1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 /*- 32 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 33 * 34 * Copyright (c) 2018 Prodrive Technologies, https://prodrive-technologies.com/ 35 * Author: Ed Schouten <ed@FreeBSD.org> 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 46 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 47 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 48 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 49 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 50 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 51 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 52 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 53 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 54 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 55 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 56 * SUCH DAMAGE. 57 */ 58 59 #ifndef lint 60 static const char copyright[] = 61 "@(#) Copyright (c) 1983, 1988, 1993, 1994\n\ 62 The Regents of the University of California. All rights reserved.\n"; 63 #endif /* not lint */ 64 65 #ifndef lint 66 #if 0 67 static char sccsid[] = "@(#)syslogd.c 8.3 (Berkeley) 4/4/94"; 68 #endif 69 #endif /* not lint */ 70 71 #include <sys/cdefs.h> 72 __FBSDID("$FreeBSD$"); 73 74 /* 75 * syslogd -- log system messages 76 * 77 * This program implements a system log. It takes a series of lines. 78 * Each line may have a priority, signified as "<n>" as 79 * the first characters of the line. If this is 80 * not present, a default priority is used. 81 * 82 * To kill syslogd, send a signal 15 (terminate). A signal 1 (hup) will 83 * cause it to reread its configuration file. 84 * 85 * Defined Constants: 86 * 87 * MAXLINE -- the maximum line length that can be handled. 88 * DEFUPRI -- the default priority for user messages 89 * DEFSPRI -- the default priority for kernel messages 90 * 91 * Author: Eric Allman 92 * extensive changes by Ralph Campbell 93 * more extensive changes by Eric Allman (again) 94 * Extension to log by program name as well as facility and priority 95 * by Peter da Silva. 96 * -u and -v by Harlan Stenn. 97 * Priority comparison code by Harlan Stenn. 98 */ 99 100 /* Maximum number of characters in time of last occurrence */ 101 #define MAXLINE 2048 /* maximum line length */ 102 #define MAXSVLINE MAXLINE /* maximum saved line length */ 103 #define DEFUPRI (LOG_USER|LOG_NOTICE) 104 #define DEFSPRI (LOG_KERN|LOG_CRIT) 105 #define TIMERINTVL 30 /* interval for checking flush, mark */ 106 #define TTYMSGTIME 1 /* timeout passed to ttymsg */ 107 #define RCVBUF_MINSIZE (80 * 1024) /* minimum size of dgram rcv buffer */ 108 109 #include <sys/param.h> 110 #include <sys/ioctl.h> 111 #include <sys/mman.h> 112 #include <sys/queue.h> 113 #include <sys/resource.h> 114 #include <sys/socket.h> 115 #include <sys/stat.h> 116 #include <sys/syslimits.h> 117 #include <sys/time.h> 118 #include <sys/uio.h> 119 #include <sys/un.h> 120 #include <sys/wait.h> 121 122 #if defined(INET) || defined(INET6) 123 #include <netinet/in.h> 124 #include <arpa/inet.h> 125 #endif 126 127 #include <assert.h> 128 #include <ctype.h> 129 #include <dirent.h> 130 #include <err.h> 131 #include <errno.h> 132 #include <fcntl.h> 133 #include <fnmatch.h> 134 #include <libutil.h> 135 #include <limits.h> 136 #include <netdb.h> 137 #include <paths.h> 138 #include <signal.h> 139 #include <stdbool.h> 140 #include <stdio.h> 141 #include <stdlib.h> 142 #include <string.h> 143 #include <sysexits.h> 144 #include <unistd.h> 145 #include <utmpx.h> 146 147 #include "pathnames.h" 148 #include "ttymsg.h" 149 150 #define SYSLOG_NAMES 151 #include <sys/syslog.h> 152 153 static const char *ConfFile = _PATH_LOGCONF; 154 static const char *PidFile = _PATH_LOGPID; 155 static const char ctty[] = _PATH_CONSOLE; 156 static const char include_str[] = "include"; 157 static const char include_ext[] = ".conf"; 158 159 #define dprintf if (Debug) printf 160 161 #define MAXUNAMES 20 /* maximum number of user names */ 162 163 #define sstosa(ss) ((struct sockaddr *)(ss)) 164 #ifdef INET 165 #define sstosin(ss) ((struct sockaddr_in *)(void *)(ss)) 166 #define satosin(sa) ((struct sockaddr_in *)(void *)(sa)) 167 #endif 168 #ifdef INET6 169 #define sstosin6(ss) ((struct sockaddr_in6 *)(void *)(ss)) 170 #define satosin6(sa) ((struct sockaddr_in6 *)(void *)(sa)) 171 #define s6_addr32 __u6_addr.__u6_addr32 172 #define IN6_ARE_MASKED_ADDR_EQUAL(d, a, m) ( \ 173 (((d)->s6_addr32[0] ^ (a)->s6_addr32[0]) & (m)->s6_addr32[0]) == 0 && \ 174 (((d)->s6_addr32[1] ^ (a)->s6_addr32[1]) & (m)->s6_addr32[1]) == 0 && \ 175 (((d)->s6_addr32[2] ^ (a)->s6_addr32[2]) & (m)->s6_addr32[2]) == 0 && \ 176 (((d)->s6_addr32[3] ^ (a)->s6_addr32[3]) & (m)->s6_addr32[3]) == 0 ) 177 #endif 178 /* 179 * List of peers and sockets for binding. 180 */ 181 struct peer { 182 const char *pe_name; 183 const char *pe_serv; 184 mode_t pe_mode; 185 STAILQ_ENTRY(peer) next; 186 }; 187 static STAILQ_HEAD(, peer) pqueue = STAILQ_HEAD_INITIALIZER(pqueue); 188 189 struct socklist { 190 struct sockaddr_storage sl_ss; 191 int sl_socket; 192 struct peer *sl_peer; 193 int (*sl_recv)(struct socklist *); 194 STAILQ_ENTRY(socklist) next; 195 }; 196 static STAILQ_HEAD(, socklist) shead = STAILQ_HEAD_INITIALIZER(shead); 197 198 /* 199 * Flags to logmsg(). 200 */ 201 202 #define IGN_CONS 0x001 /* don't print on console */ 203 #define SYNC_FILE 0x002 /* do fsync on file after printing */ 204 #define MARK 0x008 /* this message is a mark */ 205 206 /* Timestamps of log entries. */ 207 struct logtime { 208 struct tm tm; 209 suseconds_t usec; 210 }; 211 212 /* Traditional syslog timestamp format. */ 213 #define RFC3164_DATELEN 15 214 #define RFC3164_DATEFMT "%b %e %H:%M:%S" 215 216 /* 217 * This structure represents the files that will have log 218 * copies printed. 219 * We require f_file to be valid if f_type is F_FILE, F_CONSOLE, F_TTY 220 * or if f_type is F_PIPE and f_pid > 0. 221 */ 222 223 struct filed { 224 STAILQ_ENTRY(filed) next; /* next in linked list */ 225 short f_type; /* entry type, see below */ 226 short f_file; /* file descriptor */ 227 time_t f_time; /* time this was last written */ 228 char *f_host; /* host from which to recd. */ 229 u_char f_pmask[LOG_NFACILITIES+1]; /* priority mask */ 230 u_char f_pcmp[LOG_NFACILITIES+1]; /* compare priority */ 231 #define PRI_LT 0x1 232 #define PRI_EQ 0x2 233 #define PRI_GT 0x4 234 char *f_program; /* program this applies to */ 235 union { 236 char f_uname[MAXUNAMES][MAXLOGNAME]; 237 struct { 238 char f_hname[MAXHOSTNAMELEN]; 239 struct addrinfo *f_addr; 240 241 } f_forw; /* forwarding address */ 242 char f_fname[MAXPATHLEN]; 243 struct { 244 char f_pname[MAXPATHLEN]; 245 pid_t f_pid; 246 } f_pipe; 247 } f_un; 248 #define fu_uname f_un.f_uname 249 #define fu_forw_hname f_un.f_forw.f_hname 250 #define fu_forw_addr f_un.f_forw.f_addr 251 #define fu_fname f_un.f_fname 252 #define fu_pipe_pname f_un.f_pipe.f_pname 253 #define fu_pipe_pid f_un.f_pipe.f_pid 254 char f_prevline[MAXSVLINE]; /* last message logged */ 255 struct logtime f_lasttime; /* time of last occurrence */ 256 int f_prevpri; /* pri of f_prevline */ 257 size_t f_prevlen; /* length of f_prevline */ 258 int f_prevcount; /* repetition cnt of prevline */ 259 u_int f_repeatcount; /* number of "repeated" msgs */ 260 int f_flags; /* file-specific flags */ 261 #define FFLAG_SYNC 0x01 262 #define FFLAG_NEEDSYNC 0x02 263 }; 264 265 /* 266 * Queue of about-to-be dead processes we should watch out for. 267 */ 268 struct deadq_entry { 269 pid_t dq_pid; 270 int dq_timeout; 271 TAILQ_ENTRY(deadq_entry) dq_entries; 272 }; 273 static TAILQ_HEAD(, deadq_entry) deadq_head = 274 TAILQ_HEAD_INITIALIZER(deadq_head); 275 276 /* 277 * The timeout to apply to processes waiting on the dead queue. Unit 278 * of measure is `mark intervals', i.e. 20 minutes by default. 279 * Processes on the dead queue will be terminated after that time. 280 */ 281 282 #define DQ_TIMO_INIT 2 283 284 /* 285 * Struct to hold records of network addresses that are allowed to log 286 * to us. 287 */ 288 struct allowedpeer { 289 int isnumeric; 290 u_short port; 291 union { 292 struct { 293 struct sockaddr_storage addr; 294 struct sockaddr_storage mask; 295 } numeric; 296 char *name; 297 } u; 298 #define a_addr u.numeric.addr 299 #define a_mask u.numeric.mask 300 #define a_name u.name 301 STAILQ_ENTRY(allowedpeer) next; 302 }; 303 static STAILQ_HEAD(, allowedpeer) aphead = STAILQ_HEAD_INITIALIZER(aphead); 304 305 306 /* 307 * Intervals at which we flush out "message repeated" messages, 308 * in seconds after previous message is logged. After each flush, 309 * we move to the next interval until we reach the largest. 310 */ 311 static int repeatinterval[] = { 30, 120, 600 }; /* # of secs before flush */ 312 #define MAXREPEAT (nitems(repeatinterval) - 1) 313 #define REPEATTIME(f) ((f)->f_time + repeatinterval[(f)->f_repeatcount]) 314 #define BACKOFF(f) do { \ 315 if (++(f)->f_repeatcount > MAXREPEAT) \ 316 (f)->f_repeatcount = MAXREPEAT; \ 317 } while (0) 318 319 /* values for f_type */ 320 #define F_UNUSED 0 /* unused entry */ 321 #define F_FILE 1 /* regular file */ 322 #define F_TTY 2 /* terminal */ 323 #define F_CONSOLE 3 /* console terminal */ 324 #define F_FORW 4 /* remote machine */ 325 #define F_USERS 5 /* list of users */ 326 #define F_WALL 6 /* everyone logged on */ 327 #define F_PIPE 7 /* pipe to program */ 328 329 static const char *TypeNames[] = { 330 "UNUSED", "FILE", "TTY", "CONSOLE", 331 "FORW", "USERS", "WALL", "PIPE" 332 }; 333 334 static STAILQ_HEAD(, filed) fhead = 335 STAILQ_HEAD_INITIALIZER(fhead); /* Log files that we write to */ 336 static struct filed consfile; /* Console */ 337 338 static int Debug; /* debug flag */ 339 static int Foreground = 0; /* Run in foreground, instead of daemonizing */ 340 static int resolve = 1; /* resolve hostname */ 341 static char LocalHostName[MAXHOSTNAMELEN]; /* our hostname */ 342 static const char *LocalDomain; /* our local domain name */ 343 static int Initialized; /* set when we have initialized ourselves */ 344 static int MarkInterval = 20 * 60; /* interval between marks in seconds */ 345 static int MarkSeq; /* mark sequence number */ 346 static int NoBind; /* don't bind() as suggested by RFC 3164 */ 347 static int SecureMode; /* when true, receive only unix domain socks */ 348 #ifdef INET6 349 static int family = PF_UNSPEC; /* protocol family (IPv4, IPv6 or both) */ 350 #else 351 static int family = PF_INET; /* protocol family (IPv4 only) */ 352 #endif 353 static int mask_C1 = 1; /* mask characters from 0x80 - 0x9F */ 354 static int send_to_all; /* send message to all IPv4/IPv6 addresses */ 355 static int use_bootfile; /* log entire bootfile for every kern msg */ 356 static int no_compress; /* don't compress messages (1=pipes, 2=all) */ 357 static int logflags = O_WRONLY|O_APPEND; /* flags used to open log files */ 358 359 static char bootfile[MAXLINE+1]; /* booted kernel file */ 360 361 static int RemoteAddDate; /* Always set the date on remote messages */ 362 static int RemoteHostname; /* Log remote hostname from the message */ 363 364 static int UniquePriority; /* Only log specified priority? */ 365 static int LogFacPri; /* Put facility and priority in log message: */ 366 /* 0=no, 1=numeric, 2=names */ 367 static int KeepKernFac; /* Keep remotely logged kernel facility */ 368 static int needdofsync = 0; /* Are any file(s) waiting to be fsynced? */ 369 static struct pidfh *pfh; 370 static int sigpipe[2]; /* Pipe to catch a signal during select(). */ 371 static bool RFC3164OutputFormat = true; /* Use