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 */
78 #include <sys/param.h>
79 #include <sys/ioctl.h>
83 #include <sys/socket.h>
84 #include <sys/queue.h>
88 #include <sys/resource.h>
89 #include <sys/syslimits.h>
90 #include <sys/types.h>
92 #include <netinet/in.h>
94 #include <arpa/inet.h>
107 #include <sysexits.h>
111 #include "pathnames.h"
115 #include <sys/syslog.h>
117 const char *ConfFile = _PATH_LOGCONF;
118 const char *PidFile = _PATH_LOGPID;
119 const char ctty[] = _PATH_CONSOLE;
121 #define dprintf if (Debug) printf
123 #define MAXUNAMES 20 /* maximum number of user names */
127 * We have two default sockets, one with 666 permissions,
128 * and one for privileged programs.
134 STAILQ_ENTRY(funix) next;
136 struct funix funix_secure = { -1, _PATH_LOG_PRIV, S_IRUSR | S_IWUSR,
138 struct funix funix_default = { -1, _PATH_LOG, DEFFILEMODE,
141 STAILQ_HEAD(, funix) funixes = { &funix_default,
142 &(funix_secure.next.stqe_next) };
148 #define IGN_CONS 0x001 /* don't print on console */
149 #define SYNC_FILE 0x002 /* do fsync on file after printing */
150 #define ADDDATE 0x004 /* add a date to the message */
151 #define MARK 0x008 /* this message is a mark */
152 #define ISKERNEL 0x010 /* kernel generated message */
155 * This structure represents the files that will have log
157 * We require f_file to be valid if f_type is F_FILE, F_CONSOLE, F_TTY
158 * or if f_type if F_PIPE and f_pid > 0.
162 struct filed *f_next; /* next in linked list */
163 short f_type; /* entry type, see below */
164 short f_file; /* file descriptor */
165 time_t f_time; /* time this was last written */
166 char *f_host; /* host from which to recd. */
167 u_char f_pmask[LOG_NFACILITIES+1]; /* priority mask */
168 u_char f_pcmp[LOG_NFACILITIES+1]; /* compare priority */
172 char *f_program; /* program this applies to */
174 char f_uname[MAXUNAMES][MAXLOGNAME];
176 char f_hname[MAXHOSTNAMELEN];
177 struct addrinfo *f_addr;
179 } f_forw; /* forwarding address */
180 char f_fname[MAXPATHLEN];
182 char f_pname[MAXPATHLEN];
186 char f_prevline[MAXSVLINE]; /* last message logged */
187 char f_lasttime[16]; /* time of last occurrence */
188 char f_prevhost[MAXHOSTNAMELEN]; /* host from which recd. */
189 int f_prevpri; /* pri of f_prevline */
190 int f_prevlen; /* length of f_prevline */
191 int f_prevcount; /* repetition cnt of prevline */
192 u_int f_repeatcount; /* number of "repeated" msgs */
193 int f_flags; /* file-specific flags */
194 #define FFLAG_SYNC 0x01
195 #define FFLAG_NEEDSYNC 0x02
199 * Queue of about-to-be dead processes we should watch out for.
202 TAILQ_HEAD(stailhead, deadq_entry) deadq_head;
203 struct stailhead *deadq_headp;
208 TAILQ_ENTRY(deadq_entry) dq_entries;
212 * The timeout to apply to processes waiting on the dead queue. Unit
213 * of measure is `mark intervals', i.e. 20 minutes by default.
214 * Processes on the dead queue will be terminated after that time.
217 #define DQ_TIMO_INIT 2
219 typedef struct deadq_entry *dq_t;
223 * Struct to hold records of network addresses that are allowed to log
231 struct sockaddr_storage addr;
232 struct sockaddr_storage mask;
236 #define a_addr u.numeric.addr
237 #define a_mask u.numeric.mask
238 #define a_name u.name
243 * Intervals at which we flush out "message repeated" messages,
244 * in seconds after previous message is logged. After each flush,
245 * we move to the next interval until we reach the largest.
247 int repeatinterval[] = { 30, 120, 600 }; /* # of secs before flush */
248 #define MAXREPEAT ((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1)
249 #define REPEATTIME(f) ((f)->f_time + repeatinterval[(f)->f_repeatcount])
250 #define BACKOFF(f) { if (++(f)->f_repeatcount > MAXREPEAT) \
251 (f)->f_repeatcount = MAXREPEAT; \
254 /* values for f_type */
255 #define F_UNUSED 0 /* unused entry */
256 #define F_FILE 1 /* regular file */
257 #define F_TTY 2 /* terminal */
258 #define F_CONSOLE 3 /* console terminal */
259 #define F_FORW 4 /* remote machine */
260 #define F_USERS 5 /* list of users */
261 #define F_WALL 6 /* everyone logged on */
262 #define F_PIPE 7 /* pipe to program */
264 const char *TypeNames[8] = {
265 "UNUSED", "FILE", "TTY", "CONSOLE",
266 "FORW", "USERS", "WALL", "PIPE"
269 static struct filed *Files; /* Log files that we write to */
270 static struct filed consfile; /* Console */
272 static int Debug; /* debug flag */
273 static int resolve = 1; /* resolve hostname */
274 static char LocalHostName[MAXHOSTNAMELEN]; /* our hostname */
275 static const char *LocalDomain; /* our local domain name */
276 static int *finet; /* Internet datagram socket */
277 static int fklog = -1; /* /dev/klog */
278 static int Initialized; /* set when we have initialized ourselves */
279 static int MarkInterval = 20 * 60; /* interval between marks in seconds */
280 static int MarkSeq; /* mark sequence number */
281 static int NoBind; /* don't bind() as suggested by RFC 3164 */
282 static int SecureMode; /* when true, receive only unix domain socks */
284 static int family = PF_UNSPEC; /* protocol family (IPv4, IPv6 or both) */
286 static int family = PF_INET; /* protocol family (IPv4 only) */
288 static int mask_C1 = 1; /* mask characters from 0x80 - 0x9F */
289 static int send_to_all; /* send message to all IPv4/IPv6 addresses */
290 static int use_bootfile; /* log entire bootfile for every kern msg */
291 static int no_compress; /* don't compress messages (1=pipes, 2=all) */
292 static int logflags = O_WRONLY|O_APPEND; /* flags used to open log files */
294 static char bootfile[MAXLINE+1]; /* booted kernel file */
296 struct allowedpeer *AllowedPeers; /* List of allowed peers */
297 static int NumAllowed; /* Number of entries in AllowedPeers */
298 static int RemoteAddDate; /* Always set the date on remote messages */
300 static int UniquePriority; /* Only log specified priority? */
301 static int LogFacPri; /* Put facility and priority in log message: */
302 /* 0=no, 1=numeric, 2=names */
303 static int KeepKernFac; /* Keep remotely logged kernel facility */
304 static int needdofsync = 0; /* Are any file(s) waiting to be fsynced? */
305 static struct pidfh *pfh;
307 volatile sig_atomic_t MarkSet, WantDie;
309 static int allowaddr(char *);
310 static void cfline(const char *, struct filed *,
311 const char *, const char *);
312 static const char *cvthname(struct sockaddr *);
313 static void deadq_enter(pid_t, const char *);
314 static int deadq_remove(pid_t);
315 static int decode(const char *, CODE *);
316 static void die(int);
317 static void dodie(int);
318 static void dofsync(void);
319 static void domark(int);
320 static void fprintlog(struct filed *, int, const char *);
321 static int *socksetup(int, char *);
322 static void init(int);
323 static void logerror(const char *);
324 static void logmsg(int, const char *, const char *, int);
325 static void log_deadchild(pid_t, int, const char *);
326 static void markit(void);
327 static int skip_message(const char *, const char *, int);
328 static void printline(const char *, char *, int);
329 static void printsys(char *);
