1 /* $NetBSD: syslogd.c,v 1.57 2002/11/16 03:59:36 itojun Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1988, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 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 the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1983, 1988, 1993, 1994\n\ 39 The Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)syslogd.c 8.3 (Berkeley) 4/4/94"; 45 #else 46 __RCSID("$NetBSD: syslogd.c,v 1.57 2002/11/16 03:59:36 itojun Exp $"); 47 #endif 48 #endif /* not lint */ 49 50 /* 51 * syslogd -- log system messages 52 * 53 * This program implements a system log. It takes a series of lines. 54 * Each line may have a priority, signified as "<n>" as 55 * the first characters of the line. If this is 56 * not present, a default priority is used. 57 * 58 * To kill syslogd, send a signal 15 (terminate). A signal 1 (hup) will 59 * cause it to reread its configuration file. 60 * 61 * Defined Constants: 62 * 63 * MAXLINE -- the maximimum line length that can be handled. 64 * DEFUPRI -- the default priority for user messages 65 * DEFSPRI -- the default priority for kernel messages 66 * 67 * Author: Eric Allman 68 * extensive changes by Ralph Campbell 69 * more extensive changes by Eric Allman (again) 70 */ 71 72 #define MAXLINE 1024 /* maximum line length */ 73 #define MAXSVLINE 120 /* maximum saved line length */ 74 #define DEFUPRI (LOG_USER|LOG_NOTICE) 75 #define DEFSPRI (LOG_KERN|LOG_CRIT) 76 #define TIMERINTVL 30 /* interval for checking flush, mark */ 77 #define TTYMSGTIME 1 /* timeout passed to ttymsg */ 78 79 #include <sys/param.h> 80 #include <sys/socket.h> 81 #include <sys/sysctl.h> 82 #include <sys/types.h> 83 #include <sys/un.h> 84 #include <sys/wait.h> 85 86 #include <netinet/in.h> 87 88 #include <ctype.h> 89 #include <errno.h> 90 #include <fcntl.h> 91 #include <grp.h> 92 #include <locale.h> 93 #include <netdb.h> 94 #include <poll.h> 95 #include <pwd.h> 96 #include <signal.h> 97 #include <stdarg.h> 98 #include <stdio.h> 99 #include <stdlib.h> 100 #include <string.h> 101 #include <unistd.h> 102 #include <util.h> 103 104 #include "utmpentry.h" 105 #include "pathnames.h" 106 107 #define SYSLOG_NAMES 108 #include <sys/syslog.h> 109 110 #ifdef LIBWRAP 111 #include <tcpd.h> 112 113 int allow_severity = LOG_AUTH|LOG_INFO; 114 int deny_severity = LOG_AUTH|LOG_WARNING; 115 #endif 116 117 char *ConfFile = _PATH_LOGCONF; 118 char ctty[] = _PATH_CONSOLE; 119 120 #define FDMASK(fd) (1 << (fd)) 121 122 #define dprintf if (Debug) printf 123 124 #define MAXUNAMES 20 /* maximum number of user names */ 125 126 /* 127 * Flags to logmsg(). 128 */ 129 130 #define IGN_CONS 0x001 /* don't print on console */ 131 #define SYNC_FILE 0x002 /* do fsync on file after printing */ 132 #define ADDDATE 0x004 /* add a date to the message */ 133 #define MARK 0x008 /* this message is a mark */ 134 135 /* 136 * This structure represents the files that will have log 137 * copies printed. 138 */ 139 140 struct filed { 141 struct filed *f_next; /* next in linked list */ 142 short f_type; /* entry type, see below */ 143 short f_file; /* file descriptor */ 144 time_t f_time; /* time this was last written */ 145 u_char f_pmask[LOG_NFACILITIES+1]; /* priority mask */ 146 union { 147 char f_uname[MAXUNAMES][UT_NAMESIZE+1]; 148 struct { 149 char f_hname[MAXHOSTNAMELEN+1]; 150 struct addrinfo *f_addr; 151 } f_forw; /* forwarding address */ 152 char f_fname[MAXPATHLEN]; 153 } f_un; 154 char f_prevline[MAXSVLINE]; /* last message logged */ 155 char f_lasttime[16]; /* time of last occurrence */ 156 char f_prevhost[MAXHOSTNAMELEN+1]; /* host from which recd. */ 157 int f_prevpri; /* pri of f_prevline */ 158 int f_prevlen; /* length of f_prevline */ 159 int f_prevcount; /* repetition cnt of prevline */ 160 int f_repeatcount; /* number of "repeated" msgs */ 161 }; 162 163 /* 164 * Intervals at which we flush out "message repeated" messages, 165 * in seconds after previous message is logged. After each flush, 166 * we move to the next interval until we reach the largest. 167 */ 168 int repeatinterval[] = { 30, 120, 600 }; /* # of secs before flush */ 169 #define MAXREPEAT ((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1) 170 #define REPEATTIME(f) ((f)->f_time + repeatinterval[(f)->f_repeatcount]) 171 #define BACKOFF(f) { if (++(f)->f_repeatcount > MAXREPEAT) \ 172 (f)->f_repeatcount = MAXREPEAT; \ 173 } 174 175 /* values for f_type */ 176 #define F_UNUSED 0 /* unused entry */ 177 #define F_FILE 1 /* regular file */ 178 #define F_TTY 2 /* terminal */ 179 #define F_CONSOLE 3 /* console terminal */ 180 #define F_FORW 4 /* remote machine */ 181 #define F_USERS 5 /* list of users */ 182 #define F_WALL 6 /* everyone logged on */ 183 184 char *TypeNames[7] = { 185 "UNUSED", "FILE", "TTY", "CONSOLE", 186 "FORW", "USERS", "WALL" 