82 lines
2.6 KiB
C
82 lines
2.6 KiB
C
|
/*-
|
||
|
* Copyright (c) 2009 Ed Schouten <ed@FreeBSD.org>
|
||
|
* All rights reserved.
|
||
|
*
|
||
|
* Redistribution and use in source and binary forms, with or without
|
||
|
* modification, are permitted provided that the following conditions
|
||
|
* are met:
|
||
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
* notice, this list of conditions and the following disclaimer.
|
||
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
* documentation and/or other materials provided with the distribution.
|
||
|
*
|
||
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
* SUCH DAMAGE.
|
||
|
*/
|
||
|
|
||
|
#include <sys/cdefs.h>
|
||
|
__FBSDID("$FreeBSD$");
|
||
|
|
||
|
#include <pwd.h>
|
||
|
#include <unistd.h>
|
||
|
#include <stdlib.h>
|
||
|
#include <string.h>
|
||
|
#include <sysexits.h>
|
||
|
#include <ulog.h>
|
||
|
|
||
|
/*
|
||
|
* This setuid helper utility writes user login records to disk.
|
||
|
* Unprivileged processes are not capable of writing records to utmp,
|
||
|
* wtmp and lastlog, but we do want to allow this for pseudo-terminals.
|
||
|
* Because a file descriptor to a pseudo-terminal master device can only
|
||
|
* be obtained by processes using the pseudo-terminal, we expect such a
|
||
|
* descriptor on stdin.
|
||
|
*
|
||
|
* It uses the real user ID of the calling process to determine the
|
||
|
* username. It does allow users to log arbitrary hostnames.
|
||
|
*/
|
||
|
|
||
|
int
|
||
|
main(int argc, char *argv[])
|
||
|
{
|
||
|
const char *line;
|
||
|
|
||
|
/* Device line name. */
|
||
|
if ((line = ptsname(STDIN_FILENO)) == NULL)
|
||
|
return (EX_USAGE);
|
||
|
|
||
|
if ((argc == 2 || argc == 3) && strcmp(argv[1], "login") == 0) {
|
||
|
struct passwd *pwd;
|
||
|
const char *host = NULL;
|
||
|
|
||
|
/* Username. */
|
||
|
pwd = getpwuid(getuid());
|
||
|
if (pwd == NULL)
|
||
|
return (EX_OSERR);
|
||
|
|
||
|
/* Hostname. */
|
||
|
if (argc == 3)
|
||
|
host = argv[2];
|
||
|
|
||
|
if (ulog_login(line, pwd->pw_name, host) != 0)
|
||
|
return (EX_OSFILE);
|
||
|
return (EX_OK);
|
||
|
} else if (argc == 2 && strcmp(argv[1], "logout") == 0) {
|
||
|
if (ulog_logout(line) != 0)
|
||
|
return (EX_OSFILE);
|
||
|
return (EX_OK);
|
||
|
}
|
||
|
|
||
|
return (EX_USAGE);
|
||
|
}
|