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 /* Maximum number of characters in time of last occurrence */
73 #define MAXLINE 1024 /* maximum line length */
74 #define MAXSVLINE MAXLINE /* maximum saved line length */
75 #define DEFUPRI (LOG_USER|LOG_NOTICE)
76 #define DEFSPRI (LOG_KERN|LOG_CRIT)
77 #define TIMERINTVL 30 /* interval for checking flush, mark */
78 #define TTYMSGTIME 1 /* timeout passed to ttymsg */
79 #define RCVBUF_MINSIZE (80 * 1024) /* minimum size of dgram rcv buffer */
81 #include <sys/param.h>
82 #include <sys/ioctl.h>
84 #include <sys/queue.h>
85 #include <sys/resource.h>
86 #include <sys/socket.h>
88 #include <sys/syslimits.h>
93 #include <sys/types.h>
95 #include <netinet/in.h>
97 #include <arpa/inet.h>
110 #include <sysexits.h>
114 #include "pathnames.h"
118 #include <sys/syslog.h>
120 const char *ConfFile = _PATH_LOGCONF;
121 const char *PidFile = _PATH_LOGPID;
122 const char ctty[] = _PATH_CONSOLE;
124 #define dprintf if (Debug) printf
126 #define MAXUNAMES 20 /* maximum number of user names */
130 * We have two default sockets, one with 666 permissions,
131 * and one for privileged programs.
137 STAILQ_ENTRY(funix) next;
139 struct funix funix_secure = { -1, _PATH_LOG_PRIV, S_IRUSR | S_IWUSR,
141 struct funix funix_default = { -1, _PATH_LOG, DEFFILEMODE,
144 STAILQ_HEAD(, funix) funixes = { &funix_default,
145 &(funix_secure.next.stqe_next) };
151 #define IGN_CONS 0x001 /* don't print on console */
152 #define SYNC_FILE 0x002 /* do fsync on file after printing */
153 #define ADDDATE 0x004 /* add a date to the message */
154 #define MARK 0x008 /* this message is a mark */
155 #define ISKERNEL 0x010 /* kernel generated message */
158 * This structure represents the files that will have log
160 * We require f_file to be valid if f_type is F_FILE, F_CONSOLE, F_TTY
161 * or if f_type if F_PIPE and f_pid > 0.
165 struct filed *f_next; /* next in linked list */
166 short f_type; /* entry type, see below */
167 short f_file; /* file descriptor */
168 time_t f_time; /* time this was last written */
169 char *f_host; /* host from which to recd. */
170 u_char f_pmask[LOG_NFACILITIES+1]; /* priority mask */
171 u_char f_pcmp[LOG_NFACILITIES+1]; /* compare priority */
175 char *f_program; /* program this applies to */
177 char f_uname[MAXUNAMES][MAXLOGNAME];
179 char f_hname[MAXHOSTNAMELEN];
180 struct addrinfo *f_addr;
182 } f_forw; /* forwarding address */
183 char f_fname[MAXPATHLEN];
185 char f_pname[MAXPATHLEN];
189 char f_prevline[MAXSVLINE]; /* last message logged */
190 char f_lasttime[MAXDATELEN]; /* time of last occurrence */
191 char f_prevhost[MAXHOSTNAMELEN]; /* host from which recd. */
192 int f_prevpri; /* pri of f_prevline */
193 int f_prevlen; /* length of f_prevline */
194 int f_prevcount; /* repetition cnt of prevline */
195 u_int f_repeatcount; /* number of "repeated" msgs */
196 int f_flags; /* file-specific flags */
197 #define FFLAG_SYNC 0x01
198 #define FFLAG_NEEDSYNC 0x02
202 * Queue of about-to-be dead processes we should watch out for.
205 TAILQ_HEAD(stailhead, deadq_entry) deadq_head;
206 struct stailhead *deadq_headp;
211 TAILQ_ENTRY(deadq_entry) dq_entries;
215 * The timeout to apply to processes waiting on the dead queue. Unit
216 * of measure is `mark intervals', i.e. 20 minutes by default.
217 * Processes on the dead queue will be terminated after that time.
220 #define DQ_TIMO_INIT 2
222 typedef struct deadq_entry *dq_t;
226 * Struct to hold records of network addresses that are allowed to log
234 struct sockaddr_storage addr;
235 struct sockaddr_storage mask;
239 #define a_addr u.numeric.addr
240 #define a_mask u.numeric.mask
241 #define a_name u.name
246 * Intervals at which we flush out "message repeated" messages,
247 * in seconds after previous message is logged. After each flush,
248 * we move to the next interval until we reach the largest.
250 int repeatinterval[] = { 30, 120, 600 }; /* # of secs before flush */
251 #define MAXREPEAT ((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1)
252 #define REPEATTIME(f) ((f)->f_time + repeatinterval[(f)->f_repeatcount])
253 #define BACKOFF(f) { if (++(f)->f_repeatcount > MAXREPEAT) \
254 (f)->f_repeatcount = MAXREPEAT; \
257 /* values for f_type */
258 #define F_UNUSED 0 /* unused entry */
259 #define F_FILE 1 /* regular file */
260 #define F_TTY 2 /* terminal */
261 #define F_CONSOLE 3 /* console terminal */
262 #define F_FORW 4 /* remote machine */
263 #define F_USERS 5 /* list of users */
264 #define F_WALL 6 /* everyone logged on */
265 #define F_PIPE 7 /* pipe to program */
267 const char *TypeNames[8] = {
268 "UNUSED", "FILE", "TTY", "CONSOLE",
269 "FORW", "USERS", "WALL", "PIPE"
272 static struct filed *Files; /* Log files that we write to */
273 static struct filed consfile; /* Console */
275 static int Debug; /* debug flag */
276 static int Foreground = 0; /* Run in foreground, instead of daemonizing */
277 static int resolve = 1; /* resolve hostname */
278 static char LocalHostName[MAXHOSTNAMELEN]; /* our hostname */
279 static const char *LocalDomain; /* our local domain name */
280 static int *finet; /* Internet datagram socket */
281 static int fklog = -1; /* /dev/klog */
282 static int Initialized; /* set when we have initialized ourselves */
283 static int MarkInterval = 20 * 60; /* interval between marks in seconds */
284 static int MarkSeq; /* mark sequence number */
285 static int NoBind; /* don't bind() as suggested by RFC 3164 */
286 static int SecureMode; /* when true, receive only unix domain socks */
288 static int family = PF_UNSPEC; /* protocol family (IPv4, IPv6 or both) */
290 static int family = PF_INET; /* protocol family (IPv4 only) */
292 static int mask_C1 = 1; /* mask characters from 0x80 - 0x9F */
293 static int send_to_all; /* send message to all IPv4/IPv6 addresses */
294 static int use_bootfile; /* log entire bootfile for every kern msg */
295 static int no_compress; /* don't compress messages (1=pipes, 2=all) */
296 static int logflags = O_WRONLY|O_APPEND; /* flags used to open log files */
298 static char bootfile[MAXLINE+1]; /* booted kernel file */
300 struct allowedpeer *AllowedPeers; /* List of allowed peers */
301 static int NumAllowed; /* Number of entries in AllowedPeers */
302 static int RemoteAddDate; /* Always set the date on remote messages */
304 static int UniquePriority; /* Only log specified priority? */
305 static int LogFacPri; /* Put facility and priority in log message: */
306 /* 0=no, 1=numeric, 2=names */
307 static int KeepKernFac; /* Keep remotely logged kernel facility */
308 static int needdofsync = 0; /* Are any file(s) waiting to be fsynced? */
309 static struct pidfh *pfh;
311 volatile sig_atomic_t MarkSet, WantDie;
313 static int allowaddr(char *);
314 static void cfline(const char *, struct filed *,
315 const char *, const char *);
316 static const char *cvthname(struct sockaddr *);
317 static void deadq_enter(pid_t, const char *);
318 static int deadq_remove(pid_t);
319 static int decode(const char *, const CODE *);
320 static void die(int);
321 static void dodie(int);
322 static void dofsync(void);
323 static void domark(int);
324 static void fprintlog(struct filed *, int, const char *);
325 static int *socksetup(int, char *);
326 static void init(int);
327 static void logerror(const char *);
328 static void logmsg(int, const char *, const char *, int);
329 static void log_deadchild(pid_t, int, const char *);
330 static void markit(void);
