2 * Copyright (c) 1983, 1988, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 static const char copyright[] =
32 "@(#) Copyright (c) 1983, 1988, 1993, 1994\n\
33 The Regents of the University of California. All rights reserved.\n";
38 static char sccsid[] = "@(#)syslogd.c 8.3 (Berkeley) 4/4/94";
42 #include <sys/cdefs.h>
43 __FBSDID("$FreeBSD$");
46 * syslogd -- log system messages
48 * This program implements a system log. It takes a series of lines.
49 * Each line may have a priority, signified as "<n>" as
50 * the first characters of the line. If this is
51 * not present, a default priority is used.
53 * To kill syslogd, send a signal 15 (terminate). A signal 1 (hup) will
54 * cause it to reread its configuration file.
58 * MAXLINE -- the maximum line length that can be handled.
59 * DEFUPRI -- the default priority for user messages
60 * DEFSPRI -- the default priority for kernel messages
63 * extensive changes by Ralph Campbell
64 * more extensive changes by Eric Allman (again)
65 * Extension to log by program name as well as facility and priority
67 * -u and -v by Harlan Stenn.
68 * Priority comparison code by Harlan Stenn.
71 #define MAXLINE 1024 /* maximum line length */
72 #define MAXSVLINE 120 /* maximum saved line length */
73 #define DEFUPRI (LOG_USER|LOG_NOTICE)
74 #define DEFSPRI (LOG_KERN|LOG_CRIT)
75 #define TIMERINTVL 30 /* interval for checking flush, mark */
76 #define TTYMSGTIME 1 /* timeout passed to ttymsg */
77 #define RCVBUF_MINSIZE (80 * 1024) /* minimum size of dgram rcv buffer */
79 #include <sys/param.h>
80 #include <sys/ioctl.h>
84 #include <sys/socket.h>
85 #include <sys/queue.h>
89 #include <sys/resource.h>
90 #include <sys/syslimits.h>
91 #include <sys/types.h>
93 #include <netinet/in.h>
95 #include <arpa/inet.h>
108 #include <sysexits.h>
112 #include "pathnames.h"
116 #include <sys/syslog.h>
118 const char *ConfFile = _PATH_LOGCONF;
119 const char *PidFile = _PATH_LOGPID;
120 const char ctty[] = _PATH_CONSOLE;
122 #define dprintf if (Debug) printf
124 #define MAXUNAMES 20 /* maximum number of user names */
127 * List of hosts for binding.
129 static STAILQ_HEAD(, host) hqueue;
132 STAILQ_ENTRY(host) next;
137 * We have two default sockets, one with 666 permissions,
138 * and one for privileged programs.
144 STAILQ_ENTRY(funix) next;
146 struct funix funix_secure = { -1, _PATH_LOG_PRIV, S_IRUSR | S_IWUSR,
148 struct funix funix_default = { -1, _PATH_LOG, DEFFILEMODE,
151 STAILQ_HEAD(, funix) funixes = { &funix_default,
152 &(funix_secure.next.stqe_next) };
158 #define IGN_CONS 0x001 /* don't print on console */
159 #define SYNC_FILE 0x002 /* do fsync on file after printing */
160 #define ADDDATE 0x004 /* add a date to the message */
161 #define MARK 0x008 /* this message is a mark */
162 #define ISKERNEL 0x010 /* kernel generated message */
165 * This structure represents the files that will have log
167 * We require f_file to be valid if f_type is F_FILE, F_CONSOLE, F_TTY
168 * or if f_type if F_PIPE and f_pid > 0.
172 struct filed *f_next; /* next in linked list */
173 short f_type; /* entry type, see below */
174 short f_file; /* file descriptor */
175 time_t f_time; /* time this was last written */
176 char *f_host; /* host from which to recd. */
177 u_char f_pmask[LOG_NFACILITIES+1]; /* priority mask */
178 u_char f_pcmp[LOG_NFACILITIES+1]; /* compare priority */
182 char *f_program; /* program this applies to */
184 char f_uname[MAXUNAMES][MAXLOGNAME];
186 char f_hname[MAXHOSTNAMELEN];
187 struct addrinfo *f_addr;
189 } f_forw; /* forwarding address */
190 char f_fname[MAXPATHLEN];
192 char f_pname[MAXPATHLEN];
196 char f_prevline[MAXSVLINE]; /* last message logged */
197 char f_lasttime[16]; /* time of last occurrence */
198 char f_prevhost[MAXHOSTNAMELEN]; /* host from which recd. */
199 int f_prevpri; /* pri of f_prevline */
200 int f_prevlen; /* length of f_prevline */
201 int f_prevcount; /* repetition cnt of prevline */
202 u_int f_repeatcount; /* number of "repeated" msgs */
203 int f_flags; /* file-specific flags */
204 #define FFLAG_SYNC 0x01
205 #define FFLAG_NEEDSYNC 0x02
209 * Queue of about-to-be dead processes we should watch out for.
212 TAILQ_HEAD(stailhead, deadq_entry) deadq_head;
213 struct stailhead *deadq_headp;
218 TAILQ_ENTRY(deadq_entry) dq_entries;
222 * The timeout to apply to processes waiting on the dead queue. Unit
223 * of measure is `mark intervals', i.e. 20 minutes by default.
224 * Processes on the dead queue will be terminated after that time.
227 #define DQ_TIMO_INIT 2
229 typedef struct deadq_entry *dq_t;
233 * Struct to hold records of network addresses that are allowed to log
241 struct sockaddr_storage addr;
242 struct sockaddr_storage mask;
246 #define a_addr u.numeric.addr
247 #define a_mask u.numeric.mask
248 #define a_name u.name
253 * Intervals at which we flush out "message repeated" messages,
254 * in seconds after previous message is logged. After each flush,
255 * we move to the next interval until we reach the largest.
257 int repeatinterval[] = { 30, 120, 600 }; /* # of secs before flush */
258 #define MAXREPEAT ((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1)
259 #define REPEATTIME(f) ((f)->f_time + repeatinterval[(f)->f_repeatcount])
260 #define BACKOFF(f) { if (++(f)->f_repeatcount > MAXREPEAT) \
261 (f)->f_repeatcount = MAXREPEAT; \
264 /* values for f_type */
265 #define F_UNUSED 0 /* unused entry */
266 #define F_FILE 1 /* regular file */
267 #define F_TTY 2 /* terminal */
268 #define F_CONSOLE 3 /* console terminal */
269 #define F_FORW 4 /* remote machine */
270 #define F_USERS 5 /* list of users */
271 #define F_WALL 6 /* everyone logged on */
272 #define F_PIPE 7 /* pipe to program */
274 const char *TypeNames[8] = {
275 "UNUSED", "FILE", "TTY", "CONSOLE",
276 "FORW", "USERS", "WALL", "PIPE"
279 static struct filed *Files; /* Log files that we write to */
280 static struct filed consfile; /* Console */
282 static int Debug; /* debug flag */
283 static int Foreground = 0; /* Run in foreground, instead of daemonizing */
284 static int resolve = 1; /* resolve hostname */
285 static char LocalHostName[MAXHOSTNAMELEN]; /* our hostname */
286 static const char *LocalDomain; /* our local domain name */
287 static int *finet; /* Internet datagram sockets */
288 static int fklog = -1; /* /dev/klog */
289 static int Initialized; /* set when we have initialized ourselves */
290 static int MarkInterval = 20 * 60; /* interval between marks in seconds */
291 static int MarkSeq; /* mark sequence number */
292 static int NoBind; /* don't bind() as suggested by RFC 3164 */
293 static int SecureMode; /* when true, receive only unix domain socks */
