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/**
 * cerberus-logging – Log-in logging extension for cerberus
 * 
 * Copyright © 2014, 2015  Mattias Andrée (m@maandree.se)
 * 
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */
#include "common.h"
#include <syslog.h>
#include <pwd.h>


int
do_log(void)
{
	static char empty[] = "";
	struct passwd *pwd;
	const char *prefix;
	const char *affix;
	int status;

	if (!streq(action, "failed") && !streq(action, "login"))
		return 0;

	status = streq(action, "login");

	pwd = getpwnam(username);
	if (!pwd)
		return -1;

	openlog("log-login-syslog", LOG_ODELAY, LOG_AUTHPRIV);

	if (status) {
		if (strstr(ttyname, "ttyS") == ttyname)
			syslog(LOG_INFO, "DIALUP AT %s BY %s", ttyname, username);

		prefix = pwd->pw_uid ? "" : "ROOT ";
		affix = hostname ? " FROM " : "";
		hostname = hostname ? hostname : empty;

		syslog(pwd->pw_uid ? LOG_INFO : LOG_NOTICE, "%sLOGIN ON %s BY %s%s%s",
		       prefix, ttyname, username, affix, hostname);
	} else {
		affix = hostname ? " FROM " : "";

		syslog(LOG_NOTICE, "FAILED LOGIN SESSION%s%s FOR %s ON %s",
		       affix, hostname, username, ttyname);
	}

	closelog();
	return 0;
}