330 static int p_open(const char *, pid_t *);
331 static void readklog(void);
332 static void reapchild(int);
333 static void usage(void);
334 static int validate(struct sockaddr *, const char *);
335 static void unmapped(struct sockaddr *);
336 static void wallmsg(struct filed *, struct iovec *, const int iovlen);
337 static int waitdaemon(int, int, int);
338 static void timedout(int);
339 static void double_rbuf(int);
342 main(int argc, char *argv[])
344 int ch, i, fdsrmax = 0, l;
345 struct sockaddr_un sunx, fromunix;
346 struct sockaddr_storage frominet;
348 char line[MAXLINE + 1];
351 struct timeval tv, *tvp;
352 struct sigaction sact;
353 struct funix *fx, *fx1;
355 pid_t ppid = 1, spid;
358 if (madvise(NULL, 0, MADV_PROTECT) != 0)
359 dprintf("madvise() failed: %s\n", strerror(errno));
362 while ((ch = getopt(argc, argv, "468Aa:b:cCdf:kl:m:nNop:P:sS:Tuv"))
379 case 'a': /* allow specific network addresses only */
380 if (allowaddr(optarg) == -1)
384 bindhostname = optarg;
392 case 'd': /* debug */
395 case 'f': /* configuration file */
398 case 'k': /* keep remote kern fac */
407 if (optarg[0] == '/') {
410 } else if ((name = strchr(optarg, ':')) != NULL) {
413 errx(1, "socket name must be absolute "
415 if (isdigit(*optarg)) {
416 perml = strtol(optarg, &ep, 8);
417 if (*ep || perml < 0 ||
418 perml & ~(S_IRWXU|S_IRWXG|S_IRWXO))
419 errx(1, "invalid mode %s, exiting",
421 mode = (mode_t )perml;
423 errx(1, "invalid mode %s, exiting",
425 } else /* doesn't begin with '/', and no ':' */
426 errx(1, "can't parse path %s", optarg);
428 if (strlen(name) >= sizeof(sunx.sun_path))
429 errx(1, "%s path too long, exiting", name);
430 if ((fx = malloc(sizeof(struct funix))) == NULL)
431 errx(1, "malloc failed");
435 STAILQ_INSERT_TAIL(&funixes, fx, next);
438 case 'm': /* mark interval */
439 MarkInterval = atoi(optarg) * 60;
452 if (strlen(optarg) >= sizeof(sunx.sun_path))
453 errx(1, "%s path too long, exiting", optarg);
454 funix_default.name = optarg;
456 case 'P': /* path for alt. PID */
459 case 's': /* no network mode */
462 case 'S': /* path for privileged originator */
463 if (strlen(optarg) >= sizeof(sunx.sun_path))
464 errx(1, "%s path too long, exiting", optarg);
465 funix_secure.name = optarg;
470 case 'u': /* only log specified priority */
473 case 'v': /* log facility and priority */
479 if ((argc -= optind) != 0)
482 pfh = pidfile_open(PidFile, 0600, &spid);
485 errx(1, "syslogd already running, pid: %d", spid);
486 warn("cannot open pid file");
490 ppid = waitdaemon(0, 0, 30);
492 warn("could not become daemon");
503 consfile.f_type = F_CONSOLE;
504 (void)strlcpy(consfile.f_un.f_fname, ctty + sizeof _PATH_DEV - 1,
505 sizeof(consfile.f_un.f_fname));
506 (void)strlcpy(bootfile, getbootfile(), sizeof(bootfile));
507 (void)signal(SIGTERM, dodie);
508 (void)signal(SIGINT, Debug ? dodie : SIG_IGN);
509 (void)signal(SIGQUIT, Debug ? dodie : SIG_IGN);
511 * We don't want the SIGCHLD and SIGHUP handlers to interfere
512 * with each other; they are likely candidates for being called
513 * simultaneously (SIGHUP closes pipe descriptor, process dies,
517 sigaddset(&mask, SIGHUP);
518 sact.sa_handler = reapchild;
520 sact.sa_flags = SA_RESTART;
521 (void)sigaction(SIGCHLD, &sact, NULL);
522 (void)signal(SIGALRM, domark);
523 (void)signal(SIGPIPE, SIG_IGN); /* We'll catch EPIPE instead. */
524 (void)alarm(TIMERINTVL);
526 TAILQ_INIT(&deadq_head);
529 #define SUN_LEN(unp) (strlen((unp)->sun_path) + 2)
531 STAILQ_FOREACH_SAFE(fx, &funixes, next, fx1) {
532 (void)unlink(fx->name);
533 memset(&sunx, 0, sizeof(sunx));
534 sunx.sun_family = AF_LOCAL;
535 (void)strlcpy(sunx.sun_path, fx->name, sizeof(sunx.sun_path));
536 fx->s = socket(PF_LOCAL, SOCK_DGRAM, 0);
538 bind(fx->s, (struct sockaddr *)&sunx, SUN_LEN(&sunx)) < 0 ||
539 chmod(fx->name, fx->mode) < 0) {
540 (void)snprintf(line, sizeof line,
541 "cannot create %s", fx->name);
543 dprintf("cannot create %s (%d)\n", fx->name, errno);
544 if (fx == &funix_default || fx == &funix_secure)
547 STAILQ_REMOVE(&funixes, fx, funix, next);
554 finet = socksetup(family, bindhostname);
558 for (i = 0; i < *finet; i++) {
559 if (shutdown(finet[i+1], SHUT_RD) < 0 &&
561 logerror("shutdown");
567 dprintf("listening on inet and/or inet6 socket\n");
569 dprintf("sending on inet and/or inet6 socket\n");
572 if ((fklog = open(_PATH_KLOG, O_RDONLY, 0)) >= 0)
573 if (fcntl(fklog, F_SETFL, O_NONBLOCK) < 0)
576 dprintf("can't open %s (%d)\n", _PATH_KLOG, errno);
578 /* tuck my process id away */
581 dprintf("off & running....\n");
584 /* prevent SIGHUP and SIGCHLD handlers from running in parallel */
586 sigaddset(&mask, SIGCHLD);
587 sact.sa_handler = init;
589 sact.sa_flags = SA_RESTART;
590 (void)sigaction(SIGHUP, &sact, NULL);
593 tv.tv_sec = tv.tv_usec = 0;
595 if (fklog != -1 && fklog > fdsrmax)
597 if (finet && !SecureMode) {
598 for (i = 0; i < *finet; i++) {
599 if (finet[i+1] != -1 && finet[i+1] > fdsrmax)
600 fdsrmax = finet[i+1];
603 STAILQ_FOREACH(fx, &funixes, next)
607 fdsr = (fd_set *)calloc(howmany(fdsrmax+1, NFDBITS),
610 errx(1, "calloc fd_set");
618 bzero(fdsr, howmany(fdsrmax+1, NFDBITS) *
623 if (finet && !SecureMode) {
624 for (i = 0; i < *finet; i++) {
625 if (finet[i+1] != -1)
626 FD_SET(finet[i+1], fdsr);
629 STAILQ_FOREACH(fx, &funixes, next)
632 i = select(fdsrmax+1, fdsr, NULL, NULL,
633 needdofsync ? &tv : tvp);
649 if (fklog != -1 && FD_ISSET(fklog, fdsr))
651 if (finet && !SecureMode) {
652 for (i = 0; i < *finet; i++) {
653 if (FD_ISSET(finet[i+1], fdsr)) {
654 len = sizeof(frominet);
655 l = recvfrom(finet[i+1], line, MAXLINE,
656 0, (struct sockaddr *)&frominet,
660 hname = cvthname((struct sockaddr *)&frominet);
661 unmapped((struct sockaddr *)&frominet);
662 if (validate((struct sockaddr *)&frominet, hname))
663 printline(hname, line, RemoteAddDate ? ADDDATE : 0);
664 } else if (l < 0 && errno != EINTR)
665 logerror("recvfrom inet");
669 STAILQ_FOREACH(fx, &funixes, next) {
670 if (FD_ISSET(fx->s, fdsr)) {
671 len = sizeof(fromunix);
672 l = recvfrom(fx->s, line, MAXLINE, 0,
673 (struct sockaddr *)&fromunix, &len);
676 printline(LocalHostName, line, 0);
677 } else if (l < 0 && errno != EINTR)
678 logerror("recvfrom unix");
687 unmapped(struct sockaddr *sa)
689 struct sockaddr_in6 *sin6;
690 struct sockaddr_in sin4;
692 if (sa->sa_family != AF_INET6)
694 if (sa->sa_len != sizeof(struct sockaddr_in6) ||
695 sizeof(sin4) > sa->sa_len)
697 sin6 = (struct sockaddr_in6 *)sa;
698 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
701 memset(&sin4, 0, sizeof(sin4));
702 sin4.sin_family = AF_INET;
703 sin4.sin_len = sizeof(struct sockaddr_in);
704 memcpy(&sin4.sin_addr, &sin6->sin6_addr.s6_addr[12],
705 sizeof(sin4.sin_addr));
706 sin4.sin_port = sin6->sin6_port;
708 memcpy(sa, &sin4, sin4.sin_len);
715 fprintf(stderr, "%s\n%s\n%s\n%s\n",
716 "usage: syslogd [-468ACcdknosTuv] [-a allowed_peer]",
717 " [-b bind_address] [-f config_file]",
718 " [-l [mode:]path] [-m mark_interval]",
719 " [-P pid_file] [-p log_socket]");
724 * Take a raw input line, decode the message, and print the message
725 * on the appropriate log files.
