1 /* 2 * Copyright (c) 1983, 1988 Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 char copyright[] = 10 "@(#) Copyright (c) 1983, 1988 Regents of the University of California.\n\ 11 All rights reserved.\n"; 12 #endif /* not lint */ 13 14 #ifndef lint 15 static char sccsid[] = "@(#)syslogd.c 5.45 (Berkeley) 03/02/91"; 16 #endif /* not lint */ 17 18 /* 19 * syslogd -- log system messages 20 * 21 * This program implements a system log. It takes a series of lines. 22 * Each line may have a priority, signified as "<n>" as 23 * the first characters of the line. If this is 24 * not present, a default priority is used. 25 * 26 * To kill syslogd, send a signal 15 (terminate). A signal 1 (hup) will 27 * cause it to reread its configuration file. 28 * 29 * Defined Constants: 30 * 31 * MAXLINE -- the maximimum line length that can be handled. 32 * DEFUPRI -- the default priority for user messages 33 * DEFSPRI -- the default priority for kernel messages 34 * 35 * Author: Eric Allman 36 * extensive changes by Ralph Campbell 37 * more extensive changes by Eric Allman (again) 38 */ 39 40 #define MAXLINE 1024 /* maximum line length */ 41 #define MAXSVLINE 120 /* maximum saved line length */ 42 #define DEFUPRI (LOG_USER|LOG_NOTICE) 43 #define DEFSPRI (LOG_KERN|LOG_CRIT) 44 #define TIMERINTVL 30 /* interval for checking flush, mark */ 45 46 #include <sys/param.h> 47 #include <sys/errno.h> 48 #include <sys/ioctl.h> 49 #include <sys/stat.h> 50 #include <sys/wait.h> 51 #include <sys/socket.h> 52 #include <sys/file.h> 53 #include <sys/msgbuf.h> 54 #include <sys/uio.h> 55 #include <sys/un.h> 56 #include <sys/time.h> 57 #include <sys/resource.h> 58 #include <sys/signal.h> 59 60 #include <netinet/in.h> 61 #include <netdb.h> 62 63 #include <utmp.h> 64 #include <setjmp.h> 65 #include <stdio.h> 66 #include <ctype.h> 67 #include <string.h> 68 #include <unistd.h> 69 #include "pathnames.h" 70 71 #define SYSLOG_NAMES 72 #include <sys/syslog.h> 73 74 char *LogName = _PATH_LOG; 75 char *ConfFile = _PATH_LOGCONF; 76 char *PidFile = _PATH_LOGPID; 77 char ctty[] = _PATH_CONSOLE; 78 79 #define FDMASK(fd) (1 << (fd)) 80 81 #define dprintf if (Debug) printf 82 83 #define MAXUNAMES 20 /* maximum number of user names */ 84 85 /* 86 * Flags to logmsg(). 87 */ 88 89 #define IGN_CONS 0x001 /* don't print on console */ 90 #define SYNC_FILE 0x002 /* do fsync on file after printing */ 91 #define ADDDATE 0x004 /* add a date to the message */ 92 #define MARK 0x008 /* this message is a mark */ 93 94 /* 95 * This structure represents the files that will have log 96 * copies printed. 97 */ 98 99 struct filed { 100 struct filed *f_next; /* next in linked list */ 101 short f_type; /* entry type, see below */ 102 short f_file; /* file descriptor */ 103 time_t f_time; /* time this was last written */ 104 u_char f_pmask[LOG_NFACILITIES+1]; /* priority mask */ 105 union { 106 char f_uname[MAXUNAMES][UT_NAMESIZE+1]; 107 struct { 108 char f_hname[MAXHOSTNAMELEN+1]; 109 struct sockaddr_in f_addr; 110 } f_forw; /* forwarding address */ 111 char f_fname[MAXPATHLEN]; 112 } f_un; 113 char f_prevline[MAXSVLINE]; /* last message logged */ 114 char f_lasttime[16]; /* time of last occurrence */ 115 char f_prevhost[MAXHOSTNAMELEN+1]; /* host from which recd. */ 116 int f_prevpri; /* pri of f_prevline */ 117 int f_prevlen; /* length of f_prevline */ 118 int f_prevcount; /* repetition cnt of prevline */ 119 int f_repeatcount; /* number of "repeated" msgs */ 120 }; 121 122 /* 123 * Intervals at which we flush out "message repeated" messages, 124 * in seconds after previous message is logged. After each flush, 125 * we move to the next interval until we reach the largest. 