andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2000 Andre Lucas. All rights reserved. |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 3 | * Portions copyright (c) 1998 Todd C. Miller |
| 4 | * Portions copyright (c) 1996 Jason Downs |
| 5 | * Portions copyright (c) 1996 Theo de Raadt |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 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. |
| 15 | * 3. All advertising materials mentioning features or use of this software |
| 16 | * must display the following acknowledgement: |
| 17 | * This product includes software developed by Markus Friedl. |
| 18 | * 4. The name of the author may not be used to endorse or promote products |
| 19 | * derived from this software without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 22 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 23 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 24 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 25 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 26 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 27 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 28 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 29 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 30 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | /** |
| 34 | ** loginrec.c: platform-independent login recording and lastlog retrieval |
| 35 | **/ |
| 36 | |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 37 | /* |
| 38 | The new login code explained |
| 39 | ============================ |
| 40 | |
| 41 | This code attempts to provide a common interface to login recording |
| 42 | (utmp and friends) and last login time retrieval. |
| 43 | |
| 44 | Its primary means of achieving this is to use 'struct logininfo', a |
| 45 | union of all the useful fields in the various different types of |
| 46 | system login record structures one finds on UNIX variants. |
| 47 | |
| 48 | We depend on autoconf to define which recording methods are to be |
| 49 | used, and which fields are contained in the relevant data structures |
| 50 | on the local system. Many C preprocessor symbols affect which code |
| 51 | gets compiled here. |
| 52 | |
| 53 | The code is designed to make it easy to modify a particular |
| 54 | recording method, without affecting other methods nor requiring so |
| 55 | many nested conditional compilation blocks as were commonplace in |
| 56 | the old code. |
| 57 | |
| 58 | For login recording, we try to use the local system's libraries as |
| 59 | these are clearly most likely to work correctly. For utmp systems |
| 60 | this usually means login() and logout() or setutent() etc., probably |
| 61 | in libutil, along with logwtmp() etc. On these systems, we fall back |
| 62 | to writing the files directly if we have to, though this method |
| 63 | requires very thorough testing so we do not corrupt local auditing |
| 64 | information. These files and their access methods are very system |
| 65 | specific indeed. |
| 66 | |
| 67 | For utmpx systems, the corresponding library functions are |
| 68 | setutxent() etc. To the author's knowledge, all utmpx systems have |
| 69 | these library functions and so no direct write is attempted. If such |
| 70 | a system exists and needs support, direct analogues of the [uw]tmp |
| 71 | code should suffice. |
| 72 | |
| 73 | Retrieving the time of last login ('lastlog') is in some ways even |
| 74 | more problemmatic than login recording. Some systems provide a |
| 75 | simple table of all users which we seek based on uid and retrieve a |
| 76 | relatively standard structure. Others record the same information in |
| 77 | a directory with a separate file, and others don't record the |
| 78 | information separately at all. For systems in the latter category, |
| 79 | we look backwards in the wtmp or wtmpx file for the last login entry |
| 80 | for our user. Naturally this is slower and on busy systems could |
| 81 | incur a significant performance penalty. |
| 82 | |
| 83 | Calling the new code |
| 84 | -------------------- |
| 85 | |
| 86 | In OpenSSH all login recording and retrieval is performed in |
| 87 | login.c. Here you'll find working examples. Also, in the logintest.c |
| 88 | program there are more examples. |
| 89 | |
| 90 | Internal handler calling method |
| 91 | ------------------------------- |
| 92 | |
| 93 | When a call is made to login_login() or login_logout(), both |
| 94 | routines set a struct logininfo flag defining which action (log in, |
| 95 | or log out) is to be taken. They both then call login_write(), which |
| 96 | calls whichever of the many structure-specific handlers autoconf |
| 97 | selects for the local system. |
| 98 | |
| 99 | The handlers themselves handle system data structure specifics. Both |
| 100 | struct utmp and struct utmpx have utility functions (see |
| 101 | construct_utmp*()) to try to make it simpler to add extra systems |
| 102 | that introduce new features to either structure. |
| 103 | |
| 104 | While it may seem terribly wasteful to replicate so much similar |
| 105 | code for each method, experience has shown that maintaining code to |
| 106 | write both struct utmp and utmpx in one function, whilst maintaining |
| 107 | support for all systems whether they have library support or not, is |
| 108 | a difficult and time-consuming task. |
| 109 | |
| 110 | Lastlog support proceeds similarly. Functions login_get_lastlog() |
| 111 | (and its OpenSSH-tuned friend login_get_lastlog_time()) call |
| 112 | getlast_entry(), which tries one of three methods to find the last |
| 113 | login time. It uses local system lastlog support if it can, |
| 114 | otherwise it tries wtmp or wtmpx before giving up and returning 0, |
| 115 | meaning "tilt". |
| 116 | |
| 117 | Maintenance |
| 118 | ----------- |
| 119 | |
| 120 | In many cases it's possible to tweak autoconf to select the correct |
| 121 | methods for a particular platform, either by improving the detection |
| 122 | code (best), or by presetting DISABLE_<method> or CONF_<method>_FILE |
| 123 | symbols for the platform. |
| 124 | |
| 125 | Use logintest to check which symbols are defined before modifying |
| 126 | configure.in and loginrec.c. (You have to build logintest yourself |
| 127 | with 'make logintest' as it's not built by default.) |
| 128 | |
| 129 | Otherwise, patches to the specific method(s) are very helpful! |
| 130 | |
| 131 | */ |
| 132 | |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 133 | /** |
| 134 | ** TODO: |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 135 | ** homegrown ttyslot()q |
| 136 | ** test, test, test |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 137 | ** |
| 138 | ** Platform status: |
| 139 | ** ---------------- |
| 140 | ** |
| 141 | ** Known good: |
| 142 | ** Linux (Redhat 6.2, need more variants) |
| 143 | ** HP-UX 10.20 (gcc only) |
| 144 | ** |
| 145 | ** Testing required: Please send reports! |
| 146 | ** Solaris |
| 147 | ** IRIX |
| 148 | ** NetBSD |
| 149 | ** HP-UX 11 |
