]>
Commit | Line | Data |
---|---|---|
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 | ||
81e73e57 | 150 | #include <sys/types.h> |
151 | #include <sys/stat.h> | |
9794d008 | 152 | #include <sys/socket.h> |
153 | ||
154 | #include <netinet/in.h> | |
81e73e57 | 155 | |
fec71b2f | 156 | #include <errno.h> |
22bbb3e6 | 157 | #include <fcntl.h> |
b1842393 | 158 | #include <pwd.h> |
159 | ||
1d7b9b20 | 160 | #include "ssh.h" |
161 | #include "xmalloc.h" | |
162 | #include "loginrec.h" | |
42f11eb2 | 163 | #include "log.h" |
164 | #include "atomicio.h" | |
b6610e8f | 165 | #include "packet.h" |
166 | #include "canohost.h" | |
c00e4d75 | 167 | #include "auth.h" |
c53d8c93 | 168 | #include "buffer.h" |
1d7b9b20 | 169 | |
44d5f7f7 | 170 | #ifdef HAVE_UTIL_H |
fa64c868 | 171 | # include <util.h> |
44d5f7f7 | 172 | #endif |
173 | ||
8f523d67 | 174 | #ifdef HAVE_LIBUTIL_H |
fa64c868 | 175 | # include <libutil.h> |
8f523d67 | 176 | #endif |
177 | ||
1d7b9b20 | 178 | /** |
179 | ** prototypes for helper functions in this file | |
180 | **/ | |
181 | ||
182 | #if HAVE_UTMP_H | |
1d7b9b20 | 183 | void set_utmp_time(struct logininfo *li, struct utmp *ut); |
184 | void construct_utmp(struct logininfo *li, struct utmp *ut); | |
185 | #endif | |
186 | ||
187 | #ifdef HAVE_UTMPX_H | |
1d7b9b20 | 188 | void set_utmpx_time(struct logininfo *li, struct utmpx *ut); |
189 | void construct_utmpx(struct logininfo *li, struct utmpx *ut); | |
190 | #endif | |
191 | ||
192 | int utmp_write_entry(struct logininfo *li); | |
193 | int utmpx_write_entry(struct logininfo *li); | |
194 | int wtmp_write_entry(struct logininfo *li); | |
195 | int wtmpx_write_entry(struct logininfo *li); | |
196 | int lastlog_write_entry(struct logininfo *li); | |
197 | int syslogin_write_entry(struct logininfo *li); | |
198 | ||
199 | int getlast_entry(struct logininfo *li); | |
200 | int lastlog_get_entry(struct logininfo *li); | |
201 | int wtmp_get_entry(struct logininfo *li); | |
202 | int wtmpx_get_entry(struct logininfo *li); | |
203 | ||
5ccf88cb | 204 | extern Buffer loginmsg; |
205 | ||
5abcdf8e | 206 | /* pick the shortest string */ |
fa64c868 | 207 | #define MIN_SIZEOF(s1,s2) (sizeof(s1) < sizeof(s2) ? sizeof(s1) : sizeof(s2)) |
5abcdf8e | 208 | |
1d7b9b20 | 209 | /** |
210 | ** platform-independent login functions | |
211 | **/ | |
212 | ||
fa64c868 | 213 | /* |
214 | * login_login(struct logininfo *) - Record a login | |
2b87da3b | 215 | * |
5abcdf8e | 216 | * Call with a pointer to a struct logininfo initialised with |
217 | * login_init_entry() or login_alloc_entry() | |
218 | * | |
219 | * Returns: | |
220 | * >0 if successful | |
221 | * 0 on failure (will use OpenSSH's logging facilities for diagnostics) | |
222 | */ | |
564dd50a | 223 | int |
fa64c868 | 224 | login_login(struct logininfo *li) |
564dd50a | 225 | { |
226 | li->type = LTYPE_LOGIN; | |
fa64c868 | 227 | return (login_write(li)); |
564dd50a | 228 | } |
1d7b9b20 | 229 | |
230 | ||
fa64c868 | 231 | /* |
232 | * login_logout(struct logininfo *) - Record a logout | |
5abcdf8e | 233 | * |
234 | * Call as with login_login() | |
235 | * | |
236 | * Returns: | |
237 | * >0 if successful | |
238 | * 0 on failure (will use OpenSSH's logging facilities for diagnostics) | |
239 | */ | |
564dd50a | 240 | int |
241 | login_logout(struct logininfo *li) | |
242 | { | |
243 | li->type = LTYPE_LOGOUT; | |
fa64c868 | 244 | return (login_write(li)); |
1d7b9b20 | 245 | } |
246 | ||
fa64c868 | 247 | /* |
248 | * login_get_lastlog_time(int) - Retrieve the last login time | |
5abcdf8e | 249 | * |
250 | * Retrieve the last login time for the given uid. Will try to use the | |
251 | * system lastlog facilities if they are available, but will fall back | |
252 | * to looking in wtmp/wtmpx if necessary | |
253 | * | |
254 | * Returns: | |
255 | * 0 on failure, or if user has never logged in | |
256 | * Time in seconds from the epoch if successful | |
257 | * | |
258 | * Useful preprocessor symbols: | |
259 | * DISABLE_LASTLOG: If set, *never* even try to retrieve lastlog | |
260 | * info | |
261 | * USE_LASTLOG: If set, indicates the presence of system lastlog | |
262 | * facilities. If this and DISABLE_LASTLOG are not set, | |
263 | * try to retrieve lastlog information from wtmp/wtmpx. | |
264 | */ | |
564dd50a | 265 | unsigned int |
266 | login_get_lastlog_time(const int uid) | |
267 | { | |
268 | struct logininfo li; | |
1d7b9b20 | 269 | |
5abcdf8e | 270 | if (login_get_lastlog(&li, uid)) |
fa64c868 | 271 | return (li.tv_sec); |
5abcdf8e | 272 | else |
fa64c868 | 273 | return (0); |
564dd50a | 274 | } |
1d7b9b20 | 275 | |
fa64c868 | 276 | /* |
277 | * login_get_lastlog(struct logininfo *, int) - Retrieve a lastlog entry | |
5abcdf8e | 278 | * |
279 | * Retrieve a logininfo structure populated (only partially) with | |
280 | * information from the system lastlog data, or from wtmp/wtmpx if no | |
281 | * system lastlog information exists. | |
282 | * | |
283 | * Note this routine must be given a pre-allocated logininfo. | |
284 | * | |
285 | * Returns: | |
286 | * >0: A pointer to your struct logininfo if successful | |
287 | * 0 on failure (will use OpenSSH's logging facilities for diagnostics) | |
5abcdf8e | 288 | */ |
564dd50a | 289 | struct logininfo * |
290 | login_get_lastlog(struct logininfo *li, const int uid) | |
291 | { | |
5abcdf8e | 292 | struct passwd *pw; |
5abcdf8e | 293 | |
dbaa2e87 | 294 | memset(li, '\0', sizeof(*li)); |
1d7b9b20 | 295 | li->uid = uid; |
5abcdf8e | 296 | |
2b87da3b | 297 | /* |
9f32ceb4 | 298 | * If we don't have a 'real' lastlog, we need the username to |
5abcdf8e | 299 | * reliably search wtmp(x) for the last login (see |
2b87da3b | 300 | * wtmp_get_entry().) |
9f32ceb4 | 301 | */ |
5abcdf8e | 302 | pw = getpwuid(uid); |
a05a70ab | 303 | if (pw == NULL) |
a233586b | 304 | fatal("%s: Cannot find account for uid %i", __func__, uid); |
2b87da3b | 305 | |
1bfbb762 | 306 | /* No MIN_SIZEOF here - we absolutely *must not* truncate the |
fa64c868 | 307 | * username (XXX - so check for trunc!) */ |
d8caae24 | 308 | strlcpy(li->username, pw->pw_name, sizeof(li->username)); |
a05a70ab | 309 | |
564dd50a | 310 | if (getlast_entry(li)) |
fa64c868 | 311 | return (li); |
564dd50a | 312 | else |
fa64c868 | 313 | return (NULL); |
1d7b9b20 | 314 | } |
315 | ||
1d7b9b20 | 316 | |
fa64c868 | 317 | /* |
318 | * login_alloc_entry(int, char*, char*, char*) - Allocate and initialise | |
2b87da3b | 319 | * a logininfo structure |
320 | * | |
5abcdf8e | 321 | * This function creates a new struct logininfo, a data structure |
322 | * meant to carry the information required to portably record login info. | |
323 | * | |
324 | * Returns a pointer to a newly created struct logininfo. If memory | |
325 | * allocation fails, the program halts. | |
326 | */ | |
564dd50a | 327 | struct |
328 | logininfo *login_alloc_entry(int pid, const char *username, | |
fa64c868 | 329 | const char *hostname, const char *line) |
564dd50a | 330 | { |
331 | struct logininfo *newli; | |
1d7b9b20 | 332 | |
fa64c868 | 333 | newli = xmalloc(sizeof(*newli)); |
