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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 | ||
5ccf88cb | 195 | extern Buffer loginmsg; |
196 | ||
5abcdf8e | 197 | /* pick the shortest string */ |
fa64c868 | 198 | #define MIN_SIZEOF(s1,s2) (sizeof(s1) < sizeof(s2) ? sizeof(s1) : sizeof(s2)) |
5abcdf8e | 199 | |
1d7b9b20 | 200 | /** |
201 | ** platform-independent login functions | |
202 | **/ | |
203 | ||
fa64c868 | 204 | /* |
205 | * login_login(struct logininfo *) - Record a login | |
2b87da3b | 206 | * |
5abcdf8e | 207 | * Call with a pointer to a struct logininfo initialised with |
208 | * login_init_entry() or login_alloc_entry() | |
209 | * | |
210 | * Returns: | |
211 | * >0 if successful | |
212 | * 0 on failure (will use OpenSSH's logging facilities for diagnostics) | |
213 | */ | |
564dd50a | 214 | int |
fa64c868 | 215 | login_login(struct logininfo *li) |
564dd50a | 216 | { |
217 | li->type = LTYPE_LOGIN; | |
fa64c868 | 218 | return (login_write(li)); |
564dd50a | 219 | } |
1d7b9b20 | 220 | |
221 | ||
fa64c868 | 222 | /* |
223 | * login_logout(struct logininfo *) - Record a logout | |
5abcdf8e | 224 | * |
225 | * Call as with login_login() | |
226 | * | |
227 | * Returns: | |
228 | * >0 if successful | |
229 | * 0 on failure (will use OpenSSH's logging facilities for diagnostics) | |
230 | */ | |
564dd50a | 231 | int |
232 | login_logout(struct logininfo *li) | |
233 | { | |
234 | li->type = LTYPE_LOGOUT; | |
fa64c868 | 235 | return (login_write(li)); |
1d7b9b20 | 236 | } |
237 | ||
fa64c868 | 238 | /* |
239 | * login_get_lastlog_time(int) - Retrieve the last login time | |
5abcdf8e | 240 | * |
241 | * Retrieve the last login time for the given uid. Will try to use the | |
242 | * system lastlog facilities if they are available, but will fall back | |
243 | * to looking in wtmp/wtmpx if necessary | |
244 | * | |
245 | * Returns: | |
246 | * 0 on failure, or if user has never logged in | |
247 | * Time in seconds from the epoch if successful | |
248 | * | |
249 | * Useful preprocessor symbols: | |
250 | * DISABLE_LASTLOG: If set, *never* even try to retrieve lastlog | |
251 | * info | |
252 | * USE_LASTLOG: If set, indicates the presence of system lastlog | |
253 | * facilities. If this and DISABLE_LASTLOG are not set, | |
254 | * try to retrieve lastlog information from wtmp/wtmpx. | |
255 | */ | |
564dd50a | 256 | unsigned int |
257 | login_get_lastlog_time(const int uid) | |
258 | { | |
259 | struct logininfo li; | |
1d7b9b20 | 260 | |
5abcdf8e | 261 | if (login_get_lastlog(&li, uid)) |
fa64c868 | 262 | return (li.tv_sec); |
5abcdf8e | 263 | else |
fa64c868 | 264 | return (0); |
564dd50a | 265 | } |
1d7b9b20 | 266 | |
fa64c868 | 267 | /* |
268 | * login_get_lastlog(struct logininfo *, int) - Retrieve a lastlog entry | |
5abcdf8e | 269 | * |
270 | * Retrieve a logininfo structure populated (only partially) with | |
271 | * information from the system lastlog data, or from wtmp/wtmpx if no | |
272 | * system lastlog information exists. | |
273 | * | |
274 | * Note this routine must be given a pre-allocated logininfo. | |
275 | * | |
276 | * Returns: | |
277 | * >0: A pointer to your struct logininfo if successful | |
278 | * 0 on failure (will use OpenSSH's logging facilities for diagnostics) | |
5abcdf8e | 279 | */ |
564dd50a | 280 | struct logininfo * |
281 | login_get_lastlog(struct logininfo *li, const int uid) | |
282 | { | |
5abcdf8e | 283 | struct passwd *pw; |
5abcdf8e | 284 | |
dbaa2e87 | 285 | memset(li, '\0', sizeof(*li)); |
1d7b9b20 | 286 | li->uid = uid; |
5abcdf8e | 287 | |
2b87da3b | 288 | /* |
9f32ceb4 | 289 | * If we don't have a 'real' lastlog, we need the username to |
5abcdf8e | 290 | * reliably search wtmp(x) for the last login (see |
2b87da3b | 291 | * wtmp_get_entry().) |
9f32ceb4 | 292 | */ |
5abcdf8e | 293 | pw = getpwuid(uid); |
a05a70ab | 294 | if (pw == NULL) |
a233586b | 295 | fatal("%s: Cannot find account for uid %i", __func__, uid); |
2b87da3b | 296 | |
1bfbb762 | 297 | /* No MIN_SIZEOF here - we absolutely *must not* truncate the |
fa64c868 | 298 | * username (XXX - so check for trunc!) */ |
d8caae24 | 299 | strlcpy(li->username, pw->pw_name, sizeof(li->username)); |
a05a70ab | 300 | |
564dd50a | 301 | if (getlast_entry(li)) |
fa64c868 | 302 | return (li); |
564dd50a | 303 | else |
fa64c868 | 304 | return (NULL); |
1d7b9b20 | 305 | } |
306 | ||
1d7b9b20 | 307 | |
fa64c868 | 308 | /* |
309 | * login_alloc_entry(int, char*, char*, char*) - Allocate and initialise | |
2b87da3b | 310 | * a logininfo structure |
311 | * | |
5abcdf8e | 312 | * This function creates a new struct logininfo, a data structure |
313 | * meant to carry the information required to portably record login info. | |
314 | * | |
315 | * Returns a pointer to a newly created struct logininfo. If memory | |
316 | * allocation fails, the program halts. | |
317 | */ | |
564dd50a | 318 | struct |
319 | logininfo *login_alloc_entry(int pid, const char *username, | |
fa64c868 | 320 | const char *hostname, const char *line) |
564dd50a | 321 | { |
322 | struct logininfo *newli; | |
1d7b9b20 | 323 | |
fa64c868 | 324 | newli = xmalloc(sizeof(*newli)); |
325 | login_init_entry(newli, pid, username, hostname, line); | |
326 | return (newli); | |
1d7b9b20 | 327 | } |
328 | ||
329 | ||
5abcdf8e | 330 | /* login_free_entry(struct logininfo *) - free struct memory */ |
1d7b9b20 | 331 | void |
564dd50a | 332 | login_free_entry(struct logininfo *li) |
333 | { | |
334 | xfree(li); | |
1d7b9b20 | 335 | } |
336 | ||
337 | ||
5abcdf8e | 338 | /* login_init_entry(struct logininfo *, int, char*, char*, char*) |
339 | * - initialise a struct logininfo | |
2b87da3b | 340 | * |
5abcdf8e | 341 | * Populates a new struct logininfo, a data structure meant to carry |
342 | * the information required to portably record login info. | |
343 | * | |
344 | * Returns: 1 | |
345 | */ | |
564dd50a | 346 | int |
2b87da3b | 347 | login_init_entry(struct logininfo *li, int pid, const char *username, |
fa64c868 | 348 | const char *hostname, const char *line) |
564dd50a | 349 | { |
d8caae24 | 350 | struct passwd *pw; |
2b87da3b | 351 | |
dbaa2e87 | 352 | memset(li, 0, sizeof(*li)); |
2b87da3b | 353 | |
564dd50a | 354 | li->pid = pid; |
d8caae24 | 355 | |
564dd50a | 356 | /* set the line information */ |
357 | if (line) | |
358 | line_fullname(li->line, line, sizeof(li->line)); | |
1d7b9b20 | 359 | |
d8caae24 | 360 | if (username) { |
564dd50a | 361 | strlcpy(li->username, username, sizeof(li->username)); |
d8caae24 | 362 | pw = getpwnam(li->username); |
fa64c868 | 363 | if (pw == NULL) { |
a233586b | 364 | fatal("%s: Cannot find user \"%s\"", __func__, |
fa64c868 | 365 | li->username); |
366 | } | |
d8caae24 | 367 | li->uid = pw->pw_uid; |
368 | } | |
a05a70ab | 369 | |
564dd50a | 370 | if (hostname) |