187 }; 188 189 struct filed *Files; 190 struct filed consfile; 191 192 int Debug; /* debug flag */ 193 int daemonized = 0; /* we are not daemonized yet */ 194 char LocalHostName[MAXHOSTNAMELEN+1]; /* our hostname */ 195 char *LocalDomain; /* our local domain name */ 196 int *finet = NULL; /* Internet datagram sockets */ 197 int Initialized = 0; /* set when we have initialized ourselves */ 198 int MarkInterval = 20 * 60; /* interval between marks in seconds */ 199 int MarkSeq = 0; /* mark sequence number */ 200 int SecureMode = 0; /* listen only on unix domain socks */ 201 int UseNameService = 1; /* make domain name queries */ 202 int NumForwards = 0; /* number of forwarding actions in conf file */ 203 char **LogPaths; /* array of pathnames to read messages from */ 204 205 void cfline(char *, struct filed *); 206 char *cvthname(struct sockaddr_storage *); 207 int decode(const char *, CODE *); 208 void die(int); 209 void domark(int); 210 void fprintlog(struct filed *, int, char *); 211 int getmsgbufsize(void); 212 int* socksetup(int); 213 void init(int); 214 void logerror(const char *, ...); 215 void logmsg(int, char *, char *, int); 216 void printline(char *, char *); 217 void printsys(char *); 218 void reapchild(int); 219 void usage(void); 220 void wallmsg(struct filed *, struct iovec *); 221 int main(int, char *[]); 222 void logpath_add(char ***, int *, int *, char *); 223 void logpath_fileadd(char ***, int *, int *, char *); 224 225 int 226 main(int argc, char *argv[]) 227 { 228 int ch, *funix, i, j, fklog, len, linesize; 229 int *nfinetix, nfklogix, nfunixbaseix, nfds; 230 int funixsize = 0, funixmaxsize = 0; 231 struct sockaddr_un sunx, fromunix; 232 struct sockaddr_storage frominet; 233 char *p, *line, **pp; 234 struct pollfd *readfds; 235 uid_t uid = 0; 236 gid_t gid = 0; 237 char *user = NULL; 238 char *group = NULL; 239 char *root = "/"; 240 char *endp; 241 struct group *gr; 242 struct passwd *pw; 243 unsigned long l; 244 245 (void)setlocale(LC_ALL, ""); 246 247 while ((ch = getopt(argc, argv, "dnsf:m:p:P:u:g:t:")) != -1) 248 switch(ch) { 249 case 'd': /* debug */ 250 Debug++; 251 break; 252 case 'f': /* configuration file */ 253 ConfFile = optarg; 254 break; 255 case 'g': 256 group = optarg; 257 if (*group == '\0') 258 usage(); 259 break; 260 case 'm': /* mark interval */ 261 MarkInterval = atoi(optarg) * 60; 262 break; 263 case 'n': /* turn off DNS queries */ 264 UseNameService = 0; 265 break; 266 case 'p': /* path */ 267 logpath_add(&LogPaths, &funixsize, 268 &funixmaxsize, optarg); 269 break; 270 case 'P': /* file of paths */ 271 logpath_fileadd(&LogPaths, &funixsize, 272 &funixmaxsize, optarg); 273 break; 274 case 's': /* no network listen mode */ 275 SecureMode++; 276 break; 277 case 't': 278 root = optarg; 279 if (*root == '\0') 280 usage(); 281 break; 282 case 'u': 283 user = optarg; 284 if (*user == '\0') 285 usage(); 286 break; 287 case '?': 288 default: 289 usage(); 290 } 291 if ((argc -= optind) != 0) 292 usage(); 293 294 setlinebuf(stdout); 295 296 if (user != NULL) { 297 if (isdigit((unsigned char)*user)) { 298 errno = 0; 299 endp = NULL; 300 l = strtoul(user, &endp, 0); 301 if (errno || *endp != '\0') 302 goto getuser; 303 uid = (uid_t)l; 304 if (uid != l) { 305 errno = 0; 306 logerror("UID out of range"); 307 die(0); 308 } 309 } else { 310 getuser: 311 if ((pw = getpwnam(user)) != NULL) { 312 uid = pw->pw_uid; 313 } else { 314 errno = 0; 315 logerror("Cannot find user `%s'", user); 316 die (0); 317 } 318 } 319 } 320 321 if (group != NULL) { 322 if (isdigit((unsigned char)*group)) { 323 errno = 0; 324 endp = NULL; 325 l = strtoul(group, &endp, 0); 326 if (errno || *endp != '\0') 327 goto getgroup; 328 gid = (gid_t)l; 329 if (gid != l) { 330 errno = 0; 331 logerror("GID out of range"); 332 die(0); 333 } 334 } else { 335 getgroup: 336 if ((gr = getgrnam(group)) != NULL) { 337 gid = gr->gr_gid; 338 } else { 339 errno = 0; 340 logerror("Cannot find group `%s'", group); 341 die(0); 342 } 343 } 344 } 345 346 if (access (root, F_OK | R_OK)) { 347 logerror("Cannot access `%s'", root); 348 die (0); 349 } 350 351 consfile.f_type = F_CONSOLE; 352 (void)strcpy(consfile.f_un.f_fname, ctty); 353 (void)gethostname(LocalHostName, sizeof(LocalHostName)); 354 LocalHostName[sizeof(LocalHostName) - 1] = '\0'; 355 if ((p = strchr(LocalHostName, '.')) != NULL) { 356 *p++ = '\0'; 357 LocalDomain = p; 358 } else 359 LocalDomain = ""; 360 linesize = getmsgbufsize(); 361 if (linesize < MAXLINE) 362 linesize = MAXLINE; 363 linesize++; 364 line = malloc(linesize); 365 if (line == NULL) { 366 logerror("Couldn't allocate line buffer"); 367 die(0); 368 } 369 (void)signal(SIGTERM, die); 370 (void)signal(SIGINT, Debug ? die : SIG_IGN); 371 (void)signal(SIGQUIT, Debug ? die : SIG_IGN); 372 (void)signal(SIGCHLD, reapchild); 