blob: cccaa47ae35de9f35450bbe7d580b89ba9cb45a0 [file] [log] [blame]
andre2ff7b5d2000-06-03 14:57:40 +00001/*
2 * Copyright (c) 2000 Andre Lucas. All rights reserved.
andre61e67252000-06-04 17:07:49 +00003 * Portions copyright (c) 1998 Todd C. Miller
4 * Portions copyright (c) 1996 Jason Downs
5 * Portions copyright (c) 1996 Theo de Raadt
andre2ff7b5d2000-06-03 14:57:40 +00006 *
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.
andre2ff7b5d2000-06-03 14:57:40 +000015 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
Darren Tucker2fba9932005-02-02 23:30:24 +110028/*
29 * The btmp logging code is derived from login.c from util-linux and is under
30 * the the following license:
31 *
32 * Copyright (c) 1980, 1987, 1988 The Regents of the University of California.
33 * All rights reserved.
34 *
35 * Redistribution and use in source and binary forms are permitted
36 * provided that the above copyright notice and this paragraph are
37 * duplicated in all such forms and that any documentation,
38 * advertising materials, and other materials related to such
39 * distribution and use acknowledge that the software was developed
40 * by the University of California, Berkeley. The name of the
41 * University may not be used to endorse or promote products derived
42 * from this software without specific prior written permission.
43 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
44 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
45 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
46 */
47
48
Kevin Stevesef4eea92001-02-05 12:42:17 +000049/**
andre2ff7b5d2000-06-03 14:57:40 +000050 ** loginrec.c: platform-independent login recording and lastlog retrieval
51 **/
52
andre61e67252000-06-04 17:07:49 +000053/*
Damien Miller8899ed32004-09-12 15:18:55 +100054 * The new login code explained
55 * ============================
56 *
57 * This code attempts to provide a common interface to login recording
58 * (utmp and friends) and last login time retrieval.
59 *
60 * Its primary means of achieving this is to use 'struct logininfo', a
61 * union of all the useful fields in the various different types of
62 * system login record structures one finds on UNIX variants.
63 *
64 * We depend on autoconf to define which recording methods are to be
65 * used, and which fields are contained in the relevant data structures
66 * on the local system. Many C preprocessor symbols affect which code
67 * gets compiled here.
68 *
69 * The code is designed to make it easy to modify a particular
70 * recording method, without affecting other methods nor requiring so
71 * many nested conditional compilation blocks as were commonplace in
72 * the old code.
73 *
74 * For login recording, we try to use the local system's libraries as
75 * these are clearly most likely to work correctly. For utmp systems
76 * this usually means login() and logout() or setutent() etc., probably
77 * in libutil, along with logwtmp() etc. On these systems, we fall back
78 * to writing the files directly if we have to, though this method
79 * requires very thorough testing so we do not corrupt local auditing
80 * information. These files and their access methods are very system
81 * specific indeed.
82 *
83 * For utmpx systems, the corresponding library functions are
84 * setutxent() etc. To the author's knowledge, all utmpx systems have
85 * these library functions and so no direct write is attempted. If such
86 * a system exists and needs support, direct analogues of the [uw]tmp
87 * code should suffice.
88 *
89 * Retrieving the time of last login ('lastlog') is in some ways even
90 * more problemmatic than login recording. Some systems provide a
91 * simple table of all users which we seek based on uid and retrieve a
92 * relatively standard structure. Others record the same information in
93 * a directory with a separate file, and others don't record the
94 * information separately at all. For systems in the latter category,
95 * we look backwards in the wtmp or wtmpx file for the last login entry
96 * for our user. Naturally this is slower and on busy systems could
97 * incur a significant performance penalty.
98 *
99 * Calling the new code
100 * --------------------
101 *
102 * In OpenSSH all login recording and retrieval is performed in
103 * login.c. Here you'll find working examples. Also, in the logintest.c
104 * program there are more examples.
105 *
106 * Internal handler calling method
107 * -------------------------------
108 *
109 * When a call is made to login_login() or login_logout(), both
110 * routines set a struct logininfo flag defining which action (log in,
111 * or log out) is to be taken. They both then call login_write(), which
112 * calls whichever of the many structure-specific handlers autoconf
113 * selects for the local system.
114 *
115 * The handlers themselves handle system data structure specifics. Both
116 * struct utmp and struct utmpx have utility functions (see
117 * construct_utmp*()) to try to make it simpler to add extra systems
118 * that introduce new features to either structure.
119 *
120 * While it may seem terribly wasteful to replicate so much similar
121 * code for each method, experience has shown that maintaining code to
122 * write both struct utmp and utmpx in one function, whilst maintaining
123 * support for all systems whether they have library support or not, is
124 * a difficult and time-consuming task.
125 *
126 * Lastlog support proceeds similarly. Functions login_get_lastlog()
127 * (and its OpenSSH-tuned friend login_get_lastlog_time()) call
128 * getlast_entry(), which tries one of three methods to find the last
129 * login time. It uses local system lastlog support if it can,
130 * otherwise it tries wtmp or wtmpx before giving up and returning 0,
131 * meaning "tilt".
132 *
133 * Maintenance
134 * -----------
135 *
136 * In many cases it's possible to tweak autoconf to select the correct
137 * methods for a particular platform, either by improving the detection
138 * code (best), or by presetting DISABLE_<method> or CONF_<method>_FILE
139 * symbols for the platform.
140 *
141 * Use logintest to check which symbols are defined before modifying
142 * configure.ac and loginrec.c. (You have to build logintest yourself
143 * with 'make logintest' as it's not built by default.)
144 *
145 * Otherwise, patches to the specific method(s) are very helpful!
146 */
andre2ff7b5d2000-06-03 14:57:40 +0000147
148#include "includes.h"
149
Damien Miller62772522006-03-15 14:01:11 +1100150#include <sys/types.h>
151#include <sys/stat.h>
Damien Miller8ec8c3e2006-07-10 20:35:38 +1000152#include <sys/socket.h>
153
154#include <netinet/in.h>
Damien Miller62772522006-03-15 14:01:11 +1100155
Darren Tucker2c1a02a2006-07-12 22:40:50 +1000156#include <errno.h>
Damien Millera1738e42006-07-10 21:33:04 +1000157#include <fcntl.h>
Darren Tuckerf19bbc32006-09-07 22:57:53 +1000158#ifdef HAVE_PATHS_H
159# include <paths.h>
160#endif
Damien Miller9f2abc42006-07-10 20:53:08 +1000161#include <pwd.h>
Damien Millerded319c2006-09-01 15:38:36 +1000162#include <stdarg.h>
Damien Millerb8fe89c2006-07-24 14:51:00 +1000163#include <string.h>
Darren Tuckerd757e692007-04-29 12:10:57 +1000164#include <time.h>
Damien Millerb8fe89c2006-07-24 14:51:00 +1000165#include <unistd.h>
Damien Miller9f2abc42006-07-10 20:53:08 +1000166
andre2ff7b5d2000-06-03 14:57:40 +0000167#include "xmalloc.h"
Damien Millerd7834352006-08-05 12:39:39 +1000168#include "key.h"
169#include "hostfile.h"
170#include "ssh.h"
andre2ff7b5d2000-06-03 14:57:40 +0000171#include "loginrec.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +0000172#include "log.h"
173#include "atomicio.h"
Darren Tucker2fba9932005-02-02 23:30:24 +1100174#include "packet.h"
175#include "canohost.h"
Darren Tucker269a1ea2005-02-03 00:20:53 +1100176#include "auth.h"
Darren Tuckera39f83e2005-02-15 22:19:28 +1100177#include "buffer.h"
andre2ff7b5d2000-06-03 14:57:40 +0000178
Ben Lindstromdcca9812000-11-10 03:28:31 +0000179#ifdef HAVE_UTIL_H
Damien Miller8899ed32004-09-12 15:18:55 +1000180# include <util.h>
Ben Lindstromdcca9812000-11-10 03:28:31 +0000181#endif
andre2ff7b5d2000-06-03 14:57:40 +0000182
Ben Lindstrome2fb8d32000-12-28 00:07:07 +0000183#ifdef HAVE_LIBUTIL_H
Damien Miller8899ed32004-09-12 15:18:55 +1000184# include <libutil.h>
Ben Lindstrome2fb8d32000-12-28 00:07:07 +0000185#endif
186
andre2ff7b5d2000-06-03 14:57:40 +0000187/**
188 ** prototypes for helper functions in this file
189 **/
190
191#if HAVE_UTMP_H
andre2ff7b5d2000-06-03 14:57:40 +0000192void set_utmp_time(struct logininfo *li, struct utmp *ut);
193void construct_utmp(struct logininfo *li, struct utmp *ut);
194#endif
195
196#ifdef HAVE_UTMPX_H
andre2ff7b5d2000-06-03 14:57:40 +0000197void set_utmpx_time(struct logininfo *li, struct utmpx *ut);
198void construct_utmpx(struct logininfo *li, struct utmpx *ut);
199#endif
200
201int utmp_write_entry(struct logininfo *li);
202int utmpx_write_entry(struct logininfo *li);
203int wtmp_write_entry(struct logininfo *li);
204int wtmpx_write_entry(struct logininfo *li);
205int lastlog_write_entry(struct logininfo *li);
206int syslogin_write_entry(struct logininfo *li);
207
208int getlast_entry(struct logininfo *li);
209int lastlog_get_entry(struct logininfo *li);
Darren Tucker261d93a2010-04-09 18:13:27 +1000210int utmpx_get_entry(struct logininfo *li);
andre2ff7b5d2000-06-03 14:57:40 +0000211int wtmp_get_entry(struct logininfo *li);
212int wtmpx_get_entry(struct logininfo *li);
213
Darren Tucker691d5232005-02-15 21:45:57 +1100214extern Buffer loginmsg;
215
andre6bb92372000-06-19 08:20:03 +0000216/* pick the shortest string */
Damien Miller8899ed32004-09-12 15:18:55 +1000217#define MIN_SIZEOF(s1,s2) (sizeof(s1) < sizeof(s2) ? sizeof(s1) : sizeof(s2))
andre6bb92372000-06-19 08:20:03 +0000218
andre2ff7b5d2000-06-03 14:57:40 +0000219/**
220 ** platform-independent login functions
221 **/
222
Damien Miller8899ed32004-09-12 15:18:55 +1000223/*
224 * login_login(struct logininfo *) - Record a login
Kevin Stevesef4eea92001-02-05 12:42:17 +0000225 *
andre6bb92372000-06-19 08:20:03 +0000226 * Call with a pointer to a struct logininfo initialised with
227 * login_init_entry() or login_alloc_entry()
228 *
229 * Returns:
230 * >0 if successful
231 * 0 on failure (will use OpenSSH's logging facilities for diagnostics)
232 */
andre61e67252000-06-04 17:07:49 +0000233int
Damien Miller8899ed32004-09-12 15:18:55 +1000234login_login(struct logininfo *li)
andre61e67252000-06-04 17:07:49 +0000235{
236 li->type = LTYPE_LOGIN;
Damien Miller8899ed32004-09-12 15:18:55 +1000237 return (login_write(li));
andre61e67252000-06-04 17:07:49 +0000238}
239
240
Damien Miller8899ed32004-09-12 15:18:55 +1000241/*
242 * login_logout(struct logininfo *) - Record a logout
andre6bb92372000-06-19 08:20:03 +0000243 *
244 * Call as with login_login()
245 *
246 * Returns:
247 * >0 if successful
248 * 0 on failure (will use OpenSSH's logging facilities for diagnostics)
249 */
andre61e67252000-06-04 17:07:49 +0000250int
251login_logout(struct logininfo *li)
252{
253 li->type = LTYPE_LOGOUT;
Damien Miller8899ed32004-09-12 15:18:55 +1000254 return (login_write(li));
andre61e67252000-06-04 17:07:49 +0000255}
256
Damien Miller8899ed32004-09-12 15:18:55 +1000257/*
258 * login_get_lastlog_time(int) - Retrieve the last login time
andre6bb92372000-06-19 08:20:03 +0000259 *
260 * Retrieve the last login time for the given uid. Will try to use the
261 * system lastlog facilities if they are available, but will fall back
262 * to looking in wtmp/wtmpx if necessary
263 *
264 * Returns:
265 * 0 on failure, or if user has never logged in
266 * Time in seconds from the epoch if successful
267 *
268 * Useful preprocessor symbols:
269 * DISABLE_LASTLOG: If set, *never* even try to retrieve lastlog
270 * info
271 * USE_LASTLOG: If set, indicates the presence of system lastlog
272 * facilities. If this and DISABLE_LASTLOG are not set,
273 * try to retrieve lastlog information from wtmp/wtmpx.
274 */
andre61e67252000-06-04 17:07:49 +0000275unsigned int
Damien Miller34ee4202010-11-05 10:52:37 +1100276login_get_lastlog_time(const uid_t uid)
andre61e67252000-06-04 17:07:49 +0000277{
278 struct logininfo li;
279
andre6bb92372000-06-19 08:20:03 +0000280 if (login_get_lastlog(&li, uid))
Damien Miller8899ed32004-09-12 15:18:55 +1000281 return (li.tv_sec);
andre6bb92372000-06-19 08:20:03 +0000282 else
Damien Miller8899ed32004-09-12 15:18:55 +1000283 return (0);
andre61e67252000-06-04 17:07:49 +0000284}
285
Damien Miller8899ed32004-09-12 15:18:55 +1000286/*
287 * login_get_lastlog(struct logininfo *, int) - Retrieve a lastlog entry
andre6bb92372000-06-19 08:20:03 +0000288 *
289 * Retrieve a logininfo structure populated (only partially) with
290 * information from the system lastlog data, or from wtmp/wtmpx if no
291 * system lastlog information exists.
