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1d7b9b20 | 1 | /* |
2 | * Copyright (c) 2000 Andre Lucas. All rights reserved. | |
564dd50a | 3 | * Portions copyright (c) 1998 Todd C. Miller |
4 | * Portions copyright (c) 1996 Jason Downs | |
5 | * Portions copyright (c) 1996 Theo de Raadt | |
1d7b9b20 | 6 | * |
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. | |
1d7b9b20 | 15 | * |
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 | ||
b6610e8f | 28 | /* |
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 | ||
2b87da3b | 49 | /** |
1d7b9b20 | 50 | ** loginrec.c: platform-independent login recording and lastlog retrieval |
51 | **/ | |
52 | ||
564dd50a | 53 | /* |
fa64c868 | 54 | * 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 | */ | |
1d7b9b20 | 147 | |
148 | #include "includes.h" | |
149 | ||
1d7b9b20 | 150 | #include "ssh.h" |
151 | #include "xmalloc.h" | |
152 | #include "loginrec.h" | |
42f11eb2 | 153 | #include "log.h" |
154 | #include "atomicio.h" | |
b6610e8f | 155 | #include "packet.h" |
156 | #include "canohost.h" | |
c00e4d75 | 157 | #include "auth.h" |
1d7b9b20 | 158 | |
44d5f7f7 | 159 | #ifdef HAVE_UTIL_H |
fa64c868 | 160 | # include <util.h> |
44d5f7f7 | 161 | #endif |
162 | ||
8f523d67 | 163 | #ifdef HAVE_LIBUTIL_H |
fa64c868 | 164 | # include <libutil.h> |
8f523d67 | 165 | #endif |
166 | ||
fa64c868 | 167 | RCSID("$Id$"); |
168 | ||
1d7b9b20 | 169 | /** |
170 | ** prototypes for helper functions in this file | |
171 | **/ | |
172 | ||
173 | #if HAVE_UTMP_H | |
1d7b9b20 | 174 | void set_utmp_time(struct logininfo *li, struct utmp *ut); |
175 | void construct_utmp(struct logininfo *li, struct utmp *ut); | |
176 | #endif | |
177 | ||
178 | #ifdef HAVE_UTMPX_H | |
1d7b9b20 | 179 | void set_utmpx_time(struct logininfo *li, struct utmpx *ut); |
180 | void construct_utmpx(struct logininfo *li, struct utmpx *ut); | |
181 | #endif | |
182 | ||
183 | int utmp_write_entry(struct logininfo *li); | |
184 | int utmpx_write_entry(struct logininfo *li); | |
185 | int wtmp_write_entry(struct logininfo *li); | |
186 | int wtmpx_write_entry(struct logininfo *li); | |
187 | int lastlog_write_entry(struct logininfo *li); | |
188 | int syslogin_write_entry(struct logininfo *li); | |
189 | ||
190 | int getlast_entry(struct logininfo *li); | |
191 | int lastlog_get_entry(struct logininfo *li); | |
192 | int wtmp_get_entry(struct logininfo *li); | |
193 | int wtmpx_get_entry(struct logininfo *li); | |
194 | ||
5abcdf8e | 195 | /* pick the shortest string */ |
fa64c868 | 196 | #define MIN_SIZEOF(s1,s2) (sizeof(s1) < sizeof(s2) ? sizeof(s1) : sizeof(s2)) |
5abcdf8e | 197 | |
1d7b9b20 | 198 | /** |
199 | ** platform-independent login functions | |
200 | **/ | |
201 | ||
fa64c868 | 202 | /* |
203 | * login_login(struct logininfo *) - Record a login | |
2b87da3b | 204 | * |
5abcdf8e | 205 | * Call with a pointer to a struct logininfo initialised with |
206 | * login_init_entry() or login_alloc_entry() | |
207 | * | |
208 | * Returns: | |
209 | * >0 if successful | |
210 | * 0 on failure (will use OpenSSH's logging facilities for diagnostics) | |
211 | */ | |
564dd50a | 212 | int |
fa64c868 | 213 | login_login(struct logininfo *li) |
564dd50a | 214 | { |
215 | li->type = LTYPE_LOGIN; | |
fa64c868 | 216 | return (login_write(li)); |
564dd50a | 217 | } |
1d7b9b20 | 218 | |
219 | ||
fa64c868 | 220 | /* |
221 | * login_logout(struct logininfo *) - Record a logout | |
5abcdf8e | 222 | * |
223 | * Call as with login_login() | |
224 | * | |
225 | * Returns: | |
226 | * >0 if successful | |
227 | * 0 on failure (will use OpenSSH's logging facilities for diagnostics) | |
228 | */ | |
564dd50a | 229 | int |
230 | login_logout(struct logininfo *li) | |
231 | { | |
232 | li->type = LTYPE_LOGOUT; | |
fa64c868 | 233 | return (login_write(li)); |
1d7b9b20 | 234 | } |
235 | ||
fa64c868 | 236 | /* |
237 | * login_get_lastlog_time(int) - Retrieve the last login time | |
5abcdf8e | 238 | * |
239 | * Retrieve the last login time for the given uid. Will try to use the | |
240 | * system lastlog facilities if they are available, but will fall back | |
241 | * to looking in wtmp/wtmpx if necessary | |
242 | * | |
243 | * Returns: | |
244 | * 0 on failure, or if user has never logged in | |
245 | * Time in seconds from the epoch if successful | |
246 | * | |
247 | * Useful preprocessor symbols: | |
248 | * DISABLE_LASTLOG: If set, *never* even try to retrieve lastlog | |
249 | * info | |
250 | * USE_LASTLOG: If set, indicates the presence of system lastlog | |
251 | * facilities. If this and DISABLE_LASTLOG are not set, | |
252 | * try to retrieve lastlog information from wtmp/wtmpx. | |
253 | */ | |
564dd50a | 254 | unsigned int |
255 | login_get_lastlog_time(const int uid) | |
256 | { | |
257 | struct logininfo li; | |
1d7b9b20 | 258 | |
5abcdf8e | 259 | if (login_get_lastlog(&li, uid)) |
fa64c868 | 260 | return (li.tv_sec); |
5abcdf8e | 261 | else |
fa64c868 | 262 | return (0); |
564dd50a | 263 | } |
1d7b9b20 | 264 | |
fa64c868 | 265 | /* |
266 | * login_get_lastlog(struct logininfo *, int) - Retrieve a lastlog entry | |
5abcdf8e | 267 | * |
268 | * Retrieve a logininfo structure populated (only partially) with | |
269 | * information from the system lastlog data, or from wtmp/wtmpx if no | |
270 | * system lastlog information exists. | |
271 | * | |
272 | * Note this routine must be given a pre-allocated logininfo. | |
273 | * | |
274 | * Returns: | |
275 | * >0: A pointer to your struct logininfo if successful | |
276 | * 0 on failure (will use OpenSSH's logging facilities for diagnostics) | |
5abcdf8e | 277 | */ |
564dd50a | 278 | struct logininfo * |
279 | login_get_lastlog(struct logininfo *li, const int uid) | |
280 | { | |
5abcdf8e | 281 | struct passwd *pw; |
5abcdf8e | 282 | |
dbaa2e87 | 283 | memset(li, '\0', sizeof(*li)); |
1d7b9b20 | 284 | li->uid = uid; |
5abcdf8e | 285 | |
2b87da3b | 286 | /* |
9f32ceb4 | 287 | * If we don't have a 'real' lastlog, we need the username to |
5abcdf8e | 288 | * reliably search wtmp(x) for the last login (see |
2b87da3b | 289 | * wtmp_get_entry().) |
9f32ceb4 | 290 | */ |
5abcdf8e | 291 | pw = getpwuid(uid); |
a05a70ab | 292 | if (pw == NULL) |
a233586b | 293 | fatal("%s: Cannot find account for uid %i", __func__, uid); |
2b87da3b | 294 | |
1bfbb762 | 295 | /* No MIN_SIZEOF here - we absolutely *must not* truncate the |
fa64c868 | 296 | * username (XXX - so check for trunc!) */ |
d8caae24 | 297 | strlcpy(li->username, pw->pw_name, sizeof(li->username)); |
a05a70ab | 298 | |
564dd50a | 299 | if (getlast_entry(li)) |
fa64c868 | 300 | return (li); |
564dd50a | 301 | else |
fa64c868 | 302 | return (NULL); |
1d7b9b20 | 303 | } |
304 | ||
1d7b9b20 | 305 | |
fa64c868 | 306 | /* |
307 | * login_alloc_entry(int, char*, char*, char*) - Allocate and initialise | |
2b87da3b | 308 | * a logininfo structure |
309 | * | |
5abcdf8e | 310 | * This function creates a new struct logininfo, a data structure |
311 | * meant to carry the information required to portably record login info. | |
312 | * | |
313 | * Returns a pointer to a newly created struct logininfo. If memory | |
