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/* Implementation of the GETLOG g77 intrinsic.

   Copyright (C) 2005 Free Software Foundation, Inc.

   Contributed by François-Xavier Coudert <coudert@clipper.ens.fr>

This file is part of the GNU Fortran 95 runtime library (libgfortran).

Libgfortran 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 2 of the License, or (at your option) any later version.

In addition to the permissions in the GNU General Public License, the

Free Software Foundation gives you unlimited permission to link the

compiled version of this file into combinations with other programs,

and to distribute those combinations without any restriction coming

from the use of this file.  (The General Public License restrictions

do apply in other respects; for example, they cover modification of

the file, and distribution when not linked into a combine

executable.)

Libgfortran 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 libgfortran; see the file COPYING.  If not,

write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

Boston, MA 02110-1301, USA.  */

#include "config.h"

#include "libgfortran.h"

#ifdef HAVE_STRING_H

#include <string.h>

#endif

#ifdef HAVE_UNISTD_H

#include <unistd.h>

#endif

/* Windows32 version */

#if defined __MINGW32__ && !defined  HAVE_GETLOGIN

#define WIN32_LEAN_AND_MEAN

#include <windows.h>

#include <lmcons.h>  /* for UNLEN */ 

static char *

w32_getlogin (void)

{

  static char name [UNLEN + 1];

  DWORD namelen = sizeof (name);

  GetUserName (name, &namelen);

  return (name[0] == 0 ?  NULL : name);

}

#undef getlogin

#define getlogin w32_getlogin

#define HAVE_GETLOGIN 1

#endif

/* GETLOG (LOGIN), g77 intrinsic for retrieving the login name for the

   process.

   CHARACTER(len=*), INTENT(OUT) :: LOGIN  */

#ifdef HAVE_GETLOGIN

void PREFIX(getlog) (char *, gfc_charlen_type);

export_proto_np(PREFIX(getlog));

void

PREFIX(getlog) (char * login, gfc_charlen_type login_len)

{

  int p_len;

  char *p;

  memset (login, ' ', login_len); /* Blank the string.  */

  p = getlogin ();

  if (p == NULL)

    return;

  p_len = strlen (p);

  if (login_len < p_len)

    memcpy (login, p, login_len);

  else

    memcpy (login, p, p_len);

}

#endif