void run_callback_internal()

in scripts/inotify/inotify.c [24:64]

• 36 lines of code
• 11 McCabe index (conditional complexity)

void run_callback_internal(char** callback) {
  fflush(stdout);  // avoid mixing with callback output.

  pid_t pid = fork();
  if (pid == -1) {
    perror("fork");
    return;  // let it retry at the next event or timeout.
  }

  if (pid == 0) {
    execve(callback[0], callback, environ);
    perror("execve");
    exit(EXIT_FAILURE);
  }

  int status;
  do {
    int w = waitpid(pid, &status, 0);
    if (w == -1) {
      if (errno == EINTR) {
        continue;
      }
      perror("waitpid");
      exit(EXIT_FAILURE);  // shouldn't happen; don't risk leaking zombies.
    }
  } while (!WIFEXITED(status) && !WIFSIGNALED(status));

  if (WIFEXITED(status)) {
    printf("inotify: %s exited with status %d (exit: %d)\n",
           callback[0], status, WEXITSTATUS(status));
  } else if (WIFSIGNALED(status)) {
    printf("inotify: %s exited with status %d (signal: %d)\n",
           callback[0], status, WTERMSIG(status));
  } else {
    printf("inotify: %s exited with status %d\n", callback[0], status);
  }

  if (WIFEXITED(status) && WEXITSTATUS(status) == EXIT_SUCCESS) {
    exit(EXIT_SUCCESS);
  }
}