314 | * allocation fails, the program halts. | |
315 | */ | |
564dd50a | 316 | struct |
317 | logininfo *login_alloc_entry(int pid, const char *username, | |
fa64c868 | 318 | const char *hostname, const char *line) |
564dd50a | 319 | { |
320 | struct logininfo *newli; | |
1d7b9b20 | 321 | |
fa64c868 | 322 | newli = xmalloc(sizeof(*newli)); |
323 | login_init_entry(newli, pid, username, hostname, line); | |
324 | return (newli); | |
1d7b9b20 | 325 | } |
326 | ||
327 | ||
5abcdf8e | 328 | /* login_free_entry(struct logininfo *) - free struct memory */ |
1d7b9b20 | 329 | void |
564dd50a | 330 | login_free_entry(struct logininfo *li) |
331 | { | |
332 | xfree(li); | |
1d7b9b20 | 333 | } |
334 | ||
335 | ||
5abcdf8e | 336 | /* login_init_entry(struct logininfo *, int, char*, char*, char*) |
337 | * - initialise a struct logininfo | |
2b87da3b | 338 | * |
5abcdf8e | 339 | * Populates a new struct logininfo, a data structure meant to carry |
340 | * the information required to portably record login info. | |
341 | * | |
342 | * Returns: 1 | |
343 | */ | |
564dd50a | 344 | int |
2b87da3b | 345 | login_init_entry(struct logininfo *li, int pid, const char *username, |
fa64c868 | 346 | const char *hostname, const char *line) |
564dd50a | 347 | { |
d8caae24 | 348 | struct passwd *pw; |
2b87da3b | 349 | |
dbaa2e87 | 350 | memset(li, 0, sizeof(*li)); |
2b87da3b | 351 | |
564dd50a | 352 | li->pid = pid; |
d8caae24 | 353 | |
564dd50a | 354 | /* set the line information */ |
355 | if (line) | |
356 | line_fullname(li->line, line, sizeof(li->line)); | |
1d7b9b20 | 357 | |
d8caae24 | 358 | if (username) { |
564dd50a | 359 | strlcpy(li->username, username, sizeof(li->username)); |
d8caae24 | 360 | pw = getpwnam(li->username); |
fa64c868 | 361 | if (pw == NULL) { |
a233586b | 362 | fatal("%s: Cannot find user \"%s\"", __func__, |
fa64c868 | 363 | li->username); |
364 | } | |
d8caae24 | 365 | li->uid = pw->pw_uid; |
366 | } | |
a05a70ab | 367 | |
564dd50a | 368 | if (hostname) |
369 | strlcpy(li->hostname, hostname, sizeof(li->hostname)); | |
d8caae24 | 370 | |
fa64c868 | 371 | return (1); |
1d7b9b20 | 372 | } |
373 | ||
fa64c868 | 374 | /* |
375 | * login_set_current_time(struct logininfo *) - set the current time | |
5abcdf8e | 376 | * |
377 | * Set the current time in a logininfo structure. This function is | |
378 | * meant to eliminate the need to deal with system dependencies for | |
379 | * time handling. | |
380 | */ | |
1d7b9b20 | 381 | void |
564dd50a | 382 | login_set_current_time(struct logininfo *li) |
383 | { | |
1d7b9b20 | 384 | struct timeval tv; |
385 | ||
386 | gettimeofday(&tv, NULL); | |
2b87da3b | 387 | |
d8caae24 | 388 | li->tv_sec = tv.tv_sec; |
389 | li->tv_usec = tv.tv_usec; | |
1d7b9b20 | 390 | } |
391 | ||
564dd50a | 392 | /* copy a sockaddr_* into our logininfo */ |
1d7b9b20 | 393 | void |
564dd50a | 394 | login_set_addr(struct logininfo *li, const struct sockaddr *sa, |
fa64c868 | 395 | const unsigned int sa_size) |
564dd50a | 396 | { |
397 | unsigned int bufsize = sa_size; | |
398 | ||
399 | /* make sure we don't overrun our union */ | |
400 | if (sizeof(li->hostaddr) < sa_size) | |
401 | bufsize = sizeof(li->hostaddr); | |
402 | ||
fa64c868 | 403 | memcpy(&li->hostaddr.sa, sa, bufsize); |
1d7b9b20 | 404 | } |
1d7b9b20 | 405 | |
564dd50a | 406 | |
407 | /** | |
408 | ** login_write: Call low-level recording functions based on autoconf | |
409 | ** results | |
410 | **/ | |
1d7b9b20 | 411 | int |
fa64c868 | 412 | login_write(struct logininfo *li) |
564dd50a | 413 | { |
3c62e7eb | 414 | #ifndef HAVE_CYGWIN |
fa64c868 | 415 | if (geteuid() != 0) { |
416 | logit("Attempt to write login records by non-root user (aborting)"); | |
417 | return (1); | |
1d7b9b20 | 418 | } |
3c62e7eb | 419 | #endif |
a05a70ab | 420 | |
1d7b9b20 | 421 | /* set the timestamp */ |
422 | login_set_current_time(li); | |
423 | #ifdef USE_LOGIN | |
424 | syslogin_write_entry(li); | |
425 | #endif | |
426 | #ifdef USE_LASTLOG | |
fa64c868 | 427 | if (li->type == LTYPE_LOGIN) |
1d7b9b20 | 428 | lastlog_write_entry(li); |
1d7b9b20 | 429 | #endif |
430 | #ifdef USE_UTMP | |
431 | utmp_write_entry(li); | |
432 | #endif | |
433 | #ifdef USE_WTMP | |
434 | wtmp_write_entry(li); | |
435 | #endif | |
436 | #ifdef USE_UTMPX | |
437 | utmpx_write_entry(li); | |
438 | #endif | |
439 | #ifdef USE_WTMPX | |
440 | wtmpx_write_entry(li); | |
f5ed3301 | 441 | #endif |
442 | #ifdef CUSTOM_SYS_AUTH_RECORD_LOGIN | |
443 | if (li->type == LTYPE_LOGIN && | |
444 | !sys_auth_record_login(li->username,li->hostname,li->line)) | |
445 | logit("Writing login record failed for %s", li->username); | |
c00e4d75 | 446 | #endif |
447 | #ifdef AUDIT_EVENTS | |
448 | if (li->type == LTYPE_LOGIN) | |
449 | audit_session_open(li->line); | |
450 | else if (li->type == LTYPE_LOGOUT) | |
451 | audit_session_close(li->line); | |
1d7b9b20 | 452 | #endif |
fa64c868 | 453 | return (0); |
1d7b9b20 | 454 | } |
455 | ||
7e2d5fa4 | 456 | #ifdef LOGIN_NEEDS_UTMPX |
457 | int | |
458 | login_utmp_only(struct logininfo *li) | |
459 | { | |
aff51935 | 460 | li->type = LTYPE_LOGIN; |
9e127e27 | 461 | login_set_current_time(li); |
7e2d5fa4 | 462 | # ifdef USE_UTMP |
463 | utmp_write_entry(li); | |
464 | # endif | |
465 | # ifdef USE_WTMP | |
466 | wtmp_write_entry(li); | |
467 | # endif | |
468 | # ifdef USE_UTMPX | |
469 | utmpx_write_entry(li); | |
470 | # endif | |
471 | # ifdef USE_WTMPX | |
472 | wtmpx_write_entry(li); | |
473 | # endif | |
fa64c868 | 474 | return (0); |
7e2d5fa4 | 475 | } |
476 | #endif | |
477 | ||
564dd50a | 478 | /** |
479 | ** getlast_entry: Call low-level functions to retrieve the last login | |
480 | ** time. | |
481 | **/ | |
1d7b9b20 | 482 | |
564dd50a | 483 | /* take the uid in li and return the last login time */ |
1d7b9b20 | 484 | int |
564dd50a | 485 | getlast_entry(struct logininfo *li) |
486 | { | |
487 | #ifdef USE_LASTLOG | |
9f32ceb4 | 488 | return(lastlog_get_entry(li)); |
a05a70ab | 489 | #else /* !USE_LASTLOG */ |
1d7b9b20 | 490 | |
fa64c868 | 491 | #if defined(DISABLE_LASTLOG) |
2b87da3b | 492 | /* On some systems we shouldn't even try to obtain last login |
3f45f1c3 | 493 | * time, e.g. AIX */ |
fa64c868 | 494 | return (0); |
495 | # elif defined(USE_WTMP) && \ | |
496 | (defined(HAVE_TIME_IN_UTMP) || defined(HAVE_TV_IN_UTMP)) | |
564dd50a | 497 | /* retrieve last login time from utmp */ |
a05a70ab | 498 | return (wtmp_get_entry(li)); |
fa64c868 | 499 | # elif defined(USE_WTMPX) && \ |
500 | (defined(HAVE_TIME_IN_UTMPX) || defined(HAVE_TV_IN_UTMPX)) | |
564dd50a | 501 | /* If wtmp isn't available, try wtmpx */ |
a05a70ab | 502 | return (wtmpx_get_entry(li)); |
fa64c868 | 503 | # else |
564dd50a | 504 | /* Give up: No means of retrieving last login time */ |
fa64c868 | 505 | return (0); |
2b87da3b | 506 | # endif /* DISABLE_LASTLOG */ |
a05a70ab | 507 | #endif /* USE_LASTLOG */ |
564dd50a | 508 | } |
1d7b9b20 | 509 | |
510 | ||
1d7b9b20 | 511 | |
512 | /* | |
564dd50a | 513 | * 'line' string utility functions |
514 | * | |
515 | * These functions process the 'line' string into one of three forms: | |
