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gpsdate
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perform up to 60 attmepts to re-connect to gpsd and print more status

This commit is contained in:
Harald Welte 2013-04-10 12:11:12 +02:00
parent 346b5d00a9
commit a1aa41e813
1 changed files with 21 additions and 3 deletions
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24
gpsdate.c
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@ -31,10 +31,15 @@
#include <stdlib.h> #include <stdlib.h>
#include <stdio.h> #include <stdio.h>
#include <errno.h> #include <errno.h>
#include <unistd.h>
#include <string.h>
#include <sys/time.h> #include <sys/time.h>
#include <gps.h> #include <gps.h>
#define NUM_RETRIES 60 /* Number of gpsd re-connects */
#define RETRY_SLEEP 1 /* Seconds to sleep between re-connects */
static struct gps_data_t gpsdata; static struct gps_data_t gpsdata;
static void callback(struct gps_data_t *gpsdata) static void callback(struct gps_data_t *gpsdata)
@ -51,20 +56,33 @@ static void callback(struct gps_data_t *gpsdata)
rc = settimeofday(&tv, NULL); rc = settimeofday(&tv, NULL);
gps_close(gpsdata); gps_close(gpsdata);
if (rc == 0) if (rc == 0) {
printf("Successfully set RTC time to GPSD time\n");
exit(EXIT_SUCCESS); exit(EXIT_SUCCESS);
else } else {
fprintf(stderr, "Error setting RTC: %d (%s)\n",
errno, strerror(errno));
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
}
} }
int main(int argc, char **argv) int main(int argc, char **argv)
{ {
char *host = "localhost"; char *host = "localhost";
int i, rc;
if (argc > 1) if (argc > 1)
host = argv[1]; host = argv[1];
if (gps_open(host, DEFAULT_GPSD_PORT, &gpsdata)) { for (i = 1; i <= NUM_RETRIES; i++) {
printf("Attempt #%d to connect to gpsd at %s...\n", i, host);
rc = gps_open(host, DEFAULT_GPSD_PORT, &gpsdata);
if (!rc)
break;
sleep(RETRY_SLEEP);
}
if (rc) {
fprintf(stderr, "no gpsd running or network error: %d, %s\n", fprintf(stderr, "no gpsd running or network error: %d, %s\n",
errno, gps_errstr(errno)); errno, gps_errstr(errno));
exit(EXIT_FAILURE); exit(EXIT_FAILURE);