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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" |
c53d8c93 | 158 | #include "buffer.h" |
1d7b9b20 | 159 | |
44d5f7f7 | 160 | #ifdef HAVE_UTIL_H |
fa64c868 | 161 | # include <util.h> |
44d5f7f7 | 162 | #endif |
163 | ||
8f523d67 | 164 | #ifdef HAVE_LIBUTIL_H |
fa64c868 | 165 | # include <libutil.h> |
8f523d67 | 166 | #endif |
167 | ||
fa64c868 | 168 | RCSID("$Id$"); |
169 | ||
1d7b9b20 | 170 | /** |
171 | ** prototypes for helper functions in this file | |
172 | **/ | |
173 | ||
174 | #if HAVE_UTMP_H | |
1d7b9b20 | 175 | void set_utmp_time(struct logininfo *li, struct utmp *ut); |
176 | void construct_utmp(struct logininfo *li, struct utmp *ut); | |
177 | #endif | |
178 | ||
179 | #ifdef HAVE_UTMPX_H | |
1d7b9b20 | 180 | void set_utmpx_time(struct logininfo *li, struct utmpx *ut); |
181 | void construct_utmpx(struct logininfo *li, struct utmpx *ut); | |
182 | #endif | |
183 | ||
184 | int utmp_write_entry(struct logininfo *li); | |
185 | int utmpx_write_entry(struct logininfo *li); | |
186 | int wtmp_write_entry(struct logininfo *li); | |
187 | int wtmpx_write_entry(struct logininfo *li); | |
188 | int lastlog_write_entry(struct logininfo *li); | |
189 | int syslogin_write_entry(struct logininfo *li); | |
190 | ||
191 | int getlast_entry(struct logininfo *li); | |
192 | int lastlog_get_entry(struct logininfo *li); | |
193 | int wtmp_get_entry(struct logininfo *li); | |
194 | int wtmpx_get_entry(struct logininfo *li); | |
195 | ||
5ccf88cb | 196 | extern Buffer loginmsg; |
197 | ||
5abcdf8e | 198 | /* pick the shortest string */ |
fa64c868 | 199 | #define MIN_SIZEOF(s1,s2) (sizeof(s1) < sizeof(s2) ? sizeof(s1) : sizeof(s2)) |
5abcdf8e | 200 | |
1d7b9b20 | 201 | /** |
202 | ** platform-independent login functions | |
203 | **/ | |
204 | ||
fa64c868 | 205 | /* |
206 | * login_login(struct logininfo *) - Record a login | |
2b87da3b | 207 | * |
5abcdf8e | 208 | * Call with a pointer to a struct logininfo initialised with |
209 | * login_init_entry() or login_alloc_entry() | |
210 | * | |
211 | * Returns: | |
212 | * >0 if successful | |
213 | * 0 on failure (will use OpenSSH's logging facilities for diagnostics) | |
214 | */ | |
564dd50a | 215 | int |
fa64c868 | 216 | login_login(struct logininfo *li) |
564dd50a | 217 | { |
218 | li->type = LTYPE_LOGIN; | |
fa64c868 | 219 | return (login_write(li)); |
564dd50a | 220 | } |
1d7b9b20 | 221 | |
222 | ||
fa64c868 | 223 | /* |
224 | * login_logout(struct logininfo *) - Record a logout | |
5abcdf8e | 225 | * |
226 | * Call as with login_login() | |
227 | * | |
228 | * Returns: | |
229 | * >0 if successful | |
230 | * 0 on failure (will use OpenSSH's logging facilities for diagnostics) | |
231 | */ | |
564dd50a | 232 | int |
233 | login_logout(struct logininfo *li) | |
234 | { | |
235 | li->type = LTYPE_LOGOUT; | |
fa64c868 | 236 | return (login_write(li)); |
1d7b9b20 | 237 | } |
238 | ||
fa64c868 | 239 | /* |
240 | * login_get_lastlog_time(int) - Retrieve the last login time | |
5abcdf8e | 241 | * |
242 | * Retrieve the last login time for the given uid. Will try to use the | |
243 | * system lastlog facilities if they are available, but will fall back | |
244 | * to looking in wtmp/wtmpx if necessary | |
245 | * | |
246 | * Returns: | |
247 | * 0 on failure, or if user has never logged in | |
248 | * Time in seconds from the epoch if successful | |
249 | * | |
250 | * Useful preprocessor symbols: | |
251 | * DISABLE_LASTLOG: If set, *never* even try to retrieve lastlog | |
252 | * info | |
253 | * USE_LASTLOG: If set, indicates the presence of system lastlog | |
254 | * facilities. If this and DISABLE_LASTLOG are not set, | |
255 | * try to retrieve lastlog information from wtmp/wtmpx. | |
256 | */ | |
564dd50a | 257 | unsigned int |
258 | login_get_lastlog_time(const int uid) | |
259 | { | |
260 | struct logininfo li; | |
1d7b9b20 | 261 | |
5abcdf8e | 262 | if (login_get_lastlog(&li, uid)) |
fa64c868 | 263 | return (li.tv_sec); |
5abcdf8e | 264 | else |
fa64c868 | 265 | return (0); |
564dd50a | 266 | } |
1d7b9b20 | 267 | |
fa64c868 | 268 | /* |
269 | * login_get_lastlog(struct logininfo *, int) - Retrieve a lastlog entry | |
5abcdf8e | 270 | * |
271 | * Retrieve a logininfo structure populated (only partially) with | |
272 | * information from the system lastlog data, or from wtmp/wtmpx if no | |
273 | * system lastlog information exists. | |
274 | * | |
275 | * Note this routine must be given a pre-allocated logininfo. | |
276 | * | |
277 | * Returns: | |
278 | * >0: A pointer to your struct logininfo if successful | |
279 | * 0 on failure (will use OpenSSH's logging facilities for diagnostics) | |
5abcdf8e | 280 | */ |
564dd50a | 281 | struct logininfo * |
282 | login_get_lastlog(struct logininfo *li, const int uid) | |
283 | { | |
5abcdf8e | 284 | struct passwd *pw; |
5abcdf8e | 285 | |
dbaa2e87 | 286 | memset(li, '\0', sizeof(*li)); |
1d7b9b20 | 287 | li->uid = uid; |
5abcdf8e | 288 | |
2b87da3b | 289 | /* |
9f32ceb4 | 290 | * If we don't have a 'real' lastlog, we need the username to |
5abcdf8e | 291 | * reliably search wtmp(x) for the last login (see |
2b87da3b | 292 | * wtmp_get_entry().) |
9f32ceb4 | 293 | */ |
5abcdf8e | 294 | pw = getpwuid(uid); |
a05a70ab | 295 | if (pw == NULL) |
a233586b | 296 | fatal("%s: Cannot find account for uid %i", __func__, uid); |
2b87da3b | 297 | |
1bfbb762 | 298 | /* No MIN_SIZEOF here - we absolutely *must not* truncate the |
fa64c868 | 299 | * username (XXX - so check for trunc!) */ |
d8caae24 | 300 | strlcpy(li->username, pw->pw_name, sizeof(li->username)); |
a05a70ab | 301 | |
564dd50a | 302 | if (getlast_entry(li)) |
fa64c868 | 303 | return (li); |
564dd50a | 304 | else |
fa64c868 | 305 | return (NULL); |
1d7b9b20 | 306 | } |
307 | ||
1d7b9b20 | 308 | |
fa64c868 | 309 | /* |
310 | * login_alloc_entry(int, char*, char*, char*) - Allocate and initialise | |
2b87da3b | 311 | * a logininfo structure |
312 | * | |
5abcdf8e | 313 | * This function creates a new struct logininfo, a data structure |
314 | * meant to carry the information required to portably record login info. | |
315 | * | |
316 | * Returns a pointer to a newly created struct logininfo. If memory | |
317 | * allocation fails, the program halts. | |
318 | */ | |
564dd50a | 319 | struct |
320 | logininfo *login_alloc_entry(int pid, const char *username, | |
fa64c868 | 321 | const char *hostname, const char *line) |
564dd50a | 322 | { |
323 | struct logininfo *newli; | |
1d7b9b20 | 324 | |
fa64c868 | 325 | newli = xmalloc(sizeof(*newli)); |
326 | login_init_entry(newli, pid, username, hostname, line); | |
327 | return (newli); | |
1d7b9b20 | 328 | } |
329 | ||
330 | ||
5abcdf8e | 331 | /* login_free_entry(struct logininfo *) - free struct memory */ |
1d7b9b20 | 332 | void |
564dd50a | 333 | login_free_entry(struct logininfo *li) |
334 | { | |
335 | xfree(li); | |
1d7b9b20 | 336 | } |
337 | ||
338 | ||
5abcdf8e | 339 | /* login_init_entry(struct logininfo *, int, char*, char*, char*) |