andre | 60f3c98 | 2000-06-03 16:18:19 +0000 | [diff] [blame] | 150 | ** AIX |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 151 | ** |
| 152 | ** Platforms with known problems: |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 153 | ** NeXT |
| 154 | ** |
| 155 | **/ |
| 156 | |
| 157 | #include "includes.h" |
| 158 | |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 159 | #if HAVE_UTMP_H |
| 160 | # include <utmp.h> |
| 161 | #endif |
| 162 | #if HAVE_UTMPX_H |
| 163 | # include <utmpx.h> |
| 164 | #endif |
| 165 | #if HAVE_LASTLOG_H |
| 166 | # include <lastlog.h> |
| 167 | #endif |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 168 | |
| 169 | #include "ssh.h" |
| 170 | #include "xmalloc.h" |
| 171 | #include "loginrec.h" |
| 172 | |
andre | ecaabf1 | 2000-06-12 22:21:44 +0000 | [diff] [blame] | 173 | RCSID("$Id: loginrec.c,v 1.5 2000/06/12 22:21:44 andre Exp $"); |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 174 | |
| 175 | /** |
| 176 | ** prototypes for helper functions in this file |
| 177 | **/ |
| 178 | |
| 179 | #if HAVE_UTMP_H |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 180 | void set_utmp_time(struct logininfo *li, struct utmp *ut); |
| 181 | void construct_utmp(struct logininfo *li, struct utmp *ut); |
| 182 | #endif |
| 183 | |
| 184 | #ifdef HAVE_UTMPX_H |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 185 | void set_utmpx_time(struct logininfo *li, struct utmpx *ut); |
| 186 | void construct_utmpx(struct logininfo *li, struct utmpx *ut); |
| 187 | #endif |
| 188 | |
| 189 | int utmp_write_entry(struct logininfo *li); |
| 190 | int utmpx_write_entry(struct logininfo *li); |
| 191 | int wtmp_write_entry(struct logininfo *li); |
| 192 | int wtmpx_write_entry(struct logininfo *li); |
| 193 | int lastlog_write_entry(struct logininfo *li); |
| 194 | int syslogin_write_entry(struct logininfo *li); |
| 195 | |
| 196 | int getlast_entry(struct logininfo *li); |
| 197 | int lastlog_get_entry(struct logininfo *li); |
| 198 | int wtmp_get_entry(struct logininfo *li); |
| 199 | int wtmpx_get_entry(struct logininfo *li); |
| 200 | |
| 201 | |
| 202 | /** |
| 203 | ** platform-independent login functions |
| 204 | **/ |
| 205 | |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 206 | /* Record a login */ |
| 207 | int |
| 208 | login_login (struct logininfo *li) |
| 209 | { |
| 210 | li->type = LTYPE_LOGIN; |
| 211 | return login_write(li); |
| 212 | } |
| 213 | |
| 214 | |
| 215 | /* Record a logout */ |
| 216 | int |
| 217 | login_logout(struct logininfo *li) |
| 218 | { |
| 219 | li->type = LTYPE_LOGOUT; |
| 220 | return login_write(li); |
| 221 | } |
| 222 | |
| 223 | |
| 224 | /* Retrieve the last login time for a user (or fake on from wtmp/wtmpx) */ |
| 225 | unsigned int |
| 226 | login_get_lastlog_time(const int uid) |
| 227 | { |
| 228 | struct logininfo li; |
| 229 | |
| 230 | login_get_lastlog(&li, uid); |
| 231 | return li.tv_sec; |
| 232 | } |
| 233 | |
| 234 | /* Retrieve a lastlog entry (or fake one from wtmp/wtmpx) */ |
| 235 | struct logininfo * |
| 236 | login_get_lastlog(struct logininfo *li, const int uid) |
| 237 | { |
| 238 | memset(li, '\0', sizeof(struct logininfo)); |
| 239 | li->uid = uid; |
| 240 | if (getlast_entry(li)) |
| 241 | return li; |
| 242 | else |
| 243 | return 0; |
| 244 | } |
| 245 | |
| 246 | |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 247 | /* login_alloc_entry() - allocate and initialise a logininfo */ |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 248 | struct |
| 249 | logininfo *login_alloc_entry(int pid, const char *username, |
| 250 | const char *hostname, const char *line) |
| 251 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 252 | struct logininfo *newli; |
| 253 | |
| 254 | newli = (struct logininfo *) xmalloc (sizeof(struct logininfo)); |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 255 | (void)login_init_entry(newli, pid, username, hostname, line); |
| 256 | return newli; |
| 257 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 258 | |
| 259 | |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 260 | /* login_free_entry() - free struct memory (trivial) */ |
| 261 | void |
| 262 | login_free_entry(struct logininfo *li) |
| 263 | { |
| 264 | xfree(li); |
| 265 | } |
| 266 | |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 267 | |
| 268 | /* login_init_entry() - initialise a struct logininfo */ |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 269 | int |
| 270 | login_init_entry(struct logininfo *li, int pid, const char *username, |
| 271 | const char *hostname, const char *line) |
| 272 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 273 | /* zero the structure */ |
| 274 | memset(li, 0, sizeof(struct logininfo)); |
| 275 | |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 276 | li->pid = pid; |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 277 | /* set the line information */ |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 278 | if (line) |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 279 | line_fullname(li->line, line, sizeof(li->line)); |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 280 | |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 281 | if (username) |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 282 | strlcpy(li->username, username, sizeof(li->username)); |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 283 | if (hostname) |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 284 | strlcpy(li->hostname, hostname, sizeof(li->hostname)); |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 285 | return 1; |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 286 | } |
| 287 | |
| 288 | |
| 289 | void |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 290 | login_set_current_time(struct logininfo *li) |
| 291 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 292 | #ifdef HAVE_SYS_TIME_H |
| 293 | struct timeval tv; |
| 294 | |
| 295 | gettimeofday(&tv, NULL); |
| 296 | li->tv_sec = tv.tv_sec ; li->tv_usec = tv.tv_usec; |
| 297 | #else |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 298 | time_t tm = time(0); |
| 299 | |
| 300 | li->tv_sec = tm; li->tv_usec = 0; |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 301 | #endif |
| 302 | } |
| 303 | |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 304 | |
| 305 | /* copy a sockaddr_* into our logininfo */ |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 306 | void |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 307 | login_set_addr(struct logininfo *li, const struct sockaddr *sa, |
| 308 | const unsigned int sa_size) |
| 309 | { |
| 310 | unsigned int bufsize = sa_size; |
| 311 | |
| 312 | /* make sure we don't overrun our union */ |
| 313 | if (sizeof(li->hostaddr) < sa_size) |
| 314 | bufsize = sizeof(li->hostaddr); |
| 315 | |
| 316 | memcpy((void *)&(li->hostaddr.sa), (const void *)sa, bufsize); |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 317 | } |
| 318 | |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 319 | |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 320 | /** |
