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 "config.h"
   7 #include "trace.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("  -c, --config=PATH       config file path\n");
  19         pr_info("  -h, --help              show this help\n");
  20
  21         exit(0);
  22 }
  23
  24 static void set_default_options(struct plotter_config *opts)
  25 {
  26         bzero(opts, sizeof(*opts));
  27
  28         opts->baudrate = 128000;
  29         opts->device_path = "/dev/ttyUSB0";
  30 }
  31
  32 int read_args(int argc, char *argv[], struct plotter_config *opts)
  33 {
  34         int option_index = 0, c;
  35         static struct option long_options[] = {
  36                 { .val = 'd', .name = "device", .has_arg = 1, },
  37                 { .val = 'o', .name = "output", .has_arg = 1 },
  38                 { .val = 'b', .name = "baud", .has_arg = 1 },
  39                 { .val = 'v', .name = "verbose", .has_arg = 2 },
  40                 { .val = 'q', .name = "quiet", },
  41                 { .val = 'c', .name = "config", .has_arg = 1 },
  42                 { .val = 'h', .name = "help", },
  43         };
  44         char short_options[] = "d:o:b:vqc:h";
  45
  46         set_default_options(opts);
  47
  48         while (1) {
  49                 c = getopt_long(argc, argv, short_options, long_options,
  50                                 &option_index);
  51
  52                 if (c == -1)
  53                         break;
  54
  55                 switch (c) {
  56                 case 'd':
  57                         opts->device_path = optarg;
  58                         break;
  59                 case 'o':
  60                         opts->log_path = optarg;
  61                         break;
  62                 case 'b':
  63                         opts->baudrate = atoi(optarg);
  64                         break;
  65                 case 'v':
  66                         trace_level++;
  67                         pr_debug("Increased trace level to %d\n", trace_level);
  68                         break;
  69                 case 'q':
  70                         trace_level--;
  71                         pr_debug("Degreased trace level to %d\n", trace_level);
  72                         break;
  73                 case 'c':
  74                         opts->config_file_path = optarg;
  75                         break;
  76                 case 'h':
  77                         print_help_and_die(argv[0]);
  78                         break;
  79                 case '?':
  80                         return -1;
  81                 }
  82         }
  83
  84         while (optind < argc) {
  85                 /* The rest of the options, ignored */
  86                 optind++;
  87         }
  88
  89         return 0;
  90 }