lib/getlogin.c

   1 /* Provide a working getlogin for systems which lack it.
   2
   3    Copyright (C) 2010-2018 Free Software Foundation, Inc.
   4
   5    This program is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  17
  18 /* Written by Bruno Haible, 2010.  */
  19
  20 #include <config.h>
  21
  22 /* Specification.  */
  23 #include <unistd.h>
  24
  25 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
  26 # define WIN32_LEAN_AND_MEAN
  27 # include <windows.h>
  28 #endif
  29
  30 char *
  31 getlogin (void)
  32 {
  33 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
  34   static char login_name[1024];
  35   DWORD sz = sizeof (login_name);
  36
  37   if (GetUserName (login_name, &sz))
  38     return login_name;
  39 #endif
  40   return NULL;
  41 }