331 static int skip_message(const char *, const char *, int);
332 static void printline(const char *, char *, int);
333 static void printsys(char *);
334 static int p_open(const char *, pid_t *);
335 static void readklog(void);
336 static void reapchild(int);
337 static void usage(void);
338 static int validate(struct sockaddr *, const char *);
339 static void unmapped(struct sockaddr *);
340 static void wallmsg(struct filed *, struct iovec *, const int iovlen);
341 static int waitdaemon(int, int, int);
342 static void timedout(int);
343 static void increase_rcvbuf(int);
346 close_filed(struct filed *f)
349 if (f == NULL || f->f_file == -1)
352 (void)close(f->f_file);
354 f->f_type = F_UNUSED;
358 main(int argc, char *argv[])
360 int ch, i, fdsrmax = 0, l;
361 struct sockaddr_un sunx, fromunix;
362 struct sockaddr_storage frominet;
364 char line[MAXLINE + 1];
367 struct timeval tv, *tvp;
368 struct sigaction sact;
369 struct funix *fx, *fx1;
371 pid_t ppid = 1, spid;
374 if (madvise(NULL, 0, MADV_PROTECT) != 0)
375 dprintf("madvise() failed: %s\n", strerror(errno));
378 while ((ch = getopt(argc, argv, "468Aa:b:cCdf:Fkl:m:nNop:P:sS:Tuv"))
395 case 'a': /* allow specific network addresses only */
396 if (allowaddr(optarg) == -1)
400 bindhostname = optarg;
408 case 'd': /* debug */
411 case 'f': /* configuration file */
414 case 'F': /* run in foreground instead of daemon */
417 case 'k': /* keep remote kern fac */
426 if (optarg[0] == '/') {
429 } else if ((name = strchr(optarg, ':')) != NULL) {
432 errx(1, "socket name must be absolute "
434 if (isdigit(*optarg)) {
435 perml = strtol(optarg, &ep, 8);
436 if (*ep || perml < 0 ||
437 perml & ~(S_IRWXU|S_IRWXG|S_IRWXO))
438 errx(1, "invalid mode %s, exiting",
440 mode = (mode_t )perml;
442 errx(1, "invalid mode %s, exiting",
444 } else /* doesn't begin with '/', and no ':' */
445 errx(1, "can't parse path %s", optarg);
447 if (strlen(name) >= sizeof(sunx.sun_path))
448 errx(1, "%s path too long, exiting", name);
449 if ((fx = malloc(sizeof(struct funix))) == NULL)
450 errx(1, "malloc failed");
454 STAILQ_INSERT_TAIL(&funixes, fx, next);
457 case 'm': /* mark interval */
458 MarkInterval = atoi(optarg) * 60;
471 if (strlen(optarg) >= sizeof(sunx.sun_path))
472 errx(1, "%s path too long, exiting", optarg);
473 funix_default.name = optarg;
475 case 'P': /* path for alt. PID */
478 case 's': /* no network mode */
481 case 'S': /* path for privileged originator */
482 if (strlen(optarg) >= sizeof(sunx.sun_path))
483 errx(1, "%s path too long, exiting", optarg);
484 funix_secure.name = optarg;
489 case 'u': /* only log specified priority */
492 case 'v': /* log facility and priority */
498 if ((argc -= optind) != 0)
501 pfh = pidfile_open(PidFile, 0600, &spid);
504 errx(1, "syslogd already running, pid: %d", spid);
505 warn("cannot open pid file");
508 if ((!Foreground) && (!Debug)) {
509 ppid = waitdaemon(0, 0, 30);
511 warn("could not become daemon");
522 consfile.f_type = F_CONSOLE;
523 (void)strlcpy(consfile.f_un.f_fname, ctty + sizeof _PATH_DEV - 1,
524 sizeof(consfile.f_un.f_fname));
525 (void)strlcpy(bootfile, getbootfile(), sizeof(bootfile));
526 (void)signal(SIGTERM, dodie);
527 (void)signal(SIGINT, Debug ? dodie : SIG_IGN);
528 (void)signal(SIGQUIT, Debug ? dodie : SIG_IGN);
530 * We don't want the SIGCHLD and SIGHUP handlers to interfere
531 * with each other; they are likely candidates for being called
532 * simultaneously (SIGHUP closes pipe descriptor, process dies,
536 sigaddset(&mask, SIGHUP);
537 sact.sa_handler = reapchild;
539 sact.sa_flags = SA_RESTART;
540 (void)sigaction(SIGCHLD, &sact, NULL);
541 (void)signal(SIGALRM, domark);
542 (void)signal(SIGPIPE, SIG_IGN); /* We'll catch EPIPE instead. */
543 (void)alarm(TIMERINTVL);
545 TAILQ_INIT(&deadq_head);
548 #define SUN_LEN(unp) (strlen((unp)->sun_path) + 2)
550 STAILQ_FOREACH_SAFE(fx, &funixes, next, fx1) {
551 (void)unlink(fx->name);
552 memset(&sunx, 0, sizeof(sunx));
553 sunx.sun_family = AF_LOCAL;
554 (void)strlcpy(sunx.sun_path, fx->name, sizeof(sunx.sun_path));
555 fx->s = socket(PF_LOCAL, SOCK_DGRAM, 0);
557 bind(fx->s, (struct sockaddr *)&sunx, SUN_LEN(&sunx)) < 0 ||
558 chmod(fx->name, fx->mode) < 0) {
559 (void)snprintf(line, sizeof line,
560 "cannot create %s", fx->name);
562 dprintf("cannot create %s (%d)\n", fx->name, errno);
563 if (fx == &funix_default || fx == &funix_secure)
566 STAILQ_REMOVE(&funixes, fx, funix, next);
570 increase_rcvbuf(fx->s);
573 finet = socksetup(family, bindhostname);
577 for (i = 0; i < *finet; i++) {
578 if (shutdown(finet[i+1], SHUT_RD) < 0 &&
580 logerror("shutdown");
586 dprintf("listening on inet and/or inet6 socket\n");
588 dprintf("sending on inet and/or inet6 socket\n");
591 if ((fklog = open(_PATH_KLOG, O_RDONLY, 0)) >= 0)
592 if (fcntl(fklog, F_SETFL, O_NONBLOCK) < 0)
595 dprintf("can't open %s (%d)\n", _PATH_KLOG, errno);
597 /* tuck my process id away */
600 dprintf("off & running....\n");
603 /* prevent SIGHUP and SIGCHLD handlers from running in parallel */
605 sigaddset(&mask, SIGCHLD);
606 sact.sa_handler = init;
608 sact.sa_flags = SA_RESTART;
609 (void)sigaction(SIGHUP, &sact, NULL);
612 tv.tv_sec = tv.tv_usec = 0;
614 if (fklog != -1 && fklog > fdsrmax)
616 if (finet && !SecureMode) {
617 for (i = 0; i < *finet; i++) {
618 if (finet[i+1] != -1 && finet[i+1] > fdsrmax)
619 fdsrmax = finet[i+1];
622 STAILQ_FOREACH(fx, &funixes, next)
626 fdsr = (fd_set *)calloc(howmany(fdsrmax+1, NFDBITS),
629 errx(1, "calloc fd_set");
637 bzero(fdsr, howmany(fdsrmax+1, NFDBITS) *
642 if (finet && !SecureMode) {
643 for (i = 0; i < *finet; i++) {
644 if (finet[i+1] != -1)
645 FD_SET(finet[i+1], fdsr);
648 STAILQ_FOREACH(fx, &funixes, next)
651 i = select(fdsrmax+1, fdsr, NULL, NULL,
652 needdofsync ? &tv : tvp);
668 if (fklog != -1 && FD_ISSET(fklog, fdsr))
670 if (finet && !SecureMode) {
671 for (i = 0; i < *finet; i++) {
672 if (FD_ISSET(finet[i+1], fdsr)) {
673 len = sizeof(frominet);
674 l = recvfrom(finet[i+1], line, MAXLINE,
675 0, (struct sockaddr *)&frominet,
679 hname = cvthname((struct sockaddr *)&frominet);
680 unmapped((struct sockaddr *)&frominet);
681 if (validate((struct sockaddr *)&frominet, hname))
682 printline(hname, line, RemoteAddDate ? ADDDATE : 0);
683 } else if (l < 0 && errno != EINTR)
684 logerror("recvfrom inet");
688 STAILQ_FOREACH(fx, &funixes, next) {
689 if (FD_ISSET(fx->s, fdsr)) {
690 len = sizeof(fromunix);
691 l = recvfrom(fx->s, line, MAXLINE, 0,
692 (struct sockaddr *)&fromunix, &len);
695 printline(LocalHostName, line, 0);
696 } else if (l < 0 && errno != EINTR)
697 logerror("recvfrom unix");
706 unmapped(struct sockaddr *sa)
708 struct sockaddr_in6 *sin6;
709 struct sockaddr_in sin4;
711 if (sa->sa_family != AF_INET6)
713 if (sa->sa_len != sizeof(struct sockaddr_in6) ||
714 sizeof(sin4) > sa->sa_len)
716 sin6 = (struct sockaddr_in6 *)sa;
717 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
720 memset(&sin4, 0, sizeof(sin4));
721 sin4.sin_family = AF_INET;
722 sin4.sin_len = sizeof(struct sockaddr_in);
723 memcpy(&sin4.sin_addr, &sin6->sin6_addr.s6_addr[12],
724 sizeof(sin4.sin_addr));
725 sin4.sin_port = sin6->sin6_port;
727 memcpy(sa, &sin4, sin4.sin_len);
734 fprintf(stderr, "%s\n%s\n%s\n%s\n",
735 "usage: syslogd [-468ACcdFknosTuv] [-a allowed_peer]",
736 " [-b bind_address] [-f config_file]",
737 " [-l [mode:]path] [-m mark_interval]",
738 " [-P pid_file] [-p log_socket]");
743 * Take a raw input line, decode the message, and print the message
744 * on the appropriate log files.