292 *
293 * Note this routine must be given a pre-allocated logininfo.
294 *
295 * Returns:
296 * >0: A pointer to your struct logininfo if successful
297 * 0 on failure (will use OpenSSH's logging facilities for diagnostics)
andre6bb92372000-06-19 08:20:03 +0000298 */
andre61e67252000-06-04 17:07:49 +0000299struct logininfo *
Damien Miller34ee4202010-11-05 10:52:37 +1100300login_get_lastlog(struct logininfo *li, const uid_t uid)
andre61e67252000-06-04 17:07:49 +0000301{
andre6bb92372000-06-19 08:20:03 +0000302 struct passwd *pw;
andre6bb92372000-06-19 08:20:03 +0000303
Damien Miller348c9b72000-08-15 10:01:22 +1000304 memset(li, '\0', sizeof(*li));
andre61e67252000-06-04 17:07:49 +0000305 li->uid = uid;
andre6bb92372000-06-19 08:20:03 +0000306
Kevin Stevesef4eea92001-02-05 12:42:17 +0000307 /*
Damien Miller53c5d462000-06-28 00:50:50 +1000308 * If we don't have a 'real' lastlog, we need the username to
andre6bb92372000-06-19 08:20:03 +0000309 * reliably search wtmp(x) for the last login (see
Kevin Stevesef4eea92001-02-05 12:42:17 +0000310 * wtmp_get_entry().)
Damien Miller53c5d462000-06-28 00:50:50 +1000311 */
andre6bb92372000-06-19 08:20:03 +0000312 pw = getpwuid(uid);
Damien Millerdd47aa22000-06-27 11:18:27 +1000313 if (pw == NULL)
Damien Miller34ee4202010-11-05 10:52:37 +1100314 fatal("%s: Cannot find account for uid %ld", __func__,
315 (long)uid);
Kevin Stevesef4eea92001-02-05 12:42:17 +0000316
andre98cabe02000-06-19 09:11:30 +0000317 /* No MIN_SIZEOF here - we absolutely *must not* truncate the
Damien Miller8899ed32004-09-12 15:18:55 +1000318 * username (XXX - so check for trunc!) */
Damien Millerf8af08d2000-06-27 09:40:06 +1000319 strlcpy(li->username, pw->pw_name, sizeof(li->username));
Damien Millerdd47aa22000-06-27 11:18:27 +1000320
andre61e67252000-06-04 17:07:49 +0000321 if (getlast_entry(li))
Damien Miller8899ed32004-09-12 15:18:55 +1000322 return (li);
andre61e67252000-06-04 17:07:49 +0000323 else
Damien Miller8899ed32004-09-12 15:18:55 +1000324 return (NULL);
andre61e67252000-06-04 17:07:49 +0000325}
326
327
Damien Miller8899ed32004-09-12 15:18:55 +1000328/*
329 * login_alloc_entry(int, char*, char*, char*) - Allocate and initialise
Kevin Stevesef4eea92001-02-05 12:42:17 +0000330 * a logininfo structure
331 *
andre6bb92372000-06-19 08:20:03 +0000332 * This function creates a new struct logininfo, a data structure
333 * meant to carry the information required to portably record login info.
334 *
335 * Returns a pointer to a newly created struct logininfo. If memory
336 * allocation fails, the program halts.
337 */
andre61e67252000-06-04 17:07:49 +0000338struct
Damien Miller34ee4202010-11-05 10:52:37 +1100339logininfo *login_alloc_entry(pid_t pid, const char *username,
Damien Miller8899ed32004-09-12 15:18:55 +1000340 const char *hostname, const char *line)
andre61e67252000-06-04 17:07:49 +0000341{
andre2ff7b5d2000-06-03 14:57:40 +0000342 struct logininfo *newli;
343
Damien Miller8899ed32004-09-12 15:18:55 +1000344 newli = xmalloc(sizeof(*newli));
345 login_init_entry(newli, pid, username, hostname, line);
346 return (newli);
andre61e67252000-06-04 17:07:49 +0000347}
andre2ff7b5d2000-06-03 14:57:40 +0000348
349
andre6bb92372000-06-19 08:20:03 +0000350/* login_free_entry(struct logininfo *) - free struct memory */
andre61e67252000-06-04 17:07:49 +0000351void
352login_free_entry(struct logininfo *li)
353{
354 xfree(li);
355}
356
andre2ff7b5d2000-06-03 14:57:40 +0000357
andre6bb92372000-06-19 08:20:03 +0000358/* login_init_entry(struct logininfo *, int, char*, char*, char*)
359 * - initialise a struct logininfo
Kevin Stevesef4eea92001-02-05 12:42:17 +0000360 *
andre6bb92372000-06-19 08:20:03 +0000361 * Populates a new struct logininfo, a data structure meant to carry
362 * the information required to portably record login info.
363 *
364 * Returns: 1
365 */
andre61e67252000-06-04 17:07:49 +0000366int
Damien Miller34ee4202010-11-05 10:52:37 +1100367login_init_entry(struct logininfo *li, pid_t pid, const char *username,
Damien Miller8899ed32004-09-12 15:18:55 +1000368 const char *hostname, const char *line)
andre61e67252000-06-04 17:07:49 +0000369{
Damien Millerf8af08d2000-06-27 09:40:06 +1000370 struct passwd *pw;
Kevin Stevesef4eea92001-02-05 12:42:17 +0000371
Damien Miller348c9b72000-08-15 10:01:22 +1000372 memset(li, 0, sizeof(*li));
Kevin Stevesef4eea92001-02-05 12:42:17 +0000373
andre61e67252000-06-04 17:07:49 +0000374 li->pid = pid;
Damien Millerf8af08d2000-06-27 09:40:06 +1000375
andre2ff7b5d2000-06-03 14:57:40 +0000376 /* set the line information */
andre61e67252000-06-04 17:07:49 +0000377 if (line)
andre2ff7b5d2000-06-03 14:57:40 +0000378 line_fullname(li->line, line, sizeof(li->line));
andre2ff7b5d2000-06-03 14:57:40 +0000379
Damien Millerf8af08d2000-06-27 09:40:06 +1000380 if (username) {
andre2ff7b5d2000-06-03 14:57:40 +0000381 strlcpy(li->username, username, sizeof(li->username));
Damien Millerf8af08d2000-06-27 09:40:06 +1000382 pw = getpwnam(li->username);
Damien Miller8899ed32004-09-12 15:18:55 +1000383 if (pw == NULL) {
Damien Miller94cf4c82005-07-17 17:04:47 +1000384 fatal("%s: Cannot find user \"%s\"", __func__,
Damien Miller8899ed32004-09-12 15:18:55 +1000385 li->username);
386 }
Damien Millerf8af08d2000-06-27 09:40:06 +1000387 li->uid = pw->pw_uid;
388 }
Damien Millerdd47aa22000-06-27 11:18:27 +1000389
andre61e67252000-06-04 17:07:49 +0000390 if (hostname)
andre2ff7b5d2000-06-03 14:57:40 +0000391 strlcpy(li->hostname, hostname, sizeof(li->hostname));
Damien Millerf8af08d2000-06-27 09:40:06 +1000392
Damien Miller8899ed32004-09-12 15:18:55 +1000393 return (1);
andre2ff7b5d2000-06-03 14:57:40 +0000394}
395
Damien Miller94cf4c82005-07-17 17:04:47 +1000396/*
Damien Miller8899ed32004-09-12 15:18:55 +1000397 * login_set_current_time(struct logininfo *) - set the current time
andre6bb92372000-06-19 08:20:03 +0000398 *
399 * Set the current time in a logininfo structure. This function is
400 * meant to eliminate the need to deal with system dependencies for
401 * time handling.
402 */
andre2ff7b5d2000-06-03 14:57:40 +0000403void
andre61e67252000-06-04 17:07:49 +0000404login_set_current_time(struct logininfo *li)
405{
andre2ff7b5d2000-06-03 14:57:40 +0000406 struct timeval tv;
407
408 gettimeofday(&tv, NULL);
Kevin Stevesef4eea92001-02-05 12:42:17 +0000409
Damien Millerf8af08d2000-06-27 09:40:06 +1000410 li->tv_sec = tv.tv_sec;
411 li->tv_usec = tv.tv_usec;
andre2ff7b5d2000-06-03 14:57:40 +0000412}
413
andre61e67252000-06-04 17:07:49 +0000414/* copy a sockaddr_* into our logininfo */
andre2ff7b5d2000-06-03 14:57:40 +0000415void
andre61e67252000-06-04 17:07:49 +0000416login_set_addr(struct logininfo *li, const struct sockaddr *sa,
Damien Miller8899ed32004-09-12 15:18:55 +1000417 const unsigned int sa_size)
andre61e67252000-06-04 17:07:49 +0000418{
419 unsigned int bufsize = sa_size;
420
421 /* make sure we don't overrun our union */
422 if (sizeof(li->hostaddr) < sa_size)
423 bufsize = sizeof(li->hostaddr);
424
Damien Miller8899ed32004-09-12 15:18:55 +1000425 memcpy(&li->hostaddr.sa, sa, bufsize);
andre2ff7b5d2000-06-03 14:57:40 +0000426}
427
andre2ff7b5d2000-06-03 14:57:40 +0000428
andre61e67252000-06-04 17:07:49 +0000429/**
430 ** login_write: Call low-level recording functions based on autoconf
431 ** results
432 **/
andre2ff7b5d2000-06-03 14:57:40 +0000433int
Damien Miller8899ed32004-09-12 15:18:55 +1000434login_write(struct logininfo *li)
andre61e67252000-06-04 17:07:49 +0000435{
Damien Millerbac2d8a2000-09-05 16:13:06 +1100436#ifndef HAVE_CYGWIN
Damien Miller8899ed32004-09-12 15:18:55 +1000437 if (geteuid() != 0) {
438 logit("Attempt to write login records by non-root user (aborting)");
439 return (1);
andre2ff7b5d2000-06-03 14:57:40 +0000440 }
Damien Millerbac2d8a2000-09-05 16:13:06 +1100441#endif
Damien Millerdd47aa22000-06-27 11:18:27 +1000442
andre2ff7b5d2000-06-03 14:57:40 +0000443 /* set the timestamp */
444 login_set_current_time(li);
445#ifdef USE_LOGIN
446 syslogin_write_entry(li);
447#endif
448#ifdef USE_LASTLOG
Damien Miller8899ed32004-09-12 15:18:55 +1000449 if (li->type == LTYPE_LOGIN)
andre2ff7b5d2000-06-03 14:57:40 +0000450 lastlog_write_entry(li);
andre2ff7b5d2000-06-03 14:57:40 +0000451#endif
452#ifdef USE_UTMP
453 utmp_write_entry(li);
454#endif
455#ifdef USE_WTMP
456 wtmp_write_entry(li);
457#endif
458#ifdef USE_UTMPX
459 utmpx_write_entry(li);
460#endif
461#ifdef USE_WTMPX
462 wtmpx_write_entry(li);
463#endif
Darren Tucker397a2f22004-08-15 00:09:11 +1000464#ifdef CUSTOM_SYS_AUTH_RECORD_LOGIN
Damien Miller94cf4c82005-07-17 17:04:47 +1000465 if (li->type == LTYPE_LOGIN &&
Damien Millerb6f72f52005-07-17 17:26:43 +1000466 !sys_auth_record_login(li->username,li->hostname,li->line,
467 &loginmsg))
Darren Tucker397a2f22004-08-15 00:09:11 +1000468 logit("Writing login record failed for %s", li->username);
469#endif
Darren Tucker2e0cf0d2005-02-08 21:52:47 +1100470#ifdef SSH_AUDIT_EVENTS
Darren Tucker269a1ea2005-02-03 00:20:53 +1100471 if (li->type == LTYPE_LOGIN)
472 audit_session_open(li->line);
473 else if (li->type == LTYPE_LOGOUT)
474 audit_session_close(li->line);
475#endif
Damien Miller8899ed32004-09-12 15:18:55 +1000476 return (0);
andre2ff7b5d2000-06-03 14:57:40 +0000477}
478
Ben Lindstrom97c677d2001-05-08 20:33:05 +0000479#ifdef LOGIN_NEEDS_UTMPX
480int
481login_utmp_only(struct logininfo *li)
482{
Damien Millera8e06ce2003-11-21 23:48:55 +1100483 li->type = LTYPE_LOGIN;
Ben Lindstrom9197c592001-10-26 15:56:55 +0000484 login_set_current_time(li);
Ben Lindstrom97c677d2001-05-08 20:33:05 +0000485# ifdef USE_UTMP
486 utmp_write_entry(li);
487# endif
488# ifdef USE_WTMP
489 wtmp_write_entry(li);
490# endif
491# ifdef USE_UTMPX
492 utmpx_write_entry(li);
493# endif
494# ifdef USE_WTMPX
495 wtmpx_write_entry(li);
496# endif
Damien Miller8899ed32004-09-12 15:18:55 +1000497 return (0);
Ben Lindstrom97c677d2001-05-08 20:33:05 +0000498}
499#endif
500
andre2ff7b5d2000-06-03 14:57:40 +0000501/**
andre61e67252000-06-04 17:07:49 +0000502 ** getlast_entry: Call low-level functions to retrieve the last login
503 ** time.
