| 1 |
/*--------------------------------*-C-*---------------------------------* |
| 2 |
* File: logging.c |
| 3 |
*----------------------------------------------------------------------* |
| 4 |
* $Id: logging.C,v 1.2 2003/11/23 19:32:50 root Exp $ |
| 5 |
* |
| 6 |
* All portions of code are copyright by their respective author/s. |
| 7 |
* Copyright (c) 1992 John Bovey <jdb@ukc.ac.uk> |
| 8 |
* - original version |
| 9 |
* Copyright (c) 1993 lipka |
| 10 |
* Copyright (c) 1993 Brian Stempien <stempien@cs.wmich.edu> |
| 11 |
* Copyright (c) 1995 Raul Garcia Garcia <rgg@tid.es> |
| 12 |
* Copyright (c) 1995 Piet W. Plomp <piet@idefix.icce.rug.nl> |
| 13 |
* Copyright (c) 1997 Raul Garcia Garcia <rgg@tid.es> |
| 14 |
* Copyright (c) 1998-2001 Geoff Wing <gcw@pobox.com> |
| 15 |
* - extensive modifications |
| 16 |
* Copyright (c) 1999 D J Hawkey Jr <hawkeyd@visi.com> |
| 17 |
* - lastlog support |
| 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 |
/* |
| 48 |
* BSD style utmp entry |
| 49 |
* ut_line, ut_name, ut_host, ut_time |
| 50 |
* SYSV style utmp (and utmpx) entry |
| 51 |
* ut_user, ut_id, ut_line, ut_pid, ut_type, ut_exit, ut_time |
| 52 |
*/ |
| 53 |
|
| 54 |
/* ------------------------------------------------------------------------- */ |
| 55 |
|
| 56 |
/* |
| 57 |
* make and write utmp and wtmp entries |
| 58 |
*/ |
| 59 |
/* EXTPROTO */ |
| 60 |
void |
| 61 |
rxvt_makeutent(pR_ const char *pty, const char *hostname) |
| 62 |
{ |
| 63 |
#ifdef HAVE_STRUCT_UTMP |
| 64 |
struct utmp *ut = &(R->h->ut); |
| 65 |
#endif |
| 66 |
#ifdef HAVE_STRUCT_UTMPX |
| 67 |
struct utmpx *utx = &(R->h->utx); |
| 68 |
#endif |
| 69 |
#ifdef HAVE_UTMP_PID |
| 70 |
int i; |
| 71 |
#endif |
| 72 |
char ut_id[5]; |
| 73 |
struct passwd *pwent = getpwuid(getuid()); |
| 74 |
|
| 75 |
if (!STRNCMP(pty, "/dev/", 5)) |
| 76 |
pty += 5; /* skip /dev/ prefix */ |
| 77 |
|
| 78 |
if (!STRNCMP(pty, "pty", 3) || !STRNCMP(pty, "tty", 3)) { |
| 79 |
STRNCPY(ut_id, (pty + 3), sizeof(ut_id)); |
| 80 |
} |
| 81 |
#ifdef HAVE_UTMP_PID |
| 82 |
else if (sscanf(pty, "pts/%d", &i) == 1) |
| 83 |
sprintf(ut_id, "vt%02x", (i & 0xff)); /* sysv naming */ |
| 84 |
#endif |
| 85 |
else if (STRNCMP(pty, "pty", 3) && STRNCMP(pty, "tty", 3)) { |
| 86 |
rxvt_print_error("can't parse tty name \"%s\"", pty); |
| 87 |
return; |
| 88 |
} |
| 89 |
|
| 90 |
#ifdef HAVE_STRUCT_UTMP |
| 91 |
MEMSET(ut, 0, sizeof(struct utmp)); |
| 92 |
# ifdef HAVE_UTMP_PID |
| 93 |
setutent(); |
| 94 |
STRNCPY(ut->ut_id, ut_id, sizeof(ut->ut_id)); |
| 95 |
ut->ut_type = DEAD_PROCESS; |
| 96 |
getutid(ut); /* position to entry in utmp file */ |
| 97 |
STRNCPY(R->h->ut_id, ut_id, sizeof(R->h->ut_id)); |
| 98 |