| 321 | ** login_write: Call low-level recording functions based on autoconf |
| 322 | ** results |
| 323 | **/ |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 324 | |
| 325 | int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 326 | login_write (struct logininfo *li) |
| 327 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 328 | if ((int)geteuid() != 0) { |
| 329 | log("Attempt to write login records by non-root user (aborting)"); |
| 330 | return 1; |
| 331 | } |
| 332 | /* set the timestamp */ |
| 333 | login_set_current_time(li); |
| 334 | #ifdef USE_LOGIN |
| 335 | syslogin_write_entry(li); |
| 336 | #endif |
| 337 | #ifdef USE_LASTLOG |
| 338 | if (li->type == LTYPE_LOGIN) { |
| 339 | lastlog_write_entry(li); |
| 340 | } |
| 341 | #endif |
| 342 | #ifdef USE_UTMP |
| 343 | utmp_write_entry(li); |
| 344 | #endif |
| 345 | #ifdef USE_WTMP |
| 346 | wtmp_write_entry(li); |
| 347 | #endif |
| 348 | #ifdef USE_UTMPX |
| 349 | utmpx_write_entry(li); |
| 350 | #endif |
| 351 | #ifdef USE_WTMPX |
| 352 | wtmpx_write_entry(li); |
| 353 | #endif |
| 354 | return 0; |
| 355 | } |
| 356 | |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 357 | |
| 358 | /** |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 359 | ** getlast_entry: Call low-level functions to retrieve the last login |
| 360 | ** time. |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 361 | **/ |
| 362 | |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 363 | /* take the uid in li and return the last login time */ |
| 364 | int |
| 365 | getlast_entry(struct logininfo *li) |
| 366 | { |
| 367 | #ifdef USE_LASTLOG |
| 368 | if (lastlog_get_entry(li)) |
| 369 | return 1; |
| 370 | else |
| 371 | return 0; |
| 372 | #else |
| 373 | /* !USE_LASTLOG */ |
| 374 | |
andre | ecaabf1 | 2000-06-12 22:21:44 +0000 | [diff] [blame] | 375 | # ifdef DISABLE_LASTLOG |
| 376 | /* On some systems we shouldn't even try to obtain last login |
| 377 | * time, e.g. AIX */ |
| 378 | return 0; |
| 379 | |
| 380 | # else |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 381 | /* Try to retrieve the last login time from wtmp */ |
andre | ecaabf1 | 2000-06-12 22:21:44 +0000 | [diff] [blame] | 382 | # if defined(USE_WTMP) && (defined(HAVE_TIME_IN_UTMP) || defined(HAVE_TV_IN_UTMP)) |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 383 | /* retrieve last login time from utmp */ |
| 384 | if (wtmp_get_entry(li)) |
| 385 | return 1; |
| 386 | else |
| 387 | return 0; |
andre | ecaabf1 | 2000-06-12 22:21:44 +0000 | [diff] [blame] | 388 | # else |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 389 | |
| 390 | /* If wtmp isn't available, try wtmpx */ |
| 391 | |
andre | ecaabf1 | 2000-06-12 22:21:44 +0000 | [diff] [blame] | 392 | # if defined(USE_WTMPX) && (defined(HAVE_TIME_IN_UTMPX) || defined(HAVE_TV_IN_UTMPX)) |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 393 | /* retrieve last login time from utmpx */ |
| 394 | if (wtmpx_get_entry(li)) |
| 395 | return 1; |
| 396 | else |
| 397 | return 0; |
andre | ecaabf1 | 2000-06-12 22:21:44 +0000 | [diff] [blame] | 398 | # else |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 399 | |
| 400 | /* Give up: No means of retrieving last login time */ |
| 401 | return 0; |
andre | ecaabf1 | 2000-06-12 22:21:44 +0000 | [diff] [blame] | 402 | # endif |
| 403 | /* USE_WTMPX && (HAVE_TIME_IN_UTMPX || HAVE_TV_IN_UTMPX) */ |
| 404 | |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 405 | # endif |
andre | ecaabf1 | 2000-06-12 22:21:44 +0000 | [diff] [blame] | 406 | /* USE_WTMP && (HAVE_TIME_IN_UTMP || HAVE_TV_IN_UTMP) */ |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 407 | # endif |
andre | ecaabf1 | 2000-06-12 22:21:44 +0000 | [diff] [blame] | 408 | /* DISABLE_LASTLOG */ |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 409 | #endif |
| 410 | /* USE_LASTLOG */ |
| 411 | } |
| 412 | |
| 413 | |
| 414 | |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 415 | /* |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 416 | * 'line' string utility functions |
| 417 | * |
| 418 | * These functions process the 'line' string into one of three forms: |
| 419 | * |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 420 | * 1. The full filename (including '/dev') |
| 421 | * 2. The stripped name (excluding '/dev') |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 422 | * 3. The abbreviated name (e.g. /dev/ttyp00 -> yp00 |
| 423 | * /dev/pts/1 -> ts/1 ) |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 424 | * |
| 425 | * Form 3 is used on some systems to identify a .tmp.? entry when |
| 426 | * attempting to remove it. Typically both addition and removal is |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 427 | * performed by one application - say, sshd - so as long as the choice |
| 428 | * uniquely identifies a terminal it's ok. |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 429 | */ |
| 430 | |
| 431 | |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 432 | /* line_fullname(): add the leading '/dev/' if it doesn't exist make |
| 433 | * sure dst has enough space, if not just copy src (ugh) */ |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 434 | char * |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 435 | line_fullname(char *dst, const char *src, int dstsize) |
| 436 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 437 | memset(dst, '\0', dstsize); |
| 438 | if ((strncmp(src, "/dev/", 5) == 0) || (dstsize < (strlen(src) + 5))) |
| 439 | strlcpy(dst, src, dstsize); |
| 440 | else { |
| 441 | strlcpy(dst, "/dev/", 5); |
| 442 | strlcat(dst, src, dstsize); |
| 443 | } |
| 444 | return dst; |
| 445 | } |
| 446 | |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 447 | |
| 448 | /* line_stripname(): strip the leading '/dev' if it exists, return dst */ |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 449 | char * |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 450 | line_stripname(char *dst, const char *src, int dstsize) |
| 451 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 452 | memset(dst, '\0', dstsize); |
| 453 | if (strncmp(src, "/dev/", 5) == 0) |
| 454 | strlcpy(dst, &src[5], dstsize); |
| 455 | else |
| 456 | strlcpy(dst, src, dstsize); |
| 457 | return dst; |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 458 | } |
| 459 | |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 460 | |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 461 | /* line_abbrevname(): Return the abbreviated (usually four-character) |
| 462 | * form of the line (Just use the last <dstsize> characters of the |
| 463 | * full name.) |
| 464 | * |
| 465 | * NOTE: use strncpy because we do NOT necessarily want zero |
| 466 | * termination */ |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 467 | char * |
| 468 | line_abbrevname(char *dst, const char *src, int dstsize) { |
| 469 | memset(dst, '\0', dstsize); |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 470 | src += (strlen(src) - dstsize); |