728 printline(const char *hname, char *msg, int flags)
733 char line[MAXLINE + 1];
735 /* test for special codes */
740 n = strtol(p + 1, &q, 10);
741 if (*q == '>' && n >= 0 && n < INT_MAX && errno == 0) {
746 if (pri &~ (LOG_FACMASK|LOG_PRIMASK))
750 * Don't allow users to log kernel messages.
751 * NOTE: since LOG_KERN == 0 this will also match
752 * messages with no facility specified.
754 if ((pri & LOG_FACMASK) == LOG_KERN && !KeepKernFac)
755 pri = LOG_MAKEPRI(LOG_USER, LOG_PRI(pri));
759 while ((c = (unsigned char)*p++) != '\0' &&
760 q < &line[sizeof(line) - 4]) {
761 if (mask_C1 && (c & 0x80) && c < 0xA0) {
766 if (isascii(c) && iscntrl(c)) {
769 } else if (c == '\t') {
781 logmsg(pri, line, hname, flags);
785 * Read /dev/klog while data are available, split into lines.
790 char *p, *q, line[MAXLINE + 1];
795 i = read(fklog, line + len, MAXLINE - 1 - len);
797 line[i + len] = '\0';
799 if (i < 0 && errno != EINTR && errno != EAGAIN) {
806 for (p = line; (q = strchr(p, '\n')) != NULL; p = q + 1) {
811 if (len >= MAXLINE - 1) {
816 memmove(line, p, len + 1);
823 * Take a raw input line from /dev/klog, format similar to syslog().
830 int flags, isprintf, pri;
832 flags = ISKERNEL | SYNC_FILE | ADDDATE; /* fsync after write */
838 n = strtol(p + 1, &q, 10);
839 if (*q == '>' && n >= 0 && n < INT_MAX && errno == 0) {
846 * Kernel printf's and LOG_CONSOLE messages have been displayed
847 * on the console already.
849 if (isprintf || (pri & LOG_FACMASK) == LOG_CONSOLE)
851 if (pri &~ (LOG_FACMASK|LOG_PRIMASK))
853 logmsg(pri, p, LocalHostName, flags);
859 * Match a program or host name against a specification.
860 * Return a non-0 value if the message must be ignored
861 * based on the specification.
864 skip_message(const char *name, const char *spec, int checkcase)
869 /* Behaviour on explicit match */
884 s = strstr (spec, name);
886 s = strcasestr (spec, name);
889 prev = (s == spec ? ',' : *(s - 1));
890 next = *(s + strlen (name));
892 if (prev == ',' && (next == '\0' || next == ','))
893 /* Explicit match: skip iff the spec is an
898 /* No explicit match for this name: skip the message iff
899 the spec is an inclusive one. */
904 * Log a message to the appropriate log files, users, etc. based on
908 logmsg(int pri, const char *msg, const char *from, int flags)
911 int i, fac, msglen, omask, prilev;
912 const char *timestamp;
913 char prog[NAME_MAX+1];
916 dprintf("logmsg: pri %o, flags %x, from %s, msg %s\n",
917 pri, flags, from, msg);
919 omask = sigblock(sigmask(SIGHUP)|sigmask(SIGALRM));
922 * Check to see if msg looks non-standard.
924 msglen = strlen(msg);
925 if (msglen < 16 || msg[3] != ' ' || msg[6] != ' ' ||
926 msg[9] != ':' || msg[12] != ':' || msg[15] != ' ')
930 if (flags & ADDDATE) {
931 timestamp = ctime(&now) + 4;
938 /* skip leading blanks */
939 while (isspace(*msg)) {
944 /* extract facility and priority level */
946 fac = LOG_NFACILITIES;
950 /* Check maximum facility number. */
951 if (fac > LOG_NFACILITIES) {
952 (void)sigsetmask(omask);
956 prilev = LOG_PRI(pri);
958 /* extract program name */
959 for (i = 0; i < NAME_MAX; i++) {
960 if (!isprint(msg[i]) || msg[i] == ':' || msg[i] == '[' ||
961 msg[i] == '/' || isspace(msg[i]))
967 /* add kernel prefix for kernel messages */
968 if (flags & ISKERNEL) {
969 snprintf(buf, sizeof(buf), "%s: %s",
970 use_bootfile ? bootfile : "kernel", msg);
972 msglen = strlen(buf);
975 /* log the message to the particular outputs */
979 * Open in non-blocking mode to avoid hangs during open
980 * and close(waiting for the port to drain).
982 f->f_file = open(ctty, O_WRONLY | O_NONBLOCK, 0);
984 if (f->f_file >= 0) {
985 (void)strlcpy(f->f_lasttime, timestamp,
986 sizeof(f->f_lasttime));
987 fprintlog(f, flags, msg);
988 (void)close(f->f_file);
990 (void)sigsetmask(omask);
993 for (f = Files; f; f = f->f_next) {
994 /* skip messages that are incorrect priority */
995 if (!(((f->f_pcmp[fac] & PRI_EQ) && (f->f_pmask[fac] == prilev))
996 ||((f->f_pcmp[fac] & PRI_LT) && (f->f_pmask[fac] < prilev))
997 ||((f->f_pcmp[fac] & PRI_GT) && (f->f_pmask[fac] > prilev))
999 || f->f_pmask[fac] == INTERNAL_NOPRI)
1002 /* skip messages with the incorrect hostname */
1003 if (skip_message(from, f->f_host, 0))
1006 /* skip messages with the incorrect program name */
1007 if (skip_message(prog, f->f_program, 1))
1010 /* skip message to console if it has already been printed */
1011 if (f->f_type == F_CONSOLE && (flags & IGN_CONS))
1014 /* don't output marks to recently written files */
1015 if ((flags & MARK) && (now - f->f_time) < MarkInterval / 2)
1019 * suppress duplicate lines to this file
1021 if (no_compress - (f->f_type != F_PIPE) < 1 &&
1022 (flags & MARK) == 0 && msglen == f->f_prevlen &&
1023 !strcmp(msg, f->f_prevline) &&
1024 !strcasecmp(from, f->f_prevhost)) {
1025 (void)strlcpy(f->f_lasttime, timestamp,
1026 sizeof(f->f_lasttime));
1028 dprintf("msg repeated %d times, %ld sec of %d\n",
1029 f->f_prevcount, (long)(now - f->f_time),
1030 repeatinterval[f->f_repeatcount]);
1032 * If domark would have logged this by now,
1033 * flush it now (so we don't hold isolated messages),
1034 * but back off so we'll flush less often
1037 if (now > REPEATTIME(f)) {
1038 fprintlog(f, flags, (char *)NULL);
1042 /* new line, save it */
1044 fprintlog(f, 0, (char *)NULL);
1045 f->f_repeatcount = 0;
1047 (void)strlcpy(f->f_lasttime, timestamp,
1048 sizeof(f->f_lasttime));
1049 (void)strlcpy(f->f_prevhost, from,
1050 sizeof(f->f_prevhost));
1051 if (msglen < MAXSVLINE) {
1052 f->f_prevlen = msglen;
1053 (void)strlcpy(f->f_prevline, msg, sizeof(f->f_prevline));
1054 fprintlog(f, flags, (char *)NULL);
1056 f->f_prevline[0] = 0;
1058 fprintlog(f, flags, msg);
1062 (void)sigsetmask(omask);
1070 for (f = Files; f; f = f->f_next) {
1071 if ((f->f_type == F_FILE) &&
1072 (f->f_flags & FFLAG_NEEDSYNC)) {
1073 f->f_flags &= ~FFLAG_NEEDSYNC;
1074 (void)fsync(f->f_file);
1081 fprintlog(struct filed *f, int flags, const char *msg)
1083 struct iovec iov[IOV_SIZE];
1086 int i, l, lsent = 0;
1087 char line[MAXLINE + 1], repbuf[80], greetings[200], *wmsg = NULL;
1088 char nul[] = "", space[] = " ", lf[] = "\n", crlf[] = "\r\n";
1092 if (f->f_type == F_WALL) {
1093 v->iov_base = greetings;
1094 /* The time displayed is not synchornized with the other log
1095 * destinations (like messages). Following fragment was using
1096 * ctime(&now), which was updating the time every 30 sec.
