/* cleansess.c - Clean up the pty and frob utmp/wtmp accordingly after logout
  Copyright (C) 1996-2023 Free Software Foundation, Inc.

  This file is part of GNU Inetutils.

  GNU Inetutils 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 3 of the License, or (at
  your option) any later version.

  GNU Inetutils 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, see `http://www.gnu.org/licenses/'. */

/* Written by Miles Bader.  */

#include <config.h>

#include <unistd.h>
#include <sys/types.h>
#include <sys/time.h>
#include <time.h>
#ifdef HAVE_UTMP_H
# ifdef HAVE_UTIL_H
#  include <util.h>
# endif
# ifdef HAVE_LIBUTIL_H
#  include <libutil.h>
# endif
# include <utmp.h>
#else
# ifdef  HAVE_UTMPX_H
#  include <utmpx.h>
#  define utmp utmpx		/* make utmpx look more like utmp */
# endif
#endif
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>

#if defined HAVE_LOGOUT && HAVE_LOGWTMP

/* Update umtp & wtmp as necessary, and change tty & pty permissions back to
   what they should be.  */
void
cleanup_session (char *tty, int pty_fd)
{
  char *line;

# ifdef PATH_TTY_PFX
  if (strncmp (tty, PATH_TTY_PFX, sizeof PATH_TTY_PFX - 1) == 0)
    line = tty + sizeof PATH_TTY_PFX - 1;
  else
# endif/* PATH_TTY_PFX */
    line = tty;

  if (logout (line))
    logwtmp (line, "", "");

  chmod (tty, 0666);
  chown (tty, 0, 0);
  fchmod (pty_fd, 0666);
  fchown (pty_fd, 0, 0);
}
#endif /* HAVE_LOGOUT && HAVE_LOGWTMP */