295 static int family = PF_UNSPEC; /* protocol family (IPv4, IPv6 or both) */
297 static int family = PF_INET; /* protocol family (IPv4 only) */
299 static int mask_C1 = 1; /* mask characters from 0x80 - 0x9F */
300 static int send_to_all; /* send message to all IPv4/IPv6 addresses */
301 static int use_bootfile; /* log entire bootfile for every kern msg */
302 static int no_compress; /* don't compress messages (1=pipes, 2=all) */
303 static int logflags = O_WRONLY|O_APPEND; /* flags used to open log files */
305 static char bootfile[MAXLINE+1]; /* booted kernel file */
307 struct allowedpeer *AllowedPeers; /* List of allowed peers */
308 static int NumAllowed; /* Number of entries in AllowedPeers */
309 static int RemoteAddDate; /* Always set the date on remote messages */
311 static int UniquePriority; /* Only log specified priority? */
312 static int LogFacPri; /* Put facility and priority in log message: */
313 /* 0=no, 1=numeric, 2=names */
314 static int KeepKernFac; /* Keep remotely logged kernel facility */
315 static int needdofsync = 0; /* Are any file(s) waiting to be fsynced? */
316 static struct pidfh *pfh;
318 volatile sig_atomic_t MarkSet, WantDie;
320 static int allowaddr(char *);
321 static void cfline(const char *, struct filed *,
322 const char *, const char *);
323 static const char *cvthname(struct sockaddr *);
324 static void deadq_enter(pid_t, const char *);
325 static int deadq_remove(pid_t);
326 static int decode(const char *, const CODE *);
327 static void die(int);
328 static void dodie(int);
329 static void dofsync(void);
330 static void domark(int);
331 static void fprintlog(struct filed *, int, const char *);
332 static int *socksetup(int, char *);
333 static void init(int);
334 static void logerror(const char *);
335 static void logmsg(int, const char *, const char *, int);
336 static void log_deadchild(pid_t, int, const char *);
337 static void markit(void);
338 static int skip_message(const char *, const char *, int);
339 static void printline(const char *, char *, int);
340 static void printsys(char *);
341 static int p_open(const char *, pid_t *);
342 static void readklog(void);
343 static void reapchild(int);
344 static void usage(void);
345 static int validate(struct sockaddr *, const char *);
346 static void unmapped(struct sockaddr *);
347 static void wallmsg(struct filed *, struct iovec *, const int iovlen);
348 static int waitdaemon(int, int, int);
349 static void timedout(int);
350 static void increase_rcvbuf(int);
353 main(int argc, char *argv[])
355 int ch, i, fdsrmax = 0, l;
356 struct sockaddr_un sunx, fromunix;
357 struct sockaddr_storage frominet;
359 char line[MAXLINE + 1];
361 struct timeval tv, *tvp;
362 struct sigaction sact;
364 struct funix *fx, *fx1;
366 pid_t ppid = 1, spid;
369 if (madvise(NULL, 0, MADV_PROTECT) != 0)
370 dprintf("madvise() failed: %s\n", strerror(errno));
372 STAILQ_INIT(&hqueue);
374 while ((ch = getopt(argc, argv, "468Aa:b:cCdf:Fkl:m:nNop:P:sS:Tuv"))
391 case 'a': /* allow specific network addresses only */
392 if (allowaddr(optarg) == -1)
397 if ((host = malloc(sizeof(struct host))) == NULL)
398 err(1, "malloc failed");
400 STAILQ_INSERT_TAIL(&hqueue, host, next);
409 case 'd': /* debug */
412 case 'f': /* configuration file */
415 case 'F': /* run in foreground instead of daemon */
418 case 'k': /* keep remote kern fac */
427 if (optarg[0] == '/') {
430 } else if ((name = strchr(optarg, ':')) != NULL) {
433 errx(1, "socket name must be absolute "
435 if (isdigit(*optarg)) {
436 perml = strtol(optarg, &ep, 8);
437 if (*ep || perml < 0 ||
438 perml & ~(S_IRWXU|S_IRWXG|S_IRWXO))
439 errx(1, "invalid mode %s, exiting",
441 mode = (mode_t )perml;
443 errx(1, "invalid mode %s, exiting",
445 } else /* doesn't begin with '/', and no ':' */
446 errx(1, "can't parse path %s", optarg);
448 if (strlen(name) >= sizeof(sunx.sun_path))
449 errx(1, "%s path too long, exiting", name);
450 if ((fx = malloc(sizeof(struct funix))) == NULL)
451 err(1, "malloc failed");
455 STAILQ_INSERT_TAIL(&funixes, fx, next);
458 case 'm': /* mark interval */
459 MarkInterval = atoi(optarg) * 60;
472 if (strlen(optarg) >= sizeof(sunx.sun_path))
473 errx(1, "%s path too long, exiting", optarg);
474 funix_default.name = optarg;
476 case 'P': /* path for alt. PID */
479 case 's': /* no network mode */
482 case 'S': /* path for privileged originator */
483 if (strlen(optarg) >= sizeof(sunx.sun_path))
484 errx(1, "%s path too long, exiting", optarg);
485 funix_secure.name = optarg;
490 case 'u': /* only log specified priority */
493 case 'v': /* log facility and priority */
499 if ((argc -= optind) != 0)
502 pfh = pidfile_open(PidFile, 0600, &spid);
505 errx(1, "syslogd already running, pid: %d", spid);
506 warn("cannot open pid file");
509 if ((!Foreground) && (!Debug)) {
510 ppid = waitdaemon(0, 0, 30);
512 warn("could not become daemon");
523 consfile.f_type = F_CONSOLE;
524 (void)strlcpy(consfile.f_un.f_fname, ctty + sizeof _PATH_DEV - 1,
525 sizeof(consfile.f_un.f_fname));
526 (void)strlcpy(bootfile, getbootfile(), sizeof(bootfile));
527 (void)signal(SIGTERM, dodie);
528 (void)signal(SIGINT, Debug ? dodie : SIG_IGN);
529 (void)signal(SIGQUIT, Debug ? dodie : SIG_IGN);
531 * We don't want the SIGCHLD and SIGHUP handlers to interfere
532 * with each other; they are likely candidates for being called
533 * simultaneously (SIGHUP closes pipe descriptor, process dies,
537 sigaddset(&mask, SIGHUP);
538 sact.sa_handler = reapchild;
540 sact.sa_flags = SA_RESTART;
541 (void)sigaction(SIGCHLD, &sact, NULL);
542 (void)signal(SIGALRM, domark);
543 (void)signal(SIGPIPE, SIG_IGN); /* We'll catch EPIPE instead. */
544 (void)alarm(TIMERINTVL);
546 TAILQ_INIT(&deadq_head);
549 #define SUN_LEN(unp) (strlen((unp)->sun_path) + 2)
551 STAILQ_FOREACH_SAFE(fx, &funixes, next, fx1) {
552 (void)unlink(fx->name);
553 memset(&sunx, 0, sizeof(sunx));
554 sunx.sun_family = AF_LOCAL;
555 (void)strlcpy(sunx.sun_path, fx->name, sizeof(sunx.sun_path));
556 fx->s = socket(PF_LOCAL, SOCK_DGRAM, 0);
558 bind(fx->s, (struct sockaddr *)&sunx, SUN_LEN(&sunx)) < 0 ||
559 chmod(fx->name, fx->mode) < 0) {
560 (void)snprintf(line, sizeof line,
561 "cannot create %s", fx->name);
563 dprintf("cannot create %s (%d)\n", fx->name, errno);
564 if (fx == &funix_default || fx == &funix_secure)
567 STAILQ_REMOVE(&funixes, fx, funix, next);
571 increase_rcvbuf(fx->s);
573 if (SecureMode <= 1) {
574 if (STAILQ_EMPTY(&hqueue))
575 finet = socksetup(family, NULL);
576 STAILQ_FOREACH(host, &hqueue, next) {
578 finet0 = socksetup(family, host->name);
579 if (finet0 && !finet) {
581 } else if (finet0 && finet) {
582 total = *finet0 + *finet + 1;
583 finet = realloc(finet, total * sizeof(int));