1097 * With f_lasttime, time is synchronized correctly.
1099 v->iov_len = snprintf(greetings, sizeof greetings,
1100 "\r\n\7Message from syslogd@%s at %.24s ...\r\n",
1101 f->f_prevhost, f->f_lasttime);
1102 if (v->iov_len >= sizeof greetings)
1103 v->iov_len = sizeof greetings - 1;
1109 v->iov_base = f->f_lasttime;
1110 v->iov_len = strlen(f->f_lasttime);
1112 v->iov_base = space;
1118 static char fp_buf[30]; /* Hollow laugh */
1119 int fac = f->f_prevpri & LOG_FACMASK;
1120 int pri = LOG_PRI(f->f_prevpri);
1121 const char *f_s = NULL;
1122 char f_n[5]; /* Hollow laugh */
1123 const char *p_s = NULL;
1124 char p_n[5]; /* Hollow laugh */
1126 if (LogFacPri > 1) {
1129 for (c = facilitynames; c->c_name; c++) {
1130 if (c->c_val == fac) {
1135 for (c = prioritynames; c->c_name; c++) {
1136 if (c->c_val == pri) {
1143 snprintf(f_n, sizeof f_n, "%d", LOG_FAC(fac));
1147 snprintf(p_n, sizeof p_n, "%d", pri);
1150 snprintf(fp_buf, sizeof fp_buf, "<%s.%s> ", f_s, p_s);
1151 v->iov_base = fp_buf;
1152 v->iov_len = strlen(fp_buf);
1159 v->iov_base = f->f_prevhost;
1160 v->iov_len = strlen(v->iov_base);
1162 v->iov_base = space;
1167 wmsg = strdup(msg); /* XXX iov_base needs a `const' sibling. */
1173 v->iov_len = strlen(msg);
1174 } else if (f->f_prevcount > 1) {
1175 v->iov_base = repbuf;
1176 v->iov_len = snprintf(repbuf, sizeof repbuf,
1177 "last message repeated %d times", f->f_prevcount);
1179 v->iov_base = f->f_prevline;
1180 v->iov_len = f->f_prevlen;
1184 dprintf("Logging to %s", TypeNames[f->f_type]);
1187 switch (f->f_type) {
1194 port = (int)ntohs(((struct sockaddr_in *)
1195 (f->f_un.f_forw.f_addr->ai_addr))->sin_port);
1197 dprintf(" %s:%d\n", f->f_un.f_forw.f_hname, port);
1199 dprintf(" %s\n", f->f_un.f_forw.f_hname);
1201 /* check for local vs remote messages */
1202 if (strcasecmp(f->f_prevhost, LocalHostName))
1203 l = snprintf(line, sizeof line - 1,
1204 "<%d>%.15s Forwarded from %s: %s",
1205 f->f_prevpri, (char *)iov[0].iov_base,
1206 f->f_prevhost, (char *)iov[5].iov_base);
1208 l = snprintf(line, sizeof line - 1, "<%d>%.15s %s",
1209 f->f_prevpri, (char *)iov[0].iov_base,
1210 (char *)iov[5].iov_base);
1213 else if (l > MAXLINE)
1217 for (r = f->f_un.f_forw.f_addr; r; r = r->ai_next) {
1218 for (i = 0; i < *finet; i++) {
1221 * should we check AF first, or just
1222 * trial and error? FWD
1225 address_family_of(finet[i+1]))
1227 lsent = sendto(finet[i+1], line, l, 0,
1228 r->ai_addr, r->ai_addrlen);
1232 if (lsent == l && !send_to_all)
1235 dprintf("lsent/l: %d/%d\n", lsent, l);
1248 /* case ENOTSOCK: */
1250 /* case EMSGSIZE: */
1253 /* case ECONNREFUSED: */
1255 dprintf("removing entry\n");
1256 f->f_type = F_UNUSED;
1264 dprintf(" %s\n", f->f_un.f_fname);
1267 if (writev(f->f_file, iov, IOV_SIZE) < 0) {
1269 * If writev(2) fails for potentially transient errors
1270 * like the filesystem being full, ignore it.
1271 * Otherwise remove this logfile from the list.
1273 if (errno != ENOSPC) {
1275 (void)close(f->f_file);
1276 f->f_type = F_UNUSED;
1278 logerror(f->f_un.f_fname);
1280 } else if ((flags & SYNC_FILE) && (f->f_flags & FFLAG_SYNC)) {
1281 f->f_flags |= FFLAG_NEEDSYNC;
1287 dprintf(" %s\n", f->f_un.f_pipe.f_pname);
1290 if (f->f_un.f_pipe.f_pid == 0) {
1291 if ((f->f_file = p_open(f->f_un.f_pipe.f_pname,
1292 &f->f_un.f_pipe.f_pid)) < 0) {
1293 f->f_type = F_UNUSED;
1294 logerror(f->f_un.f_pipe.f_pname);
1298 if (writev(f->f_file, iov, IOV_SIZE) < 0) {
1300 (void)close(f->f_file);
1301 if (f->f_un.f_pipe.f_pid > 0)
1302 deadq_enter(f->f_un.f_pipe.f_pid,
1303 f->f_un.f_pipe.f_pname);
1304 f->f_un.f_pipe.f_pid = 0;
1306 logerror(f->f_un.f_pipe.f_pname);
1311 if (flags & IGN_CONS) {
1312 dprintf(" (ignored)\n");
1318 dprintf(" %s%s\n", _PATH_DEV, f->f_un.f_fname);
1322 errno = 0; /* ttymsg() only sometimes returns an errno */
1323 if ((msgret = ttymsg(iov, IOV_SIZE, f->f_un.f_fname, 10))) {
1324 f->f_type = F_UNUSED;
1334 wallmsg(f, iov, IOV_SIZE);
1342 * WALLMSG -- Write a message to the world at large
1344 * Write the specified message to either the entire
1345 * world, or a list of approved users.
1348 wallmsg(struct filed *f, struct iovec *iov, const int iovlen)
1350 static int reenter; /* avoid calling ourselves */
1359 while ((ut = getutxent()) != NULL) {
1360 if (ut->ut_type != USER_PROCESS)
1362 if (f->f_type == F_WALL) {
1363 if ((p = ttymsg(iov, iovlen, ut->ut_line,
1364 TTYMSGTIME)) != NULL) {
1365 errno = 0; /* already in msg */
1370 /* should we send the message to this user? */
1371 for (i = 0; i < MAXUNAMES; i++) {
1372 if (!f->f_un.f_uname[i][0])
1374 if (!strcmp(f->f_un.f_uname[i], ut->ut_user)) {
1375 if ((p = ttymsg(iov, iovlen, ut->ut_line,
1376 TTYMSGTIME)) != NULL) {
1377 errno = 0; /* already in msg */
1389 reapchild(int signo __unused)
1395 while ((pid = wait3(&status, WNOHANG, (struct rusage *)NULL)) > 0) {
1397 /* Don't tell while we are initting. */
1400 /* First, look if it's a process from the dead queue. */
1401 if (deadq_remove(pid))
1404 /* Now, look in list of active processes. */
1405 for (f = Files; f; f = f->f_next)
1406 if (f->f_type == F_PIPE &&
1407 f->f_un.f_pipe.f_pid == pid) {
1408 (void)close(f->f_file);
1409 f->f_un.f_pipe.f_pid = 0;
1410 log_deadchild(pid, status,
1411 f->f_un.f_pipe.f_pname);
1420 * Return a printable representation of a host address.