126 */ 127 int repeatinterval[] = { 30, 120, 600 }; /* # of secs before flush */ 128 #define MAXREPEAT ((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1) 129 #define REPEATTIME(f) ((f)->f_time + repeatinterval[(f)->f_repeatcount]) 130 #define BACKOFF(f) { if (++(f)->f_repeatcount > MAXREPEAT) \ 131 (f)->f_repeatcount = MAXREPEAT; \ 132 } 133 134 /* values for f_type */ 135 #define F_UNUSED 0 /* unused entry */ 136 #define F_FILE 1 /* regular file */ 137 #define F_TTY 2 /* terminal */ 138 #define F_CONSOLE 3 /* console terminal */ 139 #define F_FORW 4 /* remote machine */ 140 #define F_USERS 5 /* list of users */ 141 #define F_WALL 6 /* everyone logged on */ 142 143 char *TypeNames[7] = { 144 "UNUSED", "FILE", "TTY", "CONSOLE", 145 "FORW", "USERS", "WALL" 146 }; 147 148 struct filed *Files; 149 struct filed consfile; 150 151 int Debug; /* debug flag */ 152 char LocalHostName[MAXHOSTNAMELEN+1]; /* our hostname */ 153 char *LocalDomain; /* our local domain name */ 154 int InetInuse = 0; /* non-zero if INET sockets are being used */ 155 int finet; /* Internet datagram socket */ 156 int LogPort; /* port number for INET connections */ 157 int Initialized = 0; /* set when we have initialized ourselves */ 158 int MarkInterval = 20 * 60; /* interval between marks in seconds */ 159 int MarkSeq = 0; /* mark sequence number */ 160 161 extern int errno; 162 extern char *ctime(), *index(), *calloc(); 163 164 main(argc, argv) 165 int argc; 166 char **argv; 167 { 168 register int i; 169 register char *p; 170 int funix, inetm, fklog, klogm, len; 171 struct sockaddr_un sunx, fromunix; 172 struct sockaddr_in sin, frominet; 173 FILE *fp; 174 int ch; 175 char line[MSG_BSIZE + 1]; 176 extern int optind; 177 extern char *optarg; 178 void die(), domark(), init(), reapchild(); 179 180 while ((ch = getopt(argc, argv, "df:m:p:")) != EOF) 181 switch((char)ch) { 182 case 'd': /* debug */ 183 Debug++; 184 break; 185 case 'f': /* configuration file */ 186 ConfFile = optarg; 187 break; 188 case 'm': /* mark interval */ 189 MarkInterval = atoi(optarg) * 60; 190 break; 191 case 'p': /* path */ 192 LogName = optarg; 193 break; 194 case '?': 195 default: 196 usage(); 197 } 198 if (argc -= optind) 199 usage(); 200 201 if (!Debug) 202 daemon(0, 0); 203 else 204 setlinebuf(stdout); 205 206 consfile.f_type = F_CONSOLE; 207 (void) strcpy(consfile.f_un.f_fname, ctty); 208 (void) gethostname(LocalHostName, sizeof LocalHostName); 209 if (p = index(LocalHostName, '.')) { 210 *p++ = '\0'; 211 LocalDomain = p; 212 } 213 else 214 LocalDomain = ""; 215 (void) signal(SIGTERM, die); 216 (void) signal(SIGINT, Debug ? die : SIG_IGN); 217 (void) signal(SIGQUIT, Debug ? die : SIG_IGN); 218 (void) signal(SIGCHLD, reapchild); 219 (void) signal(SIGALRM, domark); 220 (void) alarm(TIMERINTVL); 221 (void) unlink(LogName); 222 223 bzero((char *)&sunx, sizeof(sunx)); 224 sunx.sun_family = AF_UNIX; 225 (void) strncpy(sunx.sun_path, LogName, sizeof sunx.sun_path); 226 