334 | login_init_entry(newli, pid, username, hostname, line); | |
335 | return (newli); | |
1d7b9b20 | 336 | } |
337 | ||
338 | ||
5abcdf8e | 339 | /* login_free_entry(struct logininfo *) - free struct memory */ |
1d7b9b20 | 340 | void |
564dd50a | 341 | login_free_entry(struct logininfo *li) |
342 | { | |
343 | xfree(li); | |
1d7b9b20 | 344 | } |
345 | ||
346 | ||
5abcdf8e | 347 | /* login_init_entry(struct logininfo *, int, char*, char*, char*) |
348 | * - initialise a struct logininfo | |
2b87da3b | 349 | * |
5abcdf8e | 350 | * Populates a new struct logininfo, a data structure meant to carry |
351 | * the information required to portably record login info. | |
352 | * | |
353 | * Returns: 1 | |
354 | */ | |
564dd50a | 355 | int |
2b87da3b | 356 | login_init_entry(struct logininfo *li, int pid, const char *username, |
fa64c868 | 357 | const char *hostname, const char *line) |
564dd50a | 358 | { |
d8caae24 | 359 | struct passwd *pw; |
2b87da3b | 360 | |
dbaa2e87 | 361 | memset(li, 0, sizeof(*li)); |
2b87da3b | 362 | |
564dd50a | 363 | li->pid = pid; |
d8caae24 | 364 | |
564dd50a | 365 | /* set the line information */ |
366 | if (line) | |
367 | line_fullname(li->line, line, sizeof(li->line)); | |
1d7b9b20 | 368 | |
d8caae24 | 369 | if (username) { |
564dd50a | 370 | strlcpy(li->username, username, sizeof(li->username)); |
d8caae24 | 371 | pw = getpwnam(li->username); |
fa64c868 | 372 | if (pw == NULL) { |
d1cf9a87 | 373 | fatal("%s: Cannot find user \"%s\"", __func__, |
fa64c868 | 374 | li->username); |
375 | } | |
d8caae24 | 376 | li->uid = pw->pw_uid; |
377 | } | |
a05a70ab | 378 | |
564dd50a | 379 | if (hostname) |
380 | strlcpy(li->hostname, hostname, sizeof(li->hostname)); | |
d8caae24 | 381 | |
fa64c868 | 382 | return (1); |
1d7b9b20 | 383 | } |
384 | ||
d1cf9a87 | 385 | /* |
fa64c868 | 386 | * login_set_current_time(struct logininfo *) - set the current time |
5abcdf8e | 387 | * |
388 | * Set the current time in a logininfo structure. This function is | |
389 | * meant to eliminate the need to deal with system dependencies for | |
390 | * time handling. | |
391 | */ | |
1d7b9b20 | 392 | void |
564dd50a | 393 | login_set_current_time(struct logininfo *li) |
394 | { | |
1d7b9b20 | 395 | struct timeval tv; |
396 | ||
397 | gettimeofday(&tv, NULL); | |
2b87da3b | 398 | |
d8caae24 | 399 | li->tv_sec = tv.tv_sec; |
400 | li->tv_usec = tv.tv_usec; | |
1d7b9b20 | 401 | } |
402 | ||
564dd50a | 403 | /* copy a sockaddr_* into our logininfo */ |
1d7b9b20 | 404 | void |
564dd50a | 405 | login_set_addr(struct logininfo *li, const struct sockaddr *sa, |
fa64c868 | 406 | const unsigned int sa_size) |
564dd50a | 407 | { |
408 | unsigned int bufsize = sa_size; | |
409 | ||
410 | /* make sure we don't overrun our union */ | |
411 | if (sizeof(li->hostaddr) < sa_size) | |
412 | bufsize = sizeof(li->hostaddr); | |
413 | ||
fa64c868 | 414 | memcpy(&li->hostaddr.sa, sa, bufsize); |
1d7b9b20 | 415 | } |
1d7b9b20 | 416 | |
564dd50a | 417 | |
418 | /** | |
419 | ** login_write: Call low-level recording functions based on autoconf | |
420 | ** results | |
421 | **/ | |
1d7b9b20 | 422 | int |
fa64c868 | 423 | login_write(struct logininfo *li) |
564dd50a | 424 | { |
3c62e7eb | 425 | #ifndef HAVE_CYGWIN |
fa64c868 | 426 | if (geteuid() != 0) { |
427 | logit("Attempt to write login records by non-root user (aborting)"); | |
428 | return (1); | |
1d7b9b20 | 429 | } |
3c62e7eb | 430 | #endif |
a05a70ab | 431 | |
1d7b9b20 | 432 | /* set the timestamp */ |
433 | login_set_current_time(li); | |
434 | #ifdef USE_LOGIN | |
435 | syslogin_write_entry(li); | |
436 | #endif | |
437 | #ifdef USE_LASTLOG | |
fa64c868 | 438 | if (li->type == LTYPE_LOGIN) |
1d7b9b20 | 439 | lastlog_write_entry(li); |
1d7b9b20 | 440 | #endif |
441 | #ifdef USE_UTMP | |
442 | utmp_write_entry(li); | |
443 | #endif | |
444 | #ifdef USE_WTMP | |
445 | wtmp_write_entry(li); | |
446 | #endif | |
447 | #ifdef USE_UTMPX | |
448 | utmpx_write_entry(li); | |
449 | #endif | |
450 | #ifdef USE_WTMPX | |
451 | wtmpx_write_entry(li); | |
f5ed3301 | 452 | #endif |
453 | #ifdef CUSTOM_SYS_AUTH_RECORD_LOGIN | |
d1cf9a87 | 454 | if (li->type == LTYPE_LOGIN && |
98c044d0 | 455 | !sys_auth_record_login(li->username,li->hostname,li->line, |
456 | &loginmsg)) | |
f5ed3301 | 457 | logit("Writing login record failed for %s", li->username); |
c00e4d75 | 458 | #endif |
6039eeef | 459 | #ifdef SSH_AUDIT_EVENTS |
c00e4d75 | 460 | if (li->type == LTYPE_LOGIN) |
461 | audit_session_open(li->line); | |
462 | else if (li->type == LTYPE_LOGOUT) | |
463 | audit_session_close(li->line); | |
1d7b9b20 | 464 | #endif |
fa64c868 | 465 | return (0); |
1d7b9b20 | 466 | } |
467 | ||
7e2d5fa4 | 468 | #ifdef LOGIN_NEEDS_UTMPX |
469 | int | |
470 | login_utmp_only(struct logininfo *li) | |
471 | { | |
aff51935 | 472 | li->type = LTYPE_LOGIN; |
9e127e27 | 473 | login_set_current_time(li); |
7e2d5fa4 | 474 | # ifdef USE_UTMP |
475 | utmp_write_entry(li); | |
476 | # endif | |
477 | # ifdef USE_WTMP | |
478 | wtmp_write_entry(li); | |
479 | # endif | |
480 | # ifdef USE_UTMPX | |
481 | utmpx_write_entry(li); | |
482 | # endif | |
483 | # ifdef USE_WTMPX | |
484 | wtmpx_write_entry(li); | |
485 | # endif | |
fa64c868 | 486 | return (0); |
7e2d5fa4 | 487 | } |
488 | #endif | |
489 | ||
564dd50a | 490 | /** |
491 | ** getlast_entry: Call low-level functions to retrieve the last login | |
492 | ** time. | |
493 | **/ | |
1d7b9b20 | 494 | |
564dd50a | 495 | /* take the uid in li and return the last login time */ |
1d7b9b20 | 496 | int |
564dd50a | 497 | getlast_entry(struct logininfo *li) |
498 | { | |
499 | #ifdef USE_LASTLOG | |
9f32ceb4 | 500 | return(lastlog_get_entry(li)); |
a05a70ab | 501 | #else /* !USE_LASTLOG */ |
1d7b9b20 | 502 | |
fa64c868 | 503 | #if defined(DISABLE_LASTLOG) |
2b87da3b | 504 | /* On some systems we shouldn't even try to obtain last login |
3f45f1c3 | 505 | * time, e.g. AIX */ |
fa64c868 | 506 | return (0); |
507 | # elif defined(USE_WTMP) && \ | |
508 | (defined(HAVE_TIME_IN_UTMP) || defined(HAVE_TV_IN_UTMP)) | |
564dd50a | 509 | /* retrieve last login time from utmp */ |
a05a70ab | 510 | return (wtmp_get_entry(li)); |
fa64c868 | 511 | # elif defined(USE_WTMPX) && \ |
512 | (defined(HAVE_TIME_IN_UTMPX) || defined(HAVE_TV_IN_UTMPX)) | |
564dd50a | 513 | /* If wtmp isn't available, try wtmpx */ |
a05a70ab | 514 | return (wtmpx_get_entry(li)); |
fa64c868 | 515 | # else |
564dd50a | 516 | /* Give up: No means of retrieving last login time */ |
fa64c868 | 517 | return (0); |
2b87da3b | 518 | # endif /* DISABLE_LASTLOG */ |
a05a70ab | 519 | #endif /* USE_LASTLOG */ |
564dd50a | 520 | } |
1d7b9b20 | 521 | |
522 | ||
1d7b9b20 | 523 | |
524 | /* | |
564dd50a | 525 | * 'line' string utility functions |
526 | * | |
527 | * These functions process the 'line' string into one of three forms: | |
528 | * | |
1d7b9b20 | 529 | * 1. The full filename (including '/dev') |
530 | * 2. The stripped name (excluding '/dev') | |
564dd50a | 531 | * 3. The abbreviated name (e.g. /dev/ttyp00 -> yp00 |
532 | * /dev/pts/1 -> ts/1 ) | |
1d7b9b20 | 533 | * |