andre2ff7b5d2000-06-03 14:57:40 +0000504 **/
505
andre61e67252000-06-04 17:07:49 +0000506/* take the uid in li and return the last login time */
507int
508getlast_entry(struct logininfo *li)
509{
510#ifdef USE_LASTLOG
Damien Miller53c5d462000-06-28 00:50:50 +1000511 return(lastlog_get_entry(li));
Damien Millerdd47aa22000-06-27 11:18:27 +1000512#else /* !USE_LASTLOG */
Darren Tucker261d93a2010-04-09 18:13:27 +1000513#if defined(USE_UTMPX) && defined(HAVE_SETUTXDB) && \
514 defined(UTXDB_LASTLOGIN) && defined(HAVE_GETUTXUSER)
515 return (utmpx_get_entry(li));
516#endif
andre61e67252000-06-04 17:07:49 +0000517
Damien Miller8899ed32004-09-12 15:18:55 +1000518#if defined(DISABLE_LASTLOG)
Kevin Stevesef4eea92001-02-05 12:42:17 +0000519 /* On some systems we shouldn't even try to obtain last login
andreecaabf12000-06-12 22:21:44 +0000520 * time, e.g. AIX */
Damien Miller8899ed32004-09-12 15:18:55 +1000521 return (0);
522# elif defined(USE_WTMP) && \
523 (defined(HAVE_TIME_IN_UTMP) || defined(HAVE_TV_IN_UTMP))
andre61e67252000-06-04 17:07:49 +0000524 /* retrieve last login time from utmp */
Damien Millerdd47aa22000-06-27 11:18:27 +1000525 return (wtmp_get_entry(li));
Damien Miller8899ed32004-09-12 15:18:55 +1000526# elif defined(USE_WTMPX) && \
527 (defined(HAVE_TIME_IN_UTMPX) || defined(HAVE_TV_IN_UTMPX))
andre61e67252000-06-04 17:07:49 +0000528 /* If wtmp isn't available, try wtmpx */
Damien Millerdd47aa22000-06-27 11:18:27 +1000529 return (wtmpx_get_entry(li));
Damien Miller8899ed32004-09-12 15:18:55 +1000530# else
andre61e67252000-06-04 17:07:49 +0000531 /* Give up: No means of retrieving last login time */
Damien Miller8899ed32004-09-12 15:18:55 +1000532 return (0);
Kevin Stevesef4eea92001-02-05 12:42:17 +0000533# endif /* DISABLE_LASTLOG */
Damien Millerdd47aa22000-06-27 11:18:27 +1000534#endif /* USE_LASTLOG */
andre61e67252000-06-04 17:07:49 +0000535}
536
537
538
andre2ff7b5d2000-06-03 14:57:40 +0000539/*
andre61e67252000-06-04 17:07:49 +0000540 * 'line' string utility functions
541 *
542 * These functions process the 'line' string into one of three forms:
543 *
andre2ff7b5d2000-06-03 14:57:40 +0000544 * 1. The full filename (including '/dev')
545 * 2. The stripped name (excluding '/dev')
andre61e67252000-06-04 17:07:49 +0000546 * 3. The abbreviated name (e.g. /dev/ttyp00 -> yp00
547 * /dev/pts/1 -> ts/1 )
andre2ff7b5d2000-06-03 14:57:40 +0000548 *
549 * Form 3 is used on some systems to identify a .tmp.? entry when
550 * attempting to remove it. Typically both addition and removal is
andre61e67252000-06-04 17:07:49 +0000551 * performed by one application - say, sshd - so as long as the choice
552 * uniquely identifies a terminal it's ok.
andre2ff7b5d2000-06-03 14:57:40 +0000553 */
554
555
Damien Miller8899ed32004-09-12 15:18:55 +1000556/*
557 * line_fullname(): add the leading '/dev/' if it doesn't exist make
558 * sure dst has enough space, if not just copy src (ugh)
559 */
andre2ff7b5d2000-06-03 14:57:40 +0000560char *
Damien Miller52c8afe2005-06-19 10:19:43 +1000561line_fullname(char *dst, const char *src, u_int dstsize)
andre61e67252000-06-04 17:07:49 +0000562{
andre2ff7b5d2000-06-03 14:57:40 +0000563 memset(dst, '\0', dstsize);
Damien Miller8899ed32004-09-12 15:18:55 +1000564 if ((strncmp(src, "/dev/", 5) == 0) || (dstsize < (strlen(src) + 5)))
andre2ff7b5d2000-06-03 14:57:40 +0000565 strlcpy(dst, src, dstsize);
Damien Miller8899ed32004-09-12 15:18:55 +1000566 else {
Damien Miller1a132252000-06-13 21:23:17 +1000567 strlcpy(dst, "/dev/", dstsize);
andre2ff7b5d2000-06-03 14:57:40 +0000568 strlcat(dst, src, dstsize);
569 }
Damien Miller8899ed32004-09-12 15:18:55 +1000570 return (dst);
andre2ff7b5d2000-06-03 14:57:40 +0000571}
572
andre61e67252000-06-04 17:07:49 +0000573/* line_stripname(): strip the leading '/dev' if it exists, return dst */
andre2ff7b5d2000-06-03 14:57:40 +0000574char *
andre61e67252000-06-04 17:07:49 +0000575line_stripname(char *dst, const char *src, int dstsize)
576{
andre2ff7b5d2000-06-03 14:57:40 +0000577 memset(dst, '\0', dstsize);
578 if (strncmp(src, "/dev/", 5) == 0)
Damien Millerf5a81472000-09-30 21:34:44 +1100579 strlcpy(dst, src + 5, dstsize);
andre2ff7b5d2000-06-03 14:57:40 +0000580 else
581 strlcpy(dst, src, dstsize);
Damien Miller8899ed32004-09-12 15:18:55 +1000582 return (dst);
andre61e67252000-06-04 17:07:49 +0000583}
584
Damien Miller94cf4c82005-07-17 17:04:47 +1000585/*
Damien Miller8899ed32004-09-12 15:18:55 +1000586 * line_abbrevname(): Return the abbreviated (usually four-character)
andre61e67252000-06-04 17:07:49 +0000587 * form of the line (Just use the last <dstsize> characters of the
588 * full name.)
589 *
590 * NOTE: use strncpy because we do NOT necessarily want zero
Damien Miller8899ed32004-09-12 15:18:55 +1000591 * termination
592 */
andre2ff7b5d2000-06-03 14:57:40 +0000593char *
Kevin Stevesef4eea92001-02-05 12:42:17 +0000594line_abbrevname(char *dst, const char *src, int dstsize)
Damien Millerdd47aa22000-06-27 11:18:27 +1000595{
596 size_t len;
Kevin Stevesef4eea92001-02-05 12:42:17 +0000597
andre2ff7b5d2000-06-03 14:57:40 +0000598 memset(dst, '\0', dstsize);
Kevin Stevesef4eea92001-02-05 12:42:17 +0000599
Damien Miller8e81ed32000-07-01 13:17:42 +1000600 /* Always skip prefix if present */
601 if (strncmp(src, "/dev/", 5) == 0)
602 src += 5;
Kevin Stevesef4eea92001-02-05 12:42:17 +0000603
Damien Millerf1b9d112002-04-23 23:09:19 +1000604#ifdef WITH_ABBREV_NO_TTY
605 if (strncmp(src, "tty", 3) == 0)
606 src += 3;
607#endif
608
Damien Millerdd47aa22000-06-27 11:18:27 +1000609 len = strlen(src);
610
Damien Miller8e81ed32000-07-01 13:17:42 +1000611 if (len > 0) {
612 if (((int)len - dstsize) > 0)
613 src += ((int)len - dstsize);
614
615 /* note: _don't_ change this to strlcpy */
Kevin Stevesef4eea92001-02-05 12:42:17 +0000616 strncpy(dst, src, (size_t)dstsize);
Damien Millerdd47aa22000-06-27 11:18:27 +1000617 }
Kevin Stevesef4eea92001-02-05 12:42:17 +0000618
Damien Miller8899ed32004-09-12 15:18:55 +1000619 return (dst);
andre2ff7b5d2000-06-03 14:57:40 +0000620}
621
andre2ff7b5d2000-06-03 14:57:40 +0000622/**
623 ** utmp utility functions
andre61e67252000-06-04 17:07:49 +0000624 **
625 ** These functions manipulate struct utmp, taking system differences
626 ** into account.
andre2ff7b5d2000-06-03 14:57:40 +0000627 **/
628
629#if defined(USE_UTMP) || defined (USE_WTMP) || defined (USE_LOGIN)
630
andre2ff7b5d2000-06-03 14:57:40 +0000631/* build the utmp structure */
632void
andre61e67252000-06-04 17:07:49 +0000633set_utmp_time(struct logininfo *li, struct utmp *ut)
634{
Damien Miller8899ed32004-09-12 15:18:55 +1000635# if defined(HAVE_TV_IN_UTMP)
andre2ff7b5d2000-06-03 14:57:40 +0000636 ut->ut_tv.tv_sec = li->tv_sec;
637 ut->ut_tv.tv_usec = li->tv_usec;
Damien Miller8899ed32004-09-12 15:18:55 +1000638# elif defined(HAVE_TIME_IN_UTMP)
andre2ff7b5d2000-06-03 14:57:40 +0000639 ut->ut_time = li->tv_sec;
Damien Millerdd47aa22000-06-27 11:18:27 +1000640# endif
andre2ff7b5d2000-06-03 14:57:40 +0000641}
642
643void
644construct_utmp(struct logininfo *li,
andre61e67252000-06-04 17:07:49 +0000645 struct utmp *ut)
646{
Damien Miller02e16ad2003-01-03 14:42:27 +1100647# ifdef HAVE_ADDR_V6_IN_UTMP
648 struct sockaddr_in6 *sa6;
Damien Miller8899ed32004-09-12 15:18:55 +1000649# endif
650
Damien Miller348c9b72000-08-15 10:01:22 +1000651 memset(ut, '\0', sizeof(*ut));
andre6bb92372000-06-19 08:20:03 +0000652
653 /* First fill out fields used for both logins and logouts */
654
Damien Millerdd47aa22000-06-27 11:18:27 +1000655# ifdef HAVE_ID_IN_UTMP
andre2ff7b5d2000-06-03 14:57:40 +0000656 line_abbrevname(ut->ut_id, li->line, sizeof(ut->ut_id));
Damien Millerdd47aa22000-06-27 11:18:27 +1000657# endif
andre2ff7b5d2000-06-03 14:57:40 +0000658
Damien Millerdd47aa22000-06-27 11:18:27 +1000659# ifdef HAVE_TYPE_IN_UTMP
andre6bb92372000-06-19 08:20:03 +0000660 /* This is done here to keep utmp constants out of struct logininfo */
andre2ff7b5d2000-06-03 14:57:40 +0000661 switch (li->type) {
662 case LTYPE_LOGIN:
663 ut->ut_type = USER_PROCESS;
Tim Rice81ed5182002-09-25 17:38:46 -0700664#ifdef _UNICOS
Ben Lindstrom6db66ff2001-08-06 23:29:16 +0000665 cray_set_tmpdir(ut);
666#endif
andre2ff7b5d2000-06-03 14:57:40 +0000667 break;
668 case LTYPE_LOGOUT:
669 ut->ut_type = DEAD_PROCESS;
Tim Rice81ed5182002-09-25 17:38:46 -0700670#ifdef _UNICOS
Ben Lindstrom6db66ff2001-08-06 23:29:16 +0000671 cray_retain_utmp(ut, li->pid);
672#endif
andre2ff7b5d2000-06-03 14:57:40 +0000673 break;
674 }
Damien Millerdd47aa22000-06-27 11:18:27 +1000675# endif
andre6bb92372000-06-19 08:20:03 +0000676 set_utmp_time(li, ut);
andre2ff7b5d2000-06-03 14:57:40 +0000677
andre6bb92372000-06-19 08:20:03 +0000678 line_stripname(ut->ut_line, li->line, sizeof(ut->ut_line));
Damien Millerdd47aa22000-06-27 11:18:27 +1000679
680# ifdef HAVE_PID_IN_UTMP
andre2ff7b5d2000-06-03 14:57:40 +0000681 ut->ut_pid = li->pid;
Damien Millerdd47aa22000-06-27 11:18:27 +1000682# endif
andre6bb92372000-06-19 08:20:03 +0000683
684 /* If we're logging out, leave all other fields blank */
685 if (li->type == LTYPE_LOGOUT)
Damien Miller8899ed32004-09-12 15:18:55 +1000686 return;
andre6bb92372000-06-19 08:20:03 +0000687
Damien Millerdd47aa22000-06-27 11:18:27 +1000688 /*
689 * These fields are only used when logging in, and are blank
Kevin Stevesef4eea92001-02-05 12:42:17 +0000690 * for logouts.