legacy format by default. */ 372 373 static volatile sig_atomic_t MarkSet, WantDie, WantInitialize, WantReapchild; 374 375 struct iovlist; 376 377 static int allowaddr(char *); 378 static int addfile(struct filed *); 379 static int addpeer(struct peer *); 380 static int addsock(struct sockaddr *, socklen_t, struct socklist *); 381 static struct filed *cfline(const char *, const char *, const char *); 382 static const char *cvthname(struct sockaddr *); 383 static void deadq_enter(pid_t, const char *); 384 static int deadq_remove(struct deadq_entry *); 385 static int deadq_removebypid(pid_t); 386 static int decode(const char *, const CODE *); 387 static void die(int) __dead2; 388 static void dodie(int); 389 static void dofsync(void); 390 static void domark(int); 391 static void fprintlog_first(struct filed *, const char *, const char *, 392 const char *, const char *, const char *, const char *, int); 393 static void fprintlog_write(struct filed *, struct iovlist *, int); 394 static void fprintlog_successive(struct filed *, int); 395 static void init(int); 396 static void logerror(const char *); 397 static void logmsg(int, const struct logtime *, const char *, const char *, 398 const char *, const char *, const char *, const char *, int); 399 static void log_deadchild(pid_t, int, const char *); 400 static void markit(void); 401 static int socksetup(struct peer *); 402 static int socklist_recv_file(struct socklist *); 403 static int socklist_recv_sock(struct socklist *); 404 static int socklist_recv_signal(struct socklist *); 405 static void sighandler(int); 406 static int skip_message(const char *, const char *, int); 407 static void parsemsg(const char *, char *); 408 static void printsys(char *); 409 static int p_open(const char *, pid_t *); 410 static void reapchild(int); 411 static const char *ttymsg_check(struct iovec *, int, char *, int); 412 static void usage(void); 413 static int validate(struct sockaddr *, const char *); 414 static void unmapped(struct sockaddr *); 415 static void wallmsg(struct filed *, struct iovec *, const int iovlen); 416 static int waitdaemon(int); 417 static void timedout(int); 418 static void increase_rcvbuf(int); 419 420 static void 421 close_filed(struct filed *f) 422 { 423 424 if (f == NULL || f->f_file == -1) 425 return; 426 427 switch (f->f_type) { 428 case F_FORW: 429 if (f->f_un.f_forw.f_addr) { 430 freeaddrinfo(f->f_un.f_forw.f_addr); 431 f->f_un.f_forw.f_addr = NULL; 432 } 433 /* FALLTHROUGH */ 434 435 case F_FILE: 436 case F_TTY: 437 case F_CONSOLE: 438 f->f_type = F_UNUSED; 439 break; 440 case F_PIPE: 441 f->fu_pipe_pid = 0; 442 break; 443 } 444 (void)close(f->f_file); 445 f->f_file = -1; 446 } 447 448 static int 449 addfile(struct filed *f0) 450 { 451 struct filed *f; 452 453 f = calloc(1, sizeof(*f)); 454 if (f == NULL) 455 err(1, "malloc failed"); 456 *f = *f0; 457 STAILQ_INSERT_TAIL(&fhead, f, next); 458 459 return (0); 460 } 461 462 static int 463 addpeer(struct peer *pe0) 464 { 465 struct peer *pe; 466 467 pe = calloc(1, sizeof(*pe)); 468 if (pe == NULL) 469 err(1, "malloc failed"); 470 *pe = *pe0; 471 STAILQ_INSERT_TAIL(&pqueue, pe, next); 472 473 return (0); 474 } 475 476 static int 477 addsock(struct sockaddr *sa, socklen_t sa_len, struct socklist *sl0) 478 { 479 struct socklist *sl; 480 481 sl = calloc(1, sizeof(*sl)); 482 if (sl == NULL) 483 err(1, "malloc failed"); 484 *sl = *sl0; 485 if (sa != NULL && sa_len > 0) 486 memcpy(&sl->sl_ss, sa, sa_len); 487 STAILQ_INSERT_TAIL(&shead, sl, next); 488 489 return (0); 490 } 491 492 int 493 main(int argc, char *argv[]) 494 { 495 int ch, i, s, fdsrmax = 0, bflag = 0, pflag = 0, Sflag = 0; 496 fd_set *fdsr = NULL; 497 struct timeval tv, *tvp; 498 struct peer *pe; 499 struct socklist *sl; 500 pid_t ppid = 1, spid; 501 char *p; 502 503 if (madvise(NULL, 0, MADV_PROTECT) != 0) 504 dprintf("madvise() failed: %s\n", strerror(errno)); 505 506 while ((ch = getopt(argc, argv, "468Aa:b:cCdf:FHkl:m:nNoO:p:P:sS:Tuv")) 507 != -1) 508 switch (ch) { 509 #ifdef INET 510 case '4': 511 family = PF_INET; 512 break; 513 #endif 514 #ifdef INET6 515 case '6': 516 family = PF_INET6; 517 break; 518 #endif 519 case '8': 520 mask_C1 = 0; 521 break; 522 case 'A': 523 send_to_all++; 524 break; 525 case 'a': /* allow specific network addresses only */ 526 if (allowaddr(optarg) == -1) 527 usage(); 528 break; 529 case 'b': 530 bflag = 1; 531 p = strchr(optarg, ']'); 532 if (p != NULL) 533 p = strchr(p + 1, ':'); 534 else { 535 p = strchr(optarg, ':'); 536 if (p != NULL && strchr(p + 1, ':') != NULL) 537 p = NULL; /* backward compatibility */ 538 } 539 if (p == NULL) { 540 /* A hostname or filename only. */ 541 addpeer(&(struct peer){ 542 .pe_name = optarg, 543 .pe_serv = "syslog" 544 }); 545 } else { 546 /* The case of "name:service". */ 547 *p++ = '\0'; 548 addpeer(&(struct peer){ 549 .pe_serv = p, 550 .pe_name = (strlen(optarg) == 0) ? 551 NULL : optarg, 552 }); 553 } 554 break; 555 case 'c': 556 no_compress++; 557 break; 558 case 'C': 559 logflags |= O_CREAT; 560 break; 561 case 'd': /* debug */ 562 Debug++; 563 break; 564 case 'f': /* configuration file */ 565 ConfFile = optarg; 566 break; 567 case 'F': /* run in foreground instead of daemon */ 568 Foreground++; 569 break; 570 case 'H': 571 RemoteHostname = 1; 572 break; 573 case 'k': /* keep remote kern fac */ 574 KeepKernFac = 1; 575 break; 576 case 'l': 577 case 'p': 578 case 'S': 579 { 580 long perml; 581 mode_t mode; 582 char *name, *ep; 583 584 if (ch == 'l') 585 mode = DEFFILEMODE; 586 else if (ch == 'p') { 587 mode = DEFFILEMODE; 588 pflag = 1; 589 } else { 590 mode = S_IRUSR | S_IWUSR; 591 Sflag = 1; 592 } 593 if (optarg[0] == '/') 594 name = optarg; 595 else if ((name = strchr(optarg, ':')) != NULL) { 596 *name++ = '\0'; 597 if (name[0] != '/') 598 errx(1, "socket name must be absolute " 599 "path"); 600 if (isdigit(*optarg)) { 601 perml = strtol(optarg, &ep, 8); 602 if (*ep || perml < 0 || 603 perml & ~(S_IRWXU|S_IRWXG|S_IRWXO)) 604 errx(1, "invalid mode %s, exiting", 605 optarg); 606 mode = (mode_t )perml; 607 } else 608 errx(1, "invalid mode %s, exiting", 609 optarg); 610 } else 611 errx(1, "invalid filename %s, exiting", 612 optarg); 613 addpeer(&(struct peer){ 614 .pe_name = name, 615 .pe_mode = mode 616 }); 617 break; 618 } 619 case 'm': /* mark interval */ 620 MarkInterval = atoi(optarg) * 60; 621 break; 622 case 'N': 623 NoBind = 1; 624 SecureMode = 1; 625 break; 626 case 'n': 627 resolve = 0; 628 break; 629 case 'O': 630 if (strcmp(optarg, "bsd") == 0 || 631 strcmp(optarg, "rfc3164") == 0) 632 RFC3164OutputFormat = true; 633 else if (strcmp(optarg, "syslog") == 0 || 634 strcmp(optarg, "rfc5424") == 0) 635 RFC3164OutputFormat = false; 636 else 637 usage(); 638 break; 639 case 'o': 640 use_bootfile = 1; 641 break; 642 case 'P': /* path for alt. PID */ 643 PidFile = optarg; 644 break; 645 case 's': /* no network mode */ 646 SecureMode++; 647 break; 648 case 'T': 649 RemoteAddDate = 1; 650 break; 651 case 'u': /* only log specified priority */ 652 UniquePriority++; 653 break; 654 case 'v': /* log facility and priority */ 655 LogFacPri++; 656 break; 657 default: 658 usage(); 659 } 660 if ((argc -= optind) != 0) 661 usage(); 662 663 /* Pipe to catch a signal during select(). */ 664 s = pipe2(sigpipe, O_CLOEXEC); 665 if (s < 0) { 666 err(1, "cannot open a pipe for signals"); 667 } else { 668 addsock(NULL, 0, &(struct socklist){ 669 .sl_socket = sigpipe[0], 670 .sl_recv = socklist_recv_signal 671 }); 672 } 673 674 /* Listen by default: /dev/klog. */ 675 s = open(_PATH_KLOG, O_RDONLY | O_NONBLOCK | O_CLOEXEC, 0); 676 if (s < 0) { 677 dprintf("can't open %s (%d)\n", _PATH_KLOG, errno); 678 } else { 679 addsock(NULL, 0, &(struct socklist){ 680 .sl_socket = s, 681 .sl_recv = socklist_recv_file, 682 }); 683 } 684 /* Listen by default: *:514 if no -b flag. */ 685 if (bflag == 0) 686 addpeer(&(struct peer){ 687 .pe_serv = "syslog" 688 }); 689 /* Listen by default: /var/run/log if no -p flag. */ 690 if (pflag == 0) 691 addpeer(&(struct peer){ 692 .pe_name = _PATH_LOG, 693 .pe_mode = DEFFILEMODE, 694 }); 695 /* Listen by default: /var/run/logpriv if no -S flag. */ 696 if (Sflag == 0) 697 addpeer(&(struct peer){ 698 .pe_name = _PATH_LOG_PRIV, 699 .pe_mode = S_IRUSR | S_IWUSR, 700 }); 701 STAILQ_FOREACH(pe, &pqueue, next) 702 socksetup(pe); 703 704 pfh = pidfile_open(PidFile, 0600, &spid); 705 if (pfh == NULL) { 706 if (errno == EEXIST) 707 errx(1, "syslogd already running, pid: %d", spid); 708 warn("cannot open pid file"); 709 } 710 711 if ((!Foreground) && (!Debug)) { 712 ppid = waitdaemon(30); 713 if (ppid < 0) { 714 warn("could not become daemon"); 715 pidfile_remove(pfh); 716 exit(1); 717 } 718 } else if (Debug) 719 setlinebuf(stdout); 720 721 consfile.f_type = F_CONSOLE; 722 (void)strlcpy(consfile.fu_fname, ctty + sizeof _PATH_DEV - 1, 723 sizeof(consfile.fu_fname)); 724 (void)strlcpy(bootfile, getbootfile(), sizeof(bootfile)); 725 (void)signal(SIGTERM, dodie); 726 (void)signal(SIGINT, Debug ? dodie : SIG_IGN); 727 (void)signal(SIGQUIT, Debug ? dodie : SIG_IGN); 728 (void)signal(SIGHUP, sighandler); 729 (void)signal(SIGCHLD, sighandler); 730 (void)signal(SIGALRM, domark); 731 (void)signal(SIGPIPE, SIG_IGN); /* We'll catch EPIPE instead. */ 732 (void)alarm(TIMERINTVL); 733 734 /* tuck my process id away */ 735 pidfile_write(pfh); 736 737 dprintf("off & running....\n"); 738 739 tvp = &tv; 740 tv.tv_sec = tv.tv_usec = 0; 741 742 STAILQ_FOREACH(sl, &shead, next) { 743 if (sl->sl_socket > fdsrmax) 744 fdsrmax = sl->sl_socket; 745 } 746 fdsr = (fd_set *)calloc(howmany(fdsrmax+1, NFDBITS), 747 sizeof(*fdsr)); 748 if (fdsr == NULL) 749 errx(1, "calloc fd_set"); 750 751 for (;;) { 752 if (Initialized == 0) 753 init(0); 754 else if (WantInitialize) 755 init(WantInitialize); 756 if (WantReapchild) 757 reapchild(WantReapchild); 758 if (MarkSet) 759 markit(); 760 if (WantDie) { 761 free(fdsr); 762 die(WantDie); 763 } 764 765 bzero(fdsr, howmany(fdsrmax+1, NFDBITS) * 766 sizeof(*fdsr)); 767 768 STAILQ_FOREACH(sl, &shead, next) { 769 if (sl->sl_socket != -1 && sl->sl_recv != NULL) 770 FD_SET(sl->sl_socket, fdsr); 771 } 772 i = select(fdsrmax + 1, fdsr, NULL, NULL, 773 needdofsync ? &tv : tvp); 774 switch (i) { 775 case 0: 776 dofsync(); 777 needdofsync = 0; 778 if (tvp) { 779 tvp = NULL; 780 if (ppid != 1) 781 kill(ppid, SIGALRM); 782 } 783 continue; 784 case -1: 785 if (errno != EINTR) 786 logerror("select"); 787 continue; 788 } 789 STAILQ_FOREACH(sl, &shead, next) { 790 if (FD_ISSET(sl->sl_socket, fdsr)) 791 (*sl->sl_recv)(sl); 792 } 793 } 794 free(fdsr); 795 } 796 797 static int 798 socklist_recv_signal(struct socklist *sl __unused) 799 { 800 ssize_t len; 801 int i, nsig, signo; 802 803 if (ioctl(sigpipe[0], FIONREAD, &i) != 0) { 804 logerror("ioctl(FIONREAD)"); 805 err(1, "signal pipe read failed"); 806 } 807 nsig = i / sizeof(signo); 808 dprintf("# of received signals = %d\n", nsig); 809 for (i = 0; i < nsig; i++) { 810 len = read(sigpipe[0], &signo, sizeof(signo)); 811 if (len != sizeof(signo)) { 812 logerror("signal pipe read failed"); 813 err(1, "signal pipe read failed"); 814 } 815 dprintf("Received signal: %d from fd=%d\n", signo, 816 sigpipe[0]); 817 switch (signo) { 818 case SIGHUP: 819 WantInitialize = 1; 820 break; 821 case SIGCHLD: 822 WantReapchild = 1; 823 break; 824 } 825 } 826 return (0); 827 } 828 829 static int 830 socklist_recv_sock(struct socklist *sl) 831 { 832 struct sockaddr_storage ss; 833 struct sockaddr *sa = (struct sockaddr *)&ss; 834 socklen_t sslen; 835 const char *hname; 836 char line[MAXLINE + 1]; 837 int len; 838 839 sslen = sizeof(ss); 840 len = recvfrom(sl->sl_socket, line, sizeof(line) - 1, 0, sa, &sslen); 841 dprintf("received sa_len = %d\n", sslen); 842 if (len == 0) 843 return (-1); 844 if (len < 0) { 845 if (errno != EINTR) 846 logerror("recvfrom"); 847 return (-1); 848 } 849 /* Received valid data. */ 850 line[len] = '\0'; 851 if (sl->sl_ss.ss_family == AF_LOCAL) 852 hname = LocalHostName; 853 else { 854 hname = cvthname(sa); 855 unmapped(sa); 856 if (validate(sa, hname) == 0) { 857 dprintf("Message from %s was ignored.", hname); 858 return (-1); 859 } 860 } 861 parsemsg(hname, line); 862 863 return (0); 864 } 865 866 static void 867 unmapped(struct sockaddr *sa) 868 { 869 #if defined(INET) && defined(INET6) 870 struct sockaddr_in6 *sin6; 871 struct sockaddr_in sin; 872 873 if (sa == NULL || 874 sa->sa_family != AF_INET6 || 875 sa->sa_len != sizeof(*sin6)) 876 return; 877 sin6 = satosin6(sa); 878 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 879 return; 880 sin = (struct sockaddr_in){ 881 .sin_family = AF_INET, 882 .sin_len = sizeof(sin), 883 .sin_port = sin6->sin6_port 884 }; 885 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12], 886 sizeof(sin.sin_addr)); 887 memcpy(sa, &sin, sizeof(sin)); 888 #else 889 if (sa == NULL) 890 return; 891 #endif 892 } 893 894 static void 895 usage(void) 896 { 897 898 fprintf(stderr, 899 "usage: syslogd [-468ACcdFHknosTuv] [-a allowed_peer]\n" 900 " [-b bind_address] [-f config_file]\n" 901 " [-l [mode:]path] [-m mark_interval]\n" 902 " [-O format] [-P pid_file] [-p log_socket]\n" 903 " [-S logpriv_socket]\n"); 904 exit(1); 905 } 906 907 /* 908 * Removes characters from log messages that are unsafe to display. 