534 | * Form 3 is used on some systems to identify a .tmp.? entry when | |
535 | * attempting to remove it. Typically both addition and removal is | |
564dd50a | 536 | * performed by one application - say, sshd - so as long as the choice |
537 | * uniquely identifies a terminal it's ok. | |
1d7b9b20 | 538 | */ |
539 | ||
540 | ||
fa64c868 | 541 | /* |
542 | * line_fullname(): add the leading '/dev/' if it doesn't exist make | |
543 | * sure dst has enough space, if not just copy src (ugh) | |
544 | */ | |
1d7b9b20 | 545 | char * |
44d71ad5 | 546 | line_fullname(char *dst, const char *src, u_int dstsize) |
564dd50a | 547 | { |
1d7b9b20 | 548 | memset(dst, '\0', dstsize); |
fa64c868 | 549 | if ((strncmp(src, "/dev/", 5) == 0) || (dstsize < (strlen(src) + 5))) |
1d7b9b20 | 550 | strlcpy(dst, src, dstsize); |
fa64c868 | 551 | else { |
a4d05724 | 552 | strlcpy(dst, "/dev/", dstsize); |
1d7b9b20 | 553 | strlcat(dst, src, dstsize); |
554 | } | |
fa64c868 | 555 | return (dst); |
1d7b9b20 | 556 | } |
557 | ||
564dd50a | 558 | /* line_stripname(): strip the leading '/dev' if it exists, return dst */ |
1d7b9b20 | 559 | char * |
564dd50a | 560 | line_stripname(char *dst, const char *src, int dstsize) |
561 | { | |
1d7b9b20 | 562 | memset(dst, '\0', dstsize); |
563 | if (strncmp(src, "/dev/", 5) == 0) | |
89d7510a | 564 | strlcpy(dst, src + 5, dstsize); |
1d7b9b20 | 565 | else |
566 | strlcpy(dst, src, dstsize); | |
fa64c868 | 567 | return (dst); |
564dd50a | 568 | } |
569 | ||
d1cf9a87 | 570 | /* |
fa64c868 | 571 | * line_abbrevname(): Return the abbreviated (usually four-character) |
564dd50a | 572 | * form of the line (Just use the last <dstsize> characters of the |
573 | * full name.) | |
574 | * | |
575 | * NOTE: use strncpy because we do NOT necessarily want zero | |
fa64c868 | 576 | * termination |
577 | */ | |
1d7b9b20 | 578 | char * |
2b87da3b | 579 | line_abbrevname(char *dst, const char *src, int dstsize) |
a05a70ab | 580 | { |
581 | size_t len; | |
2b87da3b | 582 | |
1d7b9b20 | 583 | memset(dst, '\0', dstsize); |
2b87da3b | 584 | |
daaff4d5 | 585 | /* Always skip prefix if present */ |
586 | if (strncmp(src, "/dev/", 5) == 0) | |
587 | src += 5; | |
2b87da3b | 588 | |
0e8f4eba | 589 | #ifdef WITH_ABBREV_NO_TTY |
590 | if (strncmp(src, "tty", 3) == 0) | |
591 | src += 3; | |
592 | #endif | |
593 | ||
a05a70ab | 594 | len = strlen(src); |
595 | ||
daaff4d5 | 596 | if (len > 0) { |
597 | if (((int)len - dstsize) > 0) | |
598 | src += ((int)len - dstsize); | |
599 | ||
600 | /* note: _don't_ change this to strlcpy */ | |
2b87da3b | 601 | strncpy(dst, src, (size_t)dstsize); |
a05a70ab | 602 | } |
2b87da3b | 603 | |
fa64c868 | 604 | return (dst); |
1d7b9b20 | 605 | } |
606 | ||
1d7b9b20 | 607 | /** |
608 | ** utmp utility functions | |
564dd50a | 609 | ** |
610 | ** These functions manipulate struct utmp, taking system differences | |
611 | ** into account. | |
1d7b9b20 | 612 | **/ |
613 | ||
614 | #if defined(USE_UTMP) || defined (USE_WTMP) || defined (USE_LOGIN) | |
615 | ||
1d7b9b20 | 616 | /* build the utmp structure */ |
617 | void | |
564dd50a | 618 | set_utmp_time(struct logininfo *li, struct utmp *ut) |
619 | { | |
fa64c868 | 620 | # if defined(HAVE_TV_IN_UTMP) |
1d7b9b20 | 621 | ut->ut_tv.tv_sec = li->tv_sec; |
622 | ut->ut_tv.tv_usec = li->tv_usec; | |
fa64c868 | 623 | # elif defined(HAVE_TIME_IN_UTMP) |
1d7b9b20 | 624 | ut->ut_time = li->tv_sec; |
a05a70ab | 625 | # endif |
1d7b9b20 | 626 | } |
627 | ||
628 | void | |
629 | construct_utmp(struct logininfo *li, | |
564dd50a | 630 | struct utmp *ut) |
631 | { | |
9746ee4b | 632 | # ifdef HAVE_ADDR_V6_IN_UTMP |
633 | struct sockaddr_in6 *sa6; | |
fa64c868 | 634 | # endif |
635 | ||
dbaa2e87 | 636 | memset(ut, '\0', sizeof(*ut)); |
5abcdf8e | 637 | |
638 | /* First fill out fields used for both logins and logouts */ | |
639 | ||
a05a70ab | 640 | # ifdef HAVE_ID_IN_UTMP |
1d7b9b20 | 641 | line_abbrevname(ut->ut_id, li->line, sizeof(ut->ut_id)); |
a05a70ab | 642 | # endif |
1d7b9b20 | 643 | |
a05a70ab | 644 | # ifdef HAVE_TYPE_IN_UTMP |
5abcdf8e | 645 | /* This is done here to keep utmp constants out of struct logininfo */ |
1d7b9b20 | 646 | switch (li->type) { |
647 | case LTYPE_LOGIN: | |
648 | ut->ut_type = USER_PROCESS; | |
ef51930f | 649 | #ifdef _UNICOS |
1a23ac2c | 650 | cray_set_tmpdir(ut); |
651 | #endif | |
1d7b9b20 | 652 | break; |
653 | case LTYPE_LOGOUT: | |
654 | ut->ut_type = DEAD_PROCESS; | |
ef51930f | 655 | #ifdef _UNICOS |
1a23ac2c | 656 | cray_retain_utmp(ut, li->pid); |
657 | #endif | |
1d7b9b20 | 658 | break; |
659 | } | |
a05a70ab | 660 | # endif |
5abcdf8e | 661 | set_utmp_time(li, ut); |
1d7b9b20 | 662 | |
5abcdf8e | 663 | line_stripname(ut->ut_line, li->line, sizeof(ut->ut_line)); |
a05a70ab | 664 | |
665 | # ifdef HAVE_PID_IN_UTMP | |
1d7b9b20 | 666 | ut->ut_pid = li->pid; |
a05a70ab | 667 | # endif |
5abcdf8e | 668 | |
669 | /* If we're logging out, leave all other fields blank */ | |
670 | if (li->type == LTYPE_LOGOUT) | |
fa64c868 | 671 | return; |
5abcdf8e | 672 | |
a05a70ab | 673 | /* |
674 | * These fields are only used when logging in, and are blank | |
2b87da3b | 675 | * for logouts. |
a05a70ab | 676 | */ |
5abcdf8e | 677 | |
678 | /* Use strncpy because we don't necessarily want null termination */ | |
fa64c868 | 679 | strncpy(ut->ut_name, li->username, |
680 | MIN_SIZEOF(ut->ut_name, li->username)); | |
a05a70ab | 681 | # ifdef HAVE_HOST_IN_UTMP |
fa64c868 | 682 | strncpy(ut->ut_host, li->hostname, |
683 | MIN_SIZEOF(ut->ut_host, li->hostname)); | |
a05a70ab | 684 | # endif |
685 | # ifdef HAVE_ADDR_IN_UTMP | |
564dd50a | 686 | /* this is just a 32-bit IP address */ |
687 | if (li->hostaddr.sa.sa_family == AF_INET) | |
688 | ut->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr; | |
2b87da3b | 689 | # endif |
9746ee4b | 690 | # ifdef HAVE_ADDR_V6_IN_UTMP |
691 | /* this is just a 128-bit IPv6 address */ | |
692 | if (li->hostaddr.sa.sa_family == AF_INET6) { | |
693 | sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa); | |
694 | memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16); | |
695 | if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) { | |
696 | ut->ut_addr_v6[0] = ut->ut_addr_v6[3]; | |
697 | ut->ut_addr_v6[1] = 0; | |
698 | ut->ut_addr_v6[2] = 0; | |
699 | ut->ut_addr_v6[3] = 0; | |
700 | } | |
701 | } | |
702 | # endif | |
564dd50a | 703 | } |
a05a70ab | 704 | #endif /* USE_UTMP || USE_WTMP || USE_LOGIN */ |
564dd50a | 705 | |
1d7b9b20 | 706 | /** |
707 | ** utmpx utility functions | |
564dd50a | 708 | ** |
709 | ** These functions manipulate struct utmpx, accounting for system | |
710 | ** variations. | |
1d7b9b20 | 711 | **/ |
712 | ||
713 | #if defined(USE_UTMPX) || defined (USE_WTMPX) | |
1d7b9b20 | 714 | /* build the utmpx structure */ |
715 | void | |
564dd50a | 716 | set_utmpx_time(struct logininfo *li, struct utmpx *utx) |
717 | { | |
fa64c868 | 718 | # if defined(HAVE_TV_IN_UTMPX) |
1d7b9b20 | 719 | utx->ut_tv.tv_sec = li->tv_sec; |
720 | utx->ut_tv.tv_usec = li->tv_usec; | |
fa64c868 | 721 | # elif defined(HAVE_TIME_IN_UTMPX) |
