source: trunk/third/openssh/sshlogin.c @ 22570

Revision 22570, 4.6 KB checked in by ghudson, 18 years ago (diff)
This commit was generated by cvs2svn to compensate for changes in r22569, which included commits to RCS files with non-trunk default branches.
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1/*
2 * Author: Tatu Ylonen <ylo@cs.hut.fi>
3 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4 *                    All rights reserved
5 * This file performs some of the things login(1) normally does.  We cannot
6 * easily use something like login -p -h host -f user, because there are
7 * several different logins around, and it is hard to determined what kind of
8 * login the current system has.  Also, we want to be able to execute commands
9 * on a tty.
10 *
11 * As far as I am concerned, the code I have written for this software
12 * can be used freely for any purpose.  Any derived versions of this
13 * software must be clearly marked as such, and if the derived work is
14 * incompatible with the protocol description in the RFC file, it must be
15 * called by a name other than "ssh" or "Secure Shell".
16 *
17 * Copyright (c) 1999 Theo de Raadt.  All rights reserved.
18 * Copyright (c) 1999 Markus Friedl.  All rights reserved.
19 *
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted provided that the following conditions
22 * are met:
23 * 1. Redistributions of source code must retain the above copyright
24 *    notice, this list of conditions and the following disclaimer.
25 * 2. Redistributions in binary form must reproduce the above copyright
26 *    notice, this list of conditions and the following disclaimer in the
27 *    documentation and/or other materials provided with the distribution.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
30 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
31 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
32 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
33 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
34 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
38 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 */
40
41#include "includes.h"
42RCSID("$OpenBSD: sshlogin.c,v 1.13 2004/08/12 09:18:24 djm Exp $");
43
44#include "loginrec.h"
45#include "log.h"
46#include "buffer.h"
47#include "servconf.h"
48
49extern Buffer loginmsg;
50extern ServerOptions options;
51
52/*
53 * Returns the time when the user last logged in.  Returns 0 if the
54 * information is not available.  This must be called before record_login.
55 * The host the user logged in from will be returned in buf.
56 */
57u_long
58get_last_login_time(uid_t uid, const char *logname,
59    char *buf, u_int bufsize)
60{
61        struct logininfo li;
62
63        login_get_lastlog(&li, uid);
64        strlcpy(buf, li.hostname, bufsize);
65        return li.tv_sec;
66}
67
68/*
69 * Generate and store last login message.  This must be done before
70 * login_login() is called and lastlog is updated.
71 */
72static void
73store_lastlog_message(const char *user, uid_t uid)
74{
75        char *time_string, hostname[MAXHOSTNAMELEN] = "", buf[512];
76        time_t last_login_time;
77
78#ifndef NO_SSH_LASTLOG
79        if (!options.print_lastlog)
80                return;
81
82        last_login_time = get_last_login_time(uid, user, hostname,
83            sizeof(hostname));
84
85        if (last_login_time != 0) {
86                time_string = ctime(&last_login_time);
87                if (strchr(time_string, '\n'))
88                    *strchr(time_string, '\n') = '\0';
89                if (strcmp(hostname, "") == 0)
90                        snprintf(buf, sizeof(buf), "Last login: %s\r\n",
91                            time_string);
92                else
93                        snprintf(buf, sizeof(buf), "Last login: %s from %s\r\n",
94                            time_string, hostname);
95                buffer_append(&loginmsg, buf, strlen(buf));
96        }
97#endif /* NO_SSH_LASTLOG */
98}
99
100/*
101 * Records that the user has logged in.  I wish these parts of operating
102 * systems were more standardized.
103 */
104void
105record_login(pid_t pid, const char *tty, const char *user, uid_t uid,
106    const char *host, struct sockaddr * addr, socklen_t addrlen)
107{
108        struct logininfo *li;
109
110        /* save previous login details before writing new */
111        store_lastlog_message(user, uid);
112
113        li = login_alloc_entry(pid, user, host, tty);
114        login_set_addr(li, addr, addrlen);
115        login_login(li);
116        login_free_entry(li);
117}
118
119#ifdef LOGIN_NEEDS_UTMPX
120void
121record_utmp_only(pid_t pid, const char *ttyname, const char *user,
122                 const char *host, struct sockaddr * addr, socklen_t addrlen)
123{
124        struct logininfo *li;
125
126        li = login_alloc_entry(pid, user, host, ttyname);
127        login_set_addr(li, addr, addrlen);
128        login_utmp_only(li);
129        login_free_entry(li);
130}
131#endif
132
133/* Records that the user has logged out. */
134void
135record_logout(pid_t pid, const char *tty, const char *user)
136{
137        struct logininfo *li;
138
139        li = login_alloc_entry(pid, user, NULL, tty);
140        login_logout(li);
141        login_free_entry(li);
142}
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