Function execute

src/tests/script.cpp:51–191

namespace tests {

void execute(const string& script)
{
  // Create a temporary directory for the test.
  Try<string> directory = environment->mkdtemp();

  CHECK_SOME(directory) << "Failed to create temporary directory";

  if (flags.verbose) {
    std::cerr << "Using temporary directory '"
              << directory.get() << "'" << std::endl;
  }

  // Determine the path for the script.
  Result<string> path = os::realpath(getTestScriptPath(script));

  if (!path.isSome()) {
    FAIL() << "Failed to locate script "
           << script << ": "
           << (path.isError() ? path.error() : "No such file or directory");
  }

  // Fork a process to change directory and run the test.
  pid_t pid;
  if ((pid = fork()) == -1) {
    FAIL() << "Failed to fork to launch script";
  }

  if (pid > 0) {
    // In parent process.
    int status;
    while (wait(&status) != pid || WIFSTOPPED(status));
    CHECK(WIFEXITED(status) || WIFSIGNALED(status))
      << "Unexpected wait status " << status;

    if (!WSUCCEEDED(status)) {
      FAIL() << script << " " << WSTRINGIFY(status);
    }
  } else {
    // In child process. DO NOT USE GLOG!

    // Start by cd'ing into the temporary directory.
    Try<Nothing> chdir = os::chdir(directory.get());
    if (chdir.isError()) {
      std::cerr << "Failed to chdir to '" << directory.get() << "': "
                << chdir.error() << std::endl;
      abort();
    }

    // Redirect output to /dev/null unless the test is verbose.
    if (!flags.verbose) {
      if (freopen(os::DEV_NULL, "w", stdout) == nullptr ||
          freopen(os::DEV_NULL, "w", stderr) == nullptr) {
        std::cerr << "Failed to redirect stdout/stderr to /dev/null:"
                  << os::strerror(errno) << std::endl;
        abort();
      }
    }