1 |
/*--------------------------------*-C-*---------------------------------* |
2 |
* File: logging.C |
3 |
*----------------------------------------------------------------------* |
4 |
* |
5 |
* All portions of code are copyright by their respective author/s. |
6 |
* Copyright (c) 1992 John Bovey <jdb@ukc.ac.uk> |
7 |
* - original version |
8 |
* Copyright (c) 1993 lipka |
9 |
* Copyright (c) 1993 Brian Stempien <stempien@cs.wmich.edu> |
10 |
* Copyright (c) 1995 Raul Garcia Garcia <rgg@tid.es> |
11 |
* Copyright (c) 1995 Piet W. Plomp <piet@idefix.icce.rug.nl> |
12 |
* Copyright (c) 1997 Raul Garcia Garcia <rgg@tid.es> |
13 |
* Copyright (c) 1998-2001 Geoff Wing <gcw@pobox.com> |
14 |
* - extensive modifications |
15 |
* Copyright (c) 1999 D J Hawkey Jr <hawkeyd@visi.com> |
16 |
* - lastlog support |
17 |
* Copyright (c) 2004 Marc Lehmann <pcg@goof.com> |
18 |
* |
19 |
* This program is free software; you can redistribute it and/or modify |
20 |
* it under the terms of the GNU General Public License as published by |
21 |
* the Free Software Foundation; either version 2 of the License, or |
22 |
* (at your option) any later version. |
23 |
* |
24 |
* This program is distributed in the hope that it will be useful, |
25 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
26 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
27 |
* GNU General Public License for more details. |
28 |
* |
29 |
* You should have received a copy of the GNU General Public License |
30 |
* along with this program; if not, write to the Free Software |
31 |
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
32 |
*----------------------------------------------------------------------*/ |
33 |
/*----------------------------------------------------------------------* |
34 |
* Public: |
35 |
* extern void cleanutent (void); |
36 |
* extern void makeutent (const char * pty, const char * hostname); |
37 |
* |
38 |
* Private: |
39 |
* rxvt_update_wtmp (); |
40 |
*----------------------------------------------------------------------*/ |
41 |
|
42 |
#include "../config.h" /* NECESSARY */ |
43 |
#include "rxvt.h" /* NECESSARY */ |
44 |
#include "logging.h" |
45 |
#ifdef UTMP_SUPPORT |
46 |
|
47 |
#if HAVE_STRUCT_UTMP |
48 |
int rxvt_write_bsd_utmp (int utmp_pos, struct utmp *wu); |
49 |
void rxvt_update_wtmp (const char *fname, const struct utmp *putmp); |
50 |
#endif |
51 |
|
52 |
void rxvt_update_lastlog (const char *fname, const char *pty, const char *host); |
53 |
|
54 |
/* |
55 |
* BSD style utmp entry |
56 |
* ut_line, ut_name, ut_host, ut_time |
57 |
* SYSV style utmp (and utmpx) entry |
58 |
* ut_user, ut_id, ut_line, ut_pid, ut_type, ut_exit, ut_time |
59 |
*/ |
60 |
|
61 |
/* ------------------------------------------------------------------------- */ |
62 |
|
63 |
/* |
64 |
* make and write utmp and wtmp entries |
65 |
*/ |
66 |
void |
67 |
rxvt_term::makeutent (const char *pty, const char *hostname) |