747 printline(const char *hname, char *msg, int flags)
752 char line[MAXLINE + 1];
754 /* test for special codes */
759 n = strtol(p + 1, &q, 10);
760 if (*q == '>' && n >= 0 && n < INT_MAX && errno == 0) {
765 if (pri &~ (LOG_FACMASK|LOG_PRIMASK))
769 * Don't allow users to log kernel messages.
770 * NOTE: since LOG_KERN == 0 this will also match
771 * messages with no facility specified.
773 if ((pri & LOG_FACMASK) == LOG_KERN && !KeepKernFac)
774 pri = LOG_MAKEPRI(LOG_USER, LOG_PRI(pri));
778 while ((c = (unsigned char)*p++) != '\0' &&
779 q < &line[sizeof(line) - 4]) {
780 if (mask_C1 && (c & 0x80) && c < 0xA0) {
785 if (isascii(c) && iscntrl(c)) {
788 } else if (c == '\t') {
800 logmsg(pri, line, hname, flags);
804 * Read /dev/klog while data are available, split into lines.
809 char *p, *q, line[MAXLINE + 1];
814 i = read(fklog, line + len, MAXLINE - 1 - len);
816 line[i + len] = '\0';
818 if (i < 0 && errno != EINTR && errno != EAGAIN) {
825 for (p = line; (q = strchr(p, '\n')) != NULL; p = q + 1) {
830 if (len >= MAXLINE - 1) {
835 memmove(line, p, len + 1);
842 * Take a raw input line from /dev/klog, format similar to syslog().
849 int flags, isprintf, pri;
851 flags = ISKERNEL | SYNC_FILE | ADDDATE; /* fsync after write */
857 n = strtol(p + 1, &q, 10);
858 if (*q == '>' && n >= 0 && n < INT_MAX && errno == 0) {
865 * Kernel printf's and LOG_CONSOLE messages have been displayed
866 * on the console already.
868 if (isprintf || (pri & LOG_FACMASK) == LOG_CONSOLE)
870 if (pri &~ (LOG_FACMASK|LOG_PRIMASK))
872 logmsg(pri, p, LocalHostName, flags);
878 * Match a program or host name against a specification.
879 * Return a non-0 value if the message must be ignored
880 * based on the specification.
883 skip_message(const char *name, const char *spec, int checkcase)
888 /* Behaviour on explicit match */
903 s = strstr (spec, name);
905 s = strcasestr (spec, name);
908 prev = (s == spec ? ',' : *(s - 1));
909 next = *(s + strlen (name));
911 if (prev == ',' && (next == '\0' || next == ','))
912 /* Explicit match: skip iff the spec is an
917 /* No explicit match for this name: skip the message iff
918 the spec is an inclusive one. */
923 * Log a message to the appropriate log files, users, etc. based on
927 logmsg(int pri, const char *msg, const char *from, int flags)
930 int i, fac, msglen, omask, prilev;
931 const char *timestamp;
932 char prog[NAME_MAX+1];
935 dprintf("logmsg: pri %o, flags %x, from %s, msg %s\n",
936 pri, flags, from, msg);
938 omask = sigblock(sigmask(SIGHUP)|sigmask(SIGALRM));
941 * Check to see if msg looks non-standard.
943 msglen = strlen(msg);
944 if (msglen < MAXDATELEN || msg[3] != ' ' || msg[6] != ' ' ||
945 msg[9] != ':' || msg[12] != ':' || msg[15] != ' ')
949 if (flags & ADDDATE) {
950 timestamp = ctime(&now) + 4;
954 msglen -= MAXDATELEN;
957 /* skip leading blanks */
958 while (isspace(*msg)) {
963 /* extract facility and priority level */
965 fac = LOG_NFACILITIES;
969 /* Check maximum facility number. */
970 if (fac > LOG_NFACILITIES) {
971 (void)sigsetmask(omask);
975 prilev = LOG_PRI(pri);
977 /* extract program name */
978 for (i = 0; i < NAME_MAX; i++) {
979 if (!isprint(msg[i]) || msg[i] == ':' || msg[i] == '[' ||
980 msg[i] == '/' || isspace(msg[i]))
986 /* add kernel prefix for kernel messages */
987 if (flags & ISKERNEL) {
988 snprintf(buf, sizeof(buf), "%s: %s",
989 use_bootfile ? bootfile : "kernel", msg);
991 msglen = strlen(buf);
994 /* log the message to the particular outputs */
998 * Open in non-blocking mode to avoid hangs during open
999 * and close(waiting for the port to drain).