1423 cvthname(struct sockaddr *f)
1426 sigset_t omask, nmask;
1427 static char hname[NI_MAXHOST], ip[NI_MAXHOST];
1429 error = getnameinfo((struct sockaddr *)f,
1430 ((struct sockaddr *)f)->sa_len,
1431 ip, sizeof ip, NULL, 0, NI_NUMERICHOST);
1432 dprintf("cvthname(%s)\n", ip);
1435 dprintf("Malformed from address %s\n", gai_strerror(error));
1441 sigemptyset(&nmask);
1442 sigaddset(&nmask, SIGHUP);
1443 sigprocmask(SIG_BLOCK, &nmask, &omask);
1444 error = getnameinfo((struct sockaddr *)f,
1445 ((struct sockaddr *)f)->sa_len,
1446 hname, sizeof hname, NULL, 0, NI_NAMEREQD);
1447 sigprocmask(SIG_SETMASK, &omask, NULL);
1449 dprintf("Host name for your address (%s) unknown\n", ip);
1453 if (hl > 0 && hname[hl-1] == '.')
1455 trimdomain(hname, hl);
1467 domark(int signo __unused)
1474 * Print syslogd errors some place.
1477 logerror(const char *type)
1480 static int recursed = 0;
1482 /* If there's an error while trying to log an error, give up. */
1488 sizeof buf, "syslogd: %s: %s", type, strerror(errno));
1490 (void)snprintf(buf, sizeof buf, "syslogd: %s", type);
1492 dprintf("%s\n", buf);
1493 logmsg(LOG_SYSLOG|LOG_ERR, buf, LocalHostName, ADDDATE);
1502 int was_initialized;
1505 was_initialized = Initialized;
1506 Initialized = 0; /* Don't log SIGCHLDs. */
1507 for (f = Files; f != NULL; f = f->f_next) {
1508 /* flush any pending output */
1510 fprintlog(f, 0, (char *)NULL);
1511 if (f->f_type == F_PIPE && f->f_un.f_pipe.f_pid > 0) {
1512 (void)close(f->f_file);
1513 f->f_un.f_pipe.f_pid = 0;
1516 Initialized = was_initialized;
1518 dprintf("syslogd: exiting on signal %d\n", signo);
1519 (void)snprintf(buf, sizeof(buf), "exiting on signal %d", signo);
1523 STAILQ_FOREACH(fx, &funixes, next)
1524 (void)unlink(fx->name);
1525 pidfile_remove(pfh);
1531 * INIT -- Initialize syslogd from configuration table
1538 struct filed *f, *next, **nextp;
1540 char cline[LINE_MAX];
1541 char prog[LINE_MAX];
1542 char host[MAXHOSTNAMELEN];
1543 char oldLocalHostName[MAXHOSTNAMELEN];
1544 char hostMsg[2*MAXHOSTNAMELEN+40];
1545 char bootfileMsg[LINE_MAX];
1550 * Load hostname (may have changed).
1553 (void)strlcpy(oldLocalHostName, LocalHostName,
1554 sizeof(oldLocalHostName));
1555 if (gethostname(LocalHostName, sizeof(LocalHostName)))
1556 err(EX_OSERR, "gethostname() failed");
1557 if ((p = strchr(LocalHostName, '.')) != NULL) {
1565 * Close all open log files.
1568 for (f = Files; f != NULL; f = next) {
1569 /* flush any pending output */
1571 fprintlog(f, 0, (char *)NULL);
1573 switch (f->f_type) {
1578 (void)close(f->f_file);
1581 if (f->f_un.f_pipe.f_pid > 0) {
1582 (void)close(f->f_file);
1583 deadq_enter(f->f_un.f_pipe.f_pid,
1584 f->f_un.f_pipe.f_pname);
1586 f->f_un.f_pipe.f_pid = 0;
1590 if (f->f_program) free(f->f_program);
1591 if (f->f_host) free(f->f_host);
1597 /* open the configuration file */
1598 if ((cf = fopen(ConfFile, "r")) == NULL) {
1599 dprintf("cannot open %s\n", ConfFile);
1600 *nextp = (struct filed *)calloc(1, sizeof(*f));
1601 if (*nextp == NULL) {
1605 cfline("*.ERR\t/dev/console", *nextp, "*", "*");
1606 (*nextp)->f_next = (struct filed *)calloc(1, sizeof(*f));
1607 if ((*nextp)->f_next == NULL) {
1611 cfline("*.PANIC\t*", (*nextp)->f_next, "*", "*");
1617 * Foreach line in the conf table, open that file.
1620 (void)strlcpy(host, "*", sizeof(host));
1621 (void)strlcpy(prog, "*", sizeof(prog));
1622 while (fgets(cline, sizeof(cline), cf) != NULL) {
1624 * check for end-of-section, comments, strip off trailing
1625 * spaces and newline character. #!prog is treated specially:
1626 * following lines apply only to that program.
1628 for (p = cline; isspace(*p); ++p)
1634 if (*p != '!' && *p != '+' && *p != '-')
1637 if (*p == '+' || *p == '-') {
1641 if ((!*p) || (*p == '*')) {
1642 (void)strlcpy(host, "*", sizeof(host));
1647 for (i = 1; i < MAXHOSTNAMELEN - 1; i++) {
1648 if (!isalnum(*p) && *p != '.' && *p != '-'
1649 && *p != ',' && *p != ':' && *p != '%')
1658 while (isspace(*p)) p++;
1659 if ((!*p) || (*p == '*')) {
1660 (void)strlcpy(prog, "*", sizeof(prog));
1663 for (i = 0; i < LINE_MAX - 1; i++) {
1664 if (!isprint(p[i]) || isspace(p[i]))
1671 for (p = cline + 1; *p != '\0'; p++) {
1674 if (*(p - 1) == '\\') {
1682 for (i = strlen(cline) - 1; i >= 0 && isspace(cline[i]); i--)
1684 f = (struct filed *)calloc(1, sizeof(*f));
1691 cfline(cline, f, prog, host);
1694 /* close the configuration file */
1701 for (f = Files; f; f = f->f_next) {
1702 for (i = 0; i <= LOG_NFACILITIES; i++)
1703 if (f->f_pmask[i] == INTERNAL_NOPRI)
1706 printf("%d ", f->f_pmask[i]);
1707 printf("%s: ", TypeNames[f->f_type]);
1708 switch (f->f_type) {
1710 printf("%s", f->f_un.f_fname);
1715 printf("%s%s", _PATH_DEV, f->f_un.f_fname);
1719 port = (int)ntohs(((struct sockaddr_in *)
1720 (f->f_un.f_forw.f_addr->ai_addr))->sin_port);
1723 f->f_un.f_forw.f_hname, port);
1725 printf("%s", f->f_un.f_forw.f_hname);
1730 printf("%s", f->f_un.f_pipe.f_pname);
1734 for (i = 0; i < MAXUNAMES && *f->f_un.f_uname[i]; i++)
1735 printf("%s, ", f->f_un.f_uname[i]);
1739 printf(" (%s)", f->f_program);
1744 logmsg(LOG_SYSLOG|LOG_INFO, "syslogd: restart", LocalHostName, ADDDATE);
1745 dprintf("syslogd: restarted\n");
1747 * Log a change in hostname, but only on a restart.
