nologin.c revision 126512 
1/*-
2 * This program is in the public domain.  I couldn't bring myself to
3 * declare Copyright on a variant of Hello World.
4 */
5
6#include <sys/cdefs.h>
7__FBSDID("$FreeBSD: head/usr.sbin/nologin/nologin.c 126117 2004-02-22 10:03:24Z cperciva $");
8
9#include <sys/types.h>
10#include <sys/uio.h>
11#include <syslog.h>
12#include <unistd.h>
13
14#define	MESSAGE	"This account is currently not available.\n"
15
16int
17main(int argc, char *argv[])
18{
19#ifndef NO_NOLOGIN_LOG
20	char *user, *tt;
21
22	if ((tt = ttyname(0)) == NULL)
23		tt = "UNKNOWN";
24	if ((user = getlogin()) == NULL)
25		user = "UNKNOWN";
26
27	openlog("nologin", LOG_CONS, LOG_AUTH);
28	syslog(LOG_CRIT, "Attempted login by %s on %s", user, tt);
29	closelog();
30#endif /* NO_NOLOGIN_LOG */
31
32	write(STDOUT_FILENO, MESSAGE, sizeof(MESSAGE) - 1);
33	_exit(1);
34}
35