text: /* Test of getting user name.
     Copyright (C) 2010-2012 Free Software Foundation, Inc.
  
     This program 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.
  
     This program 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 Bruno Haible <bruno@clisp.org>, 2010.  */
  
  #include <config.h>
  
  #include <unistd.h>
  
  #include "signature.h"
  SIGNATURE_CHECK (getlogin, char *, (void));
  
  #include <errno.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  
  #include "macros.h"
  
  int
  main (void)
  {
    char *buf;
  
    /* Test value.  */
    buf = getlogin ();
    if (buf == NULL)
      {
        /* getlogin() fails when stdin is not connected to a tty.  */
        ASSERT (errno == ENOTTY
                || errno == EINVAL /* seen on Linux/SPARC */
               );
  #if !defined __hpux /* On HP-UX 11.11 it fails anyway.  */
        ASSERT (! isatty (0));
  #endif
        fprintf (stderr, "Skipping test: stdin is not a tty.\n");
        return 77;
      }
  
    /* Compare against the value from the environment.  */
  #if !((defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__)
    /* Unix platform */
    {
      const char *name = getenv ("LOGNAME");
      if (name == NULL || name[0] == '\0')
        name = getenv ("USER");
      if (name != NULL && name[0] != '\0')
        ASSERT (strcmp (buf, name) == 0);
    }
  #endif
  #if (defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__
    /* Native Windows platform.
       Note: This test would fail on Cygwin in an ssh session, because sshd
       sets USERNAME=SYSTEM.  */
    {
      const char *name = getenv ("USERNAME");
      if (name != NULL && name[0] != '\0')
        ASSERT (strcmp (buf, name) == 0);
    }
  #endif
  
    return 0;
  }
  