585 err(1, "realloc failed");
586 for (i = 1; i <= *finet0; i++) {
587 finet[(*finet)+i] = finet0[i];
597 for (i = 0; i < *finet; i++) {
598 if (shutdown(finet[i+1], SHUT_RD) < 0 &&
600 logerror("shutdown");
606 dprintf("listening on inet and/or inet6 socket\n");
608 dprintf("sending on inet and/or inet6 socket\n");
611 if ((fklog = open(_PATH_KLOG, O_RDONLY, 0)) >= 0)
612 if (fcntl(fklog, F_SETFL, O_NONBLOCK) < 0)
615 dprintf("can't open %s (%d)\n", _PATH_KLOG, errno);
617 /* tuck my process id away */
620 dprintf("off & running....\n");
623 /* prevent SIGHUP and SIGCHLD handlers from running in parallel */
625 sigaddset(&mask, SIGCHLD);
626 sact.sa_handler = init;
628 sact.sa_flags = SA_RESTART;
629 (void)sigaction(SIGHUP, &sact, NULL);
632 tv.tv_sec = tv.tv_usec = 0;
634 if (fklog != -1 && fklog > fdsrmax)
636 if (finet && !SecureMode) {
637 for (i = 0; i < *finet; i++) {
638 if (finet[i+1] != -1 && finet[i+1] > fdsrmax)
639 fdsrmax = finet[i+1];
642 STAILQ_FOREACH(fx, &funixes, next)
646 fdsr = (fd_set *)calloc(howmany(fdsrmax+1, NFDBITS),
649 errx(1, "calloc fd_set");
657 bzero(fdsr, howmany(fdsrmax+1, NFDBITS) *
662 if (finet && !SecureMode) {
663 for (i = 0; i < *finet; i++) {
664 if (finet[i+1] != -1)
665 FD_SET(finet[i+1], fdsr);
668 STAILQ_FOREACH(fx, &funixes, next)
671 i = select(fdsrmax+1, fdsr, NULL, NULL,
672 needdofsync ? &tv : tvp);
688 if (fklog != -1 && FD_ISSET(fklog, fdsr))
690 if (finet && !SecureMode) {
691 for (i = 0; i < *finet; i++) {
692 if (FD_ISSET(finet[i+1], fdsr)) {
693 len = sizeof(frominet);
694 l = recvfrom(finet[i+1], line, MAXLINE,
695 0, (struct sockaddr *)&frominet,
699 hname = cvthname((struct sockaddr *)&frominet);
700 unmapped((struct sockaddr *)&frominet);
701 if (validate((struct sockaddr *)&frominet, hname))
702 printline(hname, line, RemoteAddDate ? ADDDATE : 0);
703 } else if (l < 0 && errno != EINTR)
704 logerror("recvfrom inet");
708 STAILQ_FOREACH(fx, &funixes, next) {
709 if (FD_ISSET(fx->s, fdsr)) {
710 len = sizeof(fromunix);
711 l = recvfrom(fx->s, line, MAXLINE, 0,
712 (struct sockaddr *)&fromunix, &len);
715 printline(LocalHostName, line, 0);
716 } else if (l < 0 && errno != EINTR)
717 logerror("recvfrom unix");
726 unmapped(struct sockaddr *sa)
728 struct sockaddr_in6 *sin6;
729 struct sockaddr_in sin4;
731 if (sa->sa_family != AF_INET6)
733 if (sa->sa_len != sizeof(struct sockaddr_in6) ||
734 sizeof(sin4) > sa->sa_len)
736 sin6 = (struct sockaddr_in6 *)sa;
737 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
740 memset(&sin4, 0, sizeof(sin4));
741 sin4.sin_family = AF_INET;
742 sin4.sin_len = sizeof(struct sockaddr_in);
743 memcpy(&sin4.sin_addr, &sin6->sin6_addr.s6_addr[12],
744 sizeof(sin4.sin_addr));
745 sin4.sin_port = sin6->sin6_port;
747 memcpy(sa, &sin4, sin4.sin_len);
754 fprintf(stderr, "%s\n%s\n%s\n%s\n",
755 "usage: syslogd [-468ACcdFknosTuv] [-a allowed_peer]",
756 " [-b bind_address] [-f config_file]",
757 " [-l [mode:]path] [-m mark_interval]",
758 " [-P pid_file] [-p log_socket]");
763 * Take a raw input line, decode the message, and print the message
764 * on the appropriate log files.
767 printline(const char *hname, char *msg, int flags)
772 char line[MAXLINE + 1];
774 /* test for special codes */
779 n = strtol(p + 1, &q, 10);
780 if (*q == '>' && n >= 0 && n < INT_MAX && errno == 0) {
785 if (pri &~ (LOG_FACMASK|LOG_PRIMASK))
789 * Don't allow users to log kernel messages.
790 * NOTE: since LOG_KERN == 0 this will also match
791 * messages with no facility specified.
793 if ((pri & LOG_FACMASK) == LOG_KERN && !KeepKernFac)
794 pri = LOG_MAKEPRI(LOG_USER, LOG_PRI(pri));
798 while ((c = (unsigned char)*p++) != '\0' &&
799 q < &line[sizeof(line) - 4]) {
800 if (mask_C1 && (c & 0x80) && c < 0xA0) {
805 if (isascii(c) && iscntrl(c)) {
808 } else if (c == '\t') {
820 logmsg(pri, line, hname, flags);
824 * Read /dev/klog while data are available, split into lines.
829 char *p, *q, line[MAXLINE + 1];
834 i = read(fklog, line + len, MAXLINE - 1 - len);
836 line[i + len] = '\0';
838 if (i < 0 && errno != EINTR && errno != EAGAIN) {
845 for (p = line; (q = strchr(p, '\n')) != NULL; p = q + 1) {
850 if (len >= MAXLINE - 1) {
855 memmove(line, p, len + 1);
862 * Take a raw input line from /dev/klog, format similar to syslog().
869 int flags, isprintf, pri;
871 flags = ISKERNEL | SYNC_FILE | ADDDATE; /* fsync after write */
877 n = strtol(p + 1, &q, 10);
878 if (*q == '>' && n >= 0 && n < INT_MAX && errno == 0) {
885 * Kernel printf's and LOG_CONSOLE messages have been displayed
886 * on the console already.
888 if (isprintf || (pri & LOG_FACMASK) == LOG_CONSOLE)
890 if (pri &~ (LOG_FACMASK|LOG_PRIMASK))
892 logmsg(pri, p, LocalHostName, flags);
898 * Match a program or host name against a specification.
899 * Return a non-0 value if the message must be ignored
900 * based on the specification.
903 skip_message(const char *name, const char *spec, int checkcase)
908 /* Behaviour on explicit match */
923 s = strstr (spec, name);
925 s = strcasestr (spec, name);
928 prev = (s == spec ? ',' : *(s - 1));
929 next = *(s + strlen (name));
931 if (prev == ',' && (next == '\0' || next == ','))
932 /* Explicit match: skip iff the spec is an
937 /* No explicit match for this name: skip the message iff
938 the spec is an inclusive one. */
943 * Log a message to the appropriate log files, users, etc. based on
947 logmsg(int pri, const char *msg, const char *from, int flags)
950 int i, fac, msglen, omask, prilev;
951 const char *timestamp;
952 char prog[NAME_MAX+1];
955 dprintf("logmsg: pri %o, flags %x, from %s, msg %s\n",
956 pri, flags, from, msg);
958 omask = sigblock(sigmask(SIGHUP)|sigmask(SIGALRM));
961 * Check to see if msg looks non-standard.
963 msglen = strlen(msg);
964 if (msglen < 16 || msg[3] != ' ' || msg[6] != ' ' ||
965 msg[9] != ':' || msg[12] != ':' || msg[15] != ' ')
969 if (flags & ADDDATE) {
970 timestamp = ctime(&now) + 4;
977 /* skip leading blanks */
978 while (isspace(*msg)) {
983 /* extract facility and priority level */
985 fac = LOG_NFACILITIES;
989 /* Check maximum facility number. */
990 if (fac > LOG_NFACILITIES) {
991 (void)sigsetmask(omask);
995 prilev = LOG_PRI(pri);
997 /* extract program name */
998 for (i = 0; i < NAME_MAX; i++) {
999 if (!isprint(msg[i]) || msg[i] == ':' || msg[i] == '[' ||
1000 msg[i] == '/' || isspace(msg[i]))
1006 /* add kernel prefix for kernel messages */
1007 if (flags & ISKERNEL) {
1008 snprintf(buf, sizeof(buf), "%s: %s",
1009 use_bootfile ? bootfile : "kernel", msg);
1011 msglen = strlen(buf);
1014 /* log the message to the particular outputs */
1018 * Open in non-blocking mode to avoid hangs during open
1019 * and close(waiting for the port to drain).
