blob: e591277478203b0194613fdbdd4a6a5050d70e26 [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>
164#include <unistd.h>
Damien Miller9f2abc42006-07-10 20:53:08 +1000165
andre2ff7b5d2000-06-03 14:57:40 +0000166#include "xmalloc.h"
Damien Millerd7834352006-08-05 12:39:39 +1000167#include "key.h"
168#include "hostfile.h"
169#include "ssh.h"
andre2ff7b5d2000-06-03 14:57:40 +0000170#include "loginrec.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +0000171#include "log.h"
172#include "atomicio.h"
Darren Tucker2fba9932005-02-02 23:30:24 +1100173#include "packet.h"
174#include "canohost.h"
Darren Tucker269a1ea2005-02-03 00:20:53 +1100175#include "auth.h"
Darren Tuckera39f83e2005-02-15 22:19:28 +1100176#include "buffer.h"
andre2ff7b5d2000-06-03 14:57:40 +0000177
Ben Lindstromdcca9812000-11-10 03:28:31 +0000178#ifdef HAVE_UTIL_H
Damien Miller8899ed32004-09-12 15:18:55 +1000179# include <util.h>
Ben Lindstromdcca9812000-11-10 03:28:31 +0000180#endif
andre2ff7b5d2000-06-03 14:57:40 +0000181
Ben Lindstrome2fb8d32000-12-28 00:07:07 +0000182#ifdef HAVE_LIBUTIL_H
Damien Miller8899ed32004-09-12 15:18:55 +1000183# include <libutil.h>
Ben Lindstrome2fb8d32000-12-28 00:07:07 +0000184#endif
185
andre2ff7b5d2000-06-03 14:57:40 +0000186/**
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);
209int wtmp_get_entry(struct logininfo *li);
210int wtmpx_get_entry(struct logininfo *li);
211
Darren Tucker691d5232005-02-15 21:45:57 +1100212extern Buffer loginmsg;
213
andre6bb92372000-06-19 08:20:03 +0000214/* pick the shortest string */
Damien Miller8899ed32004-09-12 15:18:55 +1000215#define MIN_SIZEOF(s1,s2) (sizeof(s1) < sizeof(s2) ? sizeof(s1) : sizeof(s2))
andre6bb92372000-06-19 08:20:03 +0000216
andre2ff7b5d2000-06-03 14:57:40 +0000217/**
218 ** platform-independent login functions
219 **/
220
Damien Miller8899ed32004-09-12 15:18:55 +1000221/*
222 * login_login(struct logininfo *) - Record a login
Kevin Stevesef4eea92001-02-05 12:42:17 +0000223 *
andre6bb92372000-06-19 08:20:03 +0000224 * Call with a pointer to a struct logininfo initialised with
225 * login_init_entry() or login_alloc_entry()
226 *
227 * Returns:
228 * >0 if successful
229 * 0 on failure (will use OpenSSH's logging facilities for diagnostics)
230 */
andre61e67252000-06-04 17:07:49 +0000231int
Damien Miller8899ed32004-09-12 15:18:55 +1000232login_login(struct logininfo *li)
andre61e67252000-06-04 17:07:49 +0000233{
234 li->type = LTYPE_LOGIN;
Damien Miller8899ed32004-09-12 15:18:55 +1000235 return (login_write(li));
andre61e67252000-06-04 17:07:49 +0000236}
237
238
Damien Miller8899ed32004-09-12 15:18:55 +1000239/*
240 * login_logout(struct logininfo *) - Record a logout
andre6bb92372000-06-19 08:20:03 +0000241 *
242 * Call as with login_login()
243 *
244 * Returns:
245 * >0 if successful
246 * 0 on failure (will use OpenSSH's logging facilities for diagnostics)
247 */
andre61e67252000-06-04 17:07:49 +0000248int
249login_logout(struct logininfo *li)
250{
251 li->type = LTYPE_LOGOUT;
Damien Miller8899ed32004-09-12 15:18:55 +1000252 return (login_write(li));
andre61e67252000-06-04 17:07:49 +0000253}
254
Damien Miller8899ed32004-09-12 15:18:55 +1000255/*
256 * login_get_lastlog_time(int) - Retrieve the last login time
andre6bb92372000-06-19 08:20:03 +0000257 *
258 * Retrieve the last login time for the given uid. Will try to use the
259 * system lastlog facilities if they are available, but will fall back
260 * to looking in wtmp/wtmpx if necessary
261 *
262 * Returns:
263 * 0 on failure, or if user has never logged in
264 * Time in seconds from the epoch if successful
265 *
266 * Useful preprocessor symbols:
267 * DISABLE_LASTLOG: If set, *never* even try to retrieve lastlog
268 * info
269 * USE_LASTLOG: If set, indicates the presence of system lastlog
270 * facilities. If this and DISABLE_LASTLOG are not set,
271 * try to retrieve lastlog information from wtmp/wtmpx.
272 */
andre61e67252000-06-04 17:07:49 +0000273unsigned int
274login_get_lastlog_time(const int uid)
275{
276 struct logininfo li;
277
andre6bb92372000-06-19 08:20:03 +0000278 if (login_get_lastlog(&li, uid))
Damien Miller8899ed32004-09-12 15:18:55 +1000279 return (li.tv_sec);
andre6bb92372000-06-19 08:20:03 +0000280 else
Damien Miller8899ed32004-09-12 15:18:55 +1000281 return (0);
andre61e67252000-06-04 17:07:49 +0000282}
283
Damien Miller8899ed32004-09-12 15:18:55 +1000284/*
285 * login_get_lastlog(struct logininfo *, int) - Retrieve a lastlog entry
andre6bb92372000-06-19 08:20:03 +0000286 *
287 * Retrieve a logininfo structure populated (only partially) with
288 * information from the system lastlog data, or from wtmp/wtmpx if no
289 * system lastlog information exists.
290 *
291 * Note this routine must be given a pre-allocated logininfo.
292 *
293 * Returns:
294 * >0: A pointer to your struct logininfo if successful
295 * 0 on failure (will use OpenSSH's logging facilities for diagnostics)
andre6bb92372000-06-19 08:20:03 +0000296 */
andre61e67252000-06-04 17:07:49 +0000297struct logininfo *
298login_get_lastlog(struct logininfo *li, const int uid)
299{
andre6bb92372000-06-19 08:20:03 +0000300 struct passwd *pw;
andre6bb92372000-06-19 08:20:03 +0000301
Damien Miller348c9b72000-08-15 10:01:22 +1000302 memset(li, '\0', sizeof(*li));
andre61e67252000-06-04 17:07:49 +0000303 li->uid = uid;
andre6bb92372000-06-19 08:20:03 +0000304
Kevin Stevesef4eea92001-02-05 12:42:17 +0000305 /*
Damien Miller53c5d462000-06-28 00:50:50 +1000306 * If we don't have a 'real' lastlog, we need the username to
andre6bb92372000-06-19 08:20:03 +0000307 * reliably search wtmp(x) for the last login (see
Kevin Stevesef4eea92001-02-05 12:42:17 +0000308 * wtmp_get_entry().)
Damien Miller53c5d462000-06-28 00:50:50 +1000309 */
andre6bb92372000-06-19 08:20:03 +0000310 pw = getpwuid(uid);
Damien Millerdd47aa22000-06-27 11:18:27 +1000311 if (pw == NULL)
Damien Miller6b0279c2004-09-12 15:25:17 +1000312 fatal("%s: Cannot find account for uid %i", __func__, uid);
Kevin Stevesef4eea92001-02-05 12:42:17 +0000313
andre98cabe02000-06-19 09:11:30 +0000314 /* No MIN_SIZEOF here - we absolutely *must not* truncate the
Damien Miller8899ed32004-09-12 15:18:55 +1000315 * username (XXX - so check for trunc!) */
Damien Millerf8af08d2000-06-27 09:40:06 +1000316 strlcpy(li->username, pw->pw_name, sizeof(li->username));
Damien Millerdd47aa22000-06-27 11:18:27 +1000317
andre61e67252000-06-04 17:07:49 +0000318 if (getlast_entry(li))
Damien Miller8899ed32004-09-12 15:18:55 +1000319 return (li);
andre61e67252000-06-04 17:07:49 +0000320 else
Damien Miller8899ed32004-09-12 15:18:55 +1000321 return (NULL);
andre61e67252000-06-04 17:07:49 +0000322}
323
324
Damien Miller8899ed32004-09-12 15:18:55 +1000325/*
326 * login_alloc_entry(int, char*, char*, char*) - Allocate and initialise
Kevin Stevesef4eea92001-02-05 12:42:17 +0000327 * a logininfo structure
328 *
andre6bb92372000-06-19 08:20:03 +0000329 * This function creates a new struct logininfo, a data structure
330 * meant to carry the information required to portably record login info.
331 *
332 * Returns a pointer to a newly created struct logininfo. If memory
333 * allocation fails, the program halts.
334 */
andre61e67252000-06-04 17:07:49 +0000335struct
336logininfo *login_alloc_entry(int pid, const char *username,
Damien Miller8899ed32004-09-12 15:18:55 +1000337 const char *hostname, const char *line)
andre61e67252000-06-04 17:07:49 +0000338{
andre2ff7b5d2000-06-03 14:57:40 +0000339 struct logininfo *newli;
340
Damien Miller8899ed32004-09-12 15:18:55 +1000341 newli = xmalloc(sizeof(*newli));
342 login_init_entry(newli, pid, username, hostname, line);
343 return (newli);
andre61e67252000-06-04 17:07:49 +0000344}
andre2ff7b5d2000-06-03 14:57:40 +0000345
346
andre6bb92372000-06-19 08:20:03 +0000347/* login_free_entry(struct logininfo *) - free struct memory */
andre61e67252000-06-04 17:07:49 +0000348void
349login_free_entry(struct logininfo *li)
350{
351 xfree(li);
352}
353
andre2ff7b5d2000-06-03 14:57:40 +0000354
andre6bb92372000-06-19 08:20:03 +0000355/* login_init_entry(struct logininfo *, int, char*, char*, char*)
356 * - initialise a struct logininfo
Kevin Stevesef4eea92001-02-05 12:42:17 +0000357 *
andre6bb92372000-06-19 08:20:03 +0000358 * Populates a new struct logininfo, a data structure meant to carry
359 * the information required to portably record login info.
360 *
361 * Returns: 1
362 */
andre61e67252000-06-04 17:07:49 +0000363int
Kevin Stevesef4eea92001-02-05 12:42:17 +0000364login_init_entry(struct logininfo *li, int pid, const char *username,
Damien Miller8899ed32004-09-12 15:18:55 +1000365 const char *hostname, const char *line)
andre61e67252000-06-04 17:07:49 +0000366{
Damien Millerf8af08d2000-06-27 09:40:06 +1000367 struct passwd *pw;
Kevin Stevesef4eea92001-02-05 12:42:17 +0000368
Damien Miller348c9b72000-08-15 10:01:22 +1000369 memset(li, 0, sizeof(*li));
Kevin Stevesef4eea92001-02-05 12:42:17 +0000370
andre61e67252000-06-04 17:07:49 +0000371 li->pid = pid;
Damien Millerf8af08d2000-06-27 09:40:06 +1000372
andre2ff7b5d2000-06-03 14:57:40 +0000373 /* set the line information */
andre61e67252000-06-04 17:07:49 +0000374 if (line)
andre2ff7b5d2000-06-03 14:57:40 +0000375 line_fullname(li->line, line, sizeof(li->line));
andre2ff7b5d2000-06-03 14:57:40 +0000376
Damien Millerf8af08d2000-06-27 09:40:06 +1000377 if (username) {
andre2ff7b5d2000-06-03 14:57:40 +0000378 strlcpy(li->username, username, sizeof(li->username));
Damien Millerf8af08d2000-06-27 09:40:06 +1000379 pw = getpwnam(li->username);
Damien Miller8899ed32004-09-12 15:18:55 +1000380 if (pw == NULL) {
Damien Miller94cf4c82005-07-17 17:04:47 +1000381 fatal("%s: Cannot find user \"%s\"", __func__,
Damien Miller8899ed32004-09-12 15:18:55 +1000382 li->username);
383 }
Damien Millerf8af08d2000-06-27 09:40:06 +1000384 li->uid = pw->pw_uid;
385 }
Damien Millerdd47aa22000-06-27 11:18:27 +1000386
andre61e67252000-06-04 17:07:49 +0000387 if (hostname)
andre2ff7b5d2000-06-03 14:57:40 +0000388 strlcpy(li->hostname, hostname, sizeof(li->hostname));
Damien Millerf8af08d2000-06-27 09:40:06 +1000389
Damien Miller8899ed32004-09-12 15:18:55 +1000390 return (1);
andre2ff7b5d2000-06-03 14:57:40 +0000391}
392
Damien Miller94cf4c82005-07-17 17:04:47 +1000393/*
Damien Miller8899ed32004-09-12 15:18:55 +1000394 * login_set_current_time(struct logininfo *) - set the current time
andre6bb92372000-06-19 08:20:03 +0000395 *
396 * Set the current time in a logininfo structure. This function is
397 * meant to eliminate the need to deal with system dependencies for
398 * time handling.