340 | * - initialise a struct logininfo | |
2b87da3b | 341 | * |
5abcdf8e | 342 | * Populates a new struct logininfo, a data structure meant to carry |
343 | * the information required to portably record login info. | |
344 | * | |
345 | * Returns: 1 | |
346 | */ | |
564dd50a | 347 | int |
2b87da3b | 348 | login_init_entry(struct logininfo *li, int pid, const char *username, |
fa64c868 | 349 | const char *hostname, const char *line) |
564dd50a | 350 | { |
d8caae24 | 351 | struct passwd *pw; |
2b87da3b | 352 | |
dbaa2e87 | 353 | memset(li, 0, sizeof(*li)); |
2b87da3b | 354 | |
564dd50a | 355 | li->pid = pid; |
d8caae24 | 356 | |
564dd50a | 357 | /* set the line information */ |
358 | if (line) | |
359 | line_fullname(li->line, line, sizeof(li->line)); | |
1d7b9b20 | 360 | |
d8caae24 | 361 | if (username) { |
564dd50a | 362 | strlcpy(li->username, username, sizeof(li->username)); |
d8caae24 | 363 | pw = getpwnam(li->username); |
fa64c868 | 364 | if (pw == NULL) { |
d1cf9a87 | 365 | fatal("%s: Cannot find user \"%s\"", __func__, |
fa64c868 | 366 | li->username); |
367 | } | |
d8caae24 | 368 | li->uid = pw->pw_uid; |
369 | } | |
a05a70ab | 370 | |
564dd50a | 371 | if (hostname) |
372 | strlcpy(li->hostname, hostname, sizeof(li->hostname)); | |
d8caae24 | 373 | |
fa64c868 | 374 | return (1); |
1d7b9b20 | 375 | } |
376 | ||
d1cf9a87 | 377 | /* |
fa64c868 | 378 | * login_set_current_time(struct logininfo *) - set the current time |
5abcdf8e | 379 | * |
380 | * Set the current time in a logininfo structure. This function is | |
381 | * meant to eliminate the need to deal with system dependencies for | |
382 | * time handling. | |
383 | */ | |
1d7b9b20 | 384 | void |
564dd50a | 385 | login_set_current_time(struct logininfo *li) |
386 | { | |
1d7b9b20 | 387 | struct timeval tv; |
388 | ||
389 | gettimeofday(&tv, NULL); | |
2b87da3b | 390 | |
d8caae24 | 391 | li->tv_sec = tv.tv_sec; |
392 | li->tv_usec = tv.tv_usec; | |
1d7b9b20 | 393 | } |
394 | ||
564dd50a | 395 | /* copy a sockaddr_* into our logininfo */ |
1d7b9b20 | 396 | void |
564dd50a | 397 | login_set_addr(struct logininfo *li, const struct sockaddr *sa, |
fa64c868 | 398 | const unsigned int sa_size) |
564dd50a | 399 | { |
400 | unsigned int bufsize = sa_size; | |
401 | ||
402 | /* make sure we don't overrun our union */ | |
403 | if (sizeof(li->hostaddr) < sa_size) | |
404 | bufsize = sizeof(li->hostaddr); | |
405 | ||
fa64c868 | 406 | memcpy(&li->hostaddr.sa, sa, bufsize); |
1d7b9b20 | 407 | } |
1d7b9b20 | 408 | |
564dd50a | 409 | |
410 | /** | |
411 | ** login_write: Call low-level recording functions based on autoconf | |
412 | ** results | |
413 | **/ | |
1d7b9b20 | 414 | int |
fa64c868 | 415 | login_write(struct logininfo *li) |
564dd50a | 416 | { |
3c62e7eb | 417 | #ifndef HAVE_CYGWIN |
fa64c868 | 418 | if (geteuid() != 0) { |
419 | logit("Attempt to write login records by non-root user (aborting)"); | |
420 | return (1); | |
1d7b9b20 | 421 | } |
3c62e7eb | 422 | #endif |
a05a70ab | 423 | |
1d7b9b20 | 424 | /* set the timestamp */ |
425 | login_set_current_time(li); | |
426 | #ifdef USE_LOGIN | |
427 | syslogin_write_entry(li); | |
428 | #endif | |
429 | #ifdef USE_LASTLOG | |
fa64c868 | 430 | if (li->type == LTYPE_LOGIN) |
1d7b9b20 | 431 | lastlog_write_entry(li); |
1d7b9b20 | 432 | #endif |
433 | #ifdef USE_UTMP | |
434 | utmp_write_entry(li); | |
435 | #endif | |
436 | #ifdef USE_WTMP | |
437 | wtmp_write_entry(li); | |
438 | #endif | |
439 | #ifdef USE_UTMPX | |
440 | utmpx_write_entry(li); | |
441 | #endif | |
442 | #ifdef USE_WTMPX | |
443 | wtmpx_write_entry(li); | |
f5ed3301 | 444 | #endif |
445 | #ifdef CUSTOM_SYS_AUTH_RECORD_LOGIN | |
d1cf9a87 | 446 | if (li->type == LTYPE_LOGIN && |
5ccf88cb | 447 | !sys_auth_record_login(li->username,li->hostname,li->line, &loginmsg)) |
f5ed3301 | 448 | logit("Writing login record failed for %s", li->username); |
c00e4d75 | 449 | #endif |
6039eeef | 450 | #ifdef SSH_AUDIT_EVENTS |
c00e4d75 | 451 | if (li->type == LTYPE_LOGIN) |
452 | audit_session_open(li->line); | |
453 | else if (li->type == LTYPE_LOGOUT) | |
454 | audit_session_close(li->line); | |
1d7b9b20 | 455 | #endif |
fa64c868 | 456 | return (0); |
1d7b9b20 | 457 | } |
458 | ||
7e2d5fa4 | 459 | #ifdef LOGIN_NEEDS_UTMPX |
460 | int | |
461 | login_utmp_only(struct logininfo *li) | |
462 | { | |
aff51935 | 463 | li->type = LTYPE_LOGIN; |
9e127e27 | 464 | login_set_current_time(li); |
7e2d5fa4 | 465 | # ifdef USE_UTMP |
466 | utmp_write_entry(li); | |
467 | # endif | |
468 | # ifdef USE_WTMP | |
469 | wtmp_write_entry(li); | |
470 | # endif | |
471 | # ifdef USE_UTMPX | |
472 | utmpx_write_entry(li); | |
473 | # endif | |
474 | # ifdef USE_WTMPX | |
475 | wtmpx_write_entry(li); | |
476 | # endif | |
fa64c868 | 477 | return (0); |
7e2d5fa4 | 478 | } |
479 | #endif | |
480 | ||
564dd50a | 481 | /** |
482 | ** getlast_entry: Call low-level functions to retrieve the last login | |
483 | ** time. | |
484 | **/ | |
1d7b9b20 | 485 | |
564dd50a | 486 | /* take the uid in li and return the last login time */ |
1d7b9b20 | 487 | int |
564dd50a | 488 | getlast_entry(struct logininfo *li) |
489 | { | |
490 | #ifdef USE_LASTLOG | |
9f32ceb4 | 491 | return(lastlog_get_entry(li)); |
a05a70ab | 492 | #else /* !USE_LASTLOG */ |
1d7b9b20 | 493 | |
fa64c868 | 494 | #if defined(DISABLE_LASTLOG) |
2b87da3b | 495 | /* On some systems we shouldn't even try to obtain last login |
3f45f1c3 | 496 | * time, e.g. AIX */ |
fa64c868 | 497 | return (0); |
498 | # elif defined(USE_WTMP) && \ | |
499 | (defined(HAVE_TIME_IN_UTMP) || defined(HAVE_TV_IN_UTMP)) | |
564dd50a | 500 | /* retrieve last login time from utmp */ |
a05a70ab | 501 | return (wtmp_get_entry(li)); |
fa64c868 | 502 | # elif defined(USE_WTMPX) && \ |
503 | (defined(HAVE_TIME_IN_UTMPX) || defined(HAVE_TV_IN_UTMPX)) | |
564dd50a | 504 | /* If wtmp isn't available, try wtmpx */ |
a05a70ab | 505 | return (wtmpx_get_entry(li)); |
fa64c868 | 506 | # else |
564dd50a | 507 | /* Give up: No means of retrieving last login time */ |
fa64c868 | 508 | return (0); |
2b87da3b | 509 | # endif /* DISABLE_LASTLOG */ |
a05a70ab | 510 | #endif /* USE_LASTLOG */ |
564dd50a | 511 | } |
1d7b9b20 | 512 | |
513 | ||
1d7b9b20 | 514 | |
515 | /* | |
564dd50a | 516 | * 'line' string utility functions |
517 | * | |
518 | * These functions process the 'line' string into one of three forms: | |
519 | * | |
1d7b9b20 | 520 | * 1. The full filename (including '/dev') |
521 | * 2. The stripped name (excluding '/dev') | |
564dd50a | 522 | * 3. The abbreviated name (e.g. /dev/ttyp00 -> yp00 |
523 | * /dev/pts/1 -> ts/1 ) | |
1d7b9b20 | 524 | * |
525 | * Form 3 is used on some systems to identify a .tmp.? entry when | |
526 | * attempting to remove it. Typically both addition and removal is | |
564dd50a | 527 | * performed by one application - say, sshd - so as long as the choice |
528 | * uniquely identifies a terminal it's ok. | |
1d7b9b20 | 529 | */ |
530 | ||
531 | ||
fa64c868 | 532 | /* |
