blob: 59e8a44eeeeb33368baf2623205f6810b6b88b27 [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
183/**
184 ** prototypes for helper functions in this file
185 **/
186
187#if HAVE_UTMP_H
andre2ff7b5d2000-06-03 14:57:40 +0000188void set_utmp_time(struct logininfo *li, struct utmp *ut);
189void construct_utmp(struct logininfo *li, struct utmp *ut);
190#endif
191
192#ifdef HAVE_UTMPX_H
andre2ff7b5d2000-06-03 14:57:40 +0000193void set_utmpx_time(struct logininfo *li, struct utmpx *ut);
194void construct_utmpx(struct logininfo *li, struct utmpx *ut);
195#endif
196
197int utmp_write_entry(struct logininfo *li);
198int utmpx_write_entry(struct logininfo *li);
199int wtmp_write_entry(struct logininfo *li);
200int wtmpx_write_entry(struct logininfo *li);
201int lastlog_write_entry(struct logininfo *li);
202int syslogin_write_entry(struct logininfo *li);
203
204int getlast_entry(struct logininfo *li);
205int lastlog_get_entry(struct logininfo *li);
Darren Tucker261d93a2010-04-09 18:13:27 +1000206int utmpx_get_entry(struct logininfo *li);
andre2ff7b5d2000-06-03 14:57:40 +0000207int wtmp_get_entry(struct logininfo *li);
208int wtmpx_get_entry(struct logininfo *li);
209
Darren Tucker691d5232005-02-15 21:45:57 +1100210extern Buffer loginmsg;
211
andre6bb92372000-06-19 08:20:03 +0000212/* pick the shortest string */
Damien Miller8899ed32004-09-12 15:18:55 +1000213#define MIN_SIZEOF(s1,s2) (sizeof(s1) < sizeof(s2) ? sizeof(s1) : sizeof(s2))
andre6bb92372000-06-19 08:20:03 +0000214
andre2ff7b5d2000-06-03 14:57:40 +0000215/**
216 ** platform-independent login functions
217 **/
218
Damien Miller8899ed32004-09-12 15:18:55 +1000219/*
220 * login_login(struct logininfo *) - Record a login
Kevin Stevesef4eea92001-02-05 12:42:17 +0000221 *
andre6bb92372000-06-19 08:20:03 +0000222 * Call with a pointer to a struct logininfo initialised with
223 * login_init_entry() or login_alloc_entry()
224 *
225 * Returns:
226 * >0 if successful
227 * 0 on failure (will use OpenSSH's logging facilities for diagnostics)
228 */
andre61e67252000-06-04 17:07:49 +0000229int
Damien Miller8899ed32004-09-12 15:18:55 +1000230login_login(struct logininfo *li)
andre61e67252000-06-04 17:07:49 +0000231{
232 li->type = LTYPE_LOGIN;
Damien Miller8899ed32004-09-12 15:18:55 +1000233 return (login_write(li));
andre61e67252000-06-04 17:07:49 +0000234}
235
236
Damien Miller8899ed32004-09-12 15:18:55 +1000237/*
238 * login_logout(struct logininfo *) - Record a logout
andre6bb92372000-06-19 08:20:03 +0000239 *
240 * Call as with login_login()
241 *
242 * Returns:
243 * >0 if successful
244 * 0 on failure (will use OpenSSH's logging facilities for diagnostics)
245 */
andre61e67252000-06-04 17:07:49 +0000246int
247login_logout(struct logininfo *li)
248{
249 li->type = LTYPE_LOGOUT;
Damien Miller8899ed32004-09-12 15:18:55 +1000250 return (login_write(li));
andre61e67252000-06-04 17:07:49 +0000251}
252
Damien Miller8899ed32004-09-12 15:18:55 +1000253/*
254 * login_get_lastlog_time(int) - Retrieve the last login time
andre6bb92372000-06-19 08:20:03 +0000255 *
256 * Retrieve the last login time for the given uid. Will try to use the
257 * system lastlog facilities if they are available, but will fall back
258 * to looking in wtmp/wtmpx if necessary
259 *
260 * Returns:
261 * 0 on failure, or if user has never logged in
262 * Time in seconds from the epoch if successful
263 *
264 * Useful preprocessor symbols:
265 * DISABLE_LASTLOG: If set, *never* even try to retrieve lastlog
266 * info
267 * USE_LASTLOG: If set, indicates the presence of system lastlog
268 * facilities. If this and DISABLE_LASTLOG are not set,
269 * try to retrieve lastlog information from wtmp/wtmpx.
270 */
andre61e67252000-06-04 17:07:49 +0000271unsigned int
Damien Miller34ee4202010-11-05 10:52:37 +1100272login_get_lastlog_time(const uid_t uid)
andre61e67252000-06-04 17:07:49 +0000273{
274 struct logininfo li;
275
andre6bb92372000-06-19 08:20:03 +0000276 if (login_get_lastlog(&li, uid))
Damien Miller8899ed32004-09-12 15:18:55 +1000277 return (li.tv_sec);
andre6bb92372000-06-19 08:20:03 +0000278 else
Damien Miller8899ed32004-09-12 15:18:55 +1000279 return (0);
andre61e67252000-06-04 17:07:49 +0000280}
281
Damien Miller8899ed32004-09-12 15:18:55 +1000282/*
283 * login_get_lastlog(struct logininfo *, int) - Retrieve a lastlog entry
andre6bb92372000-06-19 08:20:03 +0000284 *
285 * Retrieve a logininfo structure populated (only partially) with
286 * information from the system lastlog data, or from wtmp/wtmpx if no
287 * system lastlog information exists.
288 *
289 * Note this routine must be given a pre-allocated logininfo.
290 *
291 * Returns:
292 * >0: A pointer to your struct logininfo if successful
293 * 0 on failure (will use OpenSSH's logging facilities for diagnostics)
andre6bb92372000-06-19 08:20:03 +0000294 */
andre61e67252000-06-04 17:07:49 +0000295struct logininfo *
Damien Miller34ee4202010-11-05 10:52:37 +1100296login_get_lastlog(struct logininfo *li, const uid_t uid)
andre61e67252000-06-04 17:07:49 +0000297{
andre6bb92372000-06-19 08:20:03 +0000298 struct passwd *pw;
andre6bb92372000-06-19 08:20:03 +0000299
Damien Miller348c9b72000-08-15 10:01:22 +1000300 memset(li, '\0', sizeof(*li));
andre61e67252000-06-04 17:07:49 +0000301 li->uid = uid;
andre6bb92372000-06-19 08:20:03 +0000302
Kevin Stevesef4eea92001-02-05 12:42:17 +0000303 /*
Damien Miller53c5d462000-06-28 00:50:50 +1000304 * If we don't have a 'real' lastlog, we need the username to
andre6bb92372000-06-19 08:20:03 +0000305 * reliably search wtmp(x) for the last login (see
Kevin Stevesef4eea92001-02-05 12:42:17 +0000306 * wtmp_get_entry().)
Damien Miller53c5d462000-06-28 00:50:50 +1000307 */
andre6bb92372000-06-19 08:20:03 +0000308 pw = getpwuid(uid);
Damien Millerdd47aa22000-06-27 11:18:27 +1000309 if (pw == NULL)
Damien Miller34ee4202010-11-05 10:52:37 +1100310 fatal("%s: Cannot find account for uid %ld", __func__,
311 (long)uid);
Kevin Stevesef4eea92001-02-05 12:42:17 +0000312
andre98cabe02000-06-19 09:11:30 +0000313 /* No MIN_SIZEOF here - we absolutely *must not* truncate the
Damien Miller8899ed32004-09-12 15:18:55 +1000314 * username (XXX - so check for trunc!) */
Damien Millerf8af08d2000-06-27 09:40:06 +1000315 strlcpy(li->username, pw->pw_name, sizeof(li->username));
Damien Millerdd47aa22000-06-27 11:18:27 +1000316
andre61e67252000-06-04 17:07:49 +0000317 if (getlast_entry(li))
Damien Miller8899ed32004-09-12 15:18:55 +1000318 return (li);
andre61e67252000-06-04 17:07:49 +0000319 else
Damien Miller8899ed32004-09-12 15:18:55 +1000320 return (NULL);
andre61e67252000-06-04 17:07:49 +0000321}
322
323
Damien Miller8899ed32004-09-12 15:18:55 +1000324/*
325 * login_alloc_entry(int, char*, char*, char*) - Allocate and initialise
Kevin Stevesef4eea92001-02-05 12:42:17 +0000326 * a logininfo structure
327 *
andre6bb92372000-06-19 08:20:03 +0000328 * This function creates a new struct logininfo, a data structure
329 * meant to carry the information required to portably record login info.
330 *
331 * Returns a pointer to a newly created struct logininfo. If memory
332 * allocation fails, the program halts.
333 */
andre61e67252000-06-04 17:07:49 +0000334struct
Damien Miller34ee4202010-11-05 10:52:37 +1100335logininfo *login_alloc_entry(pid_t pid, const char *username,
Damien Miller8899ed32004-09-12 15:18:55 +1000336 const char *hostname, const char *line)
andre61e67252000-06-04 17:07:49 +0000337{
andre2ff7b5d2000-06-03 14:57:40 +0000338 struct logininfo *newli;
339
Damien Miller8899ed32004-09-12 15:18:55 +1000340 newli = xmalloc(sizeof(*newli));
341 login_init_entry(newli, pid, username, hostname, line);
342 return (newli);
andre61e67252000-06-04 17:07:49 +0000343}
andre2ff7b5d2000-06-03 14:57:40 +0000344
345
andre6bb92372000-06-19 08:20:03 +0000346/* login_free_entry(struct logininfo *) - free struct memory */
andre61e67252000-06-04 17:07:49 +0000347void
348login_free_entry(struct logininfo *li)
349{
Darren Tuckerf60845f2013-06-02 08:07:31 +1000350 free(li);
andre61e67252000-06-04 17:07:49 +0000351}
352
andre2ff7b5d2000-06-03 14:57:40 +0000353
andre6bb92372000-06-19 08:20:03 +0000354/* login_init_entry(struct logininfo *, int, char*, char*, char*)
355 * - initialise a struct logininfo
Kevin Stevesef4eea92001-02-05 12:42:17 +0000356 *
andre6bb92372000-06-19 08:20:03 +0000357 * Populates a new struct logininfo, a data structure meant to carry
358 * the information required to portably record login info.
359 *
360 * Returns: 1
361 */
andre61e67252000-06-04 17:07:49 +0000362int
Damien Miller34ee4202010-11-05 10:52:37 +1100363login_init_entry(struct logininfo *li, pid_t pid, const char *username,
Damien Miller8899ed32004-09-12 15:18:55 +1000364 const char *hostname, const char *line)
andre61e67252000-06-04 17:07:49 +0000365{
Damien Millerf8af08d2000-06-27 09:40:06 +1000366 struct passwd *pw;
Kevin Stevesef4eea92001-02-05 12:42:17 +0000367
Damien Miller348c9b72000-08-15 10:01:22 +1000368 memset(li, 0, sizeof(*li));
Kevin Stevesef4eea92001-02-05 12:42:17 +0000369
andre61e67252000-06-04 17:07:49 +0000370 li->pid = pid;
Damien Millerf8af08d2000-06-27 09:40:06 +1000371
andre2ff7b5d2000-06-03 14:57:40 +0000372 /* set the line information */
andre61e67252000-06-04 17:07:49 +0000373 if (line)
andre2ff7b5d2000-06-03 14:57:40 +0000374 line_fullname(li->line, line, sizeof(li->line));
andre2ff7b5d2000-06-03 14:57:40 +0000375
Damien Millerf8af08d2000-06-27 09:40:06 +1000376 if (username) {
andre2ff7b5d2000-06-03 14:57:40 +0000377 strlcpy(li->username, username, sizeof(li->username));
Damien Millerf8af08d2000-06-27 09:40:06 +1000378 pw = getpwnam(li->username);
Damien Miller8899ed32004-09-12 15:18:55 +1000379 if (pw == NULL) {
Damien Miller94cf4c82005-07-17 17:04:47 +1000380 fatal("%s: Cannot find user \"%s\"", __func__,
Damien Miller8899ed32004-09-12 15:18:55 +1000381 li->username);
382 }
Damien Millerf8af08d2000-06-27 09:40:06 +1000383 li->uid = pw->pw_uid;
384 }
Damien Millerdd47aa22000-06-27 11:18:27 +1000385
andre61e67252000-06-04 17:07:49 +0000386 if (hostname)
andre2ff7b5d2000-06-03 14:57:40 +0000387 strlcpy(li->hostname, hostname, sizeof(li->hostname));
Damien Millerf8af08d2000-06-27 09:40:06 +1000388
Damien Miller8899ed32004-09-12 15:18:55 +1000389 return (1);
andre2ff7b5d2000-06-03 14:57:40 +0000390}
391
Damien Miller94cf4c82005-07-17 17:04:47 +1000392/*
Damien Miller8899ed32004-09-12 15:18:55 +1000393 * login_set_current_time(struct logininfo *) - set the current time
andre6bb92372000-06-19 08:20:03 +0000394 *
395 * Set the current time in a logininfo structure. This function is
396 * meant to eliminate the need to deal with system dependencies for
397 * time handling.