399 */
andre2ff7b5d2000-06-03 14:57:40 +0000400void
andre61e67252000-06-04 17:07:49 +0000401login_set_current_time(struct logininfo *li)
402{
andre2ff7b5d2000-06-03 14:57:40 +0000403 struct timeval tv;
404
405 gettimeofday(&tv, NULL);
Kevin Stevesef4eea92001-02-05 12:42:17 +0000406
Damien Millerf8af08d2000-06-27 09:40:06 +1000407 li->tv_sec = tv.tv_sec;
408 li->tv_usec = tv.tv_usec;
andre2ff7b5d2000-06-03 14:57:40 +0000409}
410
andre61e67252000-06-04 17:07:49 +0000411/* copy a sockaddr_* into our logininfo */
andre2ff7b5d2000-06-03 14:57:40 +0000412void
andre61e67252000-06-04 17:07:49 +0000413login_set_addr(struct logininfo *li, const struct sockaddr *sa,
Damien Miller8899ed32004-09-12 15:18:55 +1000414 const unsigned int sa_size)
andre61e67252000-06-04 17:07:49 +0000415{
416 unsigned int bufsize = sa_size;
417
418 /* make sure we don't overrun our union */
419 if (sizeof(li->hostaddr) < sa_size)
420 bufsize = sizeof(li->hostaddr);
421
Damien Miller8899ed32004-09-12 15:18:55 +1000422 memcpy(&li->hostaddr.sa, sa, bufsize);
andre2ff7b5d2000-06-03 14:57:40 +0000423}
424
andre2ff7b5d2000-06-03 14:57:40 +0000425
andre61e67252000-06-04 17:07:49 +0000426/**
427 ** login_write: Call low-level recording functions based on autoconf
428 ** results
429 **/
andre2ff7b5d2000-06-03 14:57:40 +0000430int
Damien Miller8899ed32004-09-12 15:18:55 +1000431login_write(struct logininfo *li)
andre61e67252000-06-04 17:07:49 +0000432{
Damien Millerbac2d8a2000-09-05 16:13:06 +1100433#ifndef HAVE_CYGWIN
Damien Miller8899ed32004-09-12 15:18:55 +1000434 if (geteuid() != 0) {
435 logit("Attempt to write login records by non-root user (aborting)");
436 return (1);
andre2ff7b5d2000-06-03 14:57:40 +0000437 }
Damien Millerbac2d8a2000-09-05 16:13:06 +1100438#endif
Damien Millerdd47aa22000-06-27 11:18:27 +1000439
andre2ff7b5d2000-06-03 14:57:40 +0000440 /* set the timestamp */
441 login_set_current_time(li);
442#ifdef USE_LOGIN
443 syslogin_write_entry(li);
444#endif
445#ifdef USE_LASTLOG
Damien Miller8899ed32004-09-12 15:18:55 +1000446 if (li->type == LTYPE_LOGIN)
andre2ff7b5d2000-06-03 14:57:40 +0000447 lastlog_write_entry(li);
andre2ff7b5d2000-06-03 14:57:40 +0000448#endif
449#ifdef USE_UTMP
450 utmp_write_entry(li);
451#endif
452#ifdef USE_WTMP
453 wtmp_write_entry(li);
454#endif
455#ifdef USE_UTMPX
456 utmpx_write_entry(li);
457#endif
458#ifdef USE_WTMPX
459 wtmpx_write_entry(li);
460#endif
Darren Tucker397a2f22004-08-15 00:09:11 +1000461#ifdef CUSTOM_SYS_AUTH_RECORD_LOGIN
Damien Miller94cf4c82005-07-17 17:04:47 +1000462 if (li->type == LTYPE_LOGIN &&
Damien Millerb6f72f52005-07-17 17:26:43 +1000463 !sys_auth_record_login(li->username,li->hostname,li->line,
464 &loginmsg))
Darren Tucker397a2f22004-08-15 00:09:11 +1000465 logit("Writing login record failed for %s", li->username);
466#endif
Darren Tucker2e0cf0d2005-02-08 21:52:47 +1100467#ifdef SSH_AUDIT_EVENTS
Darren Tucker269a1ea2005-02-03 00:20:53 +1100468 if (li->type == LTYPE_LOGIN)
469 audit_session_open(li->line);
470 else if (li->type == LTYPE_LOGOUT)
471 audit_session_close(li->line);
472#endif
Damien Miller8899ed32004-09-12 15:18:55 +1000473 return (0);
andre2ff7b5d2000-06-03 14:57:40 +0000474}
475
Ben Lindstrom97c677d2001-05-08 20:33:05 +0000476#ifdef LOGIN_NEEDS_UTMPX
477int
478login_utmp_only(struct logininfo *li)
479{
Damien Millera8e06ce2003-11-21 23:48:55 +1100480 li->type = LTYPE_LOGIN;
Ben Lindstrom9197c592001-10-26 15:56:55 +0000481 login_set_current_time(li);
Ben Lindstrom97c677d2001-05-08 20:33:05 +0000482# ifdef USE_UTMP
483 utmp_write_entry(li);
484# endif
485# ifdef USE_WTMP
486 wtmp_write_entry(li);
487# endif
488# ifdef USE_UTMPX
489 utmpx_write_entry(li);
490# endif
491# ifdef USE_WTMPX
492 wtmpx_write_entry(li);
493# endif
Damien Miller8899ed32004-09-12 15:18:55 +1000494 return (0);
Ben Lindstrom97c677d2001-05-08 20:33:05 +0000495}
496#endif
497
andre2ff7b5d2000-06-03 14:57:40 +0000498/**
andre61e67252000-06-04 17:07:49 +0000499 ** getlast_entry: Call low-level functions to retrieve the last login
500 ** time.
andre2ff7b5d2000-06-03 14:57:40 +0000501 **/
502
andre61e67252000-06-04 17:07:49 +0000503/* take the uid in li and return the last login time */
504int
505getlast_entry(struct logininfo *li)
506{
507#ifdef USE_LASTLOG
Damien Miller53c5d462000-06-28 00:50:50 +1000508 return(lastlog_get_entry(li));
Damien Millerdd47aa22000-06-27 11:18:27 +1000509#else /* !USE_LASTLOG */
andre61e67252000-06-04 17:07:49 +0000510
Damien Miller8899ed32004-09-12 15:18:55 +1000511#if defined(DISABLE_LASTLOG)
Kevin Stevesef4eea92001-02-05 12:42:17 +0000512 /* On some systems we shouldn't even try to obtain last login
andreecaabf12000-06-12 22:21:44 +0000513 * time, e.g. AIX */
Damien Miller8899ed32004-09-12 15:18:55 +1000514 return (0);
515# elif defined(USE_WTMP) && \
516 (defined(HAVE_TIME_IN_UTMP) || defined(HAVE_TV_IN_UTMP))
andre61e67252000-06-04 17:07:49 +0000517 /* retrieve last login time from utmp */
Damien Millerdd47aa22000-06-27 11:18:27 +1000518 return (wtmp_get_entry(li));
Damien Miller8899ed32004-09-12 15:18:55 +1000519# elif defined(USE_WTMPX) && \
520 (defined(HAVE_TIME_IN_UTMPX) || defined(HAVE_TV_IN_UTMPX))
andre61e67252000-06-04 17:07:49 +0000521 /* If wtmp isn't available, try wtmpx */
Damien Millerdd47aa22000-06-27 11:18:27 +1000522 return (wtmpx_get_entry(li));
Damien Miller8899ed32004-09-12 15:18:55 +1000523# else
andre61e67252000-06-04 17:07:49 +0000524 /* Give up: No means of retrieving last login time */
Damien Miller8899ed32004-09-12 15:18:55 +1000525 return (0);
Kevin Stevesef4eea92001-02-05 12:42:17 +0000526# endif /* DISABLE_LASTLOG */
Damien Millerdd47aa22000-06-27 11:18:27 +1000527#endif /* USE_LASTLOG */
andre61e67252000-06-04 17:07:49 +0000528}
529
530
531
andre2ff7b5d2000-06-03 14:57:40 +0000532/*
andre61e67252000-06-04 17:07:49 +0000533 * 'line' string utility functions
534 *
535 * These functions process the 'line' string into one of three forms:
536 *
andre2ff7b5d2000-06-03 14:57:40 +0000537 * 1. The full filename (including '/dev')
538 * 2. The stripped name (excluding '/dev')
andre61e67252000-06-04 17:07:49 +0000539 * 3. The abbreviated name (e.g. /dev/ttyp00 -> yp00
540 * /dev/pts/1 -> ts/1 )
andre2ff7b5d2000-06-03 14:57:40 +0000541 *
542 * Form 3 is used on some systems to identify a .tmp.? entry when
543 * attempting to remove it. Typically both addition and removal is
andre61e67252000-06-04 17:07:49 +0000544 * performed by one application - say, sshd - so as long as the choice
545 * uniquely identifies a terminal it's ok.
andre2ff7b5d2000-06-03 14:57:40 +0000546 */
547
548
Damien Miller8899ed32004-09-12 15:18:55 +1000549/*
550 * line_fullname(): add the leading '/dev/' if it doesn't exist make
551 * sure dst has enough space, if not just copy src (ugh)
552 */
andre2ff7b5d2000-06-03 14:57:40 +0000553char *
Damien Miller52c8afe2005-06-19 10:19:43 +1000554line_fullname(char *dst, const char *src, u_int dstsize)
andre61e67252000-06-04 17:07:49 +0000555{
andre2ff7b5d2000-06-03 14:57:40 +0000556 memset(dst, '\0', dstsize);
Damien Miller8899ed32004-09-12 15:18:55 +1000557 if ((strncmp(src, "/dev/", 5) == 0) || (dstsize < (strlen(src) + 5)))
andre2ff7b5d2000-06-03 14:57:40 +0000558 strlcpy(dst, src, dstsize);
Damien Miller8899ed32004-09-12 15:18:55 +1000559 else {
Damien Miller1a132252000-06-13 21:23:17 +1000560 strlcpy(dst, "/dev/", dstsize);
andre2ff7b5d2000-06-03 14:57:40 +0000561 strlcat(dst, src, dstsize);
562 }
Damien Miller8899ed32004-09-12 15:18:55 +1000563 return (dst);
andre2ff7b5d2000-06-03 14:57:40 +0000564}
565
andre61e67252000-06-04 17:07:49 +0000566/* line_stripname(): strip the leading '/dev' if it exists, return dst */
andre2ff7b5d2000-06-03 14:57:40 +0000567char *
andre61e67252000-06-04 17:07:49 +0000568line_stripname(char *dst, const char *src, int dstsize)
569{
andre2ff7b5d2000-06-03 14:57:40 +0000570 memset(dst, '\0', dstsize);
571 if (strncmp(src, "/dev/", 5) == 0)
Damien Millerf5a81472000-09-30 21:34:44 +1100572 strlcpy(dst, src + 5, dstsize);
andre2ff7b5d2000-06-03 14:57:40 +0000573 else
574 strlcpy(dst, src, dstsize);
Damien Miller8899ed32004-09-12 15:18:55 +1000575 return (dst);
andre61e67252000-06-04 17:07:49 +0000576}
577
Damien Miller94cf4c82005-07-17 17:04:47 +1000578/*
Damien Miller8899ed32004-09-12 15:18:55 +1000579 * line_abbrevname(): Return the abbreviated (usually four-character)
andre61e67252000-06-04 17:07:49 +0000580 * form of the line (Just use the last <dstsize> characters of the
581 * full name.)