533 | * line_fullname(): add the leading '/dev/' if it doesn't exist make | |
534 | * sure dst has enough space, if not just copy src (ugh) | |
535 | */ | |
1d7b9b20 | 536 | char * |
44d71ad5 | 537 | line_fullname(char *dst, const char *src, u_int dstsize) |
564dd50a | 538 | { |
1d7b9b20 | 539 | memset(dst, '\0', dstsize); |
fa64c868 | 540 | if ((strncmp(src, "/dev/", 5) == 0) || (dstsize < (strlen(src) + 5))) |
1d7b9b20 | 541 | strlcpy(dst, src, dstsize); |
fa64c868 | 542 | else { |
a4d05724 | 543 | strlcpy(dst, "/dev/", dstsize); |
1d7b9b20 | 544 | strlcat(dst, src, dstsize); |
545 | } | |
fa64c868 | 546 | return (dst); |
1d7b9b20 | 547 | } |
548 | ||
564dd50a | 549 | /* line_stripname(): strip the leading '/dev' if it exists, return dst */ |
1d7b9b20 | 550 | char * |
564dd50a | 551 | line_stripname(char *dst, const char *src, int dstsize) |
552 | { | |
1d7b9b20 | 553 | memset(dst, '\0', dstsize); |
554 | if (strncmp(src, "/dev/", 5) == 0) | |
89d7510a | 555 | strlcpy(dst, src + 5, dstsize); |
1d7b9b20 | 556 | else |
557 | strlcpy(dst, src, dstsize); | |
fa64c868 | 558 | return (dst); |
564dd50a | 559 | } |
560 | ||
d1cf9a87 | 561 | /* |
fa64c868 | 562 | * line_abbrevname(): Return the abbreviated (usually four-character) |
564dd50a | 563 | * form of the line (Just use the last <dstsize> characters of the |
564 | * full name.) | |
565 | * | |
566 | * NOTE: use strncpy because we do NOT necessarily want zero | |
fa64c868 | 567 | * termination |
568 | */ | |
1d7b9b20 | 569 | char * |
2b87da3b | 570 | line_abbrevname(char *dst, const char *src, int dstsize) |
a05a70ab | 571 | { |
572 | size_t len; | |
2b87da3b | 573 | |
1d7b9b20 | 574 | memset(dst, '\0', dstsize); |
2b87da3b | 575 | |
daaff4d5 | 576 | /* Always skip prefix if present */ |
577 | if (strncmp(src, "/dev/", 5) == 0) | |
578 | src += 5; | |
2b87da3b | 579 | |
0e8f4eba | 580 | #ifdef WITH_ABBREV_NO_TTY |
581 | if (strncmp(src, "tty", 3) == 0) | |
582 | src += 3; | |
583 | #endif | |
584 | ||
a05a70ab | 585 | len = strlen(src); |
586 | ||
daaff4d5 | 587 | if (len > 0) { |
588 | if (((int)len - dstsize) > 0) | |
589 | src += ((int)len - dstsize); | |
590 | ||
591 | /* note: _don't_ change this to strlcpy */ | |
2b87da3b | 592 | strncpy(dst, src, (size_t)dstsize); |
a05a70ab | 593 | } |
2b87da3b | 594 | |
fa64c868 | 595 | return (dst); |
1d7b9b20 | 596 | } |
597 | ||
1d7b9b20 | 598 | /** |
599 | ** utmp utility functions | |
564dd50a | 600 | ** |
601 | ** These functions manipulate struct utmp, taking system differences | |
602 | ** into account. | |
1d7b9b20 | 603 | **/ |
604 | ||
605 | #if defined(USE_UTMP) || defined (USE_WTMP) || defined (USE_LOGIN) | |
606 | ||
1d7b9b20 | 607 | /* build the utmp structure */ |
608 | void | |
564dd50a | 609 | set_utmp_time(struct logininfo *li, struct utmp *ut) |
610 | { | |
fa64c868 | 611 | # if defined(HAVE_TV_IN_UTMP) |
1d7b9b20 | 612 | ut->ut_tv.tv_sec = li->tv_sec; |
613 | ut->ut_tv.tv_usec = li->tv_usec; | |
fa64c868 | 614 | # elif defined(HAVE_TIME_IN_UTMP) |
1d7b9b20 | 615 | ut->ut_time = li->tv_sec; |
a05a70ab | 616 | # endif |
1d7b9b20 | 617 | } |
618 | ||
619 | void | |
620 | construct_utmp(struct logininfo *li, | |
564dd50a | 621 | struct utmp *ut) |
622 | { | |
9746ee4b | 623 | # ifdef HAVE_ADDR_V6_IN_UTMP |
624 | struct sockaddr_in6 *sa6; | |
fa64c868 | 625 | # endif |
626 | ||
dbaa2e87 | 627 | memset(ut, '\0', sizeof(*ut)); |
5abcdf8e | 628 | |
629 | /* First fill out fields used for both logins and logouts */ | |
630 | ||
a05a70ab | 631 | # ifdef HAVE_ID_IN_UTMP |
1d7b9b20 | 632 | line_abbrevname(ut->ut_id, li->line, sizeof(ut->ut_id)); |
a05a70ab | 633 | # endif |
1d7b9b20 | 634 | |
a05a70ab | 635 | # ifdef HAVE_TYPE_IN_UTMP |
5abcdf8e | 636 | /* This is done here to keep utmp constants out of struct logininfo */ |
1d7b9b20 | 637 | switch (li->type) { |
638 | case LTYPE_LOGIN: | |
639 | ut->ut_type = USER_PROCESS; | |
ef51930f | 640 | #ifdef _UNICOS |
1a23ac2c | 641 | cray_set_tmpdir(ut); |
642 | #endif | |
1d7b9b20 | 643 | break; |
644 | case LTYPE_LOGOUT: | |
645 | ut->ut_type = DEAD_PROCESS; | |
ef51930f | 646 | #ifdef _UNICOS |
1a23ac2c | 647 | cray_retain_utmp(ut, li->pid); |
648 | #endif | |
1d7b9b20 | 649 | break; |
650 | } | |
a05a70ab | 651 | # endif |
5abcdf8e | 652 | set_utmp_time(li, ut); |
1d7b9b20 | 653 | |
5abcdf8e | 654 | line_stripname(ut->ut_line, li->line, sizeof(ut->ut_line)); |
a05a70ab | 655 | |
656 | # ifdef HAVE_PID_IN_UTMP | |
1d7b9b20 | 657 | ut->ut_pid = li->pid; |
a05a70ab | 658 | # endif |
5abcdf8e | 659 | |
660 | /* If we're logging out, leave all other fields blank */ | |
661 | if (li->type == LTYPE_LOGOUT) | |
fa64c868 | 662 | return; |
5abcdf8e | 663 | |
a05a70ab | 664 | /* |
665 | * These fields are only used when logging in, and are blank | |
2b87da3b | 666 | * for logouts. |
a05a70ab | 667 | */ |
5abcdf8e | 668 | |
669 | /* Use strncpy because we don't necessarily want null termination */ | |
fa64c868 | 670 | strncpy(ut->ut_name, li->username, |
671 | MIN_SIZEOF(ut->ut_name, li->username)); | |
a05a70ab | 672 | # ifdef HAVE_HOST_IN_UTMP |
fa64c868 | 673 | strncpy(ut->ut_host, li->hostname, |
674 | MIN_SIZEOF(ut->ut_host, li->hostname)); | |
a05a70ab | 675 | # endif |
676 | # ifdef HAVE_ADDR_IN_UTMP | |
564dd50a | 677 | /* this is just a 32-bit IP address */ |
678 | if (li->hostaddr.sa.sa_family == AF_INET) | |
679 | ut->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr; | |
2b87da3b | 680 | # endif |
9746ee4b | 681 | # ifdef HAVE_ADDR_V6_IN_UTMP |
682 | /* this is just a 128-bit IPv6 address */ | |
683 | if (li->hostaddr.sa.sa_family == AF_INET6) { | |
684 | sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa); | |
685 | memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16); | |
686 | if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) { | |
687 | ut->ut_addr_v6[0] = ut->ut_addr_v6[3]; | |
688 | ut->ut_addr_v6[1] = 0; | |
689 | ut->ut_addr_v6[2] = 0; | |
690 | ut->ut_addr_v6[3] = 0; | |
691 | } | |
692 | } | |
693 | # endif | |
564dd50a | 694 | } |
a05a70ab | 695 | #endif /* USE_UTMP || USE_WTMP || USE_LOGIN */ |
564dd50a | 696 | |
1d7b9b20 | 697 | /** |
698 | ** utmpx utility functions | |
564dd50a | 699 | ** |
700 | ** These functions manipulate struct utmpx, accounting for system | |
701 | ** variations. | |
1d7b9b20 | 702 | **/ |
703 | ||
704 | #if defined(USE_UTMPX) || defined (USE_WTMPX) | |
1d7b9b20 | 705 | /* build the utmpx structure */ |
706 | void | |
564dd50a | 707 | set_utmpx_time(struct logininfo *li, struct utmpx *utx) |
708 | { | |
fa64c868 | 709 | # if defined(HAVE_TV_IN_UTMPX) |
1d7b9b20 | 710 | utx->ut_tv.tv_sec = li->tv_sec; |
711 | utx->ut_tv.tv_usec = li->tv_usec; | |
fa64c868 | 712 | # elif defined(HAVE_TIME_IN_UTMPX) |
1d7b9b20 | 713 | utx->ut_time = li->tv_sec; |
fa64c868 | 714 | # endif |
1d7b9b20 | 715 | } |
716 | ||
717 | void | |
564dd50a | 718 | construct_utmpx(struct logininfo *li, struct utmpx *utx) |
719 | { | |
9746ee4b | 720 | # ifdef HAVE_ADDR_V6_IN_UTMP |
721 | struct sockaddr_in6 *sa6; | |
