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int main(int argc, char *argv[]) {

  if (argc < 2)
    return EXIT_SUCCESS;

  const char* const c_str = argv[1];
  char *end;
  int si;

  errno = 0;

  const long sl = strtol(c_str, &end, 10);

  if (end == c_str) {
    fprintf(stderr, "%s: not a decimal number\n", c_str);
  }
  else if ('\0' != *end) {
    fprintf(stderr, "%s: extra characters at end of input: %s\n", c_str, end);
  }
  else if ((LONG_MIN == sl || LONG_MAX == sl) && ERANGE == errno) {
    fprintf(stderr, "%s out of range of type long\n", c_str);
  }
  else if (sl > INT_MAX) {
    fprintf(stderr, "%ld greater than INT_MAX\n", sl);
  }
  else if (sl < INT_MIN) {
     fprintf(stderr, "%ld less than INT_MIN\n", sl);
  }
  else {
    si = (int)sl;

    /* processProcess si */

    return EXIT_SUCCESS;
  }
  return EXIT_FAILURE;
}