# endif |
| 99 |
#endif |
| 100 |
|
| 101 |
#ifdef HAVE_STRUCT_UTMPX |
| 102 |
MEMSET(utx, 0, sizeof(struct utmpx)); |
| 103 |
setutxent(); |
| 104 |
STRNCPY(utx->ut_id, ut_id, sizeof(utx->ut_id)); |
| 105 |
utx->ut_type = DEAD_PROCESS; |
| 106 |
getutxid(utx); /* position to entry in utmp file */ |
| 107 |
STRNCPY(R->h->ut_id, ut_id, sizeof(R->h->ut_id)); |
| 108 |
#endif |
| 109 |
|
| 110 |
#ifdef HAVE_STRUCT_UTMP |
| 111 |
STRNCPY(ut->ut_line, pty, sizeof(ut->ut_line)); |
| 112 |
ut->ut_time = time(NULL); |
| 113 |
# ifdef HAVE_UTMP_PID |
| 114 |
STRNCPY(ut->ut_user, (pwent && pwent->pw_name) ? pwent->pw_name : "?", |
| 115 |
sizeof(ut->ut_user)); |
| 116 |
STRNCPY(ut->ut_id, ut_id, sizeof(ut->ut_id)); |
| 117 |
ut->ut_time = time(NULL); |
| 118 |
ut->ut_pid = R->h->cmd_pid; |
| 119 |
# ifdef HAVE_UTMP_HOST |
| 120 |
STRNCPY(ut->ut_host, hostname, sizeof(ut->ut_host)); |
| 121 |
# endif |
| 122 |
ut->ut_type = USER_PROCESS; |
| 123 |
pututline(ut); |
| 124 |
endutent(); /* close the file */ |
| 125 |
R->h->utmp_pos = 0; |
| 126 |
# else |
| 127 |
STRNCPY(ut->ut_name, (pwent && pwent->pw_name) ? pwent->pw_name : "?", |
| 128 |
sizeof(ut->ut_name)); |
| 129 |
# ifdef HAVE_UTMP_HOST |
| 130 |
STRNCPY(ut->ut_host, hostname, sizeof(ut->ut_host)); |
| 131 |
# endif |
| 132 |
# endif |
| 133 |
#endif |
| 134 |
|
| 135 |
#ifdef HAVE_STRUCT_UTMPX |
| 136 |
STRNCPY(utx->ut_line, pty, sizeof(utx->ut_line)); |
| 137 |
STRNCPY(utx->ut_user, (pwent && pwent->pw_name) ? pwent->pw_name : "?", |
| 138 |
sizeof(utx->ut_user)); |
| 139 |
STRNCPY(utx->ut_id, ut_id, sizeof(utx->ut_id)); |
| 140 |
utx->ut_session = getsid(0); |
| 141 |
utx->ut_tv.tv_sec = time(NULL); |
| 142 |
utx->ut_tv.tv_usec = 0; |
| 143 |
utx->ut_pid = R->h->cmd_pid; |
| 144 |
# ifdef HAVE_UTMPX_HOST |
| 145 |
STRNCPY(utx->ut_host, hostname, sizeof(utx->ut_host)); |
| 146 |
# if 0 |
| 147 |
{ |
| 148 |
char *colon; |
| 149 |
|
| 150 |
if ((colon = STRRCHR(ut->ut_host, ':')) != NULL) |
| 151 |
*colon = '\0'; |
| 152 |
} |
| 153 |
# endif |
| 154 |
# endif |
| 155 |
utx->ut_type = USER_PROCESS; |
| 156 |
pututxline(utx); |
| 157 |
endutxent(); /* close the file */ |
| 158 |
R->h->utmp_pos = 0; |
| 159 |
#endif |
| 160 |
|
| 161 |
#if defined(HAVE_STRUCT_UTMP) && !defined(HAVE_UTMP_PID) |
| 162 |
{ |
| 163 |
int i; |
| 164 |
# ifdef HAVE_TTYSLOT |
| 165 |
i = ttyslot(); |
| 166 |
if (rxvt_write_bsd_utmp(i, ut)) |
| 167 |
R->h->utmp_pos = i; |
| 168 |
# else |
| 169 |
FILE *fd0; |
| 170 |
|
| 171 |
if ((fd0 = fopen(TTYTAB_FILENAME, "r")) != NULL) { |
| 172 |
char buf[256], name[256]; |
| 173 |
|
| 174 |
buf[sizeof(buf) - 1] = '\0'; |
| 175 |
for (i = 1; (fgets(buf, sizeof(buf) - 1, fd0) != NULL);) { |
| 176 |