722 | # endif | |
dbaa2e87 | 723 | memset(utx, '\0', sizeof(*utx)); |
fa64c868 | 724 | |
daaff4d5 | 725 | # ifdef HAVE_ID_IN_UTMPX |
1d7b9b20 | 726 | line_abbrevname(utx->ut_id, li->line, sizeof(utx->ut_id)); |
daaff4d5 | 727 | # endif |
1d7b9b20 | 728 | |
729 | /* this is done here to keep utmp constants out of loginrec.h */ | |
730 | switch (li->type) { | |
731 | case LTYPE_LOGIN: | |
732 | utx->ut_type = USER_PROCESS; | |
733 | break; | |
734 | case LTYPE_LOGOUT: | |
735 | utx->ut_type = DEAD_PROCESS; | |
736 | break; | |
737 | } | |
1d7b9b20 | 738 | line_stripname(utx->ut_line, li->line, sizeof(utx->ut_line)); |
1d7b9b20 | 739 | set_utmpx_time(li, utx); |
5abcdf8e | 740 | utx->ut_pid = li->pid; |
fa64c868 | 741 | |
f3837bc6 | 742 | /* strncpy(): Don't necessarily want null termination */ |
fa64c868 | 743 | strncpy(utx->ut_name, li->username, |
744 | MIN_SIZEOF(utx->ut_name, li->username)); | |
5abcdf8e | 745 | |
746 | if (li->type == LTYPE_LOGOUT) | |
747 | return; | |
748 | ||
a05a70ab | 749 | /* |
750 | * These fields are only used when logging in, and are blank | |
2b87da3b | 751 | * for logouts. |
a05a70ab | 752 | */ |
5abcdf8e | 753 | |
a05a70ab | 754 | # ifdef HAVE_HOST_IN_UTMPX |
fa64c868 | 755 | strncpy(utx->ut_host, li->hostname, |
756 | MIN_SIZEOF(utx->ut_host, li->hostname)); | |
a05a70ab | 757 | # endif |
758 | # ifdef HAVE_ADDR_IN_UTMPX | |
764d4113 | 759 | /* this is just a 32-bit IP address */ |
760 | if (li->hostaddr.sa.sa_family == AF_INET) | |
761 | utx->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr; | |
a05a70ab | 762 | # endif |
9746ee4b | 763 | # ifdef HAVE_ADDR_V6_IN_UTMP |
764 | /* this is just a 128-bit IPv6 address */ | |
765 | if (li->hostaddr.sa.sa_family == AF_INET6) { | |
766 | sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa); | |
767 | memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16); | |
768 | if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) { | |
769 | ut->ut_addr_v6[0] = ut->ut_addr_v6[3]; | |
770 | ut->ut_addr_v6[1] = 0; | |
771 | ut->ut_addr_v6[2] = 0; | |
772 | ut->ut_addr_v6[3] = 0; | |
773 | } | |
774 | } | |
775 | # endif | |
a05a70ab | 776 | # ifdef HAVE_SYSLEN_IN_UTMPX |
5abcdf8e | 777 | /* ut_syslen is the length of the utx_host string */ |
778 | utx->ut_syslen = MIN(strlen(li->hostname), sizeof(utx->ut_host)); | |
a05a70ab | 779 | # endif |
564dd50a | 780 | } |
a05a70ab | 781 | #endif /* USE_UTMPX || USE_WTMPX */ |
1d7b9b20 | 782 | |
783 | /** | |
564dd50a | 784 | ** Low-level utmp functions |
1d7b9b20 | 785 | **/ |
786 | ||
787 | /* FIXME: (ATL) utmp_write_direct needs testing */ | |
1d7b9b20 | 788 | #ifdef USE_UTMP |
789 | ||
1d7b9b20 | 790 | /* if we can, use pututline() etc. */ |
a05a70ab | 791 | # if !defined(DISABLE_PUTUTLINE) && defined(HAVE_SETUTENT) && \ |
792 | defined(HAVE_PUTUTLINE) | |
1d7b9b20 | 793 | # define UTMP_USE_LIBRARY |
a05a70ab | 794 | # endif |
1d7b9b20 | 795 | |
796 | ||
797 | /* write a utmp entry with the system's help (pututline() and pals) */ | |
a05a70ab | 798 | # ifdef UTMP_USE_LIBRARY |
1d7b9b20 | 799 | static int |
564dd50a | 800 | utmp_write_library(struct logininfo *li, struct utmp *ut) |
801 | { | |
1d7b9b20 | 802 | setutent(); |
803 | pututline(ut); | |
a05a70ab | 804 | # ifdef HAVE_ENDUTENT |
1d7b9b20 | 805 | endutent(); |
a05a70ab | 806 | # endif |
fa64c868 | 807 | return (1); |
564dd50a | 808 | } |
a05a70ab | 809 | # else /* UTMP_USE_LIBRARY */ |
1d7b9b20 | 810 | |
d1cf9a87 | 811 | /* |
fa64c868 | 812 | * Write a utmp entry direct to the file |
813 | * This is a slightly modification of code in OpenBSD's login.c | |
814 | */ | |
1d7b9b20 | 815 | static int |
564dd50a | 816 | utmp_write_direct(struct logininfo *li, struct utmp *ut) |
817 | { | |
1d7b9b20 | 818 | struct utmp old_ut; |
819 | register int fd; | |
820 | int tty; | |
821 | ||
5abcdf8e | 822 | /* FIXME: (ATL) ttyslot() needs local implementation */ |
dbaa2e87 | 823 | |
698d107e | 824 | #if defined(HAVE_GETTTYENT) |
fa64c868 | 825 | struct ttyent *ty; |
dbaa2e87 | 826 | |
827 | tty=0; | |
dbaa2e87 | 828 | setttyent(); |
fa64c868 | 829 | while (NULL != (ty = getttyent())) { |
dbaa2e87 | 830 | tty++; |
831 | if (!strncmp(ty->ty_name, ut->ut_line, sizeof(ut->ut_line))) | |
832 | break; | |
833 | } | |
834 | endttyent(); | |
835 | ||
fa64c868 | 836 | if (NULL == ty) { |
5f12e050 | 837 | logit("%s: tty not found", __func__); |
838 | return (0); | |
dbaa2e87 | 839 | } |
840 | #else /* FIXME */ | |
841 | ||
1d7b9b20 | 842 | tty = ttyslot(); /* seems only to work for /dev/ttyp? style names */ |
843 | ||
698d107e | 844 | #endif /* HAVE_GETTTYENT */ |
dbaa2e87 | 845 | |
1d7b9b20 | 846 | if (tty > 0 && (fd = open(UTMP_FILE, O_RDWR|O_CREAT, 0644)) >= 0) { |
5f12e050 | 847 | off_t pos, ret; |
848 | ||
849 | pos = (off_t)tty * sizeof(struct utmp); | |
850 | if ((ret = lseek(fd, pos, SEEK_SET)) == -1) { | |
f6d20d59 | 851 | logit("%s: lseek: %s", __func__, strerror(errno)); |
5f12e050 | 852 | return (0); |
853 | } | |
854 | if (ret != pos) { | |
d1cf9a87 | 855 | logit("%s: Couldn't seek to tty %d slot in %s", |
f6d20d59 | 856 | __func__, tty, UTMP_FILE); |
5f12e050 | 857 | return (0); |
858 | } | |
1d7b9b20 | 859 | /* |
860 | * Prevent luser from zero'ing out ut_host. | |
861 | * If the new ut_line is empty but the old one is not | |
dc2a6d09 | 862 | * and ut_line and ut_name match, preserve the old ut_line. |
1d7b9b20 | 863 | */ |
2b87da3b | 864 | if (atomicio(read, fd, &old_ut, sizeof(old_ut)) == sizeof(old_ut) && |
fa64c868 | 865 | (ut->ut_host[0] == '\0') && (old_ut.ut_host[0] != '\0') && |
866 | (strncmp(old_ut.ut_line, ut->ut_line, sizeof(ut->ut_line)) == 0) && | |
867 | (strncmp(old_ut.ut_name, ut->ut_name, sizeof(ut->ut_name)) == 0)) | |
868 | memcpy(ut->ut_host, old_ut.ut_host, sizeof(ut->ut_host)); | |
2b87da3b | 869 | |
5f12e050 | 870 | if ((ret = lseek(fd, pos, SEEK_SET)) == -1) { |
f6d20d59 | 871 | logit("%s: lseek: %s", __func__, strerror(errno)); |
5f12e050 | 872 | return (0); |
873 | } | |
874 | if (ret != pos) { | |
f6d20d59 | 875 | logit("%s: Couldn't seek to tty %d slot in %s", |
5f12e050 | 876 | __func__, tty, UTMP_FILE); |
877 | return (0); | |
878 | } | |
fa64c868 | 879 | if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) { |
5f12e050 | 880 | logit("%s: error writing %s: %s", __func__, |
5abcdf8e | 881 | UTMP_FILE, strerror(errno)); |
fa64c868 | 882 | } |
2b87da3b | 883 | |
fa64c868 | 884 | close(fd); |
885 | return (1); | |
9f32ceb4 | 886 | } else { |
fa64c868 | 887 | return (0); |
9f32ceb4 | 888 | } |
564dd50a | 889 | } |
a05a70ab | 890 | # endif /* UTMP_USE_LIBRARY */ |
1d7b9b20 | 891 | |
892 | static int | |
564dd50a | 893 | utmp_perform_login(struct logininfo *li) |
894 | { | |
1d7b9b20 | 895 | struct utmp ut; |
896 | ||
897 | construct_utmp(li, &ut); | |
a05a70ab | 898 | # ifdef UTMP_USE_LIBRARY |
1d7b9b20 | 899 | if (!utmp_write_library(li, &ut)) { |
a233586b | 900 | logit("%s: utmp_write_library() failed", __func__); |
fa64c868 | 901 | return (0); |
1d7b9b20 | 902 | } |