516 | * | |
1d7b9b20 | 517 | * 1. The full filename (including '/dev') |
518 | * 2. The stripped name (excluding '/dev') | |
564dd50a | 519 | * 3. The abbreviated name (e.g. /dev/ttyp00 -> yp00 |
520 | * /dev/pts/1 -> ts/1 ) | |
1d7b9b20 | 521 | * |
522 | * Form 3 is used on some systems to identify a .tmp.? entry when | |
523 | * attempting to remove it. Typically both addition and removal is | |
564dd50a | 524 | * performed by one application - say, sshd - so as long as the choice |
525 | * uniquely identifies a terminal it's ok. | |
1d7b9b20 | 526 | */ |
527 | ||
528 | ||
fa64c868 | 529 | /* |
530 | * line_fullname(): add the leading '/dev/' if it doesn't exist make | |
531 | * sure dst has enough space, if not just copy src (ugh) | |
532 | */ | |
1d7b9b20 | 533 | char * |
564dd50a | 534 | line_fullname(char *dst, const char *src, int dstsize) |
535 | { | |
1d7b9b20 | 536 | memset(dst, '\0', dstsize); |
fa64c868 | 537 | if ((strncmp(src, "/dev/", 5) == 0) || (dstsize < (strlen(src) + 5))) |
1d7b9b20 | 538 | strlcpy(dst, src, dstsize); |
fa64c868 | 539 | else { |
a4d05724 | 540 | strlcpy(dst, "/dev/", dstsize); |
1d7b9b20 | 541 | strlcat(dst, src, dstsize); |
542 | } | |
fa64c868 | 543 | return (dst); |
1d7b9b20 | 544 | } |
545 | ||
564dd50a | 546 | /* line_stripname(): strip the leading '/dev' if it exists, return dst */ |
1d7b9b20 | 547 | char * |
564dd50a | 548 | line_stripname(char *dst, const char *src, int dstsize) |
549 | { | |
1d7b9b20 | 550 | memset(dst, '\0', dstsize); |
551 | if (strncmp(src, "/dev/", 5) == 0) | |
89d7510a | 552 | strlcpy(dst, src + 5, dstsize); |
1d7b9b20 | 553 | else |
554 | strlcpy(dst, src, dstsize); | |
fa64c868 | 555 | return (dst); |
564dd50a | 556 | } |
557 | ||
fa64c868 | 558 | /* |
559 | * line_abbrevname(): Return the abbreviated (usually four-character) | |
564dd50a | 560 | * form of the line (Just use the last <dstsize> characters of the |
561 | * full name.) | |
562 | * | |
563 | * NOTE: use strncpy because we do NOT necessarily want zero | |
fa64c868 | 564 | * termination |
565 | */ | |
1d7b9b20 | 566 | char * |
2b87da3b | 567 | line_abbrevname(char *dst, const char *src, int dstsize) |
a05a70ab | 568 | { |
569 | size_t len; | |
2b87da3b | 570 | |
1d7b9b20 | 571 | memset(dst, '\0', dstsize); |
2b87da3b | 572 | |
daaff4d5 | 573 | /* Always skip prefix if present */ |
574 | if (strncmp(src, "/dev/", 5) == 0) | |
575 | src += 5; | |
2b87da3b | 576 | |
0e8f4eba | 577 | #ifdef WITH_ABBREV_NO_TTY |
578 | if (strncmp(src, "tty", 3) == 0) | |
579 | src += 3; | |
580 | #endif | |
581 | ||
a05a70ab | 582 | len = strlen(src); |
583 | ||
daaff4d5 | 584 | if (len > 0) { |
585 | if (((int)len - dstsize) > 0) | |
586 | src += ((int)len - dstsize); | |
587 | ||
588 | /* note: _don't_ change this to strlcpy */ | |
2b87da3b | 589 | strncpy(dst, src, (size_t)dstsize); |
a05a70ab | 590 | } |
2b87da3b | 591 | |
fa64c868 | 592 | return (dst); |
1d7b9b20 | 593 | } |
594 | ||
1d7b9b20 | 595 | /** |
596 | ** utmp utility functions | |
564dd50a | 597 | ** |
598 | ** These functions manipulate struct utmp, taking system differences | |
599 | ** into account. | |
1d7b9b20 | 600 | **/ |
601 | ||
602 | #if defined(USE_UTMP) || defined (USE_WTMP) || defined (USE_LOGIN) | |
603 | ||
1d7b9b20 | 604 | /* build the utmp structure */ |
605 | void | |
564dd50a | 606 | set_utmp_time(struct logininfo *li, struct utmp *ut) |
607 | { | |
fa64c868 | 608 | # if defined(HAVE_TV_IN_UTMP) |
1d7b9b20 | 609 | ut->ut_tv.tv_sec = li->tv_sec; |
610 | ut->ut_tv.tv_usec = li->tv_usec; | |
fa64c868 | 611 | # elif defined(HAVE_TIME_IN_UTMP) |
1d7b9b20 | 612 | ut->ut_time = li->tv_sec; |
a05a70ab | 613 | # endif |
1d7b9b20 | 614 | } |
615 | ||
616 | void | |
617 | construct_utmp(struct logininfo *li, | |
564dd50a | 618 | struct utmp *ut) |
619 | { | |
9746ee4b | 620 | # ifdef HAVE_ADDR_V6_IN_UTMP |
621 | struct sockaddr_in6 *sa6; | |
fa64c868 | 622 | # endif |
623 | ||
dbaa2e87 | 624 | memset(ut, '\0', sizeof(*ut)); |
5abcdf8e | 625 | |
626 | /* First fill out fields used for both logins and logouts */ | |
627 | ||
a05a70ab | 628 | # ifdef HAVE_ID_IN_UTMP |
1d7b9b20 | 629 | line_abbrevname(ut->ut_id, li->line, sizeof(ut->ut_id)); |
a05a70ab | 630 | # endif |
1d7b9b20 | 631 | |
a05a70ab | 632 | # ifdef HAVE_TYPE_IN_UTMP |
5abcdf8e | 633 | /* This is done here to keep utmp constants out of struct logininfo */ |
1d7b9b20 | 634 | switch (li->type) { |
635 | case LTYPE_LOGIN: | |
636 | ut->ut_type = USER_PROCESS; | |
ef51930f | 637 | #ifdef _UNICOS |
1a23ac2c | 638 | cray_set_tmpdir(ut); |
639 | #endif | |
1d7b9b20 | 640 | break; |
641 | case LTYPE_LOGOUT: | |
642 | ut->ut_type = DEAD_PROCESS; | |
ef51930f | 643 | #ifdef _UNICOS |
1a23ac2c | 644 | cray_retain_utmp(ut, li->pid); |
645 | #endif | |
1d7b9b20 | 646 | break; |
647 | } | |
a05a70ab | 648 | # endif |
5abcdf8e | 649 | set_utmp_time(li, ut); |
1d7b9b20 | 650 | |
5abcdf8e | 651 | line_stripname(ut->ut_line, li->line, sizeof(ut->ut_line)); |
a05a70ab | 652 | |
653 | # ifdef HAVE_PID_IN_UTMP | |
1d7b9b20 | 654 | ut->ut_pid = li->pid; |
a05a70ab | 655 | # endif |
5abcdf8e | 656 | |
657 | /* If we're logging out, leave all other fields blank */ | |
658 | if (li->type == LTYPE_LOGOUT) | |
fa64c868 | 659 | return; |
5abcdf8e | 660 | |
a05a70ab | 661 | /* |
662 | * These fields are only used when logging in, and are blank | |
2b87da3b | 663 | * for logouts. |
a05a70ab | 664 | */ |
5abcdf8e | 665 | |
666 | /* Use strncpy because we don't necessarily want null termination */ | |
fa64c868 | 667 | strncpy(ut->ut_name, li->username, |
668 | MIN_SIZEOF(ut->ut_name, li->username)); | |
a05a70ab | 669 | # ifdef HAVE_HOST_IN_UTMP |
fa64c868 | 670 | strncpy(ut->ut_host, li->hostname, |
671 | MIN_SIZEOF(ut->ut_host, li->hostname)); | |
a05a70ab | 672 | # endif |
673 | # ifdef HAVE_ADDR_IN_UTMP | |
564dd50a | 674 | /* this is just a 32-bit IP address */ |
675 | if (li->hostaddr.sa.sa_family == AF_INET) | |
676 | ut->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr; | |
2b87da3b | 677 | # endif |
9746ee4b | 678 | # ifdef HAVE_ADDR_V6_IN_UTMP |
679 | /* this is just a 128-bit IPv6 address */ | |
680 | if (li->hostaddr.sa.sa_family == AF_INET6) { | |
681 | sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa); | |
682 | memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16); | |
683 | if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) { | |
684 | ut->ut_addr_v6[0] = ut->ut_addr_v6[3]; | |
685 | ut->ut_addr_v6[1] = 0; | |
686 | ut->ut_addr_v6[2] = 0; | |
687 | ut->ut_addr_v6[3] = 0; | |
688 | } | |
689 | } | |
690 | # endif | |
564dd50a | 691 | } |
a05a70ab | 692 | #endif /* USE_UTMP || USE_WTMP || USE_LOGIN */ |
564dd50a | 693 | |
1d7b9b20 | 694 | /** |
695 | ** utmpx utility functions | |
564dd50a | 696 | ** |
697 | ** These functions manipulate struct utmpx, accounting for system | |
698 | ** variations. | |
1d7b9b20 | 699 | **/ |
700 | ||
701 | #if defined(USE_UTMPX) || defined (USE_WTMPX) | |
1d7b9b20 | 702 | /* build the utmpx structure */ |
703 | void | |
564dd50a | 704 | set_utmpx_time(struct logininfo *li, struct utmpx *utx) |