1d7b9b20 | 722 | utx->ut_time = li->tv_sec; |
fa64c868 | 723 | # endif |
1d7b9b20 | 724 | } |
725 | ||
726 | void | |
564dd50a | 727 | construct_utmpx(struct logininfo *li, struct utmpx *utx) |
728 | { | |
9746ee4b | 729 | # ifdef HAVE_ADDR_V6_IN_UTMP |
730 | struct sockaddr_in6 *sa6; | |
731 | # endif | |
dbaa2e87 | 732 | memset(utx, '\0', sizeof(*utx)); |
fa64c868 | 733 | |
daaff4d5 | 734 | # ifdef HAVE_ID_IN_UTMPX |
1d7b9b20 | 735 | line_abbrevname(utx->ut_id, li->line, sizeof(utx->ut_id)); |
daaff4d5 | 736 | # endif |
1d7b9b20 | 737 | |
738 | /* this is done here to keep utmp constants out of loginrec.h */ | |
739 | switch (li->type) { | |
740 | case LTYPE_LOGIN: | |
741 | utx->ut_type = USER_PROCESS; | |
742 | break; | |
743 | case LTYPE_LOGOUT: | |
744 | utx->ut_type = DEAD_PROCESS; | |
745 | break; | |
746 | } | |
1d7b9b20 | 747 | line_stripname(utx->ut_line, li->line, sizeof(utx->ut_line)); |
1d7b9b20 | 748 | set_utmpx_time(li, utx); |
5abcdf8e | 749 | utx->ut_pid = li->pid; |
fa64c868 | 750 | |
f3837bc6 | 751 | /* strncpy(): Don't necessarily want null termination */ |
fa64c868 | 752 | strncpy(utx->ut_name, li->username, |
753 | MIN_SIZEOF(utx->ut_name, li->username)); | |
5abcdf8e | 754 | |
755 | if (li->type == LTYPE_LOGOUT) | |
756 | return; | |
757 | ||
a05a70ab | 758 | /* |
759 | * These fields are only used when logging in, and are blank | |
2b87da3b | 760 | * for logouts. |
a05a70ab | 761 | */ |
5abcdf8e | 762 | |
a05a70ab | 763 | # ifdef HAVE_HOST_IN_UTMPX |
fa64c868 | 764 | strncpy(utx->ut_host, li->hostname, |
765 | MIN_SIZEOF(utx->ut_host, li->hostname)); | |
a05a70ab | 766 | # endif |
767 | # ifdef HAVE_ADDR_IN_UTMPX | |
764d4113 | 768 | /* this is just a 32-bit IP address */ |
769 | if (li->hostaddr.sa.sa_family == AF_INET) | |
770 | utx->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr; | |
a05a70ab | 771 | # endif |
9746ee4b | 772 | # ifdef HAVE_ADDR_V6_IN_UTMP |
773 | /* this is just a 128-bit IPv6 address */ | |
774 | if (li->hostaddr.sa.sa_family == AF_INET6) { | |
775 | sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa); | |
776 | memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16); | |
777 | if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) { | |
778 | ut->ut_addr_v6[0] = ut->ut_addr_v6[3]; | |
779 | ut->ut_addr_v6[1] = 0; | |
780 | ut->ut_addr_v6[2] = 0; | |
781 | ut->ut_addr_v6[3] = 0; | |
782 | } | |
783 | } | |
784 | # endif | |
a05a70ab | 785 | # ifdef HAVE_SYSLEN_IN_UTMPX |
5abcdf8e | 786 | /* ut_syslen is the length of the utx_host string */ |
787 | utx->ut_syslen = MIN(strlen(li->hostname), sizeof(utx->ut_host)); | |
a05a70ab | 788 | # endif |
564dd50a | 789 | } |
a05a70ab | 790 | #endif /* USE_UTMPX || USE_WTMPX */ |
1d7b9b20 | 791 | |
792 | /** | |
564dd50a | 793 | ** Low-level utmp functions |
1d7b9b20 | 794 | **/ |
795 | ||
796 | /* FIXME: (ATL) utmp_write_direct needs testing */ | |
1d7b9b20 | 797 | #ifdef USE_UTMP |
798 | ||
1d7b9b20 | 799 | /* if we can, use pututline() etc. */ |
a05a70ab | 800 | # if !defined(DISABLE_PUTUTLINE) && defined(HAVE_SETUTENT) && \ |
801 | defined(HAVE_PUTUTLINE) | |
1d7b9b20 | 802 | # define UTMP_USE_LIBRARY |
a05a70ab | 803 | # endif |
1d7b9b20 | 804 | |
805 | ||
806 | /* write a utmp entry with the system's help (pututline() and pals) */ | |
a05a70ab | 807 | # ifdef UTMP_USE_LIBRARY |
1d7b9b20 | 808 | static int |
564dd50a | 809 | utmp_write_library(struct logininfo *li, struct utmp *ut) |
810 | { | |
1d7b9b20 | 811 | setutent(); |
812 | pututline(ut); | |
a05a70ab | 813 | # ifdef HAVE_ENDUTENT |
1d7b9b20 | 814 | endutent(); |
a05a70ab | 815 | # endif |
fa64c868 | 816 | return (1); |
564dd50a | 817 | } |
a05a70ab | 818 | # else /* UTMP_USE_LIBRARY */ |
1d7b9b20 | 819 | |
d1cf9a87 | 820 | /* |
fa64c868 | 821 | * Write a utmp entry direct to the file |
822 | * This is a slightly modification of code in OpenBSD's login.c | |
823 | */ | |
1d7b9b20 | 824 | static int |
564dd50a | 825 | utmp_write_direct(struct logininfo *li, struct utmp *ut) |
826 | { | |
1d7b9b20 | 827 | struct utmp old_ut; |
828 | register int fd; | |
829 | int tty; | |
830 | ||
5abcdf8e | 831 | /* FIXME: (ATL) ttyslot() needs local implementation */ |
dbaa2e87 | 832 | |
698d107e | 833 | #if defined(HAVE_GETTTYENT) |
fa64c868 | 834 | struct ttyent *ty; |
dbaa2e87 | 835 | |
836 | tty=0; | |
dbaa2e87 | 837 | setttyent(); |
fa64c868 | 838 | while (NULL != (ty = getttyent())) { |
dbaa2e87 | 839 | tty++; |
840 | if (!strncmp(ty->ty_name, ut->ut_line, sizeof(ut->ut_line))) | |
841 | break; | |
842 | } | |
843 | endttyent(); | |
844 | ||
fa64c868 | 845 | if (NULL == ty) { |
5f12e050 | 846 | logit("%s: tty not found", __func__); |
847 | return (0); | |
dbaa2e87 | 848 | } |
849 | #else /* FIXME */ | |
850 | ||
1d7b9b20 | 851 | tty = ttyslot(); /* seems only to work for /dev/ttyp? style names */ |
852 | ||
698d107e | 853 | #endif /* HAVE_GETTTYENT */ |
dbaa2e87 | 854 | |
1d7b9b20 | 855 | if (tty > 0 && (fd = open(UTMP_FILE, O_RDWR|O_CREAT, 0644)) >= 0) { |
5f12e050 | 856 | off_t pos, ret; |
857 | ||
858 | pos = (off_t)tty * sizeof(struct utmp); | |
859 | if ((ret = lseek(fd, pos, SEEK_SET)) == -1) { | |
f6d20d59 | 860 | logit("%s: lseek: %s", __func__, strerror(errno)); |
5f12e050 | 861 | return (0); |
862 | } | |
863 | if (ret != pos) { | |
d1cf9a87 | 864 | logit("%s: Couldn't seek to tty %d slot in %s", |
f6d20d59 | 865 | __func__, tty, UTMP_FILE); |
5f12e050 | 866 | return (0); |
867 | } | |
1d7b9b20 | 868 | /* |
869 | * Prevent luser from zero'ing out ut_host. | |
870 | * If the new ut_line is empty but the old one is not | |
dc2a6d09 | 871 | * and ut_line and ut_name match, preserve the old ut_line. |
1d7b9b20 | 872 | */ |
2b87da3b | 873 | if (atomicio(read, fd, &old_ut, sizeof(old_ut)) == sizeof(old_ut) && |
fa64c868 | 874 | (ut->ut_host[0] == '\0') && (old_ut.ut_host[0] != '\0') && |
875 | (strncmp(old_ut.ut_line, ut->ut_line, sizeof(ut->ut_line)) == 0) && | |
876 | (strncmp(old_ut.ut_name, ut->ut_name, sizeof(ut->ut_name)) == 0)) | |
877 | memcpy(ut->ut_host, old_ut.ut_host, sizeof(ut->ut_host)); | |
2b87da3b | 878 | |
5f12e050 | 879 | if ((ret = lseek(fd, pos, SEEK_SET)) == -1) { |
f6d20d59 | 880 | logit("%s: lseek: %s", __func__, strerror(errno)); |
5f12e050 | 881 | return (0); |
882 | } | |
883 | if (ret != pos) { | |
f6d20d59 | 884 | logit("%s: Couldn't seek to tty %d slot in %s", |
5f12e050 | 885 | __func__, tty, UTMP_FILE); |
886 | return (0); | |
887 | } | |
fa64c868 | 888 | if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) { |
5f12e050 | 889 | logit("%s: error writing %s: %s", __func__, |
5abcdf8e | 890 | UTMP_FILE, strerror(errno)); |
fa64c868 | 891 | } |
2b87da3b | 892 | |
fa64c868 | 893 | close(fd); |
894 | return (1); | |
9f32ceb4 | 895 | } else { |
fa64c868 | 896 | return (0); |
9f32ceb4 | 897 | } |
564dd50a | 898 | } |
a05a70ab | 899 | # endif /* UTMP_USE_LIBRARY */ |
1d7b9b20 | 900 | |
901 | static int | |
564dd50a | 902 | utmp_perform_login(struct logininfo *li) |
903 | { | |
1d7b9b20 | 904 | struct utmp ut; |
905 | ||
906 | construct_utmp(li, &ut); | |