582 *
583 * NOTE: use strncpy because we do NOT necessarily want zero
Damien Miller8899ed32004-09-12 15:18:55 +1000584 * termination
585 */
andre2ff7b5d2000-06-03 14:57:40 +0000586char *
Kevin Stevesef4eea92001-02-05 12:42:17 +0000587line_abbrevname(char *dst, const char *src, int dstsize)
Damien Millerdd47aa22000-06-27 11:18:27 +1000588{
589 size_t len;
Kevin Stevesef4eea92001-02-05 12:42:17 +0000590
andre2ff7b5d2000-06-03 14:57:40 +0000591 memset(dst, '\0', dstsize);
Kevin Stevesef4eea92001-02-05 12:42:17 +0000592
Damien Miller8e81ed32000-07-01 13:17:42 +1000593 /* Always skip prefix if present */
594 if (strncmp(src, "/dev/", 5) == 0)
595 src += 5;
Kevin Stevesef4eea92001-02-05 12:42:17 +0000596
Damien Millerf1b9d112002-04-23 23:09:19 +1000597#ifdef WITH_ABBREV_NO_TTY
598 if (strncmp(src, "tty", 3) == 0)
599 src += 3;
600#endif
601
Damien Millerdd47aa22000-06-27 11:18:27 +1000602 len = strlen(src);
603
Damien Miller8e81ed32000-07-01 13:17:42 +1000604 if (len > 0) {
605 if (((int)len - dstsize) > 0)
606 src += ((int)len - dstsize);
607
608 /* note: _don't_ change this to strlcpy */
Kevin Stevesef4eea92001-02-05 12:42:17 +0000609 strncpy(dst, src, (size_t)dstsize);
Damien Millerdd47aa22000-06-27 11:18:27 +1000610 }
Kevin Stevesef4eea92001-02-05 12:42:17 +0000611
Damien Miller8899ed32004-09-12 15:18:55 +1000612 return (dst);
andre2ff7b5d2000-06-03 14:57:40 +0000613}
614
andre2ff7b5d2000-06-03 14:57:40 +0000615/**
616 ** utmp utility functions
andre61e67252000-06-04 17:07:49 +0000617 **
618 ** These functions manipulate struct utmp, taking system differences
619 ** into account.
andre2ff7b5d2000-06-03 14:57:40 +0000620 **/
621
622#if defined(USE_UTMP) || defined (USE_WTMP) || defined (USE_LOGIN)
623
andre2ff7b5d2000-06-03 14:57:40 +0000624/* build the utmp structure */
625void
andre61e67252000-06-04 17:07:49 +0000626set_utmp_time(struct logininfo *li, struct utmp *ut)
627{
Damien Miller8899ed32004-09-12 15:18:55 +1000628# if defined(HAVE_TV_IN_UTMP)
andre2ff7b5d2000-06-03 14:57:40 +0000629 ut->ut_tv.tv_sec = li->tv_sec;
630 ut->ut_tv.tv_usec = li->tv_usec;
Damien Miller8899ed32004-09-12 15:18:55 +1000631# elif defined(HAVE_TIME_IN_UTMP)
andre2ff7b5d2000-06-03 14:57:40 +0000632 ut->ut_time = li->tv_sec;
Damien Millerdd47aa22000-06-27 11:18:27 +1000633# endif
andre2ff7b5d2000-06-03 14:57:40 +0000634}
635
636void
637construct_utmp(struct logininfo *li,
andre61e67252000-06-04 17:07:49 +0000638 struct utmp *ut)
639{
Damien Miller02e16ad2003-01-03 14:42:27 +1100640# ifdef HAVE_ADDR_V6_IN_UTMP
641 struct sockaddr_in6 *sa6;
Damien Miller8899ed32004-09-12 15:18:55 +1000642# endif
643
Damien Miller348c9b72000-08-15 10:01:22 +1000644 memset(ut, '\0', sizeof(*ut));
andre6bb92372000-06-19 08:20:03 +0000645
646 /* First fill out fields used for both logins and logouts */
647
Damien Millerdd47aa22000-06-27 11:18:27 +1000648# ifdef HAVE_ID_IN_UTMP
andre2ff7b5d2000-06-03 14:57:40 +0000649 line_abbrevname(ut->ut_id, li->line, sizeof(ut->ut_id));
Damien Millerdd47aa22000-06-27 11:18:27 +1000650# endif
andre2ff7b5d2000-06-03 14:57:40 +0000651
Damien Millerdd47aa22000-06-27 11:18:27 +1000652# ifdef HAVE_TYPE_IN_UTMP
andre6bb92372000-06-19 08:20:03 +0000653 /* This is done here to keep utmp constants out of struct logininfo */
andre2ff7b5d2000-06-03 14:57:40 +0000654 switch (li->type) {
655 case LTYPE_LOGIN:
656 ut->ut_type = USER_PROCESS;
Tim Rice81ed5182002-09-25 17:38:46 -0700657#ifdef _UNICOS
Ben Lindstrom6db66ff2001-08-06 23:29:16 +0000658 cray_set_tmpdir(ut);
659#endif
andre2ff7b5d2000-06-03 14:57:40 +0000660 break;
661 case LTYPE_LOGOUT:
662 ut->ut_type = DEAD_PROCESS;
Tim Rice81ed5182002-09-25 17:38:46 -0700663#ifdef _UNICOS
Ben Lindstrom6db66ff2001-08-06 23:29:16 +0000664 cray_retain_utmp(ut, li->pid);
665#endif
andre2ff7b5d2000-06-03 14:57:40 +0000666 break;
667 }
Damien Millerdd47aa22000-06-27 11:18:27 +1000668# endif
andre6bb92372000-06-19 08:20:03 +0000669 set_utmp_time(li, ut);
andre2ff7b5d2000-06-03 14:57:40 +0000670
andre6bb92372000-06-19 08:20:03 +0000671 line_stripname(ut->ut_line, li->line, sizeof(ut->ut_line));
Damien Millerdd47aa22000-06-27 11:18:27 +1000672
673# ifdef HAVE_PID_IN_UTMP
andre2ff7b5d2000-06-03 14:57:40 +0000674 ut->ut_pid = li->pid;
Damien Millerdd47aa22000-06-27 11:18:27 +1000675# endif
andre6bb92372000-06-19 08:20:03 +0000676
677 /* If we're logging out, leave all other fields blank */
678 if (li->type == LTYPE_LOGOUT)
Damien Miller8899ed32004-09-12 15:18:55 +1000679 return;
andre6bb92372000-06-19 08:20:03 +0000680
Damien Millerdd47aa22000-06-27 11:18:27 +1000681 /*
682 * These fields are only used when logging in, and are blank
Kevin Stevesef4eea92001-02-05 12:42:17 +0000683 * for logouts.
Damien Millerdd47aa22000-06-27 11:18:27 +1000684 */
andre6bb92372000-06-19 08:20:03 +0000685
686 /* Use strncpy because we don't necessarily want null termination */
Damien Miller8899ed32004-09-12 15:18:55 +1000687 strncpy(ut->ut_name, li->username,
688 MIN_SIZEOF(ut->ut_name, li->username));
Damien Millerdd47aa22000-06-27 11:18:27 +1000689# ifdef HAVE_HOST_IN_UTMP
Damien Miller8899ed32004-09-12 15:18:55 +1000690 strncpy(ut->ut_host, li->hostname,
691 MIN_SIZEOF(ut->ut_host, li->hostname));
Damien Millerdd47aa22000-06-27 11:18:27 +1000692# endif
693# ifdef HAVE_ADDR_IN_UTMP
andre61e67252000-06-04 17:07:49 +0000694 /* this is just a 32-bit IP address */
695 if (li->hostaddr.sa.sa_family == AF_INET)
696 ut->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr;
Kevin Stevesef4eea92001-02-05 12:42:17 +0000697# endif
Damien Miller02e16ad2003-01-03 14:42:27 +1100698# ifdef HAVE_ADDR_V6_IN_UTMP
699 /* this is just a 128-bit IPv6 address */
700 if (li->hostaddr.sa.sa_family == AF_INET6) {
701 sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa);
702 memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16);
703 if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) {
704 ut->ut_addr_v6[0] = ut->ut_addr_v6[3];
705 ut->ut_addr_v6[1] = 0;
706 ut->ut_addr_v6[2] = 0;
707 ut->ut_addr_v6[3] = 0;
708 }
709 }
710# endif
andre61e67252000-06-04 17:07:49 +0000711}
Damien Millerdd47aa22000-06-27 11:18:27 +1000712#endif /* USE_UTMP || USE_WTMP || USE_LOGIN */
andre61e67252000-06-04 17:07:49 +0000713
andre2ff7b5d2000-06-03 14:57:40 +0000714/**
715 ** utmpx utility functions
andre61e67252000-06-04 17:07:49 +0000716 **
717 ** These functions manipulate struct utmpx, accounting for system
718 ** variations.
andre2ff7b5d2000-06-03 14:57:40 +0000719 **/
720
721#if defined(USE_UTMPX) || defined (USE_WTMPX)
andre2ff7b5d2000-06-03 14:57:40 +0000722/* build the utmpx structure */
723void
andre61e67252000-06-04 17:07:49 +0000724set_utmpx_time(struct logininfo *li, struct utmpx *utx)
725{
Damien Miller8899ed32004-09-12 15:18:55 +1000726# if defined(HAVE_TV_IN_UTMPX)
andre2ff7b5d2000-06-03 14:57:40 +0000727 utx->ut_tv.tv_sec = li->tv_sec;
728 utx->ut_tv.tv_usec = li->tv_usec;
Damien Miller8899ed32004-09-12 15:18:55 +1000729# elif defined(HAVE_TIME_IN_UTMPX)
andre2ff7b5d2000-06-03 14:57:40 +0000730 utx->ut_time = li->tv_sec;
Damien Miller8899ed32004-09-12 15:18:55 +1000731# endif
andre2ff7b5d2000-06-03 14:57:40 +0000732}
733
andre61e67252000-06-04 17:07:49 +0000734void
735construct_utmpx(struct logininfo *li, struct utmpx *utx)
736{
Damien Miller02e16ad2003-01-03 14:42:27 +1100737# ifdef HAVE_ADDR_V6_IN_UTMP
738 struct sockaddr_in6 *sa6;
739# endif
Damien Miller348c9b72000-08-15 10:01:22 +1000740 memset(utx, '\0', sizeof(*utx));
Damien Miller8899ed32004-09-12 15:18:55 +1000741
Damien Miller8e81ed32000-07-01 13:17:42 +1000742# ifdef HAVE_ID_IN_UTMPX
andre2ff7b5d2000-06-03 14:57:40 +0000743 line_abbrevname(utx->ut_id, li->line, sizeof(utx->ut_id));
Damien Miller8e81ed32000-07-01 13:17:42 +1000744# endif
andre2ff7b5d2000-06-03 14:57:40 +0000745
746 /* this is done here to keep utmp constants out of loginrec.h */
747 switch (li->type) {
748 case LTYPE_LOGIN:
749 utx->ut_type = USER_PROCESS;
750 break;
751 case LTYPE_LOGOUT:
752 utx->ut_type = DEAD_PROCESS;
753 break;
754 }
andre2ff7b5d2000-06-03 14:57:40 +0000755 line_stripname(utx->ut_line, li->line, sizeof(utx->ut_line));
andre2ff7b5d2000-06-03 14:57:40 +0000756 set_utmpx_time(li, utx);
andre6bb92372000-06-19 08:20:03 +0000757 utx->ut_pid = li->pid;
Damien Miller8899ed32004-09-12 15:18:55 +1000758
Tim Ricee06ae4a2002-02-24 17:56:46 -0800759 /* strncpy(): Don't necessarily want null termination */
Damien Miller8899ed32004-09-12 15:18:55 +1000760 strncpy(utx->ut_name, li->username,
761 MIN_SIZEOF(utx->ut_name, li->username));
andre6bb92372000-06-19 08:20:03 +0000762
763 if (li->type == LTYPE_LOGOUT)
764 return;
765
Damien Millerdd47aa22000-06-27 11:18:27 +1000766 /*
767 * These fields are only used when logging in, and are blank
Kevin Stevesef4eea92001-02-05 12:42:17 +0000768 * for logouts.