909 * TODO: Permit UTF-8 strings that include a BOM per RFC 5424? 910 */ 911 static void 912 parsemsg_remove_unsafe_characters(const char *in, char *out, size_t outlen) 913 { 914 char *q; 915 int c; 916 917 q = out; 918 while ((c = (unsigned char)*in++) != '\0' && q < out + outlen - 4) { 919 if (mask_C1 && (c & 0x80) && c < 0xA0) { 920 c &= 0x7F; 921 *q++ = 'M'; 922 *q++ = '-'; 923 } 924 if (isascii(c) && iscntrl(c)) { 925 if (c == '\n') { 926 *q++ = ' '; 927 } else if (c == '\t') { 928 *q++ = '\t'; 929 } else { 930 *q++ = '^'; 931 *q++ = c ^ 0100; 932 } 933 } else { 934 *q++ = c; 935 } 936 } 937 *q = '\0'; 938 } 939 940 /* 941 * Parses a syslog message according to RFC 5424, assuming that PRI and 942 * VERSION (i.e., "<%d>1 ") have already been parsed by parsemsg(). The 943 * parsed result is passed to logmsg(). 944 */ 945 static void 946 parsemsg_rfc5424(const char *from, int pri, char *msg) 947 { 948 const struct logtime *timestamp; 949 struct logtime timestamp_remote; 950 const char *omsg, *hostname, *app_name, *procid, *msgid, 951 *structured_data; 952 char line[MAXLINE + 1]; 953 954 #define FAIL_IF(field, expr) do { \ 955 if (expr) { \ 956 dprintf("Failed to parse " field " from %s: %s\n", \ 957 from, omsg); \ 958 return; \ 959 } \ 960 } while (0) 961 #define PARSE_CHAR(field, sep) do { \ 962 FAIL_IF(field, *msg != sep); \ 963 ++msg; \ 964 } while (0) 965 #define IF_NOT_NILVALUE(var) \ 966 if (msg[0] == '-' && msg[1] == ' ') { \ 967 msg += 2; \ 968 var = NULL; \ 969 } else if (msg[0] == '-' && msg[1] == '\0') { \ 970 ++msg; \ 971 var = NULL; \ 972 } else 973 974 omsg = msg; 975 IF_NOT_NILVALUE(timestamp) { 976 /* Parse RFC 3339-like timestamp. */ 977 #define PARSE_NUMBER(dest, length, min, max) do { \ 978 int i, v; \ 979 \ 980 v = 0; \ 981 for (i = 0; i < length; ++i) { \ 982 FAIL_IF("TIMESTAMP", *msg < '0' || *msg > '9'); \ 983 v = v * 10 + *msg++ - '0'; \ 984 } \ 985 FAIL_IF("TIMESTAMP", v < min || v > max); \ 986 dest = v; \ 987 } while (0) 988 /* Date and time. */ 989 memset(×tamp_remote, 0, sizeof(timestamp_remote)); 990 PARSE_NUMBER(timestamp_remote.tm.tm_year, 4, 0, 9999); 991 timestamp_remote.tm.tm_year -= 1900; 992 PARSE_CHAR("TIMESTAMP", '-'); 993 PARSE_NUMBER(timestamp_remote.tm.tm_mon, 2, 1, 12); 994 --timestamp_remote.tm.tm_mon; 995 PARSE_CHAR("TIMESTAMP", '-'); 996 PARSE_NUMBER(timestamp_remote.tm.tm_mday, 2, 1, 31); 997 PARSE_CHAR("TIMESTAMP", 'T'); 998 PARSE_NUMBER(timestamp_remote.tm.tm_hour, 2, 0, 23); 999 PARSE_CHAR("TIMESTAMP", ':'); 1000 PARSE_NUMBER(timestamp_remote.tm.tm_min, 2, 0, 59); 1001 PARSE_CHAR("TIMESTAMP", ':'); 1002 PARSE_NUMBER(timestamp_remote.tm.tm_sec, 2, 0, 59); 1003 /* Perform normalization. */ 1004 timegm(×tamp_remote.tm); 1005 /* Optional: fractional seconds. */ 1006 if (msg[0] == '.' && msg[1] >= '0' && msg[1] <= '9') { 1007 int i; 1008 1009 ++msg; 1010 for (i = 100000; i != 0; i /= 10) { 1011 if (*msg < '0' || *msg > '9') 1012 break; 1013 timestamp_remote.usec += (*msg++ - '0') * i; 1014 } 1015 } 1016 /* Timezone. */ 1017 if (*msg == 'Z') { 1018 /* UTC. */ 1019 ++msg; 1020 } else { 1021 int sign, tz_hour, tz_min; 1022 1023 /* Local time zone offset. */ 1024 FAIL_IF("TIMESTAMP", *msg != '-' && *msg != '+'); 1025 sign = *msg++ == '-' ? -1 : 1; 1026 PARSE_NUMBER(tz_hour, 2, 0, 23); 1027 PARSE_CHAR("TIMESTAMP", ':'); 1028 PARSE_NUMBER(tz_min, 2, 0, 59); 1029 timestamp_remote.tm.tm_gmtoff = 1030 sign * (tz_hour * 3600 + tz_min * 60); 1031 } 1032 #undef PARSE_NUMBER 1033 PARSE_CHAR("TIMESTAMP", ' '); 1034 timestamp = RemoteAddDate ? NULL : ×tamp_remote; 1035 } 1036 1037 /* String fields part of the HEADER. */ 1038 #define PARSE_STRING(field, var) \ 1039 IF_NOT_NILVALUE(var) { \ 1040 var = msg; \ 1041 while (*msg >= '!' && *msg <= '~') \ 1042 ++msg; \ 1043 FAIL_IF(field, var == msg); \ 1044 PARSE_CHAR(field, ' '); \ 1045 msg[-1] = '\0'; \ 1046 } 1047 PARSE_STRING("HOSTNAME", hostname); 1048 if (hostname == NULL || !RemoteHostname) 1049 hostname = from; 1050 PARSE_STRING("APP-NAME", app_name); 1051 PARSE_STRING("PROCID", procid); 1052 PARSE_STRING("MSGID", msgid); 1053 #undef PARSE_STRING 1054 1055 /* Structured data. */ 1056 #define PARSE_SD_NAME() do { \ 1057 const char *start; \ 1058 \ 1059 start = msg; \ 1060 while (*msg >= '!' && *msg <= '~' && *msg != '=' && \ 1061 *msg != ']' && *msg != '"') \ 1062 ++msg; \ 1063 FAIL_IF("STRUCTURED-NAME", start == msg); \ 1064 } while (0) 1065 IF_NOT_NILVALUE(structured_data) { 1066 /* SD-ELEMENT. */ 1067 while (*msg == '[') { 1068 ++msg; 1069 /* SD-ID. */ 1070 PARSE_SD_NAME(); 1071 /* SD-PARAM. */ 1072 while (*msg == ' ') { 1073 ++msg; 1074 /* PARAM-NAME. */ 1075 PARSE_SD_NAME(); 1076 PARSE_CHAR("STRUCTURED-NAME", '='); 1077 PARSE_CHAR("STRUCTURED-NAME", '"'); 1078 while (*msg != '"') { 1079 FAIL_IF("STRUCTURED-NAME", 1080 *msg == '\0'); 1081 if (*msg++ == '\\') { 1082 FAIL_IF("STRUCTURED-NAME", 1083 *msg == '\0'); 1084 ++msg; 1085 } 1086 } 1087 ++msg; 1088 } 1089 PARSE_CHAR("STRUCTURED-NAME", ']'); 1090 } 1091 PARSE_CHAR("STRUCTURED-NAME", ' '); 1092 msg[-1] = '\0'; 1093 } 1094 #undef PARSE_SD_NAME 1095 1096 #undef FAIL_IF 1097 #undef PARSE_CHAR 1098 #undef IF_NOT_NILVALUE 1099 1100 parsemsg_remove_unsafe_characters(msg, line, sizeof(line)); 1101 logmsg(pri, timestamp, hostname, app_name, procid, msgid, 1102 structured_data, line, 0); 1103 } 1104 1105 /* 1106 * Trims the application name ("TAG" in RFC 3164 terminology) and 1107 * process ID from a message if present. 1108 */ 1109 static void 1110 parsemsg_rfc3164_app_name_procid(char **msg, const char **app_name, 1111 const char **procid) { 1112 char *m, *app_name_begin, *procid_begin; 1113 size_t app_name_length, procid_length; 1114 1115 m = *msg; 1116 1117 /* Application name. */ 1118 app_name_begin = m; 1119 app_name_length = strspn(m, 1120 "abcdefghijklmnopqrstuvwxyz" 1121 "ABCDEFGHIJKLMNOPQRSTUVWXYZ" 1122 "0123456789" 1123 "_-"); 1124 if (app_name_length == 0) 1125 goto bad; 1126 m += app_name_length; 1127 1128 /* Process identifier (optional). */ 1129 if (*m == '[') { 1130 procid_begin = ++m; 1131 procid_length = strspn(m, "0123456789"); 1132 if (procid_length == 0) 1133 goto bad; 1134 m += procid_length; 1135 if (*m++ != ']') 1136 goto bad; 1137 } else { 1138 procid_begin = NULL; 1139 procid_length = 0; 1140 } 1141 1142 /* Separator. */ 1143 if (m[0] != ':' || m[1] != ' ') 1144 goto bad; 1145 1146 /* Split strings from input. */ 1147 app_name_begin[app_name_length] = '\0'; 1148 if (procid_begin != 0) 1149 procid_begin[procid_length] = '\0'; 1150 1151 *msg = m + 2; 1152 *app_name = app_name_begin; 1153 *procid = procid_begin; 1154 return; 1155 bad: 1156 *app_name = NULL; 1157 *procid = NULL; 1158 } 1159 1160 /* 1161 * Parses a syslog message according to RFC 3164, assuming that PRI 1162 * (i.e., "<%d>") has already been parsed by parsemsg(). The parsed 1163 * result is passed to logmsg(). 1164 */ 1165 static void 1166 parsemsg_rfc3164(const char *from, int pri, char *msg) 1167 { 1168 struct tm tm_parsed; 1169 const struct logtime *timestamp; 1170 struct logtime timestamp_remote; 1171 const char *app_name, *procid; 1172 size_t i, msglen; 1173 char line[MAXLINE + 1]; 1174 1175 /* Parse the timestamp provided by the remote side. */ 1176 if (strptime(msg, RFC3164_DATEFMT, &tm_parsed) != 1177 msg + RFC3164_DATELEN || msg[RFC3164_DATELEN] != ' ') { 1178 dprintf("Failed to parse TIMESTAMP from %s: %s\n", from, msg); 1179 return; 1180 } 1181 msg += RFC3164_DATELEN + 1; 1182 1183 if (!RemoteAddDate) { 1184 struct tm tm_now; 1185 time_t t_now; 1186 int year; 1187 1188 /* 1189 * As the timestamp does not contain the year number, 1190 * daylight saving time information, nor a time zone, 1191 * attempt to infer it. Due to clock skews, the 1192 * timestamp may even be part of the next year. Use the 1193 * last year for which the timestamp is at most one week 1194 * in the future. 1195 * 1196 * This loop can only run for at most three iterations 1197 * before terminating. 1198 */ 1199 t_now = time(NULL); 1200 localtime_r(&t_now, &tm_now); 1201 for (year = tm_now.tm_year + 1;; --year) { 1202 assert(year >= tm_now.tm_year - 1); 1203 timestamp_remote.tm = tm_parsed; 1204 timestamp_remote.tm.tm_year = year; 1205 timestamp_remote.tm.tm_isdst = -1; 1206 timestamp_remote.usec = 0; 1207 if (mktime(×tamp_remote.tm) < 1208 t_now + 7 * 24 * 60 * 60) 1209 break; 1210 } 1211 timestamp = ×tamp_remote; 1212 } else 1213 timestamp = NULL; 1214 1215 /* 1216 * A single space character MUST also follow the HOSTNAME field. 1217 */ 1218 msglen = strlen(msg); 1219 for (i = 0; i < MIN(MAXHOSTNAMELEN, msglen); i++) { 1220 if (msg[i] == ' ') { 1221 if (RemoteHostname) { 1222 msg[i] = '\0'; 1223 from = msg; 1224 } 1225 msg += i + 1; 1226 break; 1227 } 1228 /* 1229 * Support non RFC compliant messages, without hostname. 1230 */ 1231 if (msg[i] == ':') 1232 break; 1233 } 1234 if (i == MIN(MAXHOSTNAMELEN, msglen)) { 1235 dprintf("Invalid HOSTNAME from %s: %s\n", from, msg); 1236 return; 1237 } 1238 1239 /* Remove the TAG, if present. */ 1240 parsemsg_rfc3164_app_name_procid(&msg, &app_name, &procid); 1241 parsemsg_remove_unsafe_characters(msg, line, sizeof(line)); 1242 logmsg(pri, timestamp, from, app_name, procid, NULL, NULL, line, 0); 1243 } 1244 1245 /* 1246 * Takes a raw input line, extracts PRI and determines whether the 1247 * message is formatted according to RFC 3164 or RFC 5424. Continues 1248 * parsing of addition fields in the message according to those 1249 * standards and prints the message on the appropriate log files. 