funix = socket(AF_UNIX, SOCK_DGRAM, 0); 227 if (funix < 0 || bind(funix, (struct sockaddr *) &sunx, 228 sizeof(sunx.sun_family)+sizeof(sunx.sun_len)+ 229 strlen(sunx.sun_path)) < 0 || 230 chmod(LogName, 0666) < 0) { 231 (void) sprintf(line, "cannot create %s", LogName); 232 logerror(line); 233 dprintf("cannot create %s (%d)\n", LogName, errno); 234 die(0); 235 } 236 finet = socket(AF_INET, SOCK_DGRAM, 0); 237 if (finet >= 0) { 238 struct servent *sp; 239 240 sp = getservbyname("syslog", "udp"); 241 if (sp == NULL) { 242 errno = 0; 243 logerror("syslog/udp: unknown service"); 244 die(0); 245 } 246 sin.sin_family = AF_INET; 247 sin.sin_port = LogPort = sp->s_port; 248 if (bind(finet, (struct sockaddr *)&sin, sizeof(sin)) < 0) { 249 logerror("bind"); 250 if (!Debug) 251 die(0); 252 } else { 253 inetm = FDMASK(finet); 254 InetInuse = 1; 255 } 256 } 257 if ((fklog = open(_PATH_KLOG, O_RDONLY, 0)) >= 0) 258 klogm = FDMASK(fklog); 259 else { 260 dprintf("can't open %s (%d)\n", _PATH_KLOG, errno); 261 klogm = 0; 262 } 263 264 /* tuck my process id away */ 265 fp = fopen(PidFile, "w"); 266 if (fp != NULL) { 267 fprintf(fp, "%d\n", getpid()); 268 (void) fclose(fp); 269 } 270 271 dprintf("off & running....\n"); 272 273 init(); 274 (void) signal(SIGHUP, init); 275 276 for (;;) { 277 int nfds, readfds = FDMASK(funix) | inetm | klogm; 278 279 errno = 0; 280 dprintf("readfds = %#x\n", readfds); 281 nfds = select(20, (fd_set *) &readfds, (fd_set *) NULL, 282 (fd_set *) NULL, (struct timeval *) NULL); 283 if (nfds == 0) 284 continue; 285 if (nfds < 0) { 286 if (errno != EINTR) 287 logerror("select"); 288 continue; 289 } 290 dprintf("got a message (%d, %#x)\n", nfds, readfds); 291 if (readfds & klogm) { 292 i = read(fklog, line, sizeof(line) - 1); 293 if (i > 0) { 294 line[i] = '\0'; 295 printsys(line); 296 } else if (i < 0 && errno != EINTR) { 297 logerror("klog"); 298 fklog = -1; 299 klogm = 0; 300 } 301 } 302 if (readfds & FDMASK(funix)) { 303 len = sizeof fromunix; 304 i = recvfrom(funix, line, MAXLINE, 0, 305 (struct sockaddr *) &fromunix, &len); 306 if (i > 0) { 307 line[i] = '\0'; 308 printline(LocalHostName, line); 309 } else if (i < 0 && errno != EINTR) 310 logerror("recvfrom unix"); 311 } 312 if (readfds & inetm) { 313 len = sizeof frominet; 314 i = recvfrom(finet, line, MAXLINE, 0, 315 (struct sockaddr *) &frominet, &len); 316 if (i > 0) { 317 extern char *cvthname(); 318 319 line[i] = '\0'; 320 printline(cvthname(&frominet), line); 321 } else if (i < 0 && errno != EINTR) 322 logerror("recvfrom inet"); 323 } 324 } 325 } 326 327 usage() 328 { 329 (void) fprintf(stderr, 330 "usage: syslogd [-f conffile] [-m markinterval] [-p logpath]\n"); 331 exit(1); 332 } 333 334 /* 335 * Take a raw input line, decode the message, and print the message 336 * on the appropriate log files. 337 */ 338 339 printline(hname, msg) 340 char *hname; 341 char *msg; 342 { 343 register char *p, *q; 344 register int c; 345 char line[MAXLINE + 1]; 346 int pri; 347 348 /* test for special codes */ 349 pri = DEFUPRI; 350 p = msg; 351 if (*p == '<') { 352 pri = 0; 353 while (isdigit(*++p)) 354 pri = 10 * pri + (*p - '0'); 355 if (*p == '>') 356 ++p; 357 } 358 if (pri &~ (LOG_FACMASK|LOG_PRIMASK)) 359 pri = DEFUPRI; 360 361 /* don't allow users to log kernel messages */ 362 if (LOG_FAC(pri) == LOG_KERN) 363 pri = LOG_MAKEPRI(LOG_USER, LOG_PRI(pri)); 364 365 q = line; 366 367 while ((c = *p++ & 0177) != '\0' && 368 q < &line[sizeof(line) - 1]) 369 if (iscntrl(c)) 370 if (c == '\n') 371 *q++ = ' '; 372 else if (c == '\t') 373 *q++ = '\t'; 374 else { 375 *q++ = '^'; 376 *q++ = c ^ 0100; 377 } 378 else 379 *q++ = c; 380 *q = '\0'; 381 382 logmsg(pri, line, hname, 0); 383 } 384 385 /* 386 * Take a raw input line from /dev/klog, split and format similar to syslog(). 