a05a70ab | 907 | # ifdef UTMP_USE_LIBRARY |
1d7b9b20 | 908 | if (!utmp_write_library(li, &ut)) { |
a233586b | 909 | logit("%s: utmp_write_library() failed", __func__); |
fa64c868 | 910 | return (0); |
1d7b9b20 | 911 | } |
a05a70ab | 912 | # else |
1d7b9b20 | 913 | if (!utmp_write_direct(li, &ut)) { |
a233586b | 914 | logit("%s: utmp_write_direct() failed", __func__); |
fa64c868 | 915 | return (0); |
1d7b9b20 | 916 | } |
a05a70ab | 917 | # endif |
fa64c868 | 918 | return (1); |
564dd50a | 919 | } |
1d7b9b20 | 920 | |
921 | ||
922 | static int | |
564dd50a | 923 | utmp_perform_logout(struct logininfo *li) |
924 | { | |
1d7b9b20 | 925 | struct utmp ut; |
926 | ||
5abcdf8e | 927 | construct_utmp(li, &ut); |
a05a70ab | 928 | # ifdef UTMP_USE_LIBRARY |
5abcdf8e | 929 | if (!utmp_write_library(li, &ut)) { |
a233586b | 930 | logit("%s: utmp_write_library() failed", __func__); |
fa64c868 | 931 | return (0); |
5abcdf8e | 932 | } |
a05a70ab | 933 | # else |
5abcdf8e | 934 | if (!utmp_write_direct(li, &ut)) { |
a233586b | 935 | logit("%s: utmp_write_direct() failed", __func__); |
fa64c868 | 936 | return (0); |
5abcdf8e | 937 | } |
a05a70ab | 938 | # endif |
fa64c868 | 939 | return (1); |
564dd50a | 940 | } |
1d7b9b20 | 941 | |
942 | ||
943 | int | |
564dd50a | 944 | utmp_write_entry(struct logininfo *li) |
945 | { | |
1d7b9b20 | 946 | switch(li->type) { |
947 | case LTYPE_LOGIN: | |
fa64c868 | 948 | return (utmp_perform_login(li)); |
1d7b9b20 | 949 | |
950 | case LTYPE_LOGOUT: | |
fa64c868 | 951 | return (utmp_perform_logout(li)); |
1d7b9b20 | 952 | |
953 | default: | |
a233586b | 954 | logit("%s: invalid type field", __func__); |
fa64c868 | 955 | return (0); |
1d7b9b20 | 956 | } |
564dd50a | 957 | } |
a05a70ab | 958 | #endif /* USE_UTMP */ |
1d7b9b20 | 959 | |
960 | ||
961 | /** | |
564dd50a | 962 | ** Low-level utmpx functions |
1d7b9b20 | 963 | **/ |
964 | ||
965 | /* not much point if we don't want utmpx entries */ | |
966 | #ifdef USE_UTMPX | |
967 | ||
1d7b9b20 | 968 | /* if we have the wherewithall, use pututxline etc. */ |
a05a70ab | 969 | # if !defined(DISABLE_PUTUTXLINE) && defined(HAVE_SETUTXENT) && \ |
970 | defined(HAVE_PUTUTXLINE) | |
1d7b9b20 | 971 | # define UTMPX_USE_LIBRARY |
a05a70ab | 972 | # endif |
1d7b9b20 | 973 | |
974 | ||
975 | /* write a utmpx entry with the system's help (pututxline() and pals) */ | |
a05a70ab | 976 | # ifdef UTMPX_USE_LIBRARY |
1d7b9b20 | 977 | static int |
564dd50a | 978 | utmpx_write_library(struct logininfo *li, struct utmpx *utx) |
979 | { | |
1d7b9b20 | 980 | setutxent(); |
981 | pututxline(utx); | |
982 | ||
a05a70ab | 983 | # ifdef HAVE_ENDUTXENT |
1d7b9b20 | 984 | endutxent(); |
a05a70ab | 985 | # endif |
fa64c868 | 986 | return (1); |
564dd50a | 987 | } |
1d7b9b20 | 988 | |
a05a70ab | 989 | # else /* UTMPX_USE_LIBRARY */ |
1d7b9b20 | 990 | |
991 | /* write a utmp entry direct to the file */ | |
992 | static int | |
564dd50a | 993 | utmpx_write_direct(struct logininfo *li, struct utmpx *utx) |
2b87da3b | 994 | { |
a233586b | 995 | logit("%s: not implemented!", __func__); |
fa64c868 | 996 | return (0); |
564dd50a | 997 | } |
a05a70ab | 998 | # endif /* UTMPX_USE_LIBRARY */ |
1d7b9b20 | 999 | |
1000 | static int | |
564dd50a | 1001 | utmpx_perform_login(struct logininfo *li) |
1002 | { | |
1d7b9b20 | 1003 | struct utmpx utx; |
1004 | ||
1005 | construct_utmpx(li, &utx); | |
a05a70ab | 1006 | # ifdef UTMPX_USE_LIBRARY |
1d7b9b20 | 1007 | if (!utmpx_write_library(li, &utx)) { |
a233586b | 1008 | logit("%s: utmp_write_library() failed", __func__); |
fa64c868 | 1009 | return (0); |
1d7b9b20 | 1010 | } |
a05a70ab | 1011 | # else |
1d7b9b20 | 1012 | if (!utmpx_write_direct(li, &ut)) { |
a233586b | 1013 | logit("%s: utmp_write_direct() failed", __func__); |
fa64c868 | 1014 | return (0); |
1d7b9b20 | 1015 | } |
a05a70ab | 1016 | # endif |
fa64c868 | 1017 | return (1); |
564dd50a | 1018 | } |
1d7b9b20 | 1019 | |
1020 | ||
1021 | static int | |
564dd50a | 1022 | utmpx_perform_logout(struct logininfo *li) |
1023 | { | |
1d7b9b20 | 1024 | struct utmpx utx; |
1025 | ||
f3837bc6 | 1026 | construct_utmpx(li, &utx); |
a05a70ab | 1027 | # ifdef HAVE_ID_IN_UTMPX |
1d7b9b20 | 1028 | line_abbrevname(utx.ut_id, li->line, sizeof(utx.ut_id)); |
a05a70ab | 1029 | # endif |
1030 | # ifdef HAVE_TYPE_IN_UTMPX | |
1d7b9b20 | 1031 | utx.ut_type = DEAD_PROCESS; |
a05a70ab | 1032 | # endif |
1d7b9b20 | 1033 | |
a05a70ab | 1034 | # ifdef UTMPX_USE_LIBRARY |
1d7b9b20 | 1035 | utmpx_write_library(li, &utx); |
a05a70ab | 1036 | # else |
1d7b9b20 | 1037 | utmpx_write_direct(li, &utx); |
a05a70ab | 1038 | # endif |
fa64c868 | 1039 | return (1); |
564dd50a | 1040 | } |
1d7b9b20 | 1041 | |
1d7b9b20 | 1042 | int |
564dd50a | 1043 | utmpx_write_entry(struct logininfo *li) |
1044 | { | |
1d7b9b20 | 1045 | switch(li->type) { |
1046 | case LTYPE_LOGIN: | |
fa64c868 | 1047 | return (utmpx_perform_login(li)); |
1d7b9b20 | 1048 | case LTYPE_LOGOUT: |
fa64c868 | 1049 | return (utmpx_perform_logout(li)); |
1d7b9b20 | 1050 | default: |
a233586b | 1051 | logit("%s: invalid type field", __func__); |
fa64c868 | 1052 | return (0); |
1d7b9b20 | 1053 | } |
564dd50a | 1054 | } |
a05a70ab | 1055 | #endif /* USE_UTMPX */ |
1d7b9b20 | 1056 | |
1057 | ||
1058 | /** | |
564dd50a | 1059 | ** Low-level wtmp functions |
1d7b9b20 | 1060 | **/ |
1061 | ||
2b87da3b | 1062 | #ifdef USE_WTMP |
1d7b9b20 | 1063 | |
d1cf9a87 | 1064 | /* |
fa64c868 | 1065 | * Write a wtmp entry direct to the end of the file |
1066 | * This is a slight modification of code in OpenBSD's logwtmp.c | |
1067 | */ | |
1d7b9b20 | 1068 | static int |
564dd50a | 1069 | wtmp_write(struct logininfo *li, struct utmp *ut) |
1070 | { | |
1d7b9b20 | 1071 | struct stat buf; |
1072 | int fd, ret = 1; | |
1073 | ||
1074 | if ((fd = open(WTMP_FILE, O_WRONLY|O_APPEND, 0)) < 0) { | |
a233586b | 1075 | logit("%s: problem writing %s: %s", __func__, |
1d7b9b20 | 1076 | WTMP_FILE, strerror(errno)); |
fa64c868 | 1077 | return (0); |
1d7b9b20 | 1078 | } |
2b87da3b | 1079 | if (fstat(fd, &buf) == 0) |
d72f7b79 | 1080 | if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) { |
1d7b9b20 | 1081 | ftruncate(fd, buf.st_size); |
a233586b | 1082 | logit("%s: problem writing %s: %s", __func__, |
1d7b9b20 | 1083 | WTMP_FILE, strerror(errno)); |
1084 | ret = 0; | |
1085 | } | |
fa64c868 | 1086 | close(fd); |
1087 | return (ret); | |
564dd50a | 1088 | } |
1d7b9b20 | 1089 | |
1d7b9b20 | 1090 | static int |
a05a70ab | 1091 | wtmp_perform_login(struct logininfo *li) |
1092 | { | |
1d7b9b20 | 1093 | struct utmp ut; |
1094 | ||
1095 | construct_utmp(li, &ut); | |
fa64c868 | 1096 | return (wtmp_write(li, &ut)); |
564dd50a | 1097 | } |
1d7b9b20 | 1098 | |
1099 | ||
1100 | static int | |
564dd50a | 1101 | wtmp_perform_logout(struct logininfo *li) |
1102 | { | |
1d7b9b20 | 1103 | struct utmp ut; |
1104 | ||
1105 | construct_utmp(li, &ut); | |
fa64c868 | 1106 | return (wtmp_write(li, &ut)); |
564dd50a | 1107 | } |
1d7b9b20 | 1108 | |
1109 | ||
1110 | int | |
564dd50a | 1111 | wtmp_write_entry(struct logininfo *li) |
1112 | { | |