705 | { | |
fa64c868 | 706 | # if defined(HAVE_TV_IN_UTMPX) |
1d7b9b20 | 707 | utx->ut_tv.tv_sec = li->tv_sec; |
708 | utx->ut_tv.tv_usec = li->tv_usec; | |
fa64c868 | 709 | # elif defined(HAVE_TIME_IN_UTMPX) |
1d7b9b20 | 710 | utx->ut_time = li->tv_sec; |
fa64c868 | 711 | # endif |
1d7b9b20 | 712 | } |
713 | ||
714 | void | |
564dd50a | 715 | construct_utmpx(struct logininfo *li, struct utmpx *utx) |
716 | { | |
9746ee4b | 717 | # ifdef HAVE_ADDR_V6_IN_UTMP |
718 | struct sockaddr_in6 *sa6; | |
719 | # endif | |
dbaa2e87 | 720 | memset(utx, '\0', sizeof(*utx)); |
fa64c868 | 721 | |
daaff4d5 | 722 | # ifdef HAVE_ID_IN_UTMPX |
1d7b9b20 | 723 | line_abbrevname(utx->ut_id, li->line, sizeof(utx->ut_id)); |
daaff4d5 | 724 | # endif |
1d7b9b20 | 725 | |
726 | /* this is done here to keep utmp constants out of loginrec.h */ | |
727 | switch (li->type) { | |
728 | case LTYPE_LOGIN: | |
729 | utx->ut_type = USER_PROCESS; | |
730 | break; | |
731 | case LTYPE_LOGOUT: | |
732 | utx->ut_type = DEAD_PROCESS; | |
733 | break; | |
734 | } | |
1d7b9b20 | 735 | line_stripname(utx->ut_line, li->line, sizeof(utx->ut_line)); |
1d7b9b20 | 736 | set_utmpx_time(li, utx); |
5abcdf8e | 737 | utx->ut_pid = li->pid; |
fa64c868 | 738 | |
f3837bc6 | 739 | /* strncpy(): Don't necessarily want null termination */ |
fa64c868 | 740 | strncpy(utx->ut_name, li->username, |
741 | MIN_SIZEOF(utx->ut_name, li->username)); | |
5abcdf8e | 742 | |
743 | if (li->type == LTYPE_LOGOUT) | |
744 | return; | |
745 | ||
a05a70ab | 746 | /* |
747 | * These fields are only used when logging in, and are blank | |
2b87da3b | 748 | * for logouts. |
a05a70ab | 749 | */ |
5abcdf8e | 750 | |
a05a70ab | 751 | # ifdef HAVE_HOST_IN_UTMPX |
fa64c868 | 752 | strncpy(utx->ut_host, li->hostname, |
753 | MIN_SIZEOF(utx->ut_host, li->hostname)); | |
a05a70ab | 754 | # endif |
755 | # ifdef HAVE_ADDR_IN_UTMPX | |
764d4113 | 756 | /* this is just a 32-bit IP address */ |
757 | if (li->hostaddr.sa.sa_family == AF_INET) | |
758 | utx->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr; | |
a05a70ab | 759 | # endif |
9746ee4b | 760 | # ifdef HAVE_ADDR_V6_IN_UTMP |
761 | /* this is just a 128-bit IPv6 address */ | |
762 | if (li->hostaddr.sa.sa_family == AF_INET6) { | |
763 | sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa); | |
764 | memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16); | |
765 | if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) { | |
766 | ut->ut_addr_v6[0] = ut->ut_addr_v6[3]; | |
767 | ut->ut_addr_v6[1] = 0; | |
768 | ut->ut_addr_v6[2] = 0; | |
769 | ut->ut_addr_v6[3] = 0; | |
770 | } | |
771 | } | |
772 | # endif | |
a05a70ab | 773 | # ifdef HAVE_SYSLEN_IN_UTMPX |
5abcdf8e | 774 | /* ut_syslen is the length of the utx_host string */ |
775 | utx->ut_syslen = MIN(strlen(li->hostname), sizeof(utx->ut_host)); | |
a05a70ab | 776 | # endif |
564dd50a | 777 | } |
a05a70ab | 778 | #endif /* USE_UTMPX || USE_WTMPX */ |
1d7b9b20 | 779 | |
780 | /** | |
564dd50a | 781 | ** Low-level utmp functions |
1d7b9b20 | 782 | **/ |
783 | ||
784 | /* FIXME: (ATL) utmp_write_direct needs testing */ | |
1d7b9b20 | 785 | #ifdef USE_UTMP |
786 | ||
1d7b9b20 | 787 | /* if we can, use pututline() etc. */ |
a05a70ab | 788 | # if !defined(DISABLE_PUTUTLINE) && defined(HAVE_SETUTENT) && \ |
789 | defined(HAVE_PUTUTLINE) | |
1d7b9b20 | 790 | # define UTMP_USE_LIBRARY |
a05a70ab | 791 | # endif |
1d7b9b20 | 792 | |
793 | ||
794 | /* write a utmp entry with the system's help (pututline() and pals) */ | |
a05a70ab | 795 | # ifdef UTMP_USE_LIBRARY |
1d7b9b20 | 796 | static int |
564dd50a | 797 | utmp_write_library(struct logininfo *li, struct utmp *ut) |
798 | { | |
1d7b9b20 | 799 | setutent(); |
800 | pututline(ut); | |
a05a70ab | 801 | # ifdef HAVE_ENDUTENT |
1d7b9b20 | 802 | endutent(); |
a05a70ab | 803 | # endif |
fa64c868 | 804 | return (1); |
564dd50a | 805 | } |
a05a70ab | 806 | # else /* UTMP_USE_LIBRARY */ |
1d7b9b20 | 807 | |
fa64c868 | 808 | /* |
809 | * Write a utmp entry direct to the file | |
810 | * This is a slightly modification of code in OpenBSD's login.c | |
811 | */ | |
1d7b9b20 | 812 | static int |
564dd50a | 813 | utmp_write_direct(struct logininfo *li, struct utmp *ut) |
814 | { | |
1d7b9b20 | 815 | struct utmp old_ut; |
816 | register int fd; | |
817 | int tty; | |
818 | ||
5abcdf8e | 819 | /* FIXME: (ATL) ttyslot() needs local implementation */ |
dbaa2e87 | 820 | |
698d107e | 821 | #if defined(HAVE_GETTTYENT) |
fa64c868 | 822 | struct ttyent *ty; |
dbaa2e87 | 823 | |
824 | tty=0; | |
dbaa2e87 | 825 | setttyent(); |
fa64c868 | 826 | while (NULL != (ty = getttyent())) { |
dbaa2e87 | 827 | tty++; |
828 | if (!strncmp(ty->ty_name, ut->ut_line, sizeof(ut->ut_line))) | |
829 | break; | |
830 | } | |
831 | endttyent(); | |
832 | ||
fa64c868 | 833 | if (NULL == ty) { |
5f12e050 | 834 | logit("%s: tty not found", __func__); |
835 | return (0); | |
dbaa2e87 | 836 | } |
837 | #else /* FIXME */ | |
838 | ||
1d7b9b20 | 839 | tty = ttyslot(); /* seems only to work for /dev/ttyp? style names */ |
840 | ||
698d107e | 841 | #endif /* HAVE_GETTTYENT */ |
dbaa2e87 | 842 | |
1d7b9b20 | 843 | if (tty > 0 && (fd = open(UTMP_FILE, O_RDWR|O_CREAT, 0644)) >= 0) { |
5f12e050 | 844 | off_t pos, ret; |
845 | ||
846 | pos = (off_t)tty * sizeof(struct utmp); | |
847 | if ((ret = lseek(fd, pos, SEEK_SET)) == -1) { | |
f6d20d59 | 848 | logit("%s: lseek: %s", __func__, strerror(errno)); |
5f12e050 | 849 | return (0); |
850 | } | |
851 | if (ret != pos) { | |
f6d20d59 | 852 | logit("%s: Couldn't seek to tty %d slot in %s", |
853 | __func__, tty, UTMP_FILE); | |
5f12e050 | 854 | return (0); |
855 | } | |
1d7b9b20 | 856 | /* |
857 | * Prevent luser from zero'ing out ut_host. | |
858 | * If the new ut_line is empty but the old one is not | |
dc2a6d09 | 859 | * and ut_line and ut_name match, preserve the old ut_line. |
1d7b9b20 | 860 | */ |
2b87da3b | 861 | if (atomicio(read, fd, &old_ut, sizeof(old_ut)) == sizeof(old_ut) && |
fa64c868 | 862 | (ut->ut_host[0] == '\0') && (old_ut.ut_host[0] != '\0') && |
863 | (strncmp(old_ut.ut_line, ut->ut_line, sizeof(ut->ut_line)) == 0) && | |
864 | (strncmp(old_ut.ut_name, ut->ut_name, sizeof(ut->ut_name)) == 0)) | |
865 | memcpy(ut->ut_host, old_ut.ut_host, sizeof(ut->ut_host)); | |
2b87da3b | 866 | |
5f12e050 | 867 | if ((ret = lseek(fd, pos, SEEK_SET)) == -1) { |
f6d20d59 | 868 | logit("%s: lseek: %s", __func__, strerror(errno)); |
5f12e050 | 869 | return (0); |
870 | } | |
871 | if (ret != pos) { | |
f6d20d59 | 872 | logit("%s: Couldn't seek to tty %d slot in %s", |
5f12e050 | 873 | __func__, tty, UTMP_FILE); |
874 | return (0); | |
875 | } | |
fa64c868 | 876 | if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) { |
5f12e050 | 877 | logit("%s: error writing %s: %s", __func__, |
5abcdf8e | 878 | UTMP_FILE, strerror(errno)); |
fa64c868 | 879 | } |
2b87da3b | 880 | |
fa64c868 | 881 | close(fd); |
882 | return (1); | |
9f32ceb4 | 883 | } else { |
fa64c868 | 884 | return (0); |
9f32ceb4 | 885 | } |
564dd50a | 886 | } |
a05a70ab | 887 | # endif /* UTMP_USE_LIBRARY */ |