1021 f->f_file = open(ctty, O_WRONLY | O_NONBLOCK, 0);
1023 if (f->f_file >= 0) {
1024 (void)strlcpy(f->f_lasttime, timestamp,
1025 sizeof(f->f_lasttime));
1026 fprintlog(f, flags, msg);
1027 (void)close(f->f_file);
1029 (void)sigsetmask(omask);
1032 for (f = Files; f; f = f->f_next) {
1033 /* skip messages that are incorrect priority */
1034 if (!(((f->f_pcmp[fac] & PRI_EQ) && (f->f_pmask[fac] == prilev))
1035 ||((f->f_pcmp[fac] & PRI_LT) && (f->f_pmask[fac] < prilev))
1036 ||((f->f_pcmp[fac] & PRI_GT) && (f->f_pmask[fac] > prilev))
1038 || f->f_pmask[fac] == INTERNAL_NOPRI)
1041 /* skip messages with the incorrect hostname */
1042 if (skip_message(from, f->f_host, 0))
1045 /* skip messages with the incorrect program name */
1046 if (skip_message(prog, f->f_program, 1))
1049 /* skip message to console if it has already been printed */
1050 if (f->f_type == F_CONSOLE && (flags & IGN_CONS))
1053 /* don't output marks to recently written files */
1054 if ((flags & MARK) && (now - f->f_time) < MarkInterval / 2)
1058 * suppress duplicate lines to this file
1060 if (no_compress - (f->f_type != F_PIPE) < 1 &&
1061 (flags & MARK) == 0 && msglen == f->f_prevlen &&
1062 !strcmp(msg, f->f_prevline) &&
1063 !strcasecmp(from, f->f_prevhost)) {
1064 (void)strlcpy(f->f_lasttime, timestamp,
1065 sizeof(f->f_lasttime));
1067 dprintf("msg repeated %d times, %ld sec of %d\n",
1068 f->f_prevcount, (long)(now - f->f_time),
1069 repeatinterval[f->f_repeatcount]);
1071 * If domark would have logged this by now,
1072 * flush it now (so we don't hold isolated messages),
1073 * but back off so we'll flush less often
1076 if (now > REPEATTIME(f)) {
1077 fprintlog(f, flags, (char *)NULL);
1081 /* new line, save it */
1083 fprintlog(f, 0, (char *)NULL);
1084 f->f_repeatcount = 0;
1086 (void)strlcpy(f->f_lasttime, timestamp,
1087 sizeof(f->f_lasttime));
1088 (void)strlcpy(f->f_prevhost, from,
1089 sizeof(f->f_prevhost));
1090 if (msglen < MAXSVLINE) {
1091 f->f_prevlen = msglen;
1092 (void)strlcpy(f->f_prevline, msg, sizeof(f->f_prevline));
1093 fprintlog(f, flags, (char *)NULL);
1095 f->f_prevline[0] = 0;
1097 fprintlog(f, flags, msg);
1101 (void)sigsetmask(omask);
1109 for (f = Files; f; f = f->f_next) {
1110 if ((f->f_type == F_FILE) &&
1111 (f->f_flags & FFLAG_NEEDSYNC)) {
1112 f->f_flags &= ~FFLAG_NEEDSYNC;
1113 (void)fsync(f->f_file);
1120 fprintlog(struct filed *f, int flags, const char *msg)
1122 struct iovec iov[IOV_SIZE];
1125 int i, l, lsent = 0;
1126 char line[MAXLINE + 1], repbuf[80], greetings[200], *wmsg = NULL;
1127 char nul[] = "", space[] = " ", lf[] = "\n", crlf[] = "\r\n";
1131 if (f->f_type == F_WALL) {
1132 v->iov_base = greetings;
1133 /* The time displayed is not synchornized with the other log
1134 * destinations (like messages). Following fragment was using
1135 * ctime(&now), which was updating the time every 30 sec.
1136 * With f_lasttime, time is synchronized correctly.
1138 v->iov_len = snprintf(greetings, sizeof greetings,
1139 "\r\n\7Message from syslogd@%s at %.24s ...\r\n",
1140 f->f_prevhost, f->f_lasttime);
1141 if (v->iov_len >= sizeof greetings)
1142 v->iov_len = sizeof greetings - 1;
1148 v->iov_base = f->f_lasttime;
1149 v->iov_len = strlen(f->f_lasttime);
1151 v->iov_base = space;
1157 static char fp_buf[30]; /* Hollow laugh */
1158 int fac = f->f_prevpri & LOG_FACMASK;
1159 int pri = LOG_PRI(f->f_prevpri);
1160 const char *f_s = NULL;
1161 char f_n[5]; /* Hollow laugh */
1162 const char *p_s = NULL;
1163 char p_n[5]; /* Hollow laugh */
1165 if (LogFacPri > 1) {
1168 for (c = facilitynames; c->c_name; c++) {
1169 if (c->c_val == fac) {
1174 for (c = prioritynames; c->c_name; c++) {
1175 if (c->c_val == pri) {
1182 snprintf(f_n, sizeof f_n, "%d", LOG_FAC(fac));
1186 snprintf(p_n, sizeof p_n, "%d", pri);
1189 snprintf(fp_buf, sizeof fp_buf, "<%s.%s> ", f_s, p_s);
1190 v->iov_base = fp_buf;
1191 v->iov_len = strlen(fp_buf);
1198 v->iov_base = f->f_prevhost;
1199 v->iov_len = strlen(v->iov_base);
1201 v->iov_base = space;
1206 wmsg = strdup(msg); /* XXX iov_base needs a `const' sibling. */
1212 v->iov_len = strlen(msg);
1213 } else if (f->f_prevcount > 1) {
1214 v->iov_base = repbuf;
1215 v->iov_len = snprintf(repbuf, sizeof repbuf,
1216 "last message repeated %d times", f->f_prevcount);
1218 v->iov_base = f->f_prevline;
1219 v->iov_len = f->f_prevlen;
1223 dprintf("Logging to %s", TypeNames[f->f_type]);
1226 switch (f->f_type) {
1233 port = (int)ntohs(((struct sockaddr_in *)
1234 (f->f_un.f_forw.f_addr->ai_addr))->sin_port);
1236 dprintf(" %s:%d\n", f->f_un.f_forw.f_hname, port);
1238 dprintf(" %s\n", f->f_un.f_forw.f_hname);
1240 /* check for local vs remote messages */
1241 if (strcasecmp(f->f_prevhost, LocalHostName))
1242 l = snprintf(line, sizeof line - 1,
1243 "<%d>%.15s Forwarded from %s: %s",
1244 f->f_prevpri, (char *)iov[0].iov_base,
1245 f->f_prevhost, (char *)iov[5].iov_base);
1247 l = snprintf(line, sizeof line - 1, "<%d>%.15s %s",
1248 f->f_prevpri, (char *)iov[0].iov_base,
1249 (char *)iov[5].iov_base);
1252 else if (l > MAXLINE)
1256 for (r = f->f_un.f_forw.f_addr; r; r = r->ai_next) {
1257 for (i = 0; i < *finet; i++) {
1260 * should we check AF first, or just
1261 * trial and error? FWD
1264 address_family_of(finet[i+1]))
1266 lsent = sendto(finet[i+1], line, l, 0,
1267 r->ai_addr, r->ai_addrlen);
1271 if (lsent == l && !send_to_all)
1274 dprintf("lsent/l: %d/%d\n", lsent, l);
1289 /* case ENOTSOCK: */
1291 /* case EMSGSIZE: */
1294 /* case ECONNREFUSED: */
1296 dprintf("removing entry: errno=%d\n", e);
1297 f->f_type = F_UNUSED;
1305 dprintf(" %s\n", f->f_un.f_fname);
1308 if (writev(f->f_file, iov, IOV_SIZE) < 0) {
1310 * If writev(2) fails for potentially transient errors
1311 * like the filesystem being full, ignore it.
1312 * Otherwise remove this logfile from the list.
1314 if (errno != ENOSPC) {
1316 (void)close(f->f_file);
1317 f->f_type = F_UNUSED;
1319 logerror(f->f_un.f_fname);
1321 } else if ((flags & SYNC_FILE) && (f->f_flags & FFLAG_SYNC)) {
1322 f->f_flags |= FFLAG_NEEDSYNC;
1328 dprintf(" %s\n", f->f_un.f_pipe.f_pname);
1331 if (f->f_un.f_pipe.f_pid == 0) {
1332 if ((f->f_file = p_open(f->f_un.f_pipe.f_pname,
1333 &f->f_un.f_pipe.f_pid)) < 0) {
1334 f->f_type = F_UNUSED;
1335 logerror(f->f_un.f_pipe.f_pname);
1339 if (writev(f->f_file, iov, IOV_SIZE) < 0) {
1341 (void)close(f->f_file);
1342 if (f->f_un.f_pipe.f_pid > 0)
1343 deadq_enter(f->f_un.f_pipe.f_pid,
1344 f->f_un.f_pipe.f_pname);
1345 f->f_un.f_pipe.f_pid = 0;
1347 logerror(f->f_un.f_pipe.f_pname);
1352 if (flags & IGN_CONS) {
1353 dprintf(" (ignored)\n");
1359 dprintf(" %s%s\n", _PATH_DEV, f->f_un.f_fname);
1363 errno = 0; /* ttymsg() only sometimes returns an errno */
1364 if ((msgret = ttymsg(iov, IOV_SIZE, f->f_un.f_fname, 10))) {
1365 f->f_type = F_UNUSED;
1375 wallmsg(f, iov, IOV_SIZE);
1383 * WALLMSG -- Write a message to the world at large
1385 * Write the specified message to either the entire
1386 * world, or a list of approved users.