a05a70ab | 903 | # else |
1d7b9b20 | 904 | if (!utmp_write_direct(li, &ut)) { |
a233586b | 905 | logit("%s: utmp_write_direct() failed", __func__); |
fa64c868 | 906 | return (0); |
1d7b9b20 | 907 | } |
a05a70ab | 908 | # endif |
fa64c868 | 909 | return (1); |
564dd50a | 910 | } |
1d7b9b20 | 911 | |
912 | ||
913 | static int | |
564dd50a | 914 | utmp_perform_logout(struct logininfo *li) |
915 | { | |
1d7b9b20 | 916 | struct utmp ut; |
917 | ||
5abcdf8e | 918 | construct_utmp(li, &ut); |
a05a70ab | 919 | # ifdef UTMP_USE_LIBRARY |
5abcdf8e | 920 | if (!utmp_write_library(li, &ut)) { |
a233586b | 921 | logit("%s: utmp_write_library() failed", __func__); |
fa64c868 | 922 | return (0); |
5abcdf8e | 923 | } |
a05a70ab | 924 | # else |
5abcdf8e | 925 | if (!utmp_write_direct(li, &ut)) { |
a233586b | 926 | logit("%s: utmp_write_direct() failed", __func__); |
fa64c868 | 927 | return (0); |
5abcdf8e | 928 | } |
a05a70ab | 929 | # endif |
fa64c868 | 930 | return (1); |
564dd50a | 931 | } |
1d7b9b20 | 932 | |
933 | ||
934 | int | |
564dd50a | 935 | utmp_write_entry(struct logininfo *li) |
936 | { | |
1d7b9b20 | 937 | switch(li->type) { |
938 | case LTYPE_LOGIN: | |
fa64c868 | 939 | return (utmp_perform_login(li)); |
1d7b9b20 | 940 | |
941 | case LTYPE_LOGOUT: | |
fa64c868 | 942 | return (utmp_perform_logout(li)); |
1d7b9b20 | 943 | |
944 | default: | |
a233586b | 945 | logit("%s: invalid type field", __func__); |
fa64c868 | 946 | return (0); |
1d7b9b20 | 947 | } |
564dd50a | 948 | } |
a05a70ab | 949 | #endif /* USE_UTMP */ |
1d7b9b20 | 950 | |
951 | ||
952 | /** | |
564dd50a | 953 | ** Low-level utmpx functions |
1d7b9b20 | 954 | **/ |
955 | ||
956 | /* not much point if we don't want utmpx entries */ | |
957 | #ifdef USE_UTMPX | |
958 | ||
1d7b9b20 | 959 | /* if we have the wherewithall, use pututxline etc. */ |
a05a70ab | 960 | # if !defined(DISABLE_PUTUTXLINE) && defined(HAVE_SETUTXENT) && \ |
961 | defined(HAVE_PUTUTXLINE) | |
1d7b9b20 | 962 | # define UTMPX_USE_LIBRARY |
a05a70ab | 963 | # endif |
1d7b9b20 | 964 | |
965 | ||
966 | /* write a utmpx entry with the system's help (pututxline() and pals) */ | |
a05a70ab | 967 | # ifdef UTMPX_USE_LIBRARY |
1d7b9b20 | 968 | static int |
564dd50a | 969 | utmpx_write_library(struct logininfo *li, struct utmpx *utx) |
970 | { | |
1d7b9b20 | 971 | setutxent(); |
972 | pututxline(utx); | |
973 | ||
a05a70ab | 974 | # ifdef HAVE_ENDUTXENT |
1d7b9b20 | 975 | endutxent(); |
a05a70ab | 976 | # endif |
fa64c868 | 977 | return (1); |
564dd50a | 978 | } |
1d7b9b20 | 979 | |
a05a70ab | 980 | # else /* UTMPX_USE_LIBRARY */ |
1d7b9b20 | 981 | |
982 | /* write a utmp entry direct to the file */ | |
983 | static int | |
564dd50a | 984 | utmpx_write_direct(struct logininfo *li, struct utmpx *utx) |
2b87da3b | 985 | { |
a233586b | 986 | logit("%s: not implemented!", __func__); |
fa64c868 | 987 | return (0); |
564dd50a | 988 | } |
a05a70ab | 989 | # endif /* UTMPX_USE_LIBRARY */ |
1d7b9b20 | 990 | |
991 | static int | |
564dd50a | 992 | utmpx_perform_login(struct logininfo *li) |
993 | { | |
1d7b9b20 | 994 | struct utmpx utx; |
995 | ||
996 | construct_utmpx(li, &utx); | |
a05a70ab | 997 | # ifdef UTMPX_USE_LIBRARY |
1d7b9b20 | 998 | if (!utmpx_write_library(li, &utx)) { |
a233586b | 999 | logit("%s: utmp_write_library() failed", __func__); |
fa64c868 | 1000 | return (0); |
1d7b9b20 | 1001 | } |
a05a70ab | 1002 | # else |
1d7b9b20 | 1003 | if (!utmpx_write_direct(li, &ut)) { |
a233586b | 1004 | logit("%s: utmp_write_direct() failed", __func__); |
fa64c868 | 1005 | return (0); |
1d7b9b20 | 1006 | } |
a05a70ab | 1007 | # endif |
fa64c868 | 1008 | return (1); |
564dd50a | 1009 | } |
1d7b9b20 | 1010 | |
1011 | ||
1012 | static int | |
564dd50a | 1013 | utmpx_perform_logout(struct logininfo *li) |
1014 | { | |
1d7b9b20 | 1015 | struct utmpx utx; |
1016 | ||
f3837bc6 | 1017 | construct_utmpx(li, &utx); |
a05a70ab | 1018 | # ifdef HAVE_ID_IN_UTMPX |
1d7b9b20 | 1019 | line_abbrevname(utx.ut_id, li->line, sizeof(utx.ut_id)); |
a05a70ab | 1020 | # endif |
1021 | # ifdef HAVE_TYPE_IN_UTMPX | |
1d7b9b20 | 1022 | utx.ut_type = DEAD_PROCESS; |
a05a70ab | 1023 | # endif |
1d7b9b20 | 1024 | |
a05a70ab | 1025 | # ifdef UTMPX_USE_LIBRARY |
1d7b9b20 | 1026 | utmpx_write_library(li, &utx); |
a05a70ab | 1027 | # else |
1d7b9b20 | 1028 | utmpx_write_direct(li, &utx); |
a05a70ab | 1029 | # endif |
fa64c868 | 1030 | return (1); |
564dd50a | 1031 | } |
1d7b9b20 | 1032 | |
1d7b9b20 | 1033 | int |
564dd50a | 1034 | utmpx_write_entry(struct logininfo *li) |
1035 | { | |
1d7b9b20 | 1036 | switch(li->type) { |
1037 | case LTYPE_LOGIN: | |
fa64c868 | 1038 | return (utmpx_perform_login(li)); |
1d7b9b20 | 1039 | case LTYPE_LOGOUT: |
fa64c868 | 1040 | return (utmpx_perform_logout(li)); |
1d7b9b20 | 1041 | default: |
a233586b | 1042 | logit("%s: invalid type field", __func__); |
fa64c868 | 1043 | return (0); |
1d7b9b20 | 1044 | } |
564dd50a | 1045 | } |
a05a70ab | 1046 | #endif /* USE_UTMPX */ |
1d7b9b20 | 1047 | |
1048 | ||
1049 | /** | |
564dd50a | 1050 | ** Low-level wtmp functions |
1d7b9b20 | 1051 | **/ |
1052 | ||
2b87da3b | 1053 | #ifdef USE_WTMP |
1d7b9b20 | 1054 | |
d1cf9a87 | 1055 | /* |
fa64c868 | 1056 | * Write a wtmp entry direct to the end of the file |
1057 | * This is a slight modification of code in OpenBSD's logwtmp.c | |
1058 | */ | |
1d7b9b20 | 1059 | static int |
564dd50a | 1060 | wtmp_write(struct logininfo *li, struct utmp *ut) |
1061 | { | |
1d7b9b20 | 1062 | struct stat buf; |
1063 | int fd, ret = 1; | |
1064 | ||
1065 | if ((fd = open(WTMP_FILE, O_WRONLY|O_APPEND, 0)) < 0) { | |
a233586b | 1066 | logit("%s: problem writing %s: %s", __func__, |
1d7b9b20 | 1067 | WTMP_FILE, strerror(errno)); |
fa64c868 | 1068 | return (0); |
1d7b9b20 | 1069 | } |
2b87da3b | 1070 | if (fstat(fd, &buf) == 0) |
d72f7b79 | 1071 | if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) { |
1d7b9b20 | 1072 | ftruncate(fd, buf.st_size); |
a233586b | 1073 | logit("%s: problem writing %s: %s", __func__, |
1d7b9b20 | 1074 | WTMP_FILE, strerror(errno)); |
1075 | ret = 0; | |
1076 | } | |
fa64c868 | 1077 | close(fd); |
1078 | return (ret); | |
564dd50a | 1079 | } |
1d7b9b20 | 1080 | |
1d7b9b20 | 1081 | static int |
a05a70ab | 1082 | wtmp_perform_login(struct logininfo *li) |
1083 | { | |
1d7b9b20 | 1084 | struct utmp ut; |
1085 | ||
1086 | construct_utmp(li, &ut); | |
fa64c868 | 1087 | return (wtmp_write(li, &ut)); |
564dd50a | 1088 | } |
1d7b9b20 | 1089 | |
1090 | ||
1091 | static int | |
564dd50a | 1092 | wtmp_perform_logout(struct logininfo *li) |
1093 | { | |
1d7b9b20 | 1094 | struct utmp ut; |
1095 | ||
1096 | construct_utmp(li, &ut); | |
fa64c868 | 1097 | return (wtmp_write(li, &ut)); |
564dd50a | 1098 | } |
1d7b9b20 | 1099 | |
1100 | ||
1101 | int | |
564dd50a | 1102 | wtmp_write_entry(struct logininfo *li) |
1103 | { | |
1d7b9b20 | 1104 | switch(li->type) { |
1105 | case LTYPE_LOGIN: | |
fa64c868 | 1106 | return (wtmp_perform_login(li)); |
1d7b9b20 | 1107 | case LTYPE_LOGOUT: |