1001 f->f_file = open(ctty, O_WRONLY | O_NONBLOCK, 0);
1003 if (f->f_file >= 0) {
1004 (void)strlcpy(f->f_lasttime, timestamp,
1005 sizeof(f->f_lasttime));
1006 fprintlog(f, flags, msg);
1010 (void)sigsetmask(omask);
1013 for (f = Files; f; f = f->f_next) {
1014 /* skip messages that are incorrect priority */
1015 if (!(((f->f_pcmp[fac] & PRI_EQ) && (f->f_pmask[fac] == prilev))
1016 ||((f->f_pcmp[fac] & PRI_LT) && (f->f_pmask[fac] < prilev))
1017 ||((f->f_pcmp[fac] & PRI_GT) && (f->f_pmask[fac] > prilev))
1019 || f->f_pmask[fac] == INTERNAL_NOPRI)
1022 /* skip messages with the incorrect hostname */
1023 if (skip_message(from, f->f_host, 0))
1026 /* skip messages with the incorrect program name */
1027 if (skip_message(prog, f->f_program, 1))
1030 /* skip message to console if it has already been printed */
1031 if (f->f_type == F_CONSOLE && (flags & IGN_CONS))
1034 /* don't output marks to recently written files */
1035 if ((flags & MARK) && (now - f->f_time) < MarkInterval / 2)
1039 * suppress duplicate lines to this file
1041 if (no_compress - (f->f_type != F_PIPE) < 1 &&
1042 (flags & MARK) == 0 && msglen == f->f_prevlen &&
1043 !strcmp(msg, f->f_prevline) &&
1044 !strcasecmp(from, f->f_prevhost)) {
1045 (void)strlcpy(f->f_lasttime, timestamp,
1046 sizeof(f->f_lasttime));
1048 dprintf("msg repeated %d times, %ld sec of %d\n",
1049 f->f_prevcount, (long)(now - f->f_time),
1050 repeatinterval[f->f_repeatcount]);
1052 * If domark would have logged this by now,
1053 * flush it now (so we don't hold isolated messages),
1054 * but back off so we'll flush less often
1057 if (now > REPEATTIME(f)) {
1058 fprintlog(f, flags, (char *)NULL);
1062 /* new line, save it */
1064 fprintlog(f, 0, (char *)NULL);
1065 f->f_repeatcount = 0;
1067 (void)strlcpy(f->f_lasttime, timestamp,
1068 sizeof(f->f_lasttime));
1069 (void)strlcpy(f->f_prevhost, from,
1070 sizeof(f->f_prevhost));
1071 if (msglen < MAXSVLINE) {
1072 f->f_prevlen = msglen;
1073 (void)strlcpy(f->f_prevline, msg, sizeof(f->f_prevline));
1074 fprintlog(f, flags, (char *)NULL);
1076 f->f_prevline[0] = 0;
1078 fprintlog(f, flags, msg);
1082 (void)sigsetmask(omask);
1090 for (f = Files; f; f = f->f_next) {
1091 if ((f->f_type == F_FILE) &&
1092 (f->f_flags & FFLAG_NEEDSYNC)) {
1093 f->f_flags &= ~FFLAG_NEEDSYNC;
1094 (void)fsync(f->f_file);
1101 fprintlog(struct filed *f, int flags, const char *msg)
1103 struct iovec iov[IOV_SIZE];
1106 int i, l, lsent = 0;
1107 char line[MAXLINE + 1], repbuf[80], greetings[200], *wmsg = NULL;
1108 char nul[] = "", space[] = " ", lf[] = "\n", crlf[] = "\r\n";
1112 if (f->f_type == F_WALL) {
1113 v->iov_base = greetings;
1114 /* The time displayed is not synchornized with the other log
1115 * destinations (like messages). Following fragment was using
1116 * ctime(&now), which was updating the time every 30 sec.
1117 * With f_lasttime, time is synchronized correctly.
1119 v->iov_len = snprintf(greetings, sizeof greetings,
1120 "\r\n\7Message from syslogd@%s at %.24s ...\r\n",
1121 f->f_prevhost, f->f_lasttime);
1122 if (v->iov_len >= sizeof greetings)
1123 v->iov_len = sizeof greetings - 1;
1129 v->iov_base = f->f_lasttime;
1130 v->iov_len = strlen(f->f_lasttime);
1132 v->iov_base = space;
1138 static char fp_buf[30]; /* Hollow laugh */
1139 int fac = f->f_prevpri & LOG_FACMASK;
1140 int pri = LOG_PRI(f->f_prevpri);
1141 const char *f_s = NULL;
1142 char f_n[5]; /* Hollow laugh */
1143 const char *p_s = NULL;
1144 char p_n[5]; /* Hollow laugh */
1146 if (LogFacPri > 1) {
1149 for (c = facilitynames; c->c_name; c++) {
1150 if (c->c_val == fac) {
1155 for (c = prioritynames; c->c_name; c++) {
1156 if (c->c_val == pri) {
1163 snprintf(f_n, sizeof f_n, "%d", LOG_FAC(fac));
1167 snprintf(p_n, sizeof p_n, "%d", pri);
1170 snprintf(fp_buf, sizeof fp_buf, "<%s.%s> ", f_s, p_s);
1171 v->iov_base = fp_buf;
1172 v->iov_len = strlen(fp_buf);
1179 v->iov_base = f->f_prevhost;
1180 v->iov_len = strlen(v->iov_base);
1182 v->iov_base = space;
1187 wmsg = strdup(msg); /* XXX iov_base needs a `const' sibling. */
1193 v->iov_len = strlen(msg);
1194 } else if (f->f_prevcount > 1) {
1195 v->iov_base = repbuf;
1196 v->iov_len = snprintf(repbuf, sizeof repbuf,
1197 "last message repeated %d times", f->f_prevcount);
1199 v->iov_base = f->f_prevline;
1200 v->iov_len = f->f_prevlen;
1204 dprintf("Logging to %s", TypeNames[f->f_type]);
1207 switch (f->f_type) {
1214 port = (int)ntohs(((struct sockaddr_in *)
1215 (f->f_un.f_forw.f_addr->ai_addr))->sin_port);
1217 dprintf(" %s:%d\n", f->f_un.f_forw.f_hname, port);
1219 dprintf(" %s\n", f->f_un.f_forw.f_hname);
1221 /* check for local vs remote messages */
1222 if (strcasecmp(f->f_prevhost, LocalHostName))
1223 l = snprintf(line, sizeof line - 1,
1224 "<%d>%.15s Forwarded from %s: %s",
1225 f->f_prevpri, (char *)iov[0].iov_base,
1226 f->f_prevhost, (char *)iov[5].iov_base);
1228 l = snprintf(line, sizeof line - 1, "<%d>%.15s %s",
1229 f->f_prevpri, (char *)iov[0].iov_base,
1230 (char *)iov[5].iov_base);
1233 else if (l > MAXLINE)
1237 for (r = f->f_un.f_forw.f_addr; r; r = r->ai_next) {
1238 for (i = 0; i < *finet; i++) {
1241 * should we check AF first, or just
1242 * trial and error? FWD
1245 address_family_of(finet[i+1]))
1247 lsent = sendto(finet[i+1], line, l, 0,
1248 r->ai_addr, r->ai_addrlen);
1252 if (lsent == l && !send_to_all)
1255 dprintf("lsent/l: %d/%d\n", lsent, l);
1270 /* case ENOTSOCK: */
1272 /* case EMSGSIZE: */
1275 /* case ECONNREFUSED: */
1277 dprintf("removing entry: errno=%d\n", e);
1278 f->f_type = F_UNUSED;
1286 dprintf(" %s\n", f->f_un.f_fname);
1289 if (writev(f->f_file, iov, IOV_SIZE) < 0) {
1291 * If writev(2) fails for potentially transient errors
1292 * like the filesystem being full, ignore it.
1293 * Otherwise remove this logfile from the list.
1295 if (errno != ENOSPC) {
1299 logerror(f->f_un.f_fname);
1301 } else if ((flags & SYNC_FILE) && (f->f_flags & FFLAG_SYNC)) {
1302 f->f_flags |= FFLAG_NEEDSYNC;
1308 dprintf(" %s\n", f->f_un.f_pipe.f_pname);
1311 if (f->f_un.f_pipe.f_pid == 0) {
1312 if ((f->f_file = p_open(f->f_un.f_pipe.f_pname,
1313 &f->f_un.f_pipe.f_pid)) < 0) {
1314 f->f_type = F_UNUSED;
1315 logerror(f->f_un.f_pipe.f_pname);
1319 if (writev(f->f_file, iov, IOV_SIZE) < 0) {
1322 if (f->f_un.f_pipe.f_pid > 0)
1323 deadq_enter(f->f_un.f_pipe.f_pid,
1324 f->f_un.f_pipe.f_pname);
1325 f->f_un.f_pipe.f_pid = 0;
1327 logerror(f->f_un.f_pipe.f_pname);
1332 if (flags & IGN_CONS) {
1333 dprintf(" (ignored)\n");
1339 dprintf(" %s%s\n", _PATH_DEV, f->f_un.f_fname);
1343 errno = 0; /* ttymsg() only sometimes returns an errno */
1344 if ((msgret = ttymsg(iov, IOV_SIZE, f->f_un.f_fname, 10))) {
1345 f->f_type = F_UNUSED;
1355 wallmsg(f, iov, IOV_SIZE);
1363 * WALLMSG -- Write a message to the world at large
1365 * Write the specified message to either the entire
1366 * world, or a list of approved users.