398 */
andre2ff7b5d2000-06-03 14:57:40 +0000399void
andre61e67252000-06-04 17:07:49 +0000400login_set_current_time(struct logininfo *li)
401{
andre2ff7b5d2000-06-03 14:57:40 +0000402 struct timeval tv;
403
404 gettimeofday(&tv, NULL);
Kevin Stevesef4eea92001-02-05 12:42:17 +0000405
Damien Millerf8af08d2000-06-27 09:40:06 +1000406 li->tv_sec = tv.tv_sec;
407 li->tv_usec = tv.tv_usec;
andre2ff7b5d2000-06-03 14:57:40 +0000408}
409
andre61e67252000-06-04 17:07:49 +0000410/* copy a sockaddr_* into our logininfo */
andre2ff7b5d2000-06-03 14:57:40 +0000411void
andre61e67252000-06-04 17:07:49 +0000412login_set_addr(struct logininfo *li, const struct sockaddr *sa,
Damien Miller8899ed32004-09-12 15:18:55 +1000413 const unsigned int sa_size)
andre61e67252000-06-04 17:07:49 +0000414{
415 unsigned int bufsize = sa_size;
416
417 /* make sure we don't overrun our union */
418 if (sizeof(li->hostaddr) < sa_size)
419 bufsize = sizeof(li->hostaddr);
420
Damien Miller8899ed32004-09-12 15:18:55 +1000421 memcpy(&li->hostaddr.sa, sa, bufsize);
andre2ff7b5d2000-06-03 14:57:40 +0000422}
423
andre2ff7b5d2000-06-03 14:57:40 +0000424
andre61e67252000-06-04 17:07:49 +0000425/**
426 ** login_write: Call low-level recording functions based on autoconf
427 ** results
428 **/
andre2ff7b5d2000-06-03 14:57:40 +0000429int
Damien Miller8899ed32004-09-12 15:18:55 +1000430login_write(struct logininfo *li)
andre61e67252000-06-04 17:07:49 +0000431{
Damien Millerbac2d8a2000-09-05 16:13:06 +1100432#ifndef HAVE_CYGWIN
Damien Miller8899ed32004-09-12 15:18:55 +1000433 if (geteuid() != 0) {
434 logit("Attempt to write login records by non-root user (aborting)");
435 return (1);
andre2ff7b5d2000-06-03 14:57:40 +0000436 }
Damien Millerbac2d8a2000-09-05 16:13:06 +1100437#endif
Damien Millerdd47aa22000-06-27 11:18:27 +1000438
andre2ff7b5d2000-06-03 14:57:40 +0000439 /* set the timestamp */
440 login_set_current_time(li);
441#ifdef USE_LOGIN
442 syslogin_write_entry(li);
443#endif
444#ifdef USE_LASTLOG
Damien Miller8899ed32004-09-12 15:18:55 +1000445 if (li->type == LTYPE_LOGIN)
andre2ff7b5d2000-06-03 14:57:40 +0000446 lastlog_write_entry(li);
andre2ff7b5d2000-06-03 14:57:40 +0000447#endif
448#ifdef USE_UTMP
449 utmp_write_entry(li);
450#endif
451#ifdef USE_WTMP
452 wtmp_write_entry(li);
453#endif
454#ifdef USE_UTMPX
455 utmpx_write_entry(li);
456#endif
457#ifdef USE_WTMPX
458 wtmpx_write_entry(li);
459#endif
Darren Tucker397a2f22004-08-15 00:09:11 +1000460#ifdef CUSTOM_SYS_AUTH_RECORD_LOGIN
Damien Miller94cf4c82005-07-17 17:04:47 +1000461 if (li->type == LTYPE_LOGIN &&
Damien Millerb6f72f52005-07-17 17:26:43 +1000462 !sys_auth_record_login(li->username,li->hostname,li->line,
463 &loginmsg))
Darren Tucker397a2f22004-08-15 00:09:11 +1000464 logit("Writing login record failed for %s", li->username);
465#endif
Darren Tucker2e0cf0d2005-02-08 21:52:47 +1100466#ifdef SSH_AUDIT_EVENTS
Darren Tucker269a1ea2005-02-03 00:20:53 +1100467 if (li->type == LTYPE_LOGIN)
Darren Tuckerea52a822011-01-17 21:15:27 +1100468 audit_session_open(li);
Darren Tucker269a1ea2005-02-03 00:20:53 +1100469 else if (li->type == LTYPE_LOGOUT)
Darren Tuckerea52a822011-01-17 21:15:27 +1100470 audit_session_close(li);
Darren Tucker269a1ea2005-02-03 00:20:53 +1100471#endif
Damien Miller8899ed32004-09-12 15:18:55 +1000472 return (0);
andre2ff7b5d2000-06-03 14:57:40 +0000473}
474
Ben Lindstrom97c677d2001-05-08 20:33:05 +0000475#ifdef LOGIN_NEEDS_UTMPX
476int
477login_utmp_only(struct logininfo *li)
478{
Damien Millera8e06ce2003-11-21 23:48:55 +1100479 li->type = LTYPE_LOGIN;
Ben Lindstrom9197c592001-10-26 15:56:55 +0000480 login_set_current_time(li);
Ben Lindstrom97c677d2001-05-08 20:33:05 +0000481# ifdef USE_UTMP
482 utmp_write_entry(li);
483# endif
484# ifdef USE_WTMP
485 wtmp_write_entry(li);
486# endif
487# ifdef USE_UTMPX
488 utmpx_write_entry(li);
489# endif
490# ifdef USE_WTMPX
491 wtmpx_write_entry(li);
492# endif
Damien Miller8899ed32004-09-12 15:18:55 +1000493 return (0);
Ben Lindstrom97c677d2001-05-08 20:33:05 +0000494}
495#endif
496
andre2ff7b5d2000-06-03 14:57:40 +0000497/**
andre61e67252000-06-04 17:07:49 +0000498 ** getlast_entry: Call low-level functions to retrieve the last login
499 ** time.
andre2ff7b5d2000-06-03 14:57:40 +0000500 **/
501
andre61e67252000-06-04 17:07:49 +0000502/* take the uid in li and return the last login time */
503int
504getlast_entry(struct logininfo *li)
505{
506#ifdef USE_LASTLOG
Damien Miller53c5d462000-06-28 00:50:50 +1000507 return(lastlog_get_entry(li));
Damien Millerdd47aa22000-06-27 11:18:27 +1000508#else /* !USE_LASTLOG */
Darren Tucker261d93a2010-04-09 18:13:27 +1000509#if defined(USE_UTMPX) && defined(HAVE_SETUTXDB) && \
510 defined(UTXDB_LASTLOGIN) && defined(HAVE_GETUTXUSER)
511 return (utmpx_get_entry(li));
512#endif
andre61e67252000-06-04 17:07:49 +0000513
Damien Miller8899ed32004-09-12 15:18:55 +1000514#if defined(DISABLE_LASTLOG)
Kevin Stevesef4eea92001-02-05 12:42:17 +0000515 /* On some systems we shouldn't even try to obtain last login
andreecaabf12000-06-12 22:21:44 +0000516 * time, e.g. AIX */
Damien Miller8899ed32004-09-12 15:18:55 +1000517 return (0);
518# elif defined(USE_WTMP) && \
519 (defined(HAVE_TIME_IN_UTMP) || defined(HAVE_TV_IN_UTMP))
andre61e67252000-06-04 17:07:49 +0000520 /* retrieve last login time from utmp */
Damien Millerdd47aa22000-06-27 11:18:27 +1000521 return (wtmp_get_entry(li));
Damien Miller8899ed32004-09-12 15:18:55 +1000522# elif defined(USE_WTMPX) && \
523 (defined(HAVE_TIME_IN_UTMPX) || defined(HAVE_TV_IN_UTMPX))
andre61e67252000-06-04 17:07:49 +0000524 /* If wtmp isn't available, try wtmpx */
Damien Millerdd47aa22000-06-27 11:18:27 +1000525 return (wtmpx_get_entry(li));
Damien Miller8899ed32004-09-12 15:18:55 +1000526# else
andre61e67252000-06-04 17:07:49 +0000527 /* Give up: No means of retrieving last login time */
Damien Miller8899ed32004-09-12 15:18:55 +1000528 return (0);
Kevin Stevesef4eea92001-02-05 12:42:17 +0000529# endif /* DISABLE_LASTLOG */
Damien Millerdd47aa22000-06-27 11:18:27 +1000530#endif /* USE_LASTLOG */
andre61e67252000-06-04 17:07:49 +0000531}
532
533
534
andre2ff7b5d2000-06-03 14:57:40 +0000535/*
andre61e67252000-06-04 17:07:49 +0000536 * 'line' string utility functions
537 *
538 * These functions process the 'line' string into one of three forms:
539 *
andre2ff7b5d2000-06-03 14:57:40 +0000540 * 1. The full filename (including '/dev')
541 * 2. The stripped name (excluding '/dev')
andre61e67252000-06-04 17:07:49 +0000542 * 3. The abbreviated name (e.g. /dev/ttyp00 -> yp00
543 * /dev/pts/1 -> ts/1 )
andre2ff7b5d2000-06-03 14:57:40 +0000544 *
545 * Form 3 is used on some systems to identify a .tmp.? entry when
546 * attempting to remove it. Typically both addition and removal is
andre61e67252000-06-04 17:07:49 +0000547 * performed by one application - say, sshd - so as long as the choice
548 * uniquely identifies a terminal it's ok.
andre2ff7b5d2000-06-03 14:57:40 +0000549 */
550
551
Damien Miller8899ed32004-09-12 15:18:55 +1000552/*
553 * line_fullname(): add the leading '/dev/' if it doesn't exist make
554 * sure dst has enough space, if not just copy src (ugh)
555 */
andre2ff7b5d2000-06-03 14:57:40 +0000556char *
Damien Miller52c8afe2005-06-19 10:19:43 +1000557line_fullname(char *dst, const char *src, u_int dstsize)
andre61e67252000-06-04 17:07:49 +0000558{
andre2ff7b5d2000-06-03 14:57:40 +0000559 memset(dst, '\0', dstsize);
Damien Miller8899ed32004-09-12 15:18:55 +1000560 if ((strncmp(src, "/dev/", 5) == 0) || (dstsize < (strlen(src) + 5)))
andre2ff7b5d2000-06-03 14:57:40 +0000561 strlcpy(dst, src, dstsize);
Damien Miller8899ed32004-09-12 15:18:55 +1000562 else {
Damien Miller1a132252000-06-13 21:23:17 +1000563 strlcpy(dst, "/dev/", dstsize);
andre2ff7b5d2000-06-03 14:57:40 +0000564 strlcat(dst, src, dstsize);
565 }
Damien Miller8899ed32004-09-12 15:18:55 +1000566 return (dst);
andre2ff7b5d2000-06-03 14:57:40 +0000567}
568
andre61e67252000-06-04 17:07:49 +0000569/* line_stripname(): strip the leading '/dev' if it exists, return dst */
andre2ff7b5d2000-06-03 14:57:40 +0000570char *
andre61e67252000-06-04 17:07:49 +0000571line_stripname(char *dst, const char *src, int dstsize)
572{
andre2ff7b5d2000-06-03 14:57:40 +0000573 memset(dst, '\0', dstsize);
574 if (strncmp(src, "/dev/", 5) == 0)
Damien Millerf5a81472000-09-30 21:34:44 +1100575 strlcpy(dst, src + 5, dstsize);
andre2ff7b5d2000-06-03 14:57:40 +0000576 else
577 strlcpy(dst, src, dstsize);
Damien Miller8899ed32004-09-12 15:18:55 +1000578 return (dst);
andre61e67252000-06-04 17:07:49 +0000579}
580
Damien Miller94cf4c82005-07-17 17:04:47 +1000581/*
Damien Miller8899ed32004-09-12 15:18:55 +1000582 * line_abbrevname(): Return the abbreviated (usually four-character)
andre61e67252000-06-04 17:07:49 +0000583 * form of the line (Just use the last <dstsize> characters of the
584 * full name.)