387 */ 388 389 printsys(msg) 390 char *msg; 391 { 392 register char *p, *q; 393 register int c; 394 char line[MAXLINE + 1]; 395 int pri, flags; 396 char *lp; 397 398 (void) strcpy(line, "vmunix: "); 399 lp = line + strlen(line); 400 for (p = msg; *p != '\0'; ) { 401 flags = SYNC_FILE | ADDDATE; /* fsync file after write */ 402 pri = DEFSPRI; 403 if (*p == '<') { 404 pri = 0; 405 while (isdigit(*++p)) 406 pri = 10 * pri + (*p - '0'); 407 if (*p == '>') 408 ++p; 409 } else { 410 /* kernel printf's come out on console */ 411 flags |= IGN_CONS; 412 } 413 if (pri &~ (LOG_FACMASK|LOG_PRIMASK)) 414 pri = DEFSPRI; 415 q = lp; 416 while (*p != '\0' && (c = *p++) != '\n' && 417 q < &line[MAXLINE]) 418 *q++ = c; 419 *q = '\0'; 420 logmsg(pri, line, LocalHostName, flags); 421 } 422 } 423 424 time_t now; 425 426 /* 427 * Log a message to the appropriate log files, users, etc. based on 428 * the priority. 429 */ 430 431 logmsg(pri, msg, from, flags) 432 int pri; 433 char *msg, *from; 434 int flags; 435 { 436 register struct filed *f; 437 int fac, prilev; 438 int omask, msglen; 439 char *timestamp; 440 time_t time(); 441 442 dprintf("logmsg: pri %o, flags %x, from %s, msg %s\n", 443 pri, flags, from, msg); 444 445 omask = sigblock(sigmask(SIGHUP)|sigmask(SIGALRM)); 446 447 /* 448 * Check to see if msg looks non-standard. 449 */ 450 msglen = strlen(msg); 451 if (msglen < 16 || msg[3] != ' ' || msg[6] != ' ' || 452 msg[9] != ':' || msg[12] != ':' || msg[15] != ' ') 453 flags |= ADDDATE; 454 455 (void) time(&now); 456 if (flags & ADDDATE) 457 timestamp = ctime(&now) + 4; 458 else { 459 timestamp = msg; 460 msg += 16; 461 msglen -= 16; 462 } 463 464 /* extract facility and priority level */ 465 if (flags & MARK) 466 fac = LOG_NFACILITIES; 467 else 468 fac = LOG_FAC(pri); 469 prilev = LOG_PRI(pri); 470 471 /* log the message to the particular outputs */ 472 if (!Initialized) { 473 f = &consfile; 474 f->f_file = open(ctty, O_WRONLY, 0); 475 476 if (f->f_file >= 0) { 477 fprintlog(f, flags, msg); 478 (void) close(f->f_file); 479 } 480 (void) sigsetmask(omask); 481 return; 482 } 483 for (f = Files; f; f = f->f_next) { 484 /* skip messages that are incorrect priority */ 485 if (f->f_pmask[fac] < prilev || 486 f->f_pmask[fac] == INTERNAL_NOPRI) 487 continue; 488 489 if (f->f_type == F_CONSOLE && (flags & IGN_CONS)) 490 continue; 491 492 /* don't output marks to recently written files */ 493 if ((flags & MARK) && (now - f->f_time) < MarkInterval / 2) 494 continue; 495 496 /* 497 * suppress duplicate lines to this file 498 */ 499 if ((flags & MARK) == 0 && msglen == f->f_prevlen && 500 !strcmp(msg, f->f_prevline) && 501 !strcmp(from, f->f_prevhost)) { 502 (void) strncpy(f->f_lasttime, timestamp, 15); 503 f->f_prevcount++; 504 dprintf("msg repeated %d times, %ld sec of %d\n", 505 f->f_prevcount, now - f->f_time, 506 repeatinterval[f->f_repeatcount]); 507 /* 508 * If domark would have logged this by now, 509 * flush it now (so we don't hold isolated messages), 510 * but back off so we'll flush less often 511 * in the future. 