68 |
{ |
69 |
#ifdef HAVE_STRUCT_UTMP |
70 |
struct utmp *ut = &this->ut; |
71 |
#endif |
72 |
#ifdef HAVE_STRUCT_UTMPX |
73 |
struct utmpx *utx = &this->utx; |
74 |
#endif |
75 |
#ifdef HAVE_UTMP_PID |
76 |
int i; |
77 |
#endif |
78 |
struct passwd *pwent = getpwuid (getuid ()); |
79 |
|
80 |
if (!strncmp (pty, "/dev/", 5)) |
81 |
pty += 5; /* skip /dev/ prefix */ |
82 |
|
83 |
#ifdef HAVE_UTMP_PID |
84 |
if (!strncmp (pty, "pty", 3) || !strncmp (pty, "tty", 3)) |
85 |
strncpy (ut_id, pty + 3, sizeof (ut_id)); |
86 |
else if (sscanf (pty, "pts/%d", &i) == 1) |
87 |
sprintf (ut_id, "vt%02x", (i & 0xff)); /* sysv naming */ |
88 |
else if (strncmp (pty, "pty", 3) && strncmp (pty, "tty", 3)) |
89 |
{ |
90 |
rxvt_warn ("can't parse tty name \"%s\", not adding utmp entry.\n", pty); |
91 |
return; |
92 |
} |
93 |
#endif |
94 |
|
95 |
#ifdef HAVE_STRUCT_UTMP |
96 |
memset (ut, 0, sizeof (struct utmp)); |
97 |
# ifdef HAVE_UTMP_PID |
98 |
setutent (); |
99 |
strncpy (ut->ut_id, ut_id, sizeof (ut->ut_id)); |
100 |
ut->ut_type = DEAD_PROCESS; |
101 |
getutid (ut); /* position to entry in utmp file */ |
102 |
strncpy (ut_id, ut_id, sizeof (ut_id)); |
103 |
# endif |
104 |
#endif |
105 |
|
106 |
#ifdef HAVE_STRUCT_UTMPX |
107 |
memset (utx, 0, sizeof (struct utmpx)); |
108 |
setutxent (); |
109 |
strncpy (utx->ut_id, ut_id, sizeof (utx->ut_id)); |
110 |
utx->ut_type = DEAD_PROCESS; |
111 |
getutxid (utx); /* position to entry in utmp file */ |
112 |
strncpy (ut_id, ut_id, sizeof (ut_id)); |
113 |
#endif |
114 |
|
115 |
#ifdef HAVE_STRUCT_UTMP |
116 |
strncpy (ut->ut_line, pty, sizeof (ut->ut_line)); |
117 |
ut->ut_time = time (NULL); |
118 |
# ifdef HAVE_UTMP_PID |
119 |
strncpy (ut->ut_user, (pwent && pwent->pw_name) ? pwent->pw_name : "?", |
120 |
sizeof (ut->ut_user)); |
121 |
strncpy (ut->ut_id, ut_id, sizeof (ut->ut_id)); |
122 |
ut->ut_time = time (NULL); |
123 |
ut->ut_pid = cmd_pid; |
124 |
# ifdef HAVE_UTMP_HOST |
125 |
strncpy (ut->ut_host, hostname, sizeof (ut->ut_host)); |
126 |
# endif |
127 |
ut->ut_type = USER_PROCESS; |
128 |
pututline (ut); |
129 |
endutent (); /* close the file */ |
130 |
utmp_pos = 0; |
131 |
# else |
132 |
strncpy (ut->ut_name, (pwent && pwent->pw_name) ? pwent->pw_name : "?", |
133 |
sizeof (ut->ut_name)); |
134 |
# ifdef HAVE_UTMP_HOST |
135 |
strncpy (ut->ut_host, hostname, sizeof (ut->ut_host)); |
136 |
# endif |
137 |
# endif |
138 |
#endif |
139 |
|
140 |
#ifdef HAVE_STRUCT_UTMPX |
141 |
strncpy (utx->ut_line, pty, sizeof (utx->ut_line)); |
142 |
strncpy (utx->ut_user, (pwent && pwent->pw_name) ? pwent->pw_name : "?", |
143 |
sizeof (utx->ut_user)); |
144 |
strncpy (utx->ut_id, ut_id, sizeof (utx->ut_id)); |
145 |
# if HAVE_UTMPX_SESSION |
146 |
utx->ut_session = getsid (0); |
147 |
# endif |
148 |
utx->ut_tv.tv_sec = time (NULL); |
149 |
utx->ut_tv.tv_usec = 0; |
150 |
utx->ut_pid = cmd_pid; |
151 |
# ifdef HAVE_UTMPX_HOST |
152 |
