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/* vi: set sw=4 ts=4: */
/*
* Mini logname implementation for busybox
*
* Copyright (C) 2000 Edward Betts <edward@debian.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
*
*/
/* BB_AUDIT SUSv3 compliant */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/logname.html */
/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
*
* SUSv3 specifies the string used is that returned from getlogin().
* The previous implementation used getpwuid() for geteuid(), which
* is _not_ the same. Erik apparently made this change almost 3 years
* ago to avoid failing when no utmp was available. However, the
* correct course of action wrt SUSv3 for a failing getlogin() is
* a dianostic message and an error return.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "busybox.h"
extern int logname_main(int argc, char **argv)
{
const char *p;
if (argc > 1) {
bb_show_usage();
}
if ((p = getlogin()) != NULL) {
puts(p);
bb_fflush_stdout_and_exit(EXIT_SUCCESS);
}
bb_perror_msg_and_die("getlogin");
}
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