xref: /freebsd/usr.sbin/nologin/nologin.c (revision 069ac184)
1 /*-
2  * Copyright (c) 2004 The FreeBSD Project.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  */
26 
27 #include <sys/cdefs.h>
28 #include <stdio.h>
29 #include <syslog.h>
30 #include <unistd.h>
31 
32 #define	MESSAGE	"This account is currently not available.\n"
33 
34 int
35 main(__unused int argc, __unused char *argv[])
36 {
37 	const char *user, *tt;
38 
39 	if ((tt = ttyname(0)) == NULL)
40 		tt = "UNKNOWN";
41 	if ((user = getlogin()) == NULL)
42 		user = "UNKNOWN";
43 	openlog("nologin", LOG_CONS, LOG_AUTH);
44 	syslog(LOG_CRIT, "Attempted login by %s on %s", user, tt);
45 	closelog();
46 
47 	printf("%s", MESSAGE);
48 	return 1;
49 }
50