1369 wallmsg(struct filed *f, struct iovec *iov, const int iovlen)
1371 static int reenter; /* avoid calling ourselves */
1380 while ((ut = getutxent()) != NULL) {
1381 if (ut->ut_type != USER_PROCESS)
1383 if (f->f_type == F_WALL) {
1384 if ((p = ttymsg(iov, iovlen, ut->ut_line,
1385 TTYMSGTIME)) != NULL) {
1386 errno = 0; /* already in msg */
1391 /* should we send the message to this user? */
1392 for (i = 0; i < MAXUNAMES; i++) {
1393 if (!f->f_un.f_uname[i][0])
1395 if (!strcmp(f->f_un.f_uname[i], ut->ut_user)) {
1396 if ((p = ttymsg(iov, iovlen, ut->ut_line,
1397 TTYMSGTIME)) != NULL) {
1398 errno = 0; /* already in msg */
1410 reapchild(int signo __unused)
1416 while ((pid = wait3(&status, WNOHANG, (struct rusage *)NULL)) > 0) {
1418 /* Don't tell while we are initting. */
1421 /* First, look if it's a process from the dead queue. */
1422 if (deadq_remove(pid))
1425 /* Now, look in list of active processes. */
1426 for (f = Files; f; f = f->f_next)
1427 if (f->f_type == F_PIPE &&
1428 f->f_un.f_pipe.f_pid == pid) {
1430 f->f_un.f_pipe.f_pid = 0;
1431 log_deadchild(pid, status,
1432 f->f_un.f_pipe.f_pname);
1441 * Return a printable representation of a host address.
1444 cvthname(struct sockaddr *f)
1447 sigset_t omask, nmask;
1448 static char hname[NI_MAXHOST], ip[NI_MAXHOST];
1450 error = getnameinfo((struct sockaddr *)f,
1451 ((struct sockaddr *)f)->sa_len,
1452 ip, sizeof ip, NULL, 0, NI_NUMERICHOST);
1453 dprintf("cvthname(%s)\n", ip);
1456 dprintf("Malformed from address %s\n", gai_strerror(error));
1462 sigemptyset(&nmask);
1463 sigaddset(&nmask, SIGHUP);
1464 sigprocmask(SIG_BLOCK, &nmask, &omask);
1465 error = getnameinfo((struct sockaddr *)f,
1466 ((struct sockaddr *)f)->sa_len,
1467 hname, sizeof hname, NULL, 0, NI_NAMEREQD);
1468 sigprocmask(SIG_SETMASK, &omask, NULL);
1470 dprintf("Host name for your address (%s) unknown\n", ip);
1474 if (hl > 0 && hname[hl-1] == '.')
1476 trimdomain(hname, hl);
1488 domark(int signo __unused)
1495 * Print syslogd errors some place.
1498 logerror(const char *type)
1501 static int recursed = 0;
1503 /* If there's an error while trying to log an error, give up. */
1509 sizeof buf, "syslogd: %s: %s", type, strerror(errno));
1511 (void)snprintf(buf, sizeof buf, "syslogd: %s", type);
1513 dprintf("%s\n", buf);
1514 logmsg(LOG_SYSLOG|LOG_ERR, buf, LocalHostName, ADDDATE);
1523 int was_initialized;
1526 was_initialized = Initialized;
1527 Initialized = 0; /* Don't log SIGCHLDs. */
1528 for (f = Files; f != NULL; f = f->f_next) {
1529 /* flush any pending output */
1531 fprintlog(f, 0, (char *)NULL);
1532 if (f->f_type == F_PIPE && f->f_un.f_pipe.f_pid > 0) {
1534 f->f_un.f_pipe.f_pid = 0;
1537 Initialized = was_initialized;
1539 dprintf("syslogd: exiting on signal %d\n", signo);
1540 (void)snprintf(buf, sizeof(buf), "exiting on signal %d", signo);
1544 STAILQ_FOREACH(fx, &funixes, next)
1545 (void)unlink(fx->name);
1546 pidfile_remove(pfh);
1552 * INIT -- Initialize syslogd from configuration table
1559 struct filed *f, *next, **nextp;
1561 char cline[LINE_MAX];
1562 char prog[LINE_MAX];
1563 char host[MAXHOSTNAMELEN];
1564 char oldLocalHostName[MAXHOSTNAMELEN];
1565 char hostMsg[2*MAXHOSTNAMELEN+40];
1566 char bootfileMsg[LINE_MAX];
1571 * Load hostname (may have changed).
1574 (void)strlcpy(oldLocalHostName, LocalHostName,
1575 sizeof(oldLocalHostName));
1576 if (gethostname(LocalHostName, sizeof(LocalHostName)))
1577 err(EX_OSERR, "gethostname() failed");
1578 if ((p = strchr(LocalHostName, '.')) != NULL) {
1586 * Close all open log files.
1589 for (f = Files; f != NULL; f = next) {
1590 /* flush any pending output */
1592 fprintlog(f, 0, (char *)NULL);
1594 switch (f->f_type) {
1602 if (f->f_un.f_pipe.f_pid > 0) {
1604 deadq_enter(f->f_un.f_pipe.f_pid,
1605 f->f_un.f_pipe.f_pname);
1607 f->f_un.f_pipe.f_pid = 0;
1611 if (f->f_program) free(f->f_program);
1612 if (f->f_host) free(f->f_host);
1618 /* open the configuration file */
1619 if ((cf = fopen(ConfFile, "r")) == NULL) {
1620 dprintf("cannot open %s\n", ConfFile);
1621 *nextp = (struct filed *)calloc(1, sizeof(*f));
1622 if (*nextp == NULL) {
1626 cfline("*.ERR\t/dev/console", *nextp, "*", "*");
1627 (*nextp)->f_next = (struct filed *)calloc(1, sizeof(*f));
1628 if ((*nextp)->f_next == NULL) {
1632 cfline("*.PANIC\t*", (*nextp)->f_next, "*", "*");
1638 * Foreach line in the conf table, open that file.
1641 (void)strlcpy(host, "*", sizeof(host));
1642 (void)strlcpy(prog, "*", sizeof(prog));
1643 while (fgets(cline, sizeof(cline), cf) != NULL) {
1645 * check for end-of-section, comments, strip off trailing
1646 * spaces and newline character. #!prog is treated specially:
1647 * following lines apply only to that program.
1649 for (p = cline; isspace(*p); ++p)
1655 if (*p != '!' && *p != '+' && *p != '-')
1658 if (*p == '+' || *p == '-') {
1662 if ((!*p) || (*p == '*')) {
1663 (void)strlcpy(host, "*", sizeof(host));
1668 for (i = 1; i < MAXHOSTNAMELEN - 1; i++) {
1669 if (!isalnum(*p) && *p != '.' && *p != '-'
1670 && *p != ',' && *p != ':' && *p != '%')
1679 while (isspace(*p)) p++;
1680 if ((!*p) || (*p == '*')) {
1681 (void)strlcpy(prog, "*", sizeof(prog));
1684 for (i = 0; i < LINE_MAX - 1; i++) {
1685 if (!isprint(p[i]) || isspace(p[i]))
1692 for (p = cline + 1; *p != '\0'; p++) {
1695 if (*(p - 1) == '\\') {
1703 for (i = strlen(cline) - 1; i >= 0 && isspace(cline[i]); i--)
1705 f = (struct filed *)calloc(1, sizeof(*f));
1712 cfline(cline, f, prog, host);
1715 /* close the configuration file */
1722 for (f = Files; f; f = f->f_next) {
1723 for (i = 0; i <= LOG_NFACILITIES; i++)
1724 if (f->f_pmask[i] == INTERNAL_NOPRI)
1727 printf("%d ", f->f_pmask[i]);
1728 printf("%s: ", TypeNames[f->f_type]);
1729 switch (f->f_type) {
1731 printf("%s", f->f_un.f_fname);
1736 printf("%s%s", _PATH_DEV, f->f_un.f_fname);
1740 port = (int)ntohs(((struct sockaddr_in *)
1741 (f->f_un.f_forw.f_addr->ai_addr))->sin_port);
1744 f->f_un.f_forw.f_hname, port);
1746 printf("%s", f->f_un.f_forw.f_hname);
1751 printf("%s", f->f_un.f_pipe.f_pname);
1755 for (i = 0; i < MAXUNAMES && *f->f_un.f_uname[i]; i++)
1756 printf("%s, ", f->f_un.f_uname[i]);
1760 printf(" (%s)", f->f_program);
1765 logmsg(LOG_SYSLOG|LOG_INFO, "syslogd: restart", LocalHostName, ADDDATE);
1766 dprintf("syslogd: restarted\n");
1768 * Log a change in hostname, but only on a restart.
