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