT_FAILURE);
+		}
 		errno = 0;
 		if (gps_read(&gpsdata, NULL, 0) == -1) {
 		    gpsd_log(&context.errout, LOG_ERROR, "data read failed.\n");