diff options
Diffstat (limited to 'gpsctrl.c')
| -rw-r--r-- | gpsctrl.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/gpsctrl.c b/gpsctrl.c new file mode 100644 index 00000000..337fa455 --- /dev/null +++ b/gpsctrl.c @@ -0,0 +1,129 @@ +/* + * gpsctrl.c -- tweak the control settings on a GPS + */ +#include <stdio.h> +#include <stdlib.h> +#include <sys/types.h> +#include <getopt.h> +#include <stdbool.h> +#include <string.h> +#include <errno.h> +#include <assert.h> + +#include "gpsd_config.h" +#include "gps.h" + +int main(int argc, char **argv) +{ + int option, status; + char *err_str, *device = NULL, *speed = NULL; + char buf[80]; + bool to_binary = false, to_nmea = false; + struct gps_data_t *gpsdata; + + while ((option = getopt(argc, argv, "bhns:V")) != -1) { + switch (option) { + case 'b': + to_binary = true; + break; + case 'n': + to_nmea = true; + break; + case 's': + speed = optarg; + break; + case 'V': + (void)fprintf(stderr, "gpsctrl at svn revision $Rev$\n"); + break; + case 'h': + default: + fprintf(stderr, "usage: gpsctrl [-b | -n] [-s speed] [-V]\n"); + break; + } + } + + if (optind < argc) + device = argv[optind]; + + if (to_nmea && to_binary) { + (void)fprintf(stderr, "gpsctrl: make up your mind, would you?\n"); + exit(0); + } + + if (speed==NULL && !to_nmea && !to_binary) + exit(0); + + /* Open the stream to gpsd. */ + /*@i@*/gpsdata = gps_open(NULL, NULL); + if (!gpsdata) { + switch (errno) { + case NL_NOSERVICE: err_str = "can't get service entry"; break; + case NL_NOHOST: err_str = "can't get host entry"; break; + case NL_NOPROTO: err_str = "can't get protocol entry"; break; + case NL_NOSOCK: err_str = "can't create socket"; break; + case NL_NOSOCKOPT: err_str = "error SETSOCKOPT SO_REUSEADDR"; break; + case NL_NOCONNECT: err_str = "can't connect to host"; break; + default: err_str = "Unknown"; break; + } + (void)fprintf( stderr, + "gpsctrl: no gpsd running or network error: %d, %s\n", + errno, err_str); + exit(2); + } + + (void)gps_query(gpsdata, "k\n"); + if (gpsdata->ndevices == 0) { + (void)fprintf(stderr, "gpsctrl: no devices connected.\n"); + (void)gps_close(gpsdata); + exit(1); + } else if (gpsdata->ndevices > 1 && device == NULL) { + (void)fprintf(stderr, + "gpsctrl: multiple devices and no device specified.\n"); + (void)gps_close(gpsdata); + exit(1); + } + + if (gpsdata->ndevices > 1) { + int i; + assert(device != NULL); + for (i = 0; i < gpsdata->ndevices; i++) + if (strcmp(device, gpsdata->devicelist[i]) == 0) + goto foundit; + (void)fprintf(stderr, "gpsctrl: specified device not found.\n"); + (void)gps_close(gpsdata); + exit(1); + foundit: + (void)strcpy(buf, "F="); + (void)strncat(buf, device, sizeof(buf)-3); + (void)strcat(buf, "\n"); + (void)gps_query(gpsdata, buf); + } + + status = 0; + if (to_nmea) { + (void)gps_query(gpsdata, "n=0\n"); + if (gpsdata->driver_mode != 0) { + (void)fprintf(stderr, "gpsctrl: mode change failed\n"); + status = 1; + } + } + else if (to_binary) { + (void)gps_query(gpsdata, "n=1\n"); + if (gpsdata->driver_mode != 1) { + (void)fprintf( stderr, "gpsctrl: mode change failed\n"); + status = 1; + } + } + if (speed != NULL) { + (void)strcpy(buf, "B="); + (void)strncat(buf, speed, sizeof(buf)-3); + (void)strcat(buf, "\n"); + (void)gps_query(gpsdata, buf); + if (atoi(speed) != (int)gpsdata->baudrate) { + (void)fprintf( stderr, "gpsctrl: speed change failed\n"); + status = 1; + } + } + (void)gps_close(gpsdata); + exit(status); +} |