Damien Millerdd47aa22000-06-27 11:18:27 +1000691 */
andre6bb92372000-06-19 08:20:03 +0000692
693 /* Use strncpy because we don't necessarily want null termination */
Damien Miller8899ed32004-09-12 15:18:55 +1000694 strncpy(ut->ut_name, li->username,
695 MIN_SIZEOF(ut->ut_name, li->username));
Damien Millerdd47aa22000-06-27 11:18:27 +1000696# ifdef HAVE_HOST_IN_UTMP
Damien Miller8899ed32004-09-12 15:18:55 +1000697 strncpy(ut->ut_host, li->hostname,
698 MIN_SIZEOF(ut->ut_host, li->hostname));
Damien Millerdd47aa22000-06-27 11:18:27 +1000699# endif
700# ifdef HAVE_ADDR_IN_UTMP
andre61e67252000-06-04 17:07:49 +0000701 /* this is just a 32-bit IP address */
702 if (li->hostaddr.sa.sa_family == AF_INET)
703 ut->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr;
Kevin Stevesef4eea92001-02-05 12:42:17 +0000704# endif
Damien Miller02e16ad2003-01-03 14:42:27 +1100705# ifdef HAVE_ADDR_V6_IN_UTMP
706 /* this is just a 128-bit IPv6 address */
707 if (li->hostaddr.sa.sa_family == AF_INET6) {
708 sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa);
709 memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16);
710 if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) {
711 ut->ut_addr_v6[0] = ut->ut_addr_v6[3];
712 ut->ut_addr_v6[1] = 0;
713 ut->ut_addr_v6[2] = 0;
714 ut->ut_addr_v6[3] = 0;
715 }
716 }
717# endif
andre61e67252000-06-04 17:07:49 +0000718}
Damien Millerdd47aa22000-06-27 11:18:27 +1000719#endif /* USE_UTMP || USE_WTMP || USE_LOGIN */
andre61e67252000-06-04 17:07:49 +0000720
andre2ff7b5d2000-06-03 14:57:40 +0000721/**
722 ** utmpx utility functions
andre61e67252000-06-04 17:07:49 +0000723 **
724 ** These functions manipulate struct utmpx, accounting for system
725 ** variations.
andre2ff7b5d2000-06-03 14:57:40 +0000726 **/
727
728#if defined(USE_UTMPX) || defined (USE_WTMPX)
andre2ff7b5d2000-06-03 14:57:40 +0000729/* build the utmpx structure */
730void
andre61e67252000-06-04 17:07:49 +0000731set_utmpx_time(struct logininfo *li, struct utmpx *utx)
732{
Damien Miller8899ed32004-09-12 15:18:55 +1000733# if defined(HAVE_TV_IN_UTMPX)
andre2ff7b5d2000-06-03 14:57:40 +0000734 utx->ut_tv.tv_sec = li->tv_sec;
735 utx->ut_tv.tv_usec = li->tv_usec;
Damien Miller8899ed32004-09-12 15:18:55 +1000736# elif defined(HAVE_TIME_IN_UTMPX)
andre2ff7b5d2000-06-03 14:57:40 +0000737 utx->ut_time = li->tv_sec;
Damien Miller8899ed32004-09-12 15:18:55 +1000738# endif
andre2ff7b5d2000-06-03 14:57:40 +0000739}
740
andre61e67252000-06-04 17:07:49 +0000741void
742construct_utmpx(struct logininfo *li, struct utmpx *utx)
743{
Damien Miller02e16ad2003-01-03 14:42:27 +1100744# ifdef HAVE_ADDR_V6_IN_UTMP
745 struct sockaddr_in6 *sa6;
746# endif
Damien Miller348c9b72000-08-15 10:01:22 +1000747 memset(utx, '\0', sizeof(*utx));
Damien Miller8899ed32004-09-12 15:18:55 +1000748
Damien Miller8e81ed32000-07-01 13:17:42 +1000749# ifdef HAVE_ID_IN_UTMPX
andre2ff7b5d2000-06-03 14:57:40 +0000750 line_abbrevname(utx->ut_id, li->line, sizeof(utx->ut_id));
Damien Miller8e81ed32000-07-01 13:17:42 +1000751# endif
andre2ff7b5d2000-06-03 14:57:40 +0000752
753 /* this is done here to keep utmp constants out of loginrec.h */
754 switch (li->type) {
755 case LTYPE_LOGIN:
756 utx->ut_type = USER_PROCESS;
757 break;
758 case LTYPE_LOGOUT:
759 utx->ut_type = DEAD_PROCESS;
760 break;
761 }
andre2ff7b5d2000-06-03 14:57:40 +0000762 line_stripname(utx->ut_line, li->line, sizeof(utx->ut_line));
andre2ff7b5d2000-06-03 14:57:40 +0000763 set_utmpx_time(li, utx);
andre6bb92372000-06-19 08:20:03 +0000764 utx->ut_pid = li->pid;
Damien Miller8899ed32004-09-12 15:18:55 +1000765
Tim Ricee06ae4a2002-02-24 17:56:46 -0800766 /* strncpy(): Don't necessarily want null termination */
Darren Tucker0b8a2262010-01-09 18:18:04 +1100767 strncpy(utx->ut_user, li->username,
768 MIN_SIZEOF(utx->ut_user, li->username));
andre6bb92372000-06-19 08:20:03 +0000769
770 if (li->type == LTYPE_LOGOUT)
771 return;
772
Damien Millerdd47aa22000-06-27 11:18:27 +1000773 /*
774 * These fields are only used when logging in, and are blank
Kevin Stevesef4eea92001-02-05 12:42:17 +0000775 * for logouts.
Damien Millerdd47aa22000-06-27 11:18:27 +1000776 */
andre6bb92372000-06-19 08:20:03 +0000777
Damien Millerdd47aa22000-06-27 11:18:27 +1000778# ifdef HAVE_HOST_IN_UTMPX
Damien Miller8899ed32004-09-12 15:18:55 +1000779 strncpy(utx->ut_host, li->hostname,
780 MIN_SIZEOF(utx->ut_host, li->hostname));
Damien Millerdd47aa22000-06-27 11:18:27 +1000781# endif
782# ifdef HAVE_ADDR_IN_UTMPX
Damien Millerd6f204d2000-09-23 13:57:27 +1100783 /* this is just a 32-bit IP address */
784 if (li->hostaddr.sa.sa_family == AF_INET)
785 utx->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr;
Damien Millerdd47aa22000-06-27 11:18:27 +1000786# endif
Damien Miller02e16ad2003-01-03 14:42:27 +1100787# ifdef HAVE_ADDR_V6_IN_UTMP
788 /* this is just a 128-bit IPv6 address */
789 if (li->hostaddr.sa.sa_family == AF_INET6) {
790 sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa);
791 memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16);
792 if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) {
793 ut->ut_addr_v6[0] = ut->ut_addr_v6[3];
794 ut->ut_addr_v6[1] = 0;
795 ut->ut_addr_v6[2] = 0;
796 ut->ut_addr_v6[3] = 0;
797 }
798 }
799# endif
Damien Millerdd47aa22000-06-27 11:18:27 +1000800# ifdef HAVE_SYSLEN_IN_UTMPX
andre6bb92372000-06-19 08:20:03 +0000801 /* ut_syslen is the length of the utx_host string */
802 utx->ut_syslen = MIN(strlen(li->hostname), sizeof(utx->ut_host));
Damien Millerdd47aa22000-06-27 11:18:27 +1000803# endif
andre61e67252000-06-04 17:07:49 +0000804}
Damien Millerdd47aa22000-06-27 11:18:27 +1000805#endif /* USE_UTMPX || USE_WTMPX */
andre2ff7b5d2000-06-03 14:57:40 +0000806
807/**
andre61e67252000-06-04 17:07:49 +0000808 ** Low-level utmp functions
andre2ff7b5d2000-06-03 14:57:40 +0000809 **/
810
811/* FIXME: (ATL) utmp_write_direct needs testing */
andre2ff7b5d2000-06-03 14:57:40 +0000812#ifdef USE_UTMP
813
andre2ff7b5d2000-06-03 14:57:40 +0000814/* if we can, use pututline() etc. */
Damien Millerdd47aa22000-06-27 11:18:27 +1000815# if !defined(DISABLE_PUTUTLINE) && defined(HAVE_SETUTENT) && \
816 defined(HAVE_PUTUTLINE)
andre2ff7b5d2000-06-03 14:57:40 +0000817# define UTMP_USE_LIBRARY
Damien Millerdd47aa22000-06-27 11:18:27 +1000818# endif
andre2ff7b5d2000-06-03 14:57:40 +0000819
820
821/* write a utmp entry with the system's help (pututline() and pals) */
Damien Millerdd47aa22000-06-27 11:18:27 +1000822# ifdef UTMP_USE_LIBRARY
andre2ff7b5d2000-06-03 14:57:40 +0000823static int
andre61e67252000-06-04 17:07:49 +0000824utmp_write_library(struct logininfo *li, struct utmp *ut)
825{
andre2ff7b5d2000-06-03 14:57:40 +0000826 setutent();
827 pututline(ut);
Damien Millerdd47aa22000-06-27 11:18:27 +1000828# ifdef HAVE_ENDUTENT
andre2ff7b5d2000-06-03 14:57:40 +0000829 endutent();
Damien Millerdd47aa22000-06-27 11:18:27 +1000830# endif
Damien Miller8899ed32004-09-12 15:18:55 +1000831 return (1);
andre61e67252000-06-04 17:07:49 +0000832}
Damien Millerdd47aa22000-06-27 11:18:27 +1000833# else /* UTMP_USE_LIBRARY */
andre2ff7b5d2000-06-03 14:57:40 +0000834
Damien Miller94cf4c82005-07-17 17:04:47 +1000835/*
Damien Miller8899ed32004-09-12 15:18:55 +1000836 * Write a utmp entry direct to the file
837 * This is a slightly modification of code in OpenBSD's login.c
838 */
andre2ff7b5d2000-06-03 14:57:40 +0000839static int
andre61e67252000-06-04 17:07:49 +0000840utmp_write_direct(struct logininfo *li, struct utmp *ut)
841{
andre2ff7b5d2000-06-03 14:57:40 +0000842 struct utmp old_ut;
843 register int fd;
844 int tty;
845
andre6bb92372000-06-19 08:20:03 +0000846 /* FIXME: (ATL) ttyslot() needs local implementation */
Damien Miller348c9b72000-08-15 10:01:22 +1000847
Damien Millere5192fa2000-08-29 14:30:37 +1100848#if defined(HAVE_GETTTYENT)
Damien Miller8899ed32004-09-12 15:18:55 +1000849 struct ttyent *ty;
Damien Miller348c9b72000-08-15 10:01:22 +1000850
851 tty=0;
Damien Miller348c9b72000-08-15 10:01:22 +1000852 setttyent();
Damien Miller8899ed32004-09-12 15:18:55 +1000853 while (NULL != (ty = getttyent())) {
Damien Miller348c9b72000-08-15 10:01:22 +1000854 tty++;
855 if (!strncmp(ty->ty_name, ut->ut_line, sizeof(ut->ut_line)))
856 break;
857 }
858 endttyent();
859
Damien Miller8899ed32004-09-12 15:18:55 +1000860 if (NULL == ty) {
Damien Miller81409592004-08-15 19:12:52 +1000861 logit("%s: tty not found", __func__);
862 return (0);
Damien Miller348c9b72000-08-15 10:01:22 +1000863 }
864#else /* FIXME */
865
andre2ff7b5d2000-06-03 14:57:40 +0000866 tty = ttyslot(); /* seems only to work for /dev/ttyp? style names */
867
Damien Millere5192fa2000-08-29 14:30:37 +1100868#endif /* HAVE_GETTTYENT */
Damien Miller348c9b72000-08-15 10:01:22 +1000869
andre2ff7b5d2000-06-03 14:57:40 +0000870 if (tty > 0 && (fd = open(UTMP_FILE, O_RDWR|O_CREAT, 0644)) >= 0) {
Damien Miller81409592004-08-15 19:12:52 +1000871 off_t pos, ret;
872
873 pos = (off_t)tty * sizeof(struct utmp);
874 if ((ret = lseek(fd, pos, SEEK_SET)) == -1) {
Damien Millerb0419f22004-08-23 21:53:28 +1000875 logit("%s: lseek: %s", __func__, strerror(errno));
Damien Miller81409592004-08-15 19:12:52 +1000876 return (0);
877 }
878 if (ret != pos) {
Damien Miller94cf4c82005-07-17 17:04:47 +1000879 logit("%s: Couldn't seek to tty %d slot in %s",
Damien Millerb0419f22004-08-23 21:53:28 +1000880 __func__, tty, UTMP_FILE);
Damien Miller81409592004-08-15 19:12:52 +1000881 return (0);
882 }
andre2ff7b5d2000-06-03 14:57:40 +0000883 /*
884 * Prevent luser from zero'ing out ut_host.
