mygps1.c

// gcc -o mygps mygps.c -lm -lgps

#include <gps.h>
#include <unistd.h>
#include <time.h>
#include <errno.h>
#include <stdlib.h>

int main() {
 time_t aclock;
 struct gps_data_t gps_data;
 char gps_text[1000];

 // opens the daemon socket
if (gps_open(GPSD_SHARED_MEMORY,NULL,&gps_data) != 0) {
	(void)sprintf(gps_text,
	"gpsd: no gpsd running or network error: %d, %s\n",
    errno, gps_errstr(errno));
	exit(EXIT_FAILURE);
    }
 
 
   // Blocking read for data from the daemon socket
    gps_read(&gps_data);

sprintf(gps_text,"GPS data - ");

    // print fix conditions
    switch (gps_data.fix.mode) {
        case MODE_3D: sprintf(gps_text,"%s3d-fix",gps_text); break;
        case MODE_2D: sprintf(gps_text,"%s2d-fix",gps_text); break;
        case MODE_NO_FIX: sprintf(gps_text,"%sno-fix",gps_text); break;
        default: sprintf(gps_text,"%sempty-fix",gps_text); break;
    }

    // prints position
    sprintf(gps_text,"%s, lat: %f°",gps_text,gps_data.fix.latitude);
    sprintf(gps_text,"%s%c, ",gps_text,(gps_data.fix.latitude < 0) ? 'S' : 'N');
    sprintf(gps_text,"%slon: %f°",gps_text,gps_data.fix.longitude);
    sprintf(gps_text,"%s%c, ",gps_text,(gps_data.fix.longitude < 0) ? 'W' : 'E');
    // prints speed
    sprintf(gps_text,"%sspeed: %.2f km/h, ",gps_text,3.6 * gps_data.fix.speed);
    // print local gpstime
    aclock = gps_data.fix.time; 
    sprintf(gps_text,"%stime: %s",gps_text,ctime(&aclock));


printf("%s\n", gps_text);

    // Close the daemon socket and end the session.
    gps_close(&gps_data);
}