fa64c868 | 1108 | return (wtmp_perform_logout(li)); |
1d7b9b20 | 1109 | default: |
a233586b | 1110 | logit("%s: invalid type field", __func__); |
fa64c868 | 1111 | return (0); |
1d7b9b20 | 1112 | } |
564dd50a | 1113 | } |
1d7b9b20 | 1114 | |
1115 | ||
d1cf9a87 | 1116 | /* |
fa64c868 | 1117 | * Notes on fetching login data from wtmp/wtmpx |
2b87da3b | 1118 | * |
5abcdf8e | 1119 | * Logouts are usually recorded with (amongst other things) a blank |
1120 | * username on a given tty line. However, some systems (HP-UX is one) | |
1121 | * leave all fields set, but change the ut_type field to DEAD_PROCESS. | |
1122 | * | |
1123 | * Since we're only looking for logins here, we know that the username | |
1124 | * must be set correctly. On systems that leave it in, we check for | |
1125 | * ut_type==USER_PROCESS (indicating a login.) | |
1126 | * | |
1127 | * Portability: Some systems may set something other than USER_PROCESS | |
1128 | * to indicate a login process. I don't know of any as I write. Also, | |
1129 | * it's possible that some systems may both leave the username in | |
1130 | * place and not have ut_type. | |
1131 | */ | |
1132 | ||
5abcdf8e | 1133 | /* return true if this wtmp entry indicates a login */ |
1134 | static int | |
1135 | wtmp_islogin(struct logininfo *li, struct utmp *ut) | |
1136 | { | |
2b87da3b | 1137 | if (strncmp(li->username, ut->ut_name, |
fa64c868 | 1138 | MIN_SIZEOF(li->username, ut->ut_name)) == 0) { |
a05a70ab | 1139 | # ifdef HAVE_TYPE_IN_UTMP |
5abcdf8e | 1140 | if (ut->ut_type & USER_PROCESS) |
fa64c868 | 1141 | return (1); |
a05a70ab | 1142 | # else |
fa64c868 | 1143 | return (1); |
a05a70ab | 1144 | # endif |
5abcdf8e | 1145 | } |
fa64c868 | 1146 | return (0); |
5abcdf8e | 1147 | } |
1148 | ||
1d7b9b20 | 1149 | int |
564dd50a | 1150 | wtmp_get_entry(struct logininfo *li) |
1151 | { | |
1d7b9b20 | 1152 | struct stat st; |
1153 | struct utmp ut; | |
fa64c868 | 1154 | int fd, found = 0; |
5abcdf8e | 1155 | |
1156 | /* Clear the time entries in our logininfo */ | |
1157 | li->tv_sec = li->tv_usec = 0; | |
1d7b9b20 | 1158 | |
1159 | if ((fd = open(WTMP_FILE, O_RDONLY)) < 0) { | |
d1cf9a87 | 1160 | logit("%s: problem opening %s: %s", __func__, |
1d7b9b20 | 1161 | WTMP_FILE, strerror(errno)); |
fa64c868 | 1162 | return (0); |
1d7b9b20 | 1163 | } |
2b87da3b | 1164 | if (fstat(fd, &st) != 0) { |
d1cf9a87 | 1165 | logit("%s: couldn't stat %s: %s", __func__, |
1d7b9b20 | 1166 | WTMP_FILE, strerror(errno)); |
1167 | close(fd); | |
fa64c868 | 1168 | return (0); |
1d7b9b20 | 1169 | } |
1d7b9b20 | 1170 | |
5abcdf8e | 1171 | /* Seek to the start of the last struct utmp */ |
d9d47a26 | 1172 | if (lseek(fd, -(off_t)sizeof(struct utmp), SEEK_END) == -1) { |
5abcdf8e | 1173 | /* Looks like we've got a fresh wtmp file */ |
1174 | close(fd); | |
fa64c868 | 1175 | return (0); |
5abcdf8e | 1176 | } |
1177 | ||
1178 | while (!found) { | |
9f32ceb4 | 1179 | if (atomicio(read, fd, &ut, sizeof(ut)) != sizeof(ut)) { |
d1cf9a87 | 1180 | logit("%s: read of %s failed: %s", __func__, |
1d7b9b20 | 1181 | WTMP_FILE, strerror(errno)); |
1182 | close (fd); | |
fa64c868 | 1183 | return (0); |
1d7b9b20 | 1184 | } |
5abcdf8e | 1185 | if ( wtmp_islogin(li, &ut) ) { |
1186 | found = 1; | |
fa64c868 | 1187 | /* |
1188 | * We've already checked for a time in struct | |
1189 | * utmp, in login_getlast() | |
1190 | */ | |
a05a70ab | 1191 | # ifdef HAVE_TIME_IN_UTMP |
1d7b9b20 | 1192 | li->tv_sec = ut.ut_time; |
a05a70ab | 1193 | # else |
1d7b9b20 | 1194 | # if HAVE_TV_IN_UTMP |
1195 | li->tv_sec = ut.ut_tv.tv_sec; | |
1196 | # endif | |
a05a70ab | 1197 | # endif |
5abcdf8e | 1198 | line_fullname(li->line, ut.ut_line, |
fa64c868 | 1199 | MIN_SIZEOF(li->line, ut.ut_line)); |
a05a70ab | 1200 | # ifdef HAVE_HOST_IN_UTMP |
5abcdf8e | 1201 | strlcpy(li->hostname, ut.ut_host, |
fa64c868 | 1202 | MIN_SIZEOF(li->hostname, ut.ut_host)); |
a05a70ab | 1203 | # endif |
5abcdf8e | 1204 | continue; |
1d7b9b20 | 1205 | } |
5abcdf8e | 1206 | /* Seek back 2 x struct utmp */ |
d9d47a26 | 1207 | if (lseek(fd, -(off_t)(2 * sizeof(struct utmp)), SEEK_CUR) == -1) { |
5abcdf8e | 1208 | /* We've found the start of the file, so quit */ |
fa64c868 | 1209 | close(fd); |
1210 | return (0); | |
1d7b9b20 | 1211 | } |
5abcdf8e | 1212 | } |
1213 | ||
1214 | /* We found an entry. Tidy up and return */ | |
1215 | close(fd); | |
fa64c868 | 1216 | return (1); |
564dd50a | 1217 | } |
a05a70ab | 1218 | # endif /* USE_WTMP */ |
1d7b9b20 | 1219 | |
1220 | ||
1221 | /** | |
564dd50a | 1222 | ** Low-level wtmpx functions |
1d7b9b20 | 1223 | **/ |
1224 | ||
1225 | #ifdef USE_WTMPX | |
fa64c868 | 1226 | /* |
1227 | * Write a wtmpx entry direct to the end of the file | |
1228 | * This is a slight modification of code in OpenBSD's logwtmp.c | |
1229 | */ | |
1d7b9b20 | 1230 | static int |
564dd50a | 1231 | wtmpx_write(struct logininfo *li, struct utmpx *utx) |
1232 | { | |
41c64c91 | 1233 | #ifndef HAVE_UPDWTMPX |
1d7b9b20 | 1234 | struct stat buf; |
1235 | int fd, ret = 1; | |
1236 | ||
1237 | if ((fd = open(WTMPX_FILE, O_WRONLY|O_APPEND, 0)) < 0) { | |
d1cf9a87 | 1238 | logit("%s: problem opening %s: %s", __func__, |
1d7b9b20 | 1239 | WTMPX_FILE, strerror(errno)); |
fa64c868 | 1240 | return (0); |
1d7b9b20 | 1241 | } |
1242 | ||
2b87da3b | 1243 | if (fstat(fd, &buf) == 0) |
d72f7b79 | 1244 | if (atomicio(vwrite, fd, utx, sizeof(*utx)) != sizeof(*utx)) { |
1d7b9b20 | 1245 | ftruncate(fd, buf.st_size); |
a233586b | 1246 | logit("%s: problem writing %s: %s", __func__, |
1d7b9b20 | 1247 | WTMPX_FILE, strerror(errno)); |
1248 | ret = 0; | |
1249 | } | |
fa64c868 | 1250 | close(fd); |
1d7b9b20 | 1251 | |
fa64c868 | 1252 | return (ret); |
41c64c91 | 1253 | #else |
1254 | updwtmpx(WTMPX_FILE, utx); | |
fa64c868 | 1255 | return (1); |
41c64c91 | 1256 | #endif |
564dd50a | 1257 | } |
1d7b9b20 | 1258 | |
1259 | ||
1260 | static int | |
564dd50a | 1261 | wtmpx_perform_login(struct logininfo *li) |
1262 | { | |
1d7b9b20 | 1263 | struct utmpx utx; |
1264 | ||
1265 | construct_utmpx(li, &utx); | |
fa64c868 | 1266 | return (wtmpx_write(li, &utx)); |
564dd50a | 1267 | } |
1d7b9b20 | 1268 | |
1269 | ||
1270 | static int | |
564dd50a | 1271 | wtmpx_perform_logout(struct logininfo *li) |
1272 | { | |
1d7b9b20 | 1273 | struct utmpx utx; |
1274 | ||
1275 | construct_utmpx(li, &utx); | |
fa64c868 | 1276 | return (wtmpx_write(li, &utx)); |
564dd50a | 1277 | } |
1d7b9b20 | 1278 | |
1279 | ||
1280 | int | |
564dd50a | 1281 | wtmpx_write_entry(struct logininfo *li) |
1282 | { | |
1d7b9b20 | 1283 | switch(li->type) { |
1284 | case LTYPE_LOGIN: | |
fa64c868 | 1285 | return (wtmpx_perform_login(li)); |
1d7b9b20 | 1286 | case LTYPE_LOGOUT: |
fa64c868 | 1287 | return (wtmpx_perform_logout(li)); |
1d7b9b20 | 1288 | default: |
a233586b | 1289 | logit("%s: invalid type field", __func__); |
fa64c868 | 1290 | return (0); |
1d7b9b20 | 1291 | } |
564dd50a | 1292 | } |
1d7b9b20 | 1293 | |
5abcdf8e | 1294 | /* Please see the notes above wtmp_islogin() for information about the |