373 (void)signal(SIGALRM, domark); 374 (void)alarm(TIMERINTVL); 375 376 #ifndef SUN_LEN 377 #define SUN_LEN(unp) (strlen((unp)->sun_path) + 2) 378 #endif 379 if (funixsize == 0) 380 logpath_add(&LogPaths, &funixsize, 381 &funixmaxsize, _PATH_LOG); 382 funix = (int *)malloc(sizeof(int) * funixsize); 383 if (funix == NULL) { 384 logerror("Couldn't allocate funix descriptors"); 385 die(0); 386 } 387 for (j = 0, pp = LogPaths; *pp; pp++, j++) { 388 dprintf("Making unix dgram socket `%s'\n", *pp); 389 unlink(*pp); 390 memset(&sunx, 0, sizeof(sunx)); 391 sunx.sun_family = AF_LOCAL; 392 (void)strncpy(sunx.sun_path, *pp, sizeof(sunx.sun_path)); 393 funix[j] = socket(AF_LOCAL, SOCK_DGRAM, 0); 394 if (funix[j] < 0 || bind(funix[j], 395 (struct sockaddr *)&sunx, SUN_LEN(&sunx)) < 0 || 396 chmod(*pp, 0666) < 0) { 397 logerror("Cannot create `%s'", *pp); 398 die(0); 399 } 400 dprintf("Listening on unix dgram socket `%s'\n", *pp); 401 } 402 403 init(0); 404 405 if ((fklog = open(_PATH_KLOG, O_RDONLY, 0)) < 0) { 406 dprintf("Can't open `%s' (%d)\n", _PATH_KLOG, errno); 407 } else { 408 dprintf("Listening on kernel log `%s'\n", _PATH_KLOG); 409 } 410 411 dprintf("Off & running....\n"); 412 413 (void)signal(SIGHUP, init); 414 415 /* setup pollfd set. */ 416 readfds = (struct pollfd *)malloc(sizeof(struct pollfd) * 417 (funixsize + (finet ? *finet : 0) + 1)); 418 if (readfds == NULL) { 419 logerror("Couldn't allocate pollfds"); 420 die(0); 421 } 422 nfds = 0; 423 if (fklog >= 0) { 424 nfklogix = nfds++; 425 readfds[nfklogix].fd = fklog; 426 readfds[nfklogix].events = POLLIN | POLLPRI; 427 } 428 if (finet && !SecureMode) { 429 nfinetix = malloc(*finet * sizeof(*nfinetix)); 430 for (j = 0; j < *finet; j++) { 431 nfinetix[j] = nfds++; 432 readfds[nfinetix[j]].fd = finet[j+1]; 433 readfds[nfinetix[j]].events = POLLIN | POLLPRI; 434 } 435 } 436 nfunixbaseix = nfds; 437 for (j = 0, pp = LogPaths; *pp; pp++) { 438 readfds[nfds].fd = funix[j++]; 439 readfds[nfds++].events = POLLIN | POLLPRI; 440 } 441 442 /* 443 * All files are open, we can drop privileges and chroot 444 */ 445 dprintf("Attempt to chroot to `%s'\n", root); 446 if (chroot(root)) { 447 logerror("Failed to chroot to `%s'", root); 448 die(0); 449 } 450 dprintf("Attempt to set GID/EGID to `%d'\n", gid); 451 if (setgid(gid) || setegid(gid)) { 452 logerror("Failed to set gid to `%d'", gid); 453 die(0); 454 } 455 dprintf("Attempt to set UID/EUID to `%d'\n", uid); 456 if (setuid(uid) || seteuid(uid)) { 457 logerror("Failed to set uid to `%d'", uid); 458 die(0); 459 } 460 461 /* 462 * We cannot detach from the terminal before we are sure we won't 463 * have a fatal error, because error message would not go to the 464 * terminal and would not be logged because syslogd dies. 465 * All die() calls are behind us, we can call daemon() 466 */ 467 if (!Debug) { 468 (void)daemon(0, 0); 469 daemonized = 1; 470 471 /* tuck my process id away, if i'm not in debug mode */ 472 pidfile(NULL); 473 } 474 475 for (;;) { 476 int rv; 477 478 rv = poll(readfds, nfds, INFTIM); 479 if (rv == 0) 480 continue; 481 if (rv < 0) { 482 if (errno != EINTR) 483 logerror("poll() failed"); 484 continue; 485 } 486 dprintf("Got a message (%d)\n", rv); 487 if (fklog >= 0 && 488 (readfds[nfklogix].revents & (POLLIN | POLLPRI))) { 489 dprintf("Kernel log active\n"); 490 i = read(fklog, line, linesize - 1); 491 if (i > 0) { 492 line[i] = '\0'; 493 printsys(line); 494 } else if (i < 0 && errno != EINTR) { 495 logerror("klog failed"); 496 fklog = -1; 497 } 498 } 499 for (j = 0, pp = LogPaths; *pp; pp++, j++) { 500 if ((readfds[nfunixbaseix + j].revents & 501 (POLLIN | POLLPRI)) == 0) 502 continue; 503 504 dprintf("Unix socket (%s) active\n", *pp); 505 len = sizeof(fromunix); 506 i = recvfrom(funix[j], line, MAXLINE, 0, 507 (struct sockaddr *)&fromunix, &len); 508 if (i > 0) { 509 line[i] = '\0'; 510 printline(LocalHostName, line); 511 } else if (i < 0 && errno != EINTR) { 512 logerror("recvfrom() unix `%s'", *pp); 513 } 514 } 515 if (finet && !SecureMode) { 516 for (j = 0; j < *finet; j++) { 517 if (readfds[nfinetix[j]].revents & 518 (POLLIN | POLLPRI)) { 519 #ifdef LIBWRAP 520 struct request_info req; 521 #endif 522 int reject = 0; 523 524 dprintf("inet socket active\n"); 525 526 #ifdef LIBWRAP 527 request_init(&req, RQ_DAEMON, "syslogd", 528 RQ_FILE, finet[j + 1], NULL); 529 fromhost(&req); 530 reject = !hosts_access(&req); 531 if (reject) 532 dprintf("access denied\n"); 533 #endif 534 535 len = sizeof(frominet); 536 i = recvfrom(finet[j+1], line, MAXLINE, 537 0, (struct sockaddr *)&frominet, 538 &len); 539 if (i == 0 || (i < 0 && errno == EINTR)) 540 continue; 541 else if (i < 0) { 542 logerror("recvfrom inet"); 543 continue; 544 } 545 546 line[i] = '\0'; 547 if (!reject) 548 printline(cvthname(&frominet), 549 line); 550 } 551 } 552 } 553 } 554 } 555 556 void 557 usage(void) 558 { 559 560 (void)fprintf(stderr, 561 "usage: %s [-dns] [-f config_file] [-g group] [-m mark_interval]\n" 562 "\t[-P file_list] [-p log_socket [-p log_socket2 ...]]