885 * If the new ut_line is empty but the old one is not
Damien Miller7a0e5dc2000-07-11 12:15:54 +1000886 * and ut_line and ut_name match, preserve the old ut_line.
andre2ff7b5d2000-06-03 14:57:40 +0000887 */
Kevin Stevesef4eea92001-02-05 12:42:17 +0000888 if (atomicio(read, fd, &old_ut, sizeof(old_ut)) == sizeof(old_ut) &&
Damien Miller8899ed32004-09-12 15:18:55 +1000889 (ut->ut_host[0] == '\0') && (old_ut.ut_host[0] != '\0') &&
890 (strncmp(old_ut.ut_line, ut->ut_line, sizeof(ut->ut_line)) == 0) &&
891 (strncmp(old_ut.ut_name, ut->ut_name, sizeof(ut->ut_name)) == 0))
892 memcpy(ut->ut_host, old_ut.ut_host, sizeof(ut->ut_host));
Kevin Stevesef4eea92001-02-05 12:42:17 +0000893
Damien Miller81409592004-08-15 19:12:52 +1000894 if ((ret = lseek(fd, pos, SEEK_SET)) == -1) {
Damien Millerb0419f22004-08-23 21:53:28 +1000895 logit("%s: lseek: %s", __func__, strerror(errno));
Damien Miller81409592004-08-15 19:12:52 +1000896 return (0);
897 }
898 if (ret != pos) {
Damien Millerb0419f22004-08-23 21:53:28 +1000899 logit("%s: Couldn't seek to tty %d slot in %s",
Damien Miller81409592004-08-15 19:12:52 +1000900 __func__, tty, UTMP_FILE);
901 return (0);
902 }
Damien Miller8899ed32004-09-12 15:18:55 +1000903 if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) {
Damien Miller81409592004-08-15 19:12:52 +1000904 logit("%s: error writing %s: %s", __func__,
andre6bb92372000-06-19 08:20:03 +0000905 UTMP_FILE, strerror(errno));
Damien Miller8899ed32004-09-12 15:18:55 +1000906 }
Kevin Stevesef4eea92001-02-05 12:42:17 +0000907
Damien Miller8899ed32004-09-12 15:18:55 +1000908 close(fd);
909 return (1);
Damien Miller53c5d462000-06-28 00:50:50 +1000910 } else {
Damien Miller8899ed32004-09-12 15:18:55 +1000911 return (0);
Damien Miller53c5d462000-06-28 00:50:50 +1000912 }
andre61e67252000-06-04 17:07:49 +0000913}
Damien Millerdd47aa22000-06-27 11:18:27 +1000914# endif /* UTMP_USE_LIBRARY */
andre2ff7b5d2000-06-03 14:57:40 +0000915
916static int
andre61e67252000-06-04 17:07:49 +0000917utmp_perform_login(struct logininfo *li)
918{
andre2ff7b5d2000-06-03 14:57:40 +0000919 struct utmp ut;
920
921 construct_utmp(li, &ut);
Damien Millerdd47aa22000-06-27 11:18:27 +1000922# ifdef UTMP_USE_LIBRARY
andre2ff7b5d2000-06-03 14:57:40 +0000923 if (!utmp_write_library(li, &ut)) {
Damien Miller6b0279c2004-09-12 15:25:17 +1000924 logit("%s: utmp_write_library() failed", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +1000925 return (0);
andre2ff7b5d2000-06-03 14:57:40 +0000926 }
Damien Millerdd47aa22000-06-27 11:18:27 +1000927# else
andre2ff7b5d2000-06-03 14:57:40 +0000928 if (!utmp_write_direct(li, &ut)) {
Damien Miller6b0279c2004-09-12 15:25:17 +1000929 logit("%s: utmp_write_direct() failed", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +1000930 return (0);
andre2ff7b5d2000-06-03 14:57:40 +0000931 }
Damien Millerdd47aa22000-06-27 11:18:27 +1000932# endif
Damien Miller8899ed32004-09-12 15:18:55 +1000933 return (1);
andre61e67252000-06-04 17:07:49 +0000934}
andre2ff7b5d2000-06-03 14:57:40 +0000935
936
937static int
andre61e67252000-06-04 17:07:49 +0000938utmp_perform_logout(struct logininfo *li)
939{
andre2ff7b5d2000-06-03 14:57:40 +0000940 struct utmp ut;
941
andre6bb92372000-06-19 08:20:03 +0000942 construct_utmp(li, &ut);
Damien Millerdd47aa22000-06-27 11:18:27 +1000943# ifdef UTMP_USE_LIBRARY
andre6bb92372000-06-19 08:20:03 +0000944 if (!utmp_write_library(li, &ut)) {
Damien Miller6b0279c2004-09-12 15:25:17 +1000945 logit("%s: utmp_write_library() failed", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +1000946 return (0);
andre6bb92372000-06-19 08:20:03 +0000947 }
Damien Millerdd47aa22000-06-27 11:18:27 +1000948# else
andre6bb92372000-06-19 08:20:03 +0000949 if (!utmp_write_direct(li, &ut)) {
Damien Miller6b0279c2004-09-12 15:25:17 +1000950 logit("%s: utmp_write_direct() failed", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +1000951 return (0);
andre6bb92372000-06-19 08:20:03 +0000952 }
Damien Millerdd47aa22000-06-27 11:18:27 +1000953# endif
Damien Miller8899ed32004-09-12 15:18:55 +1000954 return (1);
andre61e67252000-06-04 17:07:49 +0000955}
andre2ff7b5d2000-06-03 14:57:40 +0000956
957
958int
andre61e67252000-06-04 17:07:49 +0000959utmp_write_entry(struct logininfo *li)
960{
andre2ff7b5d2000-06-03 14:57:40 +0000961 switch(li->type) {
962 case LTYPE_LOGIN:
Damien Miller8899ed32004-09-12 15:18:55 +1000963 return (utmp_perform_login(li));
andre2ff7b5d2000-06-03 14:57:40 +0000964
965 case LTYPE_LOGOUT:
Damien Miller8899ed32004-09-12 15:18:55 +1000966 return (utmp_perform_logout(li));
andre2ff7b5d2000-06-03 14:57:40 +0000967
968 default:
Damien Miller6b0279c2004-09-12 15:25:17 +1000969 logit("%s: invalid type field", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +1000970 return (0);
andre2ff7b5d2000-06-03 14:57:40 +0000971 }
andre61e67252000-06-04 17:07:49 +0000972}
Damien Millerdd47aa22000-06-27 11:18:27 +1000973#endif /* USE_UTMP */
andre2ff7b5d2000-06-03 14:57:40 +0000974
975
976/**
andre61e67252000-06-04 17:07:49 +0000977 ** Low-level utmpx functions
andre2ff7b5d2000-06-03 14:57:40 +0000978 **/
979
980/* not much point if we don't want utmpx entries */
981#ifdef USE_UTMPX
982
andre2ff7b5d2000-06-03 14:57:40 +0000983/* if we have the wherewithall, use pututxline etc. */
Damien Millerdd47aa22000-06-27 11:18:27 +1000984# if !defined(DISABLE_PUTUTXLINE) && defined(HAVE_SETUTXENT) && \
985 defined(HAVE_PUTUTXLINE)
andre2ff7b5d2000-06-03 14:57:40 +0000986# define UTMPX_USE_LIBRARY
Damien Millerdd47aa22000-06-27 11:18:27 +1000987# endif
andre2ff7b5d2000-06-03 14:57:40 +0000988
989
990/* write a utmpx entry with the system's help (pututxline() and pals) */
Damien Millerdd47aa22000-06-27 11:18:27 +1000991# ifdef UTMPX_USE_LIBRARY
andre2ff7b5d2000-06-03 14:57:40 +0000992static int
andre61e67252000-06-04 17:07:49 +0000993utmpx_write_library(struct logininfo *li, struct utmpx *utx)
994{
andre2ff7b5d2000-06-03 14:57:40 +0000995 setutxent();
996 pututxline(utx);
997
Damien Millerdd47aa22000-06-27 11:18:27 +1000998# ifdef HAVE_ENDUTXENT
andre2ff7b5d2000-06-03 14:57:40 +0000999 endutxent();
Damien Millerdd47aa22000-06-27 11:18:27 +10001000# endif
Damien Miller8899ed32004-09-12 15:18:55 +10001001 return (1);
andre61e67252000-06-04 17:07:49 +00001002}
andre2ff7b5d2000-06-03 14:57:40 +00001003
Damien Millerdd47aa22000-06-27 11:18:27 +10001004# else /* UTMPX_USE_LIBRARY */
andre2ff7b5d2000-06-03 14:57:40 +00001005
1006/* write a utmp entry direct to the file */
1007static int
andre61e67252000-06-04 17:07:49 +00001008utmpx_write_direct(struct logininfo *li, struct utmpx *utx)
Kevin Stevesef4eea92001-02-05 12:42:17 +00001009{
Damien Miller6b0279c2004-09-12 15:25:17 +10001010 logit("%s: not implemented!", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001011 return (0);
andre61e67252000-06-04 17:07:49 +00001012}
Damien Millerdd47aa22000-06-27 11:18:27 +10001013# endif /* UTMPX_USE_LIBRARY */
andre2ff7b5d2000-06-03 14:57:40 +00001014
1015static int
andre61e67252000-06-04 17:07:49 +00001016utmpx_perform_login(struct logininfo *li)
1017{
andre2ff7b5d2000-06-03 14:57:40 +00001018 struct utmpx utx;
1019
1020 construct_utmpx(li, &utx);
Damien Millerdd47aa22000-06-27 11:18:27 +10001021# ifdef UTMPX_USE_LIBRARY
andre2ff7b5d2000-06-03 14:57:40 +00001022 if (!utmpx_write_library(li, &utx)) {
Damien Miller6b0279c2004-09-12 15:25:17 +10001023 logit("%s: utmp_write_library() failed", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001024 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001025 }
Damien Millerdd47aa22000-06-27 11:18:27 +10001026# else
andre2ff7b5d2000-06-03 14:57:40 +00001027 if (!utmpx_write_direct(li, &ut)) {
Damien Miller6b0279c2004-09-12 15:25:17 +10001028 logit("%s: utmp_write_direct() failed", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001029 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001030 }
Damien Millerdd47aa22000-06-27 11:18:27 +10001031# endif
Damien Miller8899ed32004-09-12 15:18:55 +10001032 return (1);
andre61e67252000-06-04 17:07:49 +00001033}
andre2ff7b5d2000-06-03 14:57:40 +00001034
1035
1036static int
andre61e67252000-06-04 17:07:49 +00001037utmpx_perform_logout(struct logininfo *li)
1038{
andre2ff7b5d2000-06-03 14:57:40 +00001039 struct utmpx utx;
1040
Tim Ricee06ae4a2002-02-24 17:56:46 -08001041 construct_utmpx(li, &utx);
Damien Millerdd47aa22000-06-27 11:18:27 +10001042# ifdef HAVE_ID_IN_UTMPX
andre2ff7b5d2000-06-03 14:57:40 +00001043 line_abbrevname(utx.ut_id, li->line, sizeof(utx.ut_id));
Damien Millerdd47aa22000-06-27 11:18:27 +10001044# endif
1045# ifdef HAVE_TYPE_IN_UTMPX
andre2ff7b5d2000-06-03 14:57:40 +00001046 utx.ut_type = DEAD_PROCESS;
Damien Millerdd47aa22000-06-27 11:18:27 +10001047# endif
andre2ff7b5d2000-06-03 14:57:40 +00001048
Damien Millerdd47aa22000-06-27 11:18:27 +10001049# ifdef UTMPX_USE_LIBRARY
andre2ff7b5d2000-06-03 14:57:40 +00001050 utmpx_write_library(li, &utx);
Damien Millerdd47aa22000-06-27 11:18:27 +10001051# else
andre2ff7b5d2000-06-03 14:57:40 +00001052 utmpx_write_direct(li, &utx);
Damien Millerdd47aa22000-06-27 11:18:27 +10001053# endif
Damien Miller8899ed32004-09-12 15:18:55 +10001054 return (1);
andre61e67252000-06-04 17:07:49 +00001055}
andre2ff7b5d2000-06-03 14:57:40 +00001056
andre2ff7b5d2000-06-03 14:57:40 +00001057int
andre61e67252000-06-04 17:07:49 +00001058utmpx_write_entry(struct logininfo *li)
1059{
andre2ff7b5d2000-06-03 14:57:40 +00001060 switch(li->type) {
1061 case LTYPE_LOGIN:
Damien Miller8899ed32004-09-12 15:18:55 +10001062 return (utmpx_perform_login(li));
andre2ff7b5d2000-06-03 14:57:40 +00001063 case LTYPE_LOGOUT:
Damien Miller8899ed32004-09-12 15:18:55 +10001064 return (utmpx_perform_logout(li));
andre2ff7b5d2000-06-03 14:57:40 +00001065 default:
Damien Miller6b0279c2004-09-12 15:25:17 +10001066 logit("%s: invalid type field", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001067 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001068 }
andre61e67252000-06-04 17:07:49 +00001069}
Damien Millerdd47aa22000-06-27 11:18:27 +10001070#endif /* USE_UTMPX */
andre2ff7b5d2000-06-03 14:57:40 +00001071
1072
1073/**
andre61e67252000-06-04 17:07:49 +00001074 ** Low-level wtmp functions
andre2ff7b5d2000-06-03 14:57:40 +00001075 **/
1076
Kevin Stevesef4eea92001-02-05 12:42:17 +00001077#ifdef USE_WTMP
andre2ff7b5d2000-06-03 14:57:40 +00001078
Damien Miller94cf4c82005-07-17 17:04:47 +10001079/*
