dabbad/help.c

   1 /**
   2  * \file help.c
   3  * \author written by Emmanuel Roullit emmanuel.roullit@gmail.com (c) 2013
   4  * \date 2013
   5  */
   6
   7
   8 #include <stdio.h>
   9 #include <assert.h>
  10 #include <getopt.h>
  11
  12 static const char _usage[] =
  13     "usage: dabbad [<args>]\n\n" "The available options are:\n";
  14
  15 /**
  16  * \brief Show dabbad usage options
  17  * \param[in]       opt         Pointer to option structure array
  18  */
  19
  20 void show_usage(const struct option *opt)
  21 {
  22         assert(opt);
  23
  24         printf("%s", _usage);
  25
  26         if (opt != NULL) {
  27                 while (opt->name != NULL) {
  28                         printf("  --%s", opt->name);
  29                         if (opt->has_arg == required_argument)
  30                                 printf(" <arg>\n");
  31                         else if (opt->has_arg == optional_argument)
  32                                 printf(" [arg]\n");
  33                         else
  34                                 printf("\n");
  35                         opt++;
  36                 }
  37         }
  38 }
  39
  40 /**
  41  * \brief Show current \c dabbad version on \c stdout
  42  * \return Always returns 0.
  43  */
  44
  45 int print_version(void)
  46 {
  47         printf("dabbad version %s\n", DABBA_VERSION);
  48         return 0;
  49 }