sysdeps/mach/hurd/getlogin.c

   1 /* Copyright (C) 1991-2014 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <stddef.h>
  19 #include <errno.h>
  20 #include <unistd.h>
  21 #include <hurd.h>
  22
  23 /* Return the login name of the user, or NULL if it can't be determined.
  24    The returned pointer, if not NULL, is good only until the next call.  */
  25 char *
  26 getlogin (void)
  27 {
  28   static char login[1024];      /* XXX */
  29   error_t err;
  30
  31   if (err = __USEPORT (PROC, __proc_getlogin (port, login)))
  32     {
  33       errno = err;
  34       return NULL;
  35     }
  36
  37   return login;
  38 }