512 */ 513 if (now > REPEATTIME(f)) { 514 fprintlog(f, flags, (char *)NULL); 515 BACKOFF(f); 516 } 517 } else { 518 /* new line, save it */ 519 if (f->f_prevcount) 520 fprintlog(f, 0, (char *)NULL); 521 f->f_repeatcount = 0; 522 (void) strncpy(f->f_lasttime, timestamp, 15); 523 (void) strncpy(f->f_prevhost, from, 524 sizeof(f->f_prevhost)); 525 if (msglen < MAXSVLINE) { 526 f->f_prevlen = msglen; 527 f->f_prevpri = pri; 528 (void) strcpy(f->f_prevline, msg); 529 fprintlog(f, flags, (char *)NULL); 530 } else { 531 f->f_prevline[0] = 0; 532 f->f_prevlen = 0; 533 fprintlog(f, flags, msg); 534 } 535 } 536 } 537 (void) sigsetmask(omask); 538 } 539 540 fprintlog(f, flags, msg) 541 register struct filed *f; 542 int flags; 543 char *msg; 544 { 545 struct iovec iov[6]; 546 register struct iovec *v; 547 register int l; 548 char line[MAXLINE + 1], repbuf[80], greetings[200]; 549 550 v = iov; 551 if (f->f_type == F_WALL) { 552 v->iov_base = greetings; 553 v->iov_len = sprintf(greetings, 554 "\r\n\7Message from syslogd@%s at %.24s ...\r\n", 555 f->f_prevhost, ctime(&now)); 556 v++; 557 v->iov_base = ""; 558 v->iov_len = 0; 559 v++; 560 } else { 561 v->iov_base = f->f_lasttime; 562 v->iov_len = 15; 563 v++; 564 v->iov_base = " "; 565 v->iov_len = 1; 566 v++; 567 } 568 v->iov_base = f->f_prevhost; 569 v->iov_len = strlen(v->iov_base); 570 v++; 571 v->iov_base = " "; 572 v->iov_len = 1; 573 v++; 574 575 if (msg) { 576 v->iov_base = msg; 577 v->iov_len = strlen(msg); 578 } else if (f->f_prevcount > 1) { 579 v->iov_base = repbuf; 580 v->iov_len = sprintf(repbuf, "last message repeated %d times", 581 f->f_prevcount); 582 } else { 583 v->iov_base = f->f_prevline; 584 v->iov_len = f->f_prevlen; 585 } 586 v++; 587 588 dprintf("Logging to %s", TypeNames[f->f_type]); 589 f->f_time = now; 590 591 switch (f->f_type) { 592 case F_UNUSED: 593 dprintf("\n"); 594 break; 595 596 case F_FORW: 597 dprintf(" %s\n", f->f_un.f_forw.f_hname); 598 l = sprintf(line, "<%d>%.15s %s", f->f_prevpri, 599 iov[0].iov_base, iov[4].iov_base); 600 if (l > MAXLINE) 601 l = MAXLINE; 602 if (sendto(finet, line, l, 0, 603 (struct sockaddr *)&f->f_un.f_forw.f_addr, 604 sizeof f->f_un.f_forw.f_addr) != l) { 605 int e = errno; 606 (void) close(f->f_file); 607 f->f_type = F_UNUSED; 608 errno = e; 609 logerror("sendto"); 610 } 611 break; 612 613 case F_CONSOLE: 614 if (flags & IGN_CONS) { 615 dprintf(" (ignored)\n"); 616 break; 617 } 618 /* FALLTHROUGH */ 619 620 case F_TTY: 621 case F_FILE: 622 dprintf(" %s\n", f->f_un.f_fname); 623 if (f->f_type != F_FILE) { 624 v->iov_base = "\r\n"; 625 v->iov_len = 2; 626 } else { 627 v->iov_base = "\n"; 628 v->iov_len = 1; 629 } 630 again: 631 if (writev(f->f_file, iov, 6) < 0) { 632 int e = errno; 633 (void) close(f->f_file); 634 /* 635 * Check for errors on TTY's due to loss of tty 636 */ 637 if ((e == EIO || e == EBADF) && f->f_type != F_FILE) { 638 f->f_file = open(f->f_un.f_fname, 639 O_WRONLY|O_APPEND, 0); 640 if (f->f_file < 0) { 641 f->f_type = F_UNUSED; 642 logerror(f->f_un.f_fname); 643 } else 644 goto again; 645 } else { 646 f->f_type = F_UNUSED; 647 errno = e; 648 logerror(f->f_un.f_fname); 649 } 650 } else if (flags & SYNC_FILE) 651 (void) fsync(f->f_file); 652 break; 653 654 case F_USERS: 655 case F_WALL: 656 dprintf("\n"); 657 v->iov_base = "\r\n"; 658 v->iov_len = 2; 659 wallmsg(f, iov); 660 break; 661 } 662 f->f_prevcount = 0; 663 } 664 665 /* 666 * WALLMSG -- Write a message to the world at large 667 * 668 * Write the specified message to either the entire 669 * world, or a list of approved users. 