1d7b9b20 | 1113 | switch(li->type) { |
1114 | case LTYPE_LOGIN: | |
fa64c868 | 1115 | return (wtmp_perform_login(li)); |
1d7b9b20 | 1116 | case LTYPE_LOGOUT: |
fa64c868 | 1117 | return (wtmp_perform_logout(li)); |
1d7b9b20 | 1118 | default: |
a233586b | 1119 | logit("%s: invalid type field", __func__); |
fa64c868 | 1120 | return (0); |
1d7b9b20 | 1121 | } |
564dd50a | 1122 | } |
1d7b9b20 | 1123 | |
1124 | ||
d1cf9a87 | 1125 | /* |
fa64c868 | 1126 | * Notes on fetching login data from wtmp/wtmpx |
2b87da3b | 1127 | * |
5abcdf8e | 1128 | * Logouts are usually recorded with (amongst other things) a blank |
1129 | * username on a given tty line. However, some systems (HP-UX is one) | |
1130 | * leave all fields set, but change the ut_type field to DEAD_PROCESS. | |
1131 | * | |
1132 | * Since we're only looking for logins here, we know that the username | |
1133 | * must be set correctly. On systems that leave it in, we check for | |
1134 | * ut_type==USER_PROCESS (indicating a login.) | |
1135 | * | |
1136 | * Portability: Some systems may set something other than USER_PROCESS | |
1137 | * to indicate a login process. I don't know of any as I write. Also, | |
1138 | * it's possible that some systems may both leave the username in | |
1139 | * place and not have ut_type. | |
1140 | */ | |
1141 | ||
5abcdf8e | 1142 | /* return true if this wtmp entry indicates a login */ |
1143 | static int | |
1144 | wtmp_islogin(struct logininfo *li, struct utmp *ut) | |
1145 | { | |
2b87da3b | 1146 | if (strncmp(li->username, ut->ut_name, |
fa64c868 | 1147 | MIN_SIZEOF(li->username, ut->ut_name)) == 0) { |
a05a70ab | 1148 | # ifdef HAVE_TYPE_IN_UTMP |
5abcdf8e | 1149 | if (ut->ut_type & USER_PROCESS) |
fa64c868 | 1150 | return (1); |
a05a70ab | 1151 | # else |
fa64c868 | 1152 | return (1); |
a05a70ab | 1153 | # endif |
5abcdf8e | 1154 | } |
fa64c868 | 1155 | return (0); |
5abcdf8e | 1156 | } |
1157 | ||
1d7b9b20 | 1158 | int |
564dd50a | 1159 | wtmp_get_entry(struct logininfo *li) |
1160 | { | |
1d7b9b20 | 1161 | struct stat st; |
1162 | struct utmp ut; | |
fa64c868 | 1163 | int fd, found = 0; |
5abcdf8e | 1164 | |
1165 | /* Clear the time entries in our logininfo */ | |
1166 | li->tv_sec = li->tv_usec = 0; | |
1d7b9b20 | 1167 | |
1168 | if ((fd = open(WTMP_FILE, O_RDONLY)) < 0) { | |
d1cf9a87 | 1169 | logit("%s: problem opening %s: %s", __func__, |
1d7b9b20 | 1170 | WTMP_FILE, strerror(errno)); |
fa64c868 | 1171 | return (0); |
1d7b9b20 | 1172 | } |
2b87da3b | 1173 | if (fstat(fd, &st) != 0) { |
d1cf9a87 | 1174 | logit("%s: couldn't stat %s: %s", __func__, |
1d7b9b20 | 1175 | WTMP_FILE, strerror(errno)); |
1176 | close(fd); | |
fa64c868 | 1177 | return (0); |
1d7b9b20 | 1178 | } |
1d7b9b20 | 1179 | |
5abcdf8e | 1180 | /* Seek to the start of the last struct utmp */ |
d9d47a26 | 1181 | if (lseek(fd, -(off_t)sizeof(struct utmp), SEEK_END) == -1) { |
5abcdf8e | 1182 | /* Looks like we've got a fresh wtmp file */ |
1183 | close(fd); | |
fa64c868 | 1184 | return (0); |
5abcdf8e | 1185 | } |
1186 | ||
1187 | while (!found) { | |
9f32ceb4 | 1188 | if (atomicio(read, fd, &ut, sizeof(ut)) != sizeof(ut)) { |
d1cf9a87 | 1189 | logit("%s: read of %s failed: %s", __func__, |
1d7b9b20 | 1190 | WTMP_FILE, strerror(errno)); |
1191 | close (fd); | |
fa64c868 | 1192 | return (0); |
1d7b9b20 | 1193 | } |
5abcdf8e | 1194 | if ( wtmp_islogin(li, &ut) ) { |
1195 | found = 1; | |
fa64c868 | 1196 | /* |
1197 | * We've already checked for a time in struct | |
1198 | * utmp, in login_getlast() | |
1199 | */ | |
a05a70ab | 1200 | # ifdef HAVE_TIME_IN_UTMP |
1d7b9b20 | 1201 | li->tv_sec = ut.ut_time; |
a05a70ab | 1202 | # else |
1d7b9b20 | 1203 | # if HAVE_TV_IN_UTMP |
1204 | li->tv_sec = ut.ut_tv.tv_sec; | |
1205 | # endif | |
a05a70ab | 1206 | # endif |
5abcdf8e | 1207 | line_fullname(li->line, ut.ut_line, |
fa64c868 | 1208 | MIN_SIZEOF(li->line, ut.ut_line)); |
a05a70ab | 1209 | # ifdef HAVE_HOST_IN_UTMP |
5abcdf8e | 1210 | strlcpy(li->hostname, ut.ut_host, |
fa64c868 | 1211 | MIN_SIZEOF(li->hostname, ut.ut_host)); |
a05a70ab | 1212 | # endif |
5abcdf8e | 1213 | continue; |
1d7b9b20 | 1214 | } |
5abcdf8e | 1215 | /* Seek back 2 x struct utmp */ |
d9d47a26 | 1216 | if (lseek(fd, -(off_t)(2 * sizeof(struct utmp)), SEEK_CUR) == -1) { |
5abcdf8e | 1217 | /* We've found the start of the file, so quit */ |
fa64c868 | 1218 | close(fd); |
1219 | return (0); | |
1d7b9b20 | 1220 | } |
5abcdf8e | 1221 | } |
1222 | ||
1223 | /* We found an entry. Tidy up and return */ | |
1224 | close(fd); | |
fa64c868 | 1225 | return (1); |
564dd50a | 1226 | } |
a05a70ab | 1227 | # endif /* USE_WTMP */ |
1d7b9b20 | 1228 | |
1229 | ||
1230 | /** | |
564dd50a | 1231 | ** Low-level wtmpx functions |
1d7b9b20 | 1232 | **/ |
1233 | ||
1234 | #ifdef USE_WTMPX | |
fa64c868 | 1235 | /* |
1236 | * Write a wtmpx entry direct to the end of the file | |
1237 | * This is a slight modification of code in OpenBSD's logwtmp.c | |
1238 | */ | |
1d7b9b20 | 1239 | static int |
564dd50a | 1240 | wtmpx_write(struct logininfo *li, struct utmpx *utx) |
1241 | { | |
41c64c91 | 1242 | #ifndef HAVE_UPDWTMPX |
1d7b9b20 | 1243 | struct stat buf; |
1244 | int fd, ret = 1; | |
1245 | ||
1246 | if ((fd = open(WTMPX_FILE, O_WRONLY|O_APPEND, 0)) < 0) { | |
d1cf9a87 | 1247 | logit("%s: problem opening %s: %s", __func__, |
1d7b9b20 | 1248 | WTMPX_FILE, strerror(errno)); |
fa64c868 | 1249 | return (0); |
1d7b9b20 | 1250 | } |
1251 | ||
2b87da3b | 1252 | if (fstat(fd, &buf) == 0) |
d72f7b79 | 1253 | if (atomicio(vwrite, fd, utx, sizeof(*utx)) != sizeof(*utx)) { |
1d7b9b20 | 1254 | ftruncate(fd, buf.st_size); |
a233586b | 1255 | logit("%s: problem writing %s: %s", __func__, |
1d7b9b20 | 1256 | WTMPX_FILE, strerror(errno)); |
1257 | ret = 0; | |
1258 | } | |
fa64c868 | 1259 | close(fd); |
1d7b9b20 | 1260 | |
fa64c868 | 1261 | return (ret); |
41c64c91 | 1262 | #else |
1263 | updwtmpx(WTMPX_FILE, utx); | |
fa64c868 | 1264 | return (1); |
41c64c91 | 1265 | #endif |
564dd50a | 1266 | } |
1d7b9b20 | 1267 | |
1268 | ||
1269 | static int | |
564dd50a | 1270 | wtmpx_perform_login(struct logininfo *li) |
1271 | { | |
1d7b9b20 | 1272 | struct utmpx utx; |
1273 | ||
1274 | construct_utmpx(li, &utx); | |
fa64c868 | 1275 | return (wtmpx_write(li, &utx)); |
564dd50a | 1276 | } |
1d7b9b20 | 1277 | |
1278 | ||
1279 | static int | |
564dd50a | 1280 | wtmpx_perform_logout(struct logininfo *li) |
1281 | { | |
1d7b9b20 | 1282 | struct utmpx utx; |
1283 | ||
1284 | construct_utmpx(li, &utx); | |
fa64c868 | 1285 | return (wtmpx_write(li, &utx)); |
564dd50a | 1286 | } |
1d7b9b20 | 1287 | |
1288 | ||
1289 | int | |
564dd50a | 1290 | wtmpx_write_entry(struct logininfo *li) |
1291 | { | |
1d7b9b20 | 1292 | switch(li->type) { |
1293 | case LTYPE_LOGIN: | |
fa64c868 | 1294 | return (wtmpx_perform_login(li)); |
1d7b9b20 | 1295 | case LTYPE_LOGOUT: |
fa64c868 | 1296 | return (wtmpx_perform_logout(li)); |
1d7b9b20 | 1297 | default: |
a233586b | 1298 | logit("%s: invalid type field", __func__); |
fa64c868 | 1299 | return (0); |
1d7b9b20 | 1300 | } |
564dd50a | 1301 | } |
1d7b9b20 | 1302 | |