1250 */ 1251 static void 1252 parsemsg(const char *from, char *msg) 1253 { 1254 char *q; 1255 long n; 1256 size_t i; 1257 int pri; 1258 1259 /* Parse PRI. */ 1260 if (msg[0] != '<' || !isdigit(msg[1])) { 1261 dprintf("Invalid PRI from %s\n", from); 1262 return; 1263 } 1264 for (i = 2; i <= 4; i++) { 1265 if (msg[i] == '>') 1266 break; 1267 if (!isdigit(msg[i])) { 1268 dprintf("Invalid PRI header from %s\n", from); 1269 return; 1270 } 1271 } 1272 if (msg[i] != '>') { 1273 dprintf("Invalid PRI header from %s\n", from); 1274 return; 1275 } 1276 errno = 0; 1277 n = strtol(msg + 1, &q, 10); 1278 if (errno != 0 || *q != msg[i] || n < 0 || n >= INT_MAX) { 1279 dprintf("Invalid PRI %ld from %s: %s\n", 1280 n, from, strerror(errno)); 1281 return; 1282 } 1283 pri = n; 1284 if (pri &~ (LOG_FACMASK|LOG_PRIMASK)) 1285 pri = DEFUPRI; 1286 1287 /* 1288 * Don't allow users to log kernel messages. 1289 * NOTE: since LOG_KERN == 0 this will also match 1290 * messages with no facility specified. 1291 */ 1292 if ((pri & LOG_FACMASK) == LOG_KERN && !KeepKernFac) 1293 pri = LOG_MAKEPRI(LOG_USER, LOG_PRI(pri)); 1294 1295 /* Parse VERSION. */ 1296 msg += i + 1; 1297 if (msg[0] == '1' && msg[1] == ' ') 1298 parsemsg_rfc5424(from, pri, msg + 2); 1299 else 1300 parsemsg_rfc3164(from, pri, msg); 1301 } 1302 1303 /* 1304 * Read /dev/klog while data are available, split into lines. 1305 */ 1306 static int 1307 socklist_recv_file(struct socklist *sl) 1308 { 1309 char *p, *q, line[MAXLINE + 1]; 1310 int len, i; 1311 1312 len = 0; 1313 for (;;) { 1314 i = read(sl->sl_socket, line + len, MAXLINE - 1 - len); 1315 if (i > 0) { 1316 line[i + len] = '\0'; 1317 } else { 1318 if (i < 0 && errno != EINTR && errno != EAGAIN) { 1319 logerror("klog"); 1320 close(sl->sl_socket); 1321 sl->sl_socket = -1; 1322 } 1323 break; 1324 } 1325 1326 for (p = line; (q = strchr(p, '\n')) != NULL; p = q + 1) { 1327 *q = '\0'; 1328 printsys(p); 1329 } 1330 len = strlen(p); 1331 if (len >= MAXLINE - 1) { 1332 printsys(p); 1333 len = 0; 1334 } 1335 if (len > 0) 1336 memmove(line, p, len + 1); 1337 } 1338 if (len > 0) 1339 printsys(line); 1340 1341 return (len); 1342 } 1343 1344 /* 1345 * Take a raw input line from /dev/klog, format similar to syslog(). 1346 */ 1347 static void 1348 printsys(char *msg) 1349 { 1350 char *p, *q; 1351 long n; 1352 int flags, isprintf, pri; 1353 1354 flags = SYNC_FILE; /* fsync after write */ 1355 p = msg; 1356 pri = DEFSPRI; 1357 isprintf = 1; 1358 if (*p == '<') { 1359 errno = 0; 1360 n = strtol(p + 1, &q, 10); 1361 if (*q == '>' && n >= 0 && n < INT_MAX && errno == 0) { 1362 p = q + 1; 1363 pri = n; 1364 isprintf = 0; 1365 } 1366 } 1367 /* 1368 * Kernel printf's and LOG_CONSOLE messages have been displayed 1369 * on the console already. 1370 */ 1371 if (isprintf || (pri & LOG_FACMASK) == LOG_CONSOLE) 1372 flags |= IGN_CONS; 1373 if (pri &~ (LOG_FACMASK|LOG_PRIMASK)) 1374 pri = DEFSPRI; 1375 logmsg(pri, NULL, LocalHostName, "kernel", NULL, NULL, NULL, p, flags); 1376 } 1377 1378 static time_t now; 1379 1380 /* 1381 * Match a program or host name against a specification. 1382 * Return a non-0 value if the message must be ignored 1383 * based on the specification. 1384 */ 1385 static int 1386 skip_message(const char *name, const char *spec, int checkcase) 1387 { 1388 const char *s; 1389 char prev, next; 1390 int exclude = 0; 1391 /* Behaviour on explicit match */ 1392 1393 if (spec == NULL) 1394 return 0; 1395 switch (*spec) { 1396 case '-': 1397 exclude = 1; 1398 /*FALLTHROUGH*/ 1399 case '+': 1400 spec++; 1401 break; 1402 default: 1403 break; 1404 } 1405 if (checkcase) 1406 s = strstr (spec, name); 1407 else 1408 s = strcasestr (spec, name); 1409 1410 if (s != NULL) { 1411 prev = (s == spec ? ',' : *(s - 1)); 1412 next = *(s + strlen (name)); 1413 1414 if (prev == ',' && (next == '\0' || next == ',')) 1415 /* Explicit match: skip iff the spec is an 1416 exclusive one. */ 1417 return exclude; 1418 } 1419 1420 /* No explicit match for this name: skip the message iff 1421 the spec is an inclusive one. */ 1422 return !exclude; 1423 } 1424 1425 /* 1426 * Logs a message to the appropriate log files, users, etc. based on the 1427 * priority. Log messages are always formatted according to RFC 3164, 1428 * even if they were in RFC 5424 format originally, The MSGID and 1429 * STRUCTURED-DATA fields are thus discarded for the time being. 1430 */ 1431 static void 1432 logmsg(int pri, const struct logtime *timestamp, const char *hostname, 1433 const char *app_name, const char *procid, const char *msgid, 1434 const char *structured_data, const char *msg, int flags) 1435 { 1436 struct timeval tv; 1437 struct logtime timestamp_now; 1438 struct filed *f; 1439 size_t savedlen; 1440 int fac, prilev; 1441 char saved[MAXSVLINE]; 1442 1443 dprintf("logmsg: pri %o, flags %x, from %s, msg %s\n", 1444 pri, flags, hostname, msg); 1445 1446 (void)gettimeofday(&tv, NULL); 1447 now = tv.tv_sec; 1448 if (timestamp == NULL) { 1449 localtime_r(&now, ×tamp_now.tm); 1450 timestamp_now.usec = tv.tv_usec; 1451 timestamp = ×tamp_now; 1452 } 1453 1454 /* extract facility and priority level */ 1455 if (flags & MARK) 1456 fac = LOG_NFACILITIES; 1457 else 1458 fac = LOG_FAC(pri); 1459 1460 /* Check maximum facility number. */ 1461 if (fac > LOG_NFACILITIES) 1462 return; 1463 1464 prilev = LOG_PRI(pri); 1465 1466 /* log the message to the particular outputs */ 1467 if (!Initialized) { 1468 f = &consfile; 1469 /* 1470 * Open in non-blocking mode to avoid hangs during open 1471 * and close(waiting for the port to drain). 1472 */ 1473 f->f_file = open(ctty, O_WRONLY | O_NONBLOCK, 0); 1474 1475 if (f->f_file >= 0) { 1476 f->f_lasttime = *timestamp; 1477 fprintlog_first(f, hostname, app_name, procid, msgid, 1478 structured_data, msg, flags); 1479 close(f->f_file); 1480 f->f_file = -1; 1481 } 1482 return; 1483 } 1484 1485 /* 1486 * Store all of the fields of the message, except the timestamp, 1487 * in a single string. This string is used to detect duplicate 1488 * messages. 1489 */ 1490 assert(hostname != NULL); 1491 assert(msg != NULL); 1492 savedlen = snprintf(saved, sizeof(saved), 1493 "%d %s %s %s %s %s %s", pri, hostname, 1494 app_name == NULL ? "-" : app_name, procid == NULL ? "-" : procid, 1495 msgid == NULL ? "-" : msgid, 1496 structured_data == NULL ? "-" : structured_data, msg); 1497 1498 STAILQ_FOREACH(f, &fhead, next) { 1499 /* skip messages that are incorrect priority */ 1500 if (!(((f->f_pcmp[fac] & PRI_EQ) && (f->f_pmask[fac] == prilev)) 1501 ||((f->f_pcmp[fac] & PRI_LT) && (f->f_pmask[fac] < prilev)) 1502 ||((f->f_pcmp[fac] & PRI_GT) && (f->f_pmask[fac] > prilev)) 1503 ) 1504 || f->f_pmask[fac] == INTERNAL_NOPRI) 1505 continue; 1506 1507 /* skip messages with the incorrect hostname */ 1508 if (skip_message(hostname, f->f_host, 0)) 1509 continue; 1510 1511 /* skip messages with the incorrect program name */ 1512 if (skip_message(app_name == NULL ? "" : app_name, 1513 f->f_program, 1)) 1514 continue; 1515 1516 /* skip message to console if it has already been printed */ 1517 if (f->f_type == F_CONSOLE && (flags & IGN_CONS)) 1518 continue; 1519 1520 /* don't output marks to recently written files */ 1521 if ((flags & MARK) && (now - f->f_time) < MarkInterval / 2) 1522 continue; 1523 1524 /* 1525 * suppress duplicate lines to this file 1526 */ 1527 if (no_compress - (f->f_type != F_PIPE) < 1 && 1528 (flags & MARK) == 0 && savedlen == f->f_prevlen && 1529 strcmp(saved, f->f_prevline) == 0) { 1530 f->f_lasttime = *timestamp; 1531 f->f_prevcount++; 1532 dprintf("msg repeated %d times, %ld sec of %d\n", 1533 f->f_prevcount, (long)(now - f->f_time), 1534 repeatinterval[f->f_repeatcount]); 1535 /* 1536 * If domark would have logged this by now, 1537 * flush it now (so we don't hold isolated messages), 1538 * but back off so we'll flush less often 1539 * in the future. 1540 */ 1541 if (now > REPEATTIME(f)) { 1542 fprintlog_successive(f, flags); 1543 BACKOFF(f); 1544 } 1545 } else { 1546 /* new line, save it */ 1547 if (f->f_prevcount) 1548 fprintlog_successive(f, 0); 1549 f->f_repeatcount = 0; 1550 f->f_prevpri = pri; 1551 f->f_lasttime = *timestamp; 1552 static_assert(sizeof(f->f_prevline) == sizeof(saved), 1553 "Space to store saved line incorrect"); 1554 (void)strcpy(f->f_prevline, saved); 1555 f->f_prevlen = savedlen; 1556 fprintlog_first(f, hostname, app_name, procid, msgid, 1557 structured_data, msg, flags); 1558 } 1559 } 1560 } 1561 1562 static void 1563 dofsync(void) 1564 { 1565 struct filed *f; 1566 1567 STAILQ_FOREACH(f, &fhead, next) { 1568 if ((f->f_type == F_FILE) && 1569 (f->f_flags & FFLAG_NEEDSYNC)) { 1570 f->f_flags &= ~FFLAG_NEEDSYNC; 1571 (void)fsync(f->f_file); 1572 } 1573 } 1574 } 1575 1576 /* 1577 * List of iovecs to which entries can be appended. 1578 * Used for constructing the message to be logged. 1579 */ 1580 struct iovlist { 1581 struct iovec iov[TTYMSG_IOV_MAX]; 1582 size_t iovcnt; 1583 size_t totalsize; 1584 }; 1585 1586 static void 1587 iovlist_init(struct iovlist *il) 1588 { 1589 1590 il->iovcnt = 0; 1591 il->totalsize = 0; 1592 } 1593 1594 static void 1595 iovlist_append(struct iovlist *il, const char *str) 1596 { 1597 size_t size; 1598 1599 /* Discard components if we've run out of iovecs. */ 1600 if (il->iovcnt < nitems(il->iov)) { 1601 size = strlen(str); 1602 il->iov[il->iovcnt++] = (struct iovec){ 1603 .iov_base = __DECONST(char *, str), 1604 .iov_len = size, 1605 }; 1606 il->totalsize += size; 1607 } 1608 } 1609 1610 static void 1611 iovlist_truncate(struct iovlist *il, size_t size) 1612 { 1613 struct iovec *last; 1614 size_t diff; 1615 1616 while (size > il->totalsize) { 1617 diff = size - il->totalsize; 1618 last = &il->iov[il->iovcnt - 1]; 1619 if (diff >= last->iov_len) { 1620 /* Remove the last iovec entirely. */ 1621 --il->iovcnt; 1622 il->totalsize -= last->iov_len; 1623 } else { 1624 /* Remove the last iovec partially. */ 1625 last->iov_len -= diff; 1626 il->totalsize -= diff; 1627 } 1628 } 1629 } 1630 1631 static void 1632 fprintlog_write(struct filed *f, struct iovlist *il, int flags) 1633 { 1634 struct msghdr msghdr; 1635 struct addrinfo *r; 1636 struct socklist *sl; 1637 const char *msgret; 1638 ssize_t lsent; 1639 1640 switch (f->f_type) { 1641 case F_FORW: 1642 /* Truncate messages to RFC 5426 recommended size. */ 1643 dprintf(" %s", f->fu_forw_hname); 1644 switch (f->fu_forw_addr->ai_addr->sa_family) { 1645 #ifdef INET 1646 case AF_INET: 1647 dprintf(":%d\n", 1648 ntohs(satosin(f->fu_forw_addr->ai_addr)->sin_port)); 1649 iovlist_truncate(il, 480); 1650 break; 1651 #endif 1652 #ifdef INET6 1653 case AF_INET6: 1654 dprintf(":%d\n", 1655 ntohs(satosin6(f->fu_forw_addr->ai_addr)->sin6_port)); 1656 iovlist_truncate(il, 1180); 1657 break; 1658 #endif 1659 default: 1660 dprintf("\n"); 1661 } 1662 1663 lsent = 0; 1664 for (r = f->fu_forw_addr; r; r = r->ai_next) { 1665 memset(&msghdr, 0, sizeof(msghdr)); 1666 msghdr.msg_name = r->ai_addr; 1667 msghdr.msg_namelen = r->ai_addrlen; 1668 msghdr.msg_iov = il->iov; 1669 msghdr.msg_iovlen = il->iovcnt; 1670 STAILQ_FOREACH(sl, &shead, next) { 1671 if (sl->sl_ss.ss_family == AF_LOCAL || 1672 sl->sl_ss.ss_family == AF_UNSPEC || 1673 sl->sl_socket < 0) 1674 continue; 1675 lsent = sendmsg(sl->sl_socket, &msghdr, 0); 1676 if (lsent == (ssize_t)il->totalsize) 1677 break; 1678 } 1679 if (lsent == (ssize_t)il->totalsize && !send_to_all) 1680 break; 1681 } 1682 dprintf("lsent/totalsize: %zd/%zu\n", lsent, il->totalsize); 1683 if (lsent != (ssize_t)il->totalsize) { 1684 int e = errno; 1685 logerror("sendto"); 1686 errno = e; 1687 switch (errno) { 1688 case ENOBUFS: 1689 case ENETDOWN: 1690 case ENETUNREACH: 1691 case EHOSTUNREACH: 1692 case EHOSTDOWN: 1693 case EADDRNOTAVAIL: 1694 break; 1695 /* case EBADF: */ 1696 /* case EACCES: */ 1697 /* case ENOTSOCK: */ 1698 /* case EFAULT: */ 1699 /* case EMSGSIZE: */ 1700 /* case EAGAIN: */ 1701 /* case ENOBUFS: */ 1702 /* case ECONNREFUSED: */ 1703 default: 1704 dprintf("removing entry: errno=%d\n", e); 1705 f->f_type = F_UNUSED; 1706 break; 1707 } 1708 } 1709 break; 1710 1711 case F_FILE: 1712 dprintf(" %s\n", f->fu_fname); 1713 iovlist_append(il, "\n"); 1714 if (writev(f->f_file, il->iov, il->iovcnt) < 0) { 1715 /* 1716 * If writev(2) fails for potentially transient errors 1717 * like the filesystem being full, ignore it. 1718 * Otherwise remove this logfile from the list. 1719 */ 1720 if (errno != ENOSPC) { 1721 int e = errno; 1722 close_filed(f); 1723 errno = e; 1724 logerror(f->fu_fname); 1725 } 1726 } else if ((flags & SYNC_FILE) && (f->f_flags & FFLAG_SYNC)) { 1727 f->f_flags |= FFLAG_NEEDSYNC; 1728 needdofsync = 1; 1729 } 1730 break; 1731 1732 case F_PIPE: 1733 dprintf(" %s\n", f->fu_pipe_pname); 1734 iovlist_append(il, "\n"); 1735 if (f->fu_pipe_pid == 0) { 1736 if ((f->f_file = p_open(f->fu_pipe_pname, 1737 &f->fu_pipe_pid)) < 0) { 1738 logerror(f->fu_pipe_pname); 1739 break; 1740 } 1741 } 1742 if (writev(f->f_file, il->iov, il->iovcnt) < 0) { 1743 int e = errno; 1744 1745 deadq_enter(f->fu_pipe_pid, f->fu_pipe_pname); 1746 close_filed(f); 1747 errno = e; 1748 logerror(f->fu_pipe_pname); 1749 } 1750 break; 1751 1752 case F_CONSOLE: 1753 if (flags & IGN_CONS) { 1754 dprintf(" (ignored)\n"); 1755 break; 1756 } 1757 /* FALLTHROUGH */ 1758 1759 case F_TTY: 1760 dprintf(" %s%s\n", _PATH_DEV, f->fu_fname); 1761 iovlist_append(il, "\r\n"); 1762 errno = 0; /* ttymsg() only sometimes returns an errno */ 1763 if ((msgret = ttymsg(il->iov, il->iovcnt, f->fu_fname, 10))) { 1764 f->f_type = F_UNUSED; 1765 logerror(msgret); 1766 } 1767 break; 1768 1769 case F_USERS: 1770 case F_WALL: 1771 dprintf("\n"); 1772 iovlist_append(il, "\r\n"); 1773 wallmsg(f, il->iov, il->iovcnt); 1774 break; 1775 } 1776 } 1777 1778 static void 1779 fprintlog_rfc5424(struct filed *f, const char *hostname, const char *app_name, 1780 const char *procid, const char *msgid, const char *structured_data, 1781 const char *msg, int flags) 1782 { 1783 struct iovlist il; 1784 suseconds_t usec; 1785 int i; 1786 char timebuf[33], priority_number[5]; 1787 1788 iovlist_init(&il); 1789 if (f->f_type == F_WALL) 1790 iovlist_append(&il, "\r\n\aMessage from syslogd ...\r\n"); 1791 iovlist_append(&il, "<"); 1792 snprintf(priority_number, sizeof(priority_number), "%d", f->f_prevpri); 1793 iovlist_append(&il, priority_number); 1794 iovlist_append(&il, ">1 "); 1795 if (strftime(timebuf, sizeof(timebuf), "%FT%T.______%z", 1796 &f->f_lasttime.tm) == sizeof(timebuf) - 2) { 1797 /* Add colon to the time zone offset, which %z doesn't do. */ 1798 timebuf[32] = '\0'; 1799 timebuf[31] = timebuf[30]; 1800 timebuf[30] = timebuf[29]; 1801 timebuf[29] = ':'; 1802 1803 /* Overwrite space for microseconds with actual value. */ 1804 usec = f->f_lasttime.usec; 1805 for (i = 25; i >= 20; --i) { 1806 timebuf[i] = usec % 10 + '0'; 1807 usec /= 10; 1808 } 1809 iovlist_append(&il, timebuf); 1810 } else 1811 iovlist_append(&il, "-"); 1812 iovlist_append(&il, " "); 1813 iovlist_append(&il, hostname); 1814 iovlist_append(&il, " "); 1815 iovlist_append(&il, app_name == NULL ? "-" : app_name); 1816 iovlist_append(&il, " "); 1817 iovlist_append(&il, procid == NULL ? "-" : procid); 1818 iovlist_append(&il, " "); 1819 iovlist_append(&il, msgid == NULL ? "-" : msgid); 1820 iovlist_append(&il, " "); 1821 iovlist_append(&il, structured_data == NULL ? "-" : structured_data); 1822 iovlist_append(&il, " "); 1823 iovlist_append(&il, msg); 1824 1825 fprintlog_write(f, &il, flags); 1826 } 1827 1828 static void 1829 fprintlog_rfc3164(struct filed *f, const char *hostname, const char *app_name, 1830 const char *procid, const char *msg, int flags) 1831 { 1832 struct iovlist il; 1833 const CODE *c; 1834 int facility, priority; 1835 char timebuf[RFC3164_DATELEN + 1], facility_number[5], 1836 priority_number[5]; 1837 bool facility_found, priority_found; 1838 1839 if (strftime(timebuf, sizeof(timebuf), RFC3164_DATEFMT, 1840 &f->f_lasttime.tm) == 0) 1841 timebuf[0] = '\0'; 1842 1843 iovlist_init(&il); 1844 switch (f->f_type) { 1845 case F_FORW: 1846 /* Message forwarded over the network. */ 1847 iovlist_append(&il, "<"); 1848 snprintf(priority_number, sizeof(priority_number), "%d", 1849 f->f_prevpri); 1850 iovlist_append(&il, priority_number); 1851 iovlist_append(&il, ">"); 1852 iovlist_append(&il, timebuf); 1853 if (strcasecmp(hostname, LocalHostName) != 0) { 1854 iovlist_append(&il, " Forwarded from "); 1855 iovlist_append(&il, hostname); 1856 iovlist_append(&il, ":"); 1857 } 1858 iovlist_append(&il, " "); 1859 break; 1860 1861 case F_WALL: 1862 /* Message written to terminals. */ 1863 iovlist_append(&il, "\r\n\aMessage from syslogd@"); 1864 iovlist_append(&il, hostname); 1865 iovlist_append(&il, " at "); 1866 iovlist_append(&il, timebuf); 1867 iovlist_append(&il, " ...\r\n"); 1868 break; 1869 1870 default: 1871 /* Message written to files. */ 1872 iovlist_append(&il, timebuf); 1873 iovlist_append(&il, " "); 1874 iovlist_append(&il, hostname); 1875 iovlist_append(&il, " "); 1876 1877 if (LogFacPri) { 1878 iovlist_append(&il, "<"); 1879 1880 facility = f->f_prevpri & LOG_FACMASK; 1881 facility_found = false; 1882 if (LogFacPri > 1) { 1883 for (c = facilitynames; c->c_name; c++) { 1884 if (c->c_val == facility) { 1885 iovlist_append(&il, c->c_name); 1886 facility_found = true; 1887 break; 1888 } 1889 } 1890 } 1891 if (!facility_found) { 1892 snprintf(facility_number, 1893 sizeof(facility_number), "%d", 1894 LOG_FAC(facility)); 1895 iovlist_append(&il, facility_number); 1896 } 1897 1898 iovlist_append(&il, "."); 1899 1900 priority = LOG_PRI(f->f_prevpri); 1901 priority_found = false; 1902 if (LogFacPri > 1) { 1903 for (c = prioritynames; c->c_name; c++) { 1904 if (c->c_val == priority) { 1905 iovlist_append(&il, c->c_name); 1906 priority_found = true; 1907 break; 1908 } 1909 } 1910 } 1911 if (!priority_found) { 1912 snprintf(priority_number, 1913 sizeof(priority_number), "%d", priority); 1914 iovlist_append(&il, priority_number); 1915 } 1916 1917 iovlist_append(&il, "> "); 1918 } 1919 break; 1920 } 1921 1922 /* Message body with application name and process ID prefixed. */ 1923 if (app_name != NULL) { 1924 iovlist_append(&il, app_name); 1925 if (procid != NULL) { 1926 iovlist_append(&il, "["); 1927 iovlist_append(&il, procid); 1928 iovlist_append(&il, "]"); 1929 } 1930 iovlist_append(&il, ": "); 1931 } 1932 iovlist_append(&il, msg); 1933 1934 fprintlog_write(f, &il, flags); 1935 } 1936 1937 static void 1938 fprintlog_first(struct filed *f, const char *hostname, const char *app_name, 1939 const char *procid, const char *msgid __unused, 1940 const char *structured_data __unused, const char *msg, int flags) 1941 { 1942 1943 dprintf("Logging to %s", TypeNames[f->f_type]); 1944 f->f_time = now; 1945 f->f_prevcount = 0; 1946 if (f->f_type == F_UNUSED) { 1947 dprintf("\n"); 1948 return; 1949 } 1950 1951 if (RFC3164OutputFormat) 1952 fprintlog_rfc3164(f, hostname, app_name, procid, msg, flags); 1953 else 1954 fprintlog_rfc5424(f, hostname, app_name, procid, msgid, 1955 structured_data, msg, flags); 1956 } 1957 1958 /* 1959 * Prints a message to a log file that the previously logged message was 1960 * received multiple times. 1961 */ 1962 static void 1963 fprintlog_successive(struct filed *f, int flags) 1964 { 1965 char msg[100]; 1966 1967 assert(f->f_prevcount > 0); 1968 snprintf(msg, sizeof(msg), "last message repeated %d times", 1969 f->f_prevcount); 1970 fprintlog_first(f, LocalHostName, "syslogd", NULL, NULL, NULL, msg, 1971 flags); 1972 } 1973 1974 /* 1975 * WALLMSG -- Write a message to the world at large 1976 * 1977 * Write the specified message to either the entire 1978 * world, or a list of approved users. 1979 */ 1980 static void 1981 wallmsg(struct filed *f, struct iovec *iov, const int iovlen) 1982 { 1983 static int reenter; /* avoid calling ourselves */ 1984 struct utmpx *ut; 1985 int i; 1986 const char *p; 1987 1988 if (reenter++) 1989 return; 1990 setutxent(); 1991 /* NOSTRICT */ 1992 while ((ut = getutxent()) != NULL) { 1993 if (ut->ut_type != USER_PROCESS) 1994 continue; 1995 if (f->f_type == F_WALL) { 1996 if ((p = ttymsg(iov, iovlen, ut->ut_line, 1997 TTYMSGTIME)) != NULL) { 1998 errno = 0; /* already in msg */ 1999 logerror(p); 2000 } 2001 continue; 2002 } 2003 /* should we send the message to this user? */ 2004 for (i = 0; i < MAXUNAMES; i++) { 2005 if (!f->fu_uname[i][0]) 2006 break; 2007 if (!strcmp(f->fu_uname[i], ut->ut_user)) { 2008 if ((p = ttymsg_check(iov, iovlen, ut->ut_line, 2009 TTYMSGTIME)) != NULL) { 2010 errno = 0; /* already in msg */ 2011 logerror(p); 2012 } 2013 break; 2014 } 2015 } 2016 } 2017 endutxent(); 2018 reenter = 0; 2019 } 2020 2021 /* 2022 * Wrapper routine for ttymsg() that checks the terminal for messages enabled. 2023 */ 2024 static const char * 2025 ttymsg_check(struct iovec *iov, int iovcnt, char *line, int tmout) 2026 { 2027 static char device[1024]; 2028 static char errbuf[1024]; 2029 struct stat sb; 2030 2031 (void) snprintf(device, sizeof(device), "%s%s", _PATH_DEV, line); 2032 2033 if (stat(device, &sb) < 0) { 2034 (void) snprintf(errbuf, sizeof(errbuf), 2035 "%s: %s", device, strerror(errno)); 2036 return (errbuf); 2037 } 2038 if ((sb.st_mode & S_IWGRP) == 0) 2039 /* Messages disabled. */ 2040 return (NULL); 2041 return ttymsg(iov, iovcnt, line, tmout); 2042 } 2043 2044 static void 2045 reapchild(int signo __unused) 2046 { 2047 int status; 2048 pid_t pid; 2049 struct filed *f; 2050 2051 while ((pid = wait3(&status, WNOHANG, (struct rusage *)NULL)) > 0) { 2052 /* First, look if it's a process from the dead queue. */ 2053 if (deadq_removebypid(pid)) 2054 continue; 2055 2056 /* Now, look in list of active processes. */ 2057 STAILQ_FOREACH(f, &fhead, next) { 2058 if (f->f_type == F_PIPE && 2059 f->fu_pipe_pid == pid) { 2060 close_filed(f); 2061 log_deadchild(pid, status, f->fu_pipe_pname); 2062 break; 2063 } 2064 } 2065 } 2066 WantReapchild = 0; 2067 } 2068 2069 /* 2070 * Return a printable representation of a host address. 2071 */ 2072 static const char * 2073 cvthname(struct sockaddr *f) 2074 { 2075 int error, hl; 2076 static char hname[NI_MAXHOST], ip[NI_MAXHOST]; 2077 2078 dprintf("cvthname(%d) len = %d\n", f->sa_family, f->sa_len); 2079 error = getnameinfo(f, f->sa_len, ip, sizeof(ip), NULL, 0, 2080 NI_NUMERICHOST); 2081 if (error) { 2082 dprintf("Malformed from address %s\n", gai_strerror(error)); 2083 return ("???"); 2084 } 2085 dprintf("cvthname(%s)\n", ip); 2086 2087 if (!resolve) 2088 return (ip); 2089 2090 error = getnameinfo(f, f->sa_len, hname, sizeof(hname), 2091 NULL, 0, NI_NAMEREQD); 2092 if (error) { 2093 dprintf("Host name for your address (%s) unknown\n", ip); 2094 return (ip); 2095 } 2096 hl = strlen(hname); 2097 if (hl > 0 && hname[hl-1] == '.') 2098 hname[--hl] = '\0'; 2099 trimdomain(hname, hl); 2100 return (hname); 2101 } 2102 2103 static void 2104 dodie(int signo) 2105 { 2106 2107 WantDie = signo; 2108 } 2109 2110 static void 2111 domark(int signo __unused) 2112 { 2113 2114 MarkSet = 1; 2115 } 2116 2117 /* 2118 * Print syslogd errors some place. 