1d7b9b20 | 888 | |
889 | static int | |
564dd50a | 890 | utmp_perform_login(struct logininfo *li) |
891 | { | |
1d7b9b20 | 892 | struct utmp ut; |
893 | ||
894 | construct_utmp(li, &ut); | |
a05a70ab | 895 | # ifdef UTMP_USE_LIBRARY |
1d7b9b20 | 896 | if (!utmp_write_library(li, &ut)) { |
a233586b | 897 | logit("%s: utmp_write_library() failed", __func__); |
fa64c868 | 898 | return (0); |
1d7b9b20 | 899 | } |
a05a70ab | 900 | # else |
1d7b9b20 | 901 | if (!utmp_write_direct(li, &ut)) { |
a233586b | 902 | logit("%s: utmp_write_direct() failed", __func__); |
fa64c868 | 903 | return (0); |
1d7b9b20 | 904 | } |
a05a70ab | 905 | # endif |
fa64c868 | 906 | return (1); |
564dd50a | 907 | } |
1d7b9b20 | 908 | |
909 | ||
910 | static int | |
564dd50a | 911 | utmp_perform_logout(struct logininfo *li) |
912 | { | |
1d7b9b20 | 913 | struct utmp ut; |
914 | ||
5abcdf8e | 915 | construct_utmp(li, &ut); |
a05a70ab | 916 | # ifdef UTMP_USE_LIBRARY |
5abcdf8e | 917 | if (!utmp_write_library(li, &ut)) { |
a233586b | 918 | logit("%s: utmp_write_library() failed", __func__); |
fa64c868 | 919 | return (0); |
5abcdf8e | 920 | } |
a05a70ab | 921 | # else |
5abcdf8e | 922 | if (!utmp_write_direct(li, &ut)) { |
a233586b | 923 | logit("%s: utmp_write_direct() failed", __func__); |
fa64c868 | 924 | return (0); |
5abcdf8e | 925 | } |
a05a70ab | 926 | # endif |
fa64c868 | 927 | return (1); |
564dd50a | 928 | } |
1d7b9b20 | 929 | |
930 | ||
931 | int | |
564dd50a | 932 | utmp_write_entry(struct logininfo *li) |
933 | { | |
1d7b9b20 | 934 | switch(li->type) { |
935 | case LTYPE_LOGIN: | |
fa64c868 | 936 | return (utmp_perform_login(li)); |
1d7b9b20 | 937 | |
938 | case LTYPE_LOGOUT: | |
fa64c868 | 939 | return (utmp_perform_logout(li)); |
1d7b9b20 | 940 | |
941 | default: | |
a233586b | 942 | logit("%s: invalid type field", __func__); |
fa64c868 | 943 | return (0); |
1d7b9b20 | 944 | } |
564dd50a | 945 | } |
a05a70ab | 946 | #endif /* USE_UTMP */ |
1d7b9b20 | 947 | |
948 | ||
949 | /** | |
564dd50a | 950 | ** Low-level utmpx functions |
1d7b9b20 | 951 | **/ |
952 | ||
953 | /* not much point if we don't want utmpx entries */ | |
954 | #ifdef USE_UTMPX | |
955 | ||
1d7b9b20 | 956 | /* if we have the wherewithall, use pututxline etc. */ |
a05a70ab | 957 | # if !defined(DISABLE_PUTUTXLINE) && defined(HAVE_SETUTXENT) && \ |
958 | defined(HAVE_PUTUTXLINE) | |
1d7b9b20 | 959 | # define UTMPX_USE_LIBRARY |
a05a70ab | 960 | # endif |
1d7b9b20 | 961 | |
962 | ||
963 | /* write a utmpx entry with the system's help (pututxline() and pals) */ | |
a05a70ab | 964 | # ifdef UTMPX_USE_LIBRARY |
1d7b9b20 | 965 | static int |
564dd50a | 966 | utmpx_write_library(struct logininfo *li, struct utmpx *utx) |
967 | { | |
1d7b9b20 | 968 | setutxent(); |
969 | pututxline(utx); | |
970 | ||
a05a70ab | 971 | # ifdef HAVE_ENDUTXENT |
1d7b9b20 | 972 | endutxent(); |
a05a70ab | 973 | # endif |
fa64c868 | 974 | return (1); |
564dd50a | 975 | } |
1d7b9b20 | 976 | |
a05a70ab | 977 | # else /* UTMPX_USE_LIBRARY */ |
1d7b9b20 | 978 | |
979 | /* write a utmp entry direct to the file */ | |
980 | static int | |
564dd50a | 981 | utmpx_write_direct(struct logininfo *li, struct utmpx *utx) |
2b87da3b | 982 | { |
a233586b | 983 | logit("%s: not implemented!", __func__); |
fa64c868 | 984 | return (0); |
564dd50a | 985 | } |
a05a70ab | 986 | # endif /* UTMPX_USE_LIBRARY */ |
1d7b9b20 | 987 | |
988 | static int | |
564dd50a | 989 | utmpx_perform_login(struct logininfo *li) |
990 | { | |
1d7b9b20 | 991 | struct utmpx utx; |
992 | ||
993 | construct_utmpx(li, &utx); | |
a05a70ab | 994 | # ifdef UTMPX_USE_LIBRARY |
1d7b9b20 | 995 | if (!utmpx_write_library(li, &utx)) { |
a233586b | 996 | logit("%s: utmp_write_library() failed", __func__); |
fa64c868 | 997 | return (0); |
1d7b9b20 | 998 | } |
a05a70ab | 999 | # else |
1d7b9b20 | 1000 | if (!utmpx_write_direct(li, &ut)) { |
a233586b | 1001 | logit("%s: utmp_write_direct() failed", __func__); |
fa64c868 | 1002 | return (0); |
1d7b9b20 | 1003 | } |
a05a70ab | 1004 | # endif |
fa64c868 | 1005 | return (1); |
564dd50a | 1006 | } |
1d7b9b20 | 1007 | |
1008 | ||
1009 | static int | |
564dd50a | 1010 | utmpx_perform_logout(struct logininfo *li) |
1011 | { | |
1d7b9b20 | 1012 | struct utmpx utx; |
1013 | ||
f3837bc6 | 1014 | construct_utmpx(li, &utx); |
a05a70ab | 1015 | # ifdef HAVE_ID_IN_UTMPX |
1d7b9b20 | 1016 | line_abbrevname(utx.ut_id, li->line, sizeof(utx.ut_id)); |
a05a70ab | 1017 | # endif |
1018 | # ifdef HAVE_TYPE_IN_UTMPX | |
1d7b9b20 | 1019 | utx.ut_type = DEAD_PROCESS; |
a05a70ab | 1020 | # endif |
1d7b9b20 | 1021 | |
a05a70ab | 1022 | # ifdef UTMPX_USE_LIBRARY |
1d7b9b20 | 1023 | utmpx_write_library(li, &utx); |
a05a70ab | 1024 | # else |
1d7b9b20 | 1025 | utmpx_write_direct(li, &utx); |
a05a70ab | 1026 | # endif |
fa64c868 | 1027 | return (1); |
564dd50a | 1028 | } |
1d7b9b20 | 1029 | |
1d7b9b20 | 1030 | int |
564dd50a | 1031 | utmpx_write_entry(struct logininfo *li) |
1032 | { | |
1d7b9b20 | 1033 | switch(li->type) { |
1034 | case LTYPE_LOGIN: | |
fa64c868 | 1035 | return (utmpx_perform_login(li)); |
1d7b9b20 | 1036 | case LTYPE_LOGOUT: |
fa64c868 | 1037 | return (utmpx_perform_logout(li)); |
1d7b9b20 | 1038 | default: |
a233586b | 1039 | logit("%s: invalid type field", __func__); |
fa64c868 | 1040 | return (0); |
1d7b9b20 | 1041 | } |
564dd50a | 1042 | } |
a05a70ab | 1043 | #endif /* USE_UTMPX */ |
1d7b9b20 | 1044 | |
1045 | ||
1046 | /** | |
564dd50a | 1047 | ** Low-level wtmp functions |
1d7b9b20 | 1048 | **/ |
1049 | ||
2b87da3b | 1050 | #ifdef USE_WTMP |
1d7b9b20 | 1051 | |
fa64c868 | 1052 | /* |
1053 | * Write a wtmp entry direct to the end of the file | |
1054 | * This is a slight modification of code in OpenBSD's logwtmp.c | |
1055 | */ | |
1d7b9b20 | 1056 | static int |
564dd50a | 1057 | wtmp_write(struct logininfo *li, struct utmp *ut) |
1058 | { | |
1d7b9b20 | 1059 | struct stat buf; |
1060 | int fd, ret = 1; | |
1061 | ||
1062 | if ((fd = open(WTMP_FILE, O_WRONLY|O_APPEND, 0)) < 0) { | |
a233586b | 1063 | logit("%s: problem writing %s: %s", __func__, |
1d7b9b20 | 1064 | WTMP_FILE, strerror(errno)); |
fa64c868 | 1065 | return (0); |
1d7b9b20 | 1066 | } |
2b87da3b | 1067 | if (fstat(fd, &buf) == 0) |
d72f7b79 | 1068 | if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) { |
1d7b9b20 | 1069 | ftruncate(fd, buf.st_size); |
a233586b | 1070 | logit("%s: problem writing %s: %s", __func__, |
1d7b9b20 | 1071 | WTMP_FILE, strerror(errno)); |
1072 | ret = 0; | |
1073 | } | |
fa64c868 | 1074 | close(fd); |
1075 | return (ret); | |
564dd50a | 1076 | } |
1d7b9b20 | 1077 | |
1d7b9b20 | 1078 | static int |
a05a70ab | 1079 | wtmp_perform_login(struct logininfo *li) |
1080 | { | |
1d7b9b20 | 1081 | struct utmp ut; |
1082 | ||
1083 | construct_utmp(li, &ut); | |
fa64c868 | 1084 | return (wtmp_write(li, &ut)); |
564dd50a | 1085 | } |
1d7b9b20 | 1086 | |
1087 | ||
1088 | static int | |
564dd50a | 1089 | wtmp_perform_logout(struct logininfo *li) |
1090 | { | |
1d7b9b20 | 1091 | struct utmp ut; |
1092 | ||
1093 | construct_utmp(li, &ut); | |
fa64c868 | 1094 | return (wtmp_write(li, &ut)); |