585 *
586 * NOTE: use strncpy because we do NOT necessarily want zero
Damien Miller8899ed32004-09-12 15:18:55 +1000587 * termination
588 */
andre2ff7b5d2000-06-03 14:57:40 +0000589char *
Kevin Stevesef4eea92001-02-05 12:42:17 +0000590line_abbrevname(char *dst, const char *src, int dstsize)
Damien Millerdd47aa22000-06-27 11:18:27 +1000591{
592 size_t len;
Kevin Stevesef4eea92001-02-05 12:42:17 +0000593
andre2ff7b5d2000-06-03 14:57:40 +0000594 memset(dst, '\0', dstsize);
Kevin Stevesef4eea92001-02-05 12:42:17 +0000595
Damien Miller8e81ed32000-07-01 13:17:42 +1000596 /* Always skip prefix if present */
597 if (strncmp(src, "/dev/", 5) == 0)
598 src += 5;
Kevin Stevesef4eea92001-02-05 12:42:17 +0000599
Damien Millerf1b9d112002-04-23 23:09:19 +1000600#ifdef WITH_ABBREV_NO_TTY
601 if (strncmp(src, "tty", 3) == 0)
602 src += 3;
603#endif
604
Damien Millerdd47aa22000-06-27 11:18:27 +1000605 len = strlen(src);
606
Damien Miller8e81ed32000-07-01 13:17:42 +1000607 if (len > 0) {
608 if (((int)len - dstsize) > 0)
609 src += ((int)len - dstsize);
610
611 /* note: _don't_ change this to strlcpy */
Kevin Stevesef4eea92001-02-05 12:42:17 +0000612 strncpy(dst, src, (size_t)dstsize);
Damien Millerdd47aa22000-06-27 11:18:27 +1000613 }
Kevin Stevesef4eea92001-02-05 12:42:17 +0000614
Damien Miller8899ed32004-09-12 15:18:55 +1000615 return (dst);
andre2ff7b5d2000-06-03 14:57:40 +0000616}
617
andre2ff7b5d2000-06-03 14:57:40 +0000618/**
619 ** utmp utility functions
andre61e67252000-06-04 17:07:49 +0000620 **
621 ** These functions manipulate struct utmp, taking system differences
622 ** into account.
andre2ff7b5d2000-06-03 14:57:40 +0000623 **/
624
625#if defined(USE_UTMP) || defined (USE_WTMP) || defined (USE_LOGIN)
626
andre2ff7b5d2000-06-03 14:57:40 +0000627/* build the utmp structure */
628void
andre61e67252000-06-04 17:07:49 +0000629set_utmp_time(struct logininfo *li, struct utmp *ut)
630{
Damien Miller8899ed32004-09-12 15:18:55 +1000631# if defined(HAVE_TV_IN_UTMP)
andre2ff7b5d2000-06-03 14:57:40 +0000632 ut->ut_tv.tv_sec = li->tv_sec;
633 ut->ut_tv.tv_usec = li->tv_usec;
Damien Miller8899ed32004-09-12 15:18:55 +1000634# elif defined(HAVE_TIME_IN_UTMP)
andre2ff7b5d2000-06-03 14:57:40 +0000635 ut->ut_time = li->tv_sec;
Damien Millerdd47aa22000-06-27 11:18:27 +1000636# endif
andre2ff7b5d2000-06-03 14:57:40 +0000637}
638
639void
640construct_utmp(struct logininfo *li,
andre61e67252000-06-04 17:07:49 +0000641 struct utmp *ut)
642{
Damien Miller02e16ad2003-01-03 14:42:27 +1100643# ifdef HAVE_ADDR_V6_IN_UTMP
644 struct sockaddr_in6 *sa6;
Damien Miller8899ed32004-09-12 15:18:55 +1000645# endif
646
Damien Miller348c9b72000-08-15 10:01:22 +1000647 memset(ut, '\0', sizeof(*ut));
andre6bb92372000-06-19 08:20:03 +0000648
649 /* First fill out fields used for both logins and logouts */
650
Damien Millerdd47aa22000-06-27 11:18:27 +1000651# ifdef HAVE_ID_IN_UTMP
andre2ff7b5d2000-06-03 14:57:40 +0000652 line_abbrevname(ut->ut_id, li->line, sizeof(ut->ut_id));
Damien Millerdd47aa22000-06-27 11:18:27 +1000653# endif
andre2ff7b5d2000-06-03 14:57:40 +0000654
Damien Millerdd47aa22000-06-27 11:18:27 +1000655# ifdef HAVE_TYPE_IN_UTMP
andre6bb92372000-06-19 08:20:03 +0000656 /* This is done here to keep utmp constants out of struct logininfo */
andre2ff7b5d2000-06-03 14:57:40 +0000657 switch (li->type) {
658 case LTYPE_LOGIN:
659 ut->ut_type = USER_PROCESS;
Tim Rice81ed5182002-09-25 17:38:46 -0700660#ifdef _UNICOS
Ben Lindstrom6db66ff2001-08-06 23:29:16 +0000661 cray_set_tmpdir(ut);
662#endif
andre2ff7b5d2000-06-03 14:57:40 +0000663 break;
664 case LTYPE_LOGOUT:
665 ut->ut_type = DEAD_PROCESS;
Tim Rice81ed5182002-09-25 17:38:46 -0700666#ifdef _UNICOS
Ben Lindstrom6db66ff2001-08-06 23:29:16 +0000667 cray_retain_utmp(ut, li->pid);
668#endif
andre2ff7b5d2000-06-03 14:57:40 +0000669 break;
670 }
Damien Millerdd47aa22000-06-27 11:18:27 +1000671# endif
andre6bb92372000-06-19 08:20:03 +0000672 set_utmp_time(li, ut);
andre2ff7b5d2000-06-03 14:57:40 +0000673
andre6bb92372000-06-19 08:20:03 +0000674 line_stripname(ut->ut_line, li->line, sizeof(ut->ut_line));
Damien Millerdd47aa22000-06-27 11:18:27 +1000675
676# ifdef HAVE_PID_IN_UTMP
andre2ff7b5d2000-06-03 14:57:40 +0000677 ut->ut_pid = li->pid;
Damien Millerdd47aa22000-06-27 11:18:27 +1000678# endif
andre6bb92372000-06-19 08:20:03 +0000679
680 /* If we're logging out, leave all other fields blank */
681 if (li->type == LTYPE_LOGOUT)
Damien Miller8899ed32004-09-12 15:18:55 +1000682 return;
andre6bb92372000-06-19 08:20:03 +0000683
Damien Millerdd47aa22000-06-27 11:18:27 +1000684 /*
685 * These fields are only used when logging in, and are blank
Kevin Stevesef4eea92001-02-05 12:42:17 +0000686 * for logouts.
Damien Millerdd47aa22000-06-27 11:18:27 +1000687 */
andre6bb92372000-06-19 08:20:03 +0000688
689 /* Use strncpy because we don't necessarily want null termination */
Damien Miller8899ed32004-09-12 15:18:55 +1000690 strncpy(ut->ut_name, li->username,
691 MIN_SIZEOF(ut->ut_name, li->username));
Damien Millerdd47aa22000-06-27 11:18:27 +1000692# ifdef HAVE_HOST_IN_UTMP
Damien Miller8899ed32004-09-12 15:18:55 +1000693 strncpy(ut->ut_host, li->hostname,
694 MIN_SIZEOF(ut->ut_host, li->hostname));
Damien Millerdd47aa22000-06-27 11:18:27 +1000695# endif
696# ifdef HAVE_ADDR_IN_UTMP
andre61e67252000-06-04 17:07:49 +0000697 /* this is just a 32-bit IP address */
698 if (li->hostaddr.sa.sa_family == AF_INET)
699 ut->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr;
Kevin Stevesef4eea92001-02-05 12:42:17 +0000700# endif
Damien Miller02e16ad2003-01-03 14:42:27 +1100701# ifdef HAVE_ADDR_V6_IN_UTMP
702 /* this is just a 128-bit IPv6 address */
703 if (li->hostaddr.sa.sa_family == AF_INET6) {
704 sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa);
705 memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16);
706 if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) {
707 ut->ut_addr_v6[0] = ut->ut_addr_v6[3];
708 ut->ut_addr_v6[1] = 0;
709 ut->ut_addr_v6[2] = 0;
710 ut->ut_addr_v6[3] = 0;
711 }
712 }
713# endif
andre61e67252000-06-04 17:07:49 +0000714}
Damien Millerdd47aa22000-06-27 11:18:27 +1000715#endif /* USE_UTMP || USE_WTMP || USE_LOGIN */
andre61e67252000-06-04 17:07:49 +0000716
andre2ff7b5d2000-06-03 14:57:40 +0000717/**
718 ** utmpx utility functions
andre61e67252000-06-04 17:07:49 +0000719 **
720 ** These functions manipulate struct utmpx, accounting for system
721 ** variations.
andre2ff7b5d2000-06-03 14:57:40 +0000722 **/
723
724#if defined(USE_UTMPX) || defined (USE_WTMPX)
andre2ff7b5d2000-06-03 14:57:40 +0000725/* build the utmpx structure */
726void
andre61e67252000-06-04 17:07:49 +0000727set_utmpx_time(struct logininfo *li, struct utmpx *utx)
728{
Damien Miller8899ed32004-09-12 15:18:55 +1000729# if defined(HAVE_TV_IN_UTMPX)
andre2ff7b5d2000-06-03 14:57:40 +0000730 utx->ut_tv.tv_sec = li->tv_sec;
731 utx->ut_tv.tv_usec = li->tv_usec;
Damien Miller8899ed32004-09-12 15:18:55 +1000732# elif defined(HAVE_TIME_IN_UTMPX)
andre2ff7b5d2000-06-03 14:57:40 +0000733 utx->ut_time = li->tv_sec;
Damien Miller8899ed32004-09-12 15:18:55 +1000734# endif
andre2ff7b5d2000-06-03 14:57:40 +0000735}
736
andre61e67252000-06-04 17:07:49 +0000737void
738construct_utmpx(struct logininfo *li, struct utmpx *utx)
739{
Damien Miller02e16ad2003-01-03 14:42:27 +1100740# ifdef HAVE_ADDR_V6_IN_UTMP
741 struct sockaddr_in6 *sa6;
742# endif
Damien Miller348c9b72000-08-15 10:01:22 +1000743 memset(utx, '\0', sizeof(*utx));
Damien Miller8899ed32004-09-12 15:18:55 +1000744
Damien Miller8e81ed32000-07-01 13:17:42 +1000745# ifdef HAVE_ID_IN_UTMPX
andre2ff7b5d2000-06-03 14:57:40 +0000746 line_abbrevname(utx->ut_id, li->line, sizeof(utx->ut_id));
Damien Miller8e81ed32000-07-01 13:17:42 +1000747# endif
andre2ff7b5d2000-06-03 14:57:40 +0000748
749 /* this is done here to keep utmp constants out of loginrec.h */
750 switch (li->type) {
751 case LTYPE_LOGIN:
752 utx->ut_type = USER_PROCESS;
753 break;
754 case LTYPE_LOGOUT:
755 utx->ut_type = DEAD_PROCESS;
756 break;
757 }
andre2ff7b5d2000-06-03 14:57:40 +0000758 line_stripname(utx->ut_line, li->line, sizeof(utx->ut_line));
andre2ff7b5d2000-06-03 14:57:40 +0000759 set_utmpx_time(li, utx);
andre6bb92372000-06-19 08:20:03 +0000760 utx->ut_pid = li->pid;
Damien Miller8899ed32004-09-12 15:18:55 +1000761
Tim Ricee06ae4a2002-02-24 17:56:46 -0800762 /* strncpy(): Don't necessarily want null termination */
Darren Tucker0b8a2262010-01-09 18:18:04 +1100763 strncpy(utx->ut_user, li->username,
764 MIN_SIZEOF(utx->ut_user, li->username));
andre6bb92372000-06-19 08:20:03 +0000765
766 if (li->type == LTYPE_LOGOUT)
767 return;
768
Damien Millerdd47aa22000-06-27 11:18:27 +1000769 /*
770 * These fields are only used when logging in, and are blank
Kevin Stevesef4eea92001-02-05 12:42:17 +0000771 * for logouts.