1295 | next two functions */ | |
1296 | ||
1297 | /* Return true if this wtmpx entry indicates a login */ | |
1298 | static int | |
1299 | wtmpx_islogin(struct logininfo *li, struct utmpx *utx) | |
1300 | { | |
fa64c868 | 1301 | if (strncmp(li->username, utx->ut_name, |
1302 | MIN_SIZEOF(li->username, utx->ut_name)) == 0 ) { | |
a05a70ab | 1303 | # ifdef HAVE_TYPE_IN_UTMPX |
5abcdf8e | 1304 | if (utx->ut_type == USER_PROCESS) |
fa64c868 | 1305 | return (1); |
a05a70ab | 1306 | # else |
fa64c868 | 1307 | return (1); |
a05a70ab | 1308 | # endif |
5abcdf8e | 1309 | } |
fa64c868 | 1310 | return (0); |
5abcdf8e | 1311 | } |
1312 | ||
1d7b9b20 | 1313 | |
1314 | int | |
564dd50a | 1315 | wtmpx_get_entry(struct logininfo *li) |
1316 | { | |
1d7b9b20 | 1317 | struct stat st; |
1318 | struct utmpx utx; | |
5abcdf8e | 1319 | int fd, found=0; |
1320 | ||
1321 | /* Clear the time entries */ | |
1322 | li->tv_sec = li->tv_usec = 0; | |
1d7b9b20 | 1323 | |
1324 | if ((fd = open(WTMPX_FILE, O_RDONLY)) < 0) { | |
d1cf9a87 | 1325 | logit("%s: problem opening %s: %s", __func__, |
1d7b9b20 | 1326 | WTMPX_FILE, strerror(errno)); |
fa64c868 | 1327 | return (0); |
1d7b9b20 | 1328 | } |
2b87da3b | 1329 | if (fstat(fd, &st) != 0) { |
d1cf9a87 | 1330 | logit("%s: couldn't stat %s: %s", __func__, |
fdebdd4f | 1331 | WTMPX_FILE, strerror(errno)); |
1d7b9b20 | 1332 | close(fd); |
fa64c868 | 1333 | return (0); |
1d7b9b20 | 1334 | } |
2b87da3b | 1335 | |
5abcdf8e | 1336 | /* Seek to the start of the last struct utmpx */ |
d9d47a26 | 1337 | if (lseek(fd, -(off_t)sizeof(struct utmpx), SEEK_END) == -1 ) { |
5abcdf8e | 1338 | /* probably a newly rotated wtmpx file */ |
1339 | close(fd); | |
fa64c868 | 1340 | return (0); |
5abcdf8e | 1341 | } |
1d7b9b20 | 1342 | |
5abcdf8e | 1343 | while (!found) { |
9f32ceb4 | 1344 | if (atomicio(read, fd, &utx, sizeof(utx)) != sizeof(utx)) { |
d1cf9a87 | 1345 | logit("%s: read of %s failed: %s", __func__, |
1d7b9b20 | 1346 | WTMPX_FILE, strerror(errno)); |
1347 | close (fd); | |
fa64c868 | 1348 | return (0); |
1d7b9b20 | 1349 | } |
fa64c868 | 1350 | /* |
d1cf9a87 | 1351 | * Logouts are recorded as a blank username on a particular |
fa64c868 | 1352 | * line. So, we just need to find the username in struct utmpx |
1353 | */ | |
1354 | if (wtmpx_islogin(li, &utx)) { | |
d80063fe | 1355 | found = 1; |
fa64c868 | 1356 | # if defined(HAVE_TV_IN_UTMPX) |
1d7b9b20 | 1357 | li->tv_sec = utx.ut_tv.tv_sec; |
fa64c868 | 1358 | # elif defined(HAVE_TIME_IN_UTMPX) |
1d7b9b20 | 1359 | li->tv_sec = utx.ut_time; |
a05a70ab | 1360 | # endif |
a4d05724 | 1361 | line_fullname(li->line, utx.ut_line, sizeof(li->line)); |
fa64c868 | 1362 | # if defined(HAVE_HOST_IN_UTMPX) |
5abcdf8e | 1363 | strlcpy(li->hostname, utx.ut_host, |
fa64c868 | 1364 | MIN_SIZEOF(li->hostname, utx.ut_host)); |
a05a70ab | 1365 | # endif |
5abcdf8e | 1366 | continue; |
1d7b9b20 | 1367 | } |
d9d47a26 | 1368 | if (lseek(fd, -(off_t)(2 * sizeof(struct utmpx)), SEEK_CUR) == -1) { |
fa64c868 | 1369 | close(fd); |
1370 | return (0); | |
1d7b9b20 | 1371 | } |
5abcdf8e | 1372 | } |
1373 | ||
1374 | close(fd); | |
fa64c868 | 1375 | return (1); |
564dd50a | 1376 | } |
f988dce5 | 1377 | #endif /* USE_WTMPX */ |
1d7b9b20 | 1378 | |
1d7b9b20 | 1379 | /** |
564dd50a | 1380 | ** Low-level libutil login() functions |
1d7b9b20 | 1381 | **/ |
1382 | ||
1383 | #ifdef USE_LOGIN | |
1d7b9b20 | 1384 | static int |
564dd50a | 1385 | syslogin_perform_login(struct logininfo *li) |
1386 | { | |
1d7b9b20 | 1387 | struct utmp *ut; |
1388 | ||
7a52470e | 1389 | ut = xmalloc(sizeof(*ut)); |
1d7b9b20 | 1390 | construct_utmp(li, ut); |
1391 | login(ut); | |
6cef88bc | 1392 | free(ut); |
1d7b9b20 | 1393 | |
fa64c868 | 1394 | return (1); |
564dd50a | 1395 | } |
1d7b9b20 | 1396 | |
564dd50a | 1397 | static int |
1398 | syslogin_perform_logout(struct logininfo *li) | |
1399 | { | |
a05a70ab | 1400 | # ifdef HAVE_LOGOUT |
f20d4564 | 1401 | char line[UT_LINESIZE]; |
2b87da3b | 1402 | |
1d7b9b20 | 1403 | (void)line_stripname(line, li->line, sizeof(line)); |
1404 | ||
fa64c868 | 1405 | if (!logout(line)) |
a233586b | 1406 | logit("%s: logout() returned an error", __func__); |
a05a70ab | 1407 | # ifdef HAVE_LOGWTMP |
fa64c868 | 1408 | else |
1d7b9b20 | 1409 | logwtmp(line, "", ""); |
a05a70ab | 1410 | # endif |
5abcdf8e | 1411 | /* FIXME: (ATL - if the need arises) What to do if we have |
1412 | * login, but no logout? what if logout but no logwtmp? All | |
1413 | * routines are in libutil so they should all be there, | |
1414 | * but... */ | |
a05a70ab | 1415 | # endif |
fa64c868 | 1416 | return (1); |
564dd50a | 1417 | } |
1d7b9b20 | 1418 | |
1d7b9b20 | 1419 | int |
564dd50a | 1420 | syslogin_write_entry(struct logininfo *li) |
1421 | { | |
1d7b9b20 | 1422 | switch (li->type) { |
1423 | case LTYPE_LOGIN: | |
fa64c868 | 1424 | return (syslogin_perform_login(li)); |
1d7b9b20 | 1425 | case LTYPE_LOGOUT: |
fa64c868 | 1426 | return (syslogin_perform_logout(li)); |
1d7b9b20 | 1427 | default: |
a233586b | 1428 | logit("%s: Invalid type field", __func__); |
fa64c868 | 1429 | return (0); |
1d7b9b20 | 1430 | } |
564dd50a | 1431 | } |
f988dce5 | 1432 | #endif /* USE_LOGIN */ |
1d7b9b20 | 1433 | |
1434 | /* end of file log-syslogin.c */ | |
1435 | ||
1d7b9b20 | 1436 | /** |
564dd50a | 1437 | ** Low-level lastlog functions |
1d7b9b20 | 1438 | **/ |
1439 | ||
1440 | #ifdef USE_LASTLOG | |
a05a70ab | 1441 | #define LL_FILE 1 |
1442 | #define LL_DIR 2 | |
1443 | #define LL_OTHER 3 | |
1d7b9b20 | 1444 | |
1d7b9b20 | 1445 | static void |
564dd50a | 1446 | lastlog_construct(struct logininfo *li, struct lastlog *last) |
1447 | { | |
1d7b9b20 | 1448 | /* clear the structure */ |
dbaa2e87 | 1449 | memset(last, '\0', sizeof(*last)); |
2b87da3b | 1450 | |
fa64c868 | 1451 | line_stripname(last->ll_line, li->line, sizeof(last->ll_line)); |
5abcdf8e | 1452 | strlcpy(last->ll_host, li->hostname, |
1453 | MIN_SIZEOF(last->ll_host, li->hostname)); | |
1d7b9b20 | 1454 | last->ll_time = li->tv_sec; |
564dd50a | 1455 | } |
1d7b9b20 | 1456 | |
1d7b9b20 | 1457 | static int |
564dd50a | 1458 | lastlog_filetype(char *filename) |
1459 | { | |
1d7b9b20 | 1460 | struct stat st; |
1461 | ||
a05a70ab | 1462 | if (stat(LASTLOG_FILE, &st) != 0) { |
a233586b | 1463 | logit("%s: Couldn't stat %s: %s", __func__, |
fa64c868 | 1464 | LASTLOG_FILE, strerror(errno)); |
1465 | return (0); | |
1d7b9b20 | 1466 | } |
1d7b9b20 | 1467 | if (S_ISDIR(st.st_mode)) |
fa64c868 | 1468 | return (LL_DIR); |
1d7b9b20 | 1469 | else if (S_ISREG(st.st_mode)) |
fa64c868 | 1470 | return (LL_FILE); |
1d7b9b20 | 1471 | else |
fa64c868 | 1472 | return (LL_OTHER); |
564dd50a | 1473 | } |
1d7b9b20 | 1474 | |
1475 | ||
1476 | /* open the file (using filemode) and seek to the login entry */ | |
1477 | static int | |
564dd50a | 1478 | lastlog_openseek(struct logininfo *li, int *fd, int filemode) |
1479 | { | |
1d7b9b20 | 1480 | off_t offset; |
1481 | int type; | |
1482 | char lastlog_file[1024]; | |
1483 | ||
1484 | type = lastlog_filetype(LASTLOG_FILE); | |