Damien Miller8899ed32004-09-12 15:18:55 +10001080 * Write a wtmp entry direct to the end of the file
1081 * This is a slight modification of code in OpenBSD's logwtmp.c
1082 */
andre2ff7b5d2000-06-03 14:57:40 +00001083static int
andre61e67252000-06-04 17:07:49 +00001084wtmp_write(struct logininfo *li, struct utmp *ut)
1085{
andre2ff7b5d2000-06-03 14:57:40 +00001086 struct stat buf;
1087 int fd, ret = 1;
1088
1089 if ((fd = open(WTMP_FILE, O_WRONLY|O_APPEND, 0)) < 0) {
Damien Miller6b0279c2004-09-12 15:25:17 +10001090 logit("%s: problem writing %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001091 WTMP_FILE, strerror(errno));
Damien Miller8899ed32004-09-12 15:18:55 +10001092 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001093 }
Kevin Stevesef4eea92001-02-05 12:42:17 +00001094 if (fstat(fd, &buf) == 0)
Darren Tucker8661b562003-07-06 15:20:46 +10001095 if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) {
andre2ff7b5d2000-06-03 14:57:40 +00001096 ftruncate(fd, buf.st_size);
Damien Miller6b0279c2004-09-12 15:25:17 +10001097 logit("%s: problem writing %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001098 WTMP_FILE, strerror(errno));
1099 ret = 0;
1100 }
Damien Miller8899ed32004-09-12 15:18:55 +10001101 close(fd);
1102 return (ret);
andre61e67252000-06-04 17:07:49 +00001103}
andre2ff7b5d2000-06-03 14:57:40 +00001104
andre2ff7b5d2000-06-03 14:57:40 +00001105static int
Damien Millerdd47aa22000-06-27 11:18:27 +10001106wtmp_perform_login(struct logininfo *li)
1107{
andre2ff7b5d2000-06-03 14:57:40 +00001108 struct utmp ut;
1109
1110 construct_utmp(li, &ut);
Damien Miller8899ed32004-09-12 15:18:55 +10001111 return (wtmp_write(li, &ut));
andre61e67252000-06-04 17:07:49 +00001112}
andre2ff7b5d2000-06-03 14:57:40 +00001113
1114
1115static int
andre61e67252000-06-04 17:07:49 +00001116wtmp_perform_logout(struct logininfo *li)
1117{
andre2ff7b5d2000-06-03 14:57:40 +00001118 struct utmp ut;
1119
1120 construct_utmp(li, &ut);
Damien Miller8899ed32004-09-12 15:18:55 +10001121 return (wtmp_write(li, &ut));
andre61e67252000-06-04 17:07:49 +00001122}
andre2ff7b5d2000-06-03 14:57:40 +00001123
1124
1125int
andre61e67252000-06-04 17:07:49 +00001126wtmp_write_entry(struct logininfo *li)
1127{
andre2ff7b5d2000-06-03 14:57:40 +00001128 switch(li->type) {
1129 case LTYPE_LOGIN:
Damien Miller8899ed32004-09-12 15:18:55 +10001130 return (wtmp_perform_login(li));
andre2ff7b5d2000-06-03 14:57:40 +00001131 case LTYPE_LOGOUT:
Damien Miller8899ed32004-09-12 15:18:55 +10001132 return (wtmp_perform_logout(li));
andre2ff7b5d2000-06-03 14:57:40 +00001133 default:
Damien Miller6b0279c2004-09-12 15:25:17 +10001134 logit("%s: invalid type field", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001135 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001136 }
andre61e67252000-06-04 17:07:49 +00001137}
andre2ff7b5d2000-06-03 14:57:40 +00001138
1139
Damien Miller94cf4c82005-07-17 17:04:47 +10001140/*
Damien Miller8899ed32004-09-12 15:18:55 +10001141 * Notes on fetching login data from wtmp/wtmpx
Kevin Stevesef4eea92001-02-05 12:42:17 +00001142 *
andre6bb92372000-06-19 08:20:03 +00001143 * Logouts are usually recorded with (amongst other things) a blank
1144 * username on a given tty line. However, some systems (HP-UX is one)
1145 * leave all fields set, but change the ut_type field to DEAD_PROCESS.
1146 *
1147 * Since we're only looking for logins here, we know that the username
1148 * must be set correctly. On systems that leave it in, we check for
1149 * ut_type==USER_PROCESS (indicating a login.)
1150 *
1151 * Portability: Some systems may set something other than USER_PROCESS
1152 * to indicate a login process. I don't know of any as I write. Also,
1153 * it's possible that some systems may both leave the username in
1154 * place and not have ut_type.
1155 */
1156
andre6bb92372000-06-19 08:20:03 +00001157/* return true if this wtmp entry indicates a login */
1158static int
1159wtmp_islogin(struct logininfo *li, struct utmp *ut)
1160{
Kevin Stevesef4eea92001-02-05 12:42:17 +00001161 if (strncmp(li->username, ut->ut_name,
Damien Miller8899ed32004-09-12 15:18:55 +10001162 MIN_SIZEOF(li->username, ut->ut_name)) == 0) {
Damien Millerdd47aa22000-06-27 11:18:27 +10001163# ifdef HAVE_TYPE_IN_UTMP
andre6bb92372000-06-19 08:20:03 +00001164 if (ut->ut_type & USER_PROCESS)
Damien Miller8899ed32004-09-12 15:18:55 +10001165 return (1);
Damien Millerdd47aa22000-06-27 11:18:27 +10001166# else
Damien Miller8899ed32004-09-12 15:18:55 +10001167 return (1);
Damien Millerdd47aa22000-06-27 11:18:27 +10001168# endif
andre6bb92372000-06-19 08:20:03 +00001169 }
Damien Miller8899ed32004-09-12 15:18:55 +10001170 return (0);
andre6bb92372000-06-19 08:20:03 +00001171}
1172
andre2ff7b5d2000-06-03 14:57:40 +00001173int
andre61e67252000-06-04 17:07:49 +00001174wtmp_get_entry(struct logininfo *li)
1175{
andre2ff7b5d2000-06-03 14:57:40 +00001176 struct stat st;
1177 struct utmp ut;
Damien Miller8899ed32004-09-12 15:18:55 +10001178 int fd, found = 0;
andre6bb92372000-06-19 08:20:03 +00001179
1180 /* Clear the time entries in our logininfo */
1181 li->tv_sec = li->tv_usec = 0;
andre2ff7b5d2000-06-03 14:57:40 +00001182
1183 if ((fd = open(WTMP_FILE, O_RDONLY)) < 0) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001184 logit("%s: problem opening %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001185 WTMP_FILE, strerror(errno));
Damien Miller8899ed32004-09-12 15:18:55 +10001186 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001187 }
Kevin Stevesef4eea92001-02-05 12:42:17 +00001188 if (fstat(fd, &st) != 0) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001189 logit("%s: couldn't stat %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001190 WTMP_FILE, strerror(errno));
1191 close(fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001192 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001193 }
andre2ff7b5d2000-06-03 14:57:40 +00001194
andre6bb92372000-06-19 08:20:03 +00001195 /* Seek to the start of the last struct utmp */
Kevin Steves52172652001-10-02 00:29:00 +00001196 if (lseek(fd, -(off_t)sizeof(struct utmp), SEEK_END) == -1) {
andre6bb92372000-06-19 08:20:03 +00001197 /* Looks like we've got a fresh wtmp file */
1198 close(fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001199 return (0);
andre6bb92372000-06-19 08:20:03 +00001200 }
1201
1202 while (!found) {
Damien Miller53c5d462000-06-28 00:50:50 +10001203 if (atomicio(read, fd, &ut, sizeof(ut)) != sizeof(ut)) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001204 logit("%s: read of %s failed: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001205 WTMP_FILE, strerror(errno));
1206 close (fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001207 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001208 }
andre6bb92372000-06-19 08:20:03 +00001209 if ( wtmp_islogin(li, &ut) ) {
1210 found = 1;
Damien Miller8899ed32004-09-12 15:18:55 +10001211 /*
1212 * We've already checked for a time in struct
1213 * utmp, in login_getlast()
1214 */
Damien Millerdd47aa22000-06-27 11:18:27 +10001215# ifdef HAVE_TIME_IN_UTMP
andre2ff7b5d2000-06-03 14:57:40 +00001216 li->tv_sec = ut.ut_time;
Damien Millerdd47aa22000-06-27 11:18:27 +10001217# else
andre2ff7b5d2000-06-03 14:57:40 +00001218# if HAVE_TV_IN_UTMP
1219 li->tv_sec = ut.ut_tv.tv_sec;
1220# endif
Damien Millerdd47aa22000-06-27 11:18:27 +10001221# endif
andre6bb92372000-06-19 08:20:03 +00001222 line_fullname(li->line, ut.ut_line,
Damien Miller8899ed32004-09-12 15:18:55 +10001223 MIN_SIZEOF(li->line, ut.ut_line));
Damien Millerdd47aa22000-06-27 11:18:27 +10001224# ifdef HAVE_HOST_IN_UTMP
andre6bb92372000-06-19 08:20:03 +00001225 strlcpy(li->hostname, ut.ut_host,
Damien Miller8899ed32004-09-12 15:18:55 +10001226 MIN_SIZEOF(li->hostname, ut.ut_host));
Damien Millerdd47aa22000-06-27 11:18:27 +10001227# endif
andre6bb92372000-06-19 08:20:03 +00001228 continue;
andre2ff7b5d2000-06-03 14:57:40 +00001229 }
andre6bb92372000-06-19 08:20:03 +00001230 /* Seek back 2 x struct utmp */
Kevin Steves52172652001-10-02 00:29:00 +00001231 if (lseek(fd, -(off_t)(2 * sizeof(struct utmp)), SEEK_CUR) == -1) {
andre6bb92372000-06-19 08:20:03 +00001232 /* We've found the start of the file, so quit */
Damien Miller8899ed32004-09-12 15:18:55 +10001233 close(fd);
1234 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001235 }
andre6bb92372000-06-19 08:20:03 +00001236 }
1237
1238 /* We found an entry. Tidy up and return */
1239 close(fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001240 return (1);
andre61e67252000-06-04 17:07:49 +00001241}
Damien Millerdd47aa22000-06-27 11:18:27 +10001242# endif /* USE_WTMP */
andre2ff7b5d2000-06-03 14:57:40 +00001243
1244
1245/**
andre61e67252000-06-04 17:07:49 +00001246 ** Low-level wtmpx functions
andre2ff7b5d2000-06-03 14:57:40 +00001247 **/
1248
1249#ifdef USE_WTMPX
Damien Miller8899ed32004-09-12 15:18:55 +10001250/*
1251 * Write a wtmpx entry direct to the end of the file
1252 * This is a slight modification of code in OpenBSD's logwtmp.c
1253 */
andre2ff7b5d2000-06-03 14:57:40 +00001254static int
andre61e67252000-06-04 17:07:49 +00001255wtmpx_write(struct logininfo *li, struct utmpx *utx)
1256{
Darren Tuckerc28b88a2004-02-10 16:49:35 +11001257#ifndef HAVE_UPDWTMPX
andre2ff7b5d2000-06-03 14:57:40 +00001258 struct stat buf;
1259 int fd, ret = 1;
1260
1261 if ((fd = open(WTMPX_FILE, O_WRONLY|O_APPEND, 0)) < 0) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001262 logit("%s: problem opening %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001263 WTMPX_FILE, strerror(errno));
Damien Miller8899ed32004-09-12 15:18:55 +10001264 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001265 }
1266
Kevin Stevesef4eea92001-02-05 12:42:17 +00001267 if (fstat(fd, &buf) == 0)
Darren Tucker8661b562003-07-06 15:20:46 +10001268 if (atomicio(vwrite, fd, utx, sizeof(*utx)) != sizeof(*utx)) {
andre2ff7b5d2000-06-03 14:57:40 +00001269 ftruncate(fd, buf.st_size);
Damien Miller6b0279c2004-09-12 15:25:17 +10001270 logit("%s: problem writing %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001271 WTMPX_FILE, strerror(errno));
1272 ret = 0;
1273 }
Damien Miller8899ed32004-09-12 15:18:55 +10001274 close(fd);
andre2ff7b5d2000-06-03 14:57:40 +00001275
Damien Miller8899ed32004-09-12 15:18:55 +10001276 return (ret);
Darren Tuckerc28b88a2004-02-10 16:49:35 +11001277#else
