/* virt-hostinfo
 * Copyright (C) 2009 Red Hat Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/inotify.h>
#include <sys/stat.h>

#include <apr_general.h>

#include "hostinfod.h"

int sockets_inotify_fd = -1;

void
monitor_socket_dir (void)
{
  struct stat statbuf;

  if (!socket_dir) {
    error ("no socket directory was configured - see hostinfo(8)");
    exit (1);
  }

  if (stat (socket_dir, &statbuf) == -1) {
    perrorf ("%s (socket directory): does not exist or is not accessible",
	     socket_dir);
    exit (1);
  }
  if (!S_ISDIR (statbuf.st_mode)) {
    error ("%s (socket directory): not a directory", socket_dir);
    exit (1);
  }

  debug ("creating inotify watch on '%s'", socket_dir);

#ifdef HAVE_INOTIFY_INIT1
  sockets_inotify_fd = inotify_init1 (IN_NONBLOCK | IN_CLOEXEC);
  if (sockets_inotify_fd == -1) {
    perrorf ("inotify_init1");
    exit (1);
  }
#else
  sockets_inotify_fd = inotify_init ();
  if (sockets_inotify_fd == -1) {
    perrorf ("inotify_init");
    exit (1);
  }
  if (fcntl (sockets_inotify_fd, F_SETFL, O_NONBLOCK) == -1) {
    perrorf ("fcntl: O_NONBLOCK");
    exit (1);
  }
  if (fcntl (sockets_inotify_fd, F_SETFD, FD_CLOEXEC) == -1) {
    perrorf ("fcntl: FD_CLOEXEC");
    exit (1);
  }
#endif

  if (inotify_add_watch (sockets_inotify_fd, socket_dir,
			 IN_CREATE|IN_DELETE|IN_MOVE) == -1) {
    perrorf ("inotify_add_watch: %s", socket_dir);
    exit (1);
  }

  debug ("inotify of %s successful, fd = %d",
	 socket_dir, sockets_inotify_fd);
}