| 471 | strncpy(dst, src, dstsize); /* note: _don't_ change this to strlcpy */ |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 472 | return dst; |
| 473 | } |
| 474 | |
| 475 | |
| 476 | /** |
| 477 | ** utmp utility functions |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 478 | ** |
| 479 | ** These functions manipulate struct utmp, taking system differences |
| 480 | ** into account. |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 481 | **/ |
| 482 | |
| 483 | #if defined(USE_UTMP) || defined (USE_WTMP) || defined (USE_LOGIN) |
| 484 | |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 485 | /* build the utmp structure */ |
| 486 | void |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 487 | set_utmp_time(struct logininfo *li, struct utmp *ut) |
| 488 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 489 | #ifdef HAVE_TV_IN_UTMP |
| 490 | ut->ut_tv.tv_sec = li->tv_sec; |
| 491 | ut->ut_tv.tv_usec = li->tv_usec; |
| 492 | #else |
| 493 | # ifdef HAVE_TIME_IN_UTMP |
| 494 | ut->ut_time = li->tv_sec; |
| 495 | # endif |
| 496 | #endif |
| 497 | } |
| 498 | |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 499 | |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 500 | void |
| 501 | construct_utmp(struct logininfo *li, |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 502 | struct utmp *ut) |
| 503 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 504 | memset(ut, '\0', sizeof(struct utmp)); |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 505 | #ifdef HAVE_ID_IN_UTMP |
| 506 | line_abbrevname(ut->ut_id, li->line, sizeof(ut->ut_id)); |
| 507 | #endif |
| 508 | |
| 509 | #ifdef HAVE_TYPE_IN_UTMP |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 510 | /* This is done here to keep utmp constants out of login.h */ |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 511 | switch (li->type) { |
| 512 | case LTYPE_LOGIN: |
| 513 | ut->ut_type = USER_PROCESS; |
| 514 | break; |
| 515 | case LTYPE_LOGOUT: |
| 516 | ut->ut_type = DEAD_PROCESS; |
| 517 | break; |
| 518 | } |
| 519 | #endif |
| 520 | |
| 521 | #ifdef HAVE_PID_IN_UTMP |
| 522 | ut->ut_pid = li->pid; |
| 523 | #endif |
| 524 | line_stripname(ut->ut_line, li->line, sizeof(ut->ut_line)); |
| 525 | strlcpy(ut->ut_name, li->username, sizeof(ut->ut_name)); |
| 526 | set_utmp_time(li, ut); |
| 527 | #ifdef HAVE_HOST_IN_UTMP |
| 528 | strlcpy(ut->ut_host, li->hostname, sizeof(ut->ut_host)); |
| 529 | #endif |
| 530 | #ifdef HAVE_ADDR_IN_UTMP |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 531 | /* this is just a 32-bit IP address */ |
| 532 | if (li->hostaddr.sa.sa_family == AF_INET) |
| 533 | ut->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr; |
| 534 | #endif |
| 535 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 536 | |
| 537 | #endif |
| 538 | /* USE_UTMP || USE_WTMP || USE_LOGIN */ |
| 539 | |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 540 | |
| 541 | |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 542 | /** |
| 543 | ** utmpx utility functions |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 544 | ** |
| 545 | ** These functions manipulate struct utmpx, accounting for system |
| 546 | ** variations. |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 547 | **/ |
| 548 | |
| 549 | #if defined(USE_UTMPX) || defined (USE_WTMPX) |
| 550 | |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 551 | /* build the utmpx structure */ |
| 552 | void |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 553 | set_utmpx_time(struct logininfo *li, struct utmpx *utx) |
| 554 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 555 | #ifdef HAVE_TV_IN_UTMPX |
| 556 | utx->ut_tv.tv_sec = li->tv_sec; |
| 557 | utx->ut_tv.tv_usec = li->tv_usec; |
| 558 | #else |
| 559 | # ifdef HAVE_TIME_IN_UTMPX |
| 560 | utx->ut_time = li->tv_sec; |
| 561 | # endif |
| 562 | #endif |
| 563 | } |
| 564 | |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 565 | |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 566 | void |
| 567 | construct_utmpx(struct logininfo *li, struct utmpx *utx) |
| 568 | { |
| 569 | memset(utx, '\0', sizeof(struct utmpx)); |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 570 | line_abbrevname(utx->ut_id, li->line, sizeof(utx->ut_id)); |
| 571 | |
| 572 | /* this is done here to keep utmp constants out of loginrec.h */ |
| 573 | switch (li->type) { |
| 574 | case LTYPE_LOGIN: |
| 575 | utx->ut_type = USER_PROCESS; |
| 576 | break; |
| 577 | case LTYPE_LOGOUT: |
| 578 | utx->ut_type = DEAD_PROCESS; |
| 579 | break; |
| 580 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 581 | utx->ut_pid = li->pid; |
| 582 | line_stripname(utx->ut_line, li->line, sizeof(utx->ut_line)); |
| 583 | strlcpy(utx->ut_name, li->username, sizeof(utx->ut_name)); |
| 584 | set_utmpx_time(li, utx); |
| 585 | #ifdef HAVE_HOST_IN_UTMPX |
| 586 | strlcpy(utx->ut_host, li->hostname, sizeof(utx->ut_host)); |
| 587 | #endif |
| 588 | #ifdef HAVE_ADDR_IN_UTMPX |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 589 | /* FIXME: (ATL) not supported yet */ |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 590 | #endif |
| 591 | #ifdef HAVE_SYSLEN_IN_UTMPX |
| 592 | /* this is safe because of the extra nulls in logininfo */ |
| 593 | utx->ut_syslen = strlen(li->hostname); |
| 594 | #endif |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 595 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 596 | |
| 597 | #endif |
| 598 | /* USE_UTMPX || USE_WTMPX */ |
| 599 | |
| 600 | |
| 601 | |
| 602 | /** |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 603 | ** Low-level utmp functions |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 604 | **/ |
| 605 | |
| 606 | /* FIXME: (ATL) utmp_write_direct needs testing */ |
| 607 | |
| 608 | #ifdef USE_UTMP |
| 609 | |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 610 | /* if we can, use pututline() etc. */ |
| 611 | #if !defined(DISABLE_PUTUTLINE) && defined(HAVE_SETUTENT) && \ |
| 612 | defined(HAVE_PUTUTLINE) |
| 613 | # define UTMP_USE_LIBRARY |
| 614 | #endif |
| 615 | |
| 616 | |
| 617 | /* write a utmp entry with the system's help (pututline() and pals) */ |
| 618 | #ifdef UTMP_USE_LIBRARY |
| 619 | static int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 620 | utmp_write_library(struct logininfo *li, struct utmp *ut) |
| 621 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 622 | setutent(); |
| 623 | pututline(ut); |
| 624 | |
| 625 | #ifdef HAVE_ENDUTENT |
| 626 | endutent(); |
| 627 | #endif |
| 628 | return 1; |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 629 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 630 | |
| 631 | #else |
| 632 | |
| 633 | /* write a utmp entry direct to the file */ |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 634 | /* This is a slightly modification of code in OpenBSD's login.c */ |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 635 | static int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 636 | utmp_write_direct(struct logininfo *li, struct utmp *ut) |
