Redirect stderr to ncurses window

[Jeff Barnes]

I've seen posts and blogs advising against this, but I need to grab debug 
output from a library and print it to an ncurses window. I've tried code like 
the following, but it doesn't work and corrupts the terminal window. What do I 
have to do to grab the library stderr output and wprintw it to a WINDOW?

I'm locking down all ncurses function calls with the same mutex.

Am I "barking up the wrong tree?"

Thanks for any help.

void
stderr_thread_func(void *data) {
  int outp[2], old, len;
  char buf[1024] = {0};
  old = dup(stderr);
  if (pipe(outp) != 0) {
    g_mutex_lock(curses_mutex);
    wprintw(console.msgw, "Pipe failed\n");
    wrefresh(console.msgw);
    g_mutex_unlock(curses_mutex);
    return;
  }
  dup2(outp[1], stderr);
  close(outp[1]);
  while(isRunning && read(outp[0], buf, sizeof(buf)-2)) {
    len = strlen(buf);
    buf[len+1] = '\n';
    g_mutex_lock(curses_mutex);
    wprintw(console.msgw, buf);
    wrefresh(console.msgw);
    g_mutex_unlock(curses_mutex);
    memset(buf, 0, strlen(buf)+1);
  }
}