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/**
* cerberus-logging – Log-in logging extension for cerberus
*
* Copyright © 2014, 2015 Mattias Andrée (maandree@member.fsf.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 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 <lastlog.h>
#include <pwd.h>
int do_log(void)
{
struct passwd* pwd;
struct lastlog ll;
time_t t;
int fd;
if (!streq(action, "login"))
return 0;
if (pwd = getpwnam(username), pwd == NULL) return -1;
if (fd = open(_PATH_LASTLOG, O_RDWR, 0), fd < 0) return -1;
if (lseek(fd, (off_t)(pwd->pw_uid * sizeof(ll)), SEEK_SET) == -1) goto fail;
memset(&ll, 0, sizeof(ll));
time(&t), ll.ll_time = (typeof(ll.ll_time))t;
xstrcpy(ll.ll_line, ttyname);
xstrcpy(ll.ll_host, hostname);
if (write_all(fd, (char*)&ll, sizeof(ll)))
goto fail;
return close(fd), 0;
fail:
return close(fd), -1;
}
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