| 637 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 638 | struct utmp old_ut; |
| 639 | register int fd; |
| 640 | int tty; |
| 641 | |
| 642 | tty = ttyslot(); /* seems only to work for /dev/ttyp? style names */ |
| 643 | |
| 644 | if (tty > 0 && (fd = open(UTMP_FILE, O_RDWR|O_CREAT, 0644)) >= 0) { |
| 645 | (void)lseek(fd, (off_t)(tty * sizeof(struct utmp)), SEEK_SET); |
| 646 | /* |
| 647 | * Prevent luser from zero'ing out ut_host. |
| 648 | * If the new ut_line is empty but the old one is not |
| 649 | * and ut_line and ut_name match, preserve the old ut_line. |
| 650 | */ |
| 651 | if ( read(fd, &old_ut, sizeof(struct utmp)) == sizeof(struct utmp) |
| 652 | && ut->ut_host[0] == '\0' |
| 653 | && old_ut.ut_host[0] != '\0' |
| 654 | && strncmp(old_ut.ut_line, ut->ut_line, sizeof(ut->ut_line)) == 0 |
| 655 | && strncmp(old_ut.ut_name, ut->ut_name, sizeof(ut->ut_name)) == 0 ) |
| 656 | (void)memcpy(ut->ut_host, old_ut.ut_host, sizeof(ut->ut_host)); |
| 657 | |
| 658 | (void)lseek(fd, (off_t)(tty * sizeof(struct utmp)), SEEK_SET); |
| 659 | if (write(fd, ut, sizeof(struct utmp))==-1) |
| 660 | log("utmp_write_direct: error writing %s: %s", |
| 661 | UTMP_FILE, strerror(errno)); |
| 662 | |
| 663 | (void)close(fd); |
| 664 | return 1; |
| 665 | } else |
| 666 | return 0; |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 667 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 668 | #endif /* UTMP_USE_LIBRARY */ |
| 669 | |
| 670 | |
| 671 | static int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 672 | utmp_perform_login(struct logininfo *li) |
| 673 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 674 | struct utmp ut; |
| 675 | |
| 676 | construct_utmp(li, &ut); |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 677 | #ifdef UTMP_USE_LIBRARY |
| 678 | if (!utmp_write_library(li, &ut)) { |
| 679 | log("utmp_perform_login: utmp_write_library() failed"); |
| 680 | return 0; |
| 681 | } |
| 682 | #else |
| 683 | if (!utmp_write_direct(li, &ut)) { |
| 684 | log("utmp_perform_login: utmp_write_direct() failed"); |
| 685 | return 0; |
| 686 | } |
| 687 | #endif |
| 688 | return 1; |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 689 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 690 | |
| 691 | |
| 692 | static int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 693 | utmp_perform_logout(struct logininfo *li) |
| 694 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 695 | struct utmp ut; |
| 696 | |
| 697 | memset(&ut, '\0', sizeof(ut)); |
| 698 | set_utmp_time(li, &ut); |
| 699 | line_stripname(ut.ut_line, li->line, sizeof(ut.ut_line)); |
| 700 | #ifdef HAVE_ID_IN_UTMP |
| 701 | line_abbrevname(ut.ut_id, li->line, sizeof(ut.ut_id)); |
| 702 | #endif |
| 703 | #ifdef HAVE_TYPE_IN_UTMP |
| 704 | ut.ut_type = DEAD_PROCESS; |
| 705 | #endif |
| 706 | |
| 707 | #if !defined(DISABLE_PUTUTLINE) \ |
| 708 | && defined(HAVE_SETUTENT) && defined(HAVE_PUTUTLINE) |
| 709 | utmp_write_library(li, &ut); |
| 710 | #else |
| 711 | utmp_write_direct(li, &ut); |
| 712 | #endif |
| 713 | |
| 714 | return 1; |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 715 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 716 | |
| 717 | |
| 718 | int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 719 | utmp_write_entry(struct logininfo *li) |
| 720 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 721 | switch(li->type) { |
| 722 | case LTYPE_LOGIN: |
| 723 | return utmp_perform_login(li); |
| 724 | |
| 725 | case LTYPE_LOGOUT: |
| 726 | return utmp_perform_logout(li); |
| 727 | |
| 728 | default: |
| 729 | log("utmp_write_entry: invalid type field"); |
| 730 | return 0; |
| 731 | } |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 732 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 733 | |
| 734 | |
| 735 | #endif |
| 736 | /* USE_UTMP */ |
| 737 | |
| 738 | |
| 739 | /** |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 740 | ** Low-level utmpx functions |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 741 | **/ |
| 742 | |
| 743 | /* not much point if we don't want utmpx entries */ |
| 744 | #ifdef USE_UTMPX |
| 745 | |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 746 | /* if we have the wherewithall, use pututxline etc. */ |
| 747 | #if !defined(DISABLE_PUTUTXLINE) && defined(HAVE_SETUTXENT) \ |
| 748 | && defined(HAVE_PUTUTXLINE) |
| 749 | # define UTMPX_USE_LIBRARY |
| 750 | #endif |
| 751 | |
| 752 | |
| 753 | /* write a utmpx entry with the system's help (pututxline() and pals) */ |
| 754 | #ifdef UTMPX_USE_LIBRARY |
| 755 | static int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 756 | utmpx_write_library(struct logininfo *li, struct utmpx *utx) |
| 757 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 758 | setutxent(); |
| 759 | pututxline(utx); |
| 760 | |
| 761 | #ifdef HAVE_ENDUTXENT |
| 762 | endutxent(); |
| 763 | #endif |
| 764 | return 1; |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 765 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 766 | |
| 767 | #else |
| 768 | /* UTMPX_USE_LIBRARY */ |
| 769 | |
| 770 | |
| 771 | /* write a utmp entry direct to the file */ |
| 772 | static int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 773 | utmpx_write_direct(struct logininfo *li, struct utmpx *utx) |
| 774 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 775 | log("utmpx_write_direct: not implemented!"); |
| 776 | return 0; |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 777 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 778 | |
| 779 | #endif |
| 780 | /* UTMPX_USE_LIBRARY */ |
| 781 | |
| 782 | static int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 783 | utmpx_perform_login(struct logininfo *li) |
| 784 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 785 | struct utmpx utx; |
| 786 | |
| 787 | construct_utmpx(li, &utx); |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 788 | #ifdef UTMPX_USE_LIBRARY |
| 789 | if (!utmpx_write_library(li, &utx)) { |
| 790 | log("utmpx_perform_login: utmp_write_library() failed"); |
| 791 | return 0; |
| 792 | } |
| 793 | #else |
| 794 | if (!utmpx_write_direct(li, &ut)) { |
| 795 | log("utmpx_perform_login: utmp_write_direct() failed"); |
| 796 | return 0; |
| 797 | } |
| 798 | #endif |
| 799 | return 1; |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 800 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 801 | |
| 802 | |
| 803 | static int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 804 | utmpx_perform_logout(struct logininfo *li) |
| 805 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 806 | struct utmpx utx; |
| 807 | |
| 808 | memset(&utx, '\0', sizeof(utx)); |
| 809 | set_utmpx_time(li, &utx); |
| 810 | line_stripname(utx.ut_line, li->line, sizeof(utx.ut_line)); |
| 811 | #ifdef HAVE_ID_IN_UTMPX |
| 812 | line_abbrevname(utx.ut_id, li->line, sizeof(utx.ut_id)); |
| 813 | #endif |
| 814 | #ifdef HAVE_TYPE_IN_UTMPX |
| 815 | utx.ut_type = DEAD_PROCESS; |
| 816 | #endif |
| 817 | |
| 818 | #ifdef UTMPX_USE_LIBRARY |
| 819 | utmpx_write_library(li, &utx); |
| 820 | #else |
