/* Copyright (C) 2010-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <pwd.h>

#include <unistd.h>

#include <not-cancel.h>

#define STATIC static

#define getlogin getlogin_fd0

#include <sysdeps/unix/getlogin.c>

#undef getlogin

/* Return the login name of the user, or NULL if it can't be determined.

   The returned pointer, if not NULL, is good only until the next call.  */

char *

getlogin (void)

{

  int res = __getlogin_r_loginuid (name, sizeof (name));

  if (res >= 0)

    return res == 0 ? name : NULL;

  return getlogin_fd0 ();

}