/*
Find out login name for vlock, the VT locking program for linux.
Copyright (C) 2002 Dmitry V. Levin <ldv@altlinux.org>
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 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 General Public License for more details.
You should have received a copy of the GNU 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 "config.h"
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <pwd.h>
#include "vlock.h"
#include "nls.h"
#include "kbd_error.h"
/*
* Try to find out proper login name.
*/
const char *
get_username(void)
{
const char *name;
struct passwd *pw = 0;
uid_t uid = getuid();
char *logname = getenv("LOGNAME");
if (logname) {
pw = getpwnam(logname);
/* Ensure uid is same as current. */
if (pw && pw->pw_uid != uid)
pw = 0;
}
if (!pw)
pw = getpwuid(uid);
if (!pw)
kbd_error(EXIT_FAILURE, 0, _("unrecognized user"));
name = strdup(pw->pw_name);
if (!name)
kbd_error(EXIT_FAILURE, errno, "strdup");
endpwent();
return name;
}