sysdeps/unix/sysv/linux/getlogin.c

   1 /* Copyright (C) 2010 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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <pwd.h>
  20 #include <unistd.h>
  21 #include <not-cancel.h>
  22
  23 #define STATIC static
  24 #define getlogin getlogin_fd0
  25 #include <sysdeps/unix/getlogin.c>
  26 #undef getlogin
  27
  28
  29 /* Return the login name of the user, or NULL if it can't be determined.
  30    The returned pointer, if not NULL, is good only until the next call.  */
  31
  32 char *
  33 getlogin (void)
  34 {
  35   if (__getlogin_r_loginuid (name, sizeof (name)) == 0)
  36     return name;
  37
  38   return getlogin_fd0 ();
  39 }