| 821 | utmpx_write_direct(li, &utx); |
| 822 | #endif |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 823 | return 1; |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 824 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 825 | |
| 826 | |
| 827 | int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 828 | utmpx_write_entry(struct logininfo *li) |
| 829 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 830 | switch(li->type) { |
| 831 | case LTYPE_LOGIN: |
| 832 | return utmpx_perform_login(li); |
| 833 | case LTYPE_LOGOUT: |
| 834 | return utmpx_perform_logout(li); |
| 835 | default: |
| 836 | log("utmpx_write_entry: invalid type field"); |
| 837 | return 0; |
| 838 | } |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 839 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 840 | |
| 841 | |
| 842 | #endif |
| 843 | /* USE_UTMPX */ |
| 844 | |
| 845 | |
| 846 | /** |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 847 | ** Low-level wtmp functions |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 848 | **/ |
| 849 | |
| 850 | #ifdef USE_WTMP |
| 851 | |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 852 | /* write a wtmp entry direct to the end of the file */ |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 853 | /* This is a slight modification of code in OpenBSD's logwtmp.c */ |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 854 | static int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 855 | wtmp_write(struct logininfo *li, struct utmp *ut) |
| 856 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 857 | struct stat buf; |
| 858 | int fd, ret = 1; |
| 859 | |
| 860 | if ((fd = open(WTMP_FILE, O_WRONLY|O_APPEND, 0)) < 0) { |
| 861 | log("wtmp_write: problem writing %s: %s", |
| 862 | WTMP_FILE, strerror(errno)); |
| 863 | return 0; |
| 864 | } |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 865 | if (fstat(fd, &buf) == 0) |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 866 | if (write(fd, (char *)ut, sizeof(struct utmp)) != |
| 867 | sizeof(struct utmp)) { |
| 868 | ftruncate(fd, buf.st_size); |
| 869 | log("wtmp_write: problem writing %s: %s", |
| 870 | WTMP_FILE, strerror(errno)); |
| 871 | ret = 0; |
| 872 | } |
| 873 | (void)close(fd); |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 874 | return ret; |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 875 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 876 | |
| 877 | |
| 878 | static int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 879 | wtmp_perform_login(struct logininfo *li){ |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 880 | struct utmp ut; |
| 881 | |
| 882 | construct_utmp(li, &ut); |
| 883 | return wtmp_write(li, &ut); |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 884 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 885 | |
| 886 | |
| 887 | static int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 888 | wtmp_perform_logout(struct logininfo *li) |
| 889 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 890 | struct utmp ut; |
| 891 | |
| 892 | construct_utmp(li, &ut); |
| 893 | /* blank out unnecessary fields */ |
| 894 | memset(&(ut.ut_name), '\0', sizeof(ut.ut_name)); |
| 895 | #ifdef HAVE_ID_IN_UTMP |
| 896 | memset(&(ut.ut_id), '\0', sizeof(ut.ut_id)); |
| 897 | #endif |
| 898 | #ifdef HAVE_HOST_IN_UTMP |
| 899 | memset(&(ut.ut_host), '\0', sizeof(ut.ut_host)); |
| 900 | #endif |
| 901 | #ifdef HAVE_ADDR_IN_UTMP |
| 902 | memset(&(ut.ut_addr), '\0', sizeof(ut.ut_addr)); |
| 903 | #endif |
| 904 | return wtmp_write(li, &ut); |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 905 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 906 | |
| 907 | |
| 908 | int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 909 | wtmp_write_entry(struct logininfo *li) |
| 910 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 911 | switch(li->type) { |
| 912 | case LTYPE_LOGIN: |
| 913 | return wtmp_perform_login(li); |
| 914 | case LTYPE_LOGOUT: |
| 915 | return wtmp_perform_logout(li); |
| 916 | default: |
| 917 | log("wtmp_write_entry: invalid type field"); |
| 918 | return 0; |
| 919 | } |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 920 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 921 | |
| 922 | |
| 923 | int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 924 | wtmp_get_entry(struct logininfo *li) |
| 925 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 926 | struct stat st; |
| 927 | struct utmp ut; |
| 928 | int fd; |
| 929 | |
| 930 | if ((fd = open(WTMP_FILE, O_RDONLY)) < 0) { |
| 931 | log("wtmp_get_entry: problem opening %s: %s", |
| 932 | WTMP_FILE, strerror(errno)); |
| 933 | return 0; |
| 934 | } |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 935 | if (fstat(fd, &st) != 0) { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 936 | log("wtmp_get_entry: couldn't stat %s: %s", |
| 937 | WTMP_FILE, strerror(errno)); |
| 938 | close(fd); |
| 939 | return 0; |
| 940 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 941 | (void)lseek(fd, (off_t)(0-sizeof(struct utmp)), SEEK_END); |
| 942 | |
| 943 | do { |
| 944 | if (read(fd, &ut, sizeof(ut)) != sizeof(ut)) { |
| 945 | log("wtmp_get_entry: read of %s failed: %s", |
| 946 | WTMP_FILE, strerror(errno)); |
| 947 | close (fd); |
| 948 | return 0; |
| 949 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 950 | /* Logouts are recorded as a blank username on a particular line. |
| 951 | * So, we just need to find the username in struct utmp */ |
| 952 | if ( strncmp(li->username, ut.ut_user, 8) == 0 ) { |
| 953 | /* note we've already made sure there's a time in struct utmp */ |
| 954 | #ifdef HAVE_TIME_IN_UTMP |
| 955 | li->tv_sec = ut.ut_time; |
| 956 | #else |
| 957 | # if HAVE_TV_IN_UTMP |
| 958 | li->tv_sec = ut.ut_tv.tv_sec; |
| 959 | # endif |
| 960 | #endif |
| 961 | line_fullname(li->line, ut.ut_line, sizeof(ut.ut_line)); |
| 962 | #ifdef HAVE_HOST_IN_UTMP |
| 963 | strlcpy(li->hostname, ut.ut_host, sizeof(ut.ut_host)); |
| 964 | #endif |
| 965 | } |
| 966 | if (lseek(fd, (off_t)(0-2*sizeof(struct utmp)), SEEK_CUR) == -1) { |
| 967 | close (fd); |
| 968 | return 0; |
| 969 | } |
| 970 | } while (li->tv_sec == 0); |
| 971 | |
| 972 | return 1; |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 973 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 974 | |
| 975 | |
| 976 | #endif |
| 977 | /* USE_WTMP */ |
| 978 | |
| 979 | |
| 980 | /** |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 981 | ** Low-level wtmpx functions |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 982 | **/ |
| 983 | |
| 984 | #ifdef USE_WTMPX |
| 985 | |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 986 | /* write a wtmpx entry direct to the end of the file */ |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 987 | /* This is a slight modification of code in OpenBSD's logwtmp.c */ |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 988 | static int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 989 | wtmpx_write(struct logininfo *li, struct utmpx *utx) |