1389 wallmsg(struct filed *f, struct iovec *iov, const int iovlen)
1391 static int reenter; /* avoid calling ourselves */
1400 while ((ut = getutxent()) != NULL) {
1401 if (ut->ut_type != USER_PROCESS)
1403 if (f->f_type == F_WALL) {
1404 if ((p = ttymsg(iov, iovlen, ut->ut_line,
1405 TTYMSGTIME)) != NULL) {
1406 errno = 0; /* already in msg */
1411 /* should we send the message to this user? */
1412 for (i = 0; i < MAXUNAMES; i++) {
1413 if (!f->f_un.f_uname[i][0])
1415 if (!strcmp(f->f_un.f_uname[i], ut->ut_user)) {
1416 if ((p = ttymsg(iov, iovlen, ut->ut_line,
1417 TTYMSGTIME)) != NULL) {
1418 errno = 0; /* already in msg */
1430 reapchild(int signo __unused)
1436 while ((pid = wait3(&status, WNOHANG, (struct rusage *)NULL)) > 0) {
1438 /* Don't tell while we are initting. */
1441 /* First, look if it's a process from the dead queue. */
1442 if (deadq_remove(pid))
1445 /* Now, look in list of active processes. */
1446 for (f = Files; f; f = f->f_next)
1447 if (f->f_type == F_PIPE &&
1448 f->f_un.f_pipe.f_pid == pid) {
1449 (void)close(f->f_file);
1450 f->f_un.f_pipe.f_pid = 0;
1451 log_deadchild(pid, status,
1452 f->f_un.f_pipe.f_pname);
1461 * Return a printable representation of a host address.
1464 cvthname(struct sockaddr *f)
1467 sigset_t omask, nmask;
1468 static char hname[NI_MAXHOST], ip[NI_MAXHOST];
1470 error = getnameinfo((struct sockaddr *)f,
1471 ((struct sockaddr *)f)->sa_len,
1472 ip, sizeof ip, NULL, 0, NI_NUMERICHOST);
1473 dprintf("cvthname(%s)\n", ip);
1476 dprintf("Malformed from address %s\n", gai_strerror(error));
1482 sigemptyset(&nmask);
1483 sigaddset(&nmask, SIGHUP);
1484 sigprocmask(SIG_BLOCK, &nmask, &omask);
1485 error = getnameinfo((struct sockaddr *)f,
1486 ((struct sockaddr *)f)->sa_len,
1487 hname, sizeof hname, NULL, 0, NI_NAMEREQD);
1488 sigprocmask(SIG_SETMASK, &omask, NULL);
1490 dprintf("Host name for your address (%s) unknown\n", ip);
1494 if (hl > 0 && hname[hl-1] == '.')
1496 trimdomain(hname, hl);
1508 domark(int signo __unused)
1515 * Print syslogd errors some place.
1518 logerror(const char *type)
1521 static int recursed = 0;
1523 /* If there's an error while trying to log an error, give up. */
1529 sizeof buf, "syslogd: %s: %s", type, strerror(errno));
1531 (void)snprintf(buf, sizeof buf, "syslogd: %s", type);
1533 dprintf("%s\n", buf);
1534 logmsg(LOG_SYSLOG|LOG_ERR, buf, LocalHostName, ADDDATE);
1543 int was_initialized;
1546 was_initialized = Initialized;
1547 Initialized = 0; /* Don't log SIGCHLDs. */
1548 for (f = Files; f != NULL; f = f->f_next) {
1549 /* flush any pending output */
1551 fprintlog(f, 0, (char *)NULL);
1552 if (f->f_type == F_PIPE && f->f_un.f_pipe.f_pid > 0) {
1553 (void)close(f->f_file);
1554 f->f_un.f_pipe.f_pid = 0;
1557 Initialized = was_initialized;
1559 dprintf("syslogd: exiting on signal %d\n", signo);
1560 (void)snprintf(buf, sizeof(buf), "exiting on signal %d", signo);
1564 STAILQ_FOREACH(fx, &funixes, next)
1565 (void)unlink(fx->name);
1566 pidfile_remove(pfh);
1572 * INIT -- Initialize syslogd from configuration table
1579 struct filed *f, *next, **nextp;
1581 char cline[LINE_MAX];
1582 char prog[LINE_MAX];
1583 char host[MAXHOSTNAMELEN];
1584 char oldLocalHostName[MAXHOSTNAMELEN];
1585 char hostMsg[2*MAXHOSTNAMELEN+40];
1586 char bootfileMsg[LINE_MAX];
1591 * Load hostname (may have changed).
1594 (void)strlcpy(oldLocalHostName, LocalHostName,
1595 sizeof(oldLocalHostName));
1596 if (gethostname(LocalHostName, sizeof(LocalHostName)))
1597 err(EX_OSERR, "gethostname() failed");
1598 if ((p = strchr(LocalHostName, '.')) != NULL) {
1606 * Load / reload timezone data (in case it changed).
1608 * Just calling tzset() again does not work, the timezone code
1609 * caches the result. However, by setting the TZ variable, one
1610 * can defeat the caching and have the timezone code really
1611 * reload the timezone data. Respect any initial setting of
1612 * TZ, in case the system is configured specially.
1614 dprintf("loading timezone data via tzset()\n");
1618 setenv("TZ", ":/etc/localtime", 1);
1624 * Close all open log files.
1627 for (f = Files; f != NULL; f = next) {
1628 /* flush any pending output */
1630 fprintlog(f, 0, (char *)NULL);
1632 switch (f->f_type) {
1637 (void)close(f->f_file);
1640 if (f->f_un.f_pipe.f_pid > 0) {
1641 (void)close(f->f_file);
1642 deadq_enter(f->f_un.f_pipe.f_pid,
1643 f->f_un.f_pipe.f_pname);
1645 f->f_un.f_pipe.f_pid = 0;
1649 if (f->f_program) free(f->f_program);
1650 if (f->f_host) free(f->f_host);
1656 /* open the configuration file */
1657 if ((cf = fopen(ConfFile, "r")) == NULL) {
1658 dprintf("cannot open %s\n", ConfFile);
1659 *nextp = (struct filed *)calloc(1, sizeof(*f));
1660 if (*nextp == NULL) {
1664 cfline("*.ERR\t/dev/console", *nextp, "*", "*");
1665 (*nextp)->f_next = (struct filed *)calloc(1, sizeof(*f));
1666 if ((*nextp)->f_next == NULL) {
1670 cfline("*.PANIC\t*", (*nextp)->f_next, "*", "*");
1676 * Foreach line in the conf table, open that file.
1679 (void)strlcpy(host, "*", sizeof(host));
1680 (void)strlcpy(prog, "*", sizeof(prog));
1681 while (fgets(cline, sizeof(cline), cf) != NULL) {
1683 * check for end-of-section, comments, strip off trailing
1684 * spaces and newline character. #!prog is treated specially:
1685 * following lines apply only to that program.
1687 for (p = cline; isspace(*p); ++p)
1693 if (*p != '!' && *p != '+' && *p != '-')
1696 if (*p == '+' || *p == '-') {
1700 if ((!*p) || (*p == '*')) {
1701 (void)strlcpy(host, "*", sizeof(host));
1706 for (i = 1; i < MAXHOSTNAMELEN - 1; i++) {
1707 if (!isalnum(*p) && *p != '.' && *p != '-'
1708 && *p != ',' && *p != ':' && *p != '%')
1717 while (isspace(*p)) p++;
1718 if ((!*p) || (*p == '*')) {
1719 (void)strlcpy(prog, "*", sizeof(prog));
1722 for (i = 0; i < LINE_MAX - 1; i++) {
1723 if (!isprint(p[i]) || isspace(p[i]))
1730 for (p = cline + 1; *p != '\0'; p++) {
1733 if (*(p - 1) == '\\') {
1741 for (i = strlen(cline) - 1; i >= 0 && isspace(cline[i]); i--)
1743 f = (struct filed *)calloc(1, sizeof(*f));
1750 cfline(cline, f, prog, host);
1753 /* close the configuration file */
1760 for (f = Files; f; f = f->f_next) {
1761 for (i = 0; i <= LOG_NFACILITIES; i++)
1762 if (f->f_pmask[i] == INTERNAL_NOPRI)
1765 printf("%d ", f->f_pmask[i]);
1766 printf("%s: ", TypeNames[f->f_type]);
1767 switch (f->f_type) {
1769 printf("%s", f->f_un.f_fname);
1774 printf("%s%s", _PATH_DEV, f->f_un.f_fname);
1778 port = (int)ntohs(((struct sockaddr_in *)
1779 (f->f_un.f_forw.f_addr->ai_addr))->sin_port);
1782 f->f_un.f_forw.f_hname, port);
1784 printf("%s", f->f_un.f_forw.f_hname);
1789 printf("%s", f->f_un.f_pipe.f_pname);
1793 for (i = 0; i < MAXUNAMES && *f->f_un.f_uname[i]; i++)
1794 printf("%s, ", f->f_un.f_uname[i]);
1798 printf(" (%s)", f->f_program);
1803 logmsg(LOG_SYSLOG|LOG_INFO, "syslogd: restart", LocalHostName, ADDDATE);
1804 dprintf("syslogd: restarted\n");
1806 * Log a change in hostname, but only on a restart.