371 | strlcpy(li->hostname, hostname, sizeof(li->hostname)); | |
d8caae24 | 372 | |
fa64c868 | 373 | return (1); |
1d7b9b20 | 374 | } |
375 | ||
fa64c868 | 376 | /* |
377 | * login_set_current_time(struct logininfo *) - set the current time | |
5abcdf8e | 378 | * |
379 | * Set the current time in a logininfo structure. This function is | |
380 | * meant to eliminate the need to deal with system dependencies for | |
381 | * time handling. | |
382 | */ | |
1d7b9b20 | 383 | void |
564dd50a | 384 | login_set_current_time(struct logininfo *li) |
385 | { | |
1d7b9b20 | 386 | struct timeval tv; |
387 | ||
388 | gettimeofday(&tv, NULL); | |
2b87da3b | 389 | |
d8caae24 | 390 | li->tv_sec = tv.tv_sec; |
391 | li->tv_usec = tv.tv_usec; | |
1d7b9b20 | 392 | } |
393 | ||
564dd50a | 394 | /* copy a sockaddr_* into our logininfo */ |
1d7b9b20 | 395 | void |
564dd50a | 396 | login_set_addr(struct logininfo *li, const struct sockaddr *sa, |
fa64c868 | 397 | const unsigned int sa_size) |
564dd50a | 398 | { |
399 | unsigned int bufsize = sa_size; | |
400 | ||
401 | /* make sure we don't overrun our union */ | |
402 | if (sizeof(li->hostaddr) < sa_size) | |
403 | bufsize = sizeof(li->hostaddr); | |
404 | ||
fa64c868 | 405 | memcpy(&li->hostaddr.sa, sa, bufsize); |
1d7b9b20 | 406 | } |
1d7b9b20 | 407 | |
564dd50a | 408 | |
409 | /** | |
410 | ** login_write: Call low-level recording functions based on autoconf | |
411 | ** results | |
412 | **/ | |
1d7b9b20 | 413 | int |
fa64c868 | 414 | login_write(struct logininfo *li) |
564dd50a | 415 | { |
3c62e7eb | 416 | #ifndef HAVE_CYGWIN |
fa64c868 | 417 | if (geteuid() != 0) { |
418 | logit("Attempt to write login records by non-root user (aborting)"); | |
419 | return (1); | |
1d7b9b20 | 420 | } |
3c62e7eb | 421 | #endif |
a05a70ab | 422 | |
1d7b9b20 | 423 | /* set the timestamp */ |
424 | login_set_current_time(li); | |
425 | #ifdef USE_LOGIN | |
426 | syslogin_write_entry(li); | |
427 | #endif | |
428 | #ifdef USE_LASTLOG | |
fa64c868 | 429 | if (li->type == LTYPE_LOGIN) |
1d7b9b20 | 430 | lastlog_write_entry(li); |
1d7b9b20 | 431 | #endif |
432 | #ifdef USE_UTMP | |
433 | utmp_write_entry(li); | |
434 | #endif | |
435 | #ifdef USE_WTMP | |
436 | wtmp_write_entry(li); | |
437 | #endif | |
438 | #ifdef USE_UTMPX | |
439 | utmpx_write_entry(li); | |
440 | #endif | |
441 | #ifdef USE_WTMPX | |
442 | wtmpx_write_entry(li); | |
f5ed3301 | 443 | #endif |
444 | #ifdef CUSTOM_SYS_AUTH_RECORD_LOGIN | |
445 | if (li->type == LTYPE_LOGIN && | |
5ccf88cb | 446 | !sys_auth_record_login(li->username,li->hostname,li->line, &loginmsg)) |
f5ed3301 | 447 | logit("Writing login record failed for %s", li->username); |
c00e4d75 | 448 | #endif |
6039eeef | 449 | #ifdef SSH_AUDIT_EVENTS |
c00e4d75 | 450 | if (li->type == LTYPE_LOGIN) |
451 | audit_session_open(li->line); | |
452 | else if (li->type == LTYPE_LOGOUT) | |
453 | audit_session_close(li->line); | |
1d7b9b20 | 454 | #endif |
fa64c868 | 455 | return (0); |
1d7b9b20 | 456 | } |
457 | ||
7e2d5fa4 | 458 | #ifdef LOGIN_NEEDS_UTMPX |
459 | int | |
460 | login_utmp_only(struct logininfo *li) | |
461 | { | |
aff51935 | 462 | li->type = LTYPE_LOGIN; |
9e127e27 | 463 | login_set_current_time(li); |
7e2d5fa4 | 464 | # ifdef USE_UTMP |
465 | utmp_write_entry(li); | |
466 | # endif | |
467 | # ifdef USE_WTMP | |
468 | wtmp_write_entry(li); | |
469 | # endif | |
470 | # ifdef USE_UTMPX | |
471 | utmpx_write_entry(li); | |
472 | # endif | |
473 | # ifdef USE_WTMPX | |
474 | wtmpx_write_entry(li); | |
475 | # endif | |
fa64c868 | 476 | return (0); |
7e2d5fa4 | 477 | } |
478 | #endif | |
479 | ||
564dd50a | 480 | /** |
481 | ** getlast_entry: Call low-level functions to retrieve the last login | |
482 | ** time. | |
483 | **/ | |
1d7b9b20 | 484 | |
564dd50a | 485 | /* take the uid in li and return the last login time */ |
1d7b9b20 | 486 | int |
564dd50a | 487 | getlast_entry(struct logininfo *li) |
488 | { | |
489 | #ifdef USE_LASTLOG | |
9f32ceb4 | 490 | return(lastlog_get_entry(li)); |
a05a70ab | 491 | #else /* !USE_LASTLOG */ |
1d7b9b20 | 492 | |
fa64c868 | 493 | #if defined(DISABLE_LASTLOG) |
2b87da3b | 494 | /* On some systems we shouldn't even try to obtain last login |
3f45f1c3 | 495 | * time, e.g. AIX */ |
fa64c868 | 496 | return (0); |
497 | # elif defined(USE_WTMP) && \ | |
498 | (defined(HAVE_TIME_IN_UTMP) || defined(HAVE_TV_IN_UTMP)) | |
564dd50a | 499 | /* retrieve last login time from utmp */ |
a05a70ab | 500 | return (wtmp_get_entry(li)); |
fa64c868 | 501 | # elif defined(USE_WTMPX) && \ |
502 | (defined(HAVE_TIME_IN_UTMPX) || defined(HAVE_TV_IN_UTMPX)) | |
564dd50a | 503 | /* If wtmp isn't available, try wtmpx */ |
a05a70ab | 504 | return (wtmpx_get_entry(li)); |
fa64c868 | 505 | # else |
564dd50a | 506 | /* Give up: No means of retrieving last login time */ |
fa64c868 | 507 | return (0); |
2b87da3b | 508 | # endif /* DISABLE_LASTLOG */ |
a05a70ab | 509 | #endif /* USE_LASTLOG */ |
564dd50a | 510 | } |
1d7b9b20 | 511 | |
512 | ||
1d7b9b20 | 513 | |
514 | /* | |
564dd50a | 515 | * 'line' string utility functions |
516 | * | |
517 | * These functions process the 'line' string into one of three forms: | |
518 | * | |
1d7b9b20 | 519 | * 1. The full filename (including '/dev') |
520 | * 2. The stripped name (excluding '/dev') | |
564dd50a | 521 | * 3. The abbreviated name (e.g. /dev/ttyp00 -> yp00 |
522 | * /dev/pts/1 -> ts/1 ) | |
1d7b9b20 | 523 | * |
524 | * Form 3 is used on some systems to identify a .tmp.? entry when | |
525 | * attempting to remove it. Typically both addition and removal is | |
564dd50a | 526 | * performed by one application - say, sshd - so as long as the choice |
527 | * uniquely identifies a terminal it's ok. | |
1d7b9b20 | 528 | */ |
529 | ||
530 | ||
fa64c868 | 531 | /* |
532 | * line_fullname(): add the leading '/dev/' if it doesn't exist make | |
533 | * sure dst has enough space, if not just copy src (ugh) | |
534 | */ | |
1d7b9b20 | 535 | char * |
564dd50a | 536 | line_fullname(char *dst, const char *src, int dstsize) |
537 | { | |
1d7b9b20 | 538 | memset(dst, '\0', dstsize); |
fa64c868 | 539 | if ((strncmp(src, "/dev/", 5) == 0) || (dstsize < (strlen(src) + 5))) |
1d7b9b20 | 540 | strlcpy(dst, src, dstsize); |
fa64c868 | 541 | else { |
a4d05724 | 542 | strlcpy(dst, "/dev/", dstsize); |
1d7b9b20 | 543 | strlcat(dst, src, dstsize); |
544 | } | |
fa64c868 | 545 | return (dst); |
1d7b9b20 | 546 | } |
547 | ||
564dd50a | 548 | /* line_stripname(): strip the leading '/dev' if it exists, return dst */ |
1d7b9b20 | 549 | char * |
564dd50a | 550 | line_stripname(char *dst, const char *src, int dstsize) |
551 | { | |
1d7b9b20 | 552 | memset(dst, '\0', dstsize); |
553 | if (strncmp(src, "/dev/", 5) == 0) | |
89d7510a | 554 | strlcpy(dst, src + 5, dstsize); |
1d7b9b20 | 555 | else |
556 | strlcpy(dst, src, dstsize); | |