if (*buf == '#' || sscanf(buf, "%s", name) != 1) |
| 177 |
continue; |
| 178 |
if (!STRCMP(ut->ut_line, name)) { |
| 179 |
if (!rxvt_write_bsd_utmp(i, ut)) |
| 180 |
i = 0; |
| 181 |
R->h->utmp_pos = i; |
| 182 |
fclose(fd0); |
| 183 |
break; |
| 184 |
} |
| 185 |
i++; |
| 186 |
} |
| 187 |
fclose(fd0); |
| 188 |
} |
| 189 |
# endif |
| 190 |
} |
| 191 |
#endif |
| 192 |
|
| 193 |
#ifdef WTMP_SUPPORT |
| 194 |
# ifdef WTMP_ONLY_ON_LOGIN |
| 195 |
if (R->Options & Opt_loginShell) |
| 196 |
# endif |
| 197 |
{ |
| 198 |
# ifdef HAVE_STRUCT_UTMP |
| 199 |
# ifdef HAVE_UPDWTMP |
| 200 |
updwtmp(RXVT_WTMP_FILE, ut); |
| 201 |
# else |
| 202 |
rxvt_update_wtmp(RXVT_WTMP_FILE, ut); |
| 203 |
# endif |
| 204 |
# endif |
| 205 |
# ifdef HAVE_STRUCT_UTMPX |
| 206 |
updwtmpx(RXVT_WTMPX_FILE, utx); |
| 207 |
# endif |
| 208 |
} |
| 209 |
#endif |
| 210 |
#if defined(LASTLOG_SUPPORT) && defined(RXVT_LASTLOG_FILE) |
| 211 |
if (R->Options & Opt_loginShell) |
| 212 |
rxvt_update_lastlog(RXVT_LASTLOG_FILE, pty, hostname); |
| 213 |
#endif |
| 214 |
} |
| 215 |
|
| 216 |
/* ------------------------------------------------------------------------- */ |
| 217 |
/* |
| 218 |
* remove utmp and wtmp entries |
| 219 |
*/ |
| 220 |
/* EXTPROTO */ |
| 221 |
void |
| 222 |
rxvt_cleanutent(pR) |
| 223 |
{ |
| 224 |
#ifdef HAVE_STRUCT_UTMP |
| 225 |
struct utmp *ut = &(R->h->ut); |
| 226 |
#endif |
| 227 |
#ifdef HAVE_STRUCT_UTMPX |
| 228 |
struct utmpx *tmputx, *utx = &(R->h->utx); |
| 229 |
#endif |
| 230 |
|
| 231 |
#ifdef HAVE_STRUCT_UTMP |
| 232 |
# ifdef HAVE_UTMP_PID |
| 233 |
MEMSET(ut, 0, sizeof(struct utmp)); |
| 234 |
setutent(); |
| 235 |
STRNCPY(ut->ut_id, R->h->ut_id, sizeof(ut->ut_id)); |
| 236 |
ut->ut_type = USER_PROCESS; |
| 237 |
{ |
| 238 |
struct utmp *tmput = getutid(ut); |
| 239 |
|
| 240 |
if (tmput) /* position to entry in utmp file */ |
| 241 |
ut = tmput; |
| 242 |
} |
| 243 |
ut->ut_type = DEAD_PROCESS; |
| 244 |
# else |
| 245 |
MEMSET(ut->ut_name, 0, sizeof(ut->ut_name)); |
| 246 |
# ifdef HAVE_UTMP_HOST |
| 247 |
MEMSET(ut->ut_host, 0, sizeof(ut->ut_host)); |
| 248 |
# endif |
| 249 |
# endif |
| 250 |
ut->ut_time = time(NULL); |
| 251 |
#endif |
| 252 |
|
| 253 |
#ifdef HAVE_STRUCT_UTMPX |
| 254 |
MEMSET(utx, 0, sizeof(struct utmpx)); |
| 255 |
setutxent(); |
| 256 |
STRNCPY(utx->ut_id, R->h->ut_id, sizeof(utx->ut_id)); |
| 257 |
utx->ut_type = USER_PROCESS; |
| 258 |
if ((tmputx = getutxid(utx))) /* position to entry in utmp file */ |
| 259 |
utx = tmputx; |
| 260 |
utx->ut_type = DEAD_PROCESS; |
| 261 |
utx->ut_session = getsid(0); |
| 262 |
utx->ut_tv.tv_sec = time(NULL); |
| 263 |
utx->ut_tv.tv_usec = 0; |
| 264 |
#endif |
| 265 |
|
| 266 |
/* |
| 267 |