564dd50a | 1095 | } |
1d7b9b20 | 1096 | |
1097 | ||
1098 | int | |
564dd50a | 1099 | wtmp_write_entry(struct logininfo *li) |
1100 | { | |
1d7b9b20 | 1101 | switch(li->type) { |
1102 | case LTYPE_LOGIN: | |
fa64c868 | 1103 | return (wtmp_perform_login(li)); |
1d7b9b20 | 1104 | case LTYPE_LOGOUT: |
fa64c868 | 1105 | return (wtmp_perform_logout(li)); |
1d7b9b20 | 1106 | default: |
a233586b | 1107 | logit("%s: invalid type field", __func__); |
fa64c868 | 1108 | return (0); |
1d7b9b20 | 1109 | } |
564dd50a | 1110 | } |
1d7b9b20 | 1111 | |
1112 | ||
fa64c868 | 1113 | /* |
1114 | * Notes on fetching login data from wtmp/wtmpx | |
2b87da3b | 1115 | * |
5abcdf8e | 1116 | * Logouts are usually recorded with (amongst other things) a blank |
1117 | * username on a given tty line. However, some systems (HP-UX is one) | |
1118 | * leave all fields set, but change the ut_type field to DEAD_PROCESS. | |
1119 | * | |
1120 | * Since we're only looking for logins here, we know that the username | |
1121 | * must be set correctly. On systems that leave it in, we check for | |
1122 | * ut_type==USER_PROCESS (indicating a login.) | |
1123 | * | |
1124 | * Portability: Some systems may set something other than USER_PROCESS | |
1125 | * to indicate a login process. I don't know of any as I write. Also, | |
1126 | * it's possible that some systems may both leave the username in | |
1127 | * place and not have ut_type. | |
1128 | */ | |
1129 | ||
5abcdf8e | 1130 | /* return true if this wtmp entry indicates a login */ |
1131 | static int | |
1132 | wtmp_islogin(struct logininfo *li, struct utmp *ut) | |
1133 | { | |
2b87da3b | 1134 | if (strncmp(li->username, ut->ut_name, |
fa64c868 | 1135 | MIN_SIZEOF(li->username, ut->ut_name)) == 0) { |
a05a70ab | 1136 | # ifdef HAVE_TYPE_IN_UTMP |
5abcdf8e | 1137 | if (ut->ut_type & USER_PROCESS) |
fa64c868 | 1138 | return (1); |
a05a70ab | 1139 | # else |
fa64c868 | 1140 | return (1); |
a05a70ab | 1141 | # endif |
5abcdf8e | 1142 | } |
fa64c868 | 1143 | return (0); |
5abcdf8e | 1144 | } |
1145 | ||
1d7b9b20 | 1146 | int |
564dd50a | 1147 | wtmp_get_entry(struct logininfo *li) |
1148 | { | |
1d7b9b20 | 1149 | struct stat st; |
1150 | struct utmp ut; | |
fa64c868 | 1151 | int fd, found = 0; |
5abcdf8e | 1152 | |
1153 | /* Clear the time entries in our logininfo */ | |
1154 | li->tv_sec = li->tv_usec = 0; | |
1d7b9b20 | 1155 | |
1156 | if ((fd = open(WTMP_FILE, O_RDONLY)) < 0) { | |
a233586b | 1157 | logit("%s: problem opening %s: %s", __func__, |
1d7b9b20 | 1158 | WTMP_FILE, strerror(errno)); |
fa64c868 | 1159 | return (0); |
1d7b9b20 | 1160 | } |
2b87da3b | 1161 | if (fstat(fd, &st) != 0) { |
a233586b | 1162 | logit("%s: couldn't stat %s: %s", __func__, |
1d7b9b20 | 1163 | WTMP_FILE, strerror(errno)); |
1164 | close(fd); | |
fa64c868 | 1165 | return (0); |
1d7b9b20 | 1166 | } |
1d7b9b20 | 1167 | |
5abcdf8e | 1168 | /* Seek to the start of the last struct utmp */ |
d9d47a26 | 1169 | if (lseek(fd, -(off_t)sizeof(struct utmp), SEEK_END) == -1) { |
5abcdf8e | 1170 | /* Looks like we've got a fresh wtmp file */ |
1171 | close(fd); | |
fa64c868 | 1172 | return (0); |
5abcdf8e | 1173 | } |
1174 | ||
1175 | while (!found) { | |
9f32ceb4 | 1176 | if (atomicio(read, fd, &ut, sizeof(ut)) != sizeof(ut)) { |
a233586b | 1177 | logit("%s: read of %s failed: %s", __func__, |
1d7b9b20 | 1178 | WTMP_FILE, strerror(errno)); |
1179 | close (fd); | |
fa64c868 | 1180 | return (0); |
1d7b9b20 | 1181 | } |
5abcdf8e | 1182 | if ( wtmp_islogin(li, &ut) ) { |
1183 | found = 1; | |
fa64c868 | 1184 | /* |
1185 | * We've already checked for a time in struct | |
1186 | * utmp, in login_getlast() | |
1187 | */ | |
a05a70ab | 1188 | # ifdef HAVE_TIME_IN_UTMP |
1d7b9b20 | 1189 | li->tv_sec = ut.ut_time; |
a05a70ab | 1190 | # else |
1d7b9b20 | 1191 | # if HAVE_TV_IN_UTMP |
1192 | li->tv_sec = ut.ut_tv.tv_sec; | |
1193 | # endif | |
a05a70ab | 1194 | # endif |
5abcdf8e | 1195 | line_fullname(li->line, ut.ut_line, |
fa64c868 | 1196 | MIN_SIZEOF(li->line, ut.ut_line)); |
a05a70ab | 1197 | # ifdef HAVE_HOST_IN_UTMP |
5abcdf8e | 1198 | strlcpy(li->hostname, ut.ut_host, |
fa64c868 | 1199 | MIN_SIZEOF(li->hostname, ut.ut_host)); |
a05a70ab | 1200 | # endif |
5abcdf8e | 1201 | continue; |
1d7b9b20 | 1202 | } |
5abcdf8e | 1203 | /* Seek back 2 x struct utmp */ |
d9d47a26 | 1204 | if (lseek(fd, -(off_t)(2 * sizeof(struct utmp)), SEEK_CUR) == -1) { |
5abcdf8e | 1205 | /* We've found the start of the file, so quit */ |
fa64c868 | 1206 | close(fd); |
1207 | return (0); | |
1d7b9b20 | 1208 | } |
5abcdf8e | 1209 | } |
1210 | ||
1211 | /* We found an entry. Tidy up and return */ | |
1212 | close(fd); | |
fa64c868 | 1213 | return (1); |
564dd50a | 1214 | } |
a05a70ab | 1215 | # endif /* USE_WTMP */ |
1d7b9b20 | 1216 | |
1217 | ||
1218 | /** | |
564dd50a | 1219 | ** Low-level wtmpx functions |
1d7b9b20 | 1220 | **/ |
1221 | ||
1222 | #ifdef USE_WTMPX | |
fa64c868 | 1223 | /* |
1224 | * Write a wtmpx entry direct to the end of the file | |
1225 | * This is a slight modification of code in OpenBSD's logwtmp.c | |
1226 | */ | |
1d7b9b20 | 1227 | static int |
564dd50a | 1228 | wtmpx_write(struct logininfo *li, struct utmpx *utx) |
1229 | { | |
41c64c91 | 1230 | #ifndef HAVE_UPDWTMPX |
1d7b9b20 | 1231 | struct stat buf; |
1232 | int fd, ret = 1; | |
1233 | ||
1234 | if ((fd = open(WTMPX_FILE, O_WRONLY|O_APPEND, 0)) < 0) { | |
a233586b | 1235 | logit("%s: problem opening %s: %s", __func__, |
1d7b9b20 | 1236 | WTMPX_FILE, strerror(errno)); |
fa64c868 | 1237 | return (0); |
1d7b9b20 | 1238 | } |
1239 | ||
2b87da3b | 1240 | if (fstat(fd, &buf) == 0) |
d72f7b79 | 1241 | if (atomicio(vwrite, fd, utx, sizeof(*utx)) != sizeof(*utx)) { |
1d7b9b20 | 1242 | ftruncate(fd, buf.st_size); |
a233586b | 1243 | logit("%s: problem writing %s: %s", __func__, |
1d7b9b20 | 1244 | WTMPX_FILE, strerror(errno)); |
1245 | ret = 0; | |
1246 | } | |
fa64c868 | 1247 | close(fd); |
1d7b9b20 | 1248 | |
fa64c868 | 1249 | return (ret); |
41c64c91 | 1250 | #else |
1251 | updwtmpx(WTMPX_FILE, utx); | |
fa64c868 | 1252 | return (1); |
41c64c91 | 1253 | #endif |
564dd50a | 1254 | } |
1d7b9b20 | 1255 | |
1256 | ||
1257 | static int | |
564dd50a | 1258 | wtmpx_perform_login(struct logininfo *li) |
1259 | { | |
1d7b9b20 | 1260 | struct utmpx utx; |
1261 | ||
1262 | construct_utmpx(li, &utx); | |
fa64c868 | 1263 | return (wtmpx_write(li, &utx)); |
564dd50a | 1264 | } |
1d7b9b20 | 1265 | |
1266 | ||
1267 | static int | |
564dd50a | 1268 | wtmpx_perform_logout(struct logininfo *li) |
1269 | { | |
1d7b9b20 | 1270 | struct utmpx utx; |
1271 | ||
1272 | construct_utmpx(li, &utx); | |
fa64c868 | 1273 | return (wtmpx_write(li, &utx)); |
564dd50a | 1274 | } |
1d7b9b20 | 1275 | |
1276 | ||
1277 | int | |
564dd50a | 1278 | wtmpx_write_entry(struct logininfo *li) |
1279 | { | |
1d7b9b20 | 1280 | switch(li->type) { |
1281 | case LTYPE_LOGIN: | |
fa64c868 | 1282 | return (wtmpx_perform_login(li)); |
1d7b9b20 | 1283 | case LTYPE_LOGOUT: |
fa64c868 | 1284 | return (wtmpx_perform_logout(li)); |
1d7b9b20 | 1285 | default: |
a233586b | 1286 | logit("%s: invalid type field", __func__); |