1278 updwtmpx(WTMPX_FILE, utx);
Damien Miller8899ed32004-09-12 15:18:55 +10001279 return (1);
Darren Tuckerc28b88a2004-02-10 16:49:35 +11001280#endif
andre61e67252000-06-04 17:07:49 +00001281}
andre2ff7b5d2000-06-03 14:57:40 +00001282
1283
1284static int
andre61e67252000-06-04 17:07:49 +00001285wtmpx_perform_login(struct logininfo *li)
1286{
andre2ff7b5d2000-06-03 14:57:40 +00001287 struct utmpx utx;
1288
1289 construct_utmpx(li, &utx);
Damien Miller8899ed32004-09-12 15:18:55 +10001290 return (wtmpx_write(li, &utx));
andre61e67252000-06-04 17:07:49 +00001291}
andre2ff7b5d2000-06-03 14:57:40 +00001292
1293
1294static int
andre61e67252000-06-04 17:07:49 +00001295wtmpx_perform_logout(struct logininfo *li)
1296{
andre2ff7b5d2000-06-03 14:57:40 +00001297 struct utmpx utx;
1298
1299 construct_utmpx(li, &utx);
Damien Miller8899ed32004-09-12 15:18:55 +10001300 return (wtmpx_write(li, &utx));
andre61e67252000-06-04 17:07:49 +00001301}
andre2ff7b5d2000-06-03 14:57:40 +00001302
1303
1304int
andre61e67252000-06-04 17:07:49 +00001305wtmpx_write_entry(struct logininfo *li)
1306{
andre2ff7b5d2000-06-03 14:57:40 +00001307 switch(li->type) {
1308 case LTYPE_LOGIN:
Damien Miller8899ed32004-09-12 15:18:55 +10001309 return (wtmpx_perform_login(li));
andre2ff7b5d2000-06-03 14:57:40 +00001310 case LTYPE_LOGOUT:
Damien Miller8899ed32004-09-12 15:18:55 +10001311 return (wtmpx_perform_logout(li));
andre2ff7b5d2000-06-03 14:57:40 +00001312 default:
Damien Miller6b0279c2004-09-12 15:25:17 +10001313 logit("%s: invalid type field", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001314 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001315 }
andre61e67252000-06-04 17:07:49 +00001316}
andre2ff7b5d2000-06-03 14:57:40 +00001317
andre6bb92372000-06-19 08:20:03 +00001318/* Please see the notes above wtmp_islogin() for information about the
1319 next two functions */
1320
1321/* Return true if this wtmpx entry indicates a login */
1322static int
1323wtmpx_islogin(struct logininfo *li, struct utmpx *utx)
1324{
Darren Tucker0b8a2262010-01-09 18:18:04 +11001325 if (strncmp(li->username, utx->ut_user,
1326 MIN_SIZEOF(li->username, utx->ut_user)) == 0 ) {
Damien Millerdd47aa22000-06-27 11:18:27 +10001327# ifdef HAVE_TYPE_IN_UTMPX
andre6bb92372000-06-19 08:20:03 +00001328 if (utx->ut_type == USER_PROCESS)
Damien Miller8899ed32004-09-12 15:18:55 +10001329 return (1);
Damien Millerdd47aa22000-06-27 11:18:27 +10001330# else
Damien Miller8899ed32004-09-12 15:18:55 +10001331 return (1);
Damien Millerdd47aa22000-06-27 11:18:27 +10001332# endif
andre6bb92372000-06-19 08:20:03 +00001333 }
Damien Miller8899ed32004-09-12 15:18:55 +10001334 return (0);
andre6bb92372000-06-19 08:20:03 +00001335}
1336
andre2ff7b5d2000-06-03 14:57:40 +00001337
1338int
andre61e67252000-06-04 17:07:49 +00001339wtmpx_get_entry(struct logininfo *li)
1340{
andre2ff7b5d2000-06-03 14:57:40 +00001341 struct stat st;
1342 struct utmpx utx;
andre6bb92372000-06-19 08:20:03 +00001343 int fd, found=0;
1344
1345 /* Clear the time entries */
1346 li->tv_sec = li->tv_usec = 0;
andre2ff7b5d2000-06-03 14:57:40 +00001347
1348 if ((fd = open(WTMPX_FILE, O_RDONLY)) < 0) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001349 logit("%s: problem opening %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001350 WTMPX_FILE, strerror(errno));
Damien Miller8899ed32004-09-12 15:18:55 +10001351 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001352 }
Kevin Stevesef4eea92001-02-05 12:42:17 +00001353 if (fstat(fd, &st) != 0) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001354 logit("%s: couldn't stat %s: %s", __func__,
Tim Ricecdb82942002-07-14 15:33:20 -07001355 WTMPX_FILE, strerror(errno));
andre2ff7b5d2000-06-03 14:57:40 +00001356 close(fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001357 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001358 }
Kevin Stevesef4eea92001-02-05 12:42:17 +00001359
andre6bb92372000-06-19 08:20:03 +00001360 /* Seek to the start of the last struct utmpx */
Kevin Steves52172652001-10-02 00:29:00 +00001361 if (lseek(fd, -(off_t)sizeof(struct utmpx), SEEK_END) == -1 ) {
andre6bb92372000-06-19 08:20:03 +00001362 /* probably a newly rotated wtmpx file */
1363 close(fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001364 return (0);
andre6bb92372000-06-19 08:20:03 +00001365 }
andre2ff7b5d2000-06-03 14:57:40 +00001366
andre6bb92372000-06-19 08:20:03 +00001367 while (!found) {
Damien Miller53c5d462000-06-28 00:50:50 +10001368 if (atomicio(read, fd, &utx, sizeof(utx)) != sizeof(utx)) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001369 logit("%s: read of %s failed: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001370 WTMPX_FILE, strerror(errno));
1371 close (fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001372 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001373 }
Damien Miller8899ed32004-09-12 15:18:55 +10001374 /*
Damien Miller94cf4c82005-07-17 17:04:47 +10001375 * Logouts are recorded as a blank username on a particular
Damien Miller8899ed32004-09-12 15:18:55 +10001376 * line. So, we just need to find the username in struct utmpx
1377 */
1378 if (wtmpx_islogin(li, &utx)) {
Tim Rice370e0ba2002-07-14 15:50:51 -07001379 found = 1;
Damien Miller8899ed32004-09-12 15:18:55 +10001380# if defined(HAVE_TV_IN_UTMPX)
andre2ff7b5d2000-06-03 14:57:40 +00001381 li->tv_sec = utx.ut_tv.tv_sec;
Damien Miller8899ed32004-09-12 15:18:55 +10001382# elif defined(HAVE_TIME_IN_UTMPX)
andre2ff7b5d2000-06-03 14:57:40 +00001383 li->tv_sec = utx.ut_time;
Damien Millerdd47aa22000-06-27 11:18:27 +10001384# endif
Damien Miller1a132252000-06-13 21:23:17 +10001385 line_fullname(li->line, utx.ut_line, sizeof(li->line));
Damien Miller8899ed32004-09-12 15:18:55 +10001386# if defined(HAVE_HOST_IN_UTMPX)
andre6bb92372000-06-19 08:20:03 +00001387 strlcpy(li->hostname, utx.ut_host,
Damien Miller8899ed32004-09-12 15:18:55 +10001388 MIN_SIZEOF(li->hostname, utx.ut_host));
Damien Millerdd47aa22000-06-27 11:18:27 +10001389# endif
andre6bb92372000-06-19 08:20:03 +00001390 continue;
andre2ff7b5d2000-06-03 14:57:40 +00001391 }
Kevin Steves52172652001-10-02 00:29:00 +00001392 if (lseek(fd, -(off_t)(2 * sizeof(struct utmpx)), SEEK_CUR) == -1) {
Damien Miller8899ed32004-09-12 15:18:55 +10001393 close(fd);
1394 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001395 }
andre6bb92372000-06-19 08:20:03 +00001396 }
1397
1398 close(fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001399 return (1);
andre61e67252000-06-04 17:07:49 +00001400}
Damien Millerd5bf3072000-06-07 21:32:13 +10001401#endif /* USE_WTMPX */
andre2ff7b5d2000-06-03 14:57:40 +00001402
andre2ff7b5d2000-06-03 14:57:40 +00001403/**
andre61e67252000-06-04 17:07:49 +00001404 ** Low-level libutil login() functions
andre2ff7b5d2000-06-03 14:57:40 +00001405 **/
1406
1407#ifdef USE_LOGIN
andre2ff7b5d2000-06-03 14:57:40 +00001408static int
andre61e67252000-06-04 17:07:49 +00001409syslogin_perform_login(struct logininfo *li)
1410{
andre2ff7b5d2000-06-03 14:57:40 +00001411 struct utmp *ut;
1412
Damien Millerb0aae332004-09-12 15:26:00 +10001413 ut = xmalloc(sizeof(*ut));
andre2ff7b5d2000-06-03 14:57:40 +00001414 construct_utmp(li, ut);
1415 login(ut);
Damien Millerf211efc2003-03-10 11:23:06 +11001416 free(ut);
andre2ff7b5d2000-06-03 14:57:40 +00001417
Damien Miller8899ed32004-09-12 15:18:55 +10001418 return (1);
andre61e67252000-06-04 17:07:49 +00001419}
1420
andre2ff7b5d2000-06-03 14:57:40 +00001421static int
andre61e67252000-06-04 17:07:49 +00001422syslogin_perform_logout(struct logininfo *li)
1423{
Damien Millerdd47aa22000-06-27 11:18:27 +10001424# ifdef HAVE_LOGOUT
Darren Tucker4d2f3612004-04-08 10:57:05 +10001425 char line[UT_LINESIZE];
Kevin Stevesef4eea92001-02-05 12:42:17 +00001426
andre2ff7b5d2000-06-03 14:57:40 +00001427 (void)line_stripname(line, li->line, sizeof(line));
1428
Damien Miller8899ed32004-09-12 15:18:55 +10001429 if (!logout(line))
Damien Miller6b0279c2004-09-12 15:25:17 +10001430 logit("%s: logout() returned an error", __func__);
Damien Millerdd47aa22000-06-27 11:18:27 +10001431# ifdef HAVE_LOGWTMP
Damien Miller8899ed32004-09-12 15:18:55 +10001432 else
andre2ff7b5d2000-06-03 14:57:40 +00001433 logwtmp(line, "", "");
Damien Millerdd47aa22000-06-27 11:18:27 +10001434# endif
andre6bb92372000-06-19 08:20:03 +00001435 /* FIXME: (ATL - if the need arises) What to do if we have
1436 * login, but no logout? what if logout but no logwtmp? All
1437 * routines are in libutil so they should all be there,
1438 * but... */
Damien Millerdd47aa22000-06-27 11:18:27 +10001439# endif
Damien Miller8899ed32004-09-12 15:18:55 +10001440 return (1);
andre61e67252000-06-04 17:07:49 +00001441}
andre2ff7b5d2000-06-03 14:57:40 +00001442
andre2ff7b5d2000-06-03 14:57:40 +00001443int
andre61e67252000-06-04 17:07:49 +00001444syslogin_write_entry(struct logininfo *li)
1445{
andre2ff7b5d2000-06-03 14:57:40 +00001446 switch (li->type) {
1447 case LTYPE_LOGIN:
Damien Miller8899ed32004-09-12 15:18:55 +10001448 return (syslogin_perform_login(li));
andre2ff7b5d2000-06-03 14:57:40 +00001449 case LTYPE_LOGOUT:
Damien Miller8899ed32004-09-12 15:18:55 +10001450 return (syslogin_perform_logout(li));
andre2ff7b5d2000-06-03 14:57:40 +00001451 default:
Damien Miller6b0279c2004-09-12 15:25:17 +10001452 logit("%s: Invalid type field", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001453 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001454 }
andre61e67252000-06-04 17:07:49 +00001455}
Damien Millerd5bf3072000-06-07 21:32:13 +10001456#endif /* USE_LOGIN */
andre2ff7b5d2000-06-03 14:57:40 +00001457
1458/* end of file log-syslogin.c */
1459
andre2ff7b5d2000-06-03 14:57:40 +00001460/**
andre61e67252000-06-04 17:07:49 +00001461 ** Low-level lastlog functions
andre2ff7b5d2000-06-03 14:57:40 +00001462 **/
1463
1464#ifdef USE_LASTLOG
1465
Damien Miller20e231f2009-02-12 13:12:21 +11001466#if !defined(LASTLOG_WRITE_PUTUTXLINE) || !defined(HAVE_GETLASTLOGXBYNAME)
1467/* open the file (using filemode) and seek to the login entry */
andre2ff7b5d2000-06-03 14:57:40 +00001468static int
Damien Miller20e231f2009-02-12 13:12:21 +11001469lastlog_openseek(struct logininfo *li, int *fd, int filemode)
andre61e67252000-06-04 17:07:49 +00001470{
Damien Miller20e231f2009-02-12 13:12:21 +11001471 off_t offset;
1472 char lastlog_file[1024];
andre2ff7b5d2000-06-03 14:57:40 +00001473 struct stat st;
