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[gpsd-users] Shared memory client on ARM?


From: Kevin Russell
Subject: [gpsd-users] Shared memory client on ARM?
Date: Sun, 5 Jan 2014 17:26:51 -0800

I'm having trouble getting a basic client using shared memory working.
Does anyone have a working example?  Any attempt to open results in an
error return "can't get host entry."

Here's an example of what I'm running into...

address@hidden ~/client $ cat client.c
#include <gps.h>
#include <stdlib.h>
#include <errno.h>

int main(void) {
    int result;
    struct gps_data_t data;
    printf("Hello\n");
    result = gps_open(GPSD_SHARED_MEMORY,0,&data);
    printf("open returned %d %s\n",result,gps_errstr(errno));
    if (result != 0) {
        return 1;
    }
    result = gps_read(&data);
    printf("read returned %d\n",result);
    if (result != 0) {
        return 1;
    }
    result = gps_close(&data);
    printf("read returned %d\n",result);
    if (result != 0) {
        return 1;
    }
}

address@hidden ~/client $ ./client
Hello
open returned -1 can't get host entry
address@hidden ~/client $ gpsd -V
gpsd: 3.6 (revision 3.6)
address@hidden ~/client $ uname -a
Linux raspberrypi 3.10.24+ #614 PREEMPT Thu Dec 19 20:38:42 GMT 2013 armv6l
GNU/Linux
address@hidden ~/client $ /etc/init.d/gpsd status
[ ok ] gpsd is running.
address@hidden ~/client $ gpxlogger
<?xml version="1.0" encoding="utf-8"?>
<gpx version="1.1" creator="GPSD 3.6 - http://catb.org/gpsd"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns="http://www.topografix.com/GPX/1/1"
        xsi:schemaLocation="http://www.topografix.com/GPX/1/1
        http://www.topografix.com/GPX/1/1/gpx.xsd">
 <metadata>
  <time>2013-12-21T23:01:34.000Z</time>
 </metadata>
 <trk>
  <src>GPSD 3.6</src>
  <trkseg>
   <trkpt lat="45.452308" lon="-122.763872">
    <ele>-4.268000</ele>
    <time>2013-12-21T23:01:35.000Z</time>
    <src>GPSD tag="75"</src>
    <fix>3d</fix>
   </trkpt>
^C  </trkseg>
 </trk>
</gpx>

Any suggestions appreciated.


Kevin

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