fa64c868 | 557 | return (dst); |
564dd50a | 558 | } |
559 | ||
fa64c868 | 560 | /* |
561 | * line_abbrevname(): Return the abbreviated (usually four-character) | |
564dd50a | 562 | * form of the line (Just use the last <dstsize> characters of the |
563 | * full name.) | |
564 | * | |
565 | * NOTE: use strncpy because we do NOT necessarily want zero | |
fa64c868 | 566 | * termination |
567 | */ | |
1d7b9b20 | 568 | char * |
2b87da3b | 569 | line_abbrevname(char *dst, const char *src, int dstsize) |
a05a70ab | 570 | { |
571 | size_t len; | |
2b87da3b | 572 | |
1d7b9b20 | 573 | memset(dst, '\0', dstsize); |
2b87da3b | 574 | |
daaff4d5 | 575 | /* Always skip prefix if present */ |
576 | if (strncmp(src, "/dev/", 5) == 0) | |
577 | src += 5; | |
2b87da3b | 578 | |
0e8f4eba | 579 | #ifdef WITH_ABBREV_NO_TTY |
580 | if (strncmp(src, "tty", 3) == 0) | |
581 | src += 3; | |
582 | #endif | |
583 | ||
a05a70ab | 584 | len = strlen(src); |
585 | ||
daaff4d5 | 586 | if (len > 0) { |
587 | if (((int)len - dstsize) > 0) | |
588 | src += ((int)len - dstsize); | |
589 | ||
590 | /* note: _don't_ change this to strlcpy */ | |
2b87da3b | 591 | strncpy(dst, src, (size_t)dstsize); |
a05a70ab | 592 | } |
2b87da3b | 593 | |
fa64c868 | 594 | return (dst); |
1d7b9b20 | 595 | } |
596 | ||
1d7b9b20 | 597 | /** |
598 | ** utmp utility functions | |
564dd50a | 599 | ** |
600 | ** These functions manipulate struct utmp, taking system differences | |
601 | ** into account. | |
1d7b9b20 | 602 | **/ |
603 | ||
604 | #if defined(USE_UTMP) || defined (USE_WTMP) || defined (USE_LOGIN) | |
605 | ||
1d7b9b20 | 606 | /* build the utmp structure */ |
607 | void | |
564dd50a | 608 | set_utmp_time(struct logininfo *li, struct utmp *ut) |
609 | { | |
fa64c868 | 610 | # if defined(HAVE_TV_IN_UTMP) |
1d7b9b20 | 611 | ut->ut_tv.tv_sec = li->tv_sec; |
612 | ut->ut_tv.tv_usec = li->tv_usec; | |
fa64c868 | 613 | # elif defined(HAVE_TIME_IN_UTMP) |
1d7b9b20 | 614 | ut->ut_time = li->tv_sec; |
a05a70ab | 615 | # endif |
1d7b9b20 | 616 | } |
617 | ||
618 | void | |
619 | construct_utmp(struct logininfo *li, | |
564dd50a | 620 | struct utmp *ut) |
621 | { | |
9746ee4b | 622 | # ifdef HAVE_ADDR_V6_IN_UTMP |
623 | struct sockaddr_in6 *sa6; | |
fa64c868 | 624 | # endif |
625 | ||
dbaa2e87 | 626 | memset(ut, '\0', sizeof(*ut)); |
5abcdf8e | 627 | |
628 | /* First fill out fields used for both logins and logouts */ | |
629 | ||
a05a70ab | 630 | # ifdef HAVE_ID_IN_UTMP |
1d7b9b20 | 631 | line_abbrevname(ut->ut_id, li->line, sizeof(ut->ut_id)); |
a05a70ab | 632 | # endif |
1d7b9b20 | 633 | |
a05a70ab | 634 | # ifdef HAVE_TYPE_IN_UTMP |
5abcdf8e | 635 | /* This is done here to keep utmp constants out of struct logininfo */ |
1d7b9b20 | 636 | switch (li->type) { |
637 | case LTYPE_LOGIN: | |
638 | ut->ut_type = USER_PROCESS; | |
ef51930f | 639 | #ifdef _UNICOS |
1a23ac2c | 640 | cray_set_tmpdir(ut); |
641 | #endif | |
1d7b9b20 | 642 | break; |
643 | case LTYPE_LOGOUT: | |
644 | ut->ut_type = DEAD_PROCESS; | |
ef51930f | 645 | #ifdef _UNICOS |
1a23ac2c | 646 | cray_retain_utmp(ut, li->pid); |
647 | #endif | |
1d7b9b20 | 648 | break; |
649 | } | |
a05a70ab | 650 | # endif |
5abcdf8e | 651 | set_utmp_time(li, ut); |
1d7b9b20 | 652 | |
5abcdf8e | 653 | line_stripname(ut->ut_line, li->line, sizeof(ut->ut_line)); |
a05a70ab | 654 | |
655 | # ifdef HAVE_PID_IN_UTMP | |
1d7b9b20 | 656 | ut->ut_pid = li->pid; |
a05a70ab | 657 | # endif |
5abcdf8e | 658 | |
659 | /* If we're logging out, leave all other fields blank */ | |
660 | if (li->type == LTYPE_LOGOUT) | |
fa64c868 | 661 | return; |
5abcdf8e | 662 | |
a05a70ab | 663 | /* |
664 | * These fields are only used when logging in, and are blank | |
2b87da3b | 665 | * for logouts. |
a05a70ab | 666 | */ |
5abcdf8e | 667 | |
668 | /* Use strncpy because we don't necessarily want null termination */ | |
fa64c868 | 669 | strncpy(ut->ut_name, li->username, |
670 | MIN_SIZEOF(ut->ut_name, li->username)); | |
a05a70ab | 671 | # ifdef HAVE_HOST_IN_UTMP |
fa64c868 | 672 | strncpy(ut->ut_host, li->hostname, |
673 | MIN_SIZEOF(ut->ut_host, li->hostname)); | |
a05a70ab | 674 | # endif |
675 | # ifdef HAVE_ADDR_IN_UTMP | |
564dd50a | 676 | /* this is just a 32-bit IP address */ |
677 | if (li->hostaddr.sa.sa_family == AF_INET) | |
678 | ut->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr; | |
2b87da3b | 679 | # endif |
9746ee4b | 680 | # ifdef HAVE_ADDR_V6_IN_UTMP |
681 | /* this is just a 128-bit IPv6 address */ | |
682 | if (li->hostaddr.sa.sa_family == AF_INET6) { | |
683 | sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa); | |
684 | memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16); | |
685 | if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) { | |
686 | ut->ut_addr_v6[0] = ut->ut_addr_v6[3]; | |
687 | ut->ut_addr_v6[1] = 0; | |
688 | ut->ut_addr_v6[2] = 0; | |
689 | ut->ut_addr_v6[3] = 0; | |
690 | } | |
691 | } | |
692 | # endif | |
564dd50a | 693 | } |
a05a70ab | 694 | #endif /* USE_UTMP || USE_WTMP || USE_LOGIN */ |
564dd50a | 695 | |
1d7b9b20 | 696 | /** |
697 | ** utmpx utility functions | |
564dd50a | 698 | ** |
699 | ** These functions manipulate struct utmpx, accounting for system | |
700 | ** variations. | |
1d7b9b20 | 701 | **/ |
702 | ||
703 | #if defined(USE_UTMPX) || defined (USE_WTMPX) | |
1d7b9b20 | 704 | /* build the utmpx structure */ |
705 | void | |
564dd50a | 706 | set_utmpx_time(struct logininfo *li, struct utmpx *utx) |
707 | { | |
fa64c868 | 708 | # if defined(HAVE_TV_IN_UTMPX) |
1d7b9b20 | 709 | utx->ut_tv.tv_sec = li->tv_sec; |
710 | utx->ut_tv.tv_usec = li->tv_usec; | |
fa64c868 | 711 | # elif defined(HAVE_TIME_IN_UTMPX) |
1d7b9b20 | 712 | utx->ut_time = li->tv_sec; |
fa64c868 | 713 | # endif |
1d7b9b20 | 714 | } |
715 | ||
716 | void | |
564dd50a | 717 | construct_utmpx(struct logininfo *li, struct utmpx *utx) |
718 | { | |
9746ee4b | 719 | # ifdef HAVE_ADDR_V6_IN_UTMP |
720 | struct sockaddr_in6 *sa6; | |
721 | # endif | |
dbaa2e87 | 722 | memset(utx, '\0', sizeof(*utx)); |
fa64c868 | 723 | |
daaff4d5 | 724 | # ifdef HAVE_ID_IN_UTMPX |
1d7b9b20 | 725 | line_abbrevname(utx->ut_id, li->line, sizeof(utx->ut_id)); |
daaff4d5 | 726 | # endif |
1d7b9b20 | 727 | |
728 | /* this is done here to keep utmp constants out of loginrec.h */ | |
729 | switch (li->type) { | |
730 | case LTYPE_LOGIN: | |
731 | utx->ut_type = USER_PROCESS; | |
732 | break; | |
733 | case LTYPE_LOGOUT: | |
734 | utx->ut_type = DEAD_PROCESS; | |
735 | break; | |
736 | } | |
1d7b9b20 | 737 | line_stripname(utx->ut_line, li->line, sizeof(utx->ut_line)); |
1d7b9b20 | 738 | set_utmpx_time(li, utx); |
5abcdf8e | 739 | utx->ut_pid = li->pid; |
fa64c868 | 740 | |
f3837bc6 | 741 | /* strncpy(): Don't necessarily want null termination */ |
fa64c868 | 742 | strncpy(utx->ut_name, li->username, |