| 990 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 991 | struct stat buf; |
| 992 | int fd, ret = 1; |
| 993 | |
| 994 | if ((fd = open(WTMPX_FILE, O_WRONLY|O_APPEND, 0)) < 0) { |
| 995 | log("wtmpx_write: problem opening %s: %s", |
| 996 | WTMPX_FILE, strerror(errno)); |
| 997 | return 0; |
| 998 | } |
| 999 | |
| 1000 | if (fstat(fd, &buf) == 0) |
| 1001 | if (write(fd, (char *)utx, sizeof(struct utmpx)) != |
| 1002 | sizeof(struct utmpx)) { |
| 1003 | ftruncate(fd, buf.st_size); |
| 1004 | log("wtmpx_write: problem writing %s: %s", |
| 1005 | WTMPX_FILE, strerror(errno)); |
| 1006 | ret = 0; |
| 1007 | } |
| 1008 | (void)close(fd); |
| 1009 | |
| 1010 | return ret; |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1011 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1012 | |
| 1013 | |
| 1014 | static int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1015 | wtmpx_perform_login(struct logininfo *li) |
| 1016 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1017 | struct utmpx utx; |
| 1018 | |
| 1019 | construct_utmpx(li, &utx); |
| 1020 | return wtmpx_write(li, &utx); |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1021 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1022 | |
| 1023 | |
| 1024 | static int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1025 | wtmpx_perform_logout(struct logininfo *li) |
| 1026 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1027 | struct utmpx utx; |
| 1028 | |
| 1029 | construct_utmpx(li, &utx); |
| 1030 | /* blank out unnecessary fields */ |
| 1031 | memset(&(utx.ut_name), '\0', sizeof(utx.ut_name)); |
| 1032 | #ifdef HAVE_ID_IN_UTMPX |
| 1033 | memset(&(utx.ut_id), '\0', sizeof(utx.ut_id)); |
| 1034 | #endif |
| 1035 | #ifdef HAVE_HOST_IN_UTMPX |
| 1036 | memset(&(utx.ut_host), '\0', sizeof(utx.ut_host)); |
| 1037 | #endif |
| 1038 | #ifdef HAVE_ADDR_IN_UTMPX |
| 1039 | memset(&(utx.ut_addr), '\0', sizeof(utx.ut_addr)); |
| 1040 | #endif |
| 1041 | return wtmpx_write(li, &utx); |
| 1042 | |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1043 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1044 | |
| 1045 | |
| 1046 | int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1047 | wtmpx_write_entry(struct logininfo *li) |
| 1048 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1049 | switch(li->type) { |
| 1050 | case LTYPE_LOGIN: |
| 1051 | return wtmpx_perform_login(li); |
| 1052 | case LTYPE_LOGOUT: |
| 1053 | return wtmpx_perform_logout(li); |
| 1054 | default: |
| 1055 | log("wtmpx_write_entry: invalid type field"); |
| 1056 | return 0; |
| 1057 | } |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1058 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1059 | |
| 1060 | |
| 1061 | int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1062 | wtmpx_get_entry(struct logininfo *li) |
| 1063 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1064 | struct stat st; |
| 1065 | struct utmpx utx; |
| 1066 | int fd; |
| 1067 | |
| 1068 | if ((fd = open(WTMPX_FILE, O_RDONLY)) < 0) { |
| 1069 | log("wtmpx_get_entry: problem opening %s: %s", |
| 1070 | WTMPX_FILE, strerror(errno)); |
| 1071 | return 0; |
| 1072 | } |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1073 | if (fstat(fd, &st) != 0) { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1074 | log("wtmpx_get_entry: couldn't stat %s: %s", |
| 1075 | WTMP_FILE, strerror(errno)); |
| 1076 | close(fd); |
| 1077 | return 0; |
| 1078 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1079 | (void)lseek(fd, (off_t)(0-sizeof(struct utmpx)), SEEK_END); |
| 1080 | |
| 1081 | do { |
| 1082 | if (read(fd, &utx, sizeof(utx)) != sizeof(utx)) { |
| 1083 | log("wtmpx_get_entry: read of %s failed: %s", |
| 1084 | WTMPX_FILE, strerror(errno)); |
| 1085 | close (fd); |
| 1086 | return 0; |
| 1087 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1088 | /* Logouts are recorded as a blank username on a particular line. |
| 1089 | * So, we just need to find the username in struct utmpx */ |
| 1090 | if ( strncmp(li->username, utx.ut_user, 8) == 0 ) { |
| 1091 | /* note we've already made sure there's a time in struct utmp */ |
| 1092 | #ifdef HAVE_TV_IN_UTMPX |
| 1093 | li->tv_sec = utx.ut_tv.tv_sec; |
| 1094 | #else |
| 1095 | # ifdef HAVE_TIME_IN_UTMPX |
| 1096 | li->tv_sec = utx.ut_time; |
| 1097 | # endif |
| 1098 | #endif |
| 1099 | line_fullname(li->line, utx.ut_line, sizeof(utx.ut_line)); |
| 1100 | #ifdef HAVE_HOST_IN_UTMPX |
| 1101 | strlcpy(li->hostname, utx.ut_host, sizeof(utx.ut_line)); |
| 1102 | #endif |
| 1103 | } |
| 1104 | if (lseek(fd, (off_t)(0-2*sizeof(struct utmpx)), SEEK_CUR) == -1) { |
| 1105 | close (fd); |
| 1106 | return 0; |
| 1107 | } |
| 1108 | } while (li->tv_sec == 0); |
| 1109 | return 1; |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1110 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1111 | |
| 1112 | |
Damien Miller | d5bf307 | 2000-06-07 21:32:13 +1000 | [diff] [blame] | 1113 | #endif /* USE_WTMPX */ |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1114 | |
| 1115 | |
| 1116 | /** |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1117 | ** Low-level libutil login() functions |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1118 | **/ |
| 1119 | |
| 1120 | #ifdef USE_LOGIN |
| 1121 | |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1122 | static int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1123 | syslogin_perform_login(struct logininfo *li) |
| 1124 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1125 | struct utmp *ut; |
| 1126 | |
| 1127 | if (! (ut = (struct utmp *)malloc(sizeof(struct utmp)))) { |
| 1128 | log("syslogin_perform_login: couldn't malloc()"); |
| 1129 | return 0; |
| 1130 | } |
| 1131 | construct_utmp(li, ut); |
| 1132 | login(ut); |
| 1133 | |
| 1134 | return 1; |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1135 | } |
| 1136 | |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1137 | |
| 1138 | static int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1139 | syslogin_perform_logout(struct logininfo *li) |
| 1140 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1141 | #ifdef HAVE_LOGOUT |
| 1142 | char line[8]; |
| 1143 | |
| 1144 | (void)line_stripname(line, li->line, sizeof(line)); |
| 1145 | |
| 1146 | if (!logout(line)) { |
| 1147 | log("syslogin_perform_logout: logout() returned an error"); |
Damien Miller | d5bf307 | 2000-06-07 21:32:13 +1000 | [diff] [blame] | 1148 | # ifdef HAVE_LOGWTMP |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1149 | } else { |
| 1150 | logwtmp(line, "", ""); |
| 1151 | } |
Damien Miller | d5bf307 | 2000-06-07 21:32:13 +1000 | [diff] [blame] | 1152 | # endif |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1153 | /* TODO: what to do if we have login, but no logout? |
| 1154 | * what if logout but no logwtmp? All routines are in libutil |
| 1155 | * so they should all be there, but... */ |
| 1156 | #endif |
| 1157 | return 1; |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1158 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1159 | |
