libnjb: settime.c

# settime.c

    #include "common.h"
    #include <string.h>

    static char *prompt (const char *prompt, char *buffer, size_t bufsz, int required)
    {
      char *cp, *bp;

      while (1) {
        fprintf(stdout, "%s> ", prompt);
        if ( fgets(buffer, bufsz, stdin) == NULL ) {
          if (ferror(stdin)) {
            perror("fgets");
          } else {
            fprintf(stderr, "EOF on stdin\n");
          }
          return NULL;
        }

        cp= strrchr(buffer, '\n');
        if ( cp != NULL ) *cp= '\0';

        bp= buffer;
        while ( bp != cp ) {
          if ( *bp != ' ' && *bp != '\t' ) return bp;
          bp++;
        }

        if (! required) return bp;
      }
    }

    static void dumptime(njb_time_t *time)
    {
      if (time != NULL) {
        switch(time->weekday) {
        case 0:
          printf("Sunday ");
          break;
        case 1:
          printf("Monday ");
          break;
        case 2:
          printf("Tuesday ");
          break;
        case 3:
          printf("Wednesday ");
          break;
        case 4:
          printf("Thursday ");
          break;
        case 5:
          printf("Friday ");
          break;
        case 6:
          printf("Saturday ");
        }
        /* OK this is the way we write dates
         * in Sweden, you may change it if you
         * don't like it!
         */
        printf("%u-%.2u-%.2u ", time->year,
               time->month, time->day);
        printf("%.2u:%.2u:%.2u\n", time->hours,
               time->minutes, time->seconds);
      }
    }

    int main(int argc, char **argv)
    {
      njb_t njbs[NJB_MAX_DEVICES], *njb;
      extern char *optarg;
      int opt;
      int n, debug;
      njb_time_t *time;
      char *pnum;
      char num[80];

      debug = 0;
      while ((opt = getopt(argc, argv, "D:")) != -1) {
        switch (opt) {
        case 'D':
          debug = atoi(optarg);
          break;
        default:
          fprintf(stderr, "usage: settime [ -D debuglvl ]\n");
          return 1;
        }
      }

      if (debug)
        NJB_Set_Debug(debug);

      if (NJB_Discover(njbs, 0, &n) == -1) {
        fprintf(stderr, "could not locate any jukeboxes\n");
        return 1;
      }

      if (n == 0) {
        fprintf(stderr, "no NJB devices found\n");
        return 0;
      }

      njb = njbs;

      if (NJB_Open(njb) == -1) {
        NJB_Error_Dump(njb,stderr);
        return 1;
      }

      if (NJB_Capture(njb) == -1) {
        NJB_Error_Dump(njb,stderr);
        return 1;
      }

      time = NJB_Get_Time(njb);

      printf("The time on the jukebox is:\n");
      dumptime(time);

      printf("\nNew time (old values preserved if left blank):\n");

      if ( (pnum= prompt("Year:", num, 80, 0)) == NULL ) return 1;
      if ( strlen(pnum) ) {
        time->year= (u_int16_t) strtoul(pnum, 0, 10);
      }

      if ( (pnum= prompt("Month (1-12):", num, 80, 0)) == NULL ) return 1;
      if ( strlen(pnum) ) {
        time->month= (u_int16_t) strtoul(pnum, 0, 10);
      }

      if ( (pnum= prompt("Day:", num, 80, 0)) == NULL ) return 1;
      if ( strlen(pnum) ) {
        time->day= (u_int16_t) strtoul(pnum, 0, 10);
      }

      if ( (pnum= prompt("Weekday (0-6):", num, 80, 0)) == NULL ) return 1;
      if ( strlen(pnum) ) {
        time->weekday= (u_int16_t) strtoul(pnum, 0, 10);
      }

      if ( (pnum= prompt("Hours (0-23):", num, 80, 0)) == NULL ) return 1;
      if ( strlen(pnum) ) {
        time->hours= (u_int16_t) strtoul(pnum, 0, 10);
      }

      if ( (pnum= prompt("Minutes (0-59):", num, 80, 0)) == NULL ) return 1;
      if ( strlen(pnum) ) {
        time->minutes= (u_int16_t) strtoul(pnum, 0, 10);
      }

      if ( (pnum= prompt("Seconds (0-59):", num, 80, 0)) == NULL ) return 1;
      if ( strlen(pnum) ) {
        time->seconds= (u_int16_t) strtoul(pnum, 0, 10);
      }

      printf("The time on the jukebox is being set to:\n");
      dumptime(time);

      if (NJB_Set_Time(njb, time) == -1) {
        NJB_Error_Dump(njb,stderr);
      }

      NJB_Destroy_Time(time);

      NJB_Release(njb);

      NJB_Close(njb);
      return 0;
    }