* Write ending wtmp entry |
| 268 |
*/ |
| 269 |
#ifdef WTMP_SUPPORT |
| 270 |
# ifdef WTMP_ONLY_ON_LOGIN |
| 271 |
if (R->Options & Opt_loginShell) |
| 272 |
# endif |
| 273 |
{ |
| 274 |
# ifdef HAVE_STRUCT_UTMP |
| 275 |
# ifdef HAVE_UPDWTMP |
| 276 |
updwtmp(RXVT_WTMP_FILE, ut); |
| 277 |
# else |
| 278 |
rxvt_update_wtmp(RXVT_WTMP_FILE, ut); |
| 279 |
# endif |
| 280 |
# endif |
| 281 |
# ifdef HAVE_STRUCT_UTMPX |
| 282 |
updwtmpx(RXVT_WTMPX_FILE, utx); |
| 283 |
# endif |
| 284 |
} |
| 285 |
#endif |
| 286 |
|
| 287 |
/* |
| 288 |
* Write utmp entry |
| 289 |
*/ |
| 290 |
#ifdef HAVE_STRUCT_UTMP |
| 291 |
# ifdef HAVE_UTMP_PID |
| 292 |
if (ut->ut_pid == R->h->cmd_pid) |
| 293 |
pututline(ut); |
| 294 |
endutent(); |
| 295 |
# else |
| 296 |
MEMSET(ut, 0, sizeof(struct utmp)); |
| 297 |
rxvt_write_bsd_utmp(R->h->utmp_pos, ut); |
| 298 |
# endif |
| 299 |
#endif |
| 300 |
#ifdef HAVE_STRUCT_UTMPX |
| 301 |
if (utx->ut_pid == R->h->cmd_pid) |
| 302 |
pututxline(utx); |
| 303 |
endutxent(); |
| 304 |
#endif |
| 305 |
} |
| 306 |
|
| 307 |
/* ------------------------------------------------------------------------- */ |
| 308 |
/* |
| 309 |
* Write a BSD style utmp entry |
| 310 |
*/ |
| 311 |
#ifdef HAVE_UTMP_H |
| 312 |
/* INTPROTO */ |
| 313 |
int |
| 314 |
rxvt_write_bsd_utmp(int utmp_pos, struct utmp *wu) |
| 315 |
{ |
| 316 |
int fd; |
| 317 |
|
| 318 |
if (utmp_pos <= 0 || (fd = open(RXVT_UTMP_FILE, O_WRONLY)) == -1) |
| 319 |
return 0; |
| 320 |
|
| 321 |
if (lseek(fd, (off_t) (utmp_pos * sizeof(struct utmp)), SEEK_SET) != -1) |
| 322 |
write(fd, wu, sizeof(struct utmp)); |
| 323 |
close(fd); |
| 324 |
return 1; |
| 325 |
} |
| 326 |
#endif |
| 327 |
|
| 328 |
/* ------------------------------------------------------------------------- */ |
| 329 |
/* |
| 330 |
* Update a BSD style wtmp entry |
| 331 |
*/ |
| 332 |
#if defined(WTMP_SUPPORT) && !defined(HAVE_UPDWTMP) |
| 333 |
/* INTPROTO */ |
| 334 |
void |
| 335 |
rxvt_update_wtmp(const char *fname, const struct utmp *putmp) |
| 336 |
{ |
| 337 |
int fd, gotlock, retry; |
| 338 |
struct flock lck; /* fcntl locking scheme */ |
| 339 |
struct stat sbuf; |
| 340 |
|
| 341 |
if ((fd = open(fname, O_WRONLY | O_APPEND, 0)) < 0) |
| 342 |
return; |
| 343 |
|
| 344 |
lck.l_whence = SEEK_END; /* start lock at current eof */ |
| 345 |
lck.l_len = 0; /* end at ``largest possible eof'' */ |
| 346 |
lck.l_start = 0; |
| 347 |
lck.l_type = F_WRLCK; /* we want a write lock */ |
| 348 |
|
| 349 |
/* attempt lock with F_SETLK; F_SETLKW would cause a deadlock! */ |
| 350 |
for (retry = 10, gotlock = 0; retry--;) |
| 351 |
if (fcntl(fd, F_SETLK, &lck) != -1) { |
| 352 |
gotlock = 1; |
| 353 |
break; |
| 354 |