1749 if (signo != 0 && strcmp(oldLocalHostName, LocalHostName) != 0) {
1750 (void)snprintf(hostMsg, sizeof(hostMsg),
1751 "syslogd: hostname changed, \"%s\" to \"%s\"",
1752 oldLocalHostName, LocalHostName);
1753 logmsg(LOG_SYSLOG|LOG_INFO, hostMsg, LocalHostName, ADDDATE);
1754 dprintf("%s\n", hostMsg);
1757 * Log the kernel boot file if we aren't going to use it as
1758 * the prefix, and if this is *not* a restart.
1760 if (signo == 0 && !use_bootfile) {
1761 (void)snprintf(bootfileMsg, sizeof(bootfileMsg),
1762 "syslogd: kernel boot file is %s", bootfile);
1763 logmsg(LOG_KERN|LOG_INFO, bootfileMsg, LocalHostName, ADDDATE);
1764 dprintf("%s\n", bootfileMsg);
1769 * Crack a configuration file line
1772 cfline(const char *line, struct filed *f, const char *prog, const char *host)
1774 struct addrinfo hints, *res;
1775 int error, i, pri, syncfile;
1778 char buf[MAXLINE], ebuf[100];
1780 dprintf("cfline(\"%s\", f, \"%s\", \"%s\")\n", line, prog, host);
1782 errno = 0; /* keep strerror() stuff out of logerror messages */
1784 /* clear out file entry */
1785 memset(f, 0, sizeof(*f));
1786 for (i = 0; i <= LOG_NFACILITIES; i++)
1787 f->f_pmask[i] = INTERNAL_NOPRI;
1789 /* save hostname if any */
1790 if (host && *host == '*')
1795 f->f_host = strdup(host);
1796 if (f->f_host == NULL) {
1800 hl = strlen(f->f_host);
1801 if (hl > 0 && f->f_host[hl-1] == '.')
1802 f->f_host[--hl] = '\0';
1803 trimdomain(f->f_host, hl);
1806 /* save program name if any */
1807 if (prog && *prog == '*')
1810 f->f_program = strdup(prog);
1811 if (f->f_program == NULL) {
1817 /* scan through the list of selectors */
1818 for (p = line; *p && *p != '\t' && *p != ' ';) {
1823 /* find the end of this facility name list */
1824 for (q = p; *q && *q != '\t' && *q != ' ' && *q++ != '.'; )
1827 /* get the priority comparison */
1855 /* collect priority name */
1856 for (bp = buf; *q && !strchr("\t,; ", *q); )
1861 while (strchr(",;", *q))
1864 /* decode priority name */
1867 pri_cmp = PRI_LT | PRI_EQ | PRI_GT;
1869 /* Ignore trailing spaces. */
1870 for (i = strlen(buf) - 1; i >= 0 && buf[i] == ' '; i--)
1873 pri = decode(buf, prioritynames);
1876 (void)snprintf(ebuf, sizeof ebuf,
1877 "unknown priority name \"%s\"", buf);
1883 pri_cmp = (UniquePriority)
1888 pri_cmp ^= PRI_LT | PRI_EQ | PRI_GT;
1890 /* scan facilities */
1891 while (*p && !strchr("\t.; ", *p)) {
1892 for (bp = buf; *p && !strchr("\t,;. ", *p); )
1897 for (i = 0; i < LOG_NFACILITIES; i++) {
1898 f->f_pmask[i] = pri;
1899 f->f_pcmp[i] = pri_cmp;
1902 i = decode(buf, facilitynames);
1905 (void)snprintf(ebuf, sizeof ebuf,
1906 "unknown facility name \"%s\"",
1911 f->f_pmask[i >> 3] = pri;
1912 f->f_pcmp[i >> 3] = pri_cmp;
1914 while (*p == ',' || *p == ' ')
1921 /* skip to action part */
1922 while (*p == '\t' || *p == ' ')
1937 * scan forward to see if there is a port defined.
1938 * so we can't use strlcpy..
1940 i = sizeof(f->f_un.f_forw.f_hname);
1941 tp = f->f_un.f_forw.f_hname;
1945 * an ipv6 address should start with a '[' in that case
1946 * we should scan for a ']'
1952 while (*p && (*p != endkey) && (i-- > 0)) {
1955 if (endkey == ']' && *p == endkey)
1959 /* See if we copied a domain and have a port */
1965 memset(&hints, 0, sizeof(hints));
1966 hints.ai_family = family;
1967 hints.ai_socktype = SOCK_DGRAM;
1968 error = getaddrinfo(f->f_un.f_forw.f_hname,
1969 p ? p : "syslog", &hints, &res);
1971 logerror(gai_strerror(error));
1974 f->f_un.f_forw.f_addr = res;
1979 if ((f->f_file = open(p, logflags, 0600)) < 0) {
1980 f->f_type = F_UNUSED;
1985 f->f_flags |= FFLAG_SYNC;
1986 if (isatty(f->f_file)) {
1987 if (strcmp(p, ctty) == 0)
1988 f->f_type = F_CONSOLE;
1991 (void)strlcpy(f->f_un.f_fname, p + sizeof(_PATH_DEV) - 1,
1992 sizeof(f->f_un.f_fname));
1994 (void)strlcpy(f->f_un.f_fname, p, sizeof(f->f_un.f_fname));
2000 f->f_un.f_pipe.f_pid = 0;
2001 (void)strlcpy(f->f_un.f_pipe.f_pname, p + 1,
2002 sizeof(f->f_un.f_pipe.f_pname));
2011 for (i = 0; i < MAXUNAMES && *p; i++) {
2012 for (q = p; *q && *q != ','; )
2014 (void)strncpy(f->f_un.f_uname[i], p, MAXLOGNAME - 1);
2015 if ((q - p) >= MAXLOGNAME)
2016 f->f_un.f_uname[i][MAXLOGNAME - 1] = '\0';
2018 f->f_un.f_uname[i][q - p] = '\0';
2019 while (*q == ',' || *q == ' ')
2023 f->f_type = F_USERS;
2030 * Decode a symbolic name to a numeric value
2033 decode(const char *name, CODE *codetab)
2039 return (atoi(name));
2041 for (p = buf; *name && p < &buf[sizeof(buf) - 1]; p++, name++) {
2043 *p = tolower(*name);
2048 for (c = codetab; c->c_name; c++)
2049 if (!strcmp(buf, c->c_name))
2061 now = time((time_t *)NULL);
2062 MarkSeq += TIMERINTVL;
2063 if (MarkSeq >= MarkInterval) {
2064 logmsg(LOG_INFO, "-- MARK --",
2065 LocalHostName, ADDDATE|MARK);
2069 for (f = Files; f; f = f->f_next) {
2070 if (f->f_prevcount && now >= REPEATTIME(f)) {
2071 dprintf("flush %s: repeated %d times, %d sec.\n",
2072 TypeNames[f->f_type], f->f_prevcount,
2073 repeatinterval[f->f_repeatcount]);
2074 fprintlog(f, 0, (char *)NULL);
2079 /* Walk the dead queue, and see if we should signal somebody. */
2080 for (q = TAILQ_FIRST(&deadq_head); q != NULL; q = next) {
2081 next = TAILQ_NEXT(q, dq_entries);
2083 switch (q->dq_timeout) {
2085 /* Already signalled once, try harder now. */
2086 if (kill(q->dq_pid, SIGKILL) != 0)
2087 (void)deadq_remove(q->dq_pid);
2092 * Timed out on dead queue, send terminate
2093 * signal. Note that we leave the removal
2094 * from the dead queue to reapchild(), which
2095 * will also log the event (unless the process
2096 * didn't even really exist, in case we simply
2097 * drop it from the dead queue).
2099 if (kill(q->dq_pid, SIGTERM) != 0)
2100 (void)deadq_remove(q->dq_pid);
2108 (void)alarm(TIMERINTVL);
2112 * fork off and become a daemon, but wait for the child to come online
2113 * before returing to the parent, or we get disk thrashing at boot etc.
2114 * Set a timer so we don't hang forever if it wedges.