670 */ 671 672 wallmsg(f, iov) 673 register struct filed *f; 674 struct iovec *iov; 675 { 676 static int reenter; /* avoid calling ourselves */ 677 register FILE *uf; 678 register int i; 679 struct utmp ut; 680 char *p, *ttymsg(); 681 682 if (reenter++) 683 return; 684 if ((uf = fopen(_PATH_UTMP, "r")) == NULL) { 685 logerror(_PATH_UTMP); 686 reenter = 0; 687 return; 688 } 689 /* NOSTRICT */ 690 while (fread((char *) &ut, sizeof ut, 1, uf) == 1) { 691 if (ut.ut_name[0] == '\0') 692 continue; 693 if (f->f_type == F_WALL) { 694 if (p = ttymsg(iov, 6, ut.ut_line, 1)) { 695 errno = 0; /* already in msg */ 696 logerror(p); 697 } 698 continue; 699 } 700 /* should we send the message to this user? */ 701 for (i = 0; i < MAXUNAMES; i++) { 702 if (!f->f_un.f_uname[i][0]) 703 break; 704 if (!strncmp(f->f_un.f_uname[i], ut.ut_name, 705 UT_NAMESIZE)) { 706 if (p = ttymsg(iov, 6, ut.ut_line, 1)) { 707 errno = 0; /* already in msg */ 708 logerror(p); 709 } 710 break; 711 } 712 } 713 } 714 (void) fclose(uf); 715 reenter = 0; 716 } 717 718 void 719 reapchild() 720 { 721 union wait status; 722 723 while (wait3((int *)&status, WNOHANG, (struct rusage *) NULL) > 0) 724 ; 725 } 726 727 /* 728 * Return a printable representation of a host address. 729 */ 730 char * 731 cvthname(f) 732 struct sockaddr_in *f; 733 { 734 struct hostent *hp; 735 register char *p; 736 extern char *inet_ntoa(); 737 738 dprintf("cvthname(%s)\n", inet_ntoa(f->sin_addr)); 739 740 if (f->sin_family != AF_INET) { 741 dprintf("Malformed from address\n"); 742 return ("???"); 743 } 744 hp = gethostbyaddr((char *)&f->sin_addr, 745 sizeof(struct in_addr), f->sin_family); 746 if (hp == 0) { 747 dprintf("Host name for your address (%s) unknown\n", 748 inet_ntoa(f->sin_addr)); 749 return (inet_ntoa(f->sin_addr)); 750 } 751 if ((p = index(hp->h_name, '.')) && strcmp(p + 1, LocalDomain) == 0) 752 *p = '\0'; 753 return (hp->h_name); 754 } 755 756 void 757 domark() 758 { 759 register struct filed *f; 760 time_t time(); 761 762 now = time((time_t *)NULL); 763 MarkSeq += TIMERINTVL; 764 if (MarkSeq >= MarkInterval) { 765 logmsg(LOG_INFO, "-- MARK --", LocalHostName, ADDDATE|MARK); 766 MarkSeq = 0; 767 } 768 769 for (f = Files; f; f = f->f_next) { 770 if (f->f_prevcount && now >= REPEATTIME(f)) { 771 dprintf("flush %s: repeated %d times, %d sec.\n", 772 TypeNames[f->f_type], f->f_prevcount, 773 repeatinterval[f->f_repeatcount]); 774 fprintlog(f, 0, (char *)NULL); 775 BACKOFF(f); 776 } 777 } 778 (void) alarm(TIMERINTVL); 779 } 780 781 /* 782 * Print syslogd errors some place. 