1485 | switch (type) { | |
fa64c868 | 1486 | case LL_FILE: |
1487 | strlcpy(lastlog_file, LASTLOG_FILE, | |
1488 | sizeof(lastlog_file)); | |
1489 | break; | |
1490 | case LL_DIR: | |
1491 | snprintf(lastlog_file, sizeof(lastlog_file), "%s/%s", | |
1492 | LASTLOG_FILE, li->username); | |
1493 | break; | |
1494 | default: | |
a233586b | 1495 | logit("%s: %.100s is not a file or directory!", __func__, |
fa64c868 | 1496 | LASTLOG_FILE); |
1497 | return (0); | |
a05a70ab | 1498 | } |
1d7b9b20 | 1499 | |
ee476051 | 1500 | *fd = open(lastlog_file, filemode, 0600); |
fa64c868 | 1501 | if (*fd < 0) { |
a233586b | 1502 | debug("%s: Couldn't open %s: %s", __func__, |
1d7b9b20 | 1503 | lastlog_file, strerror(errno)); |
fa64c868 | 1504 | return (0); |
1d7b9b20 | 1505 | } |
2b87da3b | 1506 | |
d93a7e5a | 1507 | if (type == LL_FILE) { |
1508 | /* find this uid's offset in the lastlog file */ | |
d9d47a26 | 1509 | offset = (off_t) ((long)li->uid * sizeof(struct lastlog)); |
1d7b9b20 | 1510 | |
fa64c868 | 1511 | if (lseek(*fd, offset, SEEK_SET) != offset) { |
a233586b | 1512 | logit("%s: %s->lseek(): %s", __func__, |
1513 | lastlog_file, strerror(errno)); | |
fa64c868 | 1514 | return (0); |
d93a7e5a | 1515 | } |
1d7b9b20 | 1516 | } |
2b87da3b | 1517 | |
fa64c868 | 1518 | return (1); |
564dd50a | 1519 | } |
1d7b9b20 | 1520 | |
1521 | static int | |
564dd50a | 1522 | lastlog_perform_login(struct logininfo *li) |
1523 | { | |
1d7b9b20 | 1524 | struct lastlog last; |
1525 | int fd; | |
1526 | ||
1527 | /* create our struct lastlog */ | |
1528 | lastlog_construct(li, &last); | |
1529 | ||
ee476051 | 1530 | if (!lastlog_openseek(li, &fd, O_RDWR|O_CREAT)) |
fa64c868 | 1531 | return (0); |
2b87da3b | 1532 | |
1d7b9b20 | 1533 | /* write the entry */ |
d72f7b79 | 1534 | if (atomicio(vwrite, fd, &last, sizeof(last)) != sizeof(last)) { |
1a022229 | 1535 | close(fd); |
a233586b | 1536 | logit("%s: Error writing to %s: %s", __func__, |
1a022229 | 1537 | LASTLOG_FILE, strerror(errno)); |
fa64c868 | 1538 | return (0); |
a05a70ab | 1539 | } |
1a022229 | 1540 | |
1541 | close(fd); | |
fa64c868 | 1542 | return (1); |
564dd50a | 1543 | } |
1d7b9b20 | 1544 | |
1d7b9b20 | 1545 | int |
564dd50a | 1546 | lastlog_write_entry(struct logininfo *li) |
1547 | { | |
1d7b9b20 | 1548 | switch(li->type) { |
1549 | case LTYPE_LOGIN: | |
fa64c868 | 1550 | return (lastlog_perform_login(li)); |
1d7b9b20 | 1551 | default: |
a233586b | 1552 | logit("%s: Invalid type field", __func__); |
fa64c868 | 1553 | return (0); |
1d7b9b20 | 1554 | } |
564dd50a | 1555 | } |
1d7b9b20 | 1556 | |
1d7b9b20 | 1557 | static void |
564dd50a | 1558 | lastlog_populate_entry(struct logininfo *li, struct lastlog *last) |
1559 | { | |
1d7b9b20 | 1560 | line_fullname(li->line, last->ll_line, sizeof(li->line)); |
2b87da3b | 1561 | strlcpy(li->hostname, last->ll_host, |
fa64c868 | 1562 | MIN_SIZEOF(li->hostname, last->ll_host)); |
1d7b9b20 | 1563 | li->tv_sec = last->ll_time; |
564dd50a | 1564 | } |
1d7b9b20 | 1565 | |
1d7b9b20 | 1566 | int |
564dd50a | 1567 | lastlog_get_entry(struct logininfo *li) |
1568 | { | |
1d7b9b20 | 1569 | struct lastlog last; |
ed05a983 | 1570 | int fd, ret; |
1d7b9b20 | 1571 | |
ce49121d | 1572 | if (!lastlog_openseek(li, &fd, O_RDONLY)) |
ed05a983 | 1573 | return (0); |
ce49121d | 1574 | |
ed05a983 | 1575 | ret = atomicio(read, fd, &last, sizeof(last)); |
ce49121d | 1576 | close(fd); |
1577 | ||
ed05a983 | 1578 | switch (ret) { |
1579 | case 0: | |
1580 | memset(&last, '\0', sizeof(last)); | |
1581 | /* FALLTHRU */ | |
1582 | case sizeof(last): | |
1583 | lastlog_populate_entry(li, &last); | |
1584 | return (1); | |
1585 | case -1: | |
aff51935 | 1586 | error("%s: Error reading from %s: %s", __func__, |
ed05a983 | 1587 | LASTLOG_FILE, strerror(errno)); |
1588 | return (0); | |
1589 | default: | |
1590 | error("%s: Error reading from %s: Expecting %d, got %d", | |
1591 | __func__, LASTLOG_FILE, sizeof(last), ret); | |
1592 | return (0); | |
1593 | } | |
ce49121d | 1594 | |
ed05a983 | 1595 | /* NOTREACHED */ |
1596 | return (0); | |
564dd50a | 1597 | } |
f988dce5 | 1598 | #endif /* USE_LASTLOG */ |
b6610e8f | 1599 | |
1600 | #ifdef USE_BTMP | |
1601 | /* | |
1602 | * Logs failed login attempts in _PATH_BTMP if that exists. | |
1603 | * The most common login failure is to give password instead of username. | |
1604 | * So the _PATH_BTMP file checked for the correct permission, so that | |
1605 | * only root can read it. | |
1606 | */ | |
1607 | ||
1608 | void | |
1609 | record_failed_login(const char *username, const char *hostname, | |
1610 | const char *ttyn) | |
1611 | { | |
1612 | int fd; | |
1613 | struct utmp ut; | |
1614 | struct sockaddr_storage from; | |
1615 | size_t fromlen = sizeof(from); | |
1616 | struct sockaddr_in *a4; | |
1617 | struct sockaddr_in6 *a6; | |
1618 | time_t t; | |
1619 | struct stat fst; | |
1620 | ||
1621 | if (geteuid() != 0) | |
1622 | return; | |
1623 | if ((fd = open(_PATH_BTMP, O_WRONLY | O_APPEND)) < 0) { | |
1624 | debug("Unable to open the btmp file %s: %s", _PATH_BTMP, | |
1625 | strerror(errno)); | |
1626 | return; | |
1627 | } | |
1628 | if (fstat(fd, &fst) < 0) { | |
1629 | logit("%s: fstat of %s failed: %s", __func__, _PATH_BTMP, | |
1630 | strerror(errno)); | |
1631 | goto out; | |
1632 | } | |
1633 | if((fst.st_mode & (S_IRWXG | S_IRWXO)) || (fst.st_uid != 0)){ | |
1634 | logit("Excess permission or bad ownership on file %s", | |
1635 | _PATH_BTMP); | |
1636 | goto out; | |
1637 | } | |
1638 | ||
1639 | memset(&ut, 0, sizeof(ut)); | |
1640 | /* strncpy because we don't necessarily want nul termination */ | |
1641 | strncpy(ut.ut_user, username, sizeof(ut.ut_user)); | |
1642 | strlcpy(ut.ut_line, "ssh:notty", sizeof(ut.ut_line)); | |
1643 | ||
1644 | time(&t); | |
1645 | ut.ut_time = t; /* ut_time is not always a time_t */ | |
1646 | ut.ut_type = LOGIN_PROCESS; | |
1647 | ut.ut_pid = getpid(); | |
1648 | ||
1649 | /* strncpy because we don't necessarily want nul termination */ | |
1650 | strncpy(ut.ut_host, hostname, sizeof(ut.ut_host)); | |
1651 | ||
1652 | if (packet_connection_is_on_socket() && | |
1653 | getpeername(packet_get_connection_in(), | |
1654 | (struct sockaddr *)&from, &fromlen) == 0) { | |
1655 | ipv64_normalise_mapped(&from, &fromlen); | |
1656 | if (from.ss_family == AF_INET) { | |
1657 | a4 = (struct sockaddr_in *)&from; | |
1658 | memcpy(&ut.ut_addr, &(a4->sin_addr), | |
1659 | MIN_SIZEOF(ut.ut_addr, a4->sin_addr)); | |
1660 | } | |
1661 | #ifdef HAVE_ADDR_V6_IN_UTMP | |
1662 | if (from.ss_family == AF_INET6) { | |
1663 | a6 = (struct sockaddr_in6 *)&from; | |
1664 | memcpy(&ut.ut_addr_v6, &(a6->sin6_addr), | |
1665 | MIN_SIZEOF(ut.ut_addr_v6, a6->sin6_addr)); | |
1666 | } | |
1667 | #endif | |
1668 | } | |
1669 | ||
1670 | if (atomicio(vwrite, fd, &ut, sizeof(ut)) != sizeof(ut)) | |
1671 | error("Failed to write to %s: %s", _PATH_BTMP, | |
1672 | strerror(errno)); | |
1673 | ||
1674 | out: | |
1675 | close(fd); | |
1676 | } | |
1677 | #endif /* USE_BTMP */ |