743 | MIN_SIZEOF(utx->ut_name, li->username)); | |
5abcdf8e | 744 | |
745 | if (li->type == LTYPE_LOGOUT) | |
746 | return; | |
747 | ||
a05a70ab | 748 | /* |
749 | * These fields are only used when logging in, and are blank | |
2b87da3b | 750 | * for logouts. |
a05a70ab | 751 | */ |
5abcdf8e | 752 | |
a05a70ab | 753 | # ifdef HAVE_HOST_IN_UTMPX |
fa64c868 | 754 | strncpy(utx->ut_host, li->hostname, |
755 | MIN_SIZEOF(utx->ut_host, li->hostname)); | |
a05a70ab | 756 | # endif |
757 | # ifdef HAVE_ADDR_IN_UTMPX | |
764d4113 | 758 | /* this is just a 32-bit IP address */ |
759 | if (li->hostaddr.sa.sa_family == AF_INET) | |
760 | utx->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr; | |
a05a70ab | 761 | # endif |
9746ee4b | 762 | # ifdef HAVE_ADDR_V6_IN_UTMP |
763 | /* this is just a 128-bit IPv6 address */ | |
764 | if (li->hostaddr.sa.sa_family == AF_INET6) { | |
765 | sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa); | |
766 | memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16); | |
767 | if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) { | |
768 | ut->ut_addr_v6[0] = ut->ut_addr_v6[3]; | |
769 | ut->ut_addr_v6[1] = 0; | |
770 | ut->ut_addr_v6[2] = 0; | |
771 | ut->ut_addr_v6[3] = 0; | |
772 | } | |
773 | } | |
774 | # endif | |
a05a70ab | 775 | # ifdef HAVE_SYSLEN_IN_UTMPX |
5abcdf8e | 776 | /* ut_syslen is the length of the utx_host string */ |
777 | utx->ut_syslen = MIN(strlen(li->hostname), sizeof(utx->ut_host)); | |
a05a70ab | 778 | # endif |
564dd50a | 779 | } |
a05a70ab | 780 | #endif /* USE_UTMPX || USE_WTMPX */ |
1d7b9b20 | 781 | |
782 | /** | |
564dd50a | 783 | ** Low-level utmp functions |
1d7b9b20 | 784 | **/ |
785 | ||
786 | /* FIXME: (ATL) utmp_write_direct needs testing */ | |
1d7b9b20 | 787 | #ifdef USE_UTMP |
788 | ||
1d7b9b20 | 789 | /* if we can, use pututline() etc. */ |
a05a70ab | 790 | # if !defined(DISABLE_PUTUTLINE) && defined(HAVE_SETUTENT) && \ |
791 | defined(HAVE_PUTUTLINE) | |
1d7b9b20 | 792 | # define UTMP_USE_LIBRARY |
a05a70ab | 793 | # endif |
1d7b9b20 | 794 | |
795 | ||
796 | /* write a utmp entry with the system's help (pututline() and pals) */ | |
a05a70ab | 797 | # ifdef UTMP_USE_LIBRARY |
1d7b9b20 | 798 | static int |
564dd50a | 799 | utmp_write_library(struct logininfo *li, struct utmp *ut) |
800 | { | |
1d7b9b20 | 801 | setutent(); |
802 | pututline(ut); | |
a05a70ab | 803 | # ifdef HAVE_ENDUTENT |
1d7b9b20 | 804 | endutent(); |
a05a70ab | 805 | # endif |
fa64c868 | 806 | return (1); |
564dd50a | 807 | } |
a05a70ab | 808 | # else /* UTMP_USE_LIBRARY */ |
1d7b9b20 | 809 | |
fa64c868 | 810 | /* |
811 | * Write a utmp entry direct to the file | |
812 | * This is a slightly modification of code in OpenBSD's login.c | |
813 | */ | |
1d7b9b20 | 814 | static int |
564dd50a | 815 | utmp_write_direct(struct logininfo *li, struct utmp *ut) |
816 | { | |
1d7b9b20 | 817 | struct utmp old_ut; |
818 | register int fd; | |
819 | int tty; | |
820 | ||
5abcdf8e | 821 | /* FIXME: (ATL) ttyslot() needs local implementation */ |
dbaa2e87 | 822 | |
698d107e | 823 | #if defined(HAVE_GETTTYENT) |
fa64c868 | 824 | struct ttyent *ty; |
dbaa2e87 | 825 | |
826 | tty=0; | |
dbaa2e87 | 827 | setttyent(); |
fa64c868 | 828 | while (NULL != (ty = getttyent())) { |
dbaa2e87 | 829 | tty++; |
830 | if (!strncmp(ty->ty_name, ut->ut_line, sizeof(ut->ut_line))) | |
831 | break; | |
832 | } | |
833 | endttyent(); | |
834 | ||
fa64c868 | 835 | if (NULL == ty) { |
5f12e050 | 836 | logit("%s: tty not found", __func__); |
837 | return (0); | |
dbaa2e87 | 838 | } |
839 | #else /* FIXME */ | |
840 | ||
1d7b9b20 | 841 | tty = ttyslot(); /* seems only to work for /dev/ttyp? style names */ |
842 | ||
698d107e | 843 | #endif /* HAVE_GETTTYENT */ |
dbaa2e87 | 844 | |
1d7b9b20 | 845 | if (tty > 0 && (fd = open(UTMP_FILE, O_RDWR|O_CREAT, 0644)) >= 0) { |
5f12e050 | 846 | off_t pos, ret; |
847 | ||
848 | pos = (off_t)tty * sizeof(struct utmp); | |
849 | if ((ret = lseek(fd, pos, SEEK_SET)) == -1) { | |
f6d20d59 | 850 | logit("%s: lseek: %s", __func__, strerror(errno)); |
5f12e050 | 851 | return (0); |
852 | } | |
853 | if (ret != pos) { | |
f6d20d59 | 854 | logit("%s: Couldn't seek to tty %d slot in %s", |
855 | __func__, tty, UTMP_FILE); | |
5f12e050 | 856 | return (0); |
857 | } | |
1d7b9b20 | 858 | /* |
859 | * Prevent luser from zero'ing out ut_host. | |
860 | * If the new ut_line is empty but the old one is not | |
dc2a6d09 | 861 | * and ut_line and ut_name match, preserve the old ut_line. |
1d7b9b20 | 862 | */ |
2b87da3b | 863 | if (atomicio(read, fd, &old_ut, sizeof(old_ut)) == sizeof(old_ut) && |
fa64c868 | 864 | (ut->ut_host[0] == '\0') && (old_ut.ut_host[0] != '\0') && |
865 | (strncmp(old_ut.ut_line, ut->ut_line, sizeof(ut->ut_line)) == 0) && | |
866 | (strncmp(old_ut.ut_name, ut->ut_name, sizeof(ut->ut_name)) == 0)) | |
867 | memcpy(ut->ut_host, old_ut.ut_host, sizeof(ut->ut_host)); | |
2b87da3b | 868 | |
5f12e050 | 869 | if ((ret = lseek(fd, pos, SEEK_SET)) == -1) { |
f6d20d59 | 870 | logit("%s: lseek: %s", __func__, strerror(errno)); |
5f12e050 | 871 | return (0); |
872 | } | |
873 | if (ret != pos) { | |
f6d20d59 | 874 | logit("%s: Couldn't seek to tty %d slot in %s", |
5f12e050 | 875 | __func__, tty, UTMP_FILE); |
876 | return (0); | |
877 | } | |
fa64c868 | 878 | if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) { |
5f12e050 | 879 | logit("%s: error writing %s: %s", __func__, |
5abcdf8e | 880 | UTMP_FILE, strerror(errno)); |
fa64c868 | 881 | } |
2b87da3b | 882 | |
fa64c868 | 883 | close(fd); |
884 | return (1); | |
9f32ceb4 | 885 | } else { |
fa64c868 | 886 | return (0); |
9f32ceb4 | 887 | } |
564dd50a | 888 | } |
a05a70ab | 889 | # endif /* UTMP_USE_LIBRARY */ |
1d7b9b20 | 890 | |
891 | static int | |
564dd50a | 892 | utmp_perform_login(struct logininfo *li) |
893 | { | |
1d7b9b20 | 894 | struct utmp ut; |
895 | ||
896 | construct_utmp(li, &ut); | |
a05a70ab | 897 | # ifdef UTMP_USE_LIBRARY |
1d7b9b20 | 898 | if (!utmp_write_library(li, &ut)) { |
a233586b | 899 | logit("%s: utmp_write_library() failed", __func__); |
fa64c868 | 900 | return (0); |
1d7b9b20 | 901 | } |
a05a70ab | 902 | # else |
1d7b9b20 | 903 | if (!utmp_write_direct(li, &ut)) { |
a233586b | 904 | logit("%s: utmp_write_direct() failed", __func__); |
fa64c868 | 905 | return (0); |
1d7b9b20 | 906 | } |
a05a70ab | 907 | # endif |
fa64c868 | 908 | return (1); |
564dd50a | 909 | } |
1d7b9b20 | 910 | |
911 | ||
912 | static int | |
564dd50a | 913 | utmp_perform_logout(struct logininfo *li) |
914 | { | |
1d7b9b20 | 915 | struct utmp ut; |
916 | ||
5abcdf8e | 917 | construct_utmp(li, &ut); |
a05a70ab | 918 | # ifdef UTMP_USE_LIBRARY |
5abcdf8e | 919 | if (!utmp_write_library(li, &ut)) { |
a233586b | 920 | logit("%s: utmp_write_library() failed", __func__); |
fa64c868 | 921 | return (0); |
5abcdf8e | 922 | } |