fa64c868 | 1287 | return (0); |
1d7b9b20 | 1288 | } |
564dd50a | 1289 | } |
1d7b9b20 | 1290 | |
5abcdf8e | 1291 | /* Please see the notes above wtmp_islogin() for information about the |
1292 | next two functions */ | |
1293 | ||
1294 | /* Return true if this wtmpx entry indicates a login */ | |
1295 | static int | |
1296 | wtmpx_islogin(struct logininfo *li, struct utmpx *utx) | |
1297 | { | |
fa64c868 | 1298 | if (strncmp(li->username, utx->ut_name, |
1299 | MIN_SIZEOF(li->username, utx->ut_name)) == 0 ) { | |
a05a70ab | 1300 | # ifdef HAVE_TYPE_IN_UTMPX |
5abcdf8e | 1301 | if (utx->ut_type == USER_PROCESS) |
fa64c868 | 1302 | return (1); |
a05a70ab | 1303 | # else |
fa64c868 | 1304 | return (1); |
a05a70ab | 1305 | # endif |
5abcdf8e | 1306 | } |
fa64c868 | 1307 | return (0); |
5abcdf8e | 1308 | } |
1309 | ||
1d7b9b20 | 1310 | |
1311 | int | |
564dd50a | 1312 | wtmpx_get_entry(struct logininfo *li) |
1313 | { | |
1d7b9b20 | 1314 | struct stat st; |
1315 | struct utmpx utx; | |
5abcdf8e | 1316 | int fd, found=0; |
1317 | ||
1318 | /* Clear the time entries */ | |
1319 | li->tv_sec = li->tv_usec = 0; | |
1d7b9b20 | 1320 | |
1321 | if ((fd = open(WTMPX_FILE, O_RDONLY)) < 0) { | |
a233586b | 1322 | logit("%s: problem opening %s: %s", __func__, |
1d7b9b20 | 1323 | WTMPX_FILE, strerror(errno)); |
fa64c868 | 1324 | return (0); |
1d7b9b20 | 1325 | } |
2b87da3b | 1326 | if (fstat(fd, &st) != 0) { |
a233586b | 1327 | logit("%s: couldn't stat %s: %s", __func__, |
fdebdd4f | 1328 | WTMPX_FILE, strerror(errno)); |
1d7b9b20 | 1329 | close(fd); |
fa64c868 | 1330 | return (0); |
1d7b9b20 | 1331 | } |
2b87da3b | 1332 | |
5abcdf8e | 1333 | /* Seek to the start of the last struct utmpx */ |
d9d47a26 | 1334 | if (lseek(fd, -(off_t)sizeof(struct utmpx), SEEK_END) == -1 ) { |
5abcdf8e | 1335 | /* probably a newly rotated wtmpx file */ |
1336 | close(fd); | |
fa64c868 | 1337 | return (0); |
5abcdf8e | 1338 | } |
1d7b9b20 | 1339 | |
5abcdf8e | 1340 | while (!found) { |
9f32ceb4 | 1341 | if (atomicio(read, fd, &utx, sizeof(utx)) != sizeof(utx)) { |
a233586b | 1342 | logit("%s: read of %s failed: %s", __func__, |
1d7b9b20 | 1343 | WTMPX_FILE, strerror(errno)); |
1344 | close (fd); | |
fa64c868 | 1345 | return (0); |
1d7b9b20 | 1346 | } |
fa64c868 | 1347 | /* |
1348 | * Logouts are recorded as a blank username on a particular | |
1349 | * line. So, we just need to find the username in struct utmpx | |
1350 | */ | |
1351 | if (wtmpx_islogin(li, &utx)) { | |
d80063fe | 1352 | found = 1; |
fa64c868 | 1353 | # if defined(HAVE_TV_IN_UTMPX) |
1d7b9b20 | 1354 | li->tv_sec = utx.ut_tv.tv_sec; |
fa64c868 | 1355 | # elif defined(HAVE_TIME_IN_UTMPX) |
1d7b9b20 | 1356 | li->tv_sec = utx.ut_time; |
a05a70ab | 1357 | # endif |
a4d05724 | 1358 | line_fullname(li->line, utx.ut_line, sizeof(li->line)); |
fa64c868 | 1359 | # if defined(HAVE_HOST_IN_UTMPX) |
5abcdf8e | 1360 | strlcpy(li->hostname, utx.ut_host, |
fa64c868 | 1361 | MIN_SIZEOF(li->hostname, utx.ut_host)); |
a05a70ab | 1362 | # endif |
5abcdf8e | 1363 | continue; |
1d7b9b20 | 1364 | } |
d9d47a26 | 1365 | if (lseek(fd, -(off_t)(2 * sizeof(struct utmpx)), SEEK_CUR) == -1) { |
fa64c868 | 1366 | close(fd); |
1367 | return (0); | |
1d7b9b20 | 1368 | } |
5abcdf8e | 1369 | } |
1370 | ||
1371 | close(fd); | |
fa64c868 | 1372 | return (1); |
564dd50a | 1373 | } |
f988dce5 | 1374 | #endif /* USE_WTMPX */ |
1d7b9b20 | 1375 | |
1d7b9b20 | 1376 | /** |
564dd50a | 1377 | ** Low-level libutil login() functions |
1d7b9b20 | 1378 | **/ |
1379 | ||
1380 | #ifdef USE_LOGIN | |
1d7b9b20 | 1381 | static int |
564dd50a | 1382 | syslogin_perform_login(struct logininfo *li) |
1383 | { | |
1d7b9b20 | 1384 | struct utmp *ut; |
1385 | ||
7a52470e | 1386 | ut = xmalloc(sizeof(*ut)); |
1d7b9b20 | 1387 | construct_utmp(li, ut); |
1388 | login(ut); | |
6cef88bc | 1389 | free(ut); |
1d7b9b20 | 1390 | |
fa64c868 | 1391 | return (1); |
564dd50a | 1392 | } |
1d7b9b20 | 1393 | |
564dd50a | 1394 | static int |
1395 | syslogin_perform_logout(struct logininfo *li) | |
1396 | { | |
a05a70ab | 1397 | # ifdef HAVE_LOGOUT |
f20d4564 | 1398 | char line[UT_LINESIZE]; |
2b87da3b | 1399 | |
1d7b9b20 | 1400 | (void)line_stripname(line, li->line, sizeof(line)); |
1401 | ||
fa64c868 | 1402 | if (!logout(line)) |
a233586b | 1403 | logit("%s: logout() returned an error", __func__); |
a05a70ab | 1404 | # ifdef HAVE_LOGWTMP |
fa64c868 | 1405 | else |
1d7b9b20 | 1406 | logwtmp(line, "", ""); |
a05a70ab | 1407 | # endif |
5abcdf8e | 1408 | /* FIXME: (ATL - if the need arises) What to do if we have |
1409 | * login, but no logout? what if logout but no logwtmp? All | |
1410 | * routines are in libutil so they should all be there, | |
1411 | * but... */ | |
a05a70ab | 1412 | # endif |
fa64c868 | 1413 | return (1); |
564dd50a | 1414 | } |
1d7b9b20 | 1415 | |
1d7b9b20 | 1416 | int |
564dd50a | 1417 | syslogin_write_entry(struct logininfo *li) |
1418 | { | |
1d7b9b20 | 1419 | switch (li->type) { |
1420 | case LTYPE_LOGIN: | |
fa64c868 | 1421 | return (syslogin_perform_login(li)); |
1d7b9b20 | 1422 | case LTYPE_LOGOUT: |
fa64c868 | 1423 | return (syslogin_perform_logout(li)); |
1d7b9b20 | 1424 | default: |
a233586b | 1425 | logit("%s: Invalid type field", __func__); |
fa64c868 | 1426 | return (0); |
1d7b9b20 | 1427 | } |
564dd50a | 1428 | } |
f988dce5 | 1429 | #endif /* USE_LOGIN */ |
1d7b9b20 | 1430 | |
1431 | /* end of file log-syslogin.c */ | |
1432 | ||
1d7b9b20 | 1433 | /** |
564dd50a | 1434 | ** Low-level lastlog functions |
1d7b9b20 | 1435 | **/ |
1436 | ||
1437 | #ifdef USE_LASTLOG | |
a05a70ab | 1438 | #define LL_FILE 1 |
1439 | #define LL_DIR 2 | |
1440 | #define LL_OTHER 3 | |
1d7b9b20 | 1441 | |
1d7b9b20 | 1442 | static void |
564dd50a | 1443 | lastlog_construct(struct logininfo *li, struct lastlog *last) |
1444 | { | |
1d7b9b20 | 1445 | /* clear the structure */ |
dbaa2e87 | 1446 | memset(last, '\0', sizeof(*last)); |
2b87da3b | 1447 | |
fa64c868 | 1448 | line_stripname(last->ll_line, li->line, sizeof(last->ll_line)); |
5abcdf8e | 1449 | strlcpy(last->ll_host, li->hostname, |
1450 | MIN_SIZEOF(last->ll_host, li->hostname)); | |
1d7b9b20 | 1451 | last->ll_time = li->tv_sec; |
564dd50a | 1452 | } |
1d7b9b20 | 1453 | |
1d7b9b20 | 1454 | static int |
564dd50a | 1455 | lastlog_filetype(char *filename) |
1456 | { | |
1d7b9b20 | 1457 | struct stat st; |
1458 | ||
a05a70ab | 1459 | if (stat(LASTLOG_FILE, &st) != 0) { |
a233586b | 1460 | logit("%s: Couldn't stat %s: %s", __func__, |
fa64c868 | 1461 | LASTLOG_FILE, strerror(errno)); |
1462 | return (0); | |
1d7b9b20 | 1463 | } |
1d7b9b20 | 1464 | if (S_ISDIR(st.st_mode)) |
fa64c868 | 1465 | return (LL_DIR); |
1d7b9b20 | 1466 | else if (S_ISREG(st.st_mode)) |
fa64c868 | 1467 | return (LL_FILE); |
1d7b9b20 | 1468 | else |
fa64c868 | 1469 | return (LL_OTHER); |
564dd50a | 1470 | } |
1d7b9b20 | 1471 | |
1472 | ||
1473 | /* open the file (using filemode) and seek to the login entry */ | |
1474 | static int | |
564dd50a | 1475 | lastlog_openseek(struct logininfo *li, int *fd, int filemode) |
1476 | { | |
1d7b9b20 | 1477 | off_t offset; |
1478 | int type; | |