1770 if (signo != 0 && strcmp(oldLocalHostName, LocalHostName) != 0) {
1771 (void)snprintf(hostMsg, sizeof(hostMsg),
1772 "syslogd: hostname changed, \"%s\" to \"%s\"",
1773 oldLocalHostName, LocalHostName);
1774 logmsg(LOG_SYSLOG|LOG_INFO, hostMsg, LocalHostName, ADDDATE);
1775 dprintf("%s\n", hostMsg);
1778 * Log the kernel boot file if we aren't going to use it as
1779 * the prefix, and if this is *not* a restart.
1781 if (signo == 0 && !use_bootfile) {
1782 (void)snprintf(bootfileMsg, sizeof(bootfileMsg),
1783 "syslogd: kernel boot file is %s", bootfile);
1784 logmsg(LOG_KERN|LOG_INFO, bootfileMsg, LocalHostName, ADDDATE);
1785 dprintf("%s\n", bootfileMsg);
1790 * Crack a configuration file line
1793 cfline(const char *line, struct filed *f, const char *prog, const char *host)
1795 struct addrinfo hints, *res;
1796 int error, i, pri, syncfile;
1799 char buf[MAXLINE], ebuf[100];
1801 dprintf("cfline(\"%s\", f, \"%s\", \"%s\")\n", line, prog, host);
1803 errno = 0; /* keep strerror() stuff out of logerror messages */
1805 /* clear out file entry */
1806 memset(f, 0, sizeof(*f));
1807 for (i = 0; i <= LOG_NFACILITIES; i++)
1808 f->f_pmask[i] = INTERNAL_NOPRI;
1810 /* save hostname if any */
1811 if (host && *host == '*')
1816 f->f_host = strdup(host);
1817 if (f->f_host == NULL) {
1821 hl = strlen(f->f_host);
1822 if (hl > 0 && f->f_host[hl-1] == '.')
1823 f->f_host[--hl] = '\0';
1824 trimdomain(f->f_host, hl);
1827 /* save program name if any */
1828 if (prog && *prog == '*')
1831 f->f_program = strdup(prog);
1832 if (f->f_program == NULL) {
1838 /* scan through the list of selectors */
1839 for (p = line; *p && *p != '\t' && *p != ' ';) {
1844 /* find the end of this facility name list */
1845 for (q = p; *q && *q != '\t' && *q != ' ' && *q++ != '.'; )
1848 /* get the priority comparison */
1876 /* collect priority name */
1877 for (bp = buf; *q && !strchr("\t,; ", *q); )
1882 while (strchr(",;", *q))
1885 /* decode priority name */
1888 pri_cmp = PRI_LT | PRI_EQ | PRI_GT;
1890 /* Ignore trailing spaces. */
1891 for (i = strlen(buf) - 1; i >= 0 && buf[i] == ' '; i--)
1894 pri = decode(buf, prioritynames);
1897 (void)snprintf(ebuf, sizeof ebuf,
1898 "unknown priority name \"%s\"", buf);
1904 pri_cmp = (UniquePriority)
1909 pri_cmp ^= PRI_LT | PRI_EQ | PRI_GT;
1911 /* scan facilities */
1912 while (*p && !strchr("\t.; ", *p)) {
1913 for (bp = buf; *p && !strchr("\t,;. ", *p); )
1918 for (i = 0; i < LOG_NFACILITIES; i++) {
1919 f->f_pmask[i] = pri;
1920 f->f_pcmp[i] = pri_cmp;
1923 i = decode(buf, facilitynames);
1926 (void)snprintf(ebuf, sizeof ebuf,
1927 "unknown facility name \"%s\"",
1932 f->f_pmask[i >> 3] = pri;
1933 f->f_pcmp[i >> 3] = pri_cmp;
1935 while (*p == ',' || *p == ' ')
1942 /* skip to action part */
1943 while (*p == '\t' || *p == ' ')
1958 * scan forward to see if there is a port defined.
1959 * so we can't use strlcpy..
1961 i = sizeof(f->f_un.f_forw.f_hname);
1962 tp = f->f_un.f_forw.f_hname;
1966 * an ipv6 address should start with a '[' in that case
1967 * we should scan for a ']'
1973 while (*p && (*p != endkey) && (i-- > 0)) {
1976 if (endkey == ']' && *p == endkey)
1980 /* See if we copied a domain and have a port */
1986 memset(&hints, 0, sizeof(hints));
1987 hints.ai_family = family;
1988 hints.ai_socktype = SOCK_DGRAM;
1989 error = getaddrinfo(f->f_un.f_forw.f_hname,
1990 p ? p : "syslog", &hints, &res);
1992 logerror(gai_strerror(error));
1995 f->f_un.f_forw.f_addr = res;
2000 if ((f->f_file = open(p, logflags, 0600)) < 0) {
2001 f->f_type = F_UNUSED;
2006 f->f_flags |= FFLAG_SYNC;
2007 if (isatty(f->f_file)) {
2008 if (strcmp(p, ctty) == 0)
2009 f->f_type = F_CONSOLE;
2012 (void)strlcpy(f->f_un.f_fname, p + sizeof(_PATH_DEV) - 1,
2013 sizeof(f->f_un.f_fname));
2015 (void)strlcpy(f->f_un.f_fname, p, sizeof(f->f_un.f_fname));
2021 f->f_un.f_pipe.f_pid = 0;
2022 (void)strlcpy(f->f_un.f_pipe.f_pname, p + 1,
2023 sizeof(f->f_un.f_pipe.f_pname));
2032 for (i = 0; i < MAXUNAMES && *p; i++) {
2033 for (q = p; *q && *q != ','; )
2035 (void)strncpy(f->f_un.f_uname[i], p, MAXLOGNAME - 1);
2036 if ((q - p) >= MAXLOGNAME)
2037 f->f_un.f_uname[i][MAXLOGNAME - 1] = '\0';
2039 f->f_un.f_uname[i][q - p] = '\0';
2040 while (*q == ',' || *q == ' ')
2044 f->f_type = F_USERS;
2051 * Decode a symbolic name to a numeric value
2054 decode(const char *name, const CODE *codetab)
2060 return (atoi(name));
2062 for (p = buf; *name && p < &buf[sizeof(buf) - 1]; p++, name++) {
2064 *p = tolower(*name);
2069 for (c = codetab; c->c_name; c++)
2070 if (!strcmp(buf, c->c_name))
2082 now = time((time_t *)NULL);
2083 MarkSeq += TIMERINTVL;
2084 if (MarkSeq >= MarkInterval) {
2085 logmsg(LOG_INFO, "-- MARK --",
2086 LocalHostName, ADDDATE|MARK);
2090 for (f = Files; f; f = f->f_next) {
2091 if (f->f_prevcount && now >= REPEATTIME(f)) {
2092 dprintf("flush %s: repeated %d times, %d sec.\n",
2093 TypeNames[f->f_type], f->f_prevcount,
2094 repeatinterval[f->f_repeatcount]);
2095 fprintlog(f, 0, (char *)NULL);
2100 /* Walk the dead queue, and see if we should signal somebody. */
2101 for (q = TAILQ_FIRST(&deadq_head); q != NULL; q = next) {
2102 next = TAILQ_NEXT(q, dq_entries);
2104 switch (q->dq_timeout) {
2106 /* Already signalled once, try harder now. */
2107 if (kill(q->dq_pid, SIGKILL) != 0)
2108 (void)deadq_remove(q->dq_pid);
2113 * Timed out on dead queue, send terminate
2114 * signal. Note that we leave the removal
2115 * from the dead queue to reapchild(), which
2116 * will also log the event (unless the process
2117 * didn't even really exist, in case we simply
2118 * drop it from the dead queue).
2120 if (kill(q->dq_pid, SIGTERM) != 0)
2121 (void)deadq_remove(q->dq_pid);
2129 (void)alarm(TIMERINTVL);
2133 * fork off and become a daemon, but wait for the child to come online
2134 * before returning to the parent, or we get disk thrashing at boot etc.
2135 * Set a timer so we don't hang forever if it wedges.
