x5/khatus_sensor_time.c

   1 #include <errno.h>
   2 #include <stdarg.h>
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <time.h>
   7 #include <unistd.h>
   8
   9 #include "khatus_lib_log.h"
  10 #include "khatus_lib_time.h"
  11
  12 char *argv0;
  13
  14 void
  15 usage()
  16 {
  17         printf(
  18             "%s: [OPT ...]\n"
  19             "\n"
  20             "OPT = -i int     # interval\n"
  21             "    | -f string  # format string\n"
  22             "    | -h         # help message (i.e. what you're reading now :) )\n",
  23             argv0);
  24         fatal("usage\n");
  25 }
  26
  27 int
  28 main(int argc, char **argv)
  29 {
  30         argv0 = argv[0];
  31
  32         double opt_interval = 1.0;
  33         char *opt_fmt = "%a %b %d %H:%M:%S";
  34
  35         time_t t;
  36         struct timespec ti;
  37         char buf[128];
  38         char c;
  39
  40         memset(buf, '\0', 128);
  41         while ((c = getopt(argc, argv, "f:i:h")) != -1)
  42                 switch (c) {
  43                 case 'f':
  44                         opt_fmt = calloc(strlen(optarg), sizeof(char));
  45                         strcpy(opt_fmt, optarg);
  46                         break;
  47                 case 'i':
  48                         opt_interval = atof(optarg);
  49                         break;
  50                 case 'h':
  51                         usage();
  52                         break;
  53                 default:
  54                         usage();
  55                 }
  56         ti = timespec_of_float(opt_interval);
  57         for (;;) {
  58                 t = time(NULL);
  59                 strftime(buf, sizeof(buf), opt_fmt, localtime(&t));
  60                 puts(buf);
  61                 fflush(stdout);
  62                 snooze(&ti);
  63         }
  64         return EXIT_SUCCESS;
  65 }