2117 waitdaemon(int nochdir, int noclose, int maxwait)
2121 pid_t pid, childpid;
2123 switch (childpid = fork()) {
2129 signal(SIGALRM, timedout);
2131 while ((pid = wait3(&status, 0, NULL)) != -1) {
2132 if (WIFEXITED(status))
2133 errx(1, "child pid %d exited with return code %d",
2134 pid, WEXITSTATUS(status));
2135 if (WIFSIGNALED(status))
2136 errx(1, "child pid %d exited on signal %d%s",
2137 pid, WTERMSIG(status),
2138 WCOREDUMP(status) ? " (core dumped)" :
2140 if (pid == childpid) /* it's gone... */
2152 if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
2153 (void)dup2(fd, STDIN_FILENO);
2154 (void)dup2(fd, STDOUT_FILENO);
2155 (void)dup2(fd, STDERR_FILENO);
2163 * We get a SIGALRM from the child when it's running and finished doing it's
2164 * fsync()'s or O_SYNC writes for all the boot messages.
2166 * We also get a signal from the kernel if the timer expires, so check to
2167 * see what happened.
2170 timedout(int sig __unused)
2174 signal(SIGALRM, SIG_DFL);
2176 errx(1, "timed out waiting for child");
2182 * Add `s' to the list of allowable peer addresses to accept messages
2185 * `s' is a string in the form:
2187 * [*]domainname[:{servicename|portnumber|*}]
2191 * netaddr/maskbits[:{servicename|portnumber|*}]
2193 * Returns -1 on error, 0 if the argument was valid.
2199 struct allowedpeer ap;
2202 struct addrinfo hints, *res;
2203 struct in_addr *addrp, *maskp;
2206 u_int32_t *addr6p, *mask6p;
2208 char ip[NI_MAXHOST];
2211 if (*s != '[' || (cp1 = strchr(s + 1, ']')) == NULL)
2214 if ((cp1 = strrchr(cp1, ':'))) {
2215 /* service/port provided */
2217 if (strlen(cp1) == 1 && *cp1 == '*')
2218 /* any port allowed */
2220 else if ((se = getservbyname(cp1, "udp"))) {
2221 ap.port = ntohs(se->s_port);
2223 ap.port = strtol(cp1, &cp2, 0);
2225 return (-1); /* port not numeric */
2228 if ((se = getservbyname("syslog", "udp")))
2229 ap.port = ntohs(se->s_port);
2231 /* sanity, should not happen */
2235 if ((cp1 = strchr(s, '/')) != NULL &&
2236 strspn(cp1 + 1, "0123456789") == strlen(cp1 + 1)) {
2238 if ((masklen = atoi(cp1 + 1)) < 0)
2243 cp2 = s + strlen(s) - 1;
2254 memset(&hints, 0, sizeof(hints));
2255 hints.ai_family = PF_UNSPEC;
2256 hints.ai_socktype = SOCK_DGRAM;
2257 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
2258 if (getaddrinfo(s, NULL, &hints, &res) == 0) {
2260 memcpy(&ap.a_addr, res->ai_addr, res->ai_addrlen);
2261 memset(&ap.a_mask, 0, sizeof(ap.a_mask));
2262 ap.a_mask.ss_family = res->ai_family;
2263 if (res->ai_family == AF_INET) {
2264 ap.a_mask.ss_len = sizeof(struct sockaddr_in);
2265 maskp = &((struct sockaddr_in *)&ap.a_mask)->sin_addr;
2266 addrp = &((struct sockaddr_in *)&ap.a_addr)->sin_addr;
2268 /* use default netmask */
2269 if (IN_CLASSA(ntohl(addrp->s_addr)))
2270 maskp->s_addr = htonl(IN_CLASSA_NET);
2271 else if (IN_CLASSB(ntohl(addrp->s_addr)))
2272 maskp->s_addr = htonl(IN_CLASSB_NET);
2274 maskp->s_addr = htonl(IN_CLASSC_NET);
2275 } else if (masklen <= 32) {
2276 /* convert masklen to netmask */
2280 maskp->s_addr = htonl(~((1 << (32 - masklen)) - 1));
2285 /* Lose any host bits in the network number. */
2286 addrp->s_addr &= maskp->s_addr;
2289 else if (res->ai_family == AF_INET6 && masklen <= 128) {
2290 ap.a_mask.ss_len = sizeof(struct sockaddr_in6);
2293 mask6p = (u_int32_t *)&((struct sockaddr_in6 *)&ap.a_mask)->sin6_addr;
2294 /* convert masklen to netmask */
2295 while (masklen > 0) {
2297 *mask6p = htonl(~(0xffffffff >> masklen));
2300 *mask6p++ = 0xffffffff;
2303 /* Lose any host bits in the network number. */
2304 mask6p = (u_int32_t *)&((struct sockaddr_in6 *)&ap.a_mask)->sin6_addr;
2305 addr6p = (u_int32_t *)&((struct sockaddr_in6 *)&ap.a_addr)->sin6_addr;
2306 for (i = 0; i < 4; i++)
2307 addr6p[i] &= mask6p[i];
2316 /* arg `s' is domain name */
2330 printf("allowaddr: rule %d: ", NumAllowed);
2332 printf("numeric, ");
2333 getnameinfo((struct sockaddr *)&ap.a_addr,
2334 ((struct sockaddr *)&ap.a_addr)->sa_len,
2335 ip, sizeof ip, NULL, 0, NI_NUMERICHOST);
2336 printf("addr = %s, ", ip);
2337 getnameinfo((struct sockaddr *)&ap.a_mask,
2338 ((struct sockaddr *)&ap.a_mask)->sa_len,
2339 ip, sizeof ip, NULL, 0, NI_NUMERICHOST);
2340 printf("mask = %s; ", ip);
2342 printf("domainname = %s; ", ap.a_name);
2344 printf("port = %d\n", ap.port);
2347 if ((AllowedPeers = realloc(AllowedPeers,
2348 ++NumAllowed * sizeof(struct allowedpeer)))
2350 logerror("realloc");
2353 memcpy(&AllowedPeers[NumAllowed - 1], &ap, sizeof(struct allowedpeer));
2358 * Validate that the remote peer has permission to log to us.
2361 validate(struct sockaddr *sa, const char *hname)
2365 char *cp, name[NI_MAXHOST], ip[NI_MAXHOST], port[NI_MAXSERV];
2366 struct allowedpeer *ap;
2367 struct sockaddr_in *sin4, *a4p = NULL, *m4p = NULL;
2370 struct sockaddr_in6 *sin6, *a6p = NULL, *m6p = NULL;
2372 struct addrinfo hints, *res;
2375 if (NumAllowed == 0)
2376 /* traditional behaviour, allow everything */
2379 (void)strlcpy(name, hname, sizeof(name));
2380 memset(&hints, 0, sizeof(hints));
2381 hints.ai_family = PF_UNSPEC;
2382 hints.ai_socktype = SOCK_DGRAM;
2383 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
2384 if (getaddrinfo(name, NULL, &hints, &res) == 0)
2386 else if (strchr(name, '.') == NULL) {
2387 strlcat(name, ".", sizeof name);
2388 strlcat(name, LocalDomain, sizeof name);
2390 if (getnameinfo(sa, sa->sa_len, ip, sizeof ip, port, sizeof port,
2391 NI_NUMERICHOST | NI_NUMERICSERV) != 0)
2392 return (0); /* for safety, should not occur */
2393 dprintf("validate: dgram from IP %s, port %s, name %s;\n",
2397 /* now, walk down the list */
2398 for (i = 0, ap = AllowedPeers; i < NumAllowed; i++, ap++) {
2399 if (ap->port != 0 && ap->port != sport) {
2400 dprintf("rejected in rule %d due to port mismatch.\n", i);
2404 if (ap->isnumeric) {
2405 if (ap->a_addr.ss_family != sa->sa_family) {
2406 dprintf("rejected in rule %d due to address family mismatch.\n", i);
2409 if (ap->a_addr.ss_family == AF_INET) {
2410 sin4 = (struct sockaddr_in *)sa;
2411 a4p = (struct sockaddr_in *)&ap->a_addr;
2412 m4p = (struct sockaddr_in *)&ap->a_mask;
2413 if ((sin4->sin_addr.s_addr & m4p->sin_addr.s_addr)
2414 != a4p->sin_addr.s_addr) {
2415 dprintf("rejected in rule %d due to IP mismatch.\n", i);
2420 else if (ap->a_addr.ss_family == AF_INET6) {
2421 sin6 = (struct sockaddr_in6 *)sa;
2422 a6p = (struct sockaddr_in6 *)&ap->a_addr;
2423 m6p = (struct sockaddr_in6 *)&ap->a_mask;
2424 if (a6p->sin6_scope_id != 0 &&
2425 sin6->sin6_scope_id != a6p->sin6_scope_id) {
2426 dprintf("rejected in rule %d due to scope mismatch.\n", i);
2430 for (j = 0; j < 16; j += 4) {
2431 if ((*(u_int32_t *)&sin6->sin6_addr.s6_addr[j] & *(u_int32_t *)&m6p->sin6_addr.s6_addr[j])
2432 != *(u_int32_t *)&a6p->sin6_addr.s6_addr[j]) {
2438 dprintf("rejected in rule %d due to IP mismatch.\n", i);
2449 /* allow wildmatch */
2452 if (l2 > l1 || memcmp(cp, &name[l1 - l2], l2) != 0) {
2453 dprintf("rejected in rule %d due to name mismatch.\n", i);
2459 if (l2 != l1 || memcmp(cp, name, l1) != 0) {
2460 dprintf("rejected in rule %d due to name mismatch.\n", i);
2465 dprintf("accepted in rule %d.\n", i);
2466 return (1); /* hooray! */
2472 * Fairly similar to popen(3), but returns an open descriptor, as
2473 * opposed to a FILE *.
