add helptext

src/realm/exec/realm_trawler.cpp

@@ -1093,14 +1093,13 @@ int main(int argc, const char* argv[])
  const char* key_ptr = nullptr;
  char key[64];
  for (int curr_arg = 1; curr_arg < argc; curr_arg++) {
- if (strcmp(argv[curr_arg], "--key") == 0) {
+ if (strcmp(argv[curr_arg], "--keyfile") == 0) {
  std::ifstream key_file(argv[curr_arg + 1]);
  key_file.read(key, sizeof(key));
  key_ptr = key;
  curr_arg++;
  }
  else if (strcmp(argv[curr_arg], "--hexkey") == 0) {
- std::ifstream key_file(argv[curr_arg + 1]);
  curr_arg++;
  const char* chars = argv[curr_arg];
  for (int idx = 0; idx < 64; ++idx) {
@@ -1165,7 +1164,10 @@ int main(int argc, const char* argv[])
  }
  }
  else {
- std::cout << "Usage: realm-trawler [-afmsw] [--key crypt_key] [--top top_ref] <realmfile>" << std::endl;
+ std::cout << "Usage: realm-trawler [-afmsw] [--keyfile file-with-binary-crypt-key] [--hexkey "
+ "crypt-key-in-hex] [--top "
+ "top_ref] <realmfile>"
+ << std::endl;
  std::cout << " f : free list analysis" << std::endl;
  std::cout << " m : memory leak check" << std::endl;
  std::cout << " s : schema dump" << std::endl;