Damien Millerdd47aa22000-06-27 11:18:27 +1000772 */
andre6bb92372000-06-19 08:20:03 +0000773
Damien Millerdd47aa22000-06-27 11:18:27 +1000774# ifdef HAVE_HOST_IN_UTMPX
Damien Miller8899ed32004-09-12 15:18:55 +1000775 strncpy(utx->ut_host, li->hostname,
776 MIN_SIZEOF(utx->ut_host, li->hostname));
Damien Millerdd47aa22000-06-27 11:18:27 +1000777# endif
778# ifdef HAVE_ADDR_IN_UTMPX
Damien Millerd6f204d2000-09-23 13:57:27 +1100779 /* this is just a 32-bit IP address */
780 if (li->hostaddr.sa.sa_family == AF_INET)
781 utx->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr;
Damien Millerdd47aa22000-06-27 11:18:27 +1000782# endif
Damien Miller02e16ad2003-01-03 14:42:27 +1100783# ifdef HAVE_ADDR_V6_IN_UTMP
784 /* this is just a 128-bit IPv6 address */
785 if (li->hostaddr.sa.sa_family == AF_INET6) {
786 sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa);
787 memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16);
788 if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) {
789 ut->ut_addr_v6[0] = ut->ut_addr_v6[3];
790 ut->ut_addr_v6[1] = 0;
791 ut->ut_addr_v6[2] = 0;
792 ut->ut_addr_v6[3] = 0;
793 }
794 }
795# endif
Damien Millerdd47aa22000-06-27 11:18:27 +1000796# ifdef HAVE_SYSLEN_IN_UTMPX
andre6bb92372000-06-19 08:20:03 +0000797 /* ut_syslen is the length of the utx_host string */
798 utx->ut_syslen = MIN(strlen(li->hostname), sizeof(utx->ut_host));
Damien Millerdd47aa22000-06-27 11:18:27 +1000799# endif
andre61e67252000-06-04 17:07:49 +0000800}
Damien Millerdd47aa22000-06-27 11:18:27 +1000801#endif /* USE_UTMPX || USE_WTMPX */
andre2ff7b5d2000-06-03 14:57:40 +0000802
803/**
andre61e67252000-06-04 17:07:49 +0000804 ** Low-level utmp functions
andre2ff7b5d2000-06-03 14:57:40 +0000805 **/
806
807/* FIXME: (ATL) utmp_write_direct needs testing */
andre2ff7b5d2000-06-03 14:57:40 +0000808#ifdef USE_UTMP
809
andre2ff7b5d2000-06-03 14:57:40 +0000810/* if we can, use pututline() etc. */
Damien Millerdd47aa22000-06-27 11:18:27 +1000811# if !defined(DISABLE_PUTUTLINE) && defined(HAVE_SETUTENT) && \
812 defined(HAVE_PUTUTLINE)
andre2ff7b5d2000-06-03 14:57:40 +0000813# define UTMP_USE_LIBRARY
Damien Millerdd47aa22000-06-27 11:18:27 +1000814# endif
andre2ff7b5d2000-06-03 14:57:40 +0000815
816
817/* write a utmp entry with the system's help (pututline() and pals) */
Damien Millerdd47aa22000-06-27 11:18:27 +1000818# ifdef UTMP_USE_LIBRARY
andre2ff7b5d2000-06-03 14:57:40 +0000819static int
andre61e67252000-06-04 17:07:49 +0000820utmp_write_library(struct logininfo *li, struct utmp *ut)
821{
andre2ff7b5d2000-06-03 14:57:40 +0000822 setutent();
823 pututline(ut);
Damien Millerdd47aa22000-06-27 11:18:27 +1000824# ifdef HAVE_ENDUTENT
andre2ff7b5d2000-06-03 14:57:40 +0000825 endutent();
Damien Millerdd47aa22000-06-27 11:18:27 +1000826# endif
Damien Miller8899ed32004-09-12 15:18:55 +1000827 return (1);
andre61e67252000-06-04 17:07:49 +0000828}
Damien Millerdd47aa22000-06-27 11:18:27 +1000829# else /* UTMP_USE_LIBRARY */
andre2ff7b5d2000-06-03 14:57:40 +0000830
Damien Miller94cf4c82005-07-17 17:04:47 +1000831/*
Damien Miller8899ed32004-09-12 15:18:55 +1000832 * Write a utmp entry direct to the file
833 * This is a slightly modification of code in OpenBSD's login.c
834 */
andre2ff7b5d2000-06-03 14:57:40 +0000835static int
andre61e67252000-06-04 17:07:49 +0000836utmp_write_direct(struct logininfo *li, struct utmp *ut)
837{
andre2ff7b5d2000-06-03 14:57:40 +0000838 struct utmp old_ut;
839 register int fd;
840 int tty;
841
andre6bb92372000-06-19 08:20:03 +0000842 /* FIXME: (ATL) ttyslot() needs local implementation */
Damien Miller348c9b72000-08-15 10:01:22 +1000843
Damien Millere5192fa2000-08-29 14:30:37 +1100844#if defined(HAVE_GETTTYENT)
Damien Miller8899ed32004-09-12 15:18:55 +1000845 struct ttyent *ty;
Damien Miller348c9b72000-08-15 10:01:22 +1000846
847 tty=0;
Damien Miller348c9b72000-08-15 10:01:22 +1000848 setttyent();
Damien Miller8899ed32004-09-12 15:18:55 +1000849 while (NULL != (ty = getttyent())) {
Damien Miller348c9b72000-08-15 10:01:22 +1000850 tty++;
851 if (!strncmp(ty->ty_name, ut->ut_line, sizeof(ut->ut_line)))
852 break;
853 }
854 endttyent();
855
Damien Miller8899ed32004-09-12 15:18:55 +1000856 if (NULL == ty) {
Damien Miller81409592004-08-15 19:12:52 +1000857 logit("%s: tty not found", __func__);
858 return (0);
Damien Miller348c9b72000-08-15 10:01:22 +1000859 }
860#else /* FIXME */
861
andre2ff7b5d2000-06-03 14:57:40 +0000862 tty = ttyslot(); /* seems only to work for /dev/ttyp? style names */
863
Damien Millere5192fa2000-08-29 14:30:37 +1100864#endif /* HAVE_GETTTYENT */
Damien Miller348c9b72000-08-15 10:01:22 +1000865
andre2ff7b5d2000-06-03 14:57:40 +0000866 if (tty > 0 && (fd = open(UTMP_FILE, O_RDWR|O_CREAT, 0644)) >= 0) {
Damien Miller81409592004-08-15 19:12:52 +1000867 off_t pos, ret;
868
869 pos = (off_t)tty * sizeof(struct utmp);
870 if ((ret = lseek(fd, pos, SEEK_SET)) == -1) {
Damien Millerb0419f22004-08-23 21:53:28 +1000871 logit("%s: lseek: %s", __func__, strerror(errno));
Damien Miller4a06f922011-01-02 21:43:59 +1100872 close(fd);
Damien Miller81409592004-08-15 19:12:52 +1000873 return (0);
874 }
875 if (ret != pos) {
Damien Miller94cf4c82005-07-17 17:04:47 +1000876 logit("%s: Couldn't seek to tty %d slot in %s",
Damien Millerb0419f22004-08-23 21:53:28 +1000877 __func__, tty, UTMP_FILE);
Damien Miller4a06f922011-01-02 21:43:59 +1100878 close(fd);
Damien Miller81409592004-08-15 19:12:52 +1000879 return (0);
880 }
andre2ff7b5d2000-06-03 14:57:40 +0000881 /*
882 * Prevent luser from zero'ing out ut_host.
883 * If the new ut_line is empty but the old one is not
Damien Miller7a0e5dc2000-07-11 12:15:54 +1000884 * and ut_line and ut_name match, preserve the old ut_line.
andre2ff7b5d2000-06-03 14:57:40 +0000885 */
Kevin Stevesef4eea92001-02-05 12:42:17 +0000886 if (atomicio(read, fd, &old_ut, sizeof(old_ut)) == sizeof(old_ut) &&
Damien Miller8899ed32004-09-12 15:18:55 +1000887 (ut->ut_host[0] == '\0') && (old_ut.ut_host[0] != '\0') &&
888 (strncmp(old_ut.ut_line, ut->ut_line, sizeof(ut->ut_line)) == 0) &&
889 (strncmp(old_ut.ut_name, ut->ut_name, sizeof(ut->ut_name)) == 0))
890 memcpy(ut->ut_host, old_ut.ut_host, sizeof(ut->ut_host));
Kevin Stevesef4eea92001-02-05 12:42:17 +0000891
Damien Miller81409592004-08-15 19:12:52 +1000892 if ((ret = lseek(fd, pos, SEEK_SET)) == -1) {
Damien Millerb0419f22004-08-23 21:53:28 +1000893 logit("%s: lseek: %s", __func__, strerror(errno));
Damien Miller4a06f922011-01-02 21:43:59 +1100894 close(fd);
Damien Miller81409592004-08-15 19:12:52 +1000895 return (0);
896 }
897 if (ret != pos) {
Damien Millerb0419f22004-08-23 21:53:28 +1000898 logit("%s: Couldn't seek to tty %d slot in %s",
Damien Miller81409592004-08-15 19:12:52 +1000899 __func__, tty, UTMP_FILE);
Damien Miller4a06f922011-01-02 21:43:59 +1100900 close(fd);
Damien Miller81409592004-08-15 19:12:52 +1000901 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 Miller4a06f922011-01-02 21:43:59 +1100906 close(fd);
907 return (0);
Damien Miller8899ed32004-09-12 15:18:55 +1000908 }
Kevin Stevesef4eea92001-02-05 12:42:17 +0000909
Damien Miller8899ed32004-09-12 15:18:55 +1000910 close(fd);
911 return (1);
Damien Miller53c5d462000-06-28 00:50:50 +1000912 } else {
Damien Miller8899ed32004-09-12 15:18:55 +1000913 return (0);
Damien Miller53c5d462000-06-28 00:50:50 +1000914 }
andre61e67252000-06-04 17:07:49 +0000915}
Damien Millerdd47aa22000-06-27 11:18:27 +1000916# endif /* UTMP_USE_LIBRARY */
andre2ff7b5d2000-06-03 14:57:40 +0000917
918static int
andre61e67252000-06-04 17:07:49 +0000919utmp_perform_login(struct logininfo *li)
920{
andre2ff7b5d2000-06-03 14:57:40 +0000921 struct utmp ut;
922
923 construct_utmp(li, &ut);
Damien Millerdd47aa22000-06-27 11:18:27 +1000924# ifdef UTMP_USE_LIBRARY
andre2ff7b5d2000-06-03 14:57:40 +0000925 if (!utmp_write_library(li, &ut)) {
Damien Miller6b0279c2004-09-12 15:25:17 +1000926 logit("%s: utmp_write_library() failed", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +1000927 return (0);
andre2ff7b5d2000-06-03 14:57:40 +0000928 }
Damien Millerdd47aa22000-06-27 11:18:27 +1000929# else
andre2ff7b5d2000-06-03 14:57:40 +0000930 if (!utmp_write_direct(li, &ut)) {
Damien Miller6b0279c2004-09-12 15:25:17 +1000931 logit("%s: utmp_write_direct() failed", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +1000932 return (0);
andre2ff7b5d2000-06-03 14:57:40 +0000933 }
Damien Millerdd47aa22000-06-27 11:18:27 +1000934# endif
Damien Miller8899ed32004-09-12 15:18:55 +1000935 return (1);
andre61e67252000-06-04 17:07:49 +0000936}
andre2ff7b5d2000-06-03 14:57:40 +0000937
938
939static int
andre61e67252000-06-04 17:07:49 +0000940utmp_perform_logout(struct logininfo *li)
941{
andre2ff7b5d2000-06-03 14:57:40 +0000942 struct utmp ut;
943
andre6bb92372000-06-19 08:20:03 +0000944 construct_utmp(li, &ut);
Damien Millerdd47aa22000-06-27 11:18:27 +1000945# ifdef UTMP_USE_LIBRARY
andre6bb92372000-06-19 08:20:03 +0000946 if (!utmp_write_library(li, &ut)) {
Damien Miller6b0279c2004-09-12 15:25:17 +1000947 logit("%s: utmp_write_library() failed", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +1000948 return (0);
andre6bb92372000-06-19 08:20:03 +0000949 }
Damien Millerdd47aa22000-06-27 11:18:27 +1000950# else
andre6bb92372000-06-19 08:20:03 +0000951 if (!utmp_write_direct(li, &ut)) {
Damien Miller6b0279c2004-09-12 15:25:17 +1000952 logit("%s: utmp_write_direct() failed", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +1000953 return (0);
andre6bb92372000-06-19 08:20:03 +0000954 }
Damien Millerdd47aa22000-06-27 11:18:27 +1000955# endif
Damien Miller8899ed32004-09-12 15:18:55 +1000956 return (1);
andre61e67252000-06-04 17:07:49 +0000957}