| 1160 | |
| 1161 | int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1162 | syslogin_write_entry(struct logininfo *li) |
| 1163 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1164 | switch (li->type) { |
| 1165 | case LTYPE_LOGIN: |
| 1166 | return syslogin_perform_login(li); |
| 1167 | case LTYPE_LOGOUT: |
| 1168 | return syslogin_perform_logout(li); |
| 1169 | default: |
| 1170 | log("syslogin_write_entry: Invalid type field"); |
| 1171 | return 0; |
| 1172 | } |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1173 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1174 | |
| 1175 | |
Damien Miller | d5bf307 | 2000-06-07 21:32:13 +1000 | [diff] [blame] | 1176 | #endif /* USE_LOGIN */ |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1177 | |
| 1178 | /* end of file log-syslogin.c */ |
| 1179 | |
| 1180 | |
| 1181 | /** |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1182 | ** Low-level lastlog functions |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1183 | **/ |
| 1184 | |
| 1185 | #ifdef USE_LASTLOG |
| 1186 | |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1187 | static void |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1188 | lastlog_construct(struct logininfo *li, struct lastlog *last) |
| 1189 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1190 | /* clear the structure */ |
| 1191 | memset(last, '\0', sizeof(struct lastlog)); |
| 1192 | |
| 1193 | (void)line_stripname(last->ll_line, li->line, |
| 1194 | sizeof(last->ll_line)); |
| 1195 | strlcpy(last->ll_host, li->hostname, sizeof(last->ll_host)); |
| 1196 | last->ll_time = li->tv_sec; |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1197 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1198 | |
| 1199 | |
| 1200 | #define LL_FILE 1 |
| 1201 | #define LL_DIR 2 |
| 1202 | #define LL_OTHER 3 |
| 1203 | |
| 1204 | static int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1205 | lastlog_filetype(char *filename) |
| 1206 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1207 | struct stat st; |
| 1208 | |
| 1209 | if ( stat(LASTLOG_FILE, &st) != 0) { |
| 1210 | log("lastlog_perform_login: Couldn't stat %s: %s", |
| 1211 | LASTLOG_FILE, strerror(errno)); |
| 1212 | return 0; |
| 1213 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1214 | if (S_ISDIR(st.st_mode)) |
| 1215 | return LL_DIR; |
| 1216 | else if (S_ISREG(st.st_mode)) |
| 1217 | return LL_FILE; |
| 1218 | else |
| 1219 | return LL_OTHER; |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1220 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1221 | |
| 1222 | |
| 1223 | /* open the file (using filemode) and seek to the login entry */ |
| 1224 | static int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1225 | lastlog_openseek(struct logininfo *li, int *fd, int filemode) |
| 1226 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1227 | off_t offset; |
| 1228 | int type; |
| 1229 | char lastlog_file[1024]; |
| 1230 | |
| 1231 | type = lastlog_filetype(LASTLOG_FILE); |
| 1232 | switch (type) { |
| 1233 | case LL_FILE: |
| 1234 | strlcpy(lastlog_file, LASTLOG_FILE, sizeof(lastlog_file)); |
| 1235 | break; |
| 1236 | case LL_DIR: |
| 1237 | snprintf(lastlog_file, sizeof(lastlog_file), "%s/%s", |
| 1238 | LASTLOG_FILE, li->username); |
| 1239 | break; |
| 1240 | default: |
| 1241 | log("lastlog_openseek: %.100s is not a file or directory!", |
| 1242 | LASTLOG_FILE); |
| 1243 | return 0; |
| 1244 | } /* switch */ |
| 1245 | |
| 1246 | *fd = open(lastlog_file, filemode); |
| 1247 | if ( *fd < 0) { |
| 1248 | log("lastlog_openseek: Couldn't open %s: %s", |
| 1249 | lastlog_file, strerror(errno)); |
| 1250 | return 0; |
| 1251 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1252 | /* find this uid's offset in the lastlog file */ |
| 1253 | offset = (off_t) ( (long)li->uid * sizeof(struct lastlog)); |
| 1254 | |
| 1255 | if ( lseek(*fd, offset, SEEK_SET) != offset ) { |
| 1256 | log("lastlog_openseek: %s->lseek(): %s", |
| 1257 | lastlog_file, strerror(errno)); |
| 1258 | return 0; |
| 1259 | } |
| 1260 | return 1; |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1261 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1262 | |
| 1263 | static int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1264 | lastlog_perform_login(struct logininfo *li) |
| 1265 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1266 | struct lastlog last; |
| 1267 | int fd; |
| 1268 | |
| 1269 | /* create our struct lastlog */ |
| 1270 | lastlog_construct(li, &last); |
| 1271 | |
| 1272 | /* write the entry */ |
| 1273 | if (lastlog_openseek(li, &fd, O_RDWR)) { |
| 1274 | if ( write(fd, &last, sizeof(struct lastlog)) |
| 1275 | != sizeof(struct lastlog) ) { |
| 1276 | log("lastlog_write_filemode: Error writing to %s: %s", |
| 1277 | LASTLOG_FILE, strerror(errno)); |
| 1278 | return 0; |
| 1279 | } |
| 1280 | return 1; |
| 1281 | } else |
| 1282 | return 0; |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1283 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1284 | |
| 1285 | |
| 1286 | int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1287 | lastlog_write_entry(struct logininfo *li) |
| 1288 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1289 | switch(li->type) { |
| 1290 | case LTYPE_LOGIN: |
| 1291 | return lastlog_perform_login(li); |
| 1292 | default: |
| 1293 | log("lastlog_write_entry: Invalid type field"); |
| 1294 | return 0; |
| 1295 | } |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1296 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1297 | |
| 1298 | |
| 1299 | static void |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1300 | lastlog_populate_entry(struct logininfo *li, struct lastlog *last) |
| 1301 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1302 | line_fullname(li->line, last->ll_line, sizeof(li->line)); |
| 1303 | strlcpy(li->hostname, last->ll_host, sizeof(li->hostname)); |
| 1304 | li->tv_sec = last->ll_time; |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1305 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1306 | |
| 1307 | |
| 1308 | int |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1309 | lastlog_get_entry(struct logininfo *li) |
| 1310 | { |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1311 | struct lastlog last; |
| 1312 | int fd; |
| 1313 | |
| 1314 | if (lastlog_openseek(li, &fd, O_RDONLY)) { |
| 1315 | if ( read(fd, &last, sizeof(struct lastlog)) |
| 1316 | != sizeof(struct lastlog) ) { |
| 1317 | log("lastlog_write_filemode: Error reading from %s: %s", |
| 1318 | LASTLOG_FILE, strerror(errno)); |
| 1319 | return 0; |
| 1320 | } else { |
| 1321 | lastlog_populate_entry(li, &last); |
| 1322 | return 1; |
| 1323 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1324 | } else |
| 1325 | return 0; |
andre | 61e6725 | 2000-06-04 17:07:49 +0000 | [diff] [blame] | 1326 | } |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1327 | |
| 1328 | |
Damien Miller | d5bf307 | 2000-06-07 21:32:13 +1000 | [diff] [blame] | 1329 | #endif /* USE_LASTLOG */ |