783 */ 784 logerror(type) 785 char *type; 786 { 787 char buf[100], *strerror(); 788 789 if (errno) 790 (void) sprintf(buf, "syslogd: %s: %s", type, strerror(errno)); 791 else 792 (void) sprintf(buf, "syslogd: %s", type); 793 errno = 0; 794 dprintf("%s\n", buf); 795 logmsg(LOG_SYSLOG|LOG_ERR, buf, LocalHostName, ADDDATE); 796 } 797 798 void 799 die(sig) 800 { 801 register struct filed *f; 802 char buf[100]; 803 804 for (f = Files; f != NULL; f = f->f_next) { 805 /* flush any pending output */ 806 if (f->f_prevcount) 807 fprintlog(f, 0, (char *)NULL); 808 } 809 if (sig) { 810 dprintf("syslogd: exiting on signal %d\n", sig); 811 (void) sprintf(buf, "exiting on signal %d", sig); 812 errno = 0; 813 logerror(buf); 814 } 815 (void) unlink(LogName); 816 exit(0); 817 } 818 819 /* 820 * INIT -- Initialize syslogd from configuration table 821 */ 822 823 void 824 init() 825 { 826 register int i; 827 register FILE *cf; 828 register struct filed *f, *next, **nextp; 829 register char *p; 830 char cline[BUFSIZ]; 831 832 dprintf("init\n"); 833 834 /* 835 * Close all open log files. 836 */ 837 Initialized = 0; 838 for (f = Files; f != NULL; f = next) { 839 /* flush any pending output */ 840 if (f->f_prevcount) 841 fprintlog(f, 0, (char *)NULL); 842 843 switch (f->f_type) { 844 case F_FILE: 845 case F_TTY: 846 case F_CONSOLE: 847 case F_FORW: 848 (void) close(f->f_file); 849 break; 850 } 851 next = f->f_next; 852 free((char *) f); 853 } 854 Files = NULL; 855 nextp = &Files; 856 857 /* open the configuration file */ 858 if ((cf = fopen(ConfFile, "r")) == NULL) { 859 dprintf("cannot open %s\n", ConfFile); 860 *nextp = (struct filed *)calloc(1, sizeof(*f)); 861 cfline("*.ERR\t/dev/console", *nextp); 862 (*nextp)->f_next = (struct filed *)calloc(1, sizeof(*f)); 863 cfline("*.PANIC\t*", (*nextp)->f_next); 864 Initialized = 1; 865 return; 866 } 867 868 /* 869 * Foreach line in the conf table, open that file. 870 */ 871 f = NULL; 872 while (fgets(cline, sizeof cline, cf) != NULL) { 873 /* 874 * check for end-of-section, comments, strip off trailing 875 * spaces and newline character. 876 */ 877 for (p = cline; isspace(*p); ++p); 878 if (*p == NULL || *p == '#') 879 continue; 880 for (p = index(cline, '\0'); isspace(*--p);); 881 *++p = '\0'; 882 f = (struct filed *)calloc(1, sizeof(*f)); 883 *nextp = f; 884 nextp = &f->f_next; 885 cfline(cline, f); 886 } 887 888 /* close the configuration file */ 889 (void) fclose(cf); 890 891 Initialized = 1; 892 893 if (Debug) { 894 for (f = Files; f; f = f->f_next) { 895 for (i = 0; i <= LOG_NFACILITIES; i++) 896 if (f->f_pmask[i] == INTERNAL_NOPRI) 897 printf("X "); 898 else 899 printf("%d ", f->f_pmask[i]); 900 printf("%s: ", TypeNames[f->f_type]); 901 switch (f->f_type) { 902 case F_FILE: 903 case F_TTY: 904 case F_CONSOLE: 905 printf("%s", f->f_un.f_fname); 906 break; 907 908 case F_FORW: 909 printf("%s", f->f_un.f_forw.f_hname); 910 break; 911 912 case F_USERS: 913 for (i = 0; i < MAXUNAMES && *f->f_un.f_uname[i]; i++) 914 printf("%s, ", f->f_un.f_uname[i]); 915 break; 916 } 917 printf("\n"); 918 } 919 } 920 921 logmsg(LOG_SYSLOG|LOG_INFO, "syslogd: restart", LocalHostName, ADDDATE); 922 dprintf("syslogd: restarted\n"); 923 } 924 925 /* 926 * Crack a configuration file line 927 */ 928 929 cfline(line, f) 930 char *line; 931 register struct filed *f; 932 { 933 register char *p; 934 register char *q; 935 register int i; 936 char *bp; 937 int pri; 938 struct hostent *hp; 939 char buf[MAXLINE], ebuf[100]; 940 941 dprintf("cfline(%s)\n", line); 942 943 errno = 0; /* keep strerror() stuff out of logerror messages */ 944 945 /* clear out file entry */ 