andre2ff7b5d2000-06-03 14:57:40 +0000958
959
960int
andre61e67252000-06-04 17:07:49 +0000961utmp_write_entry(struct logininfo *li)
962{
andre2ff7b5d2000-06-03 14:57:40 +0000963 switch(li->type) {
964 case LTYPE_LOGIN:
Damien Miller8899ed32004-09-12 15:18:55 +1000965 return (utmp_perform_login(li));
andre2ff7b5d2000-06-03 14:57:40 +0000966
967 case LTYPE_LOGOUT:
Damien Miller8899ed32004-09-12 15:18:55 +1000968 return (utmp_perform_logout(li));
andre2ff7b5d2000-06-03 14:57:40 +0000969
970 default:
Damien Miller6b0279c2004-09-12 15:25:17 +1000971 logit("%s: invalid type field", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +1000972 return (0);
andre2ff7b5d2000-06-03 14:57:40 +0000973 }
andre61e67252000-06-04 17:07:49 +0000974}
Damien Millerdd47aa22000-06-27 11:18:27 +1000975#endif /* USE_UTMP */
andre2ff7b5d2000-06-03 14:57:40 +0000976
977
978/**
andre61e67252000-06-04 17:07:49 +0000979 ** Low-level utmpx functions
andre2ff7b5d2000-06-03 14:57:40 +0000980 **/
981
982/* not much point if we don't want utmpx entries */
983#ifdef USE_UTMPX
984
andre2ff7b5d2000-06-03 14:57:40 +0000985/* if we have the wherewithall, use pututxline etc. */
Damien Millerdd47aa22000-06-27 11:18:27 +1000986# if !defined(DISABLE_PUTUTXLINE) && defined(HAVE_SETUTXENT) && \
987 defined(HAVE_PUTUTXLINE)
andre2ff7b5d2000-06-03 14:57:40 +0000988# define UTMPX_USE_LIBRARY
Damien Millerdd47aa22000-06-27 11:18:27 +1000989# endif
andre2ff7b5d2000-06-03 14:57:40 +0000990
991
992/* write a utmpx entry with the system's help (pututxline() and pals) */
Damien Millerdd47aa22000-06-27 11:18:27 +1000993# ifdef UTMPX_USE_LIBRARY
andre2ff7b5d2000-06-03 14:57:40 +0000994static int
andre61e67252000-06-04 17:07:49 +0000995utmpx_write_library(struct logininfo *li, struct utmpx *utx)
996{
andre2ff7b5d2000-06-03 14:57:40 +0000997 setutxent();
998 pututxline(utx);
999
Damien Millerdd47aa22000-06-27 11:18:27 +10001000# ifdef HAVE_ENDUTXENT
andre2ff7b5d2000-06-03 14:57:40 +00001001 endutxent();
Damien Millerdd47aa22000-06-27 11:18:27 +10001002# endif
Damien Miller8899ed32004-09-12 15:18:55 +10001003 return (1);
andre61e67252000-06-04 17:07:49 +00001004}
andre2ff7b5d2000-06-03 14:57:40 +00001005
Damien Millerdd47aa22000-06-27 11:18:27 +10001006# else /* UTMPX_USE_LIBRARY */
andre2ff7b5d2000-06-03 14:57:40 +00001007
1008/* write a utmp entry direct to the file */
1009static int
andre61e67252000-06-04 17:07:49 +00001010utmpx_write_direct(struct logininfo *li, struct utmpx *utx)
Kevin Stevesef4eea92001-02-05 12:42:17 +00001011{
Damien Miller6b0279c2004-09-12 15:25:17 +10001012 logit("%s: not implemented!", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001013 return (0);
andre61e67252000-06-04 17:07:49 +00001014}
Damien Millerdd47aa22000-06-27 11:18:27 +10001015# endif /* UTMPX_USE_LIBRARY */
andre2ff7b5d2000-06-03 14:57:40 +00001016
1017static int
andre61e67252000-06-04 17:07:49 +00001018utmpx_perform_login(struct logininfo *li)
1019{
andre2ff7b5d2000-06-03 14:57:40 +00001020 struct utmpx utx;
1021
1022 construct_utmpx(li, &utx);
Damien Millerdd47aa22000-06-27 11:18:27 +10001023# ifdef UTMPX_USE_LIBRARY
andre2ff7b5d2000-06-03 14:57:40 +00001024 if (!utmpx_write_library(li, &utx)) {
Damien Miller6b0279c2004-09-12 15:25:17 +10001025 logit("%s: utmp_write_library() failed", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001026 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001027 }
Damien Millerdd47aa22000-06-27 11:18:27 +10001028# else
andre2ff7b5d2000-06-03 14:57:40 +00001029 if (!utmpx_write_direct(li, &ut)) {
Damien Miller6b0279c2004-09-12 15:25:17 +10001030 logit("%s: utmp_write_direct() failed", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001031 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001032 }
Damien Millerdd47aa22000-06-27 11:18:27 +10001033# endif
Damien Miller8899ed32004-09-12 15:18:55 +10001034 return (1);
andre61e67252000-06-04 17:07:49 +00001035}
andre2ff7b5d2000-06-03 14:57:40 +00001036
1037
1038static int
andre61e67252000-06-04 17:07:49 +00001039utmpx_perform_logout(struct logininfo *li)
1040{
andre2ff7b5d2000-06-03 14:57:40 +00001041 struct utmpx utx;
1042
Tim Ricee06ae4a2002-02-24 17:56:46 -08001043 construct_utmpx(li, &utx);
Damien Millerdd47aa22000-06-27 11:18:27 +10001044# ifdef HAVE_ID_IN_UTMPX
andre2ff7b5d2000-06-03 14:57:40 +00001045 line_abbrevname(utx.ut_id, li->line, sizeof(utx.ut_id));
Damien Millerdd47aa22000-06-27 11:18:27 +10001046# endif
1047# ifdef HAVE_TYPE_IN_UTMPX
andre2ff7b5d2000-06-03 14:57:40 +00001048 utx.ut_type = DEAD_PROCESS;
Damien Millerdd47aa22000-06-27 11:18:27 +10001049# endif
andre2ff7b5d2000-06-03 14:57:40 +00001050
Damien Millerdd47aa22000-06-27 11:18:27 +10001051# ifdef UTMPX_USE_LIBRARY
andre2ff7b5d2000-06-03 14:57:40 +00001052 utmpx_write_library(li, &utx);
Damien Millerdd47aa22000-06-27 11:18:27 +10001053# else
andre2ff7b5d2000-06-03 14:57:40 +00001054 utmpx_write_direct(li, &utx);
Damien Millerdd47aa22000-06-27 11:18:27 +10001055# endif
Damien Miller8899ed32004-09-12 15:18:55 +10001056 return (1);
andre61e67252000-06-04 17:07:49 +00001057}
andre2ff7b5d2000-06-03 14:57:40 +00001058
andre2ff7b5d2000-06-03 14:57:40 +00001059int
andre61e67252000-06-04 17:07:49 +00001060utmpx_write_entry(struct logininfo *li)
1061{
andre2ff7b5d2000-06-03 14:57:40 +00001062 switch(li->type) {
1063 case LTYPE_LOGIN:
Damien Miller8899ed32004-09-12 15:18:55 +10001064 return (utmpx_perform_login(li));
andre2ff7b5d2000-06-03 14:57:40 +00001065 case LTYPE_LOGOUT:
Damien Miller8899ed32004-09-12 15:18:55 +10001066 return (utmpx_perform_logout(li));
andre2ff7b5d2000-06-03 14:57:40 +00001067 default:
Damien Miller6b0279c2004-09-12 15:25:17 +10001068 logit("%s: invalid type field", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001069 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001070 }
andre61e67252000-06-04 17:07:49 +00001071}
Damien Millerdd47aa22000-06-27 11:18:27 +10001072#endif /* USE_UTMPX */
andre2ff7b5d2000-06-03 14:57:40 +00001073
1074
1075/**
andre61e67252000-06-04 17:07:49 +00001076 ** Low-level wtmp functions
andre2ff7b5d2000-06-03 14:57:40 +00001077 **/
1078
Kevin Stevesef4eea92001-02-05 12:42:17 +00001079#ifdef USE_WTMP
andre2ff7b5d2000-06-03 14:57:40 +00001080
Damien Miller94cf4c82005-07-17 17:04:47 +10001081/*
Damien Miller8899ed32004-09-12 15:18:55 +10001082 * Write a wtmp entry direct to the end of the file
1083 * This is a slight modification of code in OpenBSD's logwtmp.c
1084 */
andre2ff7b5d2000-06-03 14:57:40 +00001085static int
andre61e67252000-06-04 17:07:49 +00001086wtmp_write(struct logininfo *li, struct utmp *ut)
1087{
andre2ff7b5d2000-06-03 14:57:40 +00001088 struct stat buf;
1089 int fd, ret = 1;
1090
1091 if ((fd = open(WTMP_FILE, O_WRONLY|O_APPEND, 0)) < 0) {
Damien Miller6b0279c2004-09-12 15:25:17 +10001092 logit("%s: problem writing %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001093 WTMP_FILE, strerror(errno));
Damien Miller8899ed32004-09-12 15:18:55 +10001094 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001095 }
Kevin Stevesef4eea92001-02-05 12:42:17 +00001096 if (fstat(fd, &buf) == 0)
Darren Tucker8661b562003-07-06 15:20:46 +10001097 if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) {
andre2ff7b5d2000-06-03 14:57:40 +00001098 ftruncate(fd, buf.st_size);
Damien Miller6b0279c2004-09-12 15:25:17 +10001099 logit("%s: problem writing %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001100 WTMP_FILE, strerror(errno));
1101 ret = 0;
1102 }
Damien Miller8899ed32004-09-12 15:18:55 +10001103 close(fd);
1104 return (ret);
andre61e67252000-06-04 17:07:49 +00001105}
andre2ff7b5d2000-06-03 14:57:40 +00001106
andre2ff7b5d2000-06-03 14:57:40 +00001107static int
Damien Millerdd47aa22000-06-27 11:18:27 +10001108wtmp_perform_login(struct logininfo *li)
1109{
andre2ff7b5d2000-06-03 14:57:40 +00001110 struct utmp ut;
1111
1112 construct_utmp(li, &ut);
Damien Miller8899ed32004-09-12 15:18:55 +10001113 return (wtmp_write(li, &ut));
andre61e67252000-06-04 17:07:49 +00001114}
andre2ff7b5d2000-06-03 14:57:40 +00001115
1116
1117static int
andre61e67252000-06-04 17:07:49 +00001118wtmp_perform_logout(struct logininfo *li)
1119{
andre2ff7b5d2000-06-03 14:57:40 +00001120 struct utmp ut;
1121
1122 construct_utmp(li, &ut);
Damien Miller8899ed32004-09-12 15:18:55 +10001123 return (wtmp_write(li, &ut));
andre61e67252000-06-04 17:07:49 +00001124}
andre2ff7b5d2000-06-03 14:57:40 +00001125
1126
1127int
andre61e67252000-06-04 17:07:49 +00001128wtmp_write_entry(struct logininfo *li)
1129{
andre2ff7b5d2000-06-03 14:57:40 +00001130 switch(li->type) {
1131 case LTYPE_LOGIN:
Damien Miller8899ed32004-09-12 15:18:55 +10001132 return (wtmp_perform_login(li));
andre2ff7b5d2000-06-03 14:57:40 +00001133 case LTYPE_LOGOUT:
Damien Miller8899ed32004-09-12 15:18:55 +10001134 return (wtmp_perform_logout(li));
andre2ff7b5d2000-06-03 14:57:40 +00001135 default:
Damien Miller6b0279c2004-09-12 15:25:17 +10001136 logit("%s: invalid type field", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001137 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001138 }
andre61e67252000-06-04 17:07:49 +00001139}
andre2ff7b5d2000-06-03 14:57:40 +00001140
1141
Damien Miller94cf4c82005-07-17 17:04:47 +10001142/*
Damien Miller8899ed32004-09-12 15:18:55 +10001143 * Notes on fetching login data from wtmp/wtmpx
Kevin Stevesef4eea92001-02-05 12:42:17 +00001144 *
andre6bb92372000-06-19 08:20:03 +00001145 * Logouts are usually recorded with (amongst other things) a blank
1146 * username on a given tty line. However, some systems (HP-UX is one)
1147 * leave all fields set, but change the ut_type field to DEAD_PROCESS.