Damien Millerdd47aa22000-06-27 11:18:27 +1000769 */
andre6bb92372000-06-19 08:20:03 +0000770
Damien Millerdd47aa22000-06-27 11:18:27 +1000771# ifdef HAVE_HOST_IN_UTMPX
Damien Miller8899ed32004-09-12 15:18:55 +1000772 strncpy(utx->ut_host, li->hostname,
773 MIN_SIZEOF(utx->ut_host, li->hostname));
Damien Millerdd47aa22000-06-27 11:18:27 +1000774# endif
775# ifdef HAVE_ADDR_IN_UTMPX
Damien Millerd6f204d2000-09-23 13:57:27 +1100776 /* this is just a 32-bit IP address */
777 if (li->hostaddr.sa.sa_family == AF_INET)
778 utx->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr;
Damien Millerdd47aa22000-06-27 11:18:27 +1000779# endif
Damien Miller02e16ad2003-01-03 14:42:27 +1100780# ifdef HAVE_ADDR_V6_IN_UTMP
781 /* this is just a 128-bit IPv6 address */
782 if (li->hostaddr.sa.sa_family == AF_INET6) {
783 sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa);
784 memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16);
785 if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) {
786 ut->ut_addr_v6[0] = ut->ut_addr_v6[3];
787 ut->ut_addr_v6[1] = 0;
788 ut->ut_addr_v6[2] = 0;
789 ut->ut_addr_v6[3] = 0;
790 }
791 }
792# endif
Damien Millerdd47aa22000-06-27 11:18:27 +1000793# ifdef HAVE_SYSLEN_IN_UTMPX
andre6bb92372000-06-19 08:20:03 +0000794 /* ut_syslen is the length of the utx_host string */
795 utx->ut_syslen = MIN(strlen(li->hostname), sizeof(utx->ut_host));
Damien Millerdd47aa22000-06-27 11:18:27 +1000796# endif
andre61e67252000-06-04 17:07:49 +0000797}
Damien Millerdd47aa22000-06-27 11:18:27 +1000798#endif /* USE_UTMPX || USE_WTMPX */
andre2ff7b5d2000-06-03 14:57:40 +0000799
800/**
andre61e67252000-06-04 17:07:49 +0000801 ** Low-level utmp functions
andre2ff7b5d2000-06-03 14:57:40 +0000802 **/
803
804/* FIXME: (ATL) utmp_write_direct needs testing */
andre2ff7b5d2000-06-03 14:57:40 +0000805#ifdef USE_UTMP
806
andre2ff7b5d2000-06-03 14:57:40 +0000807/* if we can, use pututline() etc. */
Damien Millerdd47aa22000-06-27 11:18:27 +1000808# if !defined(DISABLE_PUTUTLINE) && defined(HAVE_SETUTENT) && \
809 defined(HAVE_PUTUTLINE)
andre2ff7b5d2000-06-03 14:57:40 +0000810# define UTMP_USE_LIBRARY
Damien Millerdd47aa22000-06-27 11:18:27 +1000811# endif
andre2ff7b5d2000-06-03 14:57:40 +0000812
813
814/* write a utmp entry with the system's help (pututline() and pals) */
Damien Millerdd47aa22000-06-27 11:18:27 +1000815# ifdef UTMP_USE_LIBRARY
andre2ff7b5d2000-06-03 14:57:40 +0000816static int
andre61e67252000-06-04 17:07:49 +0000817utmp_write_library(struct logininfo *li, struct utmp *ut)
818{
andre2ff7b5d2000-06-03 14:57:40 +0000819 setutent();
820 pututline(ut);
Damien Millerdd47aa22000-06-27 11:18:27 +1000821# ifdef HAVE_ENDUTENT
andre2ff7b5d2000-06-03 14:57:40 +0000822 endutent();
Damien Millerdd47aa22000-06-27 11:18:27 +1000823# endif
Damien Miller8899ed32004-09-12 15:18:55 +1000824 return (1);
andre61e67252000-06-04 17:07:49 +0000825}
Damien Millerdd47aa22000-06-27 11:18:27 +1000826# else /* UTMP_USE_LIBRARY */
andre2ff7b5d2000-06-03 14:57:40 +0000827
Damien Miller94cf4c82005-07-17 17:04:47 +1000828/*
Damien Miller8899ed32004-09-12 15:18:55 +1000829 * Write a utmp entry direct to the file
830 * This is a slightly modification of code in OpenBSD's login.c
831 */
andre2ff7b5d2000-06-03 14:57:40 +0000832static int
andre61e67252000-06-04 17:07:49 +0000833utmp_write_direct(struct logininfo *li, struct utmp *ut)
834{
andre2ff7b5d2000-06-03 14:57:40 +0000835 struct utmp old_ut;
836 register int fd;
837 int tty;
838
andre6bb92372000-06-19 08:20:03 +0000839 /* FIXME: (ATL) ttyslot() needs local implementation */
Damien Miller348c9b72000-08-15 10:01:22 +1000840
Damien Millere5192fa2000-08-29 14:30:37 +1100841#if defined(HAVE_GETTTYENT)
Damien Miller8899ed32004-09-12 15:18:55 +1000842 struct ttyent *ty;
Damien Miller348c9b72000-08-15 10:01:22 +1000843
844 tty=0;
Damien Miller348c9b72000-08-15 10:01:22 +1000845 setttyent();
Damien Miller8899ed32004-09-12 15:18:55 +1000846 while (NULL != (ty = getttyent())) {
Damien Miller348c9b72000-08-15 10:01:22 +1000847 tty++;
848 if (!strncmp(ty->ty_name, ut->ut_line, sizeof(ut->ut_line)))
849 break;
850 }
851 endttyent();
852
Damien Miller8899ed32004-09-12 15:18:55 +1000853 if (NULL == ty) {
Damien Miller81409592004-08-15 19:12:52 +1000854 logit("%s: tty not found", __func__);
855 return (0);
Damien Miller348c9b72000-08-15 10:01:22 +1000856 }
857#else /* FIXME */
858
andre2ff7b5d2000-06-03 14:57:40 +0000859 tty = ttyslot(); /* seems only to work for /dev/ttyp? style names */
860
Damien Millere5192fa2000-08-29 14:30:37 +1100861#endif /* HAVE_GETTTYENT */
Damien Miller348c9b72000-08-15 10:01:22 +1000862
andre2ff7b5d2000-06-03 14:57:40 +0000863 if (tty > 0 && (fd = open(UTMP_FILE, O_RDWR|O_CREAT, 0644)) >= 0) {
Damien Miller81409592004-08-15 19:12:52 +1000864 off_t pos, ret;
865
866 pos = (off_t)tty * sizeof(struct utmp);
867 if ((ret = lseek(fd, pos, SEEK_SET)) == -1) {
Damien Millerb0419f22004-08-23 21:53:28 +1000868 logit("%s: lseek: %s", __func__, strerror(errno));
Damien Miller81409592004-08-15 19:12:52 +1000869 return (0);
870 }
871 if (ret != pos) {
Damien Miller94cf4c82005-07-17 17:04:47 +1000872 logit("%s: Couldn't seek to tty %d slot in %s",
Damien Millerb0419f22004-08-23 21:53:28 +1000873 __func__, tty, UTMP_FILE);
Damien Miller81409592004-08-15 19:12:52 +1000874 return (0);
875 }
andre2ff7b5d2000-06-03 14:57:40 +0000876 /*
877 * Prevent luser from zero'ing out ut_host.
878 * If the new ut_line is empty but the old one is not
Damien Miller7a0e5dc2000-07-11 12:15:54 +1000879 * and ut_line and ut_name match, preserve the old ut_line.
andre2ff7b5d2000-06-03 14:57:40 +0000880 */
Kevin Stevesef4eea92001-02-05 12:42:17 +0000881 if (atomicio(read, fd, &old_ut, sizeof(old_ut)) == sizeof(old_ut) &&
Damien Miller8899ed32004-09-12 15:18:55 +1000882 (ut->ut_host[0] == '\0') && (old_ut.ut_host[0] != '\0') &&
883 (strncmp(old_ut.ut_line, ut->ut_line, sizeof(ut->ut_line)) == 0) &&
884 (strncmp(old_ut.ut_name, ut->ut_name, sizeof(ut->ut_name)) == 0))
885 memcpy(ut->ut_host, old_ut.ut_host, sizeof(ut->ut_host));
Kevin Stevesef4eea92001-02-05 12:42:17 +0000886
Damien Miller81409592004-08-15 19:12:52 +1000887 if ((ret = lseek(fd, pos, SEEK_SET)) == -1) {
Damien Millerb0419f22004-08-23 21:53:28 +1000888 logit("%s: lseek: %s", __func__, strerror(errno));
Damien Miller81409592004-08-15 19:12:52 +1000889 return (0);
890 }
891 if (ret != pos) {
Damien Millerb0419f22004-08-23 21:53:28 +1000892 logit("%s: Couldn't seek to tty %d slot in %s",
Damien Miller81409592004-08-15 19:12:52 +1000893 __func__, tty, UTMP_FILE);
894 return (0);
895 }
Damien Miller8899ed32004-09-12 15:18:55 +1000896 if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) {
Damien Miller81409592004-08-15 19:12:52 +1000897 logit("%s: error writing %s: %s", __func__,
andre6bb92372000-06-19 08:20:03 +0000898 UTMP_FILE, strerror(errno));
Damien Miller8899ed32004-09-12 15:18:55 +1000899 }
Kevin Stevesef4eea92001-02-05 12:42:17 +0000900
Damien Miller8899ed32004-09-12 15:18:55 +1000901 close(fd);
902 return (1);
Damien Miller53c5d462000-06-28 00:50:50 +1000903 } else {
Damien Miller8899ed32004-09-12 15:18:55 +1000904 return (0);
Damien Miller53c5d462000-06-28 00:50:50 +1000905 }
andre61e67252000-06-04 17:07:49 +0000906}
Damien Millerdd47aa22000-06-27 11:18:27 +1000907# endif /* UTMP_USE_LIBRARY */
andre2ff7b5d2000-06-03 14:57:40 +0000908
909static int
andre61e67252000-06-04 17:07:49 +0000910utmp_perform_login(struct logininfo *li)
911{
andre2ff7b5d2000-06-03 14:57:40 +0000912 struct utmp ut;
913
914 construct_utmp(li, &ut);
Damien Millerdd47aa22000-06-27 11:18:27 +1000915# ifdef UTMP_USE_LIBRARY
andre2ff7b5d2000-06-03 14:57:40 +0000916 if (!utmp_write_library(li, &ut)) {
Damien Miller6b0279c2004-09-12 15:25:17 +1000917 logit("%s: utmp_write_library() failed", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +1000918 return (0);
andre2ff7b5d2000-06-03 14:57:40 +0000919 }
Damien Millerdd47aa22000-06-27 11:18:27 +1000920# else
andre2ff7b5d2000-06-03 14:57:40 +0000921 if (!utmp_write_direct(li, &ut)) {
Damien Miller6b0279c2004-09-12 15:25:17 +1000922 logit("%s: utmp_write_direct() failed", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +1000923 return (0);
andre2ff7b5d2000-06-03 14:57:40 +0000924 }
Damien Millerdd47aa22000-06-27 11:18:27 +1000925# endif
Damien Miller8899ed32004-09-12 15:18:55 +1000926 return (1);
andre61e67252000-06-04 17:07:49 +0000927}
andre2ff7b5d2000-06-03 14:57:40 +0000928
929
930static int
andre61e67252000-06-04 17:07:49 +0000931utmp_perform_logout(struct logininfo *li)
932{
andre2ff7b5d2000-06-03 14:57:40 +0000933 struct utmp ut;
934
andre6bb92372000-06-19 08:20:03 +0000935 construct_utmp(li, &ut);
Damien Millerdd47aa22000-06-27 11:18:27 +1000936# ifdef UTMP_USE_LIBRARY
andre6bb92372000-06-19 08:20:03 +0000937 if (!utmp_write_library(li, &ut)) {
Damien Miller6b0279c2004-09-12 15:25:17 +1000938 logit("%s: utmp_write_library() failed", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +1000939 return (0);
andre6bb92372000-06-19 08:20:03 +0000940 }
Damien Millerdd47aa22000-06-27 11:18:27 +1000941# else
andre6bb92372000-06-19 08:20:03 +0000942 if (!utmp_write_direct(li, &ut)) {
Damien Miller6b0279c2004-09-12 15:25:17 +1000943 logit("%s: utmp_write_direct() failed", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +1000944 return (0);
andre6bb92372000-06-19 08:20:03 +0000945 }
Damien Millerdd47aa22000-06-27 11:18:27 +1000946# endif
Damien Miller8899ed32004-09-12 15:18:55 +1000947 return (1);
andre61e67252000-06-04 17:07:49 +0000948}
andre2ff7b5d2000-06-03 14:57:40 +0000949