1808 if (signo != 0 && strcmp(oldLocalHostName, LocalHostName) != 0) {
1809 (void)snprintf(hostMsg, sizeof(hostMsg),
1810 "syslogd: hostname changed, \"%s\" to \"%s\"",
1811 oldLocalHostName, LocalHostName);
1812 logmsg(LOG_SYSLOG|LOG_INFO, hostMsg, LocalHostName, ADDDATE);
1813 dprintf("%s\n", hostMsg);
1816 * Log the kernel boot file if we aren't going to use it as
1817 * the prefix, and if this is *not* a restart.
1819 if (signo == 0 && !use_bootfile) {
1820 (void)snprintf(bootfileMsg, sizeof(bootfileMsg),
1821 "syslogd: kernel boot file is %s", bootfile);
1822 logmsg(LOG_KERN|LOG_INFO, bootfileMsg, LocalHostName, ADDDATE);
1823 dprintf("%s\n", bootfileMsg);
1828 * Crack a configuration file line
1831 cfline(const char *line, struct filed *f, const char *prog, const char *host)
1833 struct addrinfo hints, *res;
1834 int error, i, pri, syncfile;
1837 char buf[MAXLINE], ebuf[100];
1839 dprintf("cfline(\"%s\", f, \"%s\", \"%s\")\n", line, prog, host);
1841 errno = 0; /* keep strerror() stuff out of logerror messages */
1843 /* clear out file entry */
1844 memset(f, 0, sizeof(*f));
1845 for (i = 0; i <= LOG_NFACILITIES; i++)
1846 f->f_pmask[i] = INTERNAL_NOPRI;
1848 /* save hostname if any */
1849 if (host && *host == '*')
1854 f->f_host = strdup(host);
1855 if (f->f_host == NULL) {
1859 hl = strlen(f->f_host);
1860 if (hl > 0 && f->f_host[hl-1] == '.')
1861 f->f_host[--hl] = '\0';
1862 trimdomain(f->f_host, hl);
1865 /* save program name if any */
1866 if (prog && *prog == '*')
1869 f->f_program = strdup(prog);
1870 if (f->f_program == NULL) {
1876 /* scan through the list of selectors */
1877 for (p = line; *p && *p != '\t' && *p != ' ';) {
1882 /* find the end of this facility name list */
1883 for (q = p; *q && *q != '\t' && *q != ' ' && *q++ != '.'; )
1886 /* get the priority comparison */
1914 /* collect priority name */
1915 for (bp = buf; *q && !strchr("\t,; ", *q); )
1920 while (strchr(",;", *q))
1923 /* decode priority name */
1926 pri_cmp = PRI_LT | PRI_EQ | PRI_GT;
1928 /* Ignore trailing spaces. */
1929 for (i = strlen(buf) - 1; i >= 0 && buf[i] == ' '; i--)
1932 pri = decode(buf, prioritynames);
1935 (void)snprintf(ebuf, sizeof ebuf,
1936 "unknown priority name \"%s\"", buf);
1942 pri_cmp = (UniquePriority)
1947 pri_cmp ^= PRI_LT | PRI_EQ | PRI_GT;
1949 /* scan facilities */
1950 while (*p && !strchr("\t.; ", *p)) {
1951 for (bp = buf; *p && !strchr("\t,;. ", *p); )
1956 for (i = 0; i < LOG_NFACILITIES; i++) {
1957 f->f_pmask[i] = pri;
1958 f->f_pcmp[i] = pri_cmp;
1961 i = decode(buf, facilitynames);
1964 (void)snprintf(ebuf, sizeof ebuf,
1965 "unknown facility name \"%s\"",
1970 f->f_pmask[i >> 3] = pri;
1971 f->f_pcmp[i >> 3] = pri_cmp;
1973 while (*p == ',' || *p == ' ')
1980 /* skip to action part */
1981 while (*p == '\t' || *p == ' ')
1996 * scan forward to see if there is a port defined.
1997 * so we can't use strlcpy..
1999 i = sizeof(f->f_un.f_forw.f_hname);
2000 tp = f->f_un.f_forw.f_hname;
2004 * an ipv6 address should start with a '[' in that case
2005 * we should scan for a ']'
2011 while (*p && (*p != endkey) && (i-- > 0)) {
2014 if (endkey == ']' && *p == endkey)
2018 /* See if we copied a domain and have a port */
2024 memset(&hints, 0, sizeof(hints));
2025 hints.ai_family = family;
2026 hints.ai_socktype = SOCK_DGRAM;
2027 error = getaddrinfo(f->f_un.f_forw.f_hname,
2028 p ? p : "syslog", &hints, &res);
2030 logerror(gai_strerror(error));
2033 f->f_un.f_forw.f_addr = res;
2038 if ((f->f_file = open(p, logflags, 0600)) < 0) {
2039 f->f_type = F_UNUSED;
2044 f->f_flags |= FFLAG_SYNC;
2045 if (isatty(f->f_file)) {
2046 if (strcmp(p, ctty) == 0)
2047 f->f_type = F_CONSOLE;
2050 (void)strlcpy(f->f_un.f_fname, p + sizeof(_PATH_DEV) - 1,
2051 sizeof(f->f_un.f_fname));
2053 (void)strlcpy(f->f_un.f_fname, p, sizeof(f->f_un.f_fname));
2059 f->f_un.f_pipe.f_pid = 0;
2060 (void)strlcpy(f->f_un.f_pipe.f_pname, p + 1,
2061 sizeof(f->f_un.f_pipe.f_pname));
2070 for (i = 0; i < MAXUNAMES && *p; i++) {
2071 for (q = p; *q && *q != ','; )
2073 (void)strncpy(f->f_un.f_uname[i], p, MAXLOGNAME - 1);
2074 if ((q - p) >= MAXLOGNAME)
2075 f->f_un.f_uname[i][MAXLOGNAME - 1] = '\0';
2077 f->f_un.f_uname[i][q - p] = '\0';
2078 while (*q == ',' || *q == ' ')
2082 f->f_type = F_USERS;
2089 * Decode a symbolic name to a numeric value
2092 decode(const char *name, const CODE *codetab)
2098 return (atoi(name));
2100 for (p = buf; *name && p < &buf[sizeof(buf) - 1]; p++, name++) {
2102 *p = tolower(*name);
2107 for (c = codetab; c->c_name; c++)
2108 if (!strcmp(buf, c->c_name))
2120 now = time((time_t *)NULL);
2121 MarkSeq += TIMERINTVL;
2122 if (MarkSeq >= MarkInterval) {
2123 logmsg(LOG_INFO, "-- MARK --",
2124 LocalHostName, ADDDATE|MARK);
2128 for (f = Files; f; f = f->f_next) {
2129 if (f->f_prevcount && now >= REPEATTIME(f)) {
2130 dprintf("flush %s: repeated %d times, %d sec.\n",
2131 TypeNames[f->f_type], f->f_prevcount,
2132 repeatinterval[f->f_repeatcount]);
2133 fprintlog(f, 0, (char *)NULL);
2138 /* Walk the dead queue, and see if we should signal somebody. */
2139 for (q = TAILQ_FIRST(&deadq_head); q != NULL; q = next) {
2140 next = TAILQ_NEXT(q, dq_entries);
2142 switch (q->dq_timeout) {
2144 /* Already signalled once, try harder now. */
2145 if (kill(q->dq_pid, SIGKILL) != 0)
2146 (void)deadq_remove(q->dq_pid);
2151 * Timed out on dead queue, send terminate
2152 * signal. Note that we leave the removal
2153 * from the dead queue to reapchild(), which
2154 * will also log the event (unless the process
2155 * didn't even really exist, in case we simply
2156 * drop it from the dead queue).