1479 | char lastlog_file[1024]; | |
1480 | ||
1481 | type = lastlog_filetype(LASTLOG_FILE); | |
1482 | switch (type) { | |
fa64c868 | 1483 | case LL_FILE: |
1484 | strlcpy(lastlog_file, LASTLOG_FILE, | |
1485 | sizeof(lastlog_file)); | |
1486 | break; | |
1487 | case LL_DIR: | |
1488 | snprintf(lastlog_file, sizeof(lastlog_file), "%s/%s", | |
1489 | LASTLOG_FILE, li->username); | |
1490 | break; | |
1491 | default: | |
a233586b | 1492 | logit("%s: %.100s is not a file or directory!", __func__, |
fa64c868 | 1493 | LASTLOG_FILE); |
1494 | return (0); | |
a05a70ab | 1495 | } |
1d7b9b20 | 1496 | |
ee476051 | 1497 | *fd = open(lastlog_file, filemode, 0600); |
fa64c868 | 1498 | if (*fd < 0) { |
a233586b | 1499 | debug("%s: Couldn't open %s: %s", __func__, |
1d7b9b20 | 1500 | lastlog_file, strerror(errno)); |
fa64c868 | 1501 | return (0); |
1d7b9b20 | 1502 | } |
2b87da3b | 1503 | |
d93a7e5a | 1504 | if (type == LL_FILE) { |
1505 | /* find this uid's offset in the lastlog file */ | |
d9d47a26 | 1506 | offset = (off_t) ((long)li->uid * sizeof(struct lastlog)); |
1d7b9b20 | 1507 | |
fa64c868 | 1508 | if (lseek(*fd, offset, SEEK_SET) != offset) { |
a233586b | 1509 | logit("%s: %s->lseek(): %s", __func__, |
1510 | lastlog_file, strerror(errno)); | |
fa64c868 | 1511 | return (0); |
d93a7e5a | 1512 | } |
1d7b9b20 | 1513 | } |
2b87da3b | 1514 | |
fa64c868 | 1515 | return (1); |
564dd50a | 1516 | } |
1d7b9b20 | 1517 | |
1518 | static int | |
564dd50a | 1519 | lastlog_perform_login(struct logininfo *li) |
1520 | { | |
1d7b9b20 | 1521 | struct lastlog last; |
1522 | int fd; | |
1523 | ||
1524 | /* create our struct lastlog */ | |
1525 | lastlog_construct(li, &last); | |
1526 | ||
ee476051 | 1527 | if (!lastlog_openseek(li, &fd, O_RDWR|O_CREAT)) |
fa64c868 | 1528 | return (0); |
2b87da3b | 1529 | |
1d7b9b20 | 1530 | /* write the entry */ |
d72f7b79 | 1531 | if (atomicio(vwrite, fd, &last, sizeof(last)) != sizeof(last)) { |
1a022229 | 1532 | close(fd); |
a233586b | 1533 | logit("%s: Error writing to %s: %s", __func__, |
1a022229 | 1534 | LASTLOG_FILE, strerror(errno)); |
fa64c868 | 1535 | return (0); |
a05a70ab | 1536 | } |
1a022229 | 1537 | |
1538 | close(fd); | |
fa64c868 | 1539 | return (1); |
564dd50a | 1540 | } |
1d7b9b20 | 1541 | |
1d7b9b20 | 1542 | int |
564dd50a | 1543 | lastlog_write_entry(struct logininfo *li) |
1544 | { | |
1d7b9b20 | 1545 | switch(li->type) { |
1546 | case LTYPE_LOGIN: | |
fa64c868 | 1547 | return (lastlog_perform_login(li)); |
1d7b9b20 | 1548 | default: |
a233586b | 1549 | logit("%s: Invalid type field", __func__); |
fa64c868 | 1550 | return (0); |
1d7b9b20 | 1551 | } |
564dd50a | 1552 | } |
1d7b9b20 | 1553 | |
1d7b9b20 | 1554 | static void |
564dd50a | 1555 | lastlog_populate_entry(struct logininfo *li, struct lastlog *last) |
1556 | { | |
1d7b9b20 | 1557 | line_fullname(li->line, last->ll_line, sizeof(li->line)); |
2b87da3b | 1558 | strlcpy(li->hostname, last->ll_host, |
fa64c868 | 1559 | MIN_SIZEOF(li->hostname, last->ll_host)); |
1d7b9b20 | 1560 | li->tv_sec = last->ll_time; |
564dd50a | 1561 | } |
1d7b9b20 | 1562 | |
1d7b9b20 | 1563 | int |
564dd50a | 1564 | lastlog_get_entry(struct logininfo *li) |
1565 | { | |
1d7b9b20 | 1566 | struct lastlog last; |
ed05a983 | 1567 | int fd, ret; |
1d7b9b20 | 1568 | |
ce49121d | 1569 | if (!lastlog_openseek(li, &fd, O_RDONLY)) |
ed05a983 | 1570 | return (0); |
ce49121d | 1571 | |
ed05a983 | 1572 | ret = atomicio(read, fd, &last, sizeof(last)); |
ce49121d | 1573 | close(fd); |
1574 | ||
ed05a983 | 1575 | switch (ret) { |
1576 | case 0: | |
1577 | memset(&last, '\0', sizeof(last)); | |
1578 | /* FALLTHRU */ | |
1579 | case sizeof(last): | |
1580 | lastlog_populate_entry(li, &last); | |
1581 | return (1); | |
1582 | case -1: | |
aff51935 | 1583 | error("%s: Error reading from %s: %s", __func__, |
ed05a983 | 1584 | LASTLOG_FILE, strerror(errno)); |
1585 | return (0); | |
1586 | default: | |
1587 | error("%s: Error reading from %s: Expecting %d, got %d", | |
1588 | __func__, LASTLOG_FILE, sizeof(last), ret); | |
1589 | return (0); | |
1590 | } | |
ce49121d | 1591 | |
ed05a983 | 1592 | /* NOTREACHED */ |
1593 | return (0); | |
564dd50a | 1594 | } |
f988dce5 | 1595 | #endif /* USE_LASTLOG */ |
b6610e8f | 1596 | |
1597 | #ifdef USE_BTMP | |
1598 | /* | |
1599 | * Logs failed login attempts in _PATH_BTMP if that exists. | |
1600 | * The most common login failure is to give password instead of username. | |
1601 | * So the _PATH_BTMP file checked for the correct permission, so that | |
1602 | * only root can read it. | |
1603 | */ | |
1604 | ||
1605 | void | |
1606 | record_failed_login(const char *username, const char *hostname, | |
1607 | const char *ttyn) | |
1608 | { | |
1609 | int fd; | |
1610 | struct utmp ut; | |
1611 | struct sockaddr_storage from; | |
1612 | size_t fromlen = sizeof(from); | |
1613 | struct sockaddr_in *a4; | |
1614 | struct sockaddr_in6 *a6; | |
1615 | time_t t; | |
1616 | struct stat fst; | |
1617 | ||
1618 | if (geteuid() != 0) | |
1619 | return; | |
1620 | if ((fd = open(_PATH_BTMP, O_WRONLY | O_APPEND)) < 0) { | |
1621 | debug("Unable to open the btmp file %s: %s", _PATH_BTMP, | |
1622 | strerror(errno)); | |
1623 | return; | |
1624 | } | |
1625 | if (fstat(fd, &fst) < 0) { | |
1626 | logit("%s: fstat of %s failed: %s", __func__, _PATH_BTMP, | |
1627 | strerror(errno)); | |
1628 | goto out; | |
1629 | } | |
1630 | if((fst.st_mode & (S_IRWXG | S_IRWXO)) || (fst.st_uid != 0)){ | |
1631 | logit("Excess permission or bad ownership on file %s", | |
1632 | _PATH_BTMP); | |
1633 | goto out; | |
1634 | } | |
1635 | ||
1636 | memset(&ut, 0, sizeof(ut)); | |
1637 | /* strncpy because we don't necessarily want nul termination */ | |
1638 | strncpy(ut.ut_user, username, sizeof(ut.ut_user)); | |
1639 | strlcpy(ut.ut_line, "ssh:notty", sizeof(ut.ut_line)); | |
1640 | ||
1641 | time(&t); | |
1642 | ut.ut_time = t; /* ut_time is not always a time_t */ | |
1643 | ut.ut_type = LOGIN_PROCESS; | |
1644 | ut.ut_pid = getpid(); | |
1645 | ||
1646 | /* strncpy because we don't necessarily want nul termination */ | |
1647 | strncpy(ut.ut_host, hostname, sizeof(ut.ut_host)); | |
1648 | ||
1649 | if (packet_connection_is_on_socket() && | |
1650 | getpeername(packet_get_connection_in(), | |
1651 | (struct sockaddr *)&from, &fromlen) == 0) { | |
1652 | ipv64_normalise_mapped(&from, &fromlen); | |
1653 | if (from.ss_family == AF_INET) { | |
1654 | a4 = (struct sockaddr_in *)&from; | |
1655 | memcpy(&ut.ut_addr, &(a4->sin_addr), | |
1656 | MIN_SIZEOF(ut.ut_addr, a4->sin_addr)); | |
1657 | } | |
1658 | #ifdef HAVE_ADDR_V6_IN_UTMP | |
1659 | if (from.ss_family == AF_INET6) { | |
1660 | a6 = (struct sockaddr_in6 *)&from; | |
1661 | memcpy(&ut.ut_addr_v6, &(a6->sin6_addr), | |
1662 | MIN_SIZEOF(ut.ut_addr_v6, a6->sin6_addr)); | |
1663 | } | |
1664 | #endif | |
1665 | } | |
1666 | ||
1667 | if (atomicio(vwrite, fd, &ut, sizeof(ut)) != sizeof(ut)) | |
1668 | error("Failed to write to %s: %s", _PATH_BTMP, | |
1669 | strerror(errno)); | |
1670 | ||
1671 | out: | |
1672 | close(fd); | |
1673 | } | |
1674 | #endif /* USE_BTMP */ |