blob: 0456c5796a289654d96ac70b0e075684c42aa6cd [file] [log] [blame]
/* Implementation of the GETLOG g77 intrinsic.
Copyright (C) 2005, 2007, 2009 Free Software Foundation, Inc.
Contributed by Fran├žois-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 3 of the License, or (at your option) any later version.
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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#include "libgfortran.h"
#include <string.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_PWD_H
#include <pwd.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 */
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. */
#if defined(HAVE_GETPWUID) && defined(HAVE_GETEUID)
{
struct passwd *pw = getpwuid (geteuid ());
if (pw)
p = pw->pw_name;
else
return;
}
#else
# ifdef HAVE_GETLOGIN
p = getlogin();
# else
return;
# endif
#endif
if (p == NULL)
return;
p_len = strlen (p);
if (login_len < p_len)
memcpy (login, p, login_len);
else
memcpy (login, p, p_len);
}