2138 waitdaemon(int nochdir, int noclose, int maxwait)
2142 pid_t pid, childpid;
2144 switch (childpid = fork()) {
2150 signal(SIGALRM, timedout);
2152 while ((pid = wait3(&status, 0, NULL)) != -1) {
2153 if (WIFEXITED(status))
2154 errx(1, "child pid %d exited with return code %d",
2155 pid, WEXITSTATUS(status));
2156 if (WIFSIGNALED(status))
2157 errx(1, "child pid %d exited on signal %d%s",
2158 pid, WTERMSIG(status),
2159 WCOREDUMP(status) ? " (core dumped)" :
2161 if (pid == childpid) /* it's gone... */
2173 if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
2174 (void)dup2(fd, STDIN_FILENO);
2175 (void)dup2(fd, STDOUT_FILENO);
2176 (void)dup2(fd, STDERR_FILENO);
2184 * We get a SIGALRM from the child when it's running and finished doing it's
2185 * fsync()'s or O_SYNC writes for all the boot messages.
2187 * We also get a signal from the kernel if the timer expires, so check to
2188 * see what happened.
2191 timedout(int sig __unused)
2195 signal(SIGALRM, SIG_DFL);
2197 errx(1, "timed out waiting for child");
2203 * Add `s' to the list of allowable peer addresses to accept messages
2206 * `s' is a string in the form:
2208 * [*]domainname[:{servicename|portnumber|*}]
2212 * netaddr/maskbits[:{servicename|portnumber|*}]
2214 * Returns -1 on error, 0 if the argument was valid.
2220 struct allowedpeer ap;
2223 struct addrinfo hints, *res;
2224 struct in_addr *addrp, *maskp;
2227 u_int32_t *addr6p, *mask6p;
2229 char ip[NI_MAXHOST];
2232 if (*s != '[' || (cp1 = strchr(s + 1, ']')) == NULL)
2235 if ((cp1 = strrchr(cp1, ':'))) {
2236 /* service/port provided */
2238 if (strlen(cp1) == 1 && *cp1 == '*')
2239 /* any port allowed */
2241 else if ((se = getservbyname(cp1, "udp"))) {
2242 ap.port = ntohs(se->s_port);
2244 ap.port = strtol(cp1, &cp2, 0);
2246 return (-1); /* port not numeric */
2249 if ((se = getservbyname("syslog", "udp")))
2250 ap.port = ntohs(se->s_port);
2252 /* sanity, should not happen */
2256 if ((cp1 = strchr(s, '/')) != NULL &&
2257 strspn(cp1 + 1, "0123456789") == strlen(cp1 + 1)) {
2259 if ((masklen = atoi(cp1 + 1)) < 0)
2264 cp2 = s + strlen(s) - 1;
2275 memset(&hints, 0, sizeof(hints));
2276 hints.ai_family = PF_UNSPEC;
2277 hints.ai_socktype = SOCK_DGRAM;
2278 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
2279 if (getaddrinfo(s, NULL, &hints, &res) == 0) {
2281 memcpy(&ap.a_addr, res->ai_addr, res->ai_addrlen);
2282 memset(&ap.a_mask, 0, sizeof(ap.a_mask));
2283 ap.a_mask.ss_family = res->ai_family;
2284 if (res->ai_family == AF_INET) {
2285 ap.a_mask.ss_len = sizeof(struct sockaddr_in);
2286 maskp = &((struct sockaddr_in *)&ap.a_mask)->sin_addr;
2287 addrp = &((struct sockaddr_in *)&ap.a_addr)->sin_addr;
2289 /* use default netmask */
2290 if (IN_CLASSA(ntohl(addrp->s_addr)))
2291 maskp->s_addr = htonl(IN_CLASSA_NET);
2292 else if (IN_CLASSB(ntohl(addrp->s_addr)))
2293 maskp->s_addr = htonl(IN_CLASSB_NET);
2295 maskp->s_addr = htonl(IN_CLASSC_NET);
2296 } else if (masklen <= 32) {
2297 /* convert masklen to netmask */
2301 maskp->s_addr = htonl(~((1 << (32 - masklen)) - 1));
2306 /* Lose any host bits in the network number. */
2307 addrp->s_addr &= maskp->s_addr;
2310 else if (res->ai_family == AF_INET6 && masklen <= 128) {
2311 ap.a_mask.ss_len = sizeof(struct sockaddr_in6);
2314 mask6p = (u_int32_t *)&((struct sockaddr_in6 *)&ap.a_mask)->sin6_addr;
2315 /* convert masklen to netmask */
2316 while (masklen > 0) {
2318 *mask6p = htonl(~(0xffffffff >> masklen));
2321 *mask6p++ = 0xffffffff;
2324 /* Lose any host bits in the network number. */
2325 mask6p = (u_int32_t *)&((struct sockaddr_in6 *)&ap.a_mask)->sin6_addr;
2326 addr6p = (u_int32_t *)&((struct sockaddr_in6 *)&ap.a_addr)->sin6_addr;
2327 for (i = 0; i < 4; i++)
2328 addr6p[i] &= mask6p[i];
2337 /* arg `s' is domain name */
2351 printf("allowaddr: rule %d: ", NumAllowed);
2353 printf("numeric, ");
2354 getnameinfo((struct sockaddr *)&ap.a_addr,
2355 ((struct sockaddr *)&ap.a_addr)->sa_len,
2356 ip, sizeof ip, NULL, 0, NI_NUMERICHOST);
2357 printf("addr = %s, ", ip);
2358 getnameinfo((struct sockaddr *)&ap.a_mask,
2359 ((struct sockaddr *)&ap.a_mask)->sa_len,
2360 ip, sizeof ip, NULL, 0, NI_NUMERICHOST);
2361 printf("mask = %s; ", ip);
2363 printf("domainname = %s; ", ap.a_name);
2365 printf("port = %d\n", ap.port);
2368 if ((AllowedPeers = realloc(AllowedPeers,
2369 ++NumAllowed * sizeof(struct allowedpeer)))
2371 logerror("realloc");
2374 memcpy(&AllowedPeers[NumAllowed - 1], &ap, sizeof(struct allowedpeer));
2379 * Validate that the remote peer has permission to log to us.
2382 validate(struct sockaddr *sa, const char *hname)
2386 char *cp, name[NI_MAXHOST], ip[NI_MAXHOST], port[NI_MAXSERV];
2387 struct allowedpeer *ap;
2388 struct sockaddr_in *sin4, *a4p = NULL, *m4p = NULL;
2391 struct sockaddr_in6 *sin6, *a6p = NULL, *m6p = NULL;
2393 struct addrinfo hints, *res;
2396 if (NumAllowed == 0)
2397 /* traditional behaviour, allow everything */
2400 (void)strlcpy(name, hname, sizeof(name));
2401 memset(&hints, 0, sizeof(hints));
2402 hints.ai_family = PF_UNSPEC;
2403 hints.ai_socktype = SOCK_DGRAM;
2404 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
2405 if (getaddrinfo(name, NULL, &hints, &res) == 0)
2407 else if (strchr(name, '.') == NULL) {
2408 strlcat(name, ".", sizeof name);
2409 strlcat(name, LocalDomain, sizeof name);
2411 if (getnameinfo(sa, sa->sa_len, ip, sizeof ip, port, sizeof port,
2412 NI_NUMERICHOST | NI_NUMERICSERV) != 0)
2413 return (0); /* for safety, should not occur */
2414 dprintf("validate: dgram from IP %s, port %s, name %s;\n",
2418 /* now, walk down the list */
2419 for (i = 0, ap = AllowedPeers; i < NumAllowed; i++, ap++) {
2420 if (ap->port != 0 && ap->port != sport) {
2421 dprintf("rejected in rule %d due to port mismatch.\n", i);
2425 if (ap->isnumeric) {
2426 if (ap->a_addr.ss_family != sa->sa_family) {
2427 dprintf("rejected in rule %d due to address family mismatch.\n", i);
2430 if (ap->a_addr.ss_family == AF_INET) {
2431 sin4 = (struct sockaddr_in *)sa;
2432 a4p = (struct sockaddr_in *)&ap->a_addr;
2433 m4p = (struct sockaddr_in *)&ap->a_mask;
2434 if ((sin4->sin_addr.s_addr & m4p->sin_addr.s_addr)
2435 != a4p->sin_addr.s_addr) {
2436 dprintf("rejected in rule %d due to IP mismatch.\n", i);
2441 else if (ap->a_addr.ss_family == AF_INET6) {
2442 sin6 = (struct sockaddr_in6 *)sa;
2443 a6p = (struct sockaddr_in6 *)&ap->a_addr;
2444 m6p = (struct sockaddr_in6 *)&ap->a_mask;
2445 if (a6p->sin6_scope_id != 0 &&
2446 sin6->sin6_scope_id != a6p->sin6_scope_id) {
2447 dprintf("rejected in rule %d due to scope mismatch.\n", i);
2451 for (j = 0; j < 16; j += 4) {
2452 if ((*(u_int32_t *)&sin6->sin6_addr.s6_addr[j] & *(u_int32_t *)&m6p->sin6_addr.s6_addr[j])
2453 != *(u_int32_t *)&a6p->sin6_addr.s6_addr[j]) {
2459 dprintf("rejected in rule %d due to IP mismatch.\n", i);
2470 /* allow wildmatch */
2473 if (l2 > l1 || memcmp(cp, &name[l1 - l2], l2) != 0) {
2474 dprintf("rejected in rule %d due to name mismatch.\n", i);
2480 if (l2 != l1 || memcmp(cp, name, l1) != 0) {
2481 dprintf("rejected in rule %d due to name mismatch.\n", i);
2486 dprintf("accepted in rule %d.\n", i);
2487 return (1); /* hooray! */
2493 * Fairly similar to popen(3), but returns an open descriptor, as
2494 * opposed to a FILE *.