5abcdf8e | 1303 | /* Please see the notes above wtmp_islogin() for information about the |
1304 | next two functions */ | |
1305 | ||
1306 | /* Return true if this wtmpx entry indicates a login */ | |
1307 | static int | |
1308 | wtmpx_islogin(struct logininfo *li, struct utmpx *utx) | |
1309 | { | |
fa64c868 | 1310 | if (strncmp(li->username, utx->ut_name, |
1311 | MIN_SIZEOF(li->username, utx->ut_name)) == 0 ) { | |
a05a70ab | 1312 | # ifdef HAVE_TYPE_IN_UTMPX |
5abcdf8e | 1313 | if (utx->ut_type == USER_PROCESS) |
fa64c868 | 1314 | return (1); |
a05a70ab | 1315 | # else |
fa64c868 | 1316 | return (1); |
a05a70ab | 1317 | # endif |
5abcdf8e | 1318 | } |
fa64c868 | 1319 | return (0); |
5abcdf8e | 1320 | } |
1321 | ||
1d7b9b20 | 1322 | |
1323 | int | |
564dd50a | 1324 | wtmpx_get_entry(struct logininfo *li) |
1325 | { | |
1d7b9b20 | 1326 | struct stat st; |
1327 | struct utmpx utx; | |
5abcdf8e | 1328 | int fd, found=0; |
1329 | ||
1330 | /* Clear the time entries */ | |
1331 | li->tv_sec = li->tv_usec = 0; | |
1d7b9b20 | 1332 | |
1333 | if ((fd = open(WTMPX_FILE, O_RDONLY)) < 0) { | |
d1cf9a87 | 1334 | logit("%s: problem opening %s: %s", __func__, |
1d7b9b20 | 1335 | WTMPX_FILE, strerror(errno)); |
fa64c868 | 1336 | return (0); |
1d7b9b20 | 1337 | } |
2b87da3b | 1338 | if (fstat(fd, &st) != 0) { |
d1cf9a87 | 1339 | logit("%s: couldn't stat %s: %s", __func__, |
fdebdd4f | 1340 | WTMPX_FILE, strerror(errno)); |
1d7b9b20 | 1341 | close(fd); |
fa64c868 | 1342 | return (0); |
1d7b9b20 | 1343 | } |
2b87da3b | 1344 | |
5abcdf8e | 1345 | /* Seek to the start of the last struct utmpx */ |
d9d47a26 | 1346 | if (lseek(fd, -(off_t)sizeof(struct utmpx), SEEK_END) == -1 ) { |
5abcdf8e | 1347 | /* probably a newly rotated wtmpx file */ |
1348 | close(fd); | |
fa64c868 | 1349 | return (0); |
5abcdf8e | 1350 | } |
1d7b9b20 | 1351 | |
5abcdf8e | 1352 | while (!found) { |
9f32ceb4 | 1353 | if (atomicio(read, fd, &utx, sizeof(utx)) != sizeof(utx)) { |
d1cf9a87 | 1354 | logit("%s: read of %s failed: %s", __func__, |
1d7b9b20 | 1355 | WTMPX_FILE, strerror(errno)); |
1356 | close (fd); | |
fa64c868 | 1357 | return (0); |
1d7b9b20 | 1358 | } |
fa64c868 | 1359 | /* |
d1cf9a87 | 1360 | * Logouts are recorded as a blank username on a particular |
fa64c868 | 1361 | * line. So, we just need to find the username in struct utmpx |
1362 | */ | |
1363 | if (wtmpx_islogin(li, &utx)) { | |
d80063fe | 1364 | found = 1; |
fa64c868 | 1365 | # if defined(HAVE_TV_IN_UTMPX) |
1d7b9b20 | 1366 | li->tv_sec = utx.ut_tv.tv_sec; |
fa64c868 | 1367 | # elif defined(HAVE_TIME_IN_UTMPX) |
1d7b9b20 | 1368 | li->tv_sec = utx.ut_time; |
a05a70ab | 1369 | # endif |
a4d05724 | 1370 | line_fullname(li->line, utx.ut_line, sizeof(li->line)); |
fa64c868 | 1371 | # if defined(HAVE_HOST_IN_UTMPX) |
5abcdf8e | 1372 | strlcpy(li->hostname, utx.ut_host, |
fa64c868 | 1373 | MIN_SIZEOF(li->hostname, utx.ut_host)); |
a05a70ab | 1374 | # endif |
5abcdf8e | 1375 | continue; |
1d7b9b20 | 1376 | } |
d9d47a26 | 1377 | if (lseek(fd, -(off_t)(2 * sizeof(struct utmpx)), SEEK_CUR) == -1) { |
fa64c868 | 1378 | close(fd); |
1379 | return (0); | |
1d7b9b20 | 1380 | } |
5abcdf8e | 1381 | } |
1382 | ||
1383 | close(fd); | |
fa64c868 | 1384 | return (1); |
564dd50a | 1385 | } |
f988dce5 | 1386 | #endif /* USE_WTMPX */ |
1d7b9b20 | 1387 | |
1d7b9b20 | 1388 | /** |
564dd50a | 1389 | ** Low-level libutil login() functions |
1d7b9b20 | 1390 | **/ |
1391 | ||
1392 | #ifdef USE_LOGIN | |
1d7b9b20 | 1393 | static int |
564dd50a | 1394 | syslogin_perform_login(struct logininfo *li) |
1395 | { | |
1d7b9b20 | 1396 | struct utmp *ut; |
1397 | ||
7a52470e | 1398 | ut = xmalloc(sizeof(*ut)); |
1d7b9b20 | 1399 | construct_utmp(li, ut); |
1400 | login(ut); | |
6cef88bc | 1401 | free(ut); |
1d7b9b20 | 1402 | |
fa64c868 | 1403 | return (1); |
564dd50a | 1404 | } |
1d7b9b20 | 1405 | |
564dd50a | 1406 | static int |
1407 | syslogin_perform_logout(struct logininfo *li) | |
1408 | { | |
a05a70ab | 1409 | # ifdef HAVE_LOGOUT |
f20d4564 | 1410 | char line[UT_LINESIZE]; |
2b87da3b | 1411 | |
1d7b9b20 | 1412 | (void)line_stripname(line, li->line, sizeof(line)); |
1413 | ||
fa64c868 | 1414 | if (!logout(line)) |
a233586b | 1415 | logit("%s: logout() returned an error", __func__); |
a05a70ab | 1416 | # ifdef HAVE_LOGWTMP |
fa64c868 | 1417 | else |
1d7b9b20 | 1418 | logwtmp(line, "", ""); |
a05a70ab | 1419 | # endif |
5abcdf8e | 1420 | /* FIXME: (ATL - if the need arises) What to do if we have |
1421 | * login, but no logout? what if logout but no logwtmp? All | |
1422 | * routines are in libutil so they should all be there, | |
1423 | * but... */ | |
a05a70ab | 1424 | # endif |
fa64c868 | 1425 | return (1); |
564dd50a | 1426 | } |
1d7b9b20 | 1427 | |
1d7b9b20 | 1428 | int |
564dd50a | 1429 | syslogin_write_entry(struct logininfo *li) |
1430 | { | |
1d7b9b20 | 1431 | switch (li->type) { |
1432 | case LTYPE_LOGIN: | |
fa64c868 | 1433 | return (syslogin_perform_login(li)); |
1d7b9b20 | 1434 | case LTYPE_LOGOUT: |
fa64c868 | 1435 | return (syslogin_perform_logout(li)); |
1d7b9b20 | 1436 | default: |
a233586b | 1437 | logit("%s: Invalid type field", __func__); |
fa64c868 | 1438 | return (0); |
1d7b9b20 | 1439 | } |
564dd50a | 1440 | } |
f988dce5 | 1441 | #endif /* USE_LOGIN */ |
1d7b9b20 | 1442 | |
1443 | /* end of file log-syslogin.c */ | |
1444 | ||
1d7b9b20 | 1445 | /** |
564dd50a | 1446 | ** Low-level lastlog functions |
1d7b9b20 | 1447 | **/ |
1448 | ||
1449 | #ifdef USE_LASTLOG | |
a05a70ab | 1450 | #define LL_FILE 1 |
1451 | #define LL_DIR 2 | |
1452 | #define LL_OTHER 3 | |
1d7b9b20 | 1453 | |
1d7b9b20 | 1454 | static void |
564dd50a | 1455 | lastlog_construct(struct logininfo *li, struct lastlog *last) |
1456 | { | |
1d7b9b20 | 1457 | /* clear the structure */ |
dbaa2e87 | 1458 | memset(last, '\0', sizeof(*last)); |
2b87da3b | 1459 | |
fa64c868 | 1460 | line_stripname(last->ll_line, li->line, sizeof(last->ll_line)); |
5abcdf8e | 1461 | strlcpy(last->ll_host, li->hostname, |
1462 | MIN_SIZEOF(last->ll_host, li->hostname)); | |
1d7b9b20 | 1463 | last->ll_time = li->tv_sec; |
564dd50a | 1464 | } |
1d7b9b20 | 1465 | |
1d7b9b20 | 1466 | static int |
564dd50a | 1467 | lastlog_filetype(char *filename) |
1468 | { | |
1d7b9b20 | 1469 | struct stat st; |
1470 | ||
a05a70ab | 1471 | if (stat(LASTLOG_FILE, &st) != 0) { |
a233586b | 1472 | logit("%s: Couldn't stat %s: %s", __func__, |
fa64c868 | 1473 | LASTLOG_FILE, strerror(errno)); |
1474 | return (0); | |
1d7b9b20 | 1475 | } |
1d7b9b20 | 1476 | if (S_ISDIR(st.st_mode)) |
fa64c868 | 1477 | return (LL_DIR); |
1d7b9b20 | 1478 | else if (S_ISREG(st.st_mode)) |
fa64c868 | 1479 | return (LL_FILE); |
1d7b9b20 | 1480 | else |
fa64c868 | 1481 | return (LL_OTHER); |
564dd50a | 1482 | } |
1d7b9b20 | 1483 | |
1484 | ||
1485 | /* open the file (using filemode) and seek to the login entry */ | |
1486 | static int | |
564dd50a | 1487 | lastlog_openseek(struct logininfo *li, int *fd, int filemode) |
1488 | { | |
1d7b9b20 | 1489 | off_t offset; |
1490 | int type; | |
1491 | char lastlog_file[1024]; | |
1492 | ||