1148 *
1149 * Since we're only looking for logins here, we know that the username
1150 * must be set correctly. On systems that leave it in, we check for
1151 * ut_type==USER_PROCESS (indicating a login.)
1152 *
1153 * Portability: Some systems may set something other than USER_PROCESS
1154 * to indicate a login process. I don't know of any as I write. Also,
1155 * it's possible that some systems may both leave the username in
1156 * place and not have ut_type.
1157 */
1158
andre6bb92372000-06-19 08:20:03 +00001159/* return true if this wtmp entry indicates a login */
1160static int
1161wtmp_islogin(struct logininfo *li, struct utmp *ut)
1162{
Kevin Stevesef4eea92001-02-05 12:42:17 +00001163 if (strncmp(li->username, ut->ut_name,
Damien Miller8899ed32004-09-12 15:18:55 +10001164 MIN_SIZEOF(li->username, ut->ut_name)) == 0) {
Damien Millerdd47aa22000-06-27 11:18:27 +10001165# ifdef HAVE_TYPE_IN_UTMP
andre6bb92372000-06-19 08:20:03 +00001166 if (ut->ut_type & USER_PROCESS)
Damien Miller8899ed32004-09-12 15:18:55 +10001167 return (1);
Damien Millerdd47aa22000-06-27 11:18:27 +10001168# else
Damien Miller8899ed32004-09-12 15:18:55 +10001169 return (1);
Damien Millerdd47aa22000-06-27 11:18:27 +10001170# endif
andre6bb92372000-06-19 08:20:03 +00001171 }
Damien Miller8899ed32004-09-12 15:18:55 +10001172 return (0);
andre6bb92372000-06-19 08:20:03 +00001173}
1174
andre2ff7b5d2000-06-03 14:57:40 +00001175int
andre61e67252000-06-04 17:07:49 +00001176wtmp_get_entry(struct logininfo *li)
1177{
andre2ff7b5d2000-06-03 14:57:40 +00001178 struct stat st;
1179 struct utmp ut;
Damien Miller8899ed32004-09-12 15:18:55 +10001180 int fd, found = 0;
andre6bb92372000-06-19 08:20:03 +00001181
1182 /* Clear the time entries in our logininfo */
1183 li->tv_sec = li->tv_usec = 0;
andre2ff7b5d2000-06-03 14:57:40 +00001184
1185 if ((fd = open(WTMP_FILE, O_RDONLY)) < 0) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001186 logit("%s: problem opening %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001187 WTMP_FILE, strerror(errno));
Damien Miller8899ed32004-09-12 15:18:55 +10001188 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001189 }
Kevin Stevesef4eea92001-02-05 12:42:17 +00001190 if (fstat(fd, &st) != 0) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001191 logit("%s: couldn't stat %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001192 WTMP_FILE, strerror(errno));
1193 close(fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001194 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001195 }
andre2ff7b5d2000-06-03 14:57:40 +00001196
andre6bb92372000-06-19 08:20:03 +00001197 /* Seek to the start of the last struct utmp */
Kevin Steves52172652001-10-02 00:29:00 +00001198 if (lseek(fd, -(off_t)sizeof(struct utmp), SEEK_END) == -1) {
andre6bb92372000-06-19 08:20:03 +00001199 /* Looks like we've got a fresh wtmp file */
1200 close(fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001201 return (0);
andre6bb92372000-06-19 08:20:03 +00001202 }
1203
1204 while (!found) {
Damien Miller53c5d462000-06-28 00:50:50 +10001205 if (atomicio(read, fd, &ut, sizeof(ut)) != sizeof(ut)) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001206 logit("%s: read of %s failed: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001207 WTMP_FILE, strerror(errno));
1208 close (fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001209 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001210 }
Damien Miller4a06f922011-01-02 21:43:59 +11001211 if (wtmp_islogin(li, &ut) ) {
andre6bb92372000-06-19 08:20:03 +00001212 found = 1;
Damien Miller8899ed32004-09-12 15:18:55 +10001213 /*
1214 * We've already checked for a time in struct
1215 * utmp, in login_getlast()
1216 */
Damien Millerdd47aa22000-06-27 11:18:27 +10001217# ifdef HAVE_TIME_IN_UTMP
andre2ff7b5d2000-06-03 14:57:40 +00001218 li->tv_sec = ut.ut_time;
Damien Millerdd47aa22000-06-27 11:18:27 +10001219# else
andre2ff7b5d2000-06-03 14:57:40 +00001220# if HAVE_TV_IN_UTMP
1221 li->tv_sec = ut.ut_tv.tv_sec;
1222# endif
Damien Millerdd47aa22000-06-27 11:18:27 +10001223# endif
andre6bb92372000-06-19 08:20:03 +00001224 line_fullname(li->line, ut.ut_line,
Damien Miller8899ed32004-09-12 15:18:55 +10001225 MIN_SIZEOF(li->line, ut.ut_line));
Damien Millerdd47aa22000-06-27 11:18:27 +10001226# ifdef HAVE_HOST_IN_UTMP
andre6bb92372000-06-19 08:20:03 +00001227 strlcpy(li->hostname, ut.ut_host,
Damien Miller8899ed32004-09-12 15:18:55 +10001228 MIN_SIZEOF(li->hostname, ut.ut_host));
Damien Millerdd47aa22000-06-27 11:18:27 +10001229# endif
andre6bb92372000-06-19 08:20:03 +00001230 continue;
andre2ff7b5d2000-06-03 14:57:40 +00001231 }
andre6bb92372000-06-19 08:20:03 +00001232 /* Seek back 2 x struct utmp */
Kevin Steves52172652001-10-02 00:29:00 +00001233 if (lseek(fd, -(off_t)(2 * sizeof(struct utmp)), SEEK_CUR) == -1) {
andre6bb92372000-06-19 08:20:03 +00001234 /* We've found the start of the file, so quit */
Damien Miller8899ed32004-09-12 15:18:55 +10001235 close(fd);
1236 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001237 }
andre6bb92372000-06-19 08:20:03 +00001238 }
1239
1240 /* We found an entry. Tidy up and return */
1241 close(fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001242 return (1);
andre61e67252000-06-04 17:07:49 +00001243}
Damien Millerdd47aa22000-06-27 11:18:27 +10001244# endif /* USE_WTMP */
andre2ff7b5d2000-06-03 14:57:40 +00001245
1246
1247/**
andre61e67252000-06-04 17:07:49 +00001248 ** Low-level wtmpx functions
andre2ff7b5d2000-06-03 14:57:40 +00001249 **/
1250
1251#ifdef USE_WTMPX
Damien Miller8899ed32004-09-12 15:18:55 +10001252/*
1253 * Write a wtmpx entry direct to the end of the file
1254 * This is a slight modification of code in OpenBSD's logwtmp.c
1255 */
andre2ff7b5d2000-06-03 14:57:40 +00001256static int
andre61e67252000-06-04 17:07:49 +00001257wtmpx_write(struct logininfo *li, struct utmpx *utx)
1258{
Darren Tuckerc28b88a2004-02-10 16:49:35 +11001259#ifndef HAVE_UPDWTMPX
andre2ff7b5d2000-06-03 14:57:40 +00001260 struct stat buf;
1261 int fd, ret = 1;
1262
1263 if ((fd = open(WTMPX_FILE, O_WRONLY|O_APPEND, 0)) < 0) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001264 logit("%s: problem opening %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001265 WTMPX_FILE, strerror(errno));
Damien Miller8899ed32004-09-12 15:18:55 +10001266 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001267 }
1268
Kevin Stevesef4eea92001-02-05 12:42:17 +00001269 if (fstat(fd, &buf) == 0)
Darren Tucker8661b562003-07-06 15:20:46 +10001270 if (atomicio(vwrite, fd, utx, sizeof(*utx)) != sizeof(*utx)) {
andre2ff7b5d2000-06-03 14:57:40 +00001271 ftruncate(fd, buf.st_size);
Damien Miller6b0279c2004-09-12 15:25:17 +10001272 logit("%s: problem writing %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001273 WTMPX_FILE, strerror(errno));
1274 ret = 0;
1275 }
Damien Miller8899ed32004-09-12 15:18:55 +10001276 close(fd);
andre2ff7b5d2000-06-03 14:57:40 +00001277
Damien Miller8899ed32004-09-12 15:18:55 +10001278 return (ret);
Darren Tuckerc28b88a2004-02-10 16:49:35 +11001279#else
1280 updwtmpx(WTMPX_FILE, utx);
Damien Miller8899ed32004-09-12 15:18:55 +10001281 return (1);
Darren Tuckerc28b88a2004-02-10 16:49:35 +11001282#endif
andre61e67252000-06-04 17:07:49 +00001283}
andre2ff7b5d2000-06-03 14:57:40 +00001284
1285
1286static int
andre61e67252000-06-04 17:07:49 +00001287wtmpx_perform_login(struct logininfo *li)
1288{
andre2ff7b5d2000-06-03 14:57:40 +00001289 struct utmpx utx;
1290
1291 construct_utmpx(li, &utx);
Damien Miller8899ed32004-09-12 15:18:55 +10001292 return (wtmpx_write(li, &utx));
andre61e67252000-06-04 17:07:49 +00001293}
andre2ff7b5d2000-06-03 14:57:40 +00001294
1295
1296static int
andre61e67252000-06-04 17:07:49 +00001297wtmpx_perform_logout(struct logininfo *li)
1298{
andre2ff7b5d2000-06-03 14:57:40 +00001299 struct utmpx utx;
1300
1301 construct_utmpx(li, &utx);
Damien Miller8899ed32004-09-12 15:18:55 +10001302 return (wtmpx_write(li, &utx));
andre61e67252000-06-04 17:07:49 +00001303}
andre2ff7b5d2000-06-03 14:57:40 +00001304
1305
1306int
andre61e67252000-06-04 17:07:49 +00001307wtmpx_write_entry(struct logininfo *li)
1308{
andre2ff7b5d2000-06-03 14:57:40 +00001309 switch(li->type) {
1310 case LTYPE_LOGIN:
Damien Miller8899ed32004-09-12 15:18:55 +10001311 return (wtmpx_perform_login(li));
andre2ff7b5d2000-06-03 14:57:40 +00001312 case LTYPE_LOGOUT:
Damien Miller8899ed32004-09-12 15:18:55 +10001313 return (wtmpx_perform_logout(li));
andre2ff7b5d2000-06-03 14:57:40 +00001314 default:
Damien Miller6b0279c2004-09-12 15:25:17 +10001315 logit("%s: invalid type field", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001316 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001317 }
andre61e67252000-06-04 17:07:49 +00001318}
andre2ff7b5d2000-06-03 14:57:40 +00001319
andre6bb92372000-06-19 08:20:03 +00001320/* Please see the notes above wtmp_islogin() for information about the
1321 next two functions */
1322
1323/* Return true if this wtmpx entry indicates a login */
1324static int
1325wtmpx_islogin(struct logininfo *li, struct utmpx *utx)
1326{
Darren Tucker0b8a2262010-01-09 18:18:04 +11001327 if (strncmp(li->username, utx->ut_user,
1328 MIN_SIZEOF(li->username, utx->ut_user)) == 0 ) {
Damien Millerdd47aa22000-06-27 11:18:27 +10001329# ifdef HAVE_TYPE_IN_UTMPX