2497 p_open(const char *prog, pid_t *rpid)
2499 int pfd[2], nulldesc;
2501 sigset_t omask, mask;
2502 char *argv[4]; /* sh -c cmd NULL */
2505 if (pipe(pfd) == -1)
2507 if ((nulldesc = open(_PATH_DEVNULL, O_RDWR)) == -1)
2508 /* we are royally screwed anyway */
2512 sigaddset(&mask, SIGALRM);
2513 sigaddset(&mask, SIGHUP);
2514 sigprocmask(SIG_BLOCK, &mask, &omask);
2515 switch ((pid = fork())) {
2517 sigprocmask(SIG_SETMASK, &omask, 0);
2522 argv[0] = strdup("sh");
2523 argv[1] = strdup("-c");
2524 argv[2] = strdup(prog);
2526 if (argv[0] == NULL || argv[1] == NULL || argv[2] == NULL) {
2532 (void)setsid(); /* Avoid catching SIGHUPs. */
2535 * Throw away pending signals, and reset signal
2536 * behaviour to standard values.
2538 signal(SIGALRM, SIG_IGN);
2539 signal(SIGHUP, SIG_IGN);
2540 sigprocmask(SIG_SETMASK, &omask, 0);
2541 signal(SIGPIPE, SIG_DFL);
2542 signal(SIGQUIT, SIG_DFL);
2543 signal(SIGALRM, SIG_DFL);
2544 signal(SIGHUP, SIG_DFL);
2546 dup2(pfd[0], STDIN_FILENO);
2547 dup2(nulldesc, STDOUT_FILENO);
2548 dup2(nulldesc, STDERR_FILENO);
2551 (void)execvp(_PATH_BSHELL, argv);
2555 sigprocmask(SIG_SETMASK, &omask, 0);
2559 * Avoid blocking on a hung pipe. With O_NONBLOCK, we are
2560 * supposed to get an EWOULDBLOCK on writev(2), which is
2561 * caught by the logic above anyway, which will in turn close
2562 * the pipe, and fork a new logging subprocess if necessary.
2563 * The stale subprocess will be killed some time later unless
2564 * it terminated itself due to closing its input pipe (so we
2565 * get rid of really dead puppies).
2567 if (fcntl(pfd[1], F_SETFL, O_NONBLOCK) == -1) {
2569 (void)snprintf(errmsg, sizeof errmsg,
2570 "Warning: cannot change pipe to PID %d to "
2571 "non-blocking behaviour.",
2580 deadq_enter(pid_t pid, const char *name)
2586 * Be paranoid, if we can't signal the process, don't enter it
2587 * into the dead queue (perhaps it's already dead). If possible,
2588 * we try to fetch and log the child's status.
2590 if (kill(pid, 0) != 0) {
2591 if (waitpid(pid, &status, WNOHANG) > 0)
2592 log_deadchild(pid, status, name);
2596 p = malloc(sizeof(struct deadq_entry));
2603 p->dq_timeout = DQ_TIMO_INIT;
2604 TAILQ_INSERT_TAIL(&deadq_head, p, dq_entries);
2608 deadq_remove(pid_t pid)
2612 TAILQ_FOREACH(q, &deadq_head, dq_entries) {
2613 if (q->dq_pid == pid) {
2614 TAILQ_REMOVE(&deadq_head, q, dq_entries);
2624 log_deadchild(pid_t pid, int status, const char *name)
2630 errno = 0; /* Keep strerror() stuff out of logerror messages. */
2631 if (WIFSIGNALED(status)) {
2632 reason = "due to signal";
2633 code = WTERMSIG(status);
2635 reason = "with status";
2636 code = WEXITSTATUS(status);
2640 (void)snprintf(buf, sizeof buf,
2641 "Logging subprocess %d (%s) exited %s %d.",
2642 pid, name, reason, code);
2647 socksetup(int af, char *bindhostname)
2649 struct addrinfo hints, *res, *r;
2650 const char *bindservice;
2652 int error, maxs, *s, *socks;
2655 * We have to handle this case for backwards compatibility:
2656 * If there are two (or more) colons but no '[' and ']',
2657 * assume this is an inet6 address without a service.
2659 bindservice = "syslog";
2660 if (bindhostname != NULL) {
2662 if (*bindhostname == '[' &&
2663 (cp = strchr(bindhostname + 1, ']')) != NULL) {
2666 if (cp[1] == ':' && cp[2] != '\0')
2667 bindservice = cp + 2;
2670 cp = strchr(bindhostname, ':');
2671 if (cp != NULL && strchr(cp + 1, ':') == NULL) {
2674 bindservice = cp + 1;
2675 if (cp == bindhostname)
2676 bindhostname = NULL;
2683 memset(&hints, 0, sizeof(hints));
2684 hints.ai_flags = AI_PASSIVE;
2685 hints.ai_family = af;
2686 hints.ai_socktype = SOCK_DGRAM;
2687 error = getaddrinfo(bindhostname, bindservice, &hints, &res);
2689 logerror(gai_strerror(error));
2694 /* Count max number of sockets we may open */
2695 for (maxs = 0, r = res; r; r = r->ai_next, maxs++);
2696 socks = malloc((maxs+1) * sizeof(int));
2697 if (socks == NULL) {
2698 logerror("couldn't allocate memory for sockets");
2702 *socks = 0; /* num of sockets counter at start of array */
2704 for (r = res; r; r = r->ai_next) {
2706 *s = socket(r->ai_family, r->ai_socktype, r->ai_protocol);
2712 if (r->ai_family == AF_INET6) {
2713 if (setsockopt(*s, IPPROTO_IPV6, IPV6_V6ONLY,
2714 (char *)&on, sizeof (on)) < 0) {
2715 logerror("setsockopt");
2721 if (setsockopt(*s, SOL_SOCKET, SO_REUSEADDR,
2722 (char *)&on, sizeof (on)) < 0) {
2723 logerror("setsockopt");
2728 * RFC 3164 recommends that client side message
2729 * should come from the privileged syslogd port.
2731 * If the system administrator choose not to obey
2732 * this, we can skip the bind() step so that the
2733 * system will choose a port for us.
2736 if (bind(*s, r->ai_addr, r->ai_addrlen) < 0) {
2743 increase_rcvbuf(*s);
2764 increase_rcvbuf(int fd)
2766 socklen_t len, slen;
2770 if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &len, &slen) == 0) {
2771 if (len < RCVBUF_MINSIZE) {
2772 len = RCVBUF_MINSIZE;
2773 setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &len, sizeof(len));