950
951int
andre61e67252000-06-04 17:07:49 +0000952utmp_write_entry(struct logininfo *li)
953{
andre2ff7b5d2000-06-03 14:57:40 +0000954 switch(li->type) {
955 case LTYPE_LOGIN:
Damien Miller8899ed32004-09-12 15:18:55 +1000956 return (utmp_perform_login(li));
andre2ff7b5d2000-06-03 14:57:40 +0000957
958 case LTYPE_LOGOUT:
Damien Miller8899ed32004-09-12 15:18:55 +1000959 return (utmp_perform_logout(li));
andre2ff7b5d2000-06-03 14:57:40 +0000960
961 default:
Damien Miller6b0279c2004-09-12 15:25:17 +1000962 logit("%s: invalid type field", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +1000963 return (0);
andre2ff7b5d2000-06-03 14:57:40 +0000964 }
andre61e67252000-06-04 17:07:49 +0000965}
Damien Millerdd47aa22000-06-27 11:18:27 +1000966#endif /* USE_UTMP */
andre2ff7b5d2000-06-03 14:57:40 +0000967
968
969/**
andre61e67252000-06-04 17:07:49 +0000970 ** Low-level utmpx functions
andre2ff7b5d2000-06-03 14:57:40 +0000971 **/
972
973/* not much point if we don't want utmpx entries */
974#ifdef USE_UTMPX
975
andre2ff7b5d2000-06-03 14:57:40 +0000976/* if we have the wherewithall, use pututxline etc. */
Damien Millerdd47aa22000-06-27 11:18:27 +1000977# if !defined(DISABLE_PUTUTXLINE) && defined(HAVE_SETUTXENT) && \
978 defined(HAVE_PUTUTXLINE)
andre2ff7b5d2000-06-03 14:57:40 +0000979# define UTMPX_USE_LIBRARY
Damien Millerdd47aa22000-06-27 11:18:27 +1000980# endif
andre2ff7b5d2000-06-03 14:57:40 +0000981
982
983/* write a utmpx entry with the system's help (pututxline() and pals) */
Damien Millerdd47aa22000-06-27 11:18:27 +1000984# ifdef UTMPX_USE_LIBRARY
andre2ff7b5d2000-06-03 14:57:40 +0000985static int
andre61e67252000-06-04 17:07:49 +0000986utmpx_write_library(struct logininfo *li, struct utmpx *utx)
987{
andre2ff7b5d2000-06-03 14:57:40 +0000988 setutxent();
989 pututxline(utx);
990
Damien Millerdd47aa22000-06-27 11:18:27 +1000991# ifdef HAVE_ENDUTXENT
andre2ff7b5d2000-06-03 14:57:40 +0000992 endutxent();
Damien Millerdd47aa22000-06-27 11:18:27 +1000993# endif
Damien Miller8899ed32004-09-12 15:18:55 +1000994 return (1);
andre61e67252000-06-04 17:07:49 +0000995}
andre2ff7b5d2000-06-03 14:57:40 +0000996
Damien Millerdd47aa22000-06-27 11:18:27 +1000997# else /* UTMPX_USE_LIBRARY */
andre2ff7b5d2000-06-03 14:57:40 +0000998
999/* write a utmp entry direct to the file */
1000static int
andre61e67252000-06-04 17:07:49 +00001001utmpx_write_direct(struct logininfo *li, struct utmpx *utx)
Kevin Stevesef4eea92001-02-05 12:42:17 +00001002{
Damien Miller6b0279c2004-09-12 15:25:17 +10001003 logit("%s: not implemented!", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001004 return (0);
andre61e67252000-06-04 17:07:49 +00001005}
Damien Millerdd47aa22000-06-27 11:18:27 +10001006# endif /* UTMPX_USE_LIBRARY */
andre2ff7b5d2000-06-03 14:57:40 +00001007
1008static int
andre61e67252000-06-04 17:07:49 +00001009utmpx_perform_login(struct logininfo *li)
1010{
andre2ff7b5d2000-06-03 14:57:40 +00001011 struct utmpx utx;
1012
1013 construct_utmpx(li, &utx);
Damien Millerdd47aa22000-06-27 11:18:27 +10001014# ifdef UTMPX_USE_LIBRARY
andre2ff7b5d2000-06-03 14:57:40 +00001015 if (!utmpx_write_library(li, &utx)) {
Damien Miller6b0279c2004-09-12 15:25:17 +10001016 logit("%s: utmp_write_library() failed", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001017 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001018 }
Damien Millerdd47aa22000-06-27 11:18:27 +10001019# else
andre2ff7b5d2000-06-03 14:57:40 +00001020 if (!utmpx_write_direct(li, &ut)) {
Damien Miller6b0279c2004-09-12 15:25:17 +10001021 logit("%s: utmp_write_direct() failed", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001022 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001023 }
Damien Millerdd47aa22000-06-27 11:18:27 +10001024# endif
Damien Miller8899ed32004-09-12 15:18:55 +10001025 return (1);
andre61e67252000-06-04 17:07:49 +00001026}
andre2ff7b5d2000-06-03 14:57:40 +00001027
1028
1029static int
andre61e67252000-06-04 17:07:49 +00001030utmpx_perform_logout(struct logininfo *li)
1031{
andre2ff7b5d2000-06-03 14:57:40 +00001032 struct utmpx utx;
1033
Tim Ricee06ae4a2002-02-24 17:56:46 -08001034 construct_utmpx(li, &utx);
Damien Millerdd47aa22000-06-27 11:18:27 +10001035# ifdef HAVE_ID_IN_UTMPX
andre2ff7b5d2000-06-03 14:57:40 +00001036 line_abbrevname(utx.ut_id, li->line, sizeof(utx.ut_id));
Damien Millerdd47aa22000-06-27 11:18:27 +10001037# endif
1038# ifdef HAVE_TYPE_IN_UTMPX
andre2ff7b5d2000-06-03 14:57:40 +00001039 utx.ut_type = DEAD_PROCESS;
Damien Millerdd47aa22000-06-27 11:18:27 +10001040# endif
andre2ff7b5d2000-06-03 14:57:40 +00001041
Damien Millerdd47aa22000-06-27 11:18:27 +10001042# ifdef UTMPX_USE_LIBRARY
andre2ff7b5d2000-06-03 14:57:40 +00001043 utmpx_write_library(li, &utx);
Damien Millerdd47aa22000-06-27 11:18:27 +10001044# else
andre2ff7b5d2000-06-03 14:57:40 +00001045 utmpx_write_direct(li, &utx);
Damien Millerdd47aa22000-06-27 11:18:27 +10001046# endif
Damien Miller8899ed32004-09-12 15:18:55 +10001047 return (1);
andre61e67252000-06-04 17:07:49 +00001048}
andre2ff7b5d2000-06-03 14:57:40 +00001049
andre2ff7b5d2000-06-03 14:57:40 +00001050int
andre61e67252000-06-04 17:07:49 +00001051utmpx_write_entry(struct logininfo *li)
1052{
andre2ff7b5d2000-06-03 14:57:40 +00001053 switch(li->type) {
1054 case LTYPE_LOGIN:
Damien Miller8899ed32004-09-12 15:18:55 +10001055 return (utmpx_perform_login(li));
andre2ff7b5d2000-06-03 14:57:40 +00001056 case LTYPE_LOGOUT:
Damien Miller8899ed32004-09-12 15:18:55 +10001057 return (utmpx_perform_logout(li));
andre2ff7b5d2000-06-03 14:57:40 +00001058 default:
Damien Miller6b0279c2004-09-12 15:25:17 +10001059 logit("%s: invalid type field", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001060 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001061 }
andre61e67252000-06-04 17:07:49 +00001062}
Damien Millerdd47aa22000-06-27 11:18:27 +10001063#endif /* USE_UTMPX */
andre2ff7b5d2000-06-03 14:57:40 +00001064
1065
1066/**
andre61e67252000-06-04 17:07:49 +00001067 ** Low-level wtmp functions
andre2ff7b5d2000-06-03 14:57:40 +00001068 **/
1069
Kevin Stevesef4eea92001-02-05 12:42:17 +00001070#ifdef USE_WTMP
andre2ff7b5d2000-06-03 14:57:40 +00001071
Damien Miller94cf4c82005-07-17 17:04:47 +10001072/*
Damien Miller8899ed32004-09-12 15:18:55 +10001073 * Write a wtmp entry direct to the end of the file
1074 * This is a slight modification of code in OpenBSD's logwtmp.c
1075 */
andre2ff7b5d2000-06-03 14:57:40 +00001076static int
andre61e67252000-06-04 17:07:49 +00001077wtmp_write(struct logininfo *li, struct utmp *ut)
1078{
andre2ff7b5d2000-06-03 14:57:40 +00001079 struct stat buf;
1080 int fd, ret = 1;
1081
1082 if ((fd = open(WTMP_FILE, O_WRONLY|O_APPEND, 0)) < 0) {
Damien Miller6b0279c2004-09-12 15:25:17 +10001083 logit("%s: problem writing %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001084 WTMP_FILE, strerror(errno));
Damien Miller8899ed32004-09-12 15:18:55 +10001085 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001086 }
Kevin Stevesef4eea92001-02-05 12:42:17 +00001087 if (fstat(fd, &buf) == 0)
Darren Tucker8661b562003-07-06 15:20:46 +10001088 if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) {
andre2ff7b5d2000-06-03 14:57:40 +00001089 ftruncate(fd, buf.st_size);
Damien Miller6b0279c2004-09-12 15:25:17 +10001090 logit("%s: problem writing %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001091 WTMP_FILE, strerror(errno));
1092 ret = 0;
1093 }
Damien Miller8899ed32004-09-12 15:18:55 +10001094 close(fd);
1095 return (ret);
andre61e67252000-06-04 17:07:49 +00001096}
andre2ff7b5d2000-06-03 14:57:40 +00001097
andre2ff7b5d2000-06-03 14:57:40 +00001098static int
Damien Millerdd47aa22000-06-27 11:18:27 +10001099wtmp_perform_login(struct logininfo *li)
1100{
andre2ff7b5d2000-06-03 14:57:40 +00001101 struct utmp ut;
1102
1103 construct_utmp(li, &ut);
Damien Miller8899ed32004-09-12 15:18:55 +10001104 return (wtmp_write(li, &ut));
andre61e67252000-06-04 17:07:49 +00001105}
andre2ff7b5d2000-06-03 14:57:40 +00001106
1107
1108static int
andre61e67252000-06-04 17:07:49 +00001109wtmp_perform_logout(struct logininfo *li)
1110{
andre2ff7b5d2000-06-03 14:57:40 +00001111 struct utmp ut;
1112
1113 construct_utmp(li, &ut);
Damien Miller8899ed32004-09-12 15:18:55 +10001114 return (wtmp_write(li, &ut));
andre61e67252000-06-04 17:07:49 +00001115}
andre2ff7b5d2000-06-03 14:57:40 +00001116
1117
1118int
andre61e67252000-06-04 17:07:49 +00001119wtmp_write_entry(struct logininfo *li)
1120{
andre2ff7b5d2000-06-03 14:57:40 +00001121 switch(li->type) {
1122 case LTYPE_LOGIN:
Damien Miller8899ed32004-09-12 15:18:55 +10001123 return (wtmp_perform_login(li));
andre2ff7b5d2000-06-03 14:57:40 +00001124 case LTYPE_LOGOUT:
Damien Miller8899ed32004-09-12 15:18:55 +10001125 return (wtmp_perform_logout(li));
andre2ff7b5d2000-06-03 14:57:40 +00001126 default:
Damien Miller6b0279c2004-09-12 15:25:17 +10001127 logit("%s: invalid type field", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001128 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001129 }
andre61e67252000-06-04 17:07:49 +00001130}
andre2ff7b5d2000-06-03 14:57:40 +00001131
1132
Damien Miller94cf4c82005-07-17 17:04:47 +10001133/*
Damien Miller8899ed32004-09-12 15:18:55 +10001134 * Notes on fetching login data from wtmp/wtmpx
Kevin Stevesef4eea92001-02-05 12:42:17 +00001135 *
andre6bb92372000-06-19 08:20:03 +00001136 * Logouts are usually recorded with (amongst other things) a blank
1137 * username on a given tty line. However, some systems (HP-UX is one)
1138 * leave all fields set, but change the ut_type field to DEAD_PROCESS.