a05a70ab | 923 | # else |
5abcdf8e | 924 | if (!utmp_write_direct(li, &ut)) { |
a233586b | 925 | logit("%s: utmp_write_direct() failed", __func__); |
fa64c868 | 926 | return (0); |
5abcdf8e | 927 | } |
a05a70ab | 928 | # endif |
fa64c868 | 929 | return (1); |
564dd50a | 930 | } |
1d7b9b20 | 931 | |
932 | ||
933 | int | |
564dd50a | 934 | utmp_write_entry(struct logininfo *li) |
935 | { | |
1d7b9b20 | 936 | switch(li->type) { |
937 | case LTYPE_LOGIN: | |
fa64c868 | 938 | return (utmp_perform_login(li)); |
1d7b9b20 | 939 | |
940 | case LTYPE_LOGOUT: | |
fa64c868 | 941 | return (utmp_perform_logout(li)); |
1d7b9b20 | 942 | |
943 | default: | |
a233586b | 944 | logit("%s: invalid type field", __func__); |
fa64c868 | 945 | return (0); |
1d7b9b20 | 946 | } |
564dd50a | 947 | } |
a05a70ab | 948 | #endif /* USE_UTMP */ |
1d7b9b20 | 949 | |
950 | ||
951 | /** | |
564dd50a | 952 | ** Low-level utmpx functions |
1d7b9b20 | 953 | **/ |
954 | ||
955 | /* not much point if we don't want utmpx entries */ | |
956 | #ifdef USE_UTMPX | |
957 | ||
1d7b9b20 | 958 | /* if we have the wherewithall, use pututxline etc. */ |
a05a70ab | 959 | # if !defined(DISABLE_PUTUTXLINE) && defined(HAVE_SETUTXENT) && \ |
960 | defined(HAVE_PUTUTXLINE) | |
1d7b9b20 | 961 | # define UTMPX_USE_LIBRARY |
a05a70ab | 962 | # endif |
1d7b9b20 | 963 | |
964 | ||
965 | /* write a utmpx entry with the system's help (pututxline() and pals) */ | |
a05a70ab | 966 | # ifdef UTMPX_USE_LIBRARY |
1d7b9b20 | 967 | static int |
564dd50a | 968 | utmpx_write_library(struct logininfo *li, struct utmpx *utx) |
969 | { | |
1d7b9b20 | 970 | setutxent(); |
971 | pututxline(utx); | |
972 | ||
a05a70ab | 973 | # ifdef HAVE_ENDUTXENT |
1d7b9b20 | 974 | endutxent(); |
a05a70ab | 975 | # endif |
fa64c868 | 976 | return (1); |
564dd50a | 977 | } |
1d7b9b20 | 978 | |
a05a70ab | 979 | # else /* UTMPX_USE_LIBRARY */ |
1d7b9b20 | 980 | |
981 | /* write a utmp entry direct to the file */ | |
982 | static int | |
564dd50a | 983 | utmpx_write_direct(struct logininfo *li, struct utmpx *utx) |
2b87da3b | 984 | { |
a233586b | 985 | logit("%s: not implemented!", __func__); |
fa64c868 | 986 | return (0); |
564dd50a | 987 | } |
a05a70ab | 988 | # endif /* UTMPX_USE_LIBRARY */ |
1d7b9b20 | 989 | |
990 | static int | |
564dd50a | 991 | utmpx_perform_login(struct logininfo *li) |
992 | { | |
1d7b9b20 | 993 | struct utmpx utx; |
994 | ||
995 | construct_utmpx(li, &utx); | |
a05a70ab | 996 | # ifdef UTMPX_USE_LIBRARY |
1d7b9b20 | 997 | if (!utmpx_write_library(li, &utx)) { |
a233586b | 998 | logit("%s: utmp_write_library() failed", __func__); |
fa64c868 | 999 | return (0); |
1d7b9b20 | 1000 | } |
a05a70ab | 1001 | # else |
1d7b9b20 | 1002 | if (!utmpx_write_direct(li, &ut)) { |
a233586b | 1003 | logit("%s: utmp_write_direct() failed", __func__); |
fa64c868 | 1004 | return (0); |
1d7b9b20 | 1005 | } |
a05a70ab | 1006 | # endif |
fa64c868 | 1007 | return (1); |
564dd50a | 1008 | } |
1d7b9b20 | 1009 | |
1010 | ||
1011 | static int | |
564dd50a | 1012 | utmpx_perform_logout(struct logininfo *li) |
1013 | { | |
1d7b9b20 | 1014 | struct utmpx utx; |
1015 | ||
f3837bc6 | 1016 | construct_utmpx(li, &utx); |
a05a70ab | 1017 | # ifdef HAVE_ID_IN_UTMPX |
1d7b9b20 | 1018 | line_abbrevname(utx.ut_id, li->line, sizeof(utx.ut_id)); |
a05a70ab | 1019 | # endif |
1020 | # ifdef HAVE_TYPE_IN_UTMPX | |
1d7b9b20 | 1021 | utx.ut_type = DEAD_PROCESS; |
a05a70ab | 1022 | # endif |
1d7b9b20 | 1023 | |
a05a70ab | 1024 | # ifdef UTMPX_USE_LIBRARY |
1d7b9b20 | 1025 | utmpx_write_library(li, &utx); |
a05a70ab | 1026 | # else |
1d7b9b20 | 1027 | utmpx_write_direct(li, &utx); |
a05a70ab | 1028 | # endif |
fa64c868 | 1029 | return (1); |
564dd50a | 1030 | } |
1d7b9b20 | 1031 | |
1d7b9b20 | 1032 | int |
564dd50a | 1033 | utmpx_write_entry(struct logininfo *li) |
1034 | { | |
1d7b9b20 | 1035 | switch(li->type) { |
1036 | case LTYPE_LOGIN: | |
fa64c868 | 1037 | return (utmpx_perform_login(li)); |
1d7b9b20 | 1038 | case LTYPE_LOGOUT: |
fa64c868 | 1039 | return (utmpx_perform_logout(li)); |
1d7b9b20 | 1040 | default: |
a233586b | 1041 | logit("%s: invalid type field", __func__); |
fa64c868 | 1042 | return (0); |
1d7b9b20 | 1043 | } |
564dd50a | 1044 | } |
a05a70ab | 1045 | #endif /* USE_UTMPX */ |
1d7b9b20 | 1046 | |
1047 | ||
1048 | /** | |
564dd50a | 1049 | ** Low-level wtmp functions |
1d7b9b20 | 1050 | **/ |
1051 | ||
2b87da3b | 1052 | #ifdef USE_WTMP |
1d7b9b20 | 1053 | |
fa64c868 | 1054 | /* |
1055 | * Write a wtmp entry direct to the end of the file | |
1056 | * This is a slight modification of code in OpenBSD's logwtmp.c | |
1057 | */ | |
1d7b9b20 | 1058 | static int |
564dd50a | 1059 | wtmp_write(struct logininfo *li, struct utmp *ut) |
1060 | { | |
1d7b9b20 | 1061 | struct stat buf; |
1062 | int fd, ret = 1; | |
1063 | ||
1064 | if ((fd = open(WTMP_FILE, O_WRONLY|O_APPEND, 0)) < 0) { | |
a233586b | 1065 | logit("%s: problem writing %s: %s", __func__, |
1d7b9b20 | 1066 | WTMP_FILE, strerror(errno)); |
fa64c868 | 1067 | return (0); |
1d7b9b20 | 1068 | } |
2b87da3b | 1069 | if (fstat(fd, &buf) == 0) |
d72f7b79 | 1070 | if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) { |
1d7b9b20 | 1071 | ftruncate(fd, buf.st_size); |
a233586b | 1072 | logit("%s: problem writing %s: %s", __func__, |
1d7b9b20 | 1073 | WTMP_FILE, strerror(errno)); |
1074 | ret = 0; | |
1075 | } | |
fa64c868 | 1076 | close(fd); |
1077 | return (ret); | |
564dd50a | 1078 | } |
1d7b9b20 | 1079 | |
1d7b9b20 | 1080 | static int |
a05a70ab | 1081 | wtmp_perform_login(struct logininfo *li) |
1082 | { | |
1d7b9b20 | 1083 | struct utmp ut; |
1084 | ||
1085 | construct_utmp(li, &ut); | |
fa64c868 | 1086 | return (wtmp_write(li, &ut)); |
564dd50a | 1087 | } |
1d7b9b20 | 1088 | |
1089 | ||
1090 | static int | |
564dd50a | 1091 | wtmp_perform_logout(struct logininfo *li) |
1092 | { | |
1d7b9b20 | 1093 | struct utmp ut; |
1094 | ||
1095 | construct_utmp(li, &ut); | |
fa64c868 | 1096 | return (wtmp_write(li, &ut)); |
564dd50a | 1097 | } |
1d7b9b20 | 1098 | |
1099 | ||
1100 | int | |
564dd50a | 1101 | wtmp_write_entry(struct logininfo *li) |
1102 | { | |
1d7b9b20 | 1103 | switch(li->type) { |
1104 | case LTYPE_LOGIN: | |
fa64c868 | 1105 | return (wtmp_perform_login(li)); |
1d7b9b20 | 1106 | case LTYPE_LOGOUT: |
fa64c868 | 1107 | return (wtmp_perform_logout(li)); |
1d7b9b20 | 1108 | default: |
a233586b | 1109 | logit("%s: invalid type field", __func__); |
fa64c868 | 1110 | return (0); |
1d7b9b20 | 1111 | } |
564dd50a | 1112 | } |
1d7b9b20 | 1113 | |
1114 | ||
fa64c868 | 1115 | /* |
1116 | * Notes on fetching login data from wtmp/wtmpx | |
2b87da3b | 1117 | * |
5abcdf8e | 1118 | * Logouts are usually recorded with (amongst other things) a blank |
1119 | * username on a given tty line. However, some systems (HP-UX is one) | |
