git.itanic.dy.fi Git - log-plotter/blob - options.c

   1 #include <getopt.h>
   2 #include <string.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5
   6 #include "options.h"
   7 #include "debug.h"
   8
   9 void print_help_and_die(const char *exec_name)
  10 {
  11         pr_info("Usage: %s [option]\n", exec_name);
  12         pr_info("  -d, --device=DEVICE     path to the serial device\n");
  13         pr_info("                          default: /dev/ttyUSB0\n");
  14         pr_info("  -b, --baud=BAUD         device baud rate, default 128000\n");
  15         pr_info("  -o, --output            logfile path, stdout only if omited\n");
  16         pr_info("  -v, --verbose           increase verbosity\n");
  17         pr_info("  -q, --quiet             decrease verbosity\n");
  18         pr_info("  -h, --help              show this help\n");
  19
  20         exit(0);
  21 }
  22
  23 static void set_default_options(struct plotter_options *opts)
  24 {
  25         bzero(opts, sizeof(*opts));
  26
  27         opts->baud_rate = 128000;
  28         opts->device_path = "/dev/ttyUSB0";
  29 }
  30
  31 int read_args(int argc, char *argv[], struct plotter_options *opts)
  32 {
  33         int option_index = 0, c;
  34         static struct option long_options[] = {
  35                 { .val = 'd', .name = "device", .has_arg = 1, },
  36                 { .val = 'o', .name = "output", .has_arg = 1 },
  37                 { .val = 'b', .name = "baud", .has_arg = 1 },
  38                 { .val = 'v', .name = "verbose", .has_arg = 2 },
  39                 { .val = 'q', .name = "quiet", },
  40                 { .val = 'h', .name = "help", },
  41         };
  42         char short_options[] = "d:o:b:vqh";
  43
  44         set_default_options(opts);
  45
  46         while (1) {
  47                 c = getopt_long(argc, argv, short_options, long_options,
  48                                 &option_index);
  49
  50                 if (c == -1)
  51                         break;
  52
  53                 switch (c) {
  54                 case 'd':
  55                         opts->device_path = optarg;
  56                         break;
  57                 case 'o':
  58                         opts->output_path = optarg;
  59                         break;
  60                 case 'b':
  61                         opts->baud_rate = atoi(optarg);
  62                         break;
  63                 case 'v':
  64                         trace_level++;
  65                         pr_debug("Increased trace level to %d\n", trace_level);
  66                         break;
  67                 case 'q':
  68                         trace_level--;
  69                         pr_debug("Degreased trace level to %d\n", trace_level);
  70                         break;
  71                 case 'h':
  72                         print_help_and_die(argv[0]);
  73                         break;
  74                 case '?':
  75                         return -1;
  76                 }
  77         }
  78
  79         while (optind < argc) {
  80                 /* The rest of the options, ignored */
  81                 optind++;
  82         }
  83
  84         return 0;
  85 }