1139 *
1140 * Since we're only looking for logins here, we know that the username
1141 * must be set correctly. On systems that leave it in, we check for
1142 * ut_type==USER_PROCESS (indicating a login.)
1143 *
1144 * Portability: Some systems may set something other than USER_PROCESS
1145 * to indicate a login process. I don't know of any as I write. Also,
1146 * it's possible that some systems may both leave the username in
1147 * place and not have ut_type.
1148 */
1149
andre6bb92372000-06-19 08:20:03 +00001150/* return true if this wtmp entry indicates a login */
1151static int
1152wtmp_islogin(struct logininfo *li, struct utmp *ut)
1153{
Kevin Stevesef4eea92001-02-05 12:42:17 +00001154 if (strncmp(li->username, ut->ut_name,
Damien Miller8899ed32004-09-12 15:18:55 +10001155 MIN_SIZEOF(li->username, ut->ut_name)) == 0) {
Damien Millerdd47aa22000-06-27 11:18:27 +10001156# ifdef HAVE_TYPE_IN_UTMP
andre6bb92372000-06-19 08:20:03 +00001157 if (ut->ut_type & USER_PROCESS)
Damien Miller8899ed32004-09-12 15:18:55 +10001158 return (1);
Damien Millerdd47aa22000-06-27 11:18:27 +10001159# else
Damien Miller8899ed32004-09-12 15:18:55 +10001160 return (1);
Damien Millerdd47aa22000-06-27 11:18:27 +10001161# endif
andre6bb92372000-06-19 08:20:03 +00001162 }
Damien Miller8899ed32004-09-12 15:18:55 +10001163 return (0);
andre6bb92372000-06-19 08:20:03 +00001164}
1165
andre2ff7b5d2000-06-03 14:57:40 +00001166int
andre61e67252000-06-04 17:07:49 +00001167wtmp_get_entry(struct logininfo *li)
1168{
andre2ff7b5d2000-06-03 14:57:40 +00001169 struct stat st;
1170 struct utmp ut;
Damien Miller8899ed32004-09-12 15:18:55 +10001171 int fd, found = 0;
andre6bb92372000-06-19 08:20:03 +00001172
1173 /* Clear the time entries in our logininfo */
1174 li->tv_sec = li->tv_usec = 0;
andre2ff7b5d2000-06-03 14:57:40 +00001175
1176 if ((fd = open(WTMP_FILE, O_RDONLY)) < 0) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001177 logit("%s: problem opening %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001178 WTMP_FILE, strerror(errno));
Damien Miller8899ed32004-09-12 15:18:55 +10001179 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001180 }
Kevin Stevesef4eea92001-02-05 12:42:17 +00001181 if (fstat(fd, &st) != 0) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001182 logit("%s: couldn't stat %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001183 WTMP_FILE, strerror(errno));
1184 close(fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001185 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001186 }
andre2ff7b5d2000-06-03 14:57:40 +00001187
andre6bb92372000-06-19 08:20:03 +00001188 /* Seek to the start of the last struct utmp */
Kevin Steves52172652001-10-02 00:29:00 +00001189 if (lseek(fd, -(off_t)sizeof(struct utmp), SEEK_END) == -1) {
andre6bb92372000-06-19 08:20:03 +00001190 /* Looks like we've got a fresh wtmp file */
1191 close(fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001192 return (0);
andre6bb92372000-06-19 08:20:03 +00001193 }
1194
1195 while (!found) {
Damien Miller53c5d462000-06-28 00:50:50 +10001196 if (atomicio(read, fd, &ut, sizeof(ut)) != sizeof(ut)) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001197 logit("%s: read of %s failed: %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 }
andre6bb92372000-06-19 08:20:03 +00001202 if ( wtmp_islogin(li, &ut) ) {
1203 found = 1;
Damien Miller8899ed32004-09-12 15:18:55 +10001204 /*
1205 * We've already checked for a time in struct
1206 * utmp, in login_getlast()
1207 */
Damien Millerdd47aa22000-06-27 11:18:27 +10001208# ifdef HAVE_TIME_IN_UTMP
andre2ff7b5d2000-06-03 14:57:40 +00001209 li->tv_sec = ut.ut_time;
Damien Millerdd47aa22000-06-27 11:18:27 +10001210# else
andre2ff7b5d2000-06-03 14:57:40 +00001211# if HAVE_TV_IN_UTMP
1212 li->tv_sec = ut.ut_tv.tv_sec;
1213# endif
Damien Millerdd47aa22000-06-27 11:18:27 +10001214# endif
andre6bb92372000-06-19 08:20:03 +00001215 line_fullname(li->line, ut.ut_line,
Damien Miller8899ed32004-09-12 15:18:55 +10001216 MIN_SIZEOF(li->line, ut.ut_line));
Damien Millerdd47aa22000-06-27 11:18:27 +10001217# ifdef HAVE_HOST_IN_UTMP
andre6bb92372000-06-19 08:20:03 +00001218 strlcpy(li->hostname, ut.ut_host,
Damien Miller8899ed32004-09-12 15:18:55 +10001219 MIN_SIZEOF(li->hostname, ut.ut_host));
Damien Millerdd47aa22000-06-27 11:18:27 +10001220# endif
andre6bb92372000-06-19 08:20:03 +00001221 continue;
andre2ff7b5d2000-06-03 14:57:40 +00001222 }
andre6bb92372000-06-19 08:20:03 +00001223 /* Seek back 2 x struct utmp */
Kevin Steves52172652001-10-02 00:29:00 +00001224 if (lseek(fd, -(off_t)(2 * sizeof(struct utmp)), SEEK_CUR) == -1) {
andre6bb92372000-06-19 08:20:03 +00001225 /* We've found the start of the file, so quit */
Damien Miller8899ed32004-09-12 15:18:55 +10001226 close(fd);
1227 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001228 }
andre6bb92372000-06-19 08:20:03 +00001229 }
1230
1231 /* We found an entry. Tidy up and return */
1232 close(fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001233 return (1);
andre61e67252000-06-04 17:07:49 +00001234}
Damien Millerdd47aa22000-06-27 11:18:27 +10001235# endif /* USE_WTMP */
andre2ff7b5d2000-06-03 14:57:40 +00001236
1237
1238/**
andre61e67252000-06-04 17:07:49 +00001239 ** Low-level wtmpx functions
andre2ff7b5d2000-06-03 14:57:40 +00001240 **/
1241
1242#ifdef USE_WTMPX
Damien Miller8899ed32004-09-12 15:18:55 +10001243/*
1244 * Write a wtmpx entry direct to the end of the file
1245 * This is a slight modification of code in OpenBSD's logwtmp.c
1246 */
andre2ff7b5d2000-06-03 14:57:40 +00001247static int
andre61e67252000-06-04 17:07:49 +00001248wtmpx_write(struct logininfo *li, struct utmpx *utx)
1249{
Darren Tuckerc28b88a2004-02-10 16:49:35 +11001250#ifndef HAVE_UPDWTMPX
andre2ff7b5d2000-06-03 14:57:40 +00001251 struct stat buf;
1252 int fd, ret = 1;
1253
1254 if ((fd = open(WTMPX_FILE, O_WRONLY|O_APPEND, 0)) < 0) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001255 logit("%s: problem opening %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001256 WTMPX_FILE, strerror(errno));
Damien Miller8899ed32004-09-12 15:18:55 +10001257 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001258 }
1259
Kevin Stevesef4eea92001-02-05 12:42:17 +00001260 if (fstat(fd, &buf) == 0)
Darren Tucker8661b562003-07-06 15:20:46 +10001261 if (atomicio(vwrite, fd, utx, sizeof(*utx)) != sizeof(*utx)) {
andre2ff7b5d2000-06-03 14:57:40 +00001262 ftruncate(fd, buf.st_size);
Damien Miller6b0279c2004-09-12 15:25:17 +10001263 logit("%s: problem writing %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001264 WTMPX_FILE, strerror(errno));
1265 ret = 0;
1266 }
Damien Miller8899ed32004-09-12 15:18:55 +10001267 close(fd);
andre2ff7b5d2000-06-03 14:57:40 +00001268
Damien Miller8899ed32004-09-12 15:18:55 +10001269 return (ret);
Darren Tuckerc28b88a2004-02-10 16:49:35 +11001270#else
1271 updwtmpx(WTMPX_FILE, utx);
Damien Miller8899ed32004-09-12 15:18:55 +10001272 return (1);
Darren Tuckerc28b88a2004-02-10 16:49:35 +11001273#endif
andre61e67252000-06-04 17:07:49 +00001274}
andre2ff7b5d2000-06-03 14:57:40 +00001275
1276
1277static int
andre61e67252000-06-04 17:07:49 +00001278wtmpx_perform_login(struct logininfo *li)
1279{
andre2ff7b5d2000-06-03 14:57:40 +00001280 struct utmpx utx;
1281
1282 construct_utmpx(li, &utx);
Damien Miller8899ed32004-09-12 15:18:55 +10001283 return (wtmpx_write(li, &utx));
andre61e67252000-06-04 17:07:49 +00001284}
andre2ff7b5d2000-06-03 14:57:40 +00001285
1286
1287static int
andre61e67252000-06-04 17:07:49 +00001288wtmpx_perform_logout(struct logininfo *li)
1289{
andre2ff7b5d2000-06-03 14:57:40 +00001290 struct utmpx utx;
1291
1292 construct_utmpx(li, &utx);
Damien Miller8899ed32004-09-12 15:18:55 +10001293 return (wtmpx_write(li, &utx));
andre61e67252000-06-04 17:07:49 +00001294}
andre2ff7b5d2000-06-03 14:57:40 +00001295
1296
1297int
andre61e67252000-06-04 17:07:49 +00001298wtmpx_write_entry(struct logininfo *li)
1299{
andre2ff7b5d2000-06-03 14:57:40 +00001300 switch(li->type) {
1301 case LTYPE_LOGIN:
Damien Miller8899ed32004-09-12 15:18:55 +10001302 return (wtmpx_perform_login(li));
andre2ff7b5d2000-06-03 14:57:40 +00001303 case LTYPE_LOGOUT:
Damien Miller8899ed32004-09-12 15:18:55 +10001304 return (wtmpx_perform_logout(li));
andre2ff7b5d2000-06-03 14:57:40 +00001305 default:
Damien Miller6b0279c2004-09-12 15:25:17 +10001306 logit("%s: invalid type field", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001307 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001308 }
andre61e67252000-06-04 17:07:49 +00001309}
andre2ff7b5d2000-06-03 14:57:40 +00001310
andre6bb92372000-06-19 08:20:03 +00001311/* Please see the notes above wtmp_islogin() for information about the
1312 next two functions */
1313
1314/* Return true if this wtmpx entry indicates a login */
1315static int
1316wtmpx_islogin(struct logininfo *li, struct utmpx *utx)
1317{
Damien Miller8899ed32004-09-12 15:18:55 +10001318 if (strncmp(li->username, utx->ut_name,
1319 MIN_SIZEOF(li->username, utx->ut_name)) == 0 ) {
Damien Millerdd47aa22000-06-27 11:18:27 +10001320# ifdef HAVE_TYPE_IN_UTMPX
andre6bb92372000-06-19 08:20:03 +00001321 if (utx->ut_type == USER_PROCESS)