2476 p_open(const char *prog, pid_t *rpid)
2478 int pfd[2], nulldesc;
2480 sigset_t omask, mask;
2481 char *argv[4]; /* sh -c cmd NULL */
2484 if (pipe(pfd) == -1)
2486 if ((nulldesc = open(_PATH_DEVNULL, O_RDWR)) == -1)
2487 /* we are royally screwed anyway */
2491 sigaddset(&mask, SIGALRM);
2492 sigaddset(&mask, SIGHUP);
2493 sigprocmask(SIG_BLOCK, &mask, &omask);
2494 switch ((pid = fork())) {
2496 sigprocmask(SIG_SETMASK, &omask, 0);
2501 argv[0] = strdup("sh");
2502 argv[1] = strdup("-c");
2503 argv[2] = strdup(prog);
2505 if (argv[0] == NULL || argv[1] == NULL || argv[2] == NULL) {
2511 (void)setsid(); /* Avoid catching SIGHUPs. */
2514 * Throw away pending signals, and reset signal
2515 * behaviour to standard values.
2517 signal(SIGALRM, SIG_IGN);
2518 signal(SIGHUP, SIG_IGN);
2519 sigprocmask(SIG_SETMASK, &omask, 0);
2520 signal(SIGPIPE, SIG_DFL);
2521 signal(SIGQUIT, SIG_DFL);
2522 signal(SIGALRM, SIG_DFL);
2523 signal(SIGHUP, SIG_DFL);
2525 dup2(pfd[0], STDIN_FILENO);
2526 dup2(nulldesc, STDOUT_FILENO);
2527 dup2(nulldesc, STDERR_FILENO);
2530 (void)execvp(_PATH_BSHELL, argv);
2534 sigprocmask(SIG_SETMASK, &omask, 0);
2538 * Avoid blocking on a hung pipe. With O_NONBLOCK, we are
2539 * supposed to get an EWOULDBLOCK on writev(2), which is
2540 * caught by the logic above anyway, which will in turn close
2541 * the pipe, and fork a new logging subprocess if necessary.
2542 * The stale subprocess will be killed some time later unless
2543 * it terminated itself due to closing its input pipe (so we
2544 * get rid of really dead puppies).
2546 if (fcntl(pfd[1], F_SETFL, O_NONBLOCK) == -1) {
2548 (void)snprintf(errmsg, sizeof errmsg,
2549 "Warning: cannot change pipe to PID %d to "
2550 "non-blocking behaviour.",
2559 deadq_enter(pid_t pid, const char *name)
2565 * Be paranoid, if we can't signal the process, don't enter it
2566 * into the dead queue (perhaps it's already dead). If possible,
2567 * we try to fetch and log the child's status.
2569 if (kill(pid, 0) != 0) {
2570 if (waitpid(pid, &status, WNOHANG) > 0)
2571 log_deadchild(pid, status, name);
2575 p = malloc(sizeof(struct deadq_entry));
2582 p->dq_timeout = DQ_TIMO_INIT;
2583 TAILQ_INSERT_TAIL(&deadq_head, p, dq_entries);
2587 deadq_remove(pid_t pid)
2591 TAILQ_FOREACH(q, &deadq_head, dq_entries) {
2592 if (q->dq_pid == pid) {
2593 TAILQ_REMOVE(&deadq_head, q, dq_entries);
2603 log_deadchild(pid_t pid, int status, const char *name)
2609 errno = 0; /* Keep strerror() stuff out of logerror messages. */
2610 if (WIFSIGNALED(status)) {
2611 reason = "due to signal";
2612 code = WTERMSIG(status);
2614 reason = "with status";
2615 code = WEXITSTATUS(status);
2619 (void)snprintf(buf, sizeof buf,
2620 "Logging subprocess %d (%s) exited %s %d.",
2621 pid, name, reason, code);
2626 socksetup(int af, char *bindhostname)
2628 struct addrinfo hints, *res, *r;
2629 const char *bindservice;
2631 int error, maxs, *s, *socks;
2634 * We have to handle this case for backwards compatibility:
2635 * If there are two (or more) colons but no '[' and ']',
2636 * assume this is an inet6 address without a service.
2638 bindservice = "syslog";
2639 if (bindhostname != NULL) {
2641 if (*bindhostname == '[' &&
2642 (cp = strchr(bindhostname + 1, ']')) != NULL) {
2645 if (cp[1] == ':' && cp[2] != '\0')
2646 bindservice = cp + 2;
2649 cp = strchr(bindhostname, ':');
2650 if (cp != NULL && strchr(cp + 1, ':') == NULL) {
2653 bindservice = cp + 1;
2654 if (cp == bindhostname)
2655 bindhostname = NULL;
2662 memset(&hints, 0, sizeof(hints));
2663 hints.ai_flags = AI_PASSIVE;
2664 hints.ai_family = af;
2665 hints.ai_socktype = SOCK_DGRAM;
2666 error = getaddrinfo(bindhostname, bindservice, &hints, &res);
2668 logerror(gai_strerror(error));
2673 /* Count max number of sockets we may open */
2674 for (maxs = 0, r = res; r; r = r->ai_next, maxs++);
2675 socks = malloc((maxs+1) * sizeof(int));
2676 if (socks == NULL) {
2677 logerror("couldn't allocate memory for sockets");
2681 *socks = 0; /* num of sockets counter at start of array */
2683 for (r = res; r; r = r->ai_next) {
2685 *s = socket(r->ai_family, r->ai_socktype, r->ai_protocol);
2691 if (r->ai_family == AF_INET6) {
2692 if (setsockopt(*s, IPPROTO_IPV6, IPV6_V6ONLY,
2693 (char *)&on, sizeof (on)) < 0) {
2694 logerror("setsockopt");
2700 if (setsockopt(*s, SOL_SOCKET, SO_REUSEADDR,
2701 (char *)&on, sizeof (on)) < 0) {
2702 logerror("setsockopt");
2707 * RFC 3164 recommends that client side message
2708 * should come from the privileged syslogd port.
2710 * If the system administrator choose not to obey
2711 * this, we can skip the bind() step so that the
2712 * system will choose a port for us.
2715 if (bind(*s, r->ai_addr, r->ai_addrlen) < 0) {
2745 socklen_t slen, len;
2747 if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &len, &slen) == 0) {
2749 setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &len, slen);