946 bzero((char *) f, sizeof *f); 947 for (i = 0; i <= LOG_NFACILITIES; i++) 948 f->f_pmask[i] = INTERNAL_NOPRI; 949 950 /* scan through the list of selectors */ 951 for (p = line; *p && *p != '\t';) { 952 953 /* find the end of this facility name list */ 954 for (q = p; *q && *q != '\t' && *q++ != '.'; ) 955 continue; 956 957 /* collect priority name */ 958 for (bp = buf; *q && !index("\t,;", *q); ) 959 *bp++ = *q++; 960 *bp = '\0'; 961 962 /* skip cruft */ 963 while (index(", ;", *q)) 964 q++; 965 966 /* decode priority name */ 967 if (*buf == '*') 968 pri = LOG_PRIMASK + 1; 969 else { 970 pri = decode(buf, prioritynames); 971 if (pri < 0) { 972 (void) sprintf(ebuf, 973 "unknown priority name \"%s\"", buf); 974 logerror(ebuf); 975 return; 976 } 977 } 978 979 /* scan facilities */ 980 while (*p && !index("\t.;", *p)) { 981 for (bp = buf; *p && !index("\t,;.", *p); ) 982 *bp++ = *p++; 983 *bp = '\0'; 984 if (*buf == '*') 985 for (i = 0; i < LOG_NFACILITIES; i++) 986 f->f_pmask[i] = pri; 987 else { 988 i = decode(buf, facilitynames); 989 if (i < 0) { 990 (void) sprintf(ebuf, 991 "unknown facility name \"%s\"", 992 buf); 993 logerror(ebuf); 994 return; 995 } 996 f->f_pmask[i >> 3] = pri; 997 } 998 while (*p == ',' || *p == ' ') 999 p++; 1000 } 1001 1002 p = q; 1003 } 1004 1005 /* skip to action part */ 1006 while (*p == '\t') 1007 p++; 1008 1009 switch (*p) 1010 { 1011 case '@': 1012 if (!InetInuse) 1013 break; 1014 (void) strcpy(f->f_un.f_forw.f_hname, ++p); 1015 hp = gethostbyname(p); 1016 if (hp == NULL) { 1017 extern int h_errno, h_nerr; 1018 extern char **h_errlist; 1019 1020 logerror((u_int)h_errno < h_nerr ? 1021 h_errlist[h_errno] : "Unknown error"); 1022 break; 1023 } 1024 bzero((char *) &f->f_un.f_forw.f_addr, 1025 sizeof f->f_un.f_forw.f_addr); 1026 f->f_un.f_forw.f_addr.sin_family = AF_INET; 1027 f->f_un.f_forw.f_addr.sin_port = LogPort; 1028 bcopy(hp->h_addr, (char *) &f->f_un.f_forw.f_addr.sin_addr, hp->h_length); 1029 f->f_type = F_FORW; 1030 break; 1031 1032 case '/': 1033 (void) strcpy(f->f_un.f_fname, p); 1034 if ((f->f_file = open(p, O_WRONLY|O_APPEND, 0)) < 0) { 1035 f->f_file = F_UNUSED; 1036 logerror(p); 1037 break; 1038 } 1039 if (isatty(f->f_file)) 1040 f->f_type = F_TTY; 1041 else 1042 f->f_type = F_FILE; 1043 if (strcmp(p, ctty) == 0) 1044 f->f_type = F_CONSOLE; 1045 break; 1046 1047 case '*': 1048 f->f_type = F_WALL; 1049 break; 1050 1051 default: 1052 for (i = 0; i < MAXUNAMES && *p; i++) { 1053 for (q = p; *q && *q != ','; ) 1054 q++; 1055 (void) strncpy(f->f_un.f_uname[i], p, UT_NAMESIZE); 1056 if ((q - p) > UT_NAMESIZE) 1057 f->f_un.f_uname[i][UT_NAMESIZE] = '\0'; 1058 else 1059 f->f_un.f_uname[i][q - p] = '\0'; 1060 while (*q == ',' || *q == ' ') 1061 q++; 1062 p = q; 1063 } 1064 f->f_type = F_USERS; 1065 break; 1066 } 1067 } 1068 1069 1070 /* 1071 * Decode a symbolic name to a numeric value 1072 */ 1073 1074 decode(name, codetab) 1075 char *name; 1076 CODE *codetab; 1077 { 1078 register CODE *c; 1079 register char *p; 1080 char buf[40]; 1081 1082 if (isdigit(*name)) 1083 return (atoi(name)); 1084 1085 (void) strcpy(buf, name); 1086 for (p = buf; *p; p++) 1087 if (isupper(*p)) 1088 *p = tolower(*p); 1089 for (c = codetab; c->c_name; c++) 1090 if (!strcmp(buf, c->c_name)) 1091 return (c->c_val); 1092 1093 return (-1); 1094 } 1095