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