} else if (errno != EAGAIN && errno != EACCES) |
| 355 |
break; |
| 356 |
if (!gotlock) { /* give it up */ |
| 357 |
close(fd); |
| 358 |
return; |
| 359 |
} |
| 360 |
if (fstat(fd, &sbuf) == 0) |
| 361 |
if (write(fd, putmp, sizeof(struct utmp)) != sizeof(struct utmp)) |
| 362 |
ftruncate(fd, sbuf.st_size); /* remove bad writes */ |
| 363 |
|
| 364 |
lck.l_type = F_UNLCK; /* unlocking the file */ |
| 365 |
fcntl(fd, F_SETLK, &lck); |
| 366 |
close(fd); |
| 367 |
} |
| 368 |
#endif |
| 369 |
|
| 370 |
/* ------------------------------------------------------------------------- */ |
| 371 |
#ifdef LASTLOG_SUPPORT |
| 372 |
/* INTPROTO */ |
| 373 |
void |
| 374 |
rxvt_update_lastlog(const char *fname, const char *pty, const char *host) |
| 375 |
{ |
| 376 |
# ifdef HAVE_STRUCT_LASTLOGX |
| 377 |
struct lastlogx llx; |
| 378 |
# endif |
| 379 |
# ifdef HAVE_STRUCT_LASTLOG |
| 380 |
int fd; |
| 381 |
struct lastlog ll; |
| 382 |
# ifdef LASTLOG_IS_DIR |
| 383 |
char lastlogfile[256]; |
| 384 |
# endif |
| 385 |
struct passwd *pwent; |
| 386 |
# endif |
| 387 |
|
| 388 |
# ifdef HAVE_STRUCT_LASTLOGX |
| 389 |
MEMSET(&llx, 0, sizeof(llx)); |
| 390 |
llx.ll_tv.tv_sec = time(NULL); |
| 391 |
llx.ll_tv.tv_usec = 0; |
| 392 |
STRNCPY(llx.ll_line, pty, sizeof(llx.ll_line)); |
| 393 |
STRNCPY(llx.ll_host, host, sizeof(llx.ll_host)); |
| 394 |
updlastlogx(RXVT_LASTLOGX_FILE, getuid(), &llx); |
| 395 |
# endif |
| 396 |
|
| 397 |
# ifdef HAVE_STRUCT_LASTLOG |
| 398 |
pwent = getpwuid(getuid()); |
| 399 |
if (!pwent) { |
| 400 |
rxvt_print_error("no entry in password file"); |
| 401 |
return; |
| 402 |
} |
| 403 |
MEMSET(&ll, 0, sizeof(ll)); |
| 404 |
ll.ll_time = time(NULL); |
| 405 |
STRNCPY(ll.ll_line, pty, sizeof(ll.ll_line)); |
| 406 |
STRNCPY(ll.ll_host, host, sizeof(ll.ll_host)); |
| 407 |
# ifdef LASTLOG_IS_DIR |
| 408 |
sprintf(lastlogfile, "%.*s/%.*s", |
| 409 |
sizeof(lastlogfile) - sizeof(pwent->pw_name) - 2, fname, |
| 410 |
sizeof(pwent->pw_name), |
| 411 |
(!pwent->pw_name || pwent->pw_name[0] == '\0') ? "unknown" |
| 412 |
: pwent->pw_name); |
| 413 |
if ((fd = open(lastlogfile, O_WRONLY | O_CREAT, 0644)) >= 0) { |
| 414 |
write(fd, &ll, sizeof(ll)); |
| 415 |
close(fd); |
| 416 |
} |
| 417 |
# else |
| 418 |
if ((fd = open(fname, O_RDWR)) != -1) { |
| 419 |
if (lseek(fd, (off_t) ((long)pwent->pw_uid * sizeof(ll)), |
| 420 |
SEEK_SET) != -1) |
| 421 |
write(fd, &ll, sizeof(ll)); |
| 422 |
close(fd); |
| 423 |
} |
| 424 |
# endif /* LASTLOG_IS_DIR */ |
| 425 |
# endif /* HAVE_STRUCT_LASTLOG */ |
| 426 |
} |
| 427 |
#endif /* LASTLOG_SUPPORT */ |
| 428 |
/* ------------------------------------------------------------------------- */ |
| 429 |
|
| 430 |
#endif /* UTMP_SUPPORT */ |