andre6bb92372000-06-19 08:20:03 +00001330 if (utx->ut_type == USER_PROCESS)
Damien Miller8899ed32004-09-12 15:18:55 +10001331 return (1);
Damien Millerdd47aa22000-06-27 11:18:27 +10001332# else
Damien Miller8899ed32004-09-12 15:18:55 +10001333 return (1);
Damien Millerdd47aa22000-06-27 11:18:27 +10001334# endif
andre6bb92372000-06-19 08:20:03 +00001335 }
Damien Miller8899ed32004-09-12 15:18:55 +10001336 return (0);
andre6bb92372000-06-19 08:20:03 +00001337}
1338
andre2ff7b5d2000-06-03 14:57:40 +00001339
1340int
andre61e67252000-06-04 17:07:49 +00001341wtmpx_get_entry(struct logininfo *li)
1342{
andre2ff7b5d2000-06-03 14:57:40 +00001343 struct stat st;
1344 struct utmpx utx;
andre6bb92372000-06-19 08:20:03 +00001345 int fd, found=0;
1346
1347 /* Clear the time entries */
1348 li->tv_sec = li->tv_usec = 0;
andre2ff7b5d2000-06-03 14:57:40 +00001349
1350 if ((fd = open(WTMPX_FILE, O_RDONLY)) < 0) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001351 logit("%s: problem opening %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001352 WTMPX_FILE, strerror(errno));
Damien Miller8899ed32004-09-12 15:18:55 +10001353 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001354 }
Kevin Stevesef4eea92001-02-05 12:42:17 +00001355 if (fstat(fd, &st) != 0) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001356 logit("%s: couldn't stat %s: %s", __func__,
Tim Ricecdb82942002-07-14 15:33:20 -07001357 WTMPX_FILE, strerror(errno));
andre2ff7b5d2000-06-03 14:57:40 +00001358 close(fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001359 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001360 }
Kevin Stevesef4eea92001-02-05 12:42:17 +00001361
andre6bb92372000-06-19 08:20:03 +00001362 /* Seek to the start of the last struct utmpx */
Kevin Steves52172652001-10-02 00:29:00 +00001363 if (lseek(fd, -(off_t)sizeof(struct utmpx), SEEK_END) == -1 ) {
andre6bb92372000-06-19 08:20:03 +00001364 /* probably a newly rotated wtmpx file */
1365 close(fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001366 return (0);
andre6bb92372000-06-19 08:20:03 +00001367 }
andre2ff7b5d2000-06-03 14:57:40 +00001368
andre6bb92372000-06-19 08:20:03 +00001369 while (!found) {
Damien Miller53c5d462000-06-28 00:50:50 +10001370 if (atomicio(read, fd, &utx, sizeof(utx)) != sizeof(utx)) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001371 logit("%s: read of %s failed: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001372 WTMPX_FILE, strerror(errno));
1373 close (fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001374 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001375 }
Damien Miller8899ed32004-09-12 15:18:55 +10001376 /*
Damien Miller94cf4c82005-07-17 17:04:47 +10001377 * Logouts are recorded as a blank username on a particular
Damien Miller8899ed32004-09-12 15:18:55 +10001378 * line. So, we just need to find the username in struct utmpx
1379 */
1380 if (wtmpx_islogin(li, &utx)) {
Tim Rice370e0ba2002-07-14 15:50:51 -07001381 found = 1;
Damien Miller8899ed32004-09-12 15:18:55 +10001382# if defined(HAVE_TV_IN_UTMPX)
andre2ff7b5d2000-06-03 14:57:40 +00001383 li->tv_sec = utx.ut_tv.tv_sec;
Damien Miller8899ed32004-09-12 15:18:55 +10001384# elif defined(HAVE_TIME_IN_UTMPX)
andre2ff7b5d2000-06-03 14:57:40 +00001385 li->tv_sec = utx.ut_time;
Damien Millerdd47aa22000-06-27 11:18:27 +10001386# endif
Damien Miller1a132252000-06-13 21:23:17 +10001387 line_fullname(li->line, utx.ut_line, sizeof(li->line));
Damien Miller8899ed32004-09-12 15:18:55 +10001388# if defined(HAVE_HOST_IN_UTMPX)
andre6bb92372000-06-19 08:20:03 +00001389 strlcpy(li->hostname, utx.ut_host,
Damien Miller8899ed32004-09-12 15:18:55 +10001390 MIN_SIZEOF(li->hostname, utx.ut_host));
Damien Millerdd47aa22000-06-27 11:18:27 +10001391# endif
andre6bb92372000-06-19 08:20:03 +00001392 continue;
andre2ff7b5d2000-06-03 14:57:40 +00001393 }
Kevin Steves52172652001-10-02 00:29:00 +00001394 if (lseek(fd, -(off_t)(2 * sizeof(struct utmpx)), SEEK_CUR) == -1) {
Damien Miller8899ed32004-09-12 15:18:55 +10001395 close(fd);
1396 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001397 }
andre6bb92372000-06-19 08:20:03 +00001398 }
1399
1400 close(fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001401 return (1);
andre61e67252000-06-04 17:07:49 +00001402}
Damien Millerd5bf3072000-06-07 21:32:13 +10001403#endif /* USE_WTMPX */
andre2ff7b5d2000-06-03 14:57:40 +00001404
andre2ff7b5d2000-06-03 14:57:40 +00001405/**
andre61e67252000-06-04 17:07:49 +00001406 ** Low-level libutil login() functions
andre2ff7b5d2000-06-03 14:57:40 +00001407 **/
1408
1409#ifdef USE_LOGIN
andre2ff7b5d2000-06-03 14:57:40 +00001410static int
andre61e67252000-06-04 17:07:49 +00001411syslogin_perform_login(struct logininfo *li)
1412{
andre2ff7b5d2000-06-03 14:57:40 +00001413 struct utmp *ut;
1414
Damien Millerb0aae332004-09-12 15:26:00 +10001415 ut = xmalloc(sizeof(*ut));
andre2ff7b5d2000-06-03 14:57:40 +00001416 construct_utmp(li, ut);
1417 login(ut);
Damien Millerf211efc2003-03-10 11:23:06 +11001418 free(ut);
andre2ff7b5d2000-06-03 14:57:40 +00001419
Damien Miller8899ed32004-09-12 15:18:55 +10001420 return (1);
andre61e67252000-06-04 17:07:49 +00001421}
1422
andre2ff7b5d2000-06-03 14:57:40 +00001423static int
andre61e67252000-06-04 17:07:49 +00001424syslogin_perform_logout(struct logininfo *li)
1425{
Damien Millerdd47aa22000-06-27 11:18:27 +10001426# ifdef HAVE_LOGOUT
Darren Tucker4d2f3612004-04-08 10:57:05 +10001427 char line[UT_LINESIZE];
Kevin Stevesef4eea92001-02-05 12:42:17 +00001428
andre2ff7b5d2000-06-03 14:57:40 +00001429 (void)line_stripname(line, li->line, sizeof(line));
1430
Damien Miller8899ed32004-09-12 15:18:55 +10001431 if (!logout(line))
Damien Miller6b0279c2004-09-12 15:25:17 +10001432 logit("%s: logout() returned an error", __func__);
Damien Millerdd47aa22000-06-27 11:18:27 +10001433# ifdef HAVE_LOGWTMP
Damien Miller8899ed32004-09-12 15:18:55 +10001434 else
andre2ff7b5d2000-06-03 14:57:40 +00001435 logwtmp(line, "", "");
Damien Millerdd47aa22000-06-27 11:18:27 +10001436# endif
andre6bb92372000-06-19 08:20:03 +00001437 /* FIXME: (ATL - if the need arises) What to do if we have
1438 * login, but no logout? what if logout but no logwtmp? All
1439 * routines are in libutil so they should all be there,
1440 * but... */
Damien Millerdd47aa22000-06-27 11:18:27 +10001441# endif
Damien Miller8899ed32004-09-12 15:18:55 +10001442 return (1);
andre61e67252000-06-04 17:07:49 +00001443}
andre2ff7b5d2000-06-03 14:57:40 +00001444
andre2ff7b5d2000-06-03 14:57:40 +00001445int
andre61e67252000-06-04 17:07:49 +00001446syslogin_write_entry(struct logininfo *li)
1447{
andre2ff7b5d2000-06-03 14:57:40 +00001448 switch (li->type) {
1449 case LTYPE_LOGIN:
Damien Miller8899ed32004-09-12 15:18:55 +10001450 return (syslogin_perform_login(li));
andre2ff7b5d2000-06-03 14:57:40 +00001451 case LTYPE_LOGOUT:
Damien Miller8899ed32004-09-12 15:18:55 +10001452 return (syslogin_perform_logout(li));
andre2ff7b5d2000-06-03 14:57:40 +00001453 default:
Damien Miller6b0279c2004-09-12 15:25:17 +10001454 logit("%s: Invalid type field", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001455 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001456 }
andre61e67252000-06-04 17:07:49 +00001457}
Damien Millerd5bf3072000-06-07 21:32:13 +10001458#endif /* USE_LOGIN */
andre2ff7b5d2000-06-03 14:57:40 +00001459
1460/* end of file log-syslogin.c */
1461
andre2ff7b5d2000-06-03 14:57:40 +00001462/**
andre61e67252000-06-04 17:07:49 +00001463 ** Low-level lastlog functions
andre2ff7b5d2000-06-03 14:57:40 +00001464 **/
1465
1466#ifdef USE_LASTLOG
1467
Damien Miller20e231f2009-02-12 13:12:21 +11001468#if !defined(LASTLOG_WRITE_PUTUTXLINE) || !defined(HAVE_GETLASTLOGXBYNAME)
1469/* open the file (using filemode) and seek to the login entry */
andre2ff7b5d2000-06-03 14:57:40 +00001470static int
Damien Miller20e231f2009-02-12 13:12:21 +11001471lastlog_openseek(struct logininfo *li, int *fd, int filemode)
andre61e67252000-06-04 17:07:49 +00001472{
Damien Miller20e231f2009-02-12 13:12:21 +11001473 off_t offset;
1474 char lastlog_file[1024];
andre2ff7b5d2000-06-03 14:57:40 +00001475 struct stat st;
1476
Damien Millerdd47aa22000-06-27 11:18:27 +10001477 if (stat(LASTLOG_FILE, &st) != 0) {
Damien Miller6b0279c2004-09-12 15:25:17 +10001478 logit("%s: Couldn't stat %s: %s", __func__,
Damien Miller8899ed32004-09-12 15:18:55 +10001479 LASTLOG_FILE, strerror(errno));
1480 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001481 }
Damien Miller20e231f2009-02-12 13:12:21 +11001482 if (S_ISDIR(st.st_mode)) {
Damien Miller8899ed32004-09-12 15:18:55 +10001483 snprintf(lastlog_file, sizeof(lastlog_file), "%s/%s",
1484 LASTLOG_FILE, li->username);
Damien Miller20e231f2009-02-12 13:12:21 +11001485 } else if (S_ISREG(st.st_mode)) {
1486 strlcpy(lastlog_file, LASTLOG_FILE, sizeof(lastlog_file));
1487 } else {
Damien Miller6b0279c2004-09-12 15:25:17 +10001488 logit("%s: %.100s is not a file or directory!", __func__,
Damien Miller8899ed32004-09-12 15:18:55 +10001489 LASTLOG_FILE);
1490 return (0);
Damien Millerdd47aa22000-06-27 11:18:27 +10001491 }
andre2ff7b5d2000-06-03 14:57:40 +00001492
Damien Miller405dc602003-04-09 21:12:52 +10001493 *fd = open(lastlog_file, filemode, 0600);
Damien Miller8899ed32004-09-12 15:18:55 +10001494 if (*fd < 0) {
Damien Miller6b0279c2004-09-12 15:25:17 +10001495 debug("%s: Couldn't open %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001496 lastlog_file, strerror(errno));
Damien Miller8899ed32004-09-12 15:18:55 +10001497 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001498 }
Kevin Stevesef4eea92001-02-05 12:42:17 +00001499
Damien Miller20e231f2009-02-12 13:12:21 +11001500 if (S_ISREG(st.st_mode)) {
Damien Millere477ef62000-08-15 10:21:17 +10001501 /* find this uid's offset in the lastlog file */
Damien Miller34ee4202010-11-05 10:52:37 +11001502 offset = (off_t) ((u_long)li->uid * sizeof(struct lastlog));
andre2ff7b5d2000-06-03 14:57:40 +00001503
Damien Miller8899ed32004-09-12 15:18:55 +10001504 if (lseek(*fd, offset, SEEK_SET) != offset) {
Damien Miller6b0279c2004-09-12 15:25:17 +10001505 logit("%s: %s->lseek(): %s", __func__,
1506 lastlog_file, strerror(errno));
Damien Miller4a06f922011-01-02 21:43:59 +11001507 close(*fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001508 return (0);
Damien Millere477ef62000-08-15 10:21:17 +10001509 }
andre2ff7b5d2000-06-03 14:57:40 +00001510 }
Kevin Stevesef4eea92001-02-05 12:42:17 +00001511
Damien Miller8899ed32004-09-12 15:18:55 +10001512 return (1);
andre61e67252000-06-04 17:07:49 +00001513}
Damien Miller20e231f2009-02-12 13:12:21 +11001514#endif /* !LASTLOG_WRITE_PUTUTXLINE || !HAVE_GETLASTLOGXBYNAME */
andre2ff7b5d2000-06-03 14:57:40 +00001515
Damien Miller20e231f2009-02-12 13:12:21 +11001516#ifdef LASTLOG_WRITE_PUTUTXLINE
andre2ff7b5d2000-06-03 14:57:40 +00001517int
andre61e67252000-06-04 17:07:49 +00001518lastlog_write_entry(struct logininfo *li)
1519{
andre2ff7b5d2000-06-03 14:57:40 +00001520 switch(li->type) {
1521 case LTYPE_LOGIN:
Damien Miller20e231f2009-02-12 13:12:21 +11001522 return 1; /* lastlog written by pututxline */
1523 default:
1524 logit("lastlog_write_entry: Invalid type field");
1525 return 0;
1526 }
1527}
1528#else /* LASTLOG_WRITE_PUTUTXLINE */
1529int
1530lastlog_write_entry(struct logininfo *li)
1531{
1532 struct lastlog last;
1533 int fd;
1534
1535 switch(li->type) {
1536 case LTYPE_LOGIN:
1537 /* create our struct lastlog */
1538 memset(&last, '\0', sizeof(last));
1539 line_stripname(last.ll_line, li->line, sizeof(last.ll_line));
1540 strlcpy(last.ll_host, li->hostname,
1541 MIN_SIZEOF(last.ll_host, li->hostname));
1542 last.ll_time = li->tv_sec;
1543
1544 if (!lastlog_openseek(li, &fd, O_RDWR|O_CREAT))
1545 return (0);
1546
1547 /* write the entry */
1548 if (atomicio(vwrite, fd, &last, sizeof(last)) != sizeof(last)) {
1549 close(fd);
1550 logit("%s: Error writing to %s: %s", __func__,
1551 LASTLOG_FILE, strerror(errno));
1552 return (0);
1553 }
1554
1555 close(fd);
1556 return (1);
andre2ff7b5d2000-06-03 14:57:40 +00001557 default:
Damien Miller6b0279c2004-09-12 15:25:17 +10001558 logit("%s: Invalid type field", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001559 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001560 }
andre61e67252000-06-04 17:07:49 +00001561}
Damien Miller20e231f2009-02-12 13:12:21 +11001562#endif /* LASTLOG_WRITE_PUTUTXLINE */
andre2ff7b5d2000-06-03 14:57:40 +00001563
Damien Miller20e231f2009-02-12 13:12:21 +11001564#ifdef HAVE_GETLASTLOGXBYNAME
1565int
1566lastlog_get_entry(struct logininfo *li)
andre61e67252000-06-04 17:07:49 +00001567{
Damien Miller20e231f2009-02-12 13:12:21 +11001568 struct lastlogx l, *ll;
andre2ff7b5d2000-06-03 14:57:40 +00001569
Damien Miller20e231f2009-02-12 13:12:21 +11001570 if ((ll = getlastlogxbyname(li->username, &l)) == NULL) {
1571 memset(&l, '\0', sizeof(l));
1572 ll = &l;
1573 }
1574 line_fullname(li->line, ll->ll_line, sizeof(li->line));
1575 strlcpy(li->hostname, ll->ll_host,
1576 MIN_SIZEOF(li->hostname, ll->ll_host));
1577 li->tv_sec = ll->ll_tv.tv_sec;
1578 li->tv_usec = ll->ll_tv.tv_usec;
1579 return (1);
1580}
1581#else /* HAVE_GETLASTLOGXBYNAME */
andre2ff7b5d2000-06-03 14:57:40 +00001582int
andre61e67252000-06-04 17:07:49 +00001583lastlog_get_entry(struct logininfo *li)
1584{
andre2ff7b5d2000-06-03 14:57:40 +00001585 struct lastlog last;
Damien Miller7df881d2003-01-07 16:46:58 +11001586 int fd, ret;
andre2ff7b5d2000-06-03 14:57:40 +00001587
Damien Miller3a8a5cd2001-10-22 16:49:22 +10001588 if (!lastlog_openseek(li, &fd, O_RDONLY))
Damien Miller7df881d2003-01-07 16:46:58 +11001589 return (0);
Damien Miller3a8a5cd2001-10-22 16:49:22 +10001590
Damien Miller7df881d2003-01-07 16:46:58 +11001591 ret = atomicio(read, fd, &last, sizeof(last));
Damien Miller3a8a5cd2001-10-22 16:49:22 +10001592 close(fd);
1593
Damien Miller7df881d2003-01-07 16:46:58 +11001594 switch (ret) {
1595 case 0:
1596 memset(&last, '\0', sizeof(last));
1597 /* FALLTHRU */
1598 case sizeof(last):
Damien Miller20e231f2009-02-12 13:12:21 +11001599 line_fullname(li->line, last.ll_line, sizeof(li->line));
1600 strlcpy(li->hostname, last.ll_host,
1601 MIN_SIZEOF(li->hostname, last.ll_host));
1602 li->tv_sec = last.ll_time;
Damien Miller7df881d2003-01-07 16:46:58 +11001603 return (1);
1604 case -1:
Damien Millera8e06ce2003-11-21 23:48:55 +11001605 error("%s: Error reading from %s: %s", __func__,
Damien Miller7df881d2003-01-07 16:46:58 +11001606 LASTLOG_FILE, strerror(errno));
1607 return (0);
1608 default:
1609 error("%s: Error reading from %s: Expecting %d, got %d",
Darren Tuckerefc17472005-11-22 19:55:13 +11001610 __func__, LASTLOG_FILE, (int)sizeof(last), ret);
Damien Miller7df881d2003-01-07 16:46:58 +11001611 return (0);
1612 }
Damien Miller3a8a5cd2001-10-22 16:49:22 +10001613
Damien Miller7df881d2003-01-07 16:46:58 +11001614 /* NOTREACHED */
1615 return (0);
andre61e67252000-06-04 17:07:49 +00001616}
Damien Miller20e231f2009-02-12 13:12:21 +11001617#endif /* HAVE_GETLASTLOGXBYNAME */
Damien Millerd5bf3072000-06-07 21:32:13 +10001618#endif /* USE_LASTLOG */
Darren Tucker2fba9932005-02-02 23:30:24 +11001619
Darren Tucker261d93a2010-04-09 18:13:27 +10001620#if defined(USE_UTMPX) && defined(HAVE_SETUTXDB) && \
1621 defined(UTXDB_LASTLOGIN) && defined(HAVE_GETUTXUSER)
1622int
1623utmpx_get_entry(struct logininfo *li)
1624{
1625 struct utmpx *utx;
1626
1627 if (setutxdb(UTXDB_LASTLOGIN, NULL) != 0)
1628 return (0);
1629 utx = getutxuser(li->username);
1630 if (utx == NULL) {
1631 endutxent();
1632 return (0);
1633 }
1634
1635 line_fullname(li->line, utx->ut_line,
1636 MIN_SIZEOF(li->line, utx->ut_line));
1637 strlcpy(li->hostname, utx->ut_host,
1638 MIN_SIZEOF(li->hostname, utx->ut_host));
1639 li->tv_sec = utx->ut_tv.tv_sec;
1640 li->tv_usec = utx->ut_tv.tv_usec;
1641 endutxent();
1642 return (1);
1643}
1644#endif /* USE_UTMPX && HAVE_SETUTXDB && UTXDB_LASTLOGIN && HAVE_GETUTXUSER */
1645
Darren Tucker2fba9932005-02-02 23:30:24 +11001646#ifdef USE_BTMP
1647 /*
1648 * Logs failed login attempts in _PATH_BTMP if that exists.
1649 * The most common login failure is to give password instead of username.
1650 * So the _PATH_BTMP file checked for the correct permission, so that
1651 * only root can read it.
1652 */
1653
1654void
1655record_failed_login(const char *username, const char *hostname,
1656 const char *ttyn)
1657{
1658 int fd;
1659 struct utmp ut;
1660 struct sockaddr_storage from;
Darren Tuckerefc17472005-11-22 19:55:13 +11001661 socklen_t fromlen = sizeof(from);
Darren Tucker2fba9932005-02-02 23:30:24 +11001662 struct sockaddr_in *a4;
1663 struct sockaddr_in6 *a6;
1664 time_t t;
1665 struct stat fst;
1666
1667 if (geteuid() != 0)
1668 return;
1669 if ((fd = open(_PATH_BTMP, O_WRONLY | O_APPEND)) < 0) {
1670 debug("Unable to open the btmp file %s: %s", _PATH_BTMP,
1671 strerror(errno));
1672 return;
1673 }
1674 if (fstat(fd, &fst) < 0) {
1675 logit("%s: fstat of %s failed: %s", __func__, _PATH_BTMP,
1676 strerror(errno));
1677 goto out;
1678 }
Damien Miller88e341e2010-11-24 10:36:15 +11001679 if((fst.st_mode & (S_IXGRP | S_IRWXO)) || (fst.st_uid != 0)){
Darren Tucker2fba9932005-02-02 23:30:24 +11001680 logit("Excess permission or bad ownership on file %s",
1681 _PATH_BTMP);
1682 goto out;
1683 }
1684
1685 memset(&ut, 0, sizeof(ut));
1686 /* strncpy because we don't necessarily want nul termination */
1687 strncpy(ut.ut_user, username, sizeof(ut.ut_user));
1688 strlcpy(ut.ut_line, "ssh:notty", sizeof(ut.ut_line));
1689
1690 time(&t);
1691 ut.ut_time = t; /* ut_time is not always a time_t */
1692 ut.ut_type = LOGIN_PROCESS;
1693 ut.ut_pid = getpid();
1694
1695 /* strncpy because we don't necessarily want nul termination */
1696 strncpy(ut.ut_host, hostname, sizeof(ut.ut_host));
1697
1698 if (packet_connection_is_on_socket() &&
1699 getpeername(packet_get_connection_in(),
1700 (struct sockaddr *)&from, &fromlen) == 0) {
1701 ipv64_normalise_mapped(&from, &fromlen);
1702 if (from.ss_family == AF_INET) {
1703 a4 = (struct sockaddr_in *)&from;
1704 memcpy(&ut.ut_addr, &(a4->sin_addr),
1705 MIN_SIZEOF(ut.ut_addr, a4->sin_addr));
1706 }
1707#ifdef HAVE_ADDR_V6_IN_UTMP
1708 if (from.ss_family == AF_INET6) {
1709 a6 = (struct sockaddr_in6 *)&from;
1710 memcpy(&ut.ut_addr_v6, &(a6->sin6_addr),
1711 MIN_SIZEOF(ut.ut_addr_v6, a6->sin6_addr));
1712 }
1713#endif
1714 }
1715
1716 if (atomicio(vwrite, fd, &ut, sizeof(ut)) != sizeof(ut))
1717 error("Failed to write to %s: %s", _PATH_BTMP,
1718 strerror(errno));
1719
1720out:
1721 close(fd);
1722}
1723#endif /* USE_BTMP */