2119 */ 2120 static void 2121 logerror(const char *msg) 2122 { 2123 char buf[512]; 2124 static int recursed = 0; 2125 2126 /* If there's an error while trying to log an error, give up. */ 2127 if (recursed) 2128 return; 2129 recursed++; 2130 if (errno != 0) { 2131 (void)snprintf(buf, sizeof(buf), "%s: %s", msg, 2132 strerror(errno)); 2133 msg = buf; 2134 } 2135 errno = 0; 2136 dprintf("%s\n", buf); 2137 logmsg(LOG_SYSLOG|LOG_ERR, NULL, LocalHostName, "syslogd", NULL, NULL, 2138 NULL, msg, 0); 2139 recursed--; 2140 } 2141 2142 static void 2143 die(int signo) 2144 { 2145 struct filed *f; 2146 struct socklist *sl; 2147 char buf[100]; 2148 2149 STAILQ_FOREACH(f, &fhead, next) { 2150 /* flush any pending output */ 2151 if (f->f_prevcount) 2152 fprintlog_successive(f, 0); 2153 if (f->f_type == F_PIPE && f->fu_pipe_pid > 0) 2154 close_filed(f); 2155 } 2156 if (signo) { 2157 dprintf("syslogd: exiting on signal %d\n", signo); 2158 (void)snprintf(buf, sizeof(buf), "exiting on signal %d", signo); 2159 errno = 0; 2160 logerror(buf); 2161 } 2162 STAILQ_FOREACH(sl, &shead, next) { 2163 if (sl->sl_ss.ss_family == AF_LOCAL) 2164 unlink(sl->sl_peer->pe_name); 2165 } 2166 pidfile_remove(pfh); 2167 2168 exit(1); 2169 } 2170 2171 static int 2172 configfiles(const struct dirent *dp) 2173 { 2174 const char *p; 2175 size_t ext_len; 2176 2177 if (dp->d_name[0] == '.') 2178 return (0); 2179 2180 ext_len = sizeof(include_ext) -1; 2181 2182 if (dp->d_namlen <= ext_len) 2183 return (0); 2184 2185 p = &dp->d_name[dp->d_namlen - ext_len]; 2186 if (strcmp(p, include_ext) != 0) 2187 return (0); 2188 2189 return (1); 2190 } 2191 2192 static void 2193 readconfigfile(FILE *cf, int allow_includes) 2194 { 2195 FILE *cf2; 2196 struct filed *f; 2197 struct dirent **ent; 2198 char cline[LINE_MAX]; 2199 char host[MAXHOSTNAMELEN]; 2200 char prog[LINE_MAX]; 2201 char file[MAXPATHLEN]; 2202 char *p, *tmp; 2203 int i, nents; 2204 size_t include_len; 2205 2206 /* 2207 * Foreach line in the conf table, open that file. 2208 */ 2209 include_len = sizeof(include_str) -1; 2210 (void)strlcpy(host, "*", sizeof(host)); 2211 (void)strlcpy(prog, "*", sizeof(prog)); 2212 while (fgets(cline, sizeof(cline), cf) != NULL) { 2213 /* 2214 * check for end-of-section, comments, strip off trailing 2215 * spaces and newline character. #!prog is treated specially: 2216 * following lines apply only to that program. 2217 */ 2218 for (p = cline; isspace(*p); ++p) 2219 continue; 2220 if (*p == 0) 2221 continue; 2222 if (allow_includes && 2223 strncmp(p, include_str, include_len) == 0 && 2224 isspace(p[include_len])) { 2225 p += include_len; 2226 while (isspace(*p)) 2227 p++; 2228 tmp = p; 2229 while (*tmp != '\0' && !isspace(*tmp)) 2230 tmp++; 2231 *tmp = '\0'; 2232 dprintf("Trying to include files in '%s'\n", p); 2233 nents = scandir(p, &ent, configfiles, alphasort); 2234 if (nents == -1) { 2235 dprintf("Unable to open '%s': %s\n", p, 2236 strerror(errno)); 2237 continue; 2238 } 2239 for (i = 0; i < nents; i++) { 2240 if (snprintf(file, sizeof(file), "%s/%s", p, 2241 ent[i]->d_name) >= (int)sizeof(file)) { 2242 dprintf("ignoring path too long: " 2243 "'%s/%s'\n", p, ent[i]->d_name); 2244 free(ent[i]); 2245 continue; 2246 } 2247 free(ent[i]); 2248 cf2 = fopen(file, "r"); 2249 if (cf2 == NULL) 2250 continue; 2251 dprintf("reading %s\n", file); 2252 readconfigfile(cf2, 0); 2253 fclose(cf2); 2254 } 2255 free(ent); 2256 continue; 2257 } 2258 if (*p == '#') { 2259 p++; 2260 if (*p != '!' && *p != '+' && *p != '-') 2261 continue; 2262 } 2263 if (*p == '+' || *p == '-') { 2264 host[0] = *p++; 2265 while (isspace(*p)) 2266 p++; 2267 if ((!*p) || (*p == '*')) { 2268 (void)strlcpy(host, "*", sizeof(host)); 2269 continue; 2270 } 2271 if (*p == '@') 2272 p = LocalHostName; 2273 for (i = 1; i < MAXHOSTNAMELEN - 1; i++) { 2274 if (!isalnum(*p) && *p != '.' && *p != '-' 2275 && *p != ',' && *p != ':' && *p != '%') 2276 break; 2277 host[i] = *p++; 2278 } 2279 host[i] = '\0'; 2280 continue; 2281 } 2282 if (*p == '!') { 2283 p++; 2284 while (isspace(*p)) p++; 2285 if ((!*p) || (*p == '*')) { 2286 (void)strlcpy(prog, "*", sizeof(prog)); 2287 continue; 2288 } 2289 for (i = 0; i < LINE_MAX - 1; i++) { 2290 if (!isprint(p[i]) || isspace(p[i])) 2291 break; 2292 prog[i] = p[i]; 2293 } 2294 prog[i] = 0; 2295 continue; 2296 } 2297 for (p = cline + 1; *p != '\0'; p++) { 2298 if (*p != '#') 2299 continue; 2300 if (*(p - 1) == '\\') { 2301 strcpy(p - 1, p); 2302 p--; 2303 continue; 2304 } 2305 *p = '\0'; 2306 break; 2307 } 2308 for (i = strlen(cline) - 1; i >= 0 && isspace(cline[i]); i--) 2309 cline[i] = '\0'; 2310 f = cfline(cline, prog, host); 2311 if (f != NULL) 2312 addfile(f); 2313 free(f); 2314 } 2315 } 2316 2317 static void 2318 sighandler(int signo) 2319 { 2320 2321 /* Send an wake-up signal to the select() loop. */ 2322 write(sigpipe[1], &signo, sizeof(signo)); 2323 } 2324 2325 /* 2326 * INIT -- Initialize syslogd from configuration table 2327 */ 2328 static void 2329 init(int signo) 2330 { 2331 int i; 2332 FILE *cf; 2333 struct filed *f; 2334 char *p; 2335 char oldLocalHostName[MAXHOSTNAMELEN]; 2336 char hostMsg[2*MAXHOSTNAMELEN+40]; 2337 char bootfileMsg[LINE_MAX]; 2338 2339 dprintf("init\n"); 2340 WantInitialize = 0; 2341 2342 /* 2343 * Load hostname (may have changed). 2344 */ 2345 if (signo != 0) 2346 (void)strlcpy(oldLocalHostName, LocalHostName, 2347 sizeof(oldLocalHostName)); 2348 if (gethostname(LocalHostName, sizeof(LocalHostName))) 2349 err(EX_OSERR, "gethostname() failed"); 2350 if ((p = strchr(LocalHostName, '.')) != NULL) { 2351 /* RFC 5424 prefers logging FQDNs. */ 2352 if (RFC3164OutputFormat) 2353 *p = '\0'; 2354 LocalDomain = p + 1; 2355 } else { 2356 LocalDomain = ""; 2357 } 2358 2359 /* 2360 * Load / reload timezone data (in case it changed). 2361 * 2362 * Just calling tzset() again does not work, the timezone code 2363 * caches the result. However, by setting the TZ variable, one 2364 * can defeat the caching and have the timezone code really 2365 * reload the timezone data. Respect any initial setting of 2366 * TZ, in case the system is configured specially. 2367 */ 2368 dprintf("loading timezone data via tzset()\n"); 2369 if (getenv("TZ")) { 2370 tzset(); 2371 } else { 2372 setenv("TZ", ":/etc/localtime", 1); 2373 tzset(); 2374 unsetenv("TZ"); 2375 } 2376 2377 /* 2378 * Close all open log files. 2379 */ 2380 Initialized = 0; 2381 STAILQ_FOREACH(f, &fhead, next) { 2382 /* flush any pending output */ 2383 if (f->f_prevcount) 2384 fprintlog_successive(f, 0); 2385 2386 switch (f->f_type) { 2387 case F_FILE: 2388 case F_FORW: 2389 case F_CONSOLE: 2390 case F_TTY: 2391 close_filed(f); 2392 break; 2393 case F_PIPE: 2394 deadq_enter(f->fu_pipe_pid, f->fu_pipe_pname); 2395 close_filed(f); 2396 break; 2397 } 2398 } 2399 while(!STAILQ_EMPTY(&fhead)) { 2400 f = STAILQ_FIRST(&fhead); 2401 STAILQ_REMOVE_HEAD(&fhead, next); 2402 free(f->f_program); 2403 free(f->f_host); 2404 free(f); 2405 } 2406 2407 /* open the configuration file */ 2408 if ((cf = fopen(ConfFile, "r")) == NULL) { 2409 dprintf("cannot open %s\n", ConfFile); 2410 f = cfline("*.ERR\t/dev/console", "*", "*"); 2411 if (f != NULL) 2412 addfile(f); 2413 free(f); 2414 f = cfline("*.PANIC\t*", "*", "*"); 2415 if (f != NULL) 2416 addfile(f); 2417 free(f); 2418 Initialized = 1; 2419 2420 return; 2421 } 2422 2423 readconfigfile(cf, 1); 2424 2425 /* close the configuration file */ 2426 (void)fclose(cf); 2427 2428 Initialized = 1; 2429 2430 if (Debug) { 2431 int port; 2432 STAILQ_FOREACH(f, &fhead, next) { 2433 for (i = 0; i <= LOG_NFACILITIES; i++) 2434 if (f->f_pmask[i] == INTERNAL_NOPRI) 2435 printf("X "); 2436 else 2437 printf("%d ", f->f_pmask[i]); 2438 printf("%s: ", TypeNames[f->f_type]); 2439 switch (f->f_type) { 2440 case F_FILE: 2441 printf("%s", f->fu_fname); 2442 break; 2443 2444 case F_CONSOLE: 2445 case F_TTY: 2446 printf("%s%s", _PATH_DEV, f->fu_fname); 2447 break; 2448 2449 case F_FORW: 2450 switch (f->fu_forw_addr->ai_addr->sa_family) { 2451 #ifdef INET 2452 case AF_INET: 2453 port = ntohs(satosin(f->fu_forw_addr->ai_addr)->sin_port); 2454 break; 2455 #endif 2456 #ifdef INET6 2457 case AF_INET6: 2458 port = ntohs(satosin6(f->fu_forw_addr->ai_addr)->sin6_port); 2459 break; 2460 #endif 2461 default: 2462 port = 0; 2463 } 2464 if (port != 514) { 2465 printf("%s:%d", 2466 f->fu_forw_hname, port); 2467 } else { 2468 printf("%s", f->fu_forw_hname); 2469 } 2470 break; 2471 2472 case F_PIPE: 2473 printf("%s", f->fu_pipe_pname); 2474 break; 2475 2476 case F_USERS: 2477 for (i = 0; i < MAXUNAMES && *f->fu_uname[i]; i++) 2478 printf("%s, ", f->fu_uname[i]); 2479 break; 2480 } 2481 if (f->f_program) 2482 printf(" (%s)", f->f_program); 2483 printf("\n"); 2484 } 2485 } 2486 2487 logmsg(LOG_SYSLOG | LOG_INFO, NULL, LocalHostName, "syslogd", NULL, 2488 NULL, NULL, "restart", 0); 2489 dprintf("syslogd: restarted\n"); 2490 /* 2491 * Log a change in hostname, but only on a restart. 2492 */ 2493 if (signo != 0 && strcmp(oldLocalHostName, LocalHostName) != 0) { 2494 (void)snprintf(hostMsg, sizeof(hostMsg), 2495 "hostname changed, \"%s\" to \"%s\"", 2496 oldLocalHostName, LocalHostName); 2497 logmsg(LOG_SYSLOG | LOG_INFO, NULL, LocalHostName, "syslogd", 2498 NULL, NULL, NULL, hostMsg, 0); 2499 dprintf("%s\n", hostMsg); 2500 } 2501 /* 2502 * Log the kernel boot file if we aren't going to use it as 2503 * the prefix, and if this is *not* a restart. 2504 */ 2505 if (signo == 0 && !use_bootfile) { 2506 (void)snprintf(bootfileMsg, sizeof(bootfileMsg), 2507 "kernel boot file is %s", bootfile); 2508 logmsg(LOG_KERN | LOG_INFO, NULL, LocalHostName, "syslogd", 2509 NULL, NULL, NULL, bootfileMsg, 0); 2510 dprintf("%s\n", bootfileMsg); 2511 } 2512 } 2513 2514 /* 2515 * Crack a configuration file line 2516 */ 2517 static struct filed * 2518 cfline(const char *line, const char *prog, const char *host) 2519 { 2520 struct filed *f; 2521 struct addrinfo hints, *res; 2522 int error, i, pri, syncfile; 2523 const char *p, *q; 2524 char *bp; 2525 char buf[MAXLINE], ebuf[100]; 2526 2527 dprintf("cfline(\"%s\", f, \"%s\", \"%s\")\n", line, prog, host); 2528 2529 f = calloc(1, sizeof(*f)); 2530 if (f == NULL) { 2531 logerror("malloc"); 2532 exit(1); 2533 } 2534 errno = 0; /* keep strerror() stuff out of logerror messages */ 2535 2536 for (i = 0; i <= LOG_NFACILITIES; i++) 2537 f->f_pmask[i] = INTERNAL_NOPRI; 2538 2539 /* save hostname if any */ 2540 if (host && *host == '*') 2541 host = NULL; 2542 if (host) { 2543 int hl; 2544 2545 f->f_host = strdup(host); 2546 if (f->f_host == NULL) { 2547 logerror("strdup"); 2548 exit(1); 2549 } 2550 hl = strlen(f->f_host); 2551 if (hl > 0 && f->f_host[hl-1] == '.') 2552 f->f_host[--hl] = '\0'; 2553 trimdomain(f->f_host, hl); 2554 } 2555 2556 /* save program name if any */ 2557 if (prog && *prog == '*') 2558 prog = NULL; 2559 if (prog) { 2560 f->f_program = strdup(prog); 2561 if (f->f_program == NULL) { 2562 logerror("strdup"); 2563 exit(1); 2564 } 2565 } 2566 2567 /* scan through the list of selectors */ 2568 for (p = line; *p && *p != '\t' && *p != ' ';) { 2569 int pri_done; 2570 int pri_cmp; 2571 int pri_invert; 2572 2573 /* find the end of this facility name list */ 2574 for (q = p; *q && *q != '\t' && *q != ' ' && *q++ != '.'; ) 2575 continue; 2576 2577 /* get the priority comparison */ 2578 pri_cmp = 0; 2579 pri_done = 0; 2580 pri_invert = 0; 2581 if (*q == '!') { 2582 pri_invert = 1; 2583 q++; 2584 } 2585 while (!pri_done) { 2586 switch (*q) { 2587 case '<': 2588 pri_cmp |= PRI_LT; 2589 q++; 2590 break; 2591 case '=': 2592 pri_cmp |= PRI_EQ; 2593 q++; 2594 break; 2595 case '>': 2596 pri_cmp |= PRI_GT; 2597 q++; 2598 break; 2599 default: 2600 pri_done++; 2601 break; 2602 } 2603 } 2604 2605 /* collect priority name */ 2606 for (bp = buf; *q && !strchr("\t,; ", *q); ) 2607 *bp++ = *q++; 2608 *bp = '\0'; 2609 2610 /* skip cruft */ 2611 while (strchr(",;", *q)) 2612 q++; 2613 2614 /* decode priority name */ 2615 if (*buf == '*') { 2616 pri = LOG_PRIMASK; 2617 pri_cmp = PRI_LT | PRI_EQ | PRI_GT; 2618 } else { 2619 /* Ignore trailing spaces. */ 2620 for (i = strlen(buf) - 1; i >= 0 && buf[i] == ' '; i--) 2621 buf[i] = '\0'; 2622 2623 pri = decode(buf, prioritynames); 2624 if (pri < 0) { 2625 errno = 0; 2626 (void)snprintf(ebuf, sizeof ebuf, 2627 "unknown priority name \"%s\"", buf); 2628 logerror(ebuf); 2629 free(f); 2630 return (NULL); 2631 } 2632 } 2633 if (!pri_cmp) 2634 pri_cmp = (UniquePriority) 2635 ? (PRI_EQ) 2636 : (PRI_EQ | PRI_GT) 2637 ; 2638 if (pri_invert) 2639 pri_cmp ^= PRI_LT | PRI_EQ | PRI_GT; 2640 2641 /* scan facilities */ 2642 while (*p && !strchr("\t.; ", *p)) { 2643 for (bp = buf; *p && !strchr("\t,;. ", *p); ) 2644 *bp++ = *p++; 2645 *bp = '\0'; 2646 2647 if (*buf == '*') { 2648 for (i = 0; i < LOG_NFACILITIES; i++) { 2649 f->f_pmask[i] = pri; 2650 f->f_pcmp[i] = pri_cmp; 2651 } 2652 } else { 2653 i = decode(buf, facilitynames); 2654 if (i < 0) { 2655 errno = 0; 2656 (void)snprintf(ebuf, sizeof ebuf, 2657 "unknown facility name \"%s\"", 2658 buf); 2659 logerror(ebuf); 2660 free(f); 2661 return (NULL); 2662 } 2663 f->f_pmask[i >> 3] = pri; 2664 f->f_pcmp[i >> 3] = pri_cmp; 2665 } 2666 while (*p == ',' || *p == ' ') 2667 p++; 2668 } 2669 2670 p = q; 2671 } 2672 2673 /* skip to action part */ 2674 while (*p == '\t' || *p == ' ') 2675 p++; 2676 2677 if (*p == '-') { 2678 syncfile = 0; 2679 p++; 2680 } else 2681 syncfile = 1; 2682 2683 switch (*p) { 2684 case '@': 2685 { 2686 char *tp; 2687 char endkey = ':'; 2688 /* 2689 * scan forward to see if there is a port defined. 