strncpy (utx->ut_host, hostname, sizeof (utx->ut_host)); |
153 |
# if 0 |
154 |
{ |
155 |
char *colon; |
156 |
|
157 |
if ((colon = strrchr (ut->ut_host, ':')) != NULL) |
158 |
*colon = '\0'; |
159 |
} |
160 |
# endif |
161 |
# endif |
162 |
utx->ut_type = USER_PROCESS; |
163 |
pututxline (utx); |
164 |
endutxent (); /* close the file */ |
165 |
utmp_pos = 0; |
166 |
#endif |
167 |
|
168 |
#if defined(HAVE_STRUCT_UTMP) && !defined(HAVE_UTMP_PID) |
169 |
|
170 |
{ |
171 |
int i; |
172 |
# ifdef HAVE_TTYSLOT |
173 |
i = ttyslot (); |
174 |
if (rxvt_write_bsd_utmp (i, ut)) |
175 |
utmp_pos = i; |
176 |
# else |
177 |
FILE *fd0; |
178 |
|
179 |
if ((fd0 = fopen (TTYTAB_FILENAME, "r")) != NULL) |
180 |
{ |
181 |
char buf[256], name[256]; |
182 |
|
183 |
buf[sizeof (buf) - 1] = '\0'; |
184 |
for (i = 1; (fgets (buf, sizeof (buf) - 1, fd0) != NULL);) |
185 |
{ |
186 |
if (*buf == '#' || sscanf (buf, "%s", name) != 1) |
187 |
continue; |
188 |
if (!strcmp (ut->ut_line, name)) |
189 |
{ |
190 |
if (!rxvt_write_bsd_utmp (i, ut)) |
191 |
i = 0; |
192 |
utmp_pos = i; |
193 |
fclose (fd0); |
194 |
break; |
195 |
} |
196 |
i++; |
197 |
} |
198 |
fclose (fd0); |
199 |
} |
200 |
# endif |
201 |
|
202 |
} |
203 |
#endif |
204 |
|
205 |
#ifdef WTMP_SUPPORT |
206 |
# ifdef WTMP_ONLY_ON_LOGIN |
207 |
if (OPTION (Opt_loginShell)) |
208 |
# endif |
209 |
{ |
210 |
# ifdef HAVE_STRUCT_UTMP |
211 |
# ifdef HAVE_UPDWTMP |
212 |
updwtmp (RXVT_WTMP_FILE, ut); |
213 |
# else |
214 |
rxvt_update_wtmp (RXVT_WTMP_FILE, ut); |
215 |
# endif |
216 |
# endif |
217 |
# ifdef HAVE_STRUCT_UTMPX |
218 |
# if HAVE_UPDWTMPX |
219 |
updwtmpx (RXVT_WTMPX_FILE, utx); |
220 |
# else |
221 |
pututxline (utx); |
222 |
# endif |
223 |
# endif |
224 |
} |
225 |
#endif |
226 |
#if defined(LASTLOG_SUPPORT) && defined(RXVT_LASTLOG_FILE) |
227 |
if (OPTION (Opt_loginShell)) |
228 |
rxvt_update_lastlog (RXVT_LASTLOG_FILE, pty, hostname); |
229 |
#endif |
230 |
} |
231 |
|
232 |
/* ------------------------------------------------------------------------- */ |
233 |
/* |
234 |
* remove utmp and wtmp entries |
235 |
*/ |
236 |
void |
237 |
rxvt_term::cleanutent () |
238 |
{ |
239 |
#ifdef HAVE_STRUCT_UTMP |
240 |
struct utmp *ut = &this->ut; |
241 |
#endif |
242 |
#ifdef HAVE_STRUCT_UTMPX |
243 |
struct utmpx *tmputx, *utx = &this->utx; |
244 |
#endif |
245 |
|
246 |
#ifdef HAVE_STRUCT_UTMP |
247 |
# ifdef HAVE_UTMP_PID |
248 |
memset (ut, 0, sizeof (struct utmp)); |
249 |
setutent (); |
250 |
strncpy (ut->ut_id, ut_id, sizeof (ut->ut_id)); |
251 |
ut->ut_type = USER_PROCESS; |
252 |
{ |
253 |
struct utmp *tmput = getutid (ut); |
254 |
|
255 |
if (tmput) /* position to entry in utmp file */ |
256 |
ut = tmput; |
257 |
} |
258 |
ut->ut_type = DEAD_PROCESS; |
259 |
# else |
260 |
memset (ut->ut_name, 0, sizeof (ut->ut_name)); |
261 |
# ifdef HAVE_UTMP_HOST |
262 |
memset (ut->ut_host, 0, sizeof (ut->ut_host)); |
263 |
# endif |
264 |