Damien Miller8899ed32004-09-12 15:18:55 +10001322 return (1);
Damien Millerdd47aa22000-06-27 11:18:27 +10001323# else
Damien Miller8899ed32004-09-12 15:18:55 +10001324 return (1);
Damien Millerdd47aa22000-06-27 11:18:27 +10001325# endif
andre6bb92372000-06-19 08:20:03 +00001326 }
Damien Miller8899ed32004-09-12 15:18:55 +10001327 return (0);
andre6bb92372000-06-19 08:20:03 +00001328}
1329
andre2ff7b5d2000-06-03 14:57:40 +00001330
1331int
andre61e67252000-06-04 17:07:49 +00001332wtmpx_get_entry(struct logininfo *li)
1333{
andre2ff7b5d2000-06-03 14:57:40 +00001334 struct stat st;
1335 struct utmpx utx;
andre6bb92372000-06-19 08:20:03 +00001336 int fd, found=0;
1337
1338 /* Clear the time entries */
1339 li->tv_sec = li->tv_usec = 0;
andre2ff7b5d2000-06-03 14:57:40 +00001340
1341 if ((fd = open(WTMPX_FILE, O_RDONLY)) < 0) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001342 logit("%s: problem opening %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001343 WTMPX_FILE, strerror(errno));
Damien Miller8899ed32004-09-12 15:18:55 +10001344 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001345 }
Kevin Stevesef4eea92001-02-05 12:42:17 +00001346 if (fstat(fd, &st) != 0) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001347 logit("%s: couldn't stat %s: %s", __func__,
Tim Ricecdb82942002-07-14 15:33:20 -07001348 WTMPX_FILE, strerror(errno));
andre2ff7b5d2000-06-03 14:57:40 +00001349 close(fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001350 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001351 }
Kevin Stevesef4eea92001-02-05 12:42:17 +00001352
andre6bb92372000-06-19 08:20:03 +00001353 /* Seek to the start of the last struct utmpx */
Kevin Steves52172652001-10-02 00:29:00 +00001354 if (lseek(fd, -(off_t)sizeof(struct utmpx), SEEK_END) == -1 ) {
andre6bb92372000-06-19 08:20:03 +00001355 /* probably a newly rotated wtmpx file */
1356 close(fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001357 return (0);
andre6bb92372000-06-19 08:20:03 +00001358 }
andre2ff7b5d2000-06-03 14:57:40 +00001359
andre6bb92372000-06-19 08:20:03 +00001360 while (!found) {
Damien Miller53c5d462000-06-28 00:50:50 +10001361 if (atomicio(read, fd, &utx, sizeof(utx)) != sizeof(utx)) {
Damien Miller94cf4c82005-07-17 17:04:47 +10001362 logit("%s: read of %s failed: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001363 WTMPX_FILE, strerror(errno));
1364 close (fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001365 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001366 }
Damien Miller8899ed32004-09-12 15:18:55 +10001367 /*
Damien Miller94cf4c82005-07-17 17:04:47 +10001368 * Logouts are recorded as a blank username on a particular
Damien Miller8899ed32004-09-12 15:18:55 +10001369 * line. So, we just need to find the username in struct utmpx
1370 */
1371 if (wtmpx_islogin(li, &utx)) {
Tim Rice370e0ba2002-07-14 15:50:51 -07001372 found = 1;
Damien Miller8899ed32004-09-12 15:18:55 +10001373# if defined(HAVE_TV_IN_UTMPX)
andre2ff7b5d2000-06-03 14:57:40 +00001374 li->tv_sec = utx.ut_tv.tv_sec;
Damien Miller8899ed32004-09-12 15:18:55 +10001375# elif defined(HAVE_TIME_IN_UTMPX)
andre2ff7b5d2000-06-03 14:57:40 +00001376 li->tv_sec = utx.ut_time;
Damien Millerdd47aa22000-06-27 11:18:27 +10001377# endif
Damien Miller1a132252000-06-13 21:23:17 +10001378 line_fullname(li->line, utx.ut_line, sizeof(li->line));
Damien Miller8899ed32004-09-12 15:18:55 +10001379# if defined(HAVE_HOST_IN_UTMPX)
andre6bb92372000-06-19 08:20:03 +00001380 strlcpy(li->hostname, utx.ut_host,
Damien Miller8899ed32004-09-12 15:18:55 +10001381 MIN_SIZEOF(li->hostname, utx.ut_host));
Damien Millerdd47aa22000-06-27 11:18:27 +10001382# endif
andre6bb92372000-06-19 08:20:03 +00001383 continue;
andre2ff7b5d2000-06-03 14:57:40 +00001384 }
Kevin Steves52172652001-10-02 00:29:00 +00001385 if (lseek(fd, -(off_t)(2 * sizeof(struct utmpx)), SEEK_CUR) == -1) {
Damien Miller8899ed32004-09-12 15:18:55 +10001386 close(fd);
1387 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001388 }
andre6bb92372000-06-19 08:20:03 +00001389 }
1390
1391 close(fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001392 return (1);
andre61e67252000-06-04 17:07:49 +00001393}
Damien Millerd5bf3072000-06-07 21:32:13 +10001394#endif /* USE_WTMPX */
andre2ff7b5d2000-06-03 14:57:40 +00001395
andre2ff7b5d2000-06-03 14:57:40 +00001396/**
andre61e67252000-06-04 17:07:49 +00001397 ** Low-level libutil login() functions
andre2ff7b5d2000-06-03 14:57:40 +00001398 **/
1399
1400#ifdef USE_LOGIN
andre2ff7b5d2000-06-03 14:57:40 +00001401static int
andre61e67252000-06-04 17:07:49 +00001402syslogin_perform_login(struct logininfo *li)
1403{
andre2ff7b5d2000-06-03 14:57:40 +00001404 struct utmp *ut;
1405
Damien Millerb0aae332004-09-12 15:26:00 +10001406 ut = xmalloc(sizeof(*ut));
andre2ff7b5d2000-06-03 14:57:40 +00001407 construct_utmp(li, ut);
1408 login(ut);
Damien Millerf211efc2003-03-10 11:23:06 +11001409 free(ut);
andre2ff7b5d2000-06-03 14:57:40 +00001410
Damien Miller8899ed32004-09-12 15:18:55 +10001411 return (1);
andre61e67252000-06-04 17:07:49 +00001412}
1413
andre2ff7b5d2000-06-03 14:57:40 +00001414static int
andre61e67252000-06-04 17:07:49 +00001415syslogin_perform_logout(struct logininfo *li)
1416{
Damien Millerdd47aa22000-06-27 11:18:27 +10001417# ifdef HAVE_LOGOUT
Darren Tucker4d2f3612004-04-08 10:57:05 +10001418 char line[UT_LINESIZE];
Kevin Stevesef4eea92001-02-05 12:42:17 +00001419
andre2ff7b5d2000-06-03 14:57:40 +00001420 (void)line_stripname(line, li->line, sizeof(line));
1421
Damien Miller8899ed32004-09-12 15:18:55 +10001422 if (!logout(line))
Damien Miller6b0279c2004-09-12 15:25:17 +10001423 logit("%s: logout() returned an error", __func__);
Damien Millerdd47aa22000-06-27 11:18:27 +10001424# ifdef HAVE_LOGWTMP
Damien Miller8899ed32004-09-12 15:18:55 +10001425 else
andre2ff7b5d2000-06-03 14:57:40 +00001426 logwtmp(line, "", "");
Damien Millerdd47aa22000-06-27 11:18:27 +10001427# endif
andre6bb92372000-06-19 08:20:03 +00001428 /* FIXME: (ATL - if the need arises) What to do if we have
1429 * login, but no logout? what if logout but no logwtmp? All
1430 * routines are in libutil so they should all be there,
1431 * but... */
Damien Millerdd47aa22000-06-27 11:18:27 +10001432# endif
Damien Miller8899ed32004-09-12 15:18:55 +10001433 return (1);
andre61e67252000-06-04 17:07:49 +00001434}
andre2ff7b5d2000-06-03 14:57:40 +00001435
andre2ff7b5d2000-06-03 14:57:40 +00001436int
andre61e67252000-06-04 17:07:49 +00001437syslogin_write_entry(struct logininfo *li)
1438{
andre2ff7b5d2000-06-03 14:57:40 +00001439 switch (li->type) {
1440 case LTYPE_LOGIN:
Damien Miller8899ed32004-09-12 15:18:55 +10001441 return (syslogin_perform_login(li));
andre2ff7b5d2000-06-03 14:57:40 +00001442 case LTYPE_LOGOUT:
Damien Miller8899ed32004-09-12 15:18:55 +10001443 return (syslogin_perform_logout(li));
andre2ff7b5d2000-06-03 14:57:40 +00001444 default:
Damien Miller6b0279c2004-09-12 15:25:17 +10001445 logit("%s: Invalid type field", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001446 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001447 }
andre61e67252000-06-04 17:07:49 +00001448}
Damien Millerd5bf3072000-06-07 21:32:13 +10001449#endif /* USE_LOGIN */
andre2ff7b5d2000-06-03 14:57:40 +00001450
1451/* end of file log-syslogin.c */
1452
andre2ff7b5d2000-06-03 14:57:40 +00001453/**
andre61e67252000-06-04 17:07:49 +00001454 ** Low-level lastlog functions
andre2ff7b5d2000-06-03 14:57:40 +00001455 **/
1456
1457#ifdef USE_LASTLOG
Damien Millerdd47aa22000-06-27 11:18:27 +10001458#define LL_FILE 1
1459#define LL_DIR 2
1460#define LL_OTHER 3
andre2ff7b5d2000-06-03 14:57:40 +00001461
andre2ff7b5d2000-06-03 14:57:40 +00001462static void
andre61e67252000-06-04 17:07:49 +00001463lastlog_construct(struct logininfo *li, struct lastlog *last)
1464{
andre2ff7b5d2000-06-03 14:57:40 +00001465 /* clear the structure */
Damien Miller348c9b72000-08-15 10:01:22 +10001466 memset(last, '\0', sizeof(*last));
Kevin Stevesef4eea92001-02-05 12:42:17 +00001467
Damien Miller8899ed32004-09-12 15:18:55 +10001468 line_stripname(last->ll_line, li->line, sizeof(last->ll_line));
andre6bb92372000-06-19 08:20:03 +00001469 strlcpy(last->ll_host, li->hostname,
1470 MIN_SIZEOF(last->ll_host, li->hostname));
andre2ff7b5d2000-06-03 14:57:40 +00001471 last->ll_time = li->tv_sec;
andre61e67252000-06-04 17:07:49 +00001472}
andre2ff7b5d2000-06-03 14:57:40 +00001473
andre2ff7b5d2000-06-03 14:57:40 +00001474static int
andre61e67252000-06-04 17:07:49 +00001475lastlog_filetype(char *filename)
1476{
andre2ff7b5d2000-06-03 14:57:40 +00001477 struct stat st;
1478
Damien Millerdd47aa22000-06-27 11:18:27 +10001479 if (stat(LASTLOG_FILE, &st) != 0) {
Damien Miller6b0279c2004-09-12 15:25:17 +10001480 logit("%s: Couldn't stat %s: %s", __func__,
Damien Miller8899ed32004-09-12 15:18:55 +10001481 LASTLOG_FILE, strerror(errno));
1482 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001483 }
andre2ff7b5d2000-06-03 14:57:40 +00001484 if (S_ISDIR(st.st_mode))
Damien Miller8899ed32004-09-12 15:18:55 +10001485 return (LL_DIR);
andre2ff7b5d2000-06-03 14:57:40 +00001486 else if (S_ISREG(st.st_mode))
