logwtmp.c revision 133936 
1/*	$NetBSD: logwtmp.c,v 1.22 2004-08-09 12:56:48 lukem Exp $	*/
2
3/*
4 * Copyright (c) 1988, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 */
32
33
34#include <sys/cdefs.h>
35#ifndef lint
36#if 0
37static char sccsid[] = "@(#)logwtmp.c	8.1 (Berkeley) 6/4/93";
38#else
39__RCSID("$NetBSD: logwtmp.c,v 1.22 2004-08-09 12:56:48 lukem Exp $");
40#endif
41#endif /* not lint */
42
43#include <sys/types.h>
44#include <sys/param.h>
45#include <sys/time.h>
46#include <sys/stat.h>
47#include <sys/wait.h>
48
49#include <fcntl.h>
50#include <signal.h>
51#include <stdio.h>
52#include <string.h>
53#include <time.h>
54#include <unistd.h>
55#include <utmp.h>
56#ifdef SUPPORT_UTMPX
57#include <utmpx.h>
58#endif
59#include <util.h>
60
61#ifdef KERBEROS5
62#include <krb5/krb5.h>
63#endif
64
65#include "extern.h"
66
67static int fd = -1;
68#ifdef SUPPORT_UTMPX
69static int fdx = -1;
70#endif
71
72/*
73 * Modified version of logwtmp that holds wtmp file open
74 * after first call, for use with ftp (which may chroot
75 * after login, but before logout).
76 */
77void
78ftpd_logwtmp(const char *line, const char *name, const char *host)
79{
80	struct utmp ut;
81	struct stat buf;
82
83	if (fd < 0 && (fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) < 0)
84		return;
85	if (fstat(fd, &buf) == 0) {
86		(void)strncpy(ut.ut_line, line, sizeof(ut.ut_line));
87		(void)strncpy(ut.ut_name, name, sizeof(ut.ut_name));
88		(void)strncpy(ut.ut_host, host, sizeof(ut.ut_host));
89		(void)time(&ut.ut_time);
90		if (write(fd, (char *)&ut, sizeof(struct utmp)) !=
91		    sizeof(struct utmp))
92			(void)ftruncate(fd, buf.st_size);
93	}
94}
95
96#ifdef SUPPORT_UTMPX
97void
98ftpd_logwtmpx(const char *line, const char *name, const char *host, int status, int utx_type)
99{
100	struct utmpx ut;
101	struct stat buf;
102
103	if (fdx < 0 && (fdx = open(_PATH_WTMPX, O_WRONLY|O_APPEND, 0)) < 0)
104		return;
105	if (fstat(fdx, &buf) == 0) {
106		(void)strncpy(ut.ut_line, line, sizeof(ut.ut_line));
107		(void)strncpy(ut.ut_name, name, sizeof(ut.ut_name));
108		(void)strncpy(ut.ut_host, host, sizeof(ut.ut_host));
109		ut.ut_type = utx_type;
110		if (WIFEXITED(status))
111			ut.ut_exit.e_exit = (uint16_t)WEXITSTATUS(status);
112		if (WIFSIGNALED(status))
113		ut.ut_exit.e_termination = (uint16_t)WTERMSIG(status);
114		(void)gettimeofday(&ut.ut_tv, NULL);
115		if(write(fdx, (char *)&ut, sizeof(struct utmpx)) !=
116		    sizeof(struct utmpx))
117			(void)ftruncate(fdx, buf.st_size);
118	}
119}
120#endif
121