# endif |
265 |
ut->ut_time = time (NULL); |
266 |
#endif |
267 |
|
268 |
#ifdef HAVE_STRUCT_UTMPX |
269 |
memset (utx, 0, sizeof (struct utmpx)); |
270 |
setutxent (); |
271 |
strncpy (utx->ut_id, ut_id, sizeof (utx->ut_id)); |
272 |
utx->ut_type = USER_PROCESS; |
273 |
if ((tmputx = getutxid (utx))) /* position to entry in utmp file */ |
274 |
utx = tmputx; |
275 |
utx->ut_type = DEAD_PROCESS; |
276 |
# if HAVE_UTMPX_SESSION |
277 |
utx->ut_session = getsid (0); |
278 |
# endif |
279 |
utx->ut_tv.tv_sec = time (NULL); |
280 |
utx->ut_tv.tv_usec = 0; |
281 |
#endif |
282 |
|
283 |
/* |
284 |
* Write ending wtmp entry |
285 |
*/ |
286 |
#ifdef WTMP_SUPPORT |
287 |
# ifdef WTMP_ONLY_ON_LOGIN |
288 |
if (OPTION (Opt_loginShell)) |
289 |
# endif |
290 |
{ |
291 |
# ifdef HAVE_STRUCT_UTMP |
292 |
# ifdef HAVE_UPDWTMP |
293 |
updwtmp (RXVT_WTMP_FILE, ut); |
294 |
# else |
295 |
rxvt_update_wtmp (RXVT_WTMP_FILE, ut); |
296 |
# endif |
297 |
# endif |
298 |
# ifdef HAVE_STRUCT_UTMPX |
299 |
# if HAVE_UPDWTMPX |
300 |
updwtmpx (RXVT_WTMPX_FILE, utx); |
301 |
# else |
302 |
pututxline (utx); |
303 |
# endif |
304 |
# endif |
305 |
} |
306 |
#endif |
307 |
|
308 |
/* |
309 |
* Write utmp entry |
310 |
*/ |
311 |
#ifdef HAVE_STRUCT_UTMP |
312 |
# ifdef HAVE_UTMP_PID |
313 |
if (ut->ut_pid == cmd_pid) |
314 |
pututline (ut); |
315 |
endutent (); |
316 |
# else |
317 |
memset (ut, 0, sizeof (struct utmp)); |
318 |
rxvt_write_bsd_utmp (utmp_pos, ut); |
319 |
# endif |
320 |
#endif |
321 |
#ifdef HAVE_STRUCT_UTMPX |
322 |
if (utx->ut_pid == cmd_pid) |
323 |
pututxline (utx); |
324 |
endutxent (); |
325 |
#endif |
326 |
} |
327 |
|
328 |
/* ------------------------------------------------------------------------- */ |
329 |
/* |
330 |
* Write a BSD style utmp entry |
331 |
*/ |
332 |
#ifdef HAVE_UTMP_H |
333 |
int |
334 |
rxvt_write_bsd_utmp (int utmp_pos, struct utmp *wu) |
335 |
{ |
336 |
int fd; |
337 |
|
338 |
if (utmp_pos <= 0 || (fd = open (RXVT_UTMP_FILE, O_WRONLY)) == -1) |
339 |
return 0; |
340 |
|
341 |
if (lseek (fd, (off_t) (utmp_pos * sizeof (struct utmp)), SEEK_SET) != -1) |
342 |
write (fd, wu, sizeof (struct utmp)); |
343 |
close (fd); |
344 |
return 1; |
345 |
} |
346 |
#endif |
347 |
|
348 |
/* ------------------------------------------------------------------------- */ |
349 |
/* |
350 |
* Update a BSD style wtmp entry |
351 |
*/ |
352 |
#if defined(WTMP_SUPPORT) && !defined(HAVE_UPDWTMP) && defined(HAVE_STRUCT_UTMP) |
353 |
void |
354 |
rxvt_update_wtmp (const char *fname, const struct utmp *putmp) |
355 |
{ |
356 |
int fd, gotlock, retry; |
357 |
struct flock lck; /* fcntl locking scheme */ |
358 |
struct stat sbuf; |
359 |
|
360 |
if ((fd = open (fname, O_WRONLY | O_APPEND, 0)) < 0) |
361 |
return; |
362 |
|
363 |
lck.l_whence = SEEK_END; /* start lock at current eof */ |
364 |
lck.l_len = 0; /* end at ``largest possible eof'' */ |
365 |
lck.l_start = 0; |
366 |