2690 * so we can't use strlcpy.. 2691 */ 2692 i = sizeof(f->fu_forw_hname); 2693 tp = f->fu_forw_hname; 2694 p++; 2695 2696 /* 2697 * an ipv6 address should start with a '[' in that case 2698 * we should scan for a ']' 2699 */ 2700 if (*p == '[') { 2701 p++; 2702 endkey = ']'; 2703 } 2704 while (*p && (*p != endkey) && (i-- > 0)) { 2705 *tp++ = *p++; 2706 } 2707 if (endkey == ']' && *p == endkey) 2708 p++; 2709 *tp = '\0'; 2710 } 2711 /* See if we copied a domain and have a port */ 2712 if (*p == ':') 2713 p++; 2714 else 2715 p = NULL; 2716 2717 hints = (struct addrinfo){ 2718 .ai_family = family, 2719 .ai_socktype = SOCK_DGRAM 2720 }; 2721 error = getaddrinfo(f->fu_forw_hname, 2722 p ? p : "syslog", &hints, &res); 2723 if (error) { 2724 logerror(gai_strerror(error)); 2725 break; 2726 } 2727 f->fu_forw_addr = res; 2728 f->f_type = F_FORW; 2729 break; 2730 2731 case '/': 2732 if ((f->f_file = open(p, logflags, 0600)) < 0) { 2733 f->f_type = F_UNUSED; 2734 logerror(p); 2735 break; 2736 } 2737 if (syncfile) 2738 f->f_flags |= FFLAG_SYNC; 2739 if (isatty(f->f_file)) { 2740 if (strcmp(p, ctty) == 0) 2741 f->f_type = F_CONSOLE; 2742 else 2743 f->f_type = F_TTY; 2744 (void)strlcpy(f->fu_fname, p + sizeof(_PATH_DEV) - 1, 2745 sizeof(f->fu_fname)); 2746 } else { 2747 (void)strlcpy(f->fu_fname, p, sizeof(f->fu_fname)); 2748 f->f_type = F_FILE; 2749 } 2750 break; 2751 2752 case '|': 2753 f->fu_pipe_pid = 0; 2754 (void)strlcpy(f->fu_pipe_pname, p + 1, 2755 sizeof(f->fu_pipe_pname)); 2756 f->f_type = F_PIPE; 2757 break; 2758 2759 case '*': 2760 f->f_type = F_WALL; 2761 break; 2762 2763 default: 2764 for (i = 0; i < MAXUNAMES && *p; i++) { 2765 for (q = p; *q && *q != ','; ) 2766 q++; 2767 (void)strncpy(f->fu_uname[i], p, MAXLOGNAME - 1); 2768 if ((q - p) >= MAXLOGNAME) 2769 f->fu_uname[i][MAXLOGNAME - 1] = '\0'; 2770 else 2771 f->fu_uname[i][q - p] = '\0'; 2772 while (*q == ',' || *q == ' ') 2773 q++; 2774 p = q; 2775 } 2776 f->f_type = F_USERS; 2777 break; 2778 } 2779 return (f); 2780 } 2781 2782 2783 /* 2784 * Decode a symbolic name to a numeric value 2785 */ 2786 static int 2787 decode(const char *name, const CODE *codetab) 2788 { 2789 const CODE *c; 2790 char *p, buf[40]; 2791 2792 if (isdigit(*name)) 2793 return (atoi(name)); 2794 2795 for (p = buf; *name && p < &buf[sizeof(buf) - 1]; p++, name++) { 2796 if (isupper(*name)) 2797 *p = tolower(*name); 2798 else 2799 *p = *name; 2800 } 2801 *p = '\0'; 2802 for (c = codetab; c->c_name; c++) 2803 if (!strcmp(buf, c->c_name)) 2804 return (c->c_val); 2805 2806 return (-1); 2807 } 2808 2809 static void 2810 markit(void) 2811 { 2812 struct filed *f; 2813 struct deadq_entry *dq, *dq0; 2814 2815 now = time((time_t *)NULL); 2816 MarkSeq += TIMERINTVL; 2817 if (MarkSeq >= MarkInterval) { 2818 logmsg(LOG_INFO, NULL, LocalHostName, NULL, NULL, NULL, NULL, 2819 "-- MARK --", MARK); 2820 MarkSeq = 0; 2821 } 2822 2823 STAILQ_FOREACH(f, &fhead, next) { 2824 if (f->f_prevcount && now >= REPEATTIME(f)) { 2825 dprintf("flush %s: repeated %d times, %d sec.\n", 2826 TypeNames[f->f_type], f->f_prevcount, 2827 repeatinterval[f->f_repeatcount]); 2828 fprintlog_successive(f, 0); 2829 BACKOFF(f); 2830 } 2831 } 2832 2833 /* Walk the dead queue, and see if we should signal somebody. */ 2834 TAILQ_FOREACH_SAFE(dq, &deadq_head, dq_entries, dq0) { 2835 switch (dq->dq_timeout) { 2836 case 0: 2837 /* Already signalled once, try harder now. */ 2838 if (kill(dq->dq_pid, SIGKILL) != 0) 2839 (void)deadq_remove(dq); 2840 break; 2841 2842 case 1: 2843 /* 2844 * Timed out on dead queue, send terminate 2845 * signal. Note that we leave the removal 2846 * from the dead queue to reapchild(), which 2847 * will also log the event (unless the process 2848 * didn't even really exist, in case we simply 2849 * drop it from the dead queue). 2850 */ 2851 if (kill(dq->dq_pid, SIGTERM) != 0) 2852 (void)deadq_remove(dq); 2853 else 2854 dq->dq_timeout--; 2855 break; 2856 default: 2857 dq->dq_timeout--; 2858 } 2859 } 2860 MarkSet = 0; 2861 (void)alarm(TIMERINTVL); 2862 } 2863 2864 /* 2865 * fork off and become a daemon, but wait for the child to come online 2866 * before returning to the parent, or we get disk thrashing at boot etc. 2867 * Set a timer so we don't hang forever if it wedges. 2868 */ 2869 static int 2870 waitdaemon(int maxwait) 2871 { 2872 int fd; 2873 int status; 2874 pid_t pid, childpid; 2875 2876 switch (childpid = fork()) { 2877 case -1: 2878 return (-1); 2879 case 0: 2880 break; 2881 default: 2882 signal(SIGALRM, timedout); 2883 alarm(maxwait); 2884 while ((pid = wait3(&status, 0, NULL)) != -1) { 2885 if (WIFEXITED(status)) 2886 errx(1, "child pid %d exited with return code %d", 2887 pid, WEXITSTATUS(status)); 2888 if (WIFSIGNALED(status)) 2889 errx(1, "child pid %d exited on signal %d%s", 2890 pid, WTERMSIG(status), 2891 WCOREDUMP(status) ? " (core dumped)" : 2892 ""); 2893 if (pid == childpid) /* it's gone... */ 2894 break; 2895 } 2896 exit(0); 2897 } 2898 2899 if (setsid() == -1) 2900 return (-1); 2901 2902 (void)chdir("/"); 2903 if ((fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) { 2904 (void)dup2(fd, STDIN_FILENO); 2905 (void)dup2(fd, STDOUT_FILENO); 2906 (void)dup2(fd, STDERR_FILENO); 2907 if (fd > STDERR_FILENO) 2908 (void)close(fd); 2909 } 2910 return (getppid()); 2911 } 2912 2913 /* 2914 * We get a SIGALRM from the child when it's running and finished doing it's 2915 * fsync()'s or O_SYNC writes for all the boot messages. 2916 * 2917 * We also get a signal from the kernel if the timer expires, so check to 2918 * see what happened. 2919 */ 2920 static void 2921 timedout(int sig __unused) 2922 { 2923 int left; 2924 left = alarm(0); 2925 signal(SIGALRM, SIG_DFL); 2926 if (left == 0) 2927 errx(1, "timed out waiting for child"); 2928 else 2929 _exit(0); 2930 } 2931 2932 /* 2933 * Add `s' to the list of allowable peer addresses to accept messages 2934 * from. 2935 * 2936 * `s' is a string in the form: 2937 * 2938 * [*]domainname[:{servicename|portnumber|*}] 2939 * 2940 * or 2941 * 2942 * netaddr/maskbits[:{servicename|portnumber|*}] 2943 * 2944 * Returns -1 on error, 0 if the argument was valid. 2945 */ 2946 static int 2947 allowaddr(char *s) 2948 { 2949 #if defined(INET) || defined(INET6) 2950 char *cp1, *cp2; 2951 struct allowedpeer *ap; 2952 struct servent *se; 2953 int masklen = -1; 2954 struct addrinfo hints, *res = NULL; 2955 #ifdef INET 2956 in_addr_t *addrp, *maskp; 2957 #endif 2958 #ifdef INET6 2959 uint32_t *addr6p, *mask6p; 2960 #endif 2961 char ip[NI_MAXHOST]; 2962 2963 ap = calloc(1, sizeof(*ap)); 2964 if (ap == NULL) 2965 err(1, "malloc failed"); 2966 2967 #ifdef INET6 2968 if (*s != '[' || (cp1 = strchr(s + 1, ']')) == NULL) 2969 #endif 2970 cp1 = s; 2971 if ((cp1 = strrchr(cp1, ':'))) { 2972 /* service/port provided */ 2973 *cp1++ = '\0'; 2974 if (strlen(cp1) == 1 && *cp1 == '*') 2975 /* any port allowed */ 2976 ap->port = 0; 2977 else if ((se = getservbyname(cp1, "udp"))) { 2978 ap->port = ntohs(se->s_port); 2979 } else { 2980 ap->port = strtol(cp1, &cp2, 0); 2981 /* port not numeric */ 2982 if (*cp2 != '\0') 2983 goto err; 2984 } 2985 } else { 2986 if ((se = getservbyname("syslog", "udp"))) 2987 ap->port = ntohs(se->s_port); 2988 else 2989 /* sanity, should not happen */ 2990 ap->port = 514; 2991 } 2992 2993 if ((cp1 = strchr(s, '/')) != NULL && 2994 strspn(cp1 + 1, "0123456789") == strlen(cp1 + 1)) { 2995 *cp1 = '\0'; 2996 if ((masklen = atoi(cp1 + 1)) < 0) 2997 goto err; 2998 } 2999 #ifdef INET6 3000 if (*s == '[') { 3001 cp2 = s + strlen(s) - 1; 3002 if (*cp2 == ']') { 3003 ++s; 3004 *cp2 = '\0'; 3005 } else { 3006 cp2 = NULL; 3007 } 3008 } else { 3009 cp2 = NULL; 3010 } 3011 #endif 3012 hints = (struct addrinfo){ 3013 .ai_family = PF_UNSPEC, 3014 .ai_socktype = SOCK_DGRAM, 3015 .ai_flags = AI_PASSIVE | AI_NUMERICHOST 3016 }; 3017 if (getaddrinfo(s, NULL, &hints, &res) == 0) { 3018 ap->isnumeric = 1; 3019 memcpy(&ap->a_addr, res->ai_addr, res->ai_addrlen); 3020 ap->a_mask = (struct sockaddr_storage){ 3021 .ss_family = res->ai_family, 3022 .ss_len = res->ai_addrlen 3023 }; 3024 switch (res->ai_family) { 3025 #ifdef INET 3026 case AF_INET: 3027 maskp = &sstosin(&ap->a_mask)->sin_addr.s_addr; 3028 addrp = &sstosin(&ap->a_addr)->sin_addr.s_addr; 3029 if (masklen < 0) { 3030 /* use default netmask */ 3031 if (IN_CLASSA(ntohl(*addrp))) 3032 *maskp = htonl(IN_CLASSA_NET); 3033 else if (IN_CLASSB(ntohl(*addrp))) 3034 *maskp = htonl(IN_CLASSB_NET); 3035 else 3036 *maskp = htonl(IN_CLASSC_NET); 3037 } else if (masklen == 0) { 3038 *maskp = 0; 3039 } else if (masklen <= 32) { 3040 /* convert masklen to netmask */ 3041 *maskp = htonl(~((1 << (32 - masklen)) - 1)); 3042 } else { 3043 goto err; 3044 } 3045 /* Lose any host bits in the network number. */ 3046 *addrp &= *maskp; 3047 break; 3048 #endif 3049 #ifdef INET6 3050 case AF_INET6: 3051 if (masklen > 128) 3052 goto err; 3053 3054 if (masklen < 0) 3055 masklen = 128; 3056 mask6p = (uint32_t *)&sstosin6(&ap->a_mask)->sin6_addr.s6_addr32[0]; 3057 addr6p = (uint32_t *)&sstosin6(&ap->a_addr)->sin6_addr.s6_addr32[0]; 3058 /* convert masklen to netmask */ 3059 while (masklen > 0) { 3060 if (masklen < 32) { 3061 *mask6p = 3062 htonl(~(0xffffffff >> masklen)); 3063 *addr6p &= *mask6p; 3064 break; 3065 } else { 3066 *mask6p++ = 0xffffffff; 3067 addr6p++; 3068 masklen -= 32; 3069 } 3070 } 3071 break; 3072 #endif 3073 default: 3074 goto err; 3075 } 3076 freeaddrinfo(res); 3077 } else { 3078 /* arg `s' is domain name */ 3079 ap->isnumeric = 0; 3080 ap->a_name = s; 3081 if (cp1) 3082 *cp1 = '/'; 3083 #ifdef INET6 3084 if (cp2) { 3085 *cp2 = ']'; 3086 --s; 3087 } 3088 #endif 3089 } 3090 STAILQ_INSERT_TAIL(&aphead, ap, next); 3091 3092 if (Debug) { 3093 printf("allowaddr: rule "); 3094 if (ap->isnumeric) { 3095 printf("numeric, "); 3096 getnameinfo(sstosa(&ap->a_addr), 3097 (sstosa(&ap->a_addr))->sa_len, 3098 ip, sizeof ip, NULL, 0, NI_NUMERICHOST); 3099 printf("addr = %s, ", ip); 3100 getnameinfo(sstosa(&ap->a_mask), 3101 (sstosa(&ap->a_mask))->sa_len, 3102 ip, sizeof ip, NULL, 0, NI_NUMERICHOST); 3103 printf("mask = %s; ", ip); 3104 } else { 3105 printf("domainname = %s; ", ap->a_name); 3106 } 3107 printf("port = %d\n", ap->port); 3108 } 3109 #endif 3110 3111 return (0); 3112 err: 3113 if (res != NULL) 3114 freeaddrinfo(res); 3115 free(ap); 3116 return (-1); 3117 } 3118 3119 /* 3120 * Validate that the remote peer has permission to log to us. 3121 */ 3122 static int 3123 validate(struct sockaddr *sa, const char *hname) 3124 { 3125 int i; 3126 char name[NI_MAXHOST], ip[NI_MAXHOST], port[NI_MAXSERV]; 3127 struct allowedpeer *ap; 3128 #ifdef INET 3129 struct sockaddr_in *sin4, *a4p = NULL, *m4p = NULL; 3130 #endif 3131 #ifdef INET6 3132 struct sockaddr_in6 *sin6, *a6p = NULL, *m6p = NULL; 3133 #endif 3134 struct addrinfo hints, *res; 3135 u_short sport; 3136 int num = 0; 3137 3138 STAILQ_FOREACH(ap, &aphead, next) { 3139 num++; 3140 } 3141 dprintf("# of validation rule: %d\n", num); 3142 if (num == 0) 3143 /* traditional behaviour, allow everything */ 3144 return (1); 3145 3146 (void)strlcpy(name, hname, sizeof(name)); 3147 hints = (struct addrinfo){ 3148 .ai_family = PF_UNSPEC, 3149 .ai_socktype = SOCK_DGRAM, 3150 .ai_flags = AI_PASSIVE | AI_NUMERICHOST 3151 }; 3152 if (getaddrinfo(name, NULL, &hints, &res) == 0) 3153 freeaddrinfo(res); 3154 else if (strchr(name, '.') == NULL) { 3155 strlcat(name, ".", sizeof name); 3156 strlcat(name, LocalDomain, sizeof name); 3157 } 3158 if (getnameinfo(sa, sa->sa_len, ip, sizeof(ip), port, sizeof(port), 3159 NI_NUMERICHOST | NI_NUMERICSERV) != 0) 3160 return (0); /* for safety, should not occur */ 3161 dprintf("validate: dgram from IP %s, port %s, name %s;\n", 3162 ip, port, name); 3163 sport = atoi(port); 3164 3165 /* now, walk down the list */ 3166 i = 0; 3167 STAILQ_FOREACH(ap, &aphead, next) { 3168 i++; 3169 if (ap->port != 0 && ap->port != sport) { 3170 dprintf("rejected in rule %d due to port mismatch.