1120 | * leave all fields set, but change the ut_type field to DEAD_PROCESS. | |
1121 | * | |
1122 | * Since we're only looking for logins here, we know that the username | |
1123 | * must be set correctly. On systems that leave it in, we check for | |
1124 | * ut_type==USER_PROCESS (indicating a login.) | |
1125 | * | |
1126 | * Portability: Some systems may set something other than USER_PROCESS | |
1127 | * to indicate a login process. I don't know of any as I write. Also, | |
1128 | * it's possible that some systems may both leave the username in | |
1129 | * place and not have ut_type. | |
1130 | */ | |
1131 | ||
5abcdf8e | 1132 | /* return true if this wtmp entry indicates a login */ |
1133 | static int | |
1134 | wtmp_islogin(struct logininfo *li, struct utmp *ut) | |
1135 | { | |
2b87da3b | 1136 | if (strncmp(li->username, ut->ut_name, |
fa64c868 | 1137 | MIN_SIZEOF(li->username, ut->ut_name)) == 0) { |
a05a70ab | 1138 | # ifdef HAVE_TYPE_IN_UTMP |
5abcdf8e | 1139 | if (ut->ut_type & USER_PROCESS) |
fa64c868 | 1140 | return (1); |
a05a70ab | 1141 | # else |
fa64c868 | 1142 | return (1); |
a05a70ab | 1143 | # endif |
5abcdf8e | 1144 | } |
fa64c868 | 1145 | return (0); |
5abcdf8e | 1146 | } |
1147 | ||
1d7b9b20 | 1148 | int |
564dd50a | 1149 | wtmp_get_entry(struct logininfo *li) |
1150 | { | |
1d7b9b20 | 1151 | struct stat st; |
1152 | struct utmp ut; | |
fa64c868 | 1153 | int fd, found = 0; |
5abcdf8e | 1154 | |
1155 | /* Clear the time entries in our logininfo */ | |
1156 | li->tv_sec = li->tv_usec = 0; | |
1d7b9b20 | 1157 | |
1158 | if ((fd = open(WTMP_FILE, O_RDONLY)) < 0) { | |
a233586b | 1159 | logit("%s: problem opening %s: %s", __func__, |
1d7b9b20 | 1160 | WTMP_FILE, strerror(errno)); |
fa64c868 | 1161 | return (0); |
1d7b9b20 | 1162 | } |
2b87da3b | 1163 | if (fstat(fd, &st) != 0) { |
a233586b | 1164 | logit("%s: couldn't stat %s: %s", __func__, |
1d7b9b20 | 1165 | WTMP_FILE, strerror(errno)); |
1166 | close(fd); | |
fa64c868 | 1167 | return (0); |
1d7b9b20 | 1168 | } |
1d7b9b20 | 1169 | |
5abcdf8e | 1170 | /* Seek to the start of the last struct utmp */ |
d9d47a26 | 1171 | if (lseek(fd, -(off_t)sizeof(struct utmp), SEEK_END) == -1) { |
5abcdf8e | 1172 | /* Looks like we've got a fresh wtmp file */ |
1173 | close(fd); | |
fa64c868 | 1174 | return (0); |
5abcdf8e | 1175 | } |
1176 | ||
1177 | while (!found) { | |
9f32ceb4 | 1178 | if (atomicio(read, fd, &ut, sizeof(ut)) != sizeof(ut)) { |
a233586b | 1179 | logit("%s: read of %s failed: %s", __func__, |
1d7b9b20 | 1180 | WTMP_FILE, strerror(errno)); |
1181 | close (fd); | |
fa64c868 | 1182 | return (0); |
1d7b9b20 | 1183 | } |
5abcdf8e | 1184 | if ( wtmp_islogin(li, &ut) ) { |
1185 | found = 1; | |
fa64c868 | 1186 | /* |
1187 | * We've already checked for a time in struct | |
1188 | * utmp, in login_getlast() | |
1189 | */ | |
a05a70ab | 1190 | # ifdef HAVE_TIME_IN_UTMP |
1d7b9b20 | 1191 | li->tv_sec = ut.ut_time; |
a05a70ab | 1192 | # else |
1d7b9b20 | 1193 | # if HAVE_TV_IN_UTMP |
1194 | li->tv_sec = ut.ut_tv.tv_sec; | |
1195 | # endif | |
a05a70ab | 1196 | # endif |
5abcdf8e | 1197 | line_fullname(li->line, ut.ut_line, |
fa64c868 | 1198 | MIN_SIZEOF(li->line, ut.ut_line)); |
a05a70ab | 1199 | # ifdef HAVE_HOST_IN_UTMP |
5abcdf8e | 1200 | strlcpy(li->hostname, ut.ut_host, |
fa64c868 | 1201 | MIN_SIZEOF(li->hostname, ut.ut_host)); |
a05a70ab | 1202 | # endif |
5abcdf8e | 1203 | continue; |
1d7b9b20 | 1204 | } |
5abcdf8e | 1205 | /* Seek back 2 x struct utmp */ |
d9d47a26 | 1206 | if (lseek(fd, -(off_t)(2 * sizeof(struct utmp)), SEEK_CUR) == -1) { |
5abcdf8e | 1207 | /* We've found the start of the file, so quit */ |
fa64c868 | 1208 | close(fd); |
1209 | return (0); | |
1d7b9b20 | 1210 | } |
5abcdf8e | 1211 | } |
1212 | ||
1213 | /* We found an entry. Tidy up and return */ | |
1214 | close(fd); | |
fa64c868 | 1215 | return (1); |
564dd50a | 1216 | } |
a05a70ab | 1217 | # endif /* USE_WTMP */ |
1d7b9b20 | 1218 | |
1219 | ||
1220 | /** | |
564dd50a | 1221 | ** Low-level wtmpx functions |
1d7b9b20 | 1222 | **/ |
1223 | ||
1224 | #ifdef USE_WTMPX | |
fa64c868 | 1225 | /* |
1226 | * Write a wtmpx entry direct to the end of the file | |
1227 | * This is a slight modification of code in OpenBSD's logwtmp.c | |
1228 | */ | |
1d7b9b20 | 1229 | static int |
564dd50a | 1230 | wtmpx_write(struct logininfo *li, struct utmpx *utx) |
1231 | { | |
41c64c91 | 1232 | #ifndef HAVE_UPDWTMPX |
1d7b9b20 | 1233 | struct stat buf; |
1234 | int fd, ret = 1; | |
1235 | ||
1236 | if ((fd = open(WTMPX_FILE, O_WRONLY|O_APPEND, 0)) < 0) { | |
a233586b | 1237 | logit("%s: problem opening %s: %s", __func__, |
1d7b9b20 | 1238 | WTMPX_FILE, strerror(errno)); |
fa64c868 | 1239 | return (0); |
1d7b9b20 | 1240 | } |
1241 | ||
2b87da3b | 1242 | if (fstat(fd, &buf) == 0) |
d72f7b79 | 1243 | if (atomicio(vwrite, fd, utx, sizeof(*utx)) != sizeof(*utx)) { |
1d7b9b20 | 1244 | ftruncate(fd, buf.st_size); |
a233586b | 1245 | logit("%s: problem writing %s: %s", __func__, |
1d7b9b20 | 1246 | WTMPX_FILE, strerror(errno)); |
1247 | ret = 0; | |
1248 | } | |
fa64c868 | 1249 | close(fd); |
1d7b9b20 | 1250 | |
fa64c868 | 1251 | return (ret); |
41c64c91 | 1252 | #else |
1253 | updwtmpx(WTMPX_FILE, utx); | |
fa64c868 | 1254 | return (1); |
41c64c91 | 1255 | #endif |
564dd50a | 1256 | } |
1d7b9b20 | 1257 | |
1258 | ||
1259 | static int | |
564dd50a | 1260 | wtmpx_perform_login(struct logininfo *li) |
1261 | { | |
1d7b9b20 | 1262 | struct utmpx utx; |
1263 | ||
1264 | construct_utmpx(li, &utx); | |
fa64c868 | 1265 | return (wtmpx_write(li, &utx)); |
564dd50a | 1266 | } |
1d7b9b20 | 1267 | |
1268 | ||
1269 | static int | |
564dd50a | 1270 | wtmpx_perform_logout(struct logininfo *li) |
1271 | { | |
1d7b9b20 | 1272 | struct utmpx utx; |
1273 | ||
1274 | construct_utmpx(li, &utx); | |
fa64c868 | 1275 | return (wtmpx_write(li, &utx)); |
564dd50a | 1276 | } |
1d7b9b20 | 1277 | |
1278 | ||
1279 | int | |
564dd50a | 1280 | wtmpx_write_entry(struct logininfo *li) |
1281 | { | |
1d7b9b20 | 1282 | switch(li->type) { |
1283 | case LTYPE_LOGIN: | |
fa64c868 | 1284 | return (wtmpx_perform_login(li)); |
1d7b9b20 | 1285 | case LTYPE_LOGOUT: |
fa64c868 | 1286 | return (wtmpx_perform_logout(li)); |
1d7b9b20 | 1287 | default: |
a233586b | 1288 | logit("%s: invalid type field", __func__); |
fa64c868 | 1289 | return (0); |
1d7b9b20 | 1290 | } |
564dd50a | 1291 | } |
1d7b9b20 | 1292 | |
5abcdf8e | 1293 | /* Please see the notes above wtmp_islogin() for information about the |
1294 | next two functions */ | |
1295 | ||
1296 | /* Return true if this wtmpx entry indicates a login */ | |
1297 | static int | |
1298 | wtmpx_islogin(struct logininfo *li, struct utmpx *utx) | |
1299 | { | |
fa64c868 | 1300 | if (strncmp(li->username, utx->ut_name, |
1301 | MIN_SIZEOF(li->username, utx->ut_name)) == 0 ) { | |
a05a70ab | 1302 | # ifdef HAVE_TYPE_IN_UTMPX |
