uclibc-ng/libc/unistd/getlogin.c

/* vi: set sw=4 ts=4: */
/* getlogin for uClibc
 *
 * Copyright (C) 2000 by Lineo, inc. and Erik Andersen
 * Copyright (C) 2000,2001 by Erik Andersen <andersen@uclibc.org>
 * Written by Erik Andersen <andersen@uclibc.org>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Library General Public License as published by
 * the Free Software Foundation; either version 2 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 Library General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#include <stdlib.h>
#include <string.h>

/* uClibc makes it policy to not mess with the utmp file whenever possible, *
 * since I consider utmp a complete wasts of time.  Since getlogin() should
 * never be used for security purposes, we kindly let the user specify whatever
 * they want via the LOGNAME environment variable, or we return NULL if
 * getenv() fails to find anything */

char * getlogin(void)
{
	return (getenv("LOGNAME"));
}

int getlogin_r(char *name, size_t len)
{
	char * foo = getenv("LOGNAME");

	if (! foo)
		return -1;

	strncpy(name, foo, len);
	return 0;
}