2158 if (kill(q->dq_pid, SIGTERM) != 0)
2159 (void)deadq_remove(q->dq_pid);
2167 (void)alarm(TIMERINTVL);
2171 * fork off and become a daemon, but wait for the child to come online
2172 * before returing to the parent, or we get disk thrashing at boot etc.
2173 * Set a timer so we don't hang forever if it wedges.
2176 waitdaemon(int nochdir, int noclose, int maxwait)
2180 pid_t pid, childpid;
2182 switch (childpid = fork()) {
2188 signal(SIGALRM, timedout);
2190 while ((pid = wait3(&status, 0, NULL)) != -1) {
2191 if (WIFEXITED(status))
2192 errx(1, "child pid %d exited with return code %d",
2193 pid, WEXITSTATUS(status));
2194 if (WIFSIGNALED(status))
2195 errx(1, "child pid %d exited on signal %d%s",
2196 pid, WTERMSIG(status),
2197 WCOREDUMP(status) ? " (core dumped)" :
2199 if (pid == childpid) /* it's gone... */
2211 if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
2212 (void)dup2(fd, STDIN_FILENO);
2213 (void)dup2(fd, STDOUT_FILENO);
2214 (void)dup2(fd, STDERR_FILENO);
2222 * We get a SIGALRM from the child when it's running and finished doing it's
2223 * fsync()'s or O_SYNC writes for all the boot messages.
2225 * We also get a signal from the kernel if the timer expires, so check to
2226 * see what happened.
2229 timedout(int sig __unused)
2233 signal(SIGALRM, SIG_DFL);
2235 errx(1, "timed out waiting for child");
2241 * Add `s' to the list of allowable peer addresses to accept messages
2244 * `s' is a string in the form:
2246 * [*]domainname[:{servicename|portnumber|*}]
2250 * netaddr/maskbits[:{servicename|portnumber|*}]
2252 * Returns -1 on error, 0 if the argument was valid.
2258 struct allowedpeer ap;
2261 struct addrinfo hints, *res;
2262 struct in_addr *addrp, *maskp;
2265 u_int32_t *addr6p, *mask6p;
2267 char ip[NI_MAXHOST];
2270 if (*s != '[' || (cp1 = strchr(s + 1, ']')) == NULL)
2273 if ((cp1 = strrchr(cp1, ':'))) {
2274 /* service/port provided */
2276 if (strlen(cp1) == 1 && *cp1 == '*')
2277 /* any port allowed */
2279 else if ((se = getservbyname(cp1, "udp"))) {
2280 ap.port = ntohs(se->s_port);
2282 ap.port = strtol(cp1, &cp2, 0);
2284 return (-1); /* port not numeric */
2287 if ((se = getservbyname("syslog", "udp")))
2288 ap.port = ntohs(se->s_port);
2290 /* sanity, should not happen */
2294 if ((cp1 = strchr(s, '/')) != NULL &&
2295 strspn(cp1 + 1, "0123456789") == strlen(cp1 + 1)) {
2297 if ((masklen = atoi(cp1 + 1)) < 0)
2302 cp2 = s + strlen(s) - 1;
2313 memset(&hints, 0, sizeof(hints));
2314 hints.ai_family = PF_UNSPEC;
2315 hints.ai_socktype = SOCK_DGRAM;
2316 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
2317 if (getaddrinfo(s, NULL, &hints, &res) == 0) {
2319 memcpy(&ap.a_addr, res->ai_addr, res->ai_addrlen);
2320 memset(&ap.a_mask, 0, sizeof(ap.a_mask));
2321 ap.a_mask.ss_family = res->ai_family;
2322 if (res->ai_family == AF_INET) {
2323 ap.a_mask.ss_len = sizeof(struct sockaddr_in);
2324 maskp = &((struct sockaddr_in *)&ap.a_mask)->sin_addr;
2325 addrp = &((struct sockaddr_in *)&ap.a_addr)->sin_addr;
2327 /* use default netmask */
2328 if (IN_CLASSA(ntohl(addrp->s_addr)))
2329 maskp->s_addr = htonl(IN_CLASSA_NET);
2330 else if (IN_CLASSB(ntohl(addrp->s_addr)))
2331 maskp->s_addr = htonl(IN_CLASSB_NET);
2333 maskp->s_addr = htonl(IN_CLASSC_NET);
2334 } else if (masklen <= 32) {
2335 /* convert masklen to netmask */
2339 maskp->s_addr = htonl(~((1 << (32 - masklen)) - 1));
2344 /* Lose any host bits in the network number. */
2345 addrp->s_addr &= maskp->s_addr;
2348 else if (res->ai_family == AF_INET6 && masklen <= 128) {
2349 ap.a_mask.ss_len = sizeof(struct sockaddr_in6);
2352 mask6p = (u_int32_t *)&((struct sockaddr_in6 *)&ap.a_mask)->sin6_addr;
2353 /* convert masklen to netmask */
2354 while (masklen > 0) {
2356 *mask6p = htonl(~(0xffffffff >> masklen));
2359 *mask6p++ = 0xffffffff;
2362 /* Lose any host bits in the network number. */
2363 mask6p = (u_int32_t *)&((struct sockaddr_in6 *)&ap.a_mask)->sin6_addr;
2364 addr6p = (u_int32_t *)&((struct sockaddr_in6 *)&ap.a_addr)->sin6_addr;
2365 for (i = 0; i < 4; i++)
2366 addr6p[i] &= mask6p[i];
2375 /* arg `s' is domain name */
2389 printf("allowaddr: rule %d: ", NumAllowed);
2391 printf("numeric, ");
2392 getnameinfo((struct sockaddr *)&ap.a_addr,
2393 ((struct sockaddr *)&ap.a_addr)->sa_len,
2394 ip, sizeof ip, NULL, 0, NI_NUMERICHOST);
2395 printf("addr = %s, ", ip);
2396 getnameinfo((struct sockaddr *)&ap.a_mask,
2397 ((struct sockaddr *)&ap.a_mask)->sa_len,
2398 ip, sizeof ip, NULL, 0, NI_NUMERICHOST);
2399 printf("mask = %s; ", ip);
2401 printf("domainname = %s; ", ap.a_name);
2403 printf("port = %d\n", ap.port);
2406 if ((AllowedPeers = realloc(AllowedPeers,
2407 ++NumAllowed * sizeof(struct allowedpeer)))
2409 logerror("realloc");
2412 memcpy(&AllowedPeers[NumAllowed - 1], &ap, sizeof(struct allowedpeer));
2417 * Validate that the remote peer has permission to log to us.