5abcdf8e | 1303 | if (utx->ut_type == USER_PROCESS) |
fa64c868 | 1304 | return (1); |
a05a70ab | 1305 | # else |
fa64c868 | 1306 | return (1); |
a05a70ab | 1307 | # endif |
5abcdf8e | 1308 | } |
fa64c868 | 1309 | return (0); |
5abcdf8e | 1310 | } |
1311 | ||
1d7b9b20 | 1312 | |
1313 | int | |
564dd50a | 1314 | wtmpx_get_entry(struct logininfo *li) |
1315 | { | |
1d7b9b20 | 1316 | struct stat st; |
1317 | struct utmpx utx; | |
5abcdf8e | 1318 | int fd, found=0; |
1319 | ||
1320 | /* Clear the time entries */ | |
1321 | li->tv_sec = li->tv_usec = 0; | |
1d7b9b20 | 1322 | |
1323 | if ((fd = open(WTMPX_FILE, O_RDONLY)) < 0) { | |
a233586b | 1324 | logit("%s: problem opening %s: %s", __func__, |
1d7b9b20 | 1325 | WTMPX_FILE, strerror(errno)); |
fa64c868 | 1326 | return (0); |
1d7b9b20 | 1327 | } |
2b87da3b | 1328 | if (fstat(fd, &st) != 0) { |
a233586b | 1329 | logit("%s: couldn't stat %s: %s", __func__, |
fdebdd4f | 1330 | WTMPX_FILE, strerror(errno)); |
1d7b9b20 | 1331 | close(fd); |
fa64c868 | 1332 | return (0); |
1d7b9b20 | 1333 | } |
2b87da3b | 1334 | |
5abcdf8e | 1335 | /* Seek to the start of the last struct utmpx */ |
d9d47a26 | 1336 | if (lseek(fd, -(off_t)sizeof(struct utmpx), SEEK_END) == -1 ) { |
5abcdf8e | 1337 | /* probably a newly rotated wtmpx file */ |
1338 | close(fd); | |
fa64c868 | 1339 | return (0); |
5abcdf8e | 1340 | } |
1d7b9b20 | 1341 | |
5abcdf8e | 1342 | while (!found) { |
9f32ceb4 | 1343 | if (atomicio(read, fd, &utx, sizeof(utx)) != sizeof(utx)) { |
a233586b | 1344 | logit("%s: read of %s failed: %s", __func__, |
1d7b9b20 | 1345 | WTMPX_FILE, strerror(errno)); |
1346 | close (fd); | |
fa64c868 | 1347 | return (0); |
1d7b9b20 | 1348 | } |
fa64c868 | 1349 | /* |
1350 | * Logouts are recorded as a blank username on a particular | |
1351 | * line. So, we just need to find the username in struct utmpx | |
1352 | */ | |
1353 | if (wtmpx_islogin(li, &utx)) { | |
d80063fe | 1354 | found = 1; |
fa64c868 | 1355 | # if defined(HAVE_TV_IN_UTMPX) |
1d7b9b20 | 1356 | li->tv_sec = utx.ut_tv.tv_sec; |
fa64c868 | 1357 | # elif defined(HAVE_TIME_IN_UTMPX) |
1d7b9b20 | 1358 | li->tv_sec = utx.ut_time; |
a05a70ab | 1359 | # endif |
a4d05724 | 1360 | line_fullname(li->line, utx.ut_line, sizeof(li->line)); |
fa64c868 | 1361 | # if defined(HAVE_HOST_IN_UTMPX) |
5abcdf8e | 1362 | strlcpy(li->hostname, utx.ut_host, |
fa64c868 | 1363 | MIN_SIZEOF(li->hostname, utx.ut_host)); |
a05a70ab | 1364 | # endif |
5abcdf8e | 1365 | continue; |
1d7b9b20 | 1366 | } |
d9d47a26 | 1367 | if (lseek(fd, -(off_t)(2 * sizeof(struct utmpx)), SEEK_CUR) == -1) { |
fa64c868 | 1368 | close(fd); |
1369 | return (0); | |
1d7b9b20 | 1370 | } |
5abcdf8e | 1371 | } |
1372 | ||
1373 | close(fd); | |
fa64c868 | 1374 | return (1); |
564dd50a | 1375 | } |
f988dce5 | 1376 | #endif /* USE_WTMPX */ |
1d7b9b20 | 1377 | |
1d7b9b20 | 1378 | /** |
564dd50a | 1379 | ** Low-level libutil login() functions |
1d7b9b20 | 1380 | **/ |
1381 | ||
1382 | #ifdef USE_LOGIN | |
1d7b9b20 | 1383 | static int |
564dd50a | 1384 | syslogin_perform_login(struct logininfo *li) |
1385 | { | |
1d7b9b20 | 1386 | struct utmp *ut; |
1387 | ||
7a52470e | 1388 | ut = xmalloc(sizeof(*ut)); |
1d7b9b20 | 1389 | construct_utmp(li, ut); |
1390 | login(ut); | |
6cef88bc | 1391 | free(ut); |
1d7b9b20 | 1392 | |
fa64c868 | 1393 | return (1); |
564dd50a | 1394 | } |
1d7b9b20 | 1395 | |
564dd50a | 1396 | static int |
1397 | syslogin_perform_logout(struct logininfo *li) | |
1398 | { | |
a05a70ab | 1399 | # ifdef HAVE_LOGOUT |
f20d4564 | 1400 | char line[UT_LINESIZE]; |
2b87da3b | 1401 | |
1d7b9b20 | 1402 | (void)line_stripname(line, li->line, sizeof(line)); |
1403 | ||
fa64c868 | 1404 | if (!logout(line)) |
a233586b | 1405 | logit("%s: logout() returned an error", __func__); |
a05a70ab | 1406 | # ifdef HAVE_LOGWTMP |
fa64c868 | 1407 | else |
1d7b9b20 | 1408 | logwtmp(line, "", ""); |
a05a70ab | 1409 | # endif |
5abcdf8e | 1410 | /* FIXME: (ATL - if the need arises) What to do if we have |
1411 | * login, but no logout? what if logout but no logwtmp? All | |
1412 | * routines are in libutil so they should all be there, | |
1413 | * but... */ | |
a05a70ab | 1414 | # endif |
fa64c868 | 1415 | return (1); |
564dd50a | 1416 | } |
1d7b9b20 | 1417 | |
1d7b9b20 | 1418 | int |
564dd50a | 1419 | syslogin_write_entry(struct logininfo *li) |
1420 | { | |
1d7b9b20 | 1421 | switch (li->type) { |
1422 | case LTYPE_LOGIN: | |
fa64c868 | 1423 | return (syslogin_perform_login(li)); |
1d7b9b20 | 1424 | case LTYPE_LOGOUT: |
fa64c868 | 1425 | return (syslogin_perform_logout(li)); |
1d7b9b20 | 1426 | default: |
a233586b | 1427 | logit("%s: Invalid type field", __func__); |
fa64c868 | 1428 | return (0); |
1d7b9b20 | 1429 | } |
564dd50a | 1430 | } |
f988dce5 | 1431 | #endif /* USE_LOGIN */ |
1d7b9b20 | 1432 | |
1433 | /* end of file log-syslogin.c */ | |
1434 | ||
1d7b9b20 | 1435 | /** |
564dd50a | 1436 | ** Low-level lastlog functions |
1d7b9b20 | 1437 | **/ |
1438 | ||
1439 | #ifdef USE_LASTLOG | |
a05a70ab | 1440 | #define LL_FILE 1 |
1441 | #define LL_DIR 2 | |
1442 | #define LL_OTHER 3 | |
1d7b9b20 | 1443 | |
1d7b9b20 | 1444 | static void |
564dd50a | 1445 | lastlog_construct(struct logininfo *li, struct lastlog *last) |
1446 | { | |
1d7b9b20 | 1447 | /* clear the structure */ |
dbaa2e87 | 1448 | memset(last, '\0', sizeof(*last)); |
2b87da3b | 1449 | |
fa64c868 | 1450 | line_stripname(last->ll_line, li->line, sizeof(last->ll_line)); |
5abcdf8e | 1451 | strlcpy(last->ll_host, li->hostname, |
1452 | MIN_SIZEOF(last->ll_host, li->hostname)); | |
1d7b9b20 | 1453 | last->ll_time = li->tv_sec; |
564dd50a | 1454 | } |
1d7b9b20 | 1455 | |
1d7b9b20 | 1456 | static int |
564dd50a | 1457 | lastlog_filetype(char *filename) |
1458 | { | |
1d7b9b20 | 1459 | struct stat st; |
1460 | ||
a05a70ab | 1461 | if (stat(LASTLOG_FILE, &st) != 0) { |
a233586b | 1462 | logit("%s: Couldn't stat %s: %s", __func__, |
fa64c868 | 1463 | LASTLOG_FILE, strerror(errno)); |
1464 | return (0); | |
1d7b9b20 | 1465 | } |
1d7b9b20 | 1466 | if (S_ISDIR(st.st_mode)) |
fa64c868 | 1467 | return (LL_DIR); |
1d7b9b20 | 1468 | else if (S_ISREG(st.st_mode)) |
fa64c868 | 1469 | return (LL_FILE); |
1d7b9b20 | 1470 | else |
fa64c868 | 1471 | return (LL_OTHER); |
564dd50a | 1472 | } |
1d7b9b20 | 1473 | |
1474 | ||
1475 | /* open the file (using filemode) and seek to the login entry */ | |
1476 | static int | |
564dd50a | 1477 | lastlog_openseek(struct logininfo *li, int *fd, int filemode) |
1478 | { | |
1d7b9b20 | 1479 | off_t offset; |
1480 | int type; | |
1481 | char lastlog_file[1024]; | |
1482 | ||
1483 | type = lastlog_filetype(LASTLOG_FILE); | |
1484 | switch (type) { | |
fa64c868 | 1485 | case LL_FILE: |
1486 | strlcpy(lastlog_file, LASTLOG_FILE, | |
1487 | sizeof(lastlog_file)); | |
1488 | break; | |
1489 | case LL_DIR: | |