1474
Damien Millerdd47aa22000-06-27 11:18:27 +10001475 if (stat(LASTLOG_FILE, &st) != 0) {
Damien Miller6b0279c2004-09-12 15:25:17 +10001476 logit("%s: Couldn't stat %s: %s", __func__,
Damien Miller8899ed32004-09-12 15:18:55 +10001477 LASTLOG_FILE, strerror(errno));
1478 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001479 }
Damien Miller20e231f2009-02-12 13:12:21 +11001480 if (S_ISDIR(st.st_mode)) {
Damien Miller8899ed32004-09-12 15:18:55 +10001481 snprintf(lastlog_file, sizeof(lastlog_file), "%s/%s",
1482 LASTLOG_FILE, li->username);
Damien Miller20e231f2009-02-12 13:12:21 +11001483 } else if (S_ISREG(st.st_mode)) {
1484 strlcpy(lastlog_file, LASTLOG_FILE, sizeof(lastlog_file));
1485 } else {
Damien Miller6b0279c2004-09-12 15:25:17 +10001486 logit("%s: %.100s is not a file or directory!", __func__,
Damien Miller8899ed32004-09-12 15:18:55 +10001487 LASTLOG_FILE);
1488 return (0);
Damien Millerdd47aa22000-06-27 11:18:27 +10001489 }
andre2ff7b5d2000-06-03 14:57:40 +00001490
Damien Miller405dc602003-04-09 21:12:52 +10001491 *fd = open(lastlog_file, filemode, 0600);
Damien Miller8899ed32004-09-12 15:18:55 +10001492 if (*fd < 0) {
Damien Miller6b0279c2004-09-12 15:25:17 +10001493 debug("%s: Couldn't open %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001494 lastlog_file, strerror(errno));
Damien Miller8899ed32004-09-12 15:18:55 +10001495 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001496 }
Kevin Stevesef4eea92001-02-05 12:42:17 +00001497
Damien Miller20e231f2009-02-12 13:12:21 +11001498 if (S_ISREG(st.st_mode)) {
Damien Millere477ef62000-08-15 10:21:17 +10001499 /* find this uid's offset in the lastlog file */
Damien Miller34ee4202010-11-05 10:52:37 +11001500 offset = (off_t) ((u_long)li->uid * sizeof(struct lastlog));
andre2ff7b5d2000-06-03 14:57:40 +00001501
Damien Miller8899ed32004-09-12 15:18:55 +10001502 if (lseek(*fd, offset, SEEK_SET) != offset) {
Damien Miller6b0279c2004-09-12 15:25:17 +10001503 logit("%s: %s->lseek(): %s", __func__,
1504 lastlog_file, strerror(errno));
Damien Miller8899ed32004-09-12 15:18:55 +10001505 return (0);
Damien Millere477ef62000-08-15 10:21:17 +10001506 }
andre2ff7b5d2000-06-03 14:57:40 +00001507 }
Kevin Stevesef4eea92001-02-05 12:42:17 +00001508
Damien Miller8899ed32004-09-12 15:18:55 +10001509 return (1);
andre61e67252000-06-04 17:07:49 +00001510}
Damien Miller20e231f2009-02-12 13:12:21 +11001511#endif /* !LASTLOG_WRITE_PUTUTXLINE || !HAVE_GETLASTLOGXBYNAME */
andre2ff7b5d2000-06-03 14:57:40 +00001512
Damien Miller20e231f2009-02-12 13:12:21 +11001513#ifdef LASTLOG_WRITE_PUTUTXLINE
andre2ff7b5d2000-06-03 14:57:40 +00001514int
andre61e67252000-06-04 17:07:49 +00001515lastlog_write_entry(struct logininfo *li)
1516{
andre2ff7b5d2000-06-03 14:57:40 +00001517 switch(li->type) {
1518 case LTYPE_LOGIN:
Damien Miller20e231f2009-02-12 13:12:21 +11001519 return 1; /* lastlog written by pututxline */
1520 default:
1521 logit("lastlog_write_entry: Invalid type field");
1522 return 0;
1523 }
1524}
1525#else /* LASTLOG_WRITE_PUTUTXLINE */
1526int
1527lastlog_write_entry(struct logininfo *li)
1528{
1529 struct lastlog last;
1530 int fd;
1531
1532 switch(li->type) {
1533 case LTYPE_LOGIN:
1534 /* create our struct lastlog */
1535 memset(&last, '\0', sizeof(last));
1536 line_stripname(last.ll_line, li->line, sizeof(last.ll_line));
1537 strlcpy(last.ll_host, li->hostname,
1538 MIN_SIZEOF(last.ll_host, li->hostname));
1539 last.ll_time = li->tv_sec;
1540
1541 if (!lastlog_openseek(li, &fd, O_RDWR|O_CREAT))
1542 return (0);
1543
1544 /* write the entry */
1545 if (atomicio(vwrite, fd, &last, sizeof(last)) != sizeof(last)) {
1546 close(fd);
1547 logit("%s: Error writing to %s: %s", __func__,
1548 LASTLOG_FILE, strerror(errno));
1549 return (0);
1550 }
1551
1552 close(fd);
1553 return (1);
andre2ff7b5d2000-06-03 14:57:40 +00001554 default:
Damien Miller6b0279c2004-09-12 15:25:17 +10001555 logit("%s: Invalid type field", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001556 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001557 }
andre61e67252000-06-04 17:07:49 +00001558}
Damien Miller20e231f2009-02-12 13:12:21 +11001559#endif /* LASTLOG_WRITE_PUTUTXLINE */
andre2ff7b5d2000-06-03 14:57:40 +00001560
Damien Miller20e231f2009-02-12 13:12:21 +11001561#ifdef HAVE_GETLASTLOGXBYNAME
1562int
1563lastlog_get_entry(struct logininfo *li)
andre61e67252000-06-04 17:07:49 +00001564{
Damien Miller20e231f2009-02-12 13:12:21 +11001565 struct lastlogx l, *ll;
andre2ff7b5d2000-06-03 14:57:40 +00001566
Damien Miller20e231f2009-02-12 13:12:21 +11001567 if ((ll = getlastlogxbyname(li->username, &l)) == NULL) {
1568 memset(&l, '\0', sizeof(l));
1569 ll = &l;
1570 }
1571 line_fullname(li->line, ll->ll_line, sizeof(li->line));
1572 strlcpy(li->hostname, ll->ll_host,
1573 MIN_SIZEOF(li->hostname, ll->ll_host));
1574 li->tv_sec = ll->ll_tv.tv_sec;
1575 li->tv_usec = ll->ll_tv.tv_usec;
1576 return (1);
1577}
1578#else /* HAVE_GETLASTLOGXBYNAME */
andre2ff7b5d2000-06-03 14:57:40 +00001579int
andre61e67252000-06-04 17:07:49 +00001580lastlog_get_entry(struct logininfo *li)
1581{
andre2ff7b5d2000-06-03 14:57:40 +00001582 struct lastlog last;
Damien Miller7df881d2003-01-07 16:46:58 +11001583 int fd, ret;
andre2ff7b5d2000-06-03 14:57:40 +00001584
Damien Miller3a8a5cd2001-10-22 16:49:22 +10001585 if (!lastlog_openseek(li, &fd, O_RDONLY))
Damien Miller7df881d2003-01-07 16:46:58 +11001586 return (0);
Damien Miller3a8a5cd2001-10-22 16:49:22 +10001587
Damien Miller7df881d2003-01-07 16:46:58 +11001588 ret = atomicio(read, fd, &last, sizeof(last));
Damien Miller3a8a5cd2001-10-22 16:49:22 +10001589 close(fd);
1590
Damien Miller7df881d2003-01-07 16:46:58 +11001591 switch (ret) {
1592 case 0:
1593 memset(&last, '\0', sizeof(last));
1594 /* FALLTHRU */
1595 case sizeof(last):
Damien Miller20e231f2009-02-12 13:12:21 +11001596 line_fullname(li->line, last.ll_line, sizeof(li->line));
1597 strlcpy(li->hostname, last.ll_host,
1598 MIN_SIZEOF(li->hostname, last.ll_host));
1599 li->tv_sec = last.ll_time;
Damien Miller7df881d2003-01-07 16:46:58 +11001600 return (1);
1601 case -1:
Damien Millera8e06ce2003-11-21 23:48:55 +11001602 error("%s: Error reading from %s: %s", __func__,
Damien Miller7df881d2003-01-07 16:46:58 +11001603 LASTLOG_FILE, strerror(errno));
1604 return (0);
1605 default:
1606 error("%s: Error reading from %s: Expecting %d, got %d",
Darren Tuckerefc17472005-11-22 19:55:13 +11001607 __func__, LASTLOG_FILE, (int)sizeof(last), ret);
Damien Miller7df881d2003-01-07 16:46:58 +11001608 return (0);
1609 }
Damien Miller3a8a5cd2001-10-22 16:49:22 +10001610
Damien Miller7df881d2003-01-07 16:46:58 +11001611 /* NOTREACHED */
1612 return (0);
andre61e67252000-06-04 17:07:49 +00001613}
Damien Miller20e231f2009-02-12 13:12:21 +11001614#endif /* HAVE_GETLASTLOGXBYNAME */
Damien Millerd5bf3072000-06-07 21:32:13 +10001615#endif /* USE_LASTLOG */
Darren Tucker2fba9932005-02-02 23:30:24 +11001616
Darren Tucker261d93a2010-04-09 18:13:27 +10001617#if defined(USE_UTMPX) && defined(HAVE_SETUTXDB) && \
1618 defined(UTXDB_LASTLOGIN) && defined(HAVE_GETUTXUSER)
1619int
1620utmpx_get_entry(struct logininfo *li)
1621{
1622 struct utmpx *utx;
1623
1624 if (setutxdb(UTXDB_LASTLOGIN, NULL) != 0)
1625 return (0);
1626 utx = getutxuser(li->username);
1627 if (utx == NULL) {
1628 endutxent();
1629 return (0);
1630 }
1631
1632 line_fullname(li->line, utx->ut_line,
1633 MIN_SIZEOF(li->line, utx->ut_line));
1634 strlcpy(li->hostname, utx->ut_host,
1635 MIN_SIZEOF(li->hostname, utx->ut_host));
1636 li->tv_sec = utx->ut_tv.tv_sec;
1637 li->tv_usec = utx->ut_tv.tv_usec;
1638 endutxent();
1639 return (1);
1640}
1641#endif /* USE_UTMPX && HAVE_SETUTXDB && UTXDB_LASTLOGIN && HAVE_GETUTXUSER */
1642
Darren Tucker2fba9932005-02-02 23:30:24 +11001643#ifdef USE_BTMP
1644 /*
1645 * Logs failed login attempts in _PATH_BTMP if that exists.
1646 * The most common login failure is to give password instead of username.
1647 * So the _PATH_BTMP file checked for the correct permission, so that
1648 * only root can read it.
1649 */
1650
1651void
1652record_failed_login(const char *username, const char *hostname,
1653 const char *ttyn)
1654{
1655 int fd;
1656 struct utmp ut;
1657 struct sockaddr_storage from;
Darren Tuckerefc17472005-11-22 19:55:13 +11001658 socklen_t fromlen = sizeof(from);
Darren Tucker2fba9932005-02-02 23:30:24 +11001659 struct sockaddr_in *a4;
1660 struct sockaddr_in6 *a6;
1661 time_t t;
1662 struct stat fst;
1663
1664 if (geteuid() != 0)
1665 return;
1666 if ((fd = open(_PATH_BTMP, O_WRONLY | O_APPEND)) < 0) {
1667 debug("Unable to open the btmp file %s: %s", _PATH_BTMP,
1668 strerror(errno));
1669 return;
1670 }
1671 if (fstat(fd, &fst) < 0) {
1672 logit("%s: fstat of %s failed: %s", __func__, _PATH_BTMP,
1673 strerror(errno));
1674 goto out;
1675 }
Damien Miller88e341e2010-11-24 10:36:15 +11001676 if((fst.st_mode & (S_IXGRP | S_IRWXO)) || (fst.st_uid != 0)){
Darren Tucker2fba9932005-02-02 23:30:24 +11001677 logit("Excess permission or bad ownership on file %s",
1678 _PATH_BTMP);
1679 goto out;
1680 }
1681
1682 memset(&ut, 0, sizeof(ut));
1683 /* strncpy because we don't necessarily want nul termination */
1684 strncpy(ut.ut_user, username, sizeof(ut.ut_user));
1685 strlcpy(ut.ut_line, "ssh:notty", sizeof(ut.ut_line));
1686
1687 time(&t);
1688 ut.ut_time = t; /* ut_time is not always a time_t */
1689 ut.ut_type = LOGIN_PROCESS;
1690 ut.ut_pid = getpid();
1691
1692 /* strncpy because we don't necessarily want nul termination */
1693 strncpy(ut.ut_host, hostname, sizeof(ut.ut_host));
1694
1695 if (packet_connection_is_on_socket() &&
1696 getpeername(packet_get_connection_in(),
1697 (struct sockaddr *)&from, &fromlen) == 0) {
1698 ipv64_normalise_mapped(&from, &fromlen);
1699 if (from.ss_family == AF_INET) {
1700 a4 = (struct sockaddr_in *)&from;
1701 memcpy(&ut.ut_addr, &(a4->sin_addr),
1702 MIN_SIZEOF(ut.ut_addr, a4->sin_addr));
1703 }
1704#ifdef HAVE_ADDR_V6_IN_UTMP
1705 if (from.ss_family == AF_INET6) {
1706 a6 = (struct sockaddr_in6 *)&from;
1707 memcpy(&ut.ut_addr_v6, &(a6->sin6_addr),
1708 MIN_SIZEOF(ut.ut_addr_v6, a6->sin6_addr));
1709 }
1710#endif
1711 }
1712
1713 if (atomicio(vwrite, fd, &ut, sizeof(ut)) != sizeof(ut))
1714 error("Failed to write to %s: %s", _PATH_BTMP,
1715 strerror(errno));
1716
1717out:
1718 close(fd);
1719}
1720#endif /* USE_BTMP */