rm_/lib/getlogin.c

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/* Provide a working getlogin for systems which lack it.
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Copyright (C) 2010-2022 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
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This file is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible, 2010. */
#include <config.h>
/* Specification. */
#include <unistd.h>
#if defined _WIN32 && ! defined __CYGWIN__
# define WIN32_LEAN_AND_MEAN
# include <windows.h>
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/* Don't assume that UNICODE is not defined. */
# undef GetUserName
# define GetUserName GetUserNameA
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#endif
char *
getlogin (void)
{
#if defined _WIN32 && ! defined __CYGWIN__
static char login_name[1024];
DWORD sz = sizeof (login_name);
if (GetUserName (login_name, &sz))
return login_name;
#endif
return NULL;
}