1493 | type = lastlog_filetype(LASTLOG_FILE); | |
1494 | switch (type) { | |
fa64c868 | 1495 | case LL_FILE: |
1496 | strlcpy(lastlog_file, LASTLOG_FILE, | |
1497 | sizeof(lastlog_file)); | |
1498 | break; | |
1499 | case LL_DIR: | |
1500 | snprintf(lastlog_file, sizeof(lastlog_file), "%s/%s", | |
1501 | LASTLOG_FILE, li->username); | |
1502 | break; | |
1503 | default: | |
a233586b | 1504 | logit("%s: %.100s is not a file or directory!", __func__, |
fa64c868 | 1505 | LASTLOG_FILE); |
1506 | return (0); | |
a05a70ab | 1507 | } |
1d7b9b20 | 1508 | |
ee476051 | 1509 | *fd = open(lastlog_file, filemode, 0600); |
fa64c868 | 1510 | if (*fd < 0) { |
a233586b | 1511 | debug("%s: Couldn't open %s: %s", __func__, |
1d7b9b20 | 1512 | lastlog_file, strerror(errno)); |
fa64c868 | 1513 | return (0); |
1d7b9b20 | 1514 | } |
2b87da3b | 1515 | |
d93a7e5a | 1516 | if (type == LL_FILE) { |
1517 | /* find this uid's offset in the lastlog file */ | |
d9d47a26 | 1518 | offset = (off_t) ((long)li->uid * sizeof(struct lastlog)); |
1d7b9b20 | 1519 | |
fa64c868 | 1520 | if (lseek(*fd, offset, SEEK_SET) != offset) { |
a233586b | 1521 | logit("%s: %s->lseek(): %s", __func__, |
1522 | lastlog_file, strerror(errno)); | |
fa64c868 | 1523 | return (0); |
d93a7e5a | 1524 | } |
1d7b9b20 | 1525 | } |
2b87da3b | 1526 | |
fa64c868 | 1527 | return (1); |
564dd50a | 1528 | } |
1d7b9b20 | 1529 | |
1530 | static int | |
564dd50a | 1531 | lastlog_perform_login(struct logininfo *li) |
1532 | { | |
1d7b9b20 | 1533 | struct lastlog last; |
1534 | int fd; | |
1535 | ||
1536 | /* create our struct lastlog */ | |
1537 | lastlog_construct(li, &last); | |
1538 | ||
ee476051 | 1539 | if (!lastlog_openseek(li, &fd, O_RDWR|O_CREAT)) |
fa64c868 | 1540 | return (0); |
2b87da3b | 1541 | |
1d7b9b20 | 1542 | /* write the entry */ |
d72f7b79 | 1543 | if (atomicio(vwrite, fd, &last, sizeof(last)) != sizeof(last)) { |
1a022229 | 1544 | close(fd); |
a233586b | 1545 | logit("%s: Error writing to %s: %s", __func__, |
1a022229 | 1546 | LASTLOG_FILE, strerror(errno)); |
fa64c868 | 1547 | return (0); |
a05a70ab | 1548 | } |
1a022229 | 1549 | |
1550 | close(fd); | |
fa64c868 | 1551 | return (1); |
564dd50a | 1552 | } |
1d7b9b20 | 1553 | |
1d7b9b20 | 1554 | int |
564dd50a | 1555 | lastlog_write_entry(struct logininfo *li) |
1556 | { | |
1d7b9b20 | 1557 | switch(li->type) { |
1558 | case LTYPE_LOGIN: | |
fa64c868 | 1559 | return (lastlog_perform_login(li)); |
1d7b9b20 | 1560 | default: |
a233586b | 1561 | logit("%s: Invalid type field", __func__); |
fa64c868 | 1562 | return (0); |
1d7b9b20 | 1563 | } |
564dd50a | 1564 | } |
1d7b9b20 | 1565 | |
1d7b9b20 | 1566 | static void |
564dd50a | 1567 | lastlog_populate_entry(struct logininfo *li, struct lastlog *last) |
1568 | { | |
1d7b9b20 | 1569 | line_fullname(li->line, last->ll_line, sizeof(li->line)); |
2b87da3b | 1570 | strlcpy(li->hostname, last->ll_host, |
fa64c868 | 1571 | MIN_SIZEOF(li->hostname, last->ll_host)); |
1d7b9b20 | 1572 | li->tv_sec = last->ll_time; |
564dd50a | 1573 | } |
1d7b9b20 | 1574 | |
1d7b9b20 | 1575 | int |
564dd50a | 1576 | lastlog_get_entry(struct logininfo *li) |
1577 | { | |
1d7b9b20 | 1578 | struct lastlog last; |
ed05a983 | 1579 | int fd, ret; |
1d7b9b20 | 1580 | |
ce49121d | 1581 | if (!lastlog_openseek(li, &fd, O_RDONLY)) |
ed05a983 | 1582 | return (0); |
ce49121d | 1583 | |
ed05a983 | 1584 | ret = atomicio(read, fd, &last, sizeof(last)); |
ce49121d | 1585 | close(fd); |
1586 | ||
ed05a983 | 1587 | switch (ret) { |
1588 | case 0: | |
1589 | memset(&last, '\0', sizeof(last)); | |
1590 | /* FALLTHRU */ | |
1591 | case sizeof(last): | |
1592 | lastlog_populate_entry(li, &last); | |
1593 | return (1); | |
1594 | case -1: | |
aff51935 | 1595 | error("%s: Error reading from %s: %s", __func__, |
ed05a983 | 1596 | LASTLOG_FILE, strerror(errno)); |
1597 | return (0); | |
1598 | default: | |
1599 | error("%s: Error reading from %s: Expecting %d, got %d", | |
dfde7f6e | 1600 | __func__, LASTLOG_FILE, (int)sizeof(last), ret); |
ed05a983 | 1601 | return (0); |
1602 | } | |
ce49121d | 1603 | |
ed05a983 | 1604 | /* NOTREACHED */ |
1605 | return (0); | |
564dd50a | 1606 | } |
f988dce5 | 1607 | #endif /* USE_LASTLOG */ |
b6610e8f | 1608 | |
1609 | #ifdef USE_BTMP | |
1610 | /* | |
1611 | * Logs failed login attempts in _PATH_BTMP if that exists. | |
1612 | * The most common login failure is to give password instead of username. | |
1613 | * So the _PATH_BTMP file checked for the correct permission, so that | |
1614 | * only root can read it. | |
1615 | */ | |
1616 | ||
1617 | void | |
1618 | record_failed_login(const char *username, const char *hostname, | |
1619 | const char *ttyn) | |
1620 | { | |
1621 | int fd; | |
1622 | struct utmp ut; | |
1623 | struct sockaddr_storage from; | |
dfde7f6e | 1624 | socklen_t fromlen = sizeof(from); |
b6610e8f | 1625 | struct sockaddr_in *a4; |
1626 | struct sockaddr_in6 *a6; | |
1627 | time_t t; | |
1628 | struct stat fst; | |
1629 | ||
1630 | if (geteuid() != 0) | |
1631 | return; | |
1632 | if ((fd = open(_PATH_BTMP, O_WRONLY | O_APPEND)) < 0) { | |
1633 | debug("Unable to open the btmp file %s: %s", _PATH_BTMP, | |
1634 | strerror(errno)); | |
1635 | return; | |
1636 | } | |
1637 | if (fstat(fd, &fst) < 0) { | |
1638 | logit("%s: fstat of %s failed: %s", __func__, _PATH_BTMP, | |
1639 | strerror(errno)); | |
1640 | goto out; | |
1641 | } | |
1642 | if((fst.st_mode & (S_IRWXG | S_IRWXO)) || (fst.st_uid != 0)){ | |
1643 | logit("Excess permission or bad ownership on file %s", | |
1644 | _PATH_BTMP); | |
1645 | goto out; | |
1646 | } | |
1647 | ||
1648 | memset(&ut, 0, sizeof(ut)); | |
1649 | /* strncpy because we don't necessarily want nul termination */ | |
1650 | strncpy(ut.ut_user, username, sizeof(ut.ut_user)); | |
1651 | strlcpy(ut.ut_line, "ssh:notty", sizeof(ut.ut_line)); | |
1652 | ||
1653 | time(&t); | |
1654 | ut.ut_time = t; /* ut_time is not always a time_t */ | |
1655 | ut.ut_type = LOGIN_PROCESS; | |
1656 | ut.ut_pid = getpid(); | |
1657 | ||
1658 | /* strncpy because we don't necessarily want nul termination */ | |
1659 | strncpy(ut.ut_host, hostname, sizeof(ut.ut_host)); | |
1660 | ||
1661 | if (packet_connection_is_on_socket() && | |
1662 | getpeername(packet_get_connection_in(), | |
1663 | (struct sockaddr *)&from, &fromlen) == 0) { | |
1664 | ipv64_normalise_mapped(&from, &fromlen); | |
1665 | if (from.ss_family == AF_INET) { | |
1666 | a4 = (struct sockaddr_in *)&from; | |
1667 | memcpy(&ut.ut_addr, &(a4->sin_addr), | |
1668 | MIN_SIZEOF(ut.ut_addr, a4->sin_addr)); | |
1669 | } | |
1670 | #ifdef HAVE_ADDR_V6_IN_UTMP | |
1671 | if (from.ss_family == AF_INET6) { | |
1672 | a6 = (struct sockaddr_in6 *)&from; | |
1673 | memcpy(&ut.ut_addr_v6, &(a6->sin6_addr), | |
1674 | MIN_SIZEOF(ut.ut_addr_v6, a6->sin6_addr)); | |
1675 | } | |
1676 | #endif | |
1677 | } | |
1678 | ||
1679 | if (atomicio(vwrite, fd, &ut, sizeof(ut)) != sizeof(ut)) | |
1680 | error("Failed to write to %s: %s", _PATH_BTMP, | |
1681 | strerror(errno)); | |
1682 | ||
1683 | out: | |
1684 | close(fd); | |
1685 | } | |
1686 | #endif /* USE_BTMP */ |