Damien Miller8899ed32004-09-12 15:18:55 +10001487 return (LL_FILE);
andre2ff7b5d2000-06-03 14:57:40 +00001488 else
Damien Miller8899ed32004-09-12 15:18:55 +10001489 return (LL_OTHER);
andre61e67252000-06-04 17:07:49 +00001490}
andre2ff7b5d2000-06-03 14:57:40 +00001491
1492
1493/* open the file (using filemode) and seek to the login entry */
1494static int
andre61e67252000-06-04 17:07:49 +00001495lastlog_openseek(struct logininfo *li, int *fd, int filemode)
1496{
andre2ff7b5d2000-06-03 14:57:40 +00001497 off_t offset;
1498 int type;
1499 char lastlog_file[1024];
1500
1501 type = lastlog_filetype(LASTLOG_FILE);
1502 switch (type) {
Damien Miller8899ed32004-09-12 15:18:55 +10001503 case LL_FILE:
1504 strlcpy(lastlog_file, LASTLOG_FILE,
1505 sizeof(lastlog_file));
1506 break;
1507 case LL_DIR:
1508 snprintf(lastlog_file, sizeof(lastlog_file), "%s/%s",
1509 LASTLOG_FILE, li->username);
1510 break;
1511 default:
Damien Miller6b0279c2004-09-12 15:25:17 +10001512 logit("%s: %.100s is not a file or directory!", __func__,
Damien Miller8899ed32004-09-12 15:18:55 +10001513 LASTLOG_FILE);
1514 return (0);
Damien Millerdd47aa22000-06-27 11:18:27 +10001515 }
andre2ff7b5d2000-06-03 14:57:40 +00001516
Damien Miller405dc602003-04-09 21:12:52 +10001517 *fd = open(lastlog_file, filemode, 0600);
Damien Miller8899ed32004-09-12 15:18:55 +10001518 if (*fd < 0) {
Damien Miller6b0279c2004-09-12 15:25:17 +10001519 debug("%s: Couldn't open %s: %s", __func__,
andre2ff7b5d2000-06-03 14:57:40 +00001520 lastlog_file, strerror(errno));
Damien Miller8899ed32004-09-12 15:18:55 +10001521 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001522 }
Kevin Stevesef4eea92001-02-05 12:42:17 +00001523
Damien Millere477ef62000-08-15 10:21:17 +10001524 if (type == LL_FILE) {
1525 /* find this uid's offset in the lastlog file */
Kevin Steves52172652001-10-02 00:29:00 +00001526 offset = (off_t) ((long)li->uid * sizeof(struct lastlog));
andre2ff7b5d2000-06-03 14:57:40 +00001527
Damien Miller8899ed32004-09-12 15:18:55 +10001528 if (lseek(*fd, offset, SEEK_SET) != offset) {
Damien Miller6b0279c2004-09-12 15:25:17 +10001529 logit("%s: %s->lseek(): %s", __func__,
1530 lastlog_file, strerror(errno));
Damien Miller8899ed32004-09-12 15:18:55 +10001531 return (0);
Damien Millere477ef62000-08-15 10:21:17 +10001532 }
andre2ff7b5d2000-06-03 14:57:40 +00001533 }
Kevin Stevesef4eea92001-02-05 12:42:17 +00001534
Damien Miller8899ed32004-09-12 15:18:55 +10001535 return (1);
andre61e67252000-06-04 17:07:49 +00001536}
andre2ff7b5d2000-06-03 14:57:40 +00001537
1538static int
andre61e67252000-06-04 17:07:49 +00001539lastlog_perform_login(struct logininfo *li)
1540{
andre2ff7b5d2000-06-03 14:57:40 +00001541 struct lastlog last;
1542 int fd;
1543
1544 /* create our struct lastlog */
1545 lastlog_construct(li, &last);
1546
Damien Miller405dc602003-04-09 21:12:52 +10001547 if (!lastlog_openseek(li, &fd, O_RDWR|O_CREAT))
Damien Miller8899ed32004-09-12 15:18:55 +10001548 return (0);
Kevin Stevesef4eea92001-02-05 12:42:17 +00001549
andre2ff7b5d2000-06-03 14:57:40 +00001550 /* write the entry */
Darren Tucker8661b562003-07-06 15:20:46 +10001551 if (atomicio(vwrite, fd, &last, sizeof(last)) != sizeof(last)) {
Damien Millerc1132e72000-08-18 14:08:38 +10001552 close(fd);
Damien Miller6b0279c2004-09-12 15:25:17 +10001553 logit("%s: Error writing to %s: %s", __func__,
Damien Millerc1132e72000-08-18 14:08:38 +10001554 LASTLOG_FILE, strerror(errno));
Damien Miller8899ed32004-09-12 15:18:55 +10001555 return (0);
Damien Millerdd47aa22000-06-27 11:18:27 +10001556 }
Damien Millerc1132e72000-08-18 14:08:38 +10001557
1558 close(fd);
Damien Miller8899ed32004-09-12 15:18:55 +10001559 return (1);
andre61e67252000-06-04 17:07:49 +00001560}
andre2ff7b5d2000-06-03 14:57:40 +00001561
andre2ff7b5d2000-06-03 14:57:40 +00001562int
andre61e67252000-06-04 17:07:49 +00001563lastlog_write_entry(struct logininfo *li)
1564{
andre2ff7b5d2000-06-03 14:57:40 +00001565 switch(li->type) {
1566 case LTYPE_LOGIN:
Damien Miller8899ed32004-09-12 15:18:55 +10001567 return (lastlog_perform_login(li));
andre2ff7b5d2000-06-03 14:57:40 +00001568 default:
Damien Miller6b0279c2004-09-12 15:25:17 +10001569 logit("%s: Invalid type field", __func__);
Damien Miller8899ed32004-09-12 15:18:55 +10001570 return (0);
andre2ff7b5d2000-06-03 14:57:40 +00001571 }
andre61e67252000-06-04 17:07:49 +00001572}
andre2ff7b5d2000-06-03 14:57:40 +00001573
andre2ff7b5d2000-06-03 14:57:40 +00001574static void
andre61e67252000-06-04 17:07:49 +00001575lastlog_populate_entry(struct logininfo *li, struct lastlog *last)
1576{
andre2ff7b5d2000-06-03 14:57:40 +00001577 line_fullname(li->line, last->ll_line, sizeof(li->line));
Kevin Stevesef4eea92001-02-05 12:42:17 +00001578 strlcpy(li->hostname, last->ll_host,
Damien Miller8899ed32004-09-12 15:18:55 +10001579 MIN_SIZEOF(li->hostname, last->ll_host));
andre2ff7b5d2000-06-03 14:57:40 +00001580 li->tv_sec = last->ll_time;
andre61e67252000-06-04 17:07:49 +00001581}
andre2ff7b5d2000-06-03 14:57:40 +00001582
andre2ff7b5d2000-06-03 14:57:40 +00001583int
andre61e67252000-06-04 17:07:49 +00001584lastlog_get_entry(struct logininfo *li)
1585{
andre2ff7b5d2000-06-03 14:57:40 +00001586 struct lastlog last;
Damien Miller7df881d2003-01-07 16:46:58 +11001587 int fd, ret;
andre2ff7b5d2000-06-03 14:57:40 +00001588
Damien Miller3a8a5cd2001-10-22 16:49:22 +10001589 if (!lastlog_openseek(li, &fd, O_RDONLY))
Damien Miller7df881d2003-01-07 16:46:58 +11001590 return (0);
Damien Miller3a8a5cd2001-10-22 16:49:22 +10001591
Damien Miller7df881d2003-01-07 16:46:58 +11001592 ret = atomicio(read, fd, &last, sizeof(last));
Damien Miller3a8a5cd2001-10-22 16:49:22 +10001593 close(fd);
1594
Damien Miller7df881d2003-01-07 16:46:58 +11001595 switch (ret) {
1596 case 0:
1597 memset(&last, '\0', sizeof(last));
1598 /* FALLTHRU */
1599 case sizeof(last):
1600 lastlog_populate_entry(li, &last);
1601 return (1);
1602 case -1:
Damien Millera8e06ce2003-11-21 23:48:55 +11001603 error("%s: Error reading from %s: %s", __func__,
Damien Miller7df881d2003-01-07 16:46:58 +11001604 LASTLOG_FILE, strerror(errno));
1605 return (0);
1606 default:
1607 error("%s: Error reading from %s: Expecting %d, got %d",
Darren Tuckerefc17472005-11-22 19:55:13 +11001608 __func__, LASTLOG_FILE, (int)sizeof(last), ret);
Damien Miller7df881d2003-01-07 16:46:58 +11001609 return (0);
1610 }
Damien Miller3a8a5cd2001-10-22 16:49:22 +10001611
Damien Miller7df881d2003-01-07 16:46:58 +11001612 /* NOTREACHED */
1613 return (0);
andre61e67252000-06-04 17:07:49 +00001614}
Damien Millerd5bf3072000-06-07 21:32:13 +10001615#endif /* USE_LASTLOG */
Darren Tucker2fba9932005-02-02 23:30:24 +11001616
1617#ifdef USE_BTMP
1618 /*
1619 * Logs failed login attempts in _PATH_BTMP if that exists.
1620 * The most common login failure is to give password instead of username.
1621 * So the _PATH_BTMP file checked for the correct permission, so that
1622 * only root can read it.
1623 */
1624
1625void
1626record_failed_login(const char *username, const char *hostname,
1627 const char *ttyn)
1628{
1629 int fd;
1630 struct utmp ut;
1631 struct sockaddr_storage from;
Darren Tuckerefc17472005-11-22 19:55:13 +11001632 socklen_t fromlen = sizeof(from);
Darren Tucker2fba9932005-02-02 23:30:24 +11001633 struct sockaddr_in *a4;
1634 struct sockaddr_in6 *a6;
1635 time_t t;
1636 struct stat fst;
1637
1638 if (geteuid() != 0)
1639 return;
1640 if ((fd = open(_PATH_BTMP, O_WRONLY | O_APPEND)) < 0) {
1641 debug("Unable to open the btmp file %s: %s", _PATH_BTMP,
1642 strerror(errno));
1643 return;
1644 }
1645 if (fstat(fd, &fst) < 0) {
1646 logit("%s: fstat of %s failed: %s", __func__, _PATH_BTMP,
1647 strerror(errno));
1648 goto out;
1649 }
1650 if((fst.st_mode & (S_IRWXG | S_IRWXO)) || (fst.st_uid != 0)){
1651 logit("Excess permission or bad ownership on file %s",
1652 _PATH_BTMP);
1653 goto out;
1654 }
1655
1656 memset(&ut, 0, sizeof(ut));
1657 /* strncpy because we don't necessarily want nul termination */
1658 strncpy(ut.ut_user, username, sizeof(ut.ut_user));
1659 strlcpy(ut.ut_line, "ssh:notty", sizeof(ut.ut_line));
1660
1661 time(&t);
1662 ut.ut_time = t; /* ut_time is not always a time_t */
1663 ut.ut_type = LOGIN_PROCESS;
1664 ut.ut_pid = getpid();
1665
1666 /* strncpy because we don't necessarily want nul termination */
1667 strncpy(ut.ut_host, hostname, sizeof(ut.ut_host));
1668
1669 if (packet_connection_is_on_socket() &&
1670 getpeername(packet_get_connection_in(),
1671 (struct sockaddr *)&from, &fromlen) == 0) {
1672 ipv64_normalise_mapped(&from, &fromlen);
1673 if (from.ss_family == AF_INET) {
1674 a4 = (struct sockaddr_in *)&from;
1675 memcpy(&ut.ut_addr, &(a4->sin_addr),
1676 MIN_SIZEOF(ut.ut_addr, a4->sin_addr));
1677 }
1678#ifdef HAVE_ADDR_V6_IN_UTMP
1679 if (from.ss_family == AF_INET6) {
1680 a6 = (struct sockaddr_in6 *)&from;
1681 memcpy(&ut.ut_addr_v6, &(a6->sin6_addr),
1682 MIN_SIZEOF(ut.ut_addr_v6, a6->sin6_addr));
1683 }
1684#endif
1685 }
1686
1687 if (atomicio(vwrite, fd, &ut, sizeof(ut)) != sizeof(ut))
1688 error("Failed to write to %s: %s", _PATH_BTMP,
1689 strerror(errno));
1690
1691out:
1692 close(fd);
1693}
1694#endif /* USE_BTMP */