\n" 563 "\t[-t chroot_dir] [-u user]\n", getprogname()); 564 exit(1); 565 } 566 567 /* 568 * given a pointer to an array of char *'s, a pointer to it's current 569 * size and current allocated max size, and a new char * to add, add 570 * it, update everything as necessary, possibly allocating a new array 571 */ 572 void 573 logpath_add(char ***lp, int *szp, int *maxszp, char *new) 574 { 575 576 dprintf("Adding `%s' to the %p logpath list\n", new, *lp); 577 if (*szp == *maxszp) { 578 if (*maxszp == 0) { 579 *maxszp = 4; /* start of with enough for now */ 580 *lp = NULL; 581 } else 582 *maxszp *= 2; 583 *lp = realloc(*lp, sizeof(char *) * (*maxszp + 1)); 584 if (*lp == NULL) { 585 logerror("Couldn't allocate line buffer"); 586 die(0); 587 } 588 } 589 if (((*lp)[(*szp)++] = strdup(new)) == NULL) { 590 logerror("Couldn't allocate logpath"); 591 die(0); 592 } 593 (*lp)[(*szp)] = NULL; /* always keep it NULL terminated */ 594 } 595 596 /* do a file of log sockets */ 597 void 598 logpath_fileadd(char ***lp, int *szp, int *maxszp, char *file) 599 { 600 FILE *fp; 601 char *line; 602 size_t len; 603 604 fp = fopen(file, "r"); 605 if (fp == NULL) { 606 logerror("Could not open socket file list `%s'", file); 607 die(0); 608 } 609 610 while ((line = fgetln(fp, &len))) { 611 line[len - 1] = 0; 612 logpath_add(lp, szp, maxszp, line); 613 } 614 fclose(fp); 615 } 616 617 /* 618 * Take a raw input line, decode the message, and print the message 619 * on the appropriate log files. 620 */ 621 void 622 printline(char *hname, char *msg) 623 { 624 int c, pri; 625 char *p, *q, line[MAXLINE + 1]; 626 627 /* test for special codes */ 628 pri = DEFUPRI; 629 p = msg; 630 if (*p == '<') { 631 pri = 0; 632 while (isdigit(*++p)) 633 pri = 10 * pri + (*p - '0'); 634 if (*p == '>') 635 ++p; 636 } 637 if (pri &~ (LOG_FACMASK|LOG_PRIMASK)) 638 pri = DEFUPRI; 639 640 /* don't allow users to log kernel messages */ 641 if (LOG_FAC(pri) == LOG_KERN) 642 pri = LOG_MAKEPRI(LOG_USER, LOG_PRI(pri)); 643 644 q = line; 645 646 while ((c = *p++) != '\0' && 647 q < &line[sizeof(line) - 2]) { 648 c &= 0177; 649 if (iscntrl(c)) 650 if (c == '\n') 651 *q++ = ' '; 652 else if (c == '\t') 653 *q++ = '\t'; 654 else { 655 *q++ = '^'; 656 *q++ = c ^ 0100; 657 } 658 else 659 *q++ = c; 660 } 661 *q = '\0'; 662 663 logmsg(pri, line, hname, 0); 664 } 665 666 /* 667 * Take a raw input line from /dev/klog, split and format similar to syslog(). 668 */ 669 void 670 printsys(char *msg) 671 { 672 int c, pri, flags; 673 char *lp, *p, *q, line[MAXLINE + 1]; 674 675 (void)strcpy(line, _PATH_UNIX); 676 (void)strcat(line, ": "); 677 lp = line + strlen(line); 678 for (p = msg; *p != '\0'; ) { 679 flags = SYNC_FILE | ADDDATE; /* fsync file after write */ 680 pri = DEFSPRI; 681 if (*p == '<') { 682 pri = 0; 683 while (isdigit(*++p)) 684 pri = 10 * pri + (*p - '0'); 685 if (*p == '>') 686 ++p; 687 } else { 688 /* kernel printf's come out on console */ 689 flags |= IGN_CONS; 690 } 691 if (pri &~ (LOG_FACMASK|LOG_PRIMASK)) 692 pri = DEFSPRI; 693 q = lp; 694 while (*p != '\0' && (c = *p++) != '\n' && 695 q < &line[MAXLINE]) 696 *q++ = c; 697 *q = '\0'; 698 logmsg(pri, line, LocalHostName, flags); 699 } 700 } 701 702 time_t now; 703 704 /* 705 * Log a message to the appropriate log files, users, etc. based on 706 * the priority. 707 */ 708 void 709 logmsg(int pri, char *msg, char *from, int flags) 710 { 711 struct filed *f; 712 int fac, msglen, omask, prilev; 713 char *timestamp; 714 715 dprintf("logmsg: pri 0%o, flags 0x%x, from %s, msg %s\n", 716 pri, flags, from, msg); 717 718 omask = sigblock(sigmask(SIGHUP)|sigmask(SIGALRM)); 719 720 /* 721 * Check to see if msg looks non-standard. 722 */ 723 msglen = strlen(msg); 724 if (msglen < 16 || msg[3] != ' ' || msg[6] != ' ' || 725 msg[9] != ':' || msg[12] != ':' || msg[15] != ' ') 726 flags |= ADDDATE; 727 728 (void)time(&now); 729 if (flags & ADDDATE) 730 timestamp = ctime(&now) + 4; 731 else { 732 timestamp = msg; 733 msg += 16; 734 msglen -= 16; 735 } 736 737 /* extract facility and priority level */ 738 if (flags & MARK) 739 fac = LOG_NFACILITIES; 740 else 741 fac = LOG_FAC(pri); 742 prilev = LOG_PRI(pri); 743 744 /* log the message to the particular outputs */ 745 if (!Initialized) { 746 f = &consfile; 747 f->f_file = open(ctty, O_WRONLY, 0); 748 749 if (f->f_file >= 0) { 750 fprintlog(f, flags, msg); 751 (void)close(f->f_file); 752 } 753 (void)sigsetmask(omask); 754 return; 755 } 756 for (f = Files; f; f = f->f_next) { 757 /* skip messages that are incorrect priority */ 758 if (f->f_pmask[fac] < prilev || 759 