src/ja.c


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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "util/map.h"
#include "util/versie.h"

static void usage(FILE *f) {
  fprintf(f,
      "Gebruik: ja [-hV] [touwtje]\n"
      "\n"
      "Exporteer een touwtje oneindig lang.\n"
      "\n"
      "  -h    Toon deze hulptekst\n"
      "  -V    Toon versienummer\n");
}

// Returns pointer to argument array containing the file names
static char** parse_options(int argc, char **argv) {
  int opt;
  while ((opt = getopt(argc, argv, "hV")) != -1) {
    switch (opt) {
      case 'h':
        usage(stdout);
        exit(0);

      case 'V':
        drukkedoos_print_versie(stdout, "ja");
        exit(0);

      case '?':
        fprintf(stderr, "ja: Ongeldige optie: -%c\n", optopt);
        usage(stderr);
        exit(1);
    }
  }

  return argv + optind;
}

int entry_ja(int argc, char **argv) {
  char **args = parse_options(argc, argv);

  const char *touwtje = "ja";
  if (*args != NULL) {
    touwtje = *args;
  }

  for (;;) {
    puts(touwtje);
  }

  return 0;
}