lck.l_type = F_WRLCK; /* we want a write lock */ |
367 |
|
368 |
/* attempt lock with F_SETLK; F_SETLKW would cause a deadlock! */ |
369 |
for (retry = 10, gotlock = 0; retry--;) |
370 |
if (fcntl (fd, F_SETLK, &lck) != -1) |
371 |
{ |
372 |
gotlock = 1; |
373 |
break; |
374 |
} |
375 |
else if (errno != EAGAIN && errno != EACCES) |
376 |
break; |
377 |
if (!gotlock) |
378 |
{ /* give it up */ |
379 |
close (fd); |
380 |
return; |
381 |
} |
382 |
if (fstat (fd, &sbuf) == 0) |
383 |
if (write (fd, putmp, sizeof (struct utmp)) != sizeof (struct utmp)) |
384 |
ftruncate (fd, sbuf.st_size); /* remove bad writes */ |
385 |
|
386 |
lck.l_type = F_UNLCK; /* unlocking the file */ |
387 |
fcntl (fd, F_SETLK, &lck); |
388 |
close (fd); |
389 |
} |
390 |
#endif |
391 |
|
392 |
/* ------------------------------------------------------------------------- */ |
393 |
#ifdef LASTLOG_SUPPORT |
394 |
void |
395 |
rxvt_update_lastlog (const char *fname, const char *pty, const char *host) |
396 |
{ |
397 |
# ifdef HAVE_STRUCT_LASTLOGX |
398 |
struct lastlogx llx; |
399 |
# endif |
400 |
# ifdef HAVE_STRUCT_LASTLOG |
401 |
int fd; |
402 |
struct lastlog ll; |
403 |
# ifdef LASTLOG_IS_DIR |
404 |
char lastlogfile[256]; |
405 |
# endif |
406 |
struct passwd *pwent; |
407 |
# endif |
408 |
|
409 |
# ifdef HAVE_STRUCT_LASTLOGX |
410 |
memset (&llx, 0, sizeof (llx)); |
411 |
llx.ll_tv.tv_sec = time (NULL); |
412 |
llx.ll_tv.tv_usec = 0; |
413 |
strncpy (llx.ll_line, pty, sizeof (llx.ll_line)); |
414 |
strncpy (llx.ll_host, host, sizeof (llx.ll_host)); |
415 |
updlastlogx (RXVT_LASTLOGX_FILE, getuid (), &llx); |
416 |
# endif |
417 |
|
418 |
# ifdef HAVE_STRUCT_LASTLOG |
419 |
pwent = getpwuid (getuid ()); |
420 |
if (!pwent) |
421 |
{ |
422 |
rxvt_warn ("no entry in password file, not updating lastlog.\n"); |
423 |
return; |
424 |
} |
425 |
|
426 |
memset (&ll, 0, sizeof (ll)); |
427 |
ll.ll_time = time (NULL); |
428 |
strncpy (ll.ll_line, pty, sizeof (ll.ll_line)); |
429 |
strncpy (ll.ll_host, host, sizeof (ll.ll_host)); |
430 |
# ifdef LASTLOG_IS_DIR |
431 |
sprintf (lastlogfile, "%.*s/%.*s", |
432 |
sizeof (lastlogfile) - sizeof (pwent->pw_name) - 2, fname, |
433 |
sizeof (pwent->pw_name), |
434 |
(!pwent->pw_name || pwent->pw_name[0] == '\0') ? "unknown" |
435 |
: pwent->pw_name); |
436 |
if ((fd = open (lastlogfile, O_WRONLY | O_CREAT, 0644)) >= 0) |
437 |
{ |
438 |
write (fd, &ll, sizeof (ll)); |
439 |
close (fd); |
440 |
} |
441 |
# else |
442 |
if ((fd = open (fname, O_RDWR)) != -1) |
443 |
{ |
444 |
if (lseek (fd, (off_t) ((long)pwent->pw_uid * sizeof (ll)), |
445 |
SEEK_SET) != -1) |
446 |
write (fd, &ll, sizeof (ll)); |
447 |
close (fd); |
448 |
} |
449 |
# endif /* LASTLOG_IS_DIR */ |
450 |
# endif /* HAVE_STRUCT_LASTLOG */ |
451 |
} |
452 |
#endif /* LASTLOG_SUPPORT */ |
453 |
/* ------------------------------------------------------------------------- */ |
454 |
|
455 |
#endif /* UTMP_SUPPORT */ |