f->f_pmask[fac] == INTERNAL_NOPRI) 760 continue; 761 762 if (f->f_type == F_CONSOLE && (flags & IGN_CONS)) 763 continue; 764 765 /* don't output marks to recently written files */ 766 if ((flags & MARK) && (now - f->f_time) < MarkInterval / 2) 767 continue; 768 769 /* 770 * suppress duplicate lines to this file 771 */ 772 if ((flags & MARK) == 0 && msglen == f->f_prevlen && 773 !strcmp(msg, f->f_prevline) && 774 !strcmp(from, f->f_prevhost)) { 775 (void)strncpy(f->f_lasttime, timestamp, 15); 776 f->f_prevcount++; 777 dprintf("Msg repeated %d times, %ld sec of %d\n", 778 f->f_prevcount, (long)(now - f->f_time), 779 repeatinterval[f->f_repeatcount]); 780 /* 781 * If domark would have logged this by now, 782 * flush it now (so we don't hold isolated messages), 783 * but back off so we'll flush less often 784 * in the future. 785 */ 786 if (now > REPEATTIME(f)) { 787 fprintlog(f, flags, (char *)NULL); 788 BACKOFF(f); 789 } 790 } else { 791 /* new line, save it */ 792 if (f->f_prevcount) 793 fprintlog(f, 0, (char *)NULL); 794 f->f_repeatcount = 0; 795 f->f_prevpri = pri; 796 (void)strncpy(f->f_lasttime, timestamp, 15); 797 (void)strncpy(f->f_prevhost, from, 798 sizeof(f->f_prevhost)); 799 if (msglen < MAXSVLINE) { 800 f->f_prevlen = msglen; 801 (void)strcpy(f->f_prevline, msg); 802 fprintlog(f, flags, (char *)NULL); 803 } else { 804 f->f_prevline[0] = 0; 805 f->f_prevlen = 0; 806 fprintlog(f, flags, msg); 807 } 808 } 809 } 810 (void)sigsetmask(omask); 811 } 812 813 void 814 fprintlog(struct filed *f, int flags, char *msg) 815 { 816 struct iovec iov[6]; 817 struct iovec *v; 818 struct addrinfo *r; 819 int j, l, lsent; 820 char line[MAXLINE + 1], repbuf[80], greetings[200]; 821 822 v = iov; 823 if (f->f_type == F_WALL) { 824 v->iov_base = greetings; 825 v->iov_len = snprintf(greetings, sizeof greetings, 826 "\r\n\7Message from syslogd@%s at %.24s ...\r\n", 827 f->f_prevhost, ctime(&now)); 828 v++; 829 v->iov_base = ""; 830 v->iov_len = 0; 831 v++; 832 } else { 833 v->iov_base = f->f_lasttime; 834 v->iov_len = 15; 835 v++; 836 v->iov_base = " "; 837 v->iov_len = 1; 838 v++; 839 } 840 v->iov_base = f->f_prevhost; 841 v->iov_len = strlen(v->iov_base); 842 v++; 843 v->iov_base = " "; 844 v->iov_len = 1; 845 v++; 846 847 if (msg) { 848 v->iov_base = msg; 849 v->iov_len = strlen(msg); 850 } else if (f->f_prevcount > 1) { 851 v->iov_base = repbuf; 852 v->iov_len = snprintf(repbuf, sizeof repbuf, 853 "last message repeated %d times", f->f_prevcount); 854 } else { 855 v->iov_base = f->f_prevline; 856 v->iov_len = f->f_prevlen; 857 } 858 v++; 859 860 dprintf("Logging to %s", TypeNames[f->f_type]); 861 f->f_time = now; 862 863 switch (f->f_type) { 864 case F_UNUSED: 865 dprintf("\n"); 866 break; 867 868 case F_FORW: 869 dprintf(" %s\n", f->f_un.f_forw.f_hname); 870 /* 871 * check for local vs remote messages 872 * (from FreeBSD PR#bin/7055) 873 */ 874 if (strcmp(f->f_prevhost, LocalHostName)) { 875 l = snprintf(line, sizeof(line) - 1, 876 "<%d>%.15s [%s]: %s", 877 f->f_prevpri, (char *) iov[0].iov_base, 878 f->f_prevhost, (char *) iov[4].iov_base); 879 } else { 880 l = snprintf(line, sizeof(line) - 1, "<%d>%.15s %s", 881 f->f_prevpri, (char *) iov[0].iov_base, 882 (char *) iov[4].iov_base); 883 } 884 if (l > MAXLINE) 885 l = MAXLINE; 886 if (finet) { 887 for (r = f->f_un.f_forw.f_addr; r; r = r->ai_next) { 888 for (j = 0; j < *finet; j++) { 889 #if 0 890 /* 891 * should we check AF first, or just 892 * trial and error? FWD 893 */ 894 if (r->ai_family == 895 address_family_of(finet[j+1])) 896 #endif 897 lsent = sendto(finet[j+1], line, l, 0, 898 r->ai_addr, r->ai_addrlen); 899 if (lsent == l) 900 break; 901 } 902 } 903 if (lsent != l) { 904 f->f_type = F_UNUSED; 905 logerror("sendto() failed"); 906 } 907 } 908 break; 909 910 case F_CONSOLE: 911 if (flags & IGN_CONS) { 912 dprintf(" (ignored)\n"); 913 break; 914 } 915 /* FALLTHROUGH */ 916 917 case F_TTY: 918 case F_FILE: 919 dprintf(" %s\n", f->f_un.f_fname); 920 if (f->f_type != F_FILE) { 921 v->iov_base = "\r\n"; 922 v->iov_len = 2; 923 } else { 924 v->iov_base = "\n"; 925 v->iov_len = 1; 926 } 927 again: 928 if (writev(f->f_file, iov, 6) < 0) { 929 int e = errno; 930 (void)close(f->f_file); 931 /* 932 * Check for errors on TTY's due to loss of tty 933 */ 934 if ((e == EIO || e == EBADF) && f->f_type != F_FILE) { 935 f->f_file = open(f->f_un.f_fname, 936 O_WRONLY|O_APPEND, 0); 937 if (f->f_file < 0) { 938 f->f_type = F_UNUSED; 939 logerror(f->f_un.f_fname); 940 } else 941 goto again; 942 } else { 943 f->f_type = F_UNUSED; 944 errno = e; 945 logerror(f->f_un.f_fname); 946 } 947 } else if (flags & SYNC_FILE) 948 (void)fsync(f->f_file); 949 break; 950 951 case F_USERS: 952 case F_WALL: 953 dprintf("\n"); 954 v->iov_base = "\r\n"; 955 v->iov_len = 2; 956 wallmsg(f, iov); 957 break; 958 } 959 f->f_prevcount = 0; 960 } 961 962 /* 963 * WALLMSG -- Write a message to the world at large 964 * 965 * Write the specified message to either the entire 966 * world, or a list of approved users. 967 */ 968 void 969 wallmsg(struct filed *f, struct iovec *iov) 970 { 971 static int reenter; /* avoid calling ourselves */ 972 int i; 973 char *p; 974 static struct utmpentry *ohead = NULL; 975 struct utmpentry *ep; 976 977 if (reenter++) 978 return; 979 980 (void)getutentries(NULL, &ep); 981 if (ep != ohead) { 982 freeutentries(ohead); 983 ohead = ep; 984 } 985 /* NOSTRICT */ 986 for (; ep; ep = ep->next) { 987 if (f->f_type == F_WALL) { 988 if ((p = ttymsg(iov, 6, ep->line, TTYMSGTIME)) 989 != NULL) { 990 errno = 0; /* already in msg */ 991 logerror(p); 992 } 993 continue; 994 } 995 /* should we send the message to this user? */ 996 for (i = 0; i < MAXUNAMES; i++) { 997 if (!f->f_un.f_uname[i][0]) 998 break; 999 if (strcmp(f->f_un.f_uname[i], ep->name) == 0) { 1000 if ((p = ttymsg(iov, 6, ep->line, TTYMSGTIME)) 1001 != NULL) { 1002 errno = 0; /* already in msg */ 1003 logerror(p); 1004 } 1005 break; 1006 } 1007 } 1008 } 1009 reenter = 0; 1010 } 1011 1012 void 1013 reapchild(int signo) 1014 { 1015 union wait status; 1016 1017 while (wait3((int *)&status, WNOHANG, (struct rusage *)NULL) > 0) 1018 ; 1019 } 1020 1021 /* 1022 * Return a printable representation of a host address. 1023 */ 1024 char * 1025 cvthname(struct sockaddr_storage *f) 1026 { 1027 int error; 1028 char *p; 1029 const int niflag = NI_DGRAM; 1030 static char host[NI_MAXHOST], ip[NI_MAXHOST]; 1031 1032 error = getnameinfo((struct sockaddr*)f, ((struct sockaddr*)f)->sa_len, 1033 ip, sizeof ip, NULL, 0, NI_NUMERICHOST|niflag); 1034 1035 dprintf("cvthname(%s)\n", ip); 1036 1037 if (error) { 1038 dprintf("Malformed from address %s\n", gai_strerror(error)); 1039 return ("???"); 1040 } 1041 1042 if (!UseNameService) 1043 return (ip); 1044 1045 error = getnameinfo((struct sockaddr*)f, ((struct sockaddr*)f)->sa_len, 1046 host, sizeof host, NULL, 0, niflag); 1047 if (error) { 1048 dprintf("Host name for your address (%s) unknown\n", ip); 1049 return (ip); 1050 } 1051 if ((p = strchr(host, '.')) && strcmp(p + 1, LocalDomain) == 0) 1052 *p = '\0'; 1053 return (host); 1054 } 1055 1056 void 1057 domark(int signo) 1058 { 1059 struct filed *f; 1060 1061 now = time((time_t *)NULL); 1062 MarkSeq += TIMERINTVL; 1063 if (MarkSeq >= MarkInterval) { 1064 logmsg(LOG_INFO, "-- MARK --", LocalHostName, ADDDATE|MARK); 1065 MarkSeq = 0; 1066 } 1067 1068 for (f = Files; f; f = f->f_next) { 1069 if (f->f_prevcount && now >= REPEATTIME(f)) { 1070 dprintf("Flush %s: repeated %d times, %d sec.\n", 1071 TypeNames[f->f_type], f->f_prevcount, 1072 repeatinterval[f->f_repeatcount]); 1073 fprintlog(f, 0, (char *)NULL); 1074 BACKOFF(f); 1075 } 1076 } 1077 (void)alarm(TIMERINTVL); 1078 } 1079 1080 /* 1081 * Print syslogd errors some place. 1082 */ 1083 void 1084 logerror(const char *fmt, ...) 1085 { 1086 va_list ap; 1087 char tmpbuf[BUFSIZ]; 1088 char buf[BUFSIZ]; 1089 1090 va_start(ap, fmt); 1091 1092 (void)vsnprintf(tmpbuf, sizeof(tmpbuf), fmt, ap); 1093 1094 va_end(ap); 1095 1096 if (errno) 1097 (void)snprintf(buf, sizeof(buf), "syslogd: %s: %s", 1098 tmpbuf, strerror(errno)); 1099 else 1100 (void)snprintf(buf, sizeof(buf), "syslogd: %s", tmpbuf); 1101 1102 if (daemonized) 1103 logmsg(LOG_SYSLOG|LOG_ERR, buf, LocalHostName, ADDDATE); 1104 if (!daemonized && Debug) 1105 dprintf("%s\n", buf); 1106 if (!daemonized && !Debug) 1107 printf("%s\n", buf); 1108 1109 return; 1110 } 1111 1112 void 1113 die(int signo) 1114 { 1115 struct filed *f; 1116 char **p; 1117 1118 for (f = Files; f != NULL; f = f->f_next) { 1119 /* flush any pending output */ 1120 if (f->f_prevcount) 1121 fprintlog(f, 0, (char *)NULL); 1122 } 1123 errno = 0; 1124 if (signo) 1125 logerror("Exiting on signal %d", signo); 1126 else 1127 logerror("Fatal error, exiting"); 1128 for (p = LogPaths; p && *p; p++) 1129 unlink(*p); 1130 exit(0); 1131 } 1132 1133 /* 1134 * INIT -- Initialize syslogd from configuration table 1135 */ 1136 void 1137 init(int signo) 1138 { 1139 int i; 1140 FILE *cf; 1141 struct filed *f, *next, **nextp; 1142 char *p; 1143 char cline[LINE_MAX]; 1144 1145 dprintf("init\n"); 1146 1147 /* 1148 * Close all open log files. 1149 */ 1150 Initialized = 0; 1151 for (f = Files; f != NULL; f = next) { 1152 /* flush any pending output */ 1153 if (f->f_prevcount) 1154 fprintlog(f, 0, (char *)NULL); 1155 1156 switch (f->f_type) { 1157 case F_FILE: 1158 case F_TTY: 1159 case F_CONSOLE: 1160 (void)close(f->f_file); 1161 break; 1162 case F_FORW: 1163 if (f->f_un.f_forw.f_addr) 1164 freeaddrinfo(f->f_un.f_forw.f_addr); 1165 break; 1166 } 1167 next = f->f_next; 1168 free((char *)f); 1169 } 1170 Files = NULL; 1171 nextp = &Files; 1172 1173 /* 1174 * Close all open sockets 1175 */ 1176 1177 if (finet) { 1178 for (i = 0; i < *finet; i++) { 1179 if (close(finet[i+1]) < 0) { 1180 logerror("close() failed"); 1181 die(0); 1182 } 1183 } 1184 } 1185 1186 /* 1187 * Reset counter of forwarding actions 1188 */ 1189 1190 NumForwards=0; 1191 1192 /* open the configuration file */ 1193 if ((cf = fopen(ConfFile, "r")) == NULL) { 1194 dprintf("Cannot open `%s'\n", ConfFile); 1195 *nextp = (struct filed *)calloc(1, sizeof(*f)); 1196 cfline("*.ERR\t/dev/console", *nextp); 1197 (*nextp)->f_next = (struct filed *)calloc(1, sizeof(*f)); 1198 cfline("*.PANIC\t*", (*nextp)->f_next); 1199 Initialized = 1; 1200 return; 1201 } 1202 1203 /* 1204 * Foreach line in the conf table, open that file. 1205 */ 1206 f = NULL; 1207 while (fgets(cline, sizeof(cline), cf) != NULL) { 1208 /* 1209 * check for end-of-section, comments, strip off trailing 1210 * spaces and newline character. 1211 */ 1212 for (p = cline; isspace(*p); ++p) 1213 continue; 1214 if (*p == '\0' || *p == '#') 1215 continue; 1216 for (p = strchr(cline, '\0'); isspace(*--p);) 1217 continue; 1218 *++p = '\0'; 1219 f = (struct filed *)calloc(1, sizeof(*f)); 1220 *nextp = f; 1221 nextp = &f->f_next; 1222 cfline(cline, f); 1223 } 1224 1225 /* close the configuration file */ 1226 (void)fclose(cf); 1227 1228 Initialized = 1; 1229 1230 if (Debug) { 1231 for (f = Files; f; f = f->f_next) { 1232 for (i = 0; i <= LOG_NFACILITIES; i++) 1233 if (f->f_pmask[i] == INTERNAL_NOPRI) 1234 printf("X "); 1235 else 1236 printf("%d ", f->f_pmask[i]); 1237 printf("%s: ", TypeNames[f->f_type]); 1238 switch (f->f_type) { 1239 case F_FILE: 1240 case F_TTY: 1241 case F_CONSOLE: 1242 printf("%s", f->f_un.f_fname); 1243 break; 1244 1245 case F_FORW: 1246 printf("%s", f->f_un.f_forw.f_hname); 1247 break; 1248 1249 case F_USERS: 1250 for (i = 0; 1251 i < MAXUNAMES && *f->f_un.f_uname[i]; i++) 1252 printf("%s, ", f->f_un.f_uname[i]); 1253 break; 1254 } 1255 printf("\n"); 1256 } 1257 } 1258 1259 finet = socksetup(PF_UNSPEC); 1260 if (finet) { 1261 if (SecureMode) { 1262 for (i = 0; i < *finet; i++) { 1263 if (shutdown(finet[i+1], SHUT_RD) < 0) { 1264 logerror("shutdown() failed"); 1265 die(0); 1266 } 1267 } 1268 } else 1269 dprintf("Listening on inet and/or inet6 socket\n"); 1270 dprintf("Sending on inet and/or inet6 socket\n"); 1271 } 1272 1273 logmsg(LOG_SYSLOG|LOG_INFO, "syslogd: restart", LocalHostName, ADDDATE); 1274 dprintf("syslogd: restarted\n"); 1275 } 1276 1277 /* 1278 * Crack a configuration file line 1279 */ 1280 void 1281 cfline(char *line, struct filed *f) 1282 { 1283 struct addrinfo hints, *res; 1284 int error, i, pri; 1285 char *bp, *p, *q; 1286 char buf[MAXLINE]; 1287 int sp_err; 1288 1289 dprintf("cfline(%s)\n", line); 1290 1291 errno = 0; /* keep strerror() stuff out of logerror messages */ 1292 1293 /* clear out file entry */ 1294 memset(f, 0, sizeof(*f)); 1295 for (i = 0; i <= LOG_NFACILITIES; i++) 1296 f->f_pmask[i] = INTERNAL_NOPRI; 1297 1298 /* 1299 * There should not be any space before the log facility. 1300 * Check this is okay, complain and fix if it is not. 1301 */ 1302 q = line; 1303 if (isblank((unsigned char)*line)) { 1304 errno = 0; 1305 logerror( 1306 "Warning: `%s' space or tab before the log facility", 1307 line); 1308 /* Fix: strip all spaces/tabs before the log facility */ 1309 while (*q++ && isblank((unsigned char)*q)); 1310 line = q; 1311 } 1312 1313 /* 1314 * q is now at the first char of the log facility 1315 * There should be at least one tab after the log facility 1316 * Check this is okay, and complain and fix if it is not. 1317 */ 1318 q = line + strlen(line); 1319 while (!isblank((unsigned char)*q) && (q != line)) 1320 q--; 1321 if ((q == line) && strlen(line)) { 1322 /* No tabs or space in a non empty line: complain */ 1323 errno = 0; 1324 logerror( 1325 "Error: `%s' log facility or log target missing", 1326 line); 1327 } 1328 1329 /* q is at the end of the blank between the two fields */ 1330 sp_err = 0; 1331 while (isblank((unsigned char)*q) && (q != line)) 1332 if (*q-- == ' ') 1333 sp_err = 1; 1334 1335 if (sp_err) { 1336 /* 1337 * A space somewhere between the log facility 1338 * and the log target: complain 1339 */ 1340 errno = 0; 1341 logerror( 1342 "Warning: `%s' space found where tab is expected", 1343 line); 1344 /* ... and fix the problem: replace all spaces by tabs */ 1345 while (*++q && isblank((unsigned char)*q)) 1346 if (*q == ' ') 1347 *q='\t'; 1348 } 1349 1350 /* scan through the list of selectors */ 1351 for (p = line; *p && *p != '\t';) { 1352 1353 /* find the end of this facility name list */ 1354 for (q = p; *q && *q != '\t' && *q++ != '.'; ) 1355 continue; 1356 1357 /* collect priority name */ 1358 for (bp = buf; *q && !strchr("\t,;", *q); ) 1359 *bp++ = *q++; 1360 *bp = '\0'; 1361 1362 /* skip cruft */ 1363 while (strchr(", ;", *q)) 1364 q++; 1365 1366 /* decode priority name */ 1367 if (*buf == '*') 1368 pri = LOG_PRIMASK + 1; 1369 else { 1370 pri = decode(buf, prioritynames); 1371 if (pri < 0) { 1372 errno = 0; 1373 logerror("Unknown priority name `%s'", buf); 1374 return; 1375 } 1376 } 1377 1378 /* scan facilities */ 1379 while (*p && !strchr("\t.;", *p)) { 1380 for (bp = buf; *p && !strchr("\t,;.", *p); ) 1381 *bp++ = *p++; 1382 *bp = '\0'; 1383 if (*buf == '*') 1384 for (i = 0; i < LOG_NFACILITIES; i++) 1385 f->f_pmask[i] = pri; 1386 else { 1387 i = decode(buf, facilitynames); 1388 if (i < 0) { 1389 errno = 0; 1390 logerror("Unknown facility name `%s'", 1391 buf); 1392 return; 1393 } 1394 f->f_pmask[i >> 3] = pri; 1395 } 1396 while (*p == ',' || *p == ' ') 1397 p++; 1398 } 1399 1400 p = q; 1401 } 1402 1403 /* skip to action part */ 1404 sp_err = 0; 1405 while ((*p == '\t') || (*p == ' ')) 1406 p++; 1407 1408 switch (*p) 1409 { 1410 case '@': 1411 (void)strcpy(f->f_un.f_forw.f_hname, ++p); 1412 memset(&hints, 0, sizeof(hints)); 1413 hints.ai_family = AF_UNSPEC; 1414 hints.ai_socktype = SOCK_DGRAM; 1415 hints.ai_protocol = 0; 1416 error = getaddrinfo(f->f_un.f_forw.f_hname, "syslog", &hints, 1417 &res); 1418 if (error) { 1419 logerror(gai_strerror(error)); 1420 break; 1421 } 1422 f->f_un.f_forw.f_addr = res; 1423 f->f_type = F_FORW; 1424 NumForwards++; 1425 break; 1426 1427 case '/': 1428 (void)strcpy(f->f_un.f_fname, p); 1429 if ((f->f_file = open(p, O_WRONLY|O_APPEND, 0)) < 0) { 1430 f->f_type = F_UNUSED; 1431 logerror(p); 1432 break; 1433 } 1434 if (isatty(f->f_file)) 1435 f->f_type = F_TTY; 1436 else 1437 f->f_type = F_FILE; 1438 if (strcmp(p, ctty) == 0) 1439 f->f_type = F_CONSOLE; 1440 break; 1441 1442 case '*': 1443 f->f_type = F_WALL; 1444 break; 1445 1446 default: 1447 for (i = 0; i < MAXUNAMES && *p; i++) { 1448 for (q = p; *q && *q != ','; ) 1449 q++; 1450 (void)strncpy(f->f_un.f_uname[i], p, UT_NAMESIZE); 1451 if ((q - p) > UT_NAMESIZE) 1452 f->f_un.f_uname[i][UT_NAMESIZE] = '\0'; 1453 else 1454 f->f_un.f_uname[i][q - p] = '\0'; 1455 while (*q == ',' || *q == ' ') 1456 q++; 1457 p = q; 1458 } 1459 f->f_type = F_USERS; 1460 break; 1461 } 1462 } 1463 1464 1465 /* 1466 * Decode a symbolic name to a numeric value 1467 */ 1468 int 1469 decode(const char *name, CODE *codetab) 1470 { 1471 CODE *c; 1472 char *p, buf[40]; 1473 1474 if (isdigit(*name)) 1475 return (atoi(name)); 1476 1477 for (p = buf; *name && p < &buf[sizeof(buf) - 1]; p++, name++) { 1478 if (isupper(*name)) 1479 *p = tolower(*name); 1480 else 1481 *p = *name; 1482 } 1483 *p = '\0'; 1484 for (c = codetab; c->c_name; c++) 1485 if (!strcmp(buf, c->c_name)) 1486 return (c->c_val); 1487 1488 return (-1); 1489 } 1490 1491 /* 1492 * Retrieve the size of the kernel message buffer, via sysctl. 1493 */ 1494 int 1495 getmsgbufsize(void) 1496 { 1497 int msgbufsize, mib[2]; 1498 size_t size; 1499 1500 mib[0] = CTL_KERN; 1501 mib[1] = KERN_MSGBUFSIZE; 1502 size = sizeof msgbufsize; 1503 if (sysctl(mib, 2, &msgbufsize, &size, NULL, 0) == -1) { 1504 dprintf("Couldn't get kern.msgbufsize\n"); 1505 return (0); 1506 } 1507 return (msgbufsize); 1508 } 1509 1510 int * 1511 socksetup(int af) 1512 { 1513 struct addrinfo hints, *res, *r; 1514 int error, maxs, *s, *socks; 1515 const int on = 1; 1516 1517 if(SecureMode && !NumForwards) 1518 return(NULL); 1519 1520 memset(&hints, 0, sizeof(hints)); 1521 hints.ai_flags = AI_PASSIVE; 1522 hints.ai_family = af; 1523 hints.ai_socktype = SOCK_DGRAM; 1524 error = getaddrinfo(NULL, "syslog", &hints, &res); 1525 if (error) { 1526 logerror(gai_strerror(error)); 1527 errno = 0; 1528 die(0); 1529 } 1530 1531 /* Count max number of sockets we may open */ 1532 for (maxs = 0, r = res; r; r = r->ai_next, maxs++) 1533 continue; 1534 socks = malloc((maxs+1) * sizeof(int)); 1535 if (!socks) { 1536 logerror("Couldn't allocate memory for sockets"); 1537 die(0); 1538 } 1539 1540 *socks = 0; /* num of sockets counter at start of array */ 1541 s = socks + 1; 1542 for (r = res; r; r = r->ai_next) { 1543 *s = socket(r->ai_family, r->ai_socktype, r->ai_protocol); 1544 if (*s < 0) { 1545 logerror("socket() failed"); 1546 continue; 1547 } 1548 if (r->ai_family == AF_INET6 && setsockopt(*s, IPPROTO_IPV6, 1549 IPV6_V6ONLY, &on, sizeof(on)) < 0) { 1550 logerror("setsockopt(IPV6_V6ONLY) failed"); 1551 close(*s); 1552 continue; 1553 } 1554 if (!SecureMode && bind(*s, r->ai_addr, r->ai_addrlen) < 0) { 1555 logerror("bind() failed"); 1556 close (*s); 1557 continue; 1558 } 1559 1560 *socks = *socks + 1; 1561 s++; 1562 } 1563 1564 if (*socks == 0) { 1565 free (socks); 1566 if(Debug) 1567 return(NULL); 1568 else 1569 die(0); 1570 } 1571 if (res) 1572 freeaddrinfo(res); 1573 1574 return(socks); 1575 } 1576