2420 validate(struct sockaddr *sa, const char *hname)
2424 char *cp, name[NI_MAXHOST], ip[NI_MAXHOST], port[NI_MAXSERV];
2425 struct allowedpeer *ap;
2426 struct sockaddr_in *sin4, *a4p = NULL, *m4p = NULL;
2429 struct sockaddr_in6 *sin6, *a6p = NULL, *m6p = NULL;
2431 struct addrinfo hints, *res;
2434 if (NumAllowed == 0)
2435 /* traditional behaviour, allow everything */
2438 (void)strlcpy(name, hname, sizeof(name));
2439 memset(&hints, 0, sizeof(hints));
2440 hints.ai_family = PF_UNSPEC;
2441 hints.ai_socktype = SOCK_DGRAM;
2442 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
2443 if (getaddrinfo(name, NULL, &hints, &res) == 0)
2445 else if (strchr(name, '.') == NULL) {
2446 strlcat(name, ".", sizeof name);
2447 strlcat(name, LocalDomain, sizeof name);
2449 if (getnameinfo(sa, sa->sa_len, ip, sizeof ip, port, sizeof port,
2450 NI_NUMERICHOST | NI_NUMERICSERV) != 0)
2451 return (0); /* for safety, should not occur */
2452 dprintf("validate: dgram from IP %s, port %s, name %s;\n",
2456 /* now, walk down the list */
2457 for (i = 0, ap = AllowedPeers; i < NumAllowed; i++, ap++) {
2458 if (ap->port != 0 && ap->port != sport) {
2459 dprintf("rejected in rule %d due to port mismatch.\n", i);
2463 if (ap->isnumeric) {
2464 if (ap->a_addr.ss_family != sa->sa_family) {
2465 dprintf("rejected in rule %d due to address family mismatch.\n", i);
2468 if (ap->a_addr.ss_family == AF_INET) {
2469 sin4 = (struct sockaddr_in *)sa;
2470 a4p = (struct sockaddr_in *)&ap->a_addr;
2471 m4p = (struct sockaddr_in *)&ap->a_mask;
2472 if ((sin4->sin_addr.s_addr & m4p->sin_addr.s_addr)
2473 != a4p->sin_addr.s_addr) {
2474 dprintf("rejected in rule %d due to IP mismatch.\n", i);
2479 else if (ap->a_addr.ss_family == AF_INET6) {
2480 sin6 = (struct sockaddr_in6 *)sa;
2481 a6p = (struct sockaddr_in6 *)&ap->a_addr;
2482 m6p = (struct sockaddr_in6 *)&ap->a_mask;
2483 if (a6p->sin6_scope_id != 0 &&
2484 sin6->sin6_scope_id != a6p->sin6_scope_id) {
2485 dprintf("rejected in rule %d due to scope mismatch.\n", i);
2489 for (j = 0; j < 16; j += 4) {
2490 if ((*(u_int32_t *)&sin6->sin6_addr.s6_addr[j] & *(u_int32_t *)&m6p->sin6_addr.s6_addr[j])
2491 != *(u_int32_t *)&a6p->sin6_addr.s6_addr[j]) {
2497 dprintf("rejected in rule %d due to IP mismatch.\n", i);
2508 /* allow wildmatch */
2511 if (l2 > l1 || memcmp(cp, &name[l1 - l2], l2) != 0) {
2512 dprintf("rejected in rule %d due to name mismatch.\n", i);
2518 if (l2 != l1 || memcmp(cp, name, l1) != 0) {
2519 dprintf("rejected in rule %d due to name mismatch.\n", i);
2524 dprintf("accepted in rule %d.\n", i);
2525 return (1); /* hooray! */
2531 * Fairly similar to popen(3), but returns an open descriptor, as
2532 * opposed to a FILE *.
2535 p_open(const char *prog, pid_t *rpid)
2537 int pfd[2], nulldesc;
2539 sigset_t omask, mask;
2540 char *argv[4]; /* sh -c cmd NULL */
2543 if (pipe(pfd) == -1)
2545 if ((nulldesc = open(_PATH_DEVNULL, O_RDWR)) == -1)
2546 /* we are royally screwed anyway */
2550 sigaddset(&mask, SIGALRM);
2551 sigaddset(&mask, SIGHUP);
2552 sigprocmask(SIG_BLOCK, &mask, &omask);
2553 switch ((pid = fork())) {
2555 sigprocmask(SIG_SETMASK, &omask, 0);
2560 argv[0] = strdup("sh");
2561 argv[1] = strdup("-c");
2562 argv[2] = strdup(prog);
2564 if (argv[0] == NULL || argv[1] == NULL || argv[2] == NULL) {
2570 (void)setsid(); /* Avoid catching SIGHUPs. */
2573 * Throw away pending signals, and reset signal
2574 * behaviour to standard values.
2576 signal(SIGALRM, SIG_IGN);
2577 signal(SIGHUP, SIG_IGN);
2578 sigprocmask(SIG_SETMASK, &omask, 0);
2579 signal(SIGPIPE, SIG_DFL);
2580 signal(SIGQUIT, SIG_DFL);
2581 signal(SIGALRM, SIG_DFL);
2582 signal(SIGHUP, SIG_DFL);
2584 dup2(pfd[0], STDIN_FILENO);
2585 dup2(nulldesc, STDOUT_FILENO);
2586 dup2(nulldesc, STDERR_FILENO);
2589 (void)execvp(_PATH_BSHELL, argv);
2593 sigprocmask(SIG_SETMASK, &omask, 0);
2597 * Avoid blocking on a hung pipe. With O_NONBLOCK, we are
2598 * supposed to get an EWOULDBLOCK on writev(2), which is
2599 * caught by the logic above anyway, which will in turn close
2600 * the pipe, and fork a new logging subprocess if necessary.
2601 * The stale subprocess will be killed some time later unless
2602 * it terminated itself due to closing its input pipe (so we
2603 * get rid of really dead puppies).
2605 if (fcntl(pfd[1], F_SETFL, O_NONBLOCK) == -1) {
2607 (void)snprintf(errmsg, sizeof errmsg,
2608 "Warning: cannot change pipe to PID %d to "
2609 "non-blocking behaviour.",
2618 deadq_enter(pid_t pid, const char *name)
2624 * Be paranoid, if we can't signal the process, don't enter it
2625 * into the dead queue (perhaps it's already dead). If possible,
2626 * we try to fetch and log the child's status.
2628 if (kill(pid, 0) != 0) {
2629 if (waitpid(pid, &status, WNOHANG) > 0)
2630 log_deadchild(pid, status, name);
2634 p = malloc(sizeof(struct deadq_entry));
2641 p->dq_timeout = DQ_TIMO_INIT;
2642 TAILQ_INSERT_TAIL(&deadq_head, p, dq_entries);
2646 deadq_remove(pid_t pid)
2650 TAILQ_FOREACH(q, &deadq_head, dq_entries) {
2651 if (q->dq_pid == pid) {
2652 TAILQ_REMOVE(&deadq_head, q, dq_entries);
2662 log_deadchild(pid_t pid, int status, const char *name)
2668 errno = 0; /* Keep strerror() stuff out of logerror messages. */
2669 if (WIFSIGNALED(status)) {
2670 reason = "due to signal";
2671 code = WTERMSIG(status);
2673 reason = "with status";
2674 code = WEXITSTATUS(status);
2678 (void)snprintf(buf, sizeof buf,
2679 "Logging subprocess %d (%s) exited %s %d.",
2680 pid, name, reason, code);
2685 socksetup(int af, char *bindhostname)
2687 struct addrinfo hints, *res, *r;
2688 const char *bindservice;
2690 int error, maxs, *s, *socks;
2693 * We have to handle this case for backwards compatibility:
2694 * If there are two (or more) colons but no '[' and ']',
2695 * assume this is an inet6 address without a service.
2697 bindservice = "syslog";
2698 if (bindhostname != NULL) {
2700 if (*bindhostname == '[' &&
2701 (cp = strchr(bindhostname + 1, ']')) != NULL) {
2704 if (cp[1] == ':' && cp[2] != '\0')
2705 bindservice = cp + 2;
2708 cp = strchr(bindhostname, ':');
2709 if (cp != NULL && strchr(cp + 1, ':') == NULL) {
2712 bindservice = cp + 1;
2713 if (cp == bindhostname)
2714 bindhostname = NULL;
2721 memset(&hints, 0, sizeof(hints));
2722 hints.ai_flags = AI_PASSIVE;
2723 hints.ai_family = af;
2724 hints.ai_socktype = SOCK_DGRAM;
2725 error = getaddrinfo(bindhostname, bindservice, &hints, &res);
2727 logerror(gai_strerror(error));
2732 /* Count max number of sockets we may open */
2733 for (maxs = 0, r = res; r; r = r->ai_next, maxs++);
2734 socks = malloc((maxs+1) * sizeof(int));
2735 if (socks == NULL) {
2736 logerror("couldn't allocate memory for sockets");
2740 *socks = 0; /* num of sockets counter at start of array */
2742 for (r = res; r; r = r->ai_next) {
2744 *s = socket(r->ai_family, r->ai_socktype, r->ai_protocol);
2750 if (r->ai_family == AF_INET6) {
2751 if (setsockopt(*s, IPPROTO_IPV6, IPV6_V6ONLY,
2752 (char *)&on, sizeof (on)) < 0) {
2753 logerror("setsockopt");
2759 if (setsockopt(*s, SOL_SOCKET, SO_REUSEADDR,
2760 (char *)&on, sizeof (on)) < 0) {
2761 logerror("setsockopt");
2766 * RFC 3164 recommends that client side message
2767 * should come from the privileged syslogd port.
2769 * If the system administrator choose not to obey
2770 * this, we can skip the bind() step so that the
2771 * system will choose a port for us.
2774 if (bind(*s, r->ai_addr, r->ai_addrlen) < 0) {
2781 increase_rcvbuf(*s);
2785 dprintf("socksetup: new socket fd is %d\n", *s);
2803 increase_rcvbuf(int fd)
2805 socklen_t len, slen;
2809 if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &len, &slen) == 0) {
2810 if (len < RCVBUF_MINSIZE) {
2811 len = RCVBUF_MINSIZE;
2812 setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &len, sizeof(len));