\n", 3171 i); 3172 continue; 3173 } 3174 3175 if (ap->isnumeric) { 3176 if (ap->a_addr.ss_family != sa->sa_family) { 3177 dprintf("rejected in rule %d due to address family mismatch.\n", i); 3178 continue; 3179 } 3180 #ifdef INET 3181 else if (ap->a_addr.ss_family == AF_INET) { 3182 sin4 = satosin(sa); 3183 a4p = satosin(&ap->a_addr); 3184 m4p = satosin(&ap->a_mask); 3185 if ((sin4->sin_addr.s_addr & m4p->sin_addr.s_addr) 3186 != a4p->sin_addr.s_addr) { 3187 dprintf("rejected in rule %d due to IP mismatch.\n", i); 3188 continue; 3189 } 3190 } 3191 #endif 3192 #ifdef INET6 3193 else if (ap->a_addr.ss_family == AF_INET6) { 3194 sin6 = satosin6(sa); 3195 a6p = satosin6(&ap->a_addr); 3196 m6p = satosin6(&ap->a_mask); 3197 if (a6p->sin6_scope_id != 0 && 3198 sin6->sin6_scope_id != a6p->sin6_scope_id) { 3199 dprintf("rejected in rule %d due to scope mismatch.\n", i); 3200 continue; 3201 } 3202 if (IN6_ARE_MASKED_ADDR_EQUAL(&sin6->sin6_addr, 3203 &a6p->sin6_addr, &m6p->sin6_addr) != 0) { 3204 dprintf("rejected in rule %d due to IP mismatch.\n", i); 3205 continue; 3206 } 3207 } 3208 #endif 3209 else 3210 continue; 3211 } else { 3212 if (fnmatch(ap->a_name, name, FNM_NOESCAPE) == 3213 FNM_NOMATCH) { 3214 dprintf("rejected in rule %d due to name " 3215 "mismatch.\n", i); 3216 continue; 3217 } 3218 } 3219 dprintf("accepted in rule %d.\n", i); 3220 return (1); /* hooray! */ 3221 } 3222 return (0); 3223 } 3224 3225 /* 3226 * Fairly similar to popen(3), but returns an open descriptor, as 3227 * opposed to a FILE *. 3228 */ 3229 static int 3230 p_open(const char *prog, pid_t *rpid) 3231 { 3232 int pfd[2], nulldesc; 3233 pid_t pid; 3234 char *argv[4]; /* sh -c cmd NULL */ 3235 char errmsg[200]; 3236 3237 if (pipe(pfd) == -1) 3238 return (-1); 3239 if ((nulldesc = open(_PATH_DEVNULL, O_RDWR)) == -1) 3240 /* we are royally screwed anyway */ 3241 return (-1); 3242 3243 switch ((pid = fork())) { 3244 case -1: 3245 close(nulldesc); 3246 return (-1); 3247 3248 case 0: 3249 (void)setsid(); /* Avoid catching SIGHUPs. */ 3250 argv[0] = strdup("sh"); 3251 argv[1] = strdup("-c"); 3252 argv[2] = strdup(prog); 3253 argv[3] = NULL; 3254 if (argv[0] == NULL || argv[1] == NULL || argv[2] == NULL) { 3255 logerror("strdup"); 3256 exit(1); 3257 } 3258 3259 alarm(0); 3260 3261 /* Restore signals marked as SIG_IGN. */ 3262 (void)signal(SIGINT, SIG_DFL); 3263 (void)signal(SIGQUIT, SIG_DFL); 3264 (void)signal(SIGPIPE, SIG_DFL); 3265 3266 dup2(pfd[0], STDIN_FILENO); 3267 dup2(nulldesc, STDOUT_FILENO); 3268 dup2(nulldesc, STDERR_FILENO); 3269 closefrom(STDERR_FILENO + 1); 3270 3271 (void)execvp(_PATH_BSHELL, argv); 3272 _exit(255); 3273 } 3274 close(nulldesc); 3275 close(pfd[0]); 3276 /* 3277 * Avoid blocking on a hung pipe. With O_NONBLOCK, we are 3278 * supposed to get an EWOULDBLOCK on writev(2), which is 3279 * caught by the logic above anyway, which will in turn close 3280 * the pipe, and fork a new logging subprocess if necessary. 3281 * The stale subprocess will be killed some time later unless 3282 * it terminated itself due to closing its input pipe (so we 3283 * get rid of really dead puppies). 3284 */ 3285 if (fcntl(pfd[1], F_SETFL, O_NONBLOCK) == -1) { 3286 /* This is bad. */ 3287 (void)snprintf(errmsg, sizeof errmsg, 3288 "Warning: cannot change pipe to PID %d to " 3289 "non-blocking behaviour.", 3290 (int)pid); 3291 logerror(errmsg); 3292 } 3293 *rpid = pid; 3294 return (pfd[1]); 3295 } 3296 3297 static void 3298 deadq_enter(pid_t pid, const char *name) 3299 { 3300 struct deadq_entry *dq; 3301 int status; 3302 3303 if (pid == 0) 3304 return; 3305 /* 3306 * Be paranoid, if we can't signal the process, don't enter it 3307 * into the dead queue (perhaps it's already dead). If possible, 3308 * we try to fetch and log the child's status. 3309 */ 3310 if (kill(pid, 0) != 0) { 3311 if (waitpid(pid, &status, WNOHANG) > 0) 3312 log_deadchild(pid, status, name); 3313 return; 3314 } 3315 3316 dq = malloc(sizeof(*dq)); 3317 if (dq == NULL) { 3318 logerror("malloc"); 3319 exit(1); 3320 } 3321 *dq = (struct deadq_entry){ 3322 .dq_pid = pid, 3323 .dq_timeout = DQ_TIMO_INIT 3324 }; 3325 TAILQ_INSERT_TAIL(&deadq_head, dq, dq_entries); 3326 } 3327 3328 static int 3329 deadq_remove(struct deadq_entry *dq) 3330 { 3331 if (dq != NULL) { 3332 TAILQ_REMOVE(&deadq_head, dq, dq_entries); 3333 free(dq); 3334 return (1); 3335 } 3336 3337 return (0); 3338 } 3339 3340 static int 3341 deadq_removebypid(pid_t pid) 3342 { 3343 struct deadq_entry *dq; 3344 3345 TAILQ_FOREACH(dq, &deadq_head, dq_entries) { 3346 if (dq->dq_pid == pid) 3347 break; 3348 } 3349 return (deadq_remove(dq)); 3350 } 3351 3352 static void 3353 log_deadchild(pid_t pid, int status, const char *name) 3354 { 3355 int code; 3356 char buf[256]; 3357 const char *reason; 3358 3359 errno = 0; /* Keep strerror() stuff out of logerror messages. */ 3360 if (WIFSIGNALED(status)) { 3361 reason = "due to signal"; 3362 code = WTERMSIG(status); 3363 } else { 3364 reason = "with status"; 3365 code = WEXITSTATUS(status); 3366 if (code == 0) 3367 return; 3368 } 3369 (void)snprintf(buf, sizeof buf, 3370 "Logging subprocess %d (%s) exited %s %d.", 3371 pid, name, reason, code); 3372 logerror(buf); 3373 } 3374 3375 static int 3376 socksetup(struct peer *pe) 3377 { 3378 struct addrinfo hints, *res, *res0; 3379 int error; 3380 char *cp; 3381 int (*sl_recv)(struct socklist *); 3382 /* 3383 * We have to handle this case for backwards compatibility: 3384 * If there are two (or more) colons but no '[' and ']', 3385 * assume this is an inet6 address without a service. 3386 */ 3387 if (pe->pe_name != NULL) { 3388 #ifdef INET6 3389 if (pe->pe_name[0] == '[' && 3390 (cp = strchr(pe->pe_name + 1, ']')) != NULL) { 3391 pe->pe_name = &pe->pe_name[1]; 3392 *cp = '\0'; 3393 if (cp[1] == ':' && cp[2] != '\0') 3394 pe->pe_serv = cp + 2; 3395 } else { 3396 #endif 3397 cp = strchr(pe->pe_name, ':'); 3398 if (cp != NULL && strchr(cp + 1, ':') == NULL) { 3399 *cp = '\0'; 3400 if (cp[1] != '\0') 3401 pe->pe_serv = cp + 1; 3402 if (cp == pe->pe_name) 3403 pe->pe_name = NULL; 3404 } 3405 #ifdef INET6 3406 } 3407 #endif 3408 } 3409 hints = (struct addrinfo){ 3410 .ai_family = AF_UNSPEC, 3411 .ai_socktype = SOCK_DGRAM, 3412 .ai_flags = AI_PASSIVE 3413 }; 3414 if (pe->pe_name != NULL) 3415 dprintf("Trying peer: %s\n", pe->pe_name); 3416 if (pe->pe_serv == NULL) 3417 pe->pe_serv = "syslog"; 3418 error = getaddrinfo(pe->pe_name, pe->pe_serv, &hints, &res0); 3419 if (error) { 3420 char *msgbuf; 3421 3422 asprintf(&msgbuf, "getaddrinfo failed for %s%s: %s", 3423 pe->pe_name == NULL ? "" : pe->pe_name, pe->pe_serv, 3424 gai_strerror(error)); 3425 errno = 0; 3426 if (msgbuf == NULL) 3427 logerror(gai_strerror(error)); 3428 else 3429 logerror(msgbuf); 3430 free(msgbuf); 3431 die(0); 3432 } 3433 for (res = res0; res != NULL; res = res->ai_next) { 3434 int s; 3435 3436 if (res->ai_family != AF_LOCAL && 3437 SecureMode > 1) { 3438 /* Only AF_LOCAL in secure mode. */ 3439 continue; 3440 } 3441 if (family != AF_UNSPEC && 3442 res->ai_family != AF_LOCAL && res->ai_family != family) 3443 continue; 3444 3445 s = socket(res->ai_family, res->ai_socktype, 3446 res->ai_protocol); 3447 if (s < 0) { 3448 logerror("socket"); 3449 error++; 3450 continue; 3451 } 3452 #ifdef INET6 3453 if (res->ai_family == AF_INET6) { 3454 if (setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, 3455 &(int){1}, sizeof(int)) < 0) { 3456 logerror("setsockopt(IPV6_V6ONLY)"); 3457 close(s); 3458 error++; 3459 continue; 3460 } 3461 } 3462 #endif 3463 if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, 3464 &(int){1}, sizeof(int)) < 0) { 3465 logerror("setsockopt(SO_REUSEADDR)"); 3466 close(s); 3467 error++; 3468 continue; 3469 } 3470 3471 /* 3472 * Bind INET and UNIX-domain sockets. 3473 * 3474 * A UNIX-domain socket is always bound to a pathname 3475 * regardless of -N flag. 3476 * 3477 * For INET sockets, RFC 3164 recommends that client 3478 * side message should come from the privileged syslogd port. 3479 * 3480 * If the system administrator chooses not to obey 3481 * this, we can skip the bind() step so that the 3482 * system will choose a port for us. 3483 */ 3484 if (res->ai_family == AF_LOCAL) 3485 unlink(pe->pe_name); 3486 if (res->ai_family == AF_LOCAL || 3487 NoBind == 0 || pe->pe_name != NULL) { 3488 if (bind(s, res->ai_addr, res->ai_addrlen) < 0) { 3489 logerror("bind"); 3490 close(s); 3491 error++; 3492 continue; 3493 } 3494 if (res->ai_family == AF_LOCAL || 3495 SecureMode == 0) 3496 increase_rcvbuf(s); 3497 } 3498 if (res->ai_family == AF_LOCAL && 3499 chmod(pe->pe_name, pe->pe_mode) < 0) { 3500 dprintf("chmod %s: %s\n", pe->pe_name, 3501 strerror(errno)); 3502 close(s); 3503 error++; 3504 continue; 3505 } 3506 dprintf("new socket fd is %d\n", s); 3507 if (res->ai_socktype != SOCK_DGRAM) { 3508 listen(s, 5); 3509 } 3510 sl_recv = socklist_recv_sock; 3511 #if defined(INET) || defined(INET6) 3512 if (SecureMode && (res->ai_family == AF_INET || 3513 res->ai_family == AF_INET6)) { 3514 dprintf("shutdown\n"); 3515 /* Forbid communication in secure mode. */ 3516 if (shutdown(s, SHUT_RD) < 0 && 3517 errno != ENOTCONN) { 3518 logerror("shutdown"); 3519 if (!Debug) 3520 die(0); 3521 } 3522 sl_recv = NULL; 3523 } else 3524 #endif 3525 dprintf("listening on socket\n"); 3526 dprintf("sending on socket\n"); 3527 addsock(res->ai_addr, res->ai_addrlen, 3528 &(struct socklist){ 3529 .sl_socket = s, 3530 .sl_peer = pe, 3531 .sl_recv = sl_recv 3532 }); 3533 } 3534 freeaddrinfo(res0); 3535 3536 return(error); 3537 } 3538 3539 static void 3540 increase_rcvbuf(int fd) 3541 { 3542 socklen_t len; 3543 3544 if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &len, 3545 &(socklen_t){sizeof(len)}) == 0) { 3546 if (len < RCVBUF_MINSIZE) { 3547 len = RCVBUF_MINSIZE; 3548 setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &len, sizeof(len)); 3549 } 3550 } 3551 } 3552