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) {
560 logerror("shutdown");
566 dprintf("listening on inet and/or inet6 socket\n");
568 dprintf("sending on inet and/or inet6 socket\n");
571 if ((fklog = open(_PATH_KLOG, O_RDONLY, 0)) >= 0)
572 if (fcntl(fklog, F_SETFL, O_NONBLOCK) < 0)
575 dprintf("can't open %s (%d)\n", _PATH_KLOG, errno);
577 /* tuck my process id away */
580 dprintf("off & running....\n");
583 /* prevent SIGHUP and SIGCHLD handlers from running in parallel */
585 sigaddset(&mask, SIGCHLD);
586 sact.sa_handler = init;
588 sact.sa_flags = SA_RESTART;
589 (void)sigaction(SIGHUP, &sact, NULL);
592 tv.tv_sec = tv.tv_usec = 0;
594 if (fklog != -1 && fklog > fdsrmax)
596 if (finet && !SecureMode) {
597 for (i = 0; i < *finet; i++) {
598 if (finet[i+1] != -1 && finet[i+1] > fdsrmax)
599 fdsrmax = finet[i+1];
602 STAILQ_FOREACH(fx, &funixes, next)
606 fdsr = (fd_set *)calloc(howmany(fdsrmax+1, