blob: 788553e9204db0c3ca5be1c38274a51f06c1bd3f [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>
Darren Tuckerc6f5f012015-12-15 13:59:12 +1100153#ifdef HAVE_SYS_TIME_H
154# include <sys/time.h>
155#endif
Damien Miller8ec8c3e2006-07-10 20:35:38 +1000156
157#include <netinet/in.h>
Damien Miller62772522006-03-15 14:01:11 +1100158
Darren Tucker2c1a02a2006-07-12 22:40:50 +1000159#include <errno.h>
Damien Millera1738e42006-07-10 21:33:04 +1000160#include <fcntl.h>
Darren Tuckerf19bbc32006-09-07 22:57:53 +1000161#ifdef HAVE_PATHS_H
162# include <paths.h>
163#endif
Damien Miller9f2abc42006-07-10 20:53:08 +1000164#include <pwd.h>
Damien Millerded319c2006-09-01 15:38:36 +1000165#include <stdarg.h>
Damien Millerb8fe89c2006-07-24 14:51:00 +1000166#include <string.h>
Darren Tuckerd757e692007-04-29 12:10:57 +1000167#include <time.h>
Damien Millerb8fe89c2006-07-24 14:51:00 +1000168#include <unistd.h>
Damien Miller9f2abc42006-07-10 20:53:08 +1000169
andre2ff7b5d2000-06-03 14:57:40 +0000170#include "xmalloc.h"
Damien Millerd7834352006-08-05 12:39:39 +1000171#include "key.h"
172#include "hostfile.h"
173#include "ssh.h"
andre2ff7b5d2000-06-03 14:57:40 +0000174#include "loginrec.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +0000175#include "log.h"
176#include "atomicio.h"
Darren Tucker2fba9932005-02-02 23:30:24 +1100177#include "packet.h"
178#include "canohost.h"
Darren Tucker269a1ea2005-02-03 00:20:53 +1100179#include "auth.h"
Darren Tuckera39f83e2005-02-15 22:19:28 +1100180#include "buffer.h"
andre2ff7b5d2000-06-03 14:57:40 +0000181
Ben Lindstromdcca9812000-11-10 03:28:31 +0000182#ifdef HAVE_UTIL_H
Damien Miller8899ed32004-09-12 15:18:55 +1000183# include <util.h>
Ben Lindstromdcca9812000-11-10 03:28:31 +0000184#endif
andre2ff7b5d2000-06-03 14:57:40 +0000185
186/**
187 ** prototypes for helper functions in this file
188 **/
189
190#if HAVE_UTMP_H
andre2ff7b5d2000-06-03 14:57:40 +0000191void set_utmp_time(struct logininfo *li, struct utmp *ut);
192void construct_utmp(struct logininfo *li, struct utmp *ut);
193#endif
194
195#ifdef HAVE_UTMPX_H
andre2ff7b5d2000-06-03 14:57:40 +0000196void set_utmpx_time(struct logininfo *li, struct utmpx *ut);
197void construct_utmpx(struct logininfo *li, struct utmpx *ut);
198#endif
199
200int utmp_write_entry(struct logininfo *li);
201int utmpx_write_entry(struct logininfo *li);
202int wtmp_write_entry(struct logininfo *li);
203int wtmpx_write_entry(struct logininfo *li);
204int lastlog_write_entry(struct logininfo *li);
205int syslogin_write_entry(struct logininfo *li);
206
207int getlast_entry(struct logininfo *li);
208int lastlog_get_entry(struct logininfo *li);
Darren Tucker261d93a2010-04-09 18:13:27 +1000209int utmpx_get_entry(struct logininfo *li);
andre2ff7b5d2000-06-03 14:57:40 +0000210int wtmp_get_entry(struct logininfo *li);
211int wtmpx_get_entry(struct logininfo *li);
212
Darren Tucker691d5232005-02-15 21:45:57 +1100213extern Buffer loginmsg;
214
andre6bb92372000-06-19 08:20:03 +0000215/* pick the shortest string */
Damien Miller8899ed32004-09-12 15:18:55 +1000216#define MIN_SIZEOF(s1,s2) (sizeof(s1) < sizeof(s2) ? sizeof(s1) : sizeof(s2))
andre6bb92372000-06-19 08:20:03 +0000217
andre2ff7b5d2000-06-03 14:57:40 +0000218/**
219 ** platform-independent login functions
220 **/
221
Damien Miller8899ed32004-09-12 15:18:55 +1000222/*
223 * login_login(struct logininfo *) - Record a login
Kevin Stevesef4eea92001-02-05 12:42:17 +0000224 *
andre6bb92372000-06-19 08:20:03 +0000225 * Call with a pointer to a struct logininfo initialised with
226 * login_init_entry() or login_alloc_entry()
227 *
228 * Returns:
229 * >0 if successful
230 * 0 on failure (will use OpenSSH's logging facilities for diagnostics)
231 */
andre61e67252000-06-04 17:07:49 +0000232int
Damien Miller8899ed32004-09-12 15:18:55 +1000233login_login(struct logininfo *li)
andre61e67252000-06-04 17:07:49 +0000234{
235 li->type = LTYPE_LOGIN;
Damien Miller8899ed32004-09-12 15:18:55 +1000236 return (login_write(li));
andre61e67252000-06-04 17:07:49 +0000237}
238
239
Damien Miller8899ed32004-09-12 15:18:55 +1000240/*
241 * login_logout(struct logininfo *) - Record a logout
andre6bb92372000-06-19 08:20:03 +0000242 *
243 * Call as with login_login()
244 *
245 * Returns:
246 * >0 if successful
247 * 0 on failure (will use OpenSSH's logging facilities for diagnostics)
248 */
andre61e67252000-06-04 17:07:49 +0000249int
250login_logout(struct logininfo *li)
251{
252 li->type = LTYPE_LOGOUT;
Damien Miller8899ed32004-09-12 15:18:55 +1000253 return (login_write(li));
andre61e67252000-06-04 17:07:49 +0000254}
255
Damien Miller8899ed32004-09-12 15:18:55 +1000256/*
257 * login_get_lastlog_time(int) - Retrieve the last login time
andre6bb92372000-06-19 08:20:03 +0000258 *
259 * Retrieve the last login time for the given uid. Will try to use the
260 * system lastlog facilities if they are available, but will fall back
261 * to looking in wtmp/wtmpx if necessary
262 *
263 * Returns:
264 * 0 on failure, or if user has never logged in
265 * Time in seconds from the epoch if successful
266 *
267 * Useful preprocessor symbols:
268 * DISABLE_LASTLOG: If set, *never* even try to retrieve lastlog
269 * info
270 * USE_LASTLOG: If set, indicates the presence of system lastlog
271 * facilities. If this and DISABLE_LASTLOG are not set,
272 * try to retrieve lastlog information from wtmp/wtmpx.
273 */
andre61e67252000-06-04 17:07:49 +0000274unsigned int
Damien Miller34ee4202010-11-05 10:52:37 +1100275login_get_lastlog_time(const uid_t uid)
andre61e67252000-06-04 17:07:49 +0000276{
277 struct logininfo li;
278
andre6bb92372000-06-19 08:20:03 +0000279 if (login_get_lastlog(&li, uid))
Damien Miller8899ed32004-09-12 15:18:55 +1000280 return (li.tv_sec);
andre6bb92372000-06-19 08:20:03 +0000281 else
Damien Miller8899ed32004-09-12 15:18:55 +1000282 return (0);
andre61e67252000-06-04 17:07:49 +0000283}
284
Damien Miller8899ed32004-09-12 15:18:55 +1000285/*
286 * login_get_lastlog(struct logininfo *, int) - Retrieve a lastlog entry
andre6bb92372000-06-19 08:20:03 +0000287 *
288 * Retrieve a logininfo structure populated (only partially) with
289 * information from the system lastlog data, or from wtmp/wtmpx if no
290 * system lastlog information exists.
291 *
292 * Note this routine must be given a pre-allocated logininfo.
293 *
294 * Returns:
295 * >0: A pointer to your struct logininfo if successful
296 * 0 on failure (will use OpenSSH's logging facilities for diagnostics)
andre6bb92372000-06-19 08:20:03 +0000297 */
andre61e67252000-06-04 17:07:49 +0000298struct logininfo *
Damien Miller34ee4202010-11-05 10:52:37 +1100299login_get_lastlog(struct logininfo *li, const uid_t uid)
andre61e67252000-06-04 17:07:49 +0000300{
andre6bb92372000-06-19 08:20:03 +0000301 struct passwd *pw;
andre6bb92372000-06-19 08:20:03 +0000302
Damien Miller348c9b72000-08-15 10:01:22 +1000303 memset(li, '\0', sizeof(*li));
andre61e67252000-06-04 17:07:49 +0000304 li->uid = uid;
andre6bb92372000-06-19 08:20:03 +0000305
Kevin Stevesef4eea92001-02-05 12:42:17 +0000306 /*
Damien Miller53c5d462000-06-28 00:50:50 +1000307 * If we don't have a 'real' lastlog, we need the username to
andre6bb92372000-06-19 08:20:03 +0000308 * reliably search wtmp(x) for the last login (see
Kevin Stevesef4eea92001-02-05 12:42:17 +0000309 * wtmp_get_entry().)
Damien Miller53c5d462000-06-28 00:50:50 +1000310 */
andre6bb92372000-06-19 08:20:03 +0000311 pw = getpwuid(uid);
Damien Millerdd47aa22000-06-27 11:18:27 +1000312 if (pw == NULL)
Damien Miller34ee4202010-11-05 10:52:37 +1100313 fatal("%s: Cannot find account for uid %ld", __func__,
314 (long)uid);
Kevin Stevesef4eea92001-02-05 12:42:17 +0000315
Damien Miller7d97fd92013-12-29 17:40:18 +1100316 if (strlcpy(li->username, pw->pw_name, sizeof(li->username)) >=
317 sizeof(li->username)) {
318 error("%s: username too long (%lu > max %lu)", __func__,
Darren Tucker1c4a0112014-01-17 12:23:23 +1100319 (unsigned long)strlen(pw->pw_name),
320 (unsigned long)sizeof(li->username) - 1);
Damien Miller7d97fd92013-12-29 17:40:18 +1100321 return NULL;
322 }
Damien Millerdd47aa22000-06-27 11:18:27 +1000323
andre61e67252000-06-04 17:07:49 +0000324 if (getlast_entry(li))
Damien Miller8899ed32004-09-12 15:18:55 +1000325 return (li);
andre61e67252000-06-04 17:07:49 +0000326 else
Damien Miller8899ed32004-09-12 15:18:55 +1000327 return (NULL);
andre61e67252000-06-04 17:07:49 +0000328}
329
Damien Miller8899ed32004-09-12 15:18:55 +1000330/*
331 * login_alloc_entry(int, char*, char*, char*) - Allocate and initialise
Kevin Stevesef4eea92001-02-05 12:42:17 +0000332 * a logininfo structure
333 *
andre6bb92372000-06-19 08:20:03 +0000334 * This function creates a new struct logininfo, a data structure
335 * meant to carry the information required to portably record login info.
336 *
337 * Returns a pointer to a newly created struct logininfo. If memory
338 * allocation fails, the program halts.
339 */
andre61e67252000-06-04 17:07:49 +0000340struct
Damien Miller34ee4202010-11-05 10:52:37 +1100341logininfo *login_alloc_entry(pid_t pid, const char *username,
Damien Miller8899ed32004-09-12 15:18:55 +1000342 const char *hostname, const char *line)
andre61e67252000-06-04 17:07:49 +0000343{
andre2ff7b5d2000-06-03 14:57:40 +0000344 struct logininfo *newli;
345
Damien Miller8899ed32004-09-12 15:18:55 +1000346 newli = xmalloc(sizeof(*newli));
347 login_init_entry(newli, pid, username, hostname, line);
348 return (newli);
andre61e67252000-06-04 17:07:49 +0000349}
andre2ff7b5d2000-06-03 14:57:40 +0000350
351
andre6bb92372000-06-19 08:20:03 +0000352/* login_free_entry(struct logininfo *) - free struct memory */
andre61e67252000-06-04 17:07:49 +0000353void
354login_free_entry(struct logininfo *li)
355{
Darren Tuckerf60845f2013-06-02 08:07:31 +1000356 free(li);
andre61e67252000-06-04 17:07:49 +0000357}
358
andre2ff7b5d2000-06-03 14:57:40 +0000359
andre6bb92372000-06-19 08:20:03 +0000360/* login_init_entry(struct logininfo *, int, char*, char*, char*)
361 * - initialise a struct logininfo
Kevin Stevesef4eea92001-02-05 12:42:17 +0000362 *
andre6bb92372000-06-19 08:20:03 +0000363 * Populates a new struct logininfo, a data structure meant to carry
364 * the information required to portably record login info.
365 *
366 * Returns: 1
367 */
andre61e67252000-06-04 17:07:49 +0000368int
Damien Miller34ee4202010-11-05 10:52:37 +1100369login_init_entry(struct logininfo *li, pid_t pid, const char *username,
Damien Miller8899ed32004-09-12 15:18:55 +1000370 const char *hostname, const char *line)
andre61e67252000-06-04 17:07:49 +0000371{
Damien Millerf8af08d2000-06-27 09:40:06 +1000372 struct passwd *pw;
Kevin Stevesef4eea92001-02-05 12:42:17 +0000373
Damien Miller348c9b72000-08-15 10:01:22 +1000374 memset(li, 0, sizeof(*li));
Kevin Stevesef4eea92001-02-05 12:42:17 +0000375
andre61e67252000-06-04 17:07:49 +0000376 li->pid = pid;
Damien Millerf8af08d2000-06-27 09:40:06 +1000377
andre2ff7b5d2000-06-03 14:57:40 +0000378 /* set the line information */
andre61e67252000-06-04 17:07:49 +0000379 if (line)
andre2ff7b5d2000-06-03 14:57:40 +0000380 line_fullname(li->line, line, sizeof(li->line));
andre2ff7b5d2000-06-03 14:57:40 +0000381
Damien Millerf8af08d2000-06-27 09:40:06 +1000382 if (username) {
andre2ff7b5d2000-06-03 14:57:40 +0000383 strlcpy(li->username, username, sizeof(li->username));
Damien Millerf8af08d2000-06-27 09:40:06 +1000384 pw = getpwnam(li->username);
Damien Miller8899ed32004-09-12 15:18:55 +1000385 if (pw == NULL) {
Damien Miller94cf4c82005-07-17 17:04:47 +1000386 fatal("%s: Cannot find user \"%s\"", __func__,
Damien Miller8899ed32004-09-12 15:18:55 +1000387 li->username);
388 }
Damien Millerf8af08d2000-06-27 09:40:06 +1000389 li->uid = pw->pw_uid;
390 }
Damien Millerdd47aa22000-06-27 11:18:27 +1000391
andre61e67252000-06-04 17:07:49 +0000392 if (hostname)
andre2ff7b5d2000-06-03 14:57:40 +0000393 strlcpy(li->hostname, hostname, sizeof(li->hostname));
Damien Millerf8af08d2000-06-27 09:40:06 +1000394
Damien Miller8899ed32004-09-12 15:18:55 +1000395 return (1);
andre2ff7b5d2000-06-03 14:57:40 +0000396}
397
Damien Miller94cf4c82005-07-17 17:04:47 +1000398/*
Damien Miller8899ed32004-09-12 15:18:55 +1000399 * login_set_current_time(struct logininfo *) - set the current time
andre6bb92372000-06-19 08:20:03 +0000400 *
401 * Set the current time in a logininfo structure. This function is
402 * meant to eliminate the need to deal with system dependencies for
403 * time handling.
404 */
andre2ff7b5d2000-06-03 14:57:40 +0000405void
andre61e67252000-06-04 17:07:49 +0000406login_set_current_time(struct logininfo *li)
407{
andre2ff7b5d2000-06-03 14:57:40 +0000408 struct timeval tv;
409
410 gettimeofday(&tv, NULL);
Kevin Stevesef4eea92001-02-05 12:42:17 +0000411
Damien Millerf8af08d2000-06-27 09:40:06 +1000412 li->tv_sec = tv.tv_sec;
413 li->tv_usec = tv.tv_usec;
andre2ff7b5d2000-06-03 14:57:40 +0000414}
415
andre61e67252000-06-04 17:07:49 +0000416/* copy a sockaddr_* into our logininfo */
andre2ff7b5d2000-06-03 14:57:40 +0000417void
andre61e67252000-06-04 17:07:49 +0000418login_set_addr(struct logininfo *li, const struct sockaddr *sa,
Damien Miller8899ed32004-09-12 15:18:55 +1000419 const unsigned int sa_size)
andre61e67252000-06-04 17:07:49 +0000420{
421 unsigned int bufsize = sa_size;
422
423 /* make sure we don't overrun our union */
424 if (sizeof(li->hostaddr) < sa_size)
425 bufsize = sizeof(li->hostaddr);
426
Damien Miller8899ed32004-09-12 15:18:55 +1000427 memcpy(&li->hostaddr.sa, sa, bufsize);
andre2ff7b5d2000-06-03 14:57:40 +0000428}
429
andre2ff7b5d2000-06-03 14:57:40 +0000430
andre61e67252000-06-04 17:07:49 +0000431/**
432 ** login_write: Call low-level recording functions based on autoconf
433 ** results
434 **/
andre2ff7b5d2000-06-03 14:57:40 +0000435int
Damien Miller8899ed32004-09-12 15:18:55 +1000436login_write(struct logininfo *li)
andre61e67252000-06-04 17:07:49 +0000437{
Damien Millerbac2d8a2000-09-05 16:13:06 +1100438#ifndef HAVE_CYGWIN
Damien Miller8899ed32004-09-12 15:18:55 +1000439 if (geteuid() != 0) {
440 logit("Attempt to write login records by non-root user (aborting)");
441 return (1);
andre2ff7b5d2000-06-03 14:57:40 +0000442 }
Damien Millerbac2d8a2000-09-05 16:13:06 +1100443#endif
Damien Millerdd47aa22000-06-27 11:18:27 +1000444
andre2ff7b5d2000-06-03 14:57:40 +0000445 /* set the timestamp */
446 login_set_current_time(li);
447#ifdef USE_LOGIN
448 syslogin_write_entry(li);
449#endif
450#ifdef USE_LASTLOG
Damien Miller8899ed32004-09-12 15:18:55 +1000451 if (li->type == LTYPE_LOGIN)
andre2ff7b5d2000-06-03 14:57:40 +0000452 lastlog_write_entry(li);
andre2ff7b5d2000-06-03 14:57:40 +0000453#endif
454#ifdef USE_UTMP
455 utmp_write_entry(li);
456#endif
457#ifdef USE_WTMP
458 wtmp_write_entry(li);
459#endif
460#ifdef USE_UTMPX
461 utmpx_write_entry(li);
462#endif
463#ifdef USE_WTMPX
464 wtmpx_write_entry(li);
465#endif
Darren Tucker397a2f22004-08-15 00:09:11 +1000466#ifdef CUSTOM_SYS_AUTH_RECORD_LOGIN
Damien Miller94cf4c82005-07-17 17:04:47 +1000467 if (li->type == LTYPE_LOGIN &&
Damien Millerb6f72f52005-07-17 17:26:43 +1000468 !sys_auth_record_login(li->username,li->hostname,li->line,
469 &loginmsg))
Darren Tucker397a2f22004-08-15 00:09:11 +1000470 logit("Writing login record failed for %s", li->username);
471#endif
Darren Tucker2e0cf0d2005-02-08 21:52:47 +1100472#ifdef SSH_AUDIT_EVENTS
Darren Tucker269a1ea2005-02-03 00:20:53 +1100473 if (li->type == LTYPE_LOGIN)
Darren Tuckerea52a822011-01-17 21:15:27 +1100474 audit_session_open(li);
Darren Tucker269a1ea2005-02-03 00:20:53 +1100475 else if (li->type == LTYPE_LOGOUT)
Darren Tuckerea52a822011-01-17 21:15:27 +1100476 audit_session_close(li);
Darren Tucker269a1ea2005-02-03 00:20:53 +1100477#endif
Damien Miller8899ed32004-09-12 15:18:55 +1000478 return (0);
andre2ff7b5d2000-06-03 14:57:40 +0000479}
480
Ben Lindstrom97c677d2001-05-08 20:33:05 +0000481#ifdef LOGIN_NEEDS_UTMPX
482int
483login_utmp_only(struct logininfo *li)
484{
Damien Millera8e06ce2003-11-21 23:48:55 +1100485 li->type = LTYPE_LOGIN;
Ben Lindstrom9197c592001-10-26 15:56:55 +0000486 login_set_current_time(li);
Ben Lindstrom97c677d2001-05-08 20:33:05 +0000487# ifdef USE_UTMP
488 utmp_write_entry(li);
489# endif
490# ifdef USE_WTMP
491 wtmp_write_entry(li);
492# endif
493# ifdef USE_UTMPX
494 utmpx_write_entry(li);
495# endif
496# ifdef USE_WTMPX
497 wtmpx_write_entry(li);
498# endif
Damien Miller8899ed32004-09-12 15:18:55 +1000499 return (0);
Ben Lindstrom97c677d2001-05-08 20:33:05 +0000500}
501#endif
502
andre2ff7b5d2000-06-03 14:57:40 +0000503/**
andre61e67252000-06-04 17:07:49 +0000504 ** getlast_entry: Call low-level functions to retrieve the last login
505 ** time.
andre2ff7b5d2000-06-03 14:57:40 +0000506 **/
507
andre61e67252000-06-04 17:07:49 +0000508/* take the uid in li and return the last login time */
509int
510getlast_entry(struct logininfo *li)
511{
512#ifdef USE_LASTLOG
Damien Miller53c5d462000-06-28 00:50:50 +1000513 return(lastlog_get_entry(li));
Damien Millerdd47aa22000-06-27 11:18:27 +1000514#else /* !USE_LASTLOG */
Darren Tucker261d93a2010-04-09 18:13:27 +1000515#if defined(USE_UTMPX) && defined(HAVE_SETUTXDB) && \
516 defined(UTXDB_LASTLOGIN) && defined(HAVE_GETUTXUSER)
517 return (utmpx_get_entry(li));
518#endif
andre61e67252000-06-04 17:07:49 +0000519
Damien Miller8899ed32004-09-12 15:18:55 +1000520#if defined(DISABLE_LASTLOG)
Kevin Stevesef4eea92001-02-05 12:42:17 +0000521 /* On some systems we shouldn't even try to obtain last login
andreecaabf12000-06-12 22:21:44 +0000522 * time, e.g. AIX */
Damien Miller8899ed32004-09-12 15:18:55 +1000523 return (0);
524# elif defined(USE_WTMP) && \
525 (defined(HAVE_TIME_IN_UTMP) || defined(HAVE_TV_IN_UTMP))
andre61e67252000-06-04 17:07:49 +0000526 /* retrieve last login time from utmp */
Damien Millerdd47aa22000-06-27 11:18:27 +1000527 return (wtmp_get_entry(li));
Damien Miller8899ed32004-09-12 15:18:55 +1000528# elif defined(USE_WTMPX) && \
529 (defined(HAVE_TIME_IN_UTMPX) || defined(HAVE_TV_IN_UTMPX))
andre61e67252000-06-04 17:07:49 +0000530 /* If wtmp isn't available, try wtmpx */
Damien Millerdd47aa22000-06-27 11:18:27 +1000531 return (wtmpx_get_entry(li));
Damien Miller8899ed32004-09-12 15:18:55 +1000532# else
andre61e67252000-06-04 17:07:49 +0000533 /* Give up: No means of retrieving last login time */
Damien Miller8899ed32004-09-12 15:18:55 +1000534 return (0);
Kevin Stevesef4eea92001-02-05 12:42:17 +0000535# endif /* DISABLE_LASTLOG */
Damien Millerdd47aa22000-06-27 11:18:27 +1000536#endif /* USE_LASTLOG */
andre61e67252000-06-04 17:07:49 +0000537}
538
539
540
andre2ff7b5d2000-06-03 14:57:40 +0000541/*
andre61e67252000-06-04 17:07:49 +0000542 * 'line' string utility functions
543 *
544 * These functions process the 'line' string into one of three forms:
545 *
andre2ff7b5d2000-06-03 14:57:40 +0000546 * 1. The full filename (including '/dev')
547 * 2. The stripped name (excluding '/dev')
andre61e67252000-06-04 17:07:49 +0000548 * 3. The abbreviated name (e.g. /dev/ttyp00 -> yp00
549 * /dev/pts/1 -> ts/1 )
andre2ff7b5d2000-06-03 14:57:40 +0000550 *
551 * Form 3 is used on some systems to identify a .tmp.? entry when
552 * attempting to remove it. Typically both addition and removal is
andre61e67252000-06-04 17:07:49 +0000553 * performed by one application - say, sshd - so as long as the choice
554 * uniquely identifies a terminal it's ok.
andre2ff7b5d2000-06-03 14:57:40 +0000555 */
556
557
Damien Miller8899ed32004-09-12 15:18:55 +1000558/*
559 * line_fullname(): add the leading '/dev/' if it doesn't exist make
560 * sure dst has enough space, if not just copy src (ugh)
561 */
andre2ff7b5d2000-06-03 14:57:40 +0000562char *
Damien Miller52c8afe2005-06-19 10:19:43 +1000563line_fullname(char *dst, const char *src, u_int dstsize)
andre61e67252000-06-04 17:07:49 +0000564{
andre2ff7b5d2000-06-03 14:57:40 +0000565 memset(dst, '\0', dstsize);
Damien Miller8899ed32004-09-12 15:18:55 +1000566 if ((strncmp(src, "/dev/", 5) == 0) || (dstsize < (strlen(src) + 5)))
andre2ff7b5d2000-06-03 14:57:40 +0000567 strlcpy(dst, src, dstsize);
Damien Miller8899ed32004-09-12 15:18:55 +1000568 else {
Damien Miller1a132252000-06-13 21:23:17 +1000569 strlcpy(dst, "/dev/", dstsize);
andre2ff7b5d2000-06-03 14:57:40 +0000570 strlcat(dst, src, dstsize);
571 }
Damien Miller8899ed32004-09-12 15:18:55 +1000572 return (dst);
andre2ff7b5d2000-06-03 14:57:40 +0000573}
574
andre61e67252000-06-04 17:07:49 +0000575/* line_stripname(): strip the leading '/dev' if it exists, return dst */
andre2ff7b5d2000-06-03 14:57:40 +0000576char *
andre61e67252000-06-04 17:07:49 +0000577line_stripname(char *dst, const char *src, int dstsize)
578{
andre2ff7b5d2000-06-03 14:57:40 +0000579 memset(dst, '\0', dstsize);
580 if (strncmp(src, "/dev/", 5) == 0)
Damien Millerf5a81472000-09-30 21:34:44 +1100581 strlcpy(dst, src + 5, dstsize);
andre2ff7b5d2000-06-03 14:57:40 +0000582 else
583 strlcpy(dst, src, dstsize);
Damien Miller8899ed32004-09-12 15:18:55 +1000584 return (dst);
andre61e67252000-06-04 17:07:49 +0000585}
586
Damien Miller94cf4c82005-07-17 17:04:47 +1000587/*
Damien Miller8899ed32004-09-12 15:18:55 +1000588 * line_abbrevname(): Return the abbreviated (usually four-character)
andre61e67252000-06-04 17:07:49 +0000589 * form of the line (Just use the last <dstsize> characters of the
590 * full name.)
591 *
592 * NOTE: use strncpy because we do NOT necessarily want zero
Damien Miller8899ed32004-09-12 15:18:55 +1000593 * termination
594 */
andre2ff7b5d2000-06-03 14:57:40 +0000595char *
Kevin Stevesef4eea92001-02-05 12:42:17 +0000596line_abbrevname(char *dst, const char *src, int dstsize)
Damien Millerdd47aa22000-06-27 11:18:27 +1000597{
598 size_t len;
Kevin Stevesef4eea92001-02-05 12:42:17 +0000599
andre2ff7b5d2000-06-03 14:57:40 +0000600 memset(dst, '\0', dstsize);
Kevin Stevesef4eea92001-02-05 12:42:17 +0000601
Damien Miller8e81ed32000-07-01 13:17:42 +1000602 /* Always skip prefix if present */
603 if (strncmp(src, "/dev/", 5) == 0)
604 src += 5;
Kevin Stevesef4eea92001-02-05 12:42:17 +0000605
Damien Millerf1b9d112002-04-23 23:09:19 +1000606#ifdef WITH_ABBREV_NO_TTY
607 if (strncmp(src, "tty", 3) == 0)
608 src += 3;
609#endif
610
Damien Millerdd47aa22000-06-27 11:18:27 +1000611 len = strlen(src);
612
Damien Miller8e81ed32000-07-01 13:17:42 +1000613 if (len > 0) {
614 if (((int)len - dstsize) > 0)
615 src += ((int)len - dstsize);
616
617 /* note: _don't_ change this to strlcpy */
Kevin Stevesef4eea92001-02-05 12:42:17 +0000618 strncpy(dst, src, (size_t)dstsize);
Damien Millerdd47aa22000-06-27 11:18:27 +1000619 }
Kevin Stevesef4eea92001-02-05 12:42:17 +0000620
Damien Miller8899ed32004-09-12 15:18:55 +1000621 return (dst);
andre2ff7b5d2000-06-03 14:57:40 +0000622}
623
andre2ff7b5d2000-06-03 14:57:40 +0000624/**
625 ** utmp utility functions
andre61e67252000-06-04 17:07:49 +0000626 **
627 ** These functions manipulate struct utmp, taking system differences
628 ** into account.
andre2ff7b5d2000-06-03 14:57:40 +0000629 **/
630
631#if defined(USE_UTMP) || defined (USE_WTMP) || defined (USE_LOGIN)
632
andre2ff7b5d2000-06-03 14:57:40 +0000633/* build the utmp structure */
634void
andre61e67252000-06-04 17:07:49 +0000635set_utmp_time(struct logininfo *li, struct utmp *ut)
636{
Damien Miller8899ed32004-09-12 15:18:55 +1000637# if defined(HAVE_TV_IN_UTMP)
andre2ff7b5d2000-06-03 14:57:40 +0000638 ut->ut_tv.tv_sec = li->tv_sec;
639 ut->ut_tv.tv_usec = li->tv_usec;
Damien Miller8899ed32004-09-12 15:18:55 +1000640# elif defined(HAVE_TIME_IN_UTMP)
andre2ff7b5d2000-06-03 14:57:40 +0000641 ut->ut_time = li->tv_sec;
Damien Millerdd47aa22000-06-27 11:18:27 +1000642# endif
andre2ff7b5d2000-06-03 14:57:40 +0000643}
644
645void
646construct_utmp(struct logininfo *li,
andre61e67252000-06-04 17:07:49 +0000647 struct utmp *ut)
648{
Damien Miller02e16ad2003-01-03 14:42:27 +1100649# ifdef HAVE_ADDR_V6_IN_UTMP
650 struct sockaddr_in6 *sa6;
Damien Miller8899ed32004-09-12 15:18:55 +1000651# endif
652
Damien Miller348c9b72000-08-15 10:01:22 +1000653 memset(ut, '\0', sizeof(*ut));
andre6bb92372000-06-19 08:20:03 +0000654
655 /* First fill out fields used for both logins and logouts */
656
Damien Millerdd47aa22000-06-27 11:18:27 +1000657# ifdef HAVE_ID_IN_UTMP
andre2ff7b5d2000-06-03 14:57:40 +0000658 line_abbrevname(ut->ut_id, li->line, sizeof(ut->ut_id));
Damien Millerdd47aa22000-06-27 11:18:27 +1000659# endif
andre2ff7b5d2000-06-03 14:57:40 +0000660
Damien Millerdd47aa22000-06-27 11:18:27 +1000661# ifdef HAVE_TYPE_IN_UTMP
andre6bb92372000-06-19 08:20:03 +0000662 /* This is done here to keep utmp constants out of struct logininfo */
andre2ff7b5d2000-06-03 14:57:40 +0000663 switch (li->type) {
664 case LTYPE_LOGIN:
665 ut->ut_type = USER_PROCESS;
Tim Rice81ed5182002-09-25 17:38:46 -0700666#ifdef _UNICOS
Ben Lindstrom6db66ff2001-08-06 23:29:16 +0000667 cray_set_tmpdir(ut);
668#endif
andre2ff7b5d2000-06-03 14:57:40 +0000669 break;
670 case LTYPE_LOGOUT:
671 ut->ut_type = DEAD_PROCESS;
Tim Rice81ed5182002-09-25 17:38:46 -0700672#ifdef _UNICOS
Ben Lindstrom6db66ff2001-08-06 23:29:16 +0000673 cray_retain_utmp(ut, li->pid);
674#endif
andre2ff7b5d2000-06-03 14:57:40 +0000675 break;
676 }
Damien Millerdd47aa22000-06-27 11:18:27 +1000677# endif
andre6bb92372000-06-19 08:20:03 +0000678 set_utmp_time(li, ut);
andre2ff7b5d2000-06-03 14:57:40 +0000679
andre6bb92372000-06-19 08:20:03 +0000680 line_stripname(ut->ut_line, li->line, sizeof(ut->ut_line));
Damien Millerdd47aa22000-06-27 11:18:27 +1000681
682# ifdef HAVE_PID_IN_UTMP
andre2ff7b5d2000-06-03 14:57:40 +0000683 ut->ut_pid = li->pid;
Damien Millerdd47aa22000-06-27 11:18:27 +1000684# endif
andre6bb92372000-06-19 08:20:03 +0000685
686 /* If we're logging out, leave all other fields blank */
687 if (li->type == LTYPE_LOGOUT)
Damien Miller8899ed32004-09-12 15:18:55 +1000688 return;
andre6bb92372000-06-19 08:20:03 +0000689
Damien Millerdd47aa22000-06-27 11:18:27 +1000690 /*
691 * These fields are only used when logging in, and are blank
Kevin Stevesef4eea92001-02-05 12:42:17 +0000692 * for logouts.
Damien Millerdd47aa22000-06-27 11:18:27 +1000693 */
andre6bb92372000-06-19 08:20:03 +0000694
695 /* Use strncpy because we don't necessarily want null termination */
Damien Miller8899ed32004-09-12 15:18:55 +1000696 strncpy(ut->ut_name, li->username,
697 MIN_SIZEOF(ut->ut_name, li->username));
Damien Millerdd47aa22000-06-27 11:18:27 +1000698# ifdef HAVE_HOST_IN_UTMP
Damien Miller8899ed32004-09-12 15:18:55 +1000699 strncpy(ut->ut_host, li->hostname,
700 MIN_SIZEOF(ut->ut_host, li->hostname));
Damien Millerdd47aa22000-06-27 11:18:27 +1000701# endif
702# ifdef HAVE_ADDR_IN_UTMP
andre61e67252000-06-04 17:07:49 +0000703 /* this is just a 32-bit IP address */
704 if (li->hostaddr.sa.sa_family == AF_INET)
705 ut->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr;
Kevin Stevesef4eea92001-02-05 12:42:17 +0000706# endif
Damien Miller02e16ad2003-01-03 14:42:27 +1100707# ifdef HAVE_ADDR_V6_IN_UTMP
708 /* this is just a 128-bit IPv6 address */
709 if (li->hostaddr.sa.sa_family == AF_INET6) {
710 sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa);
711 memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16);
712 if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) {
713 ut->ut_addr_v6[0] = ut->ut_addr_v6[3];
714 ut->ut_addr_v6[1] = 0;
715 ut->ut_addr_v6[2] = 0;
716 ut->ut_addr_v6[3] = 0;
717 }
718 }
719# endif
andre61e67252000-06-04 17:07:49 +0000720}
Damien Millerdd47aa22000-06-27 11:18:27 +1000721#endif /* USE_UTMP || USE_WTMP || USE_LOGIN */
andre61e67252000-06-04 17:07:49 +0000722
andre2ff7b5d2000-06-03 14:57:40 +0000723/**
724 ** utmpx utility functions
andre61e67252000-06-04 17:07:49 +0000725 **
726 ** These functions manipulate struct utmpx, accounting for system
727 ** variations.
andre2ff7b5d2000-06-03 14:57:40 +0000728 **/
729
730#if defined(USE_UTMPX) || defined (USE_WTMPX)
andre2ff7b5d2000-06-03 14:57:40 +0000731/* build the utmpx structure */
732void
andre61e67252000-06-04 17:07:49 +0000733set_utmpx_time(struct logininfo *li, struct utmpx *utx)
734{
Damien Miller8899ed32004-09-12 15:18:55 +1000735# if defined(HAVE_TV_IN_UTMPX)
andre2ff7b5d2000-06-03 14:57:40 +0000736 utx->ut_tv.tv_sec = li->tv_sec;
737 utx->ut_tv.tv_usec = li->tv_usec;
Damien Miller8899ed32004-09-12 15:18:55 +1000738# elif defined(HAVE_TIME_IN_UTMPX)
andre2ff7b5d2000-06-03 14:57:40 +0000739 utx->ut_time = li->tv_sec;
Damien Miller8899ed32004-09-12 15:18:55 +1000740# endif
andre2ff7b5d2000-06-03 14:57:40 +0000741}
742
andre61e67252000-06-04 17:07:49 +0000743void
744construct_utmpx(struct logininfo *li, struct utmpx *utx)
745{
Damien Miller02e16ad2003-01-03 14:42:27 +1100746# ifdef HAVE_ADDR_V6_IN_UTMP
747 struct sockaddr_in6 *sa6;
748# endif
Damien Miller348c9b72000-08-15 10:01:22 +1000749 memset(utx, '\0', sizeof(*utx));
Damien Miller8899ed32004-09-12 15:18:55 +1000750
Damien Miller8e81ed32000-07-01 13:17:42 +1000751# ifdef HAVE_ID_IN_UTMPX
andre2ff7b5d2000-06-03 14:57:40 +0000752 line_abbrevname(utx->ut_id, li->line, sizeof(utx->ut_id));
Damien Miller8e81ed32000-07-01 13:17:42 +1000753# endif
andre2ff7b5d2000-06-03 14:57:40 +0000754
755 /* this is done here to keep utmp constants out of loginrec.h */
756 switch (li->type) {
757 case LTYPE_LOGIN:
758 utx->ut_type = USER_PROCESS;
759 break;
760 case LTYPE_LOGOUT:
761 utx->ut_type = DEAD_PROCESS;
762 break;
763 }
andre2ff7b5d2000-06-03 14:57:40 +0000764 line_stripname(utx->ut_line, li->line, sizeof(utx->ut_line));
andre2ff7b5d2000-06-03 14:57:40 +0000765 set_utmpx_time(li, utx);
andre6bb92372000-06-19 08:20:03 +0000766 utx->ut_pid = li->pid;
Damien Miller8899ed32004-09-12 15:18:55 +1000767
Tim Ricee06ae4a2002-02-24 17:56:46 -0800768 /* strncpy(): Don't necessarily want null termination */
Darren Tucker0b8a2262010-01-09 18:18:04 +1100769 strncpy(utx->ut_user, li->username,
770 MIN_SIZEOF(utx->ut_user, li->username));
andre6bb92372000-06-19 08:20:03 +0000771
772 if (li->type == LTYPE_LOGOUT)
773 return;
774
Damien Millerdd47aa22000-06-27 11:18:27 +1000775 /*
776 * These fields are only used when logging in, and are blank
Kevin Stevesef4eea92001-02-05 12:42:17 +0000777 * for logouts.
Damien Millerdd47aa22000-06-27 11:18:27 +1000778 */
andre6bb92372000-06-19 08:20:03 +0000779
Damien Millerdd47aa22000-06-27 11:18:27 +1000780# ifdef HAVE_HOST_IN_UTMPX
Damien Miller8899ed32004-09-12 15:18:55 +1000781 strncpy(utx->ut_host, li->hostname,
782 MIN_SIZEOF(utx->ut_host, li->hostname));
Damien Millerdd47aa22000-06-27 11:18:27 +1000783# endif
784# ifdef HAVE_ADDR_IN_UTMPX
Damien Millerd6f204d2000-09-23 13:57:27 +1100785 /* this is just a 32-bit IP address */
786 if (li->hostaddr.sa.sa_family == AF_INET)
787 utx->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr;
Damien Millerdd47aa22000-06-27 11:18:27 +1000788# endif
Damien Miller02e16ad2003-01-03 14:42:27 +1100789# ifdef HAVE_ADDR_V6_IN_UTMP
790 /* this is just a 128-bit IPv6 address */
791 if (li->hostaddr.sa.sa_family == AF_INET6) {
792 sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa);
Damien Millerc528c1b2014-12-23 15:26:13 +1100793 memcpy(utx->ut_addr_v6, sa6->sin6_addr.s6_addr, 16);
Damien Miller02e16ad2003-01-03 14:42:27 +1100794 if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) {
Damien Millerc528c1b2014-12-23 15:26:13 +1100795 utx->ut_addr_v6[0] = utx->ut_addr_v6[3];
796 utx->ut_addr_v6[1] = 0;
797 utx->ut_addr_v6[2] = 0;
798 utx->ut_addr_v6[3] = 0;
Damien Miller02e16ad2003-01-03 14:42:27 +1100799 }
800 }
801# endif
Damien Millerdd47aa22000-06-27 11:18:27 +1000802# ifdef HAVE_SYSLEN_IN_UTMPX
andre6bb92372000-06-19 08:20:03 +0000803 /* ut_syslen is the length of the utx_host string */
804 utx->ut_syslen = MIN(strlen(li->hostname), sizeof(utx->ut_host));
Damien Millerdd47aa22000-06-27 11:18:27 +1000805# endif
andre61e67252000-06-04 17:07:49 +0000806}
Damien Millerdd47aa22000-06-27 11:18:27 +1000807#endif /* USE_UTMPX || USE_WTMPX */
andre2ff7b5d2000-06-03 14:57:40 +0000808
809/**
andre61e67252000-06-04 17:07:49 +0000810 ** Low-level utmp functions
andre2ff7b5d2000-06-03 14:57:40 +0000811 **/
812
813/* FIXME: (ATL) utmp_write_direct needs testing */
andre2ff7b5d2000-06-03 14:57:40 +0000814#ifdef USE_UTMP
815
andre2ff7b5d2000-06-03 14:57:40 +0000816/* if we can, use pututline() etc. */
Damien Millerdd47aa22000-06-27 11:18:27 +1000817# if !defined(DISABLE_PUTUTLINE) && defined(HAVE_SETUTENT) && \
818 defined(HAVE_PUTUTLINE)
andre2ff7b5d2000-06-03 14:57:40 +0000819# define UTMP_USE_LIBRARY
Damien Millerdd47aa22000-06-27 11:18:27 +1000820# endif
andre2ff7b5d2000-06-03 14:57:40 +0000821
822
823/* write a utmp entry with the system's help (pututline() and pals) */
Damien Millerdd47aa22000-06-27 11:18:27 +1000824# ifdef UTMP_USE_LIBRARY
andre2ff7b5d2000-06-03 14:57:40 +0000825static int
andre61e67252000-06-04 17:07:49 +0000826utmp_write_library(struct logininfo *li, struct utmp *ut)
827{
andre2ff7b5d2000-06-03 14:57:40 +0000828 setutent();
829 pututline(ut);
Damien Millerdd47aa22000-06-27 11:18:27 +1000830# ifdef HAVE_ENDUTENT
andre2ff7b5d2000-06-03 14:57:40 +0000831 endutent();
Damien Millerdd47aa22000-06-27 11:18:27 +1000832# endif
Damien Miller8899ed32004-09-12 15:18:55 +1000833 return (1);
andre61e67252000-06-04 17:07:49 +0000834}
Damien Millerdd47aa22000-06-27 11:18:27 +1000835# else /* UTMP_USE_LIBRARY */
andre2ff7b5d2000-06-03 14:57:40 +0000836
Damien Miller94cf4c82005-07-17 17:04:47 +1000837/*
Damien Miller8899ed32004-09-12 15:18:55 +1000838 * Write a utmp entry direct to the file
839 * This is a slightly modification of code in OpenBSD's login.c
840 */
andre2ff7b5d2000-06-03 14:57:40 +0000841static int
andre61e67252000-06-04 17:07:49 +0000842utmp_write_direct(struct logininfo *li, struct utmp *ut)
843{
andre2ff7b5d2000-06-03 14:57:40 +0000844 struct utmp old_ut;
845 register int fd;
846 int tty;
847
andre6bb92372000-06-19 08:20:03 +0000848 /* FIXME: (ATL) ttyslot() needs local implementation */
Damien Miller348c9b72000-08-15 10:01:22 +1000849
Damien Millere5192fa2000-08-29 14:30:37 +1100850#if defined(HAVE_GETTTYENT)
Damien Miller8899ed32004-09-12 15:18:55 +1000851 struct ttyent *ty;
Damien Miller348c9b72000-08-15 10:01:22 +1000852
853 tty=0;
Damien Miller348c9b72000-08-15 10:01:22 +1000854 setttyent();
Damien Miller8899ed32004-09-12 15:18:55 +1000855 while (NULL != (ty = getttyent())) {
Damien Miller348c9b72000-08-15 10:01:22 +1000856 tty++;
857 if (!strncmp(ty->ty_name, ut->ut_line, sizeof(ut->ut_line)))
858 break;
859 }
860 endttyent();
861
Damien Miller8899ed32004-09-12 15:18:55 +1000862 if (NULL == ty) {
Damien Miller81409592004-08-15 19:12:52 +1000863 logit("%s: tty not found", __func__);
864 return (0);
Damien Miller348c9b72000-08-15 10:01:22 +1000865 }
866#else /* FIXME */
867
andre2ff7b5d2000-06-03 14:57:40 +0000868 tty = ttyslot(); /* seems only to work for /dev/ttyp? style names */
869
Damien Millere5192fa2000-08-29 14:30:37 +1100870#endif /* HAVE_GETTTYENT */
Damien Miller348c9b72000-08-15 10:01:22 +1000871
andre2ff7b5d2000-06-03 14:57:40 +0000872 if (tty > 0 && (fd = open(UTMP_FILE, O_RDWR|O_CREAT, 0644)) >= 0) {
Damien Miller81409592004-08-15 19:12:52 +1000873 off_t pos, ret;
874
875 pos = (off_t)tty * sizeof(struct utmp);
876 if ((ret = lseek(fd, pos, SEEK_SET)) == -1) {
Damien Millerb0419f22004-08-23 21:53:28 +1000877 logit("%s: lseek: %s", __func__, strerror(errno));
Damien Miller4a06f922011-01-02 21:43:59 +1100878 close(fd);
Damien Miller81409592004-08-15 19:12:52 +1000879 return (0);
880 }
881 if (ret != pos) {
Damien Miller94cf4c82005-07-17 17:04:47 +1000882 logit("%s: Couldn't seek to tty %d slot in %s",
Damien Millerb0419f22004-08-23 21:53:28 +1000883 __func__, tty, UTMP_FILE);
Damien Miller4a06f922011-01-02 21:43:59 +1100884 close(fd);
Damien Miller81409592004-08-15 19:12:52 +1000885 return (0);
886 }
andre2ff7b5d2000-06-03 14:57:40 +0000887 /*
888 * Prevent luser from zero'ing out ut_host.
889 * If the new ut_line is empty but the old one is not
Damien Miller7a0e5dc2000-07-11 12:15:54 +1000890 * and ut_line and ut_name match, preserve the old ut_line.
andre2ff7b5d2000-06-03 14:57:40 +0000891 */
Kevin Stevesef4eea92001-02-05 12:42:17 +0000892 if (atomicio(read, fd, &old_ut, sizeof(old_ut)) == sizeof(old_ut) &&
Damien Miller8899ed32004-09-12 15:18:55 +1000893 (ut->ut_host[0] == '\0') && (old_ut.ut_host[0] != '\0') &&
894 (strncmp(old_ut.ut_line, ut->ut_line, sizeof(ut->ut_line)) == 0) &&
895 (strncmp(old_ut.ut_name, ut->ut_name, sizeof(ut->ut_name)) == 0))
896 memcpy(ut->ut_host, old_ut.ut_host, sizeof(ut->ut_host));
Kevin Stevesef4eea92001-02-05 12:42:17 +0000897
Damien Miller81409592004-08-15 19:12:52 +1000898 if ((ret = lseek(fd, pos, SEEK_SET)) == -1) {
Damien Millerb0419f22004-08-23 21:53:28 +1000899 logit("%s: lseek: %s", __func__, strerror(errno));
Damien Miller4a06f922011-01-02 21:43:59 +1100900 close(fd);
Damien Miller81409592004-08-15 19:12:52 +1000901 return (0);
902 }
903 if (ret != pos) {
Damien Millerb0419f22004-08-23 21:53:28 +1000904 logit("%s: Couldn't seek to tty %d slot in %s",
Damien Miller81409592004-08-15 19:12:52 +1000905 __func__, tty, UTMP_FILE);
Damien Miller4a06f922011-01-02 21:43:59 +1100906 close(fd);
Damien Miller81409592004-08-15 19:12:52 +1000907 return (0);
908 }
Damien Miller8899ed32004-09-12 15:18:55 +1000909 if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) {
Damien Miller81409592004-08-15 19:12:52 +1000910 logit("%s: error writing %s: %s", __func__,
andre6bb92372000-06-19 08:20:03 +0000911 UTMP_FILE, strerror(errno));
Damien Miller4a06f922011-01-02 21:43:59 +1100912 close(fd);
913 return (0);
Damien Miller8899ed32004-09-12 15:18:55 +1000914 }
Kevin Stevesef4eea92001-02-05 12:42:17 +0000915
Damien Miller8899ed32004-09-12 15:18:55 +1000916 close(fd);
917 return (1);
Damien Miller53c5d462000-06-28 00:50:50 +1000918 } else {
Damien Miller8899ed32004-09-12 15:18:55 +1000919 return (0);
Damien Miller53c5d462000-06-28 00:50:50 +1000920 }
andre61e67252000-06-04 17:07:49 +0000921}
Damien Millerdd47aa22000-06-27 11:18:27 +1000922# endif /* UTMP_USE_LIBRARY */
andre2ff7b5d2000-06-03 14:57:40 +0000923
924static int
andre61e67252000-06-04 17:07:49 +0000925utmp_perform_login(struct logininfo *li)
926{
andre2ff7b5d2000-06-03 14:57:40 +0000927 struct utmp ut;
928
929 construct_utmp(li, &ut);
Damien Millerdd47aa22000-06-27 11:18:27 +1000930# ifdef UTMP_USE_LIBRARY
andre2ff7b5d2000-06-03 14:57:40 +0000931 if (!utmp_write_library(li, &ut)) {
Damien Miller6b0279c2004-09-12 15:25:17 +1000932 logit("%s: utmp_write_library() failed", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +1000933 return (0);
andre2ff7b5d2000-06-03 14:57:40 +0000934 }
Damien Millerdd47aa22000-06-27 11:18:27 +1000935# else
andre2ff7b5d2000-06-03 14:57:40 +0000936 if (!utmp_write_direct(li, &ut)) {
Damien Miller6b0279c2004-09-12 15:25:17 +1000937 logit("%s: utmp_write_direct() failed", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +1000938 return (0);
andre2ff7b5d2000-06-03 14:57:40 +0000939 }
Damien Millerdd47aa22000-06-27 11:18:27 +1000940# endif
Damien Miller8899ed32004-09-12 15:18:55 +1000941 return (1);
andre61e67252000-06-04 17:07:49 +0000942}
andre2ff7b5d2000-06-03 14:57:40 +0000943
944
945static int
andre61e67252000-06-04 17:07:49 +0000946utmp_perform_logout(struct logininfo *li)
947{
andre2ff7b5d2000-06-03 14:57:40 +0000948 struct utmp ut;
949
andre6bb92372000-06-19 08:20:03 +0000950 construct_utmp(li, &ut);
Damien Millerdd47aa22000-06-27 11:18:27 +1000951# ifdef UTMP_USE_LIBRARY
andre6bb92372000-06-19 08:20:03 +0000952 if (!utmp_write_library(li, &ut)) {
Damien Miller6b0279c2004-09-12 15:25:17 +1000953 logit("%s: utmp_write_library() failed", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +1000954 return (0);
andre6bb92372000-06-19 08:20:03 +0000955 }
Damien Millerdd47aa22000-06-27 11:18:27 +1000956# else
andre6bb92372000-06-19 08:20:03 +0000957 if (!utmp_write_direct(li, &ut)) {
Damien Miller6b0279c2004-09-12 15:25:17 +1000958 logit("%s: utmp_write_direct() failed", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +1000959 return (0);
andre6bb92372000-06-19 08:20:03 +0000960 }
Damien Millerdd47aa22000-06-27 11:18:27 +1000961# endif
Damien Miller8899ed32004-09-12 15:18:55 +1000962 return (1);
andre61e67252000-06-04 17:07:49 +0000963}
andre2ff7b5d2000-06-03 14:57:40 +0000964
965
966int
andre61e67252000-06-04 17:07:49 +0000967utmp_write_entry(struct logininfo *li)
968{
andre2ff7b5d2000-06-03 14:57:40 +0000969 switch(li->type) {
970 case LTYPE_LOGIN:
Damien Miller8899ed32004-09-12 15:18:55 +1000971 return (utmp_perform_login(li));
andre2ff7b5d2000-06-03 14:57:40 +0000972
973 case LTYPE_LOGOUT:
Damien Miller8899ed32004-09-12 15:18:55 +1000974 return (utmp_perform_logout(li));
andre2ff7b5d2000-06-03 14:57:40 +0000975
976 default:
Damien Miller6b0279c2004-09-12 15:25:17 +1000977 logit("%s: invalid type field", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +1000978 return (0);
andre2ff7b5d2000-06-03 14:57:40 +0000979 }
andre61e67252000-06-04 17:07:49 +0000980}
Damien Millerdd47aa22000-06-27 11:18:27 +1000981#endif /* USE_UTMP */
andre2ff7b5d2000-06-03 14:57:40 +0000982
983
984/**
andre61e67252000-06-04 17:07:49 +0000985 ** Low-level utmpx functions
andre2ff7b5d2000-06-03 14:57:40 +0000986 **/
987
988/* not much point if we don't want utmpx entries */
989#ifdef USE_UTMPX
990
andre2ff7b5d2000-06-03 14:57:40 +0000991/* if we have the wherewithall, use pututxline etc. */
Damien Millerdd47aa22000-06-27 11:18:27 +1000992# if !defined(DISABLE_PUTUTXLINE) && defined(HAVE_SETUTXENT) && \
993 defined(HAVE_PUTUTXLINE)
andre2ff7b5d2000-06-03 14:57:40 +0000994# define UTMPX_USE_LIBRARY
Damien Millerdd47aa22000-06-27 11:18:27 +1000995# endif
andre2ff7b5d2000-06-03 14:57:40 +0000996
997
998/* write a utmpx entry with the system's help (pututxline() and pals) */
Damien Millerdd47aa22000-06-27 11:18:27 +1000999# ifdef UTMPX_USE_LIBRARY
andre2ff7b5d2000-06-03 14:57:40 +00001000static int
andre61e67252000-06-04 17:07:49 +00001001utmpx_write_library(struct logininfo *li, struct utmpx *utx)
1002{
andre2ff7b5d2000-06-03 14:57:40 +00001003 setutxent();
1004 pututxline(utx);
1005
Damien Millerdd47aa22000-06-27 11:18:27 +10001006# ifdef HAVE_ENDUTXENT
andre2ff7b5d2000-06-03 14:57:40 +00001007 endutxent();
Damien Millerdd47aa22000-06-27 11:18:27 +10001008# endif
Damien Miller8899ed32004-09-12 15:18:55 +10001009 return (1);
andre61e67252000-06-04 17:07:49 +00001010}
andre2ff7b5d2000-06-03 14:57:40 +00001011
Damien Millerdd47aa22000-06-27 11:18:27 +10001012# else /* UTMPX_USE_LIBRARY */
andre2ff7b5d2000-06-03 14:57:40 +00001013
1014/* write a utmp entry direct to the file */
1015static int
andre61e67252000-06-04 17:07:49 +00001016utmpx_write_direct(struct logininfo *li, struct utmpx *utx)
Kevin Stevesef4eea92001-02-05 12:42:17 +00001017{
Damien Miller6b0279c2004-09-12 15:25:17 +10001018 logit("%s: not implemented!", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001019 return (0);
andre61e67252000-06-04 17:07:49 +00001020}
Damien Millerdd47aa22000-06-27 11:18:27 +10001021# endif /* UTMPX_USE_LIBRARY */
andre2ff7b5d2000-06-03 14:57:40 +00001022
1023static int
andre61e67252000-06-04 17:07:49 +00001024utmpx_perform_login(struct logininfo *li)
1025{
andre2ff7b5d2000-06-03 14:57:40 +00001026 struct utmpx utx;
1027
1028 construct_utmpx(li, &utx);
Damien Millerdd47aa22000-06-27 11:18:27 +10001029# ifdef UTMPX_USE_LIBRARY
andre2ff7b5d2000-06-03 14:57:40 +00001030 if (!utmpx_write_library(li, &utx)) {
Damien Miller6b0279c2004-09-12 15:25:17 +10001031 logit("%s: utmp_write_library() failed", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001032 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001033 }
Damien Millerdd47aa22000-06-27 11:18:27 +10001034# else
andre2ff7b5d2000-06-03 14:57:40 +00001035 if (!utmpx_write_direct(li, &ut)) {
Damien Miller6b0279c2004-09-12 15:25:17 +10001036 logit("%s: utmp_write_direct() failed", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001037 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001038 }
Damien Millerdd47aa22000-06-27 11:18:27 +10001039# endif
Damien Miller8899ed32004-09-12 15:18:55 +10001040 return (1);
andre61e67252000-06-04 17:07:49 +00001041}
andre2ff7b5d2000-06-03 14:57:40 +00001042
1043
1044static int
andre61e67252000-06-04 17:07:49 +00001045utmpx_perform_logout(struct logininfo *li)
1046{
andre2ff7b5d2000-06-03 14:57:40 +00001047 struct utmpx utx;
1048
Tim Ricee06ae4a2002-02-24 17:56:46 -08001049 construct_utmpx(li, &utx);
Damien Millerdd47aa22000-06-27 11:18:27 +10001050# ifdef HAVE_ID_IN_UTMPX
andre2ff7b5d2000-06-03 14:57:40 +00001051 line_abbrevname(utx.ut_id, li->line, sizeof(utx.ut_id));
Damien Millerdd47aa22000-06-27 11:18:27 +10001052# endif
1053# ifdef HAVE_TYPE_IN_UTMPX
andre2ff7b5d2000-06-03 14:57:40 +00001054 utx.ut_type = DEAD_PROCESS;
Damien Millerdd47aa22000-06-27 11:18:27 +10001055# endif
andre2ff7b5d2000-06-03 14:57:40 +00001056
Damien Millerdd47aa22000-06-27 11:18:27 +10001057# ifdef UTMPX_USE_LIBRARY
andre2ff7b5d2000-06-03 14:57:40 +00001058 utmpx_write_library(li, &utx);
Damien Millerdd47aa22000-06-27 11:18:27 +10001059# else
andre2ff7b5d2000-06-03 14:57:40 +00001060 utmpx_write_direct(li, &utx);
Damien Millerdd47aa22000-06-27 11:18:27 +10001061# endif
Damien Miller8899ed32004-09-12 15:18:55 +10001062 return (1);
andre61e67252000-06-04 17:07:49 +00001063}
andre2ff7b5d2000-06-03 14:57:40 +00001064
andre2ff7b5d2000-06-03 14:57:40 +00001065int
andre61e67252000-06-04 17:07:49 +00001066utmpx_write_entry(struct logininfo *li)
1067{
andre2ff7b5d2000-06-03 14:57:40 +00001068 switch(li->type) {
1069 case LTYPE_LOGIN:
Damien Miller8899ed32004-09-12 15:18:55 +10001070 return (utmpx_perform_login(li));
andre2ff7b5d2000-06-03 14:57:40 +00001071 case LTYPE_LOGOUT:
Damien Miller8899ed32004-09-12 15:18:55 +10001072 return (utmpx_perform_logout(li));
andre2ff7b5d2000-06-03 14:57:40 +00001073 default:
Damien Miller6b0279c2004-09-12 15:25:17 +10001074 logit("%s: invalid type field", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001075 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001076 }
andre61e67252000-06-04 17:07:49 +00001077}
Damien Millerdd47aa22000-06-27 11:18:27 +10001078#endif /* USE_UTMPX */
andre2ff7b5d2000-06-03 14:57:40 +00001079
1080
1081/**
andre61e67252000-06-04 17:07:49 +00001082 ** Low-level wtmp functions
andre2ff7b5d2000-06-03 14:57:40 +00001083 **/
1084
Kevin Stevesef4eea92001-02-05 12:42:17 +00001085#ifdef USE_WTMP
andre2ff7b5d2000-06-03 14:57:40 +00001086
Damien Miller94cf4c82005-07-17 17:04:47 +10001087/*
Damien Miller8899ed32004-09-12 15:18:55 +10001088 * Write a wtmp entry direct to the end of the file
1089 * This is a slight modification of code in OpenBSD's logwtmp.c
1090 */
andre2ff7b5d2000-06-03 14:57:40 +00001091static int
andre61e67252000-06-04 17:07:49 +00001092wtmp_write(struct logininfo *li, struct utmp *ut)
1093{
andre2ff7b5d2000-06-03 14:57:40 +00001094 struct stat buf;
1095 int fd, ret = 1;
1096
1097 if ((fd = open(WTMP_FILE, O_WRONLY|O_APPEND, 0)) < 0) {
Damien Miller6b0279c2004-09-12 15:25:17 +10001098 logit("%s: problem writing %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001099 WTMP_FILE, strerror(errno));
Damien Miller8899ed32004-09-12 15:18:55 +10001100 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001101 }
Kevin Stevesef4eea92001-02-05 12:42:17 +00001102 if (fstat(fd, &buf) == 0)
Darren Tucker8661b562003-07-06 15:20:46 +10001103 if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) {
andre2ff7b5d2000-06-03 14:57:40 +00001104 ftruncate(fd, buf.st_size);
Damien Miller6b0279c2004-09-12 15:25:17 +10001105 logit("%s: problem writing %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001106 WTMP_FILE, strerror(errno));
1107 ret = 0;
1108 }
Damien Miller8899ed32004-09-12 15:18:55 +10001109 close(fd);
1110 return (ret);
andre61e67252000-06-04 17:07:49 +00001111}
andre2ff7b5d2000-06-03 14:57:40 +00001112
andre2ff7b5d2000-06-03 14:57:40 +00001113static int
Damien Millerdd47aa22000-06-27 11:18:27 +10001114wtmp_perform_login(struct logininfo *li)
1115{
andre2ff7b5d2000-06-03 14:57:40 +00001116 struct utmp ut;
1117
1118 construct_utmp(li, &ut);
Damien Miller8899ed32004-09-12 15:18:55 +10001119 return (wtmp_write(li, &ut));
andre61e67252000-06-04 17:07:49 +00001120}
andre2ff7b5d2000-06-03 14:57:40 +00001121
1122
1123static int
andre61e67252000-06-04 17:07:49 +00001124wtmp_perform_logout(struct logininfo *li)
1125{
andre2ff7b5d2000-06-03 14:57:40 +00001126 struct utmp ut;
1127
1128 construct_utmp(li, &ut);
Damien Miller8899ed32004-09-12 15:18:55 +10001129 return (wtmp_write(li, &ut));
andre61e67252000-06-04 17:07:49 +00001130}
andre2ff7b5d2000-06-03 14:57:40 +00001131
1132
1133int
andre61e67252000-06-04 17:07:49 +00001134wtmp_write_entry(struct logininfo *li)
1135{
andre2ff7b5d2000-06-03 14:57:40 +00001136 switch(li->type) {
1137 case LTYPE_LOGIN:
Damien Miller8899ed32004-09-12 15:18:55 +10001138 return (wtmp_perform_login(li));
andre2ff7b5d2000-06-03 14:57:40 +00001139 case LTYPE_LOGOUT:
Damien Miller8899ed32004-09-12 15:18:55 +10001140 return (wtmp_perform_logout(li));
andre2ff7b5d2000-06-03 14:57:40 +00001141 default:
Damien Miller6b0279c2004-09-12 15:25:17 +10001142 logit("%s: invalid type field", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001143 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001144 }
andre61e67252000-06-04 17:07:49 +00001145}
andre2ff7b5d2000-06-03 14:57:40 +00001146
1147
Damien Miller94cf4c82005-07-17 17:04:47 +10001148/*
Damien Miller8899ed32004-09-12 15:18:55 +10001149 * Notes on fetching login data from wtmp/wtmpx
Kevin Stevesef4eea92001-02-05 12:42:17 +00001150 *
andre6bb92372000-06-19 08:20:03 +00001151 * Logouts are usually recorded with (amongst other things) a blank
1152 * username on a given tty line. However, some systems (HP-UX is one)
1153 * leave all fields set, but change the ut_type field to DEAD_PROCESS.
1154 *
1155 * Since we're only looking for logins here, we know that the username
1156 * must be set correctly. On systems that leave it in, we check for
1157 * ut_type==USER_PROCESS (indicating a login.)
1158 *
1159 * Portability: Some systems may set something other than USER_PROCESS
1160 * to indicate a login process. I don't know of any as I write. Also,
1161 * it's possible that some systems may both leave the username in
1162 * place and not have ut_type.
1163 */
1164
andre6bb92372000-06-19 08:20:03 +00001165/* return true if this wtmp entry indicates a login */
1166static int
1167wtmp_islogin(struct logininfo *li, struct utmp *ut)
1168{
Kevin Stevesef4eea92001-02-05 12:42:17 +00001169 if (strncmp(li->username, ut->ut_name,
Damien Miller8899ed32004-09-12 15:18:55 +10001170 MIN_SIZEOF(li->username, ut->ut_name)) == 0) {
Damien Millerdd47aa22000-06-27 11:18:27 +10001171# ifdef HAVE_TYPE_IN_UTMP
andre6bb92372000-06-19 08:20:03 +00001172 if (ut->ut_type & USER_PROCESS)
Damien Miller8899ed32004-09-12 15:18:55 +10001173 return (1);
Damien Millerdd47aa22000-06-27 11:18:27 +10001174# else
Damien Miller8899ed32004-09-12 15:18:55 +10001175 return (1);
Damien Millerdd47aa22000-06-27 11:18:27 +10001176# endif
andre6bb92372000-06-19 08:20:03 +00001177 }
Damien Miller8899ed32004-09-12 15:18:55 +10001178 return (0);
andre6bb92372000-06-19 08:20:03 +00001179}
1180
andre2ff7b5d2000-06-03 14:57:40 +00001181int
andre61e67252000-06-04 17:07:49 +00001182wtmp_get_entry(struct logininfo *li)
1183{
andre2ff7b5d2000-06-03 14:57:40 +00001184 struct stat st;
1185 struct utmp ut;
Damien Miller8899ed32004-09-12 15:18:55 +10001186 int fd, found = 0;
andre6bb92372000-06-19 08:20:03 +00001187
1188 /* Clear the time entries in our logininfo */
1189 li->tv_sec = li->tv_usec = 0;
andre2ff7b5d2000-06-03 14:57:40 +00001190
1191 if ((fd = open(WTMP_FILE, O_RDONLY)) < 0) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001192 logit("%s: problem opening %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001193 WTMP_FILE, strerror(errno));
Damien Miller8899ed32004-09-12 15:18:55 +10001194 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001195 }
Kevin Stevesef4eea92001-02-05 12:42:17 +00001196 if (fstat(fd, &st) != 0) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001197 logit("%s: couldn't stat %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001198 WTMP_FILE, strerror(errno));
1199 close(fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001200 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001201 }
andre2ff7b5d2000-06-03 14:57:40 +00001202
andre6bb92372000-06-19 08:20:03 +00001203 /* Seek to the start of the last struct utmp */
Kevin Steves52172652001-10-02 00:29:00 +00001204 if (lseek(fd, -(off_t)sizeof(struct utmp), SEEK_END) == -1) {
andre6bb92372000-06-19 08:20:03 +00001205 /* Looks like we've got a fresh wtmp file */
1206 close(fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001207 return (0);
andre6bb92372000-06-19 08:20:03 +00001208 }
1209
1210 while (!found) {
Damien Miller53c5d462000-06-28 00:50:50 +10001211 if (atomicio(read, fd, &ut, sizeof(ut)) != sizeof(ut)) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001212 logit("%s: read of %s failed: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001213 WTMP_FILE, strerror(errno));
1214 close (fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001215 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001216 }
Damien Miller4a06f922011-01-02 21:43:59 +11001217 if (wtmp_islogin(li, &ut) ) {
andre6bb92372000-06-19 08:20:03 +00001218 found = 1;
Damien Miller8899ed32004-09-12 15:18:55 +10001219 /*
1220 * We've already checked for a time in struct
1221 * utmp, in login_getlast()
1222 */
Damien Millerdd47aa22000-06-27 11:18:27 +10001223# ifdef HAVE_TIME_IN_UTMP
andre2ff7b5d2000-06-03 14:57:40 +00001224 li->tv_sec = ut.ut_time;
Damien Millerdd47aa22000-06-27 11:18:27 +10001225# else
andre2ff7b5d2000-06-03 14:57:40 +00001226# if HAVE_TV_IN_UTMP
1227 li->tv_sec = ut.ut_tv.tv_sec;
1228# endif
Damien Millerdd47aa22000-06-27 11:18:27 +10001229# endif
andre6bb92372000-06-19 08:20:03 +00001230 line_fullname(li->line, ut.ut_line,
Damien Miller8899ed32004-09-12 15:18:55 +10001231 MIN_SIZEOF(li->line, ut.ut_line));
Damien Millerdd47aa22000-06-27 11:18:27 +10001232# ifdef HAVE_HOST_IN_UTMP
andre6bb92372000-06-19 08:20:03 +00001233 strlcpy(li->hostname, ut.ut_host,
Damien Miller8899ed32004-09-12 15:18:55 +10001234 MIN_SIZEOF(li->hostname, ut.ut_host));
Damien Millerdd47aa22000-06-27 11:18:27 +10001235# endif
andre6bb92372000-06-19 08:20:03 +00001236 continue;
andre2ff7b5d2000-06-03 14:57:40 +00001237 }
andre6bb92372000-06-19 08:20:03 +00001238 /* Seek back 2 x struct utmp */
Kevin Steves52172652001-10-02 00:29:00 +00001239 if (lseek(fd, -(off_t)(2 * sizeof(struct utmp)), SEEK_CUR) == -1) {
andre6bb92372000-06-19 08:20:03 +00001240 /* We've found the start of the file, so quit */
Damien Miller8899ed32004-09-12 15:18:55 +10001241 close(fd);
1242 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001243 }
andre6bb92372000-06-19 08:20:03 +00001244 }
1245
1246 /* We found an entry. Tidy up and return */
1247 close(fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001248 return (1);
andre61e67252000-06-04 17:07:49 +00001249}
Damien Millerdd47aa22000-06-27 11:18:27 +10001250# endif /* USE_WTMP */
andre2ff7b5d2000-06-03 14:57:40 +00001251
1252
1253/**
andre61e67252000-06-04 17:07:49 +00001254 ** Low-level wtmpx functions
andre2ff7b5d2000-06-03 14:57:40 +00001255 **/
1256
1257#ifdef USE_WTMPX
Damien Miller8899ed32004-09-12 15:18:55 +10001258/*
1259 * Write a wtmpx entry direct to the end of the file
1260 * This is a slight modification of code in OpenBSD's logwtmp.c
1261 */
andre2ff7b5d2000-06-03 14:57:40 +00001262static int
andre61e67252000-06-04 17:07:49 +00001263wtmpx_write(struct logininfo *li, struct utmpx *utx)
1264{
Darren Tuckerc28b88a2004-02-10 16:49:35 +11001265#ifndef HAVE_UPDWTMPX
andre2ff7b5d2000-06-03 14:57:40 +00001266 struct stat buf;
1267 int fd, ret = 1;
1268
1269 if ((fd = open(WTMPX_FILE, O_WRONLY|O_APPEND, 0)) < 0) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001270 logit("%s: problem opening %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001271 WTMPX_FILE, strerror(errno));
Damien Miller8899ed32004-09-12 15:18:55 +10001272 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001273 }
1274
Kevin Stevesef4eea92001-02-05 12:42:17 +00001275 if (fstat(fd, &buf) == 0)
Darren Tucker8661b562003-07-06 15:20:46 +10001276 if (atomicio(vwrite, fd, utx, sizeof(*utx)) != sizeof(*utx)) {
andre2ff7b5d2000-06-03 14:57:40 +00001277 ftruncate(fd, buf.st_size);
Damien Miller6b0279c2004-09-12 15:25:17 +10001278 logit("%s: problem writing %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001279 WTMPX_FILE, strerror(errno));
1280 ret = 0;
1281 }
Damien Miller8899ed32004-09-12 15:18:55 +10001282 close(fd);
andre2ff7b5d2000-06-03 14:57:40 +00001283
Damien Miller8899ed32004-09-12 15:18:55 +10001284 return (ret);
Darren Tuckerc28b88a2004-02-10 16:49:35 +11001285#else
1286 updwtmpx(WTMPX_FILE, utx);
Damien Miller8899ed32004-09-12 15:18:55 +10001287 return (1);
Darren Tuckerc28b88a2004-02-10 16:49:35 +11001288#endif
andre61e67252000-06-04 17:07:49 +00001289}
andre2ff7b5d2000-06-03 14:57:40 +00001290
1291
1292static int
andre61e67252000-06-04 17:07:49 +00001293wtmpx_perform_login(struct logininfo *li)
1294{
andre2ff7b5d2000-06-03 14:57:40 +00001295 struct utmpx utx;
1296
1297 construct_utmpx(li, &utx);
Damien Miller8899ed32004-09-12 15:18:55 +10001298 return (wtmpx_write(li, &utx));
andre61e67252000-06-04 17:07:49 +00001299}
andre2ff7b5d2000-06-03 14:57:40 +00001300
1301
1302static int
andre61e67252000-06-04 17:07:49 +00001303wtmpx_perform_logout(struct logininfo *li)
1304{
andre2ff7b5d2000-06-03 14:57:40 +00001305 struct utmpx utx;
1306
1307 construct_utmpx(li, &utx);
Damien Miller8899ed32004-09-12 15:18:55 +10001308 return (wtmpx_write(li, &utx));
andre61e67252000-06-04 17:07:49 +00001309}
andre2ff7b5d2000-06-03 14:57:40 +00001310
1311
1312int
andre61e67252000-06-04 17:07:49 +00001313wtmpx_write_entry(struct logininfo *li)
1314{
andre2ff7b5d2000-06-03 14:57:40 +00001315 switch(li->type) {
1316 case LTYPE_LOGIN:
Damien Miller8899ed32004-09-12 15:18:55 +10001317 return (wtmpx_perform_login(li));
andre2ff7b5d2000-06-03 14:57:40 +00001318 case LTYPE_LOGOUT:
Damien Miller8899ed32004-09-12 15:18:55 +10001319 return (wtmpx_perform_logout(li));
andre2ff7b5d2000-06-03 14:57:40 +00001320 default:
Damien Miller6b0279c2004-09-12 15:25:17 +10001321 logit("%s: invalid type field", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001322 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001323 }
andre61e67252000-06-04 17:07:49 +00001324}
andre2ff7b5d2000-06-03 14:57:40 +00001325
andre6bb92372000-06-19 08:20:03 +00001326/* Please see the notes above wtmp_islogin() for information about the
1327 next two functions */
1328
1329/* Return true if this wtmpx entry indicates a login */
1330static int
1331wtmpx_islogin(struct logininfo *li, struct utmpx *utx)
1332{
Darren Tucker0b8a2262010-01-09 18:18:04 +11001333 if (strncmp(li->username, utx->ut_user,
1334 MIN_SIZEOF(li->username, utx->ut_user)) == 0 ) {
Damien Millerdd47aa22000-06-27 11:18:27 +10001335# ifdef HAVE_TYPE_IN_UTMPX
andre6bb92372000-06-19 08:20:03 +00001336 if (utx->ut_type == USER_PROCESS)
Damien Miller8899ed32004-09-12 15:18:55 +10001337 return (1);
Damien Millerdd47aa22000-06-27 11:18:27 +10001338# else
Damien Miller8899ed32004-09-12 15:18:55 +10001339 return (1);
Damien Millerdd47aa22000-06-27 11:18:27 +10001340# endif
andre6bb92372000-06-19 08:20:03 +00001341 }
Damien Miller8899ed32004-09-12 15:18:55 +10001342 return (0);
andre6bb92372000-06-19 08:20:03 +00001343}
1344
andre2ff7b5d2000-06-03 14:57:40 +00001345
1346int
andre61e67252000-06-04 17:07:49 +00001347wtmpx_get_entry(struct logininfo *li)
1348{
andre2ff7b5d2000-06-03 14:57:40 +00001349 struct stat st;
1350 struct utmpx utx;
andre6bb92372000-06-19 08:20:03 +00001351 int fd, found=0;
1352
1353 /* Clear the time entries */
1354 li->tv_sec = li->tv_usec = 0;
andre2ff7b5d2000-06-03 14:57:40 +00001355
1356 if ((fd = open(WTMPX_FILE, O_RDONLY)) < 0) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001357 logit("%s: problem opening %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001358 WTMPX_FILE, strerror(errno));
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 if (fstat(fd, &st) != 0) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001362 logit("%s: couldn't stat %s: %s", __func__,
Tim Ricecdb82942002-07-14 15:33:20 -07001363 WTMPX_FILE, strerror(errno));
andre2ff7b5d2000-06-03 14:57:40 +00001364 close(fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001365 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001366 }
Kevin Stevesef4eea92001-02-05 12:42:17 +00001367
andre6bb92372000-06-19 08:20:03 +00001368 /* Seek to the start of the last struct utmpx */
Kevin Steves52172652001-10-02 00:29:00 +00001369 if (lseek(fd, -(off_t)sizeof(struct utmpx), SEEK_END) == -1 ) {
andre6bb92372000-06-19 08:20:03 +00001370 /* probably a newly rotated wtmpx file */
1371 close(fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001372 return (0);
andre6bb92372000-06-19 08:20:03 +00001373 }
andre2ff7b5d2000-06-03 14:57:40 +00001374
andre6bb92372000-06-19 08:20:03 +00001375 while (!found) {
Damien Miller53c5d462000-06-28 00:50:50 +10001376 if (atomicio(read, fd, &utx, sizeof(utx)) != sizeof(utx)) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001377 logit("%s: read of %s failed: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001378 WTMPX_FILE, strerror(errno));
1379 close (fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001380 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001381 }
Damien Miller8899ed32004-09-12 15:18:55 +10001382 /*
Damien Miller94cf4c82005-07-17 17:04:47 +10001383 * Logouts are recorded as a blank username on a particular
Damien Miller8899ed32004-09-12 15:18:55 +10001384 * line. So, we just need to find the username in struct utmpx
1385 */
1386 if (wtmpx_islogin(li, &utx)) {
Tim Rice370e0ba2002-07-14 15:50:51 -07001387 found = 1;
Damien Miller8899ed32004-09-12 15:18:55 +10001388# if defined(HAVE_TV_IN_UTMPX)
andre2ff7b5d2000-06-03 14:57:40 +00001389 li->tv_sec = utx.ut_tv.tv_sec;
Damien Miller8899ed32004-09-12 15:18:55 +10001390# elif defined(HAVE_TIME_IN_UTMPX)
andre2ff7b5d2000-06-03 14:57:40 +00001391 li->tv_sec = utx.ut_time;
Damien Millerdd47aa22000-06-27 11:18:27 +10001392# endif
Damien Miller1a132252000-06-13 21:23:17 +10001393 line_fullname(li->line, utx.ut_line, sizeof(li->line));
Damien Miller8899ed32004-09-12 15:18:55 +10001394# if defined(HAVE_HOST_IN_UTMPX)
andre6bb92372000-06-19 08:20:03 +00001395 strlcpy(li->hostname, utx.ut_host,
Damien Miller8899ed32004-09-12 15:18:55 +10001396 MIN_SIZEOF(li->hostname, utx.ut_host));
Damien Millerdd47aa22000-06-27 11:18:27 +10001397# endif
andre6bb92372000-06-19 08:20:03 +00001398 continue;
andre2ff7b5d2000-06-03 14:57:40 +00001399 }
Kevin Steves52172652001-10-02 00:29:00 +00001400 if (lseek(fd, -(off_t)(2 * sizeof(struct utmpx)), SEEK_CUR) == -1) {
Damien Miller8899ed32004-09-12 15:18:55 +10001401 close(fd);
1402 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001403 }
andre6bb92372000-06-19 08:20:03 +00001404 }
1405
1406 close(fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001407 return (1);
andre61e67252000-06-04 17:07:49 +00001408}
Damien Millerd5bf3072000-06-07 21:32:13 +10001409#endif /* USE_WTMPX */
andre2ff7b5d2000-06-03 14:57:40 +00001410
andre2ff7b5d2000-06-03 14:57:40 +00001411/**
andre61e67252000-06-04 17:07:49 +00001412 ** Low-level libutil login() functions
andre2ff7b5d2000-06-03 14:57:40 +00001413 **/
1414
1415#ifdef USE_LOGIN
andre2ff7b5d2000-06-03 14:57:40 +00001416static int
andre61e67252000-06-04 17:07:49 +00001417syslogin_perform_login(struct logininfo *li)
1418{
andre2ff7b5d2000-06-03 14:57:40 +00001419 struct utmp *ut;
1420
Damien Millerb0aae332004-09-12 15:26:00 +10001421 ut = xmalloc(sizeof(*ut));
andre2ff7b5d2000-06-03 14:57:40 +00001422 construct_utmp(li, ut);
1423 login(ut);
Damien Millerf211efc2003-03-10 11:23:06 +11001424 free(ut);
andre2ff7b5d2000-06-03 14:57:40 +00001425
Damien Miller8899ed32004-09-12 15:18:55 +10001426 return (1);
andre61e67252000-06-04 17:07:49 +00001427}
1428
andre2ff7b5d2000-06-03 14:57:40 +00001429static int
andre61e67252000-06-04 17:07:49 +00001430syslogin_perform_logout(struct logininfo *li)
1431{
Damien Millerdd47aa22000-06-27 11:18:27 +10001432# ifdef HAVE_LOGOUT
Darren Tucker4d2f3612004-04-08 10:57:05 +10001433 char line[UT_LINESIZE];
Kevin Stevesef4eea92001-02-05 12:42:17 +00001434
andre2ff7b5d2000-06-03 14:57:40 +00001435 (void)line_stripname(line, li->line, sizeof(line));
1436
Damien Miller8899ed32004-09-12 15:18:55 +10001437 if (!logout(line))
Damien Miller6b0279c2004-09-12 15:25:17 +10001438 logit("%s: logout() returned an error", __func__);
Damien Millerdd47aa22000-06-27 11:18:27 +10001439# ifdef HAVE_LOGWTMP
Damien Miller8899ed32004-09-12 15:18:55 +10001440 else
andre2ff7b5d2000-06-03 14:57:40 +00001441 logwtmp(line, "", "");
Damien Millerdd47aa22000-06-27 11:18:27 +10001442# endif
andre6bb92372000-06-19 08:20:03 +00001443 /* FIXME: (ATL - if the need arises) What to do if we have
1444 * login, but no logout? what if logout but no logwtmp? All
1445 * routines are in libutil so they should all be there,
1446 * but... */
Damien Millerdd47aa22000-06-27 11:18:27 +10001447# endif
Damien Miller8899ed32004-09-12 15:18:55 +10001448 return (1);
andre61e67252000-06-04 17:07:49 +00001449}
andre2ff7b5d2000-06-03 14:57:40 +00001450
andre2ff7b5d2000-06-03 14:57:40 +00001451int
andre61e67252000-06-04 17:07:49 +00001452syslogin_write_entry(struct logininfo *li)
1453{
andre2ff7b5d2000-06-03 14:57:40 +00001454 switch (li->type) {
1455 case LTYPE_LOGIN:
Damien Miller8899ed32004-09-12 15:18:55 +10001456 return (syslogin_perform_login(li));
andre2ff7b5d2000-06-03 14:57:40 +00001457 case LTYPE_LOGOUT:
Damien Miller8899ed32004-09-12 15:18:55 +10001458 return (syslogin_perform_logout(li));
andre2ff7b5d2000-06-03 14:57:40 +00001459 default:
Damien Miller6b0279c2004-09-12 15:25:17 +10001460 logit("%s: Invalid type field", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001461 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001462 }
andre61e67252000-06-04 17:07:49 +00001463}
Damien Millerd5bf3072000-06-07 21:32:13 +10001464#endif /* USE_LOGIN */
andre2ff7b5d2000-06-03 14:57:40 +00001465
1466/* end of file log-syslogin.c */
1467
andre2ff7b5d2000-06-03 14:57:40 +00001468/**
andre61e67252000-06-04 17:07:49 +00001469 ** Low-level lastlog functions
andre2ff7b5d2000-06-03 14:57:40 +00001470 **/
1471
1472#ifdef USE_LASTLOG
1473
Damien Miller20e231f2009-02-12 13:12:21 +11001474#if !defined(LASTLOG_WRITE_PUTUTXLINE) || !defined(HAVE_GETLASTLOGXBYNAME)
1475/* open the file (using filemode) and seek to the login entry */
andre2ff7b5d2000-06-03 14:57:40 +00001476static int
Damien Miller20e231f2009-02-12 13:12:21 +11001477lastlog_openseek(struct logininfo *li, int *fd, int filemode)
andre61e67252000-06-04 17:07:49 +00001478{
Damien Miller20e231f2009-02-12 13:12:21 +11001479 off_t offset;
1480 char lastlog_file[1024];
andre2ff7b5d2000-06-03 14:57:40 +00001481 struct stat st;
1482
Damien Millerdd47aa22000-06-27 11:18:27 +10001483 if (stat(LASTLOG_FILE, &st) != 0) {
Damien Miller6b0279c2004-09-12 15:25:17 +10001484 logit("%s: Couldn't stat %s: %s", __func__,
Damien Miller8899ed32004-09-12 15:18:55 +10001485 LASTLOG_FILE, strerror(errno));
1486 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001487 }
Damien Miller20e231f2009-02-12 13:12:21 +11001488 if (S_ISDIR(st.st_mode)) {
Damien Miller8899ed32004-09-12 15:18:55 +10001489 snprintf(lastlog_file, sizeof(lastlog_file), "%s/%s",
1490 LASTLOG_FILE, li->username);
Damien Miller20e231f2009-02-12 13:12:21 +11001491 } else if (S_ISREG(st.st_mode)) {
1492 strlcpy(lastlog_file, LASTLOG_FILE, sizeof(lastlog_file));
1493 } else {
Damien Miller6b0279c2004-09-12 15:25:17 +10001494 logit("%s: %.100s is not a file or directory!", __func__,
Damien Miller8899ed32004-09-12 15:18:55 +10001495 LASTLOG_FILE);
1496 return (0);
Damien Millerdd47aa22000-06-27 11:18:27 +10001497 }
andre2ff7b5d2000-06-03 14:57:40 +00001498
Damien Miller405dc602003-04-09 21:12:52 +10001499 *fd = open(lastlog_file, filemode, 0600);
Damien Miller8899ed32004-09-12 15:18:55 +10001500 if (*fd < 0) {
Damien Miller6b0279c2004-09-12 15:25:17 +10001501 debug("%s: Couldn't open %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001502 lastlog_file, strerror(errno));
Damien Miller8899ed32004-09-12 15:18:55 +10001503 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001504 }
Kevin Stevesef4eea92001-02-05 12:42:17 +00001505
Damien Miller20e231f2009-02-12 13:12:21 +11001506 if (S_ISREG(st.st_mode)) {
Damien Millere477ef62000-08-15 10:21:17 +10001507 /* find this uid's offset in the lastlog file */
Damien Miller34ee4202010-11-05 10:52:37 +11001508 offset = (off_t) ((u_long)li->uid * sizeof(struct lastlog));
andre2ff7b5d2000-06-03 14:57:40 +00001509
Damien Miller8899ed32004-09-12 15:18:55 +10001510 if (lseek(*fd, offset, SEEK_SET) != offset) {
Damien Miller6b0279c2004-09-12 15:25:17 +10001511 logit("%s: %s->lseek(): %s", __func__,
1512 lastlog_file, strerror(errno));
Damien Miller4a06f922011-01-02 21:43:59 +11001513 close(*fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001514 return (0);
Damien Millere477ef62000-08-15 10:21:17 +10001515 }
andre2ff7b5d2000-06-03 14:57:40 +00001516 }
Kevin Stevesef4eea92001-02-05 12:42:17 +00001517
Damien Miller8899ed32004-09-12 15:18:55 +10001518 return (1);
andre61e67252000-06-04 17:07:49 +00001519}
Damien Miller20e231f2009-02-12 13:12:21 +11001520#endif /* !LASTLOG_WRITE_PUTUTXLINE || !HAVE_GETLASTLOGXBYNAME */
andre2ff7b5d2000-06-03 14:57:40 +00001521
Damien Miller20e231f2009-02-12 13:12:21 +11001522#ifdef LASTLOG_WRITE_PUTUTXLINE
andre2ff7b5d2000-06-03 14:57:40 +00001523int
andre61e67252000-06-04 17:07:49 +00001524lastlog_write_entry(struct logininfo *li)
1525{
andre2ff7b5d2000-06-03 14:57:40 +00001526 switch(li->type) {
1527 case LTYPE_LOGIN:
Damien Miller20e231f2009-02-12 13:12:21 +11001528 return 1; /* lastlog written by pututxline */
1529 default:
1530 logit("lastlog_write_entry: Invalid type field");
1531 return 0;
1532 }
1533}
1534#else /* LASTLOG_WRITE_PUTUTXLINE */
1535int
1536lastlog_write_entry(struct logininfo *li)
1537{
1538 struct lastlog last;
1539 int fd;
1540
1541 switch(li->type) {
1542 case LTYPE_LOGIN:
1543 /* create our struct lastlog */
1544 memset(&last, '\0', sizeof(last));
1545 line_stripname(last.ll_line, li->line, sizeof(last.ll_line));
1546 strlcpy(last.ll_host, li->hostname,
1547 MIN_SIZEOF(last.ll_host, li->hostname));
1548 last.ll_time = li->tv_sec;
1549
1550 if (!lastlog_openseek(li, &fd, O_RDWR|O_CREAT))
1551 return (0);
1552
1553 /* write the entry */
1554 if (atomicio(vwrite, fd, &last, sizeof(last)) != sizeof(last)) {
1555 close(fd);
1556 logit("%s: Error writing to %s: %s", __func__,
1557 LASTLOG_FILE, strerror(errno));
1558 return (0);
1559 }
1560
1561 close(fd);
1562 return (1);
andre2ff7b5d2000-06-03 14:57:40 +00001563 default:
Damien Miller6b0279c2004-09-12 15:25:17 +10001564 logit("%s: Invalid type field", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001565 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001566 }
andre61e67252000-06-04 17:07:49 +00001567}
Damien Miller20e231f2009-02-12 13:12:21 +11001568#endif /* LASTLOG_WRITE_PUTUTXLINE */
andre2ff7b5d2000-06-03 14:57:40 +00001569
Damien Miller20e231f2009-02-12 13:12:21 +11001570#ifdef HAVE_GETLASTLOGXBYNAME
1571int
1572lastlog_get_entry(struct logininfo *li)
andre61e67252000-06-04 17:07:49 +00001573{
Damien Miller20e231f2009-02-12 13:12:21 +11001574 struct lastlogx l, *ll;
andre2ff7b5d2000-06-03 14:57:40 +00001575
Damien Miller20e231f2009-02-12 13:12:21 +11001576 if ((ll = getlastlogxbyname(li->username, &l)) == NULL) {
1577 memset(&l, '\0', sizeof(l));
1578 ll = &l;
1579 }
1580 line_fullname(li->line, ll->ll_line, sizeof(li->line));
1581 strlcpy(li->hostname, ll->ll_host,
1582 MIN_SIZEOF(li->hostname, ll->ll_host));
1583 li->tv_sec = ll->ll_tv.tv_sec;
1584 li->tv_usec = ll->ll_tv.tv_usec;
1585 return (1);
1586}
1587#else /* HAVE_GETLASTLOGXBYNAME */
andre2ff7b5d2000-06-03 14:57:40 +00001588int
andre61e67252000-06-04 17:07:49 +00001589lastlog_get_entry(struct logininfo *li)
1590{
andre2ff7b5d2000-06-03 14:57:40 +00001591 struct lastlog last;
Damien Miller7df881d2003-01-07 16:46:58 +11001592 int fd, ret;
andre2ff7b5d2000-06-03 14:57:40 +00001593
Damien Miller3a8a5cd2001-10-22 16:49:22 +10001594 if (!lastlog_openseek(li, &fd, O_RDONLY))
Damien Miller7df881d2003-01-07 16:46:58 +11001595 return (0);
Damien Miller3a8a5cd2001-10-22 16:49:22 +10001596
Damien Miller7df881d2003-01-07 16:46:58 +11001597 ret = atomicio(read, fd, &last, sizeof(last));
Damien Miller3a8a5cd2001-10-22 16:49:22 +10001598 close(fd);
1599
Damien Miller7df881d2003-01-07 16:46:58 +11001600 switch (ret) {
1601 case 0:
1602 memset(&last, '\0', sizeof(last));
1603 /* FALLTHRU */
1604 case sizeof(last):
Damien Miller20e231f2009-02-12 13:12:21 +11001605 line_fullname(li->line, last.ll_line, sizeof(li->line));
1606 strlcpy(li->hostname, last.ll_host,
1607 MIN_SIZEOF(li->hostname, last.ll_host));
1608 li->tv_sec = last.ll_time;
Damien Miller7df881d2003-01-07 16:46:58 +11001609 return (1);
1610 case -1:
Damien Millera8e06ce2003-11-21 23:48:55 +11001611 error("%s: Error reading from %s: %s", __func__,
Damien Miller7df881d2003-01-07 16:46:58 +11001612 LASTLOG_FILE, strerror(errno));
1613 return (0);
1614 default:
1615 error("%s: Error reading from %s: Expecting %d, got %d",
Darren Tuckerefc17472005-11-22 19:55:13 +11001616 __func__, LASTLOG_FILE, (int)sizeof(last), ret);
Damien Miller7df881d2003-01-07 16:46:58 +11001617 return (0);
1618 }
Damien Miller3a8a5cd2001-10-22 16:49:22 +10001619
Damien Miller7df881d2003-01-07 16:46:58 +11001620 /* NOTREACHED */
1621 return (0);
andre61e67252000-06-04 17:07:49 +00001622}
Damien Miller20e231f2009-02-12 13:12:21 +11001623#endif /* HAVE_GETLASTLOGXBYNAME */
Damien Millerd5bf3072000-06-07 21:32:13 +10001624#endif /* USE_LASTLOG */
Darren Tucker2fba9932005-02-02 23:30:24 +11001625
Darren Tucker261d93a2010-04-09 18:13:27 +10001626#if defined(USE_UTMPX) && defined(HAVE_SETUTXDB) && \
1627 defined(UTXDB_LASTLOGIN) && defined(HAVE_GETUTXUSER)
1628int
1629utmpx_get_entry(struct logininfo *li)
1630{
1631 struct utmpx *utx;
1632
1633 if (setutxdb(UTXDB_LASTLOGIN, NULL) != 0)
1634 return (0);
1635 utx = getutxuser(li->username);
1636 if (utx == NULL) {
1637 endutxent();
1638 return (0);
1639 }
1640
1641 line_fullname(li->line, utx->ut_line,
1642 MIN_SIZEOF(li->line, utx->ut_line));
1643 strlcpy(li->hostname, utx->ut_host,
1644 MIN_SIZEOF(li->hostname, utx->ut_host));
1645 li->tv_sec = utx->ut_tv.tv_sec;
1646 li->tv_usec = utx->ut_tv.tv_usec;
1647 endutxent();
1648 return (1);
1649}
1650#endif /* USE_UTMPX && HAVE_SETUTXDB && UTXDB_LASTLOGIN && HAVE_GETUTXUSER */
1651
Darren Tucker2fba9932005-02-02 23:30:24 +11001652#ifdef USE_BTMP
1653 /*
1654 * Logs failed login attempts in _PATH_BTMP if that exists.
1655 * The most common login failure is to give password instead of username.
1656 * So the _PATH_BTMP file checked for the correct permission, so that
1657 * only root can read it.
1658 */
1659
1660void
1661record_failed_login(const char *username, const char *hostname,
1662 const char *ttyn)
1663{
1664 int fd;
1665 struct utmp ut;
1666 struct sockaddr_storage from;
Darren Tuckerefc17472005-11-22 19:55:13 +11001667 socklen_t fromlen = sizeof(from);
Darren Tucker2fba9932005-02-02 23:30:24 +11001668 struct sockaddr_in *a4;
1669 struct sockaddr_in6 *a6;
1670 time_t t;
1671 struct stat fst;
1672
1673 if (geteuid() != 0)
1674 return;
1675 if ((fd = open(_PATH_BTMP, O_WRONLY | O_APPEND)) < 0) {
1676 debug("Unable to open the btmp file %s: %s", _PATH_BTMP,
1677 strerror(errno));
1678 return;
1679 }
1680 if (fstat(fd, &fst) < 0) {
1681 logit("%s: fstat of %s failed: %s", __func__, _PATH_BTMP,
1682 strerror(errno));
1683 goto out;
1684 }
Damien Miller88e341e2010-11-24 10:36:15 +11001685 if((fst.st_mode & (S_IXGRP | S_IRWXO)) || (fst.st_uid != 0)){
Darren Tucker2fba9932005-02-02 23:30:24 +11001686 logit("Excess permission or bad ownership on file %s",
1687 _PATH_BTMP);
1688 goto out;
1689 }
1690
1691 memset(&ut, 0, sizeof(ut));
1692 /* strncpy because we don't necessarily want nul termination */
1693 strncpy(ut.ut_user, username, sizeof(ut.ut_user));
1694 strlcpy(ut.ut_line, "ssh:notty", sizeof(ut.ut_line));
1695
1696 time(&t);
1697 ut.ut_time = t; /* ut_time is not always a time_t */
1698 ut.ut_type = LOGIN_PROCESS;
1699 ut.ut_pid = getpid();
1700
1701 /* strncpy because we don't necessarily want nul termination */
1702 strncpy(ut.ut_host, hostname, sizeof(ut.ut_host));
1703
1704 if (packet_connection_is_on_socket() &&
1705 getpeername(packet_get_connection_in(),
1706 (struct sockaddr *)&from, &fromlen) == 0) {
1707 ipv64_normalise_mapped(&from, &fromlen);
1708 if (from.ss_family == AF_INET) {
1709 a4 = (struct sockaddr_in *)&from;
1710 memcpy(&ut.ut_addr, &(a4->sin_addr),
1711 MIN_SIZEOF(ut.ut_addr, a4->sin_addr));
1712 }
1713#ifdef HAVE_ADDR_V6_IN_UTMP
1714 if (from.ss_family == AF_INET6) {
1715 a6 = (struct sockaddr_in6 *)&from;
1716 memcpy(&ut.ut_addr_v6, &(a6->sin6_addr),
1717 MIN_SIZEOF(ut.ut_addr_v6, a6->sin6_addr));
1718 }
1719#endif
1720 }
1721
1722 if (atomicio(vwrite, fd, &ut, sizeof(ut)) != sizeof(ut))
1723 error("Failed to write to %s: %s", _PATH_BTMP,
1724 strerror(errno));
1725
1726out:
1727 close(fd);
1728}
1729#endif /* USE_BTMP */