1490 | snprintf(lastlog_file, sizeof(lastlog_file), "%s/%s", | |
1491 | LASTLOG_FILE, li->username); | |
1492 | break; | |
1493 | default: | |
a233586b | 1494 | logit("%s: %.100s is not a file or directory!", __func__, |
fa64c868 | 1495 | LASTLOG_FILE); |
1496 | return (0); | |
a05a70ab | 1497 | } |
1d7b9b20 | 1498 | |
ee476051 | 1499 | *fd = open(lastlog_file, filemode, 0600); |
fa64c868 | 1500 | if (*fd < 0) { |
a233586b | 1501 | debug("%s: Couldn't open %s: %s", __func__, |
1d7b9b20 | 1502 | lastlog_file, strerror(errno)); |
fa64c868 | 1503 | return (0); |
1d7b9b20 | 1504 | } |
2b87da3b | 1505 | |
d93a7e5a | 1506 | if (type == LL_FILE) { |
1507 | /* find this uid's offset in the lastlog file */ | |
d9d47a26 | 1508 | offset = (off_t) ((long)li->uid * sizeof(struct lastlog)); |
1d7b9b20 | 1509 | |
fa64c868 | 1510 | if (lseek(*fd, offset, SEEK_SET) != offset) { |
a233586b | 1511 | logit("%s: %s->lseek(): %s", __func__, |
1512 | lastlog_file, strerror(errno)); | |
fa64c868 | 1513 | return (0); |
d93a7e5a | 1514 | } |
1d7b9b20 | 1515 | } |
2b87da3b | 1516 | |
fa64c868 | 1517 | return (1); |
564dd50a | 1518 | } |
1d7b9b20 | 1519 | |
1520 | static int | |
564dd50a | 1521 | lastlog_perform_login(struct logininfo *li) |
1522 | { | |
1d7b9b20 | 1523 | struct lastlog last; |
1524 | int fd; | |
1525 | ||
1526 | /* create our struct lastlog */ | |
1527 | lastlog_construct(li, &last); | |
1528 | ||
ee476051 | 1529 | if (!lastlog_openseek(li, &fd, O_RDWR|O_CREAT)) |
fa64c868 | 1530 | return (0); |
2b87da3b | 1531 | |
1d7b9b20 | 1532 | /* write the entry */ |
d72f7b79 | 1533 | if (atomicio(vwrite, fd, &last, sizeof(last)) != sizeof(last)) { |
1a022229 | 1534 | close(fd); |
a233586b | 1535 | logit("%s: Error writing to %s: %s", __func__, |
1a022229 | 1536 | LASTLOG_FILE, strerror(errno)); |
fa64c868 | 1537 | return (0); |
a05a70ab | 1538 | } |
1a022229 | 1539 | |
1540 | close(fd); | |
fa64c868 | 1541 | return (1); |
564dd50a | 1542 | } |
1d7b9b20 | 1543 | |
1d7b9b20 | 1544 | int |
564dd50a | 1545 | lastlog_write_entry(struct logininfo *li) |
1546 | { | |
1d7b9b20 | 1547 | switch(li->type) { |
1548 | case LTYPE_LOGIN: | |
fa64c868 | 1549 | return (lastlog_perform_login(li)); |
1d7b9b20 | 1550 | default: |
a233586b | 1551 | logit("%s: Invalid type field", __func__); |
fa64c868 | 1552 | return (0); |
1d7b9b20 | 1553 | } |
564dd50a | 1554 | } |
1d7b9b20 | 1555 | |
1d7b9b20 | 1556 | static void |
564dd50a | 1557 | lastlog_populate_entry(struct logininfo *li, struct lastlog *last) |
1558 | { | |
1d7b9b20 | 1559 | line_fullname(li->line, last->ll_line, sizeof(li->line)); |
2b87da3b | 1560 | strlcpy(li->hostname, last->ll_host, |
fa64c868 | 1561 | MIN_SIZEOF(li->hostname, last->ll_host)); |
1d7b9b20 | 1562 | li->tv_sec = last->ll_time; |
564dd50a | 1563 | } |
1d7b9b20 | 1564 | |
1d7b9b20 | 1565 | int |
564dd50a | 1566 | lastlog_get_entry(struct logininfo *li) |
1567 | { | |
1d7b9b20 | 1568 | struct lastlog last; |
ed05a983 | 1569 | int fd, ret; |
1d7b9b20 | 1570 | |
ce49121d | 1571 | if (!lastlog_openseek(li, &fd, O_RDONLY)) |
ed05a983 | 1572 | return (0); |
ce49121d | 1573 | |
ed05a983 | 1574 | ret = atomicio(read, fd, &last, sizeof(last)); |
ce49121d | 1575 | close(fd); |
1576 | ||
ed05a983 | 1577 | switch (ret) { |
1578 | case 0: | |
1579 | memset(&last, '\0', sizeof(last)); | |
1580 | /* FALLTHRU */ | |
1581 | case sizeof(last): | |
1582 | lastlog_populate_entry(li, &last); | |
1583 | return (1); | |
1584 | case -1: | |
aff51935 | 1585 | error("%s: Error reading from %s: %s", __func__, |
ed05a983 | 1586 | LASTLOG_FILE, strerror(errno)); |
1587 | return (0); | |
1588 | default: | |
1589 | error("%s: Error reading from %s: Expecting %d, got %d", | |
1590 | __func__, LASTLOG_FILE, sizeof(last), ret); | |
1591 | return (0); | |
1592 | } | |
ce49121d | 1593 | |
ed05a983 | 1594 | /* NOTREACHED */ |
1595 | return (0); | |
564dd50a | 1596 | } |
f988dce5 | 1597 | #endif /* USE_LASTLOG */ |
b6610e8f | 1598 | |
1599 | #ifdef USE_BTMP | |
1600 | /* | |
1601 | * Logs failed login attempts in _PATH_BTMP if that exists. | |
1602 | * The most common login failure is to give password instead of username. | |
1603 | * So the _PATH_BTMP file checked for the correct permission, so that | |
1604 | * only root can read it. | |
1605 | */ | |
1606 | ||
1607 | void | |
1608 | record_failed_login(const char *username, const char *hostname, | |
1609 | const char *ttyn) | |
1610 | { | |
1611 | int fd; | |
1612 | struct utmp ut; | |
1613 | struct sockaddr_storage from; | |
1614 | size_t fromlen = sizeof(from); | |
1615 | struct sockaddr_in *a4; | |
1616 | struct sockaddr_in6 *a6; | |
1617 | time_t t; | |
1618 | struct stat fst; | |
1619 | ||
1620 | if (geteuid() != 0) | |
1621 | return; | |
1622 | if ((fd = open(_PATH_BTMP, O_WRONLY | O_APPEND)) < 0) { | |
1623 | debug("Unable to open the btmp file %s: %s", _PATH_BTMP, | |
1624 | strerror(errno)); | |
1625 | return; | |
1626 | } | |
1627 | if (fstat(fd, &fst) < 0) { | |
1628 | logit("%s: fstat of %s failed: %s", __func__, _PATH_BTMP, | |
1629 | strerror(errno)); | |
1630 | goto out; | |
1631 | } | |
1632 | if((fst.st_mode & (S_IRWXG | S_IRWXO)) || (fst.st_uid != 0)){ | |
1633 | logit("Excess permission or bad ownership on file %s", | |
1634 | _PATH_BTMP); | |
1635 | goto out; | |
1636 | } | |
1637 | ||
1638 | memset(&ut, 0, sizeof(ut)); | |
1639 | /* strncpy because we don't necessarily want nul termination */ | |
1640 | strncpy(ut.ut_user, username, sizeof(ut.ut_user)); | |
1641 | strlcpy(ut.ut_line, "ssh:notty", sizeof(ut.ut_line)); | |
1642 | ||
1643 | time(&t); | |
1644 | ut.ut_time = t; /* ut_time is not always a time_t */ | |
1645 | ut.ut_type = LOGIN_PROCESS; | |
1646 | ut.ut_pid = getpid(); | |
1647 | ||
1648 | /* strncpy because we don't necessarily want nul termination */ | |
1649 | strncpy(ut.ut_host, hostname, sizeof(ut.ut_host)); | |
1650 | ||
1651 | if (packet_connection_is_on_socket() && | |
1652 | getpeername(packet_get_connection_in(), | |
1653 | (struct sockaddr *)&from, &fromlen) == 0) { | |
1654 | ipv64_normalise_mapped(&from, &fromlen); | |
1655 | if (from.ss_family == AF_INET) { | |
1656 | a4 = (struct sockaddr_in *)&from; | |
1657 | memcpy(&ut.ut_addr, &(a4->sin_addr), | |
1658 | MIN_SIZEOF(ut.ut_addr, a4->sin_addr)); | |
1659 | } | |
1660 | #ifdef HAVE_ADDR_V6_IN_UTMP | |
1661 | if (from.ss_family == AF_INET6) { | |
1662 | a6 = (struct sockaddr_in6 *)&from; | |
1663 | memcpy(&ut.ut_addr_v6, &(a6->sin6_addr), | |
1664 | MIN_SIZEOF(ut.ut_addr_v6, a6->sin6_addr)); | |
1665 | } | |
1666 | #endif | |
1667 | } | |
1668 | ||
1669 | if (atomicio(vwrite, fd, &ut, sizeof(ut)) != sizeof(ut)) | |
1670 | error("Failed to write to %s: %s", _PATH_BTMP, | |
1671 | strerror(errno)); | |
1672 | ||
1673 | out: | |
1674 | close(fd); | |
1675 | } | |
1676 | #endif /* USE_BTMP */ |