First try

pkmn.c

@@ -0,0 +1,132 @@
+#include <stdlib.h>
+#include <argp.h>
+
+const char *argp_program_version =
+  "pkmn 1.0";
+const char *argp_program_bug_address =
+  "<gauvain.thomas@gmail.com>";
+
+/* Program documentation. */
+static char doc[] =
+  "Argp example #3 -- a program with options and arguments using argp";
+
+/* A description of the arguments we accept. */
+static char args_doc[] = "pokemon_name";
+
+/* The options we understand. */
+static struct argp_option options[] = {
+  {"random",   'r', 0,      0,  "Use a random pokemon"},
+  {"shiney",   'S', 0,      0,  "Use a shiney pokemon"},
+  {"verbose",  'v', 0,      0,  "Produce verbose output" },
+  {"quiet",    'q', 0,      0,  "Don't produce any output" },
+  {"silent",   's', 0,      OPTION_ALIAS },
+  { 0 }
+};
+
+/* Used by main to communicate with parse_opt. */
+struct arguments
+{
+  char *args[1];                /* arg*/
+  int silent, verbose;
+  int random, shiney;          /* random and shiney flags */ 
+};
+
+/* Parse a single option. */
+static error_t
+parse_opt (int key, char *arg, struct argp_state *state)
+{
+  /* Get the input argument from argp_parse, which we
+     know is a pointer to our arguments structure. */
+  struct arguments *arguments = state->input;
+
+  switch (key)
+    {
+    case 'q': case 's':
+      arguments->silent = 1;
+      break;
+    case 'v':
+      arguments->verbose = 1;
+      break;
+    case 'r':
+      printf("Random pokemon\n");
+      arguments->random = 1;
+      break;
+    case 'S':
+      printf("Shiney pokemon\n");
+      arguments->shiney = 1;
+      break;
+
+    case ARGP_KEY_ARG:
+      if (state->arg_num >= 1)
+        /* Too many arguments. */
+        argp_usage (state);
+
+      arguments->args[state->arg_num] = arg;
+
+      break;
+
+    case ARGP_KEY_END:
+      if (state->arg_num < 0)
+        /* Not enough arguments. */
+        argp_usage (state);
+      break;
+
+    default:
+      return ARGP_ERR_UNKNOWN;
+    }
+  return 0;
+}
+
+/* Our argp parser. */
+static struct argp argp = { options, parse_opt, args_doc, doc };
+
+int main (int argc, char **argv) {
+  struct arguments arguments;
+  char pkmn_path[] = "~/pokemons/";
+
+  /* Default values. */
+  arguments.silent = 0;
+  arguments.verbose = 0;
+  arguments.random = 0;
+  arguments.shiney = 0;
+
+  /* Parse our arguments; every option seen by parse_opt will
+      be reflected in arguments. */
+  argp_parse (&argp, argc, argv, 0, 0, &arguments);
+
+  if (arguments.verbose) {
+    printf("ARG1 = %s\n", arguments.args[0]);
+    printf("VERBOSE = %s\n", arguments.verbose ? "yes" : "no");
+    printf("SILENT = %s\n", arguments.silent ? "yes" : "no");
+    printf("RANDOM = %s\n", arguments.random ? "yes" : "no");
+    printf("SHINEY = %s\n", arguments.shiney ? "yes" : "no");
+  }
+
+  // If random flag is set, roll a random pokemon
+  // Pokemons are located in ~/pokemons/
+  char pokemon[512];
+  if (arguments.random) {
+    system("ls ~/pokemons/yes | shuf -n 1 > /tmp/pkmn");
+    FILE *f = fopen("/tmp/pkmn", "r");
+    fscanf(f, "%s", pokemon);
+    fclose(f);
+    printf("Random pokemon: %s\n", pokemon);
+  }
+
+  // Then we can use the pokemon name to display it
+  // echo "$pokemon_name!" | cowsay -f "$cow_file" -W 70
+  char command[512];
+  if (arguments.random) {
+    sprintf(command, "echo \"%s!\" | cowsay -f ~/pokemons/yes/%s -W 70", pokemon, pokemon);
+  } else {
+    sprintf(command, "echo \"%s!\" | cowsay -f %s -W 70", arguments.args[0], "pikachu");
+  }
+
+  printf("Command: %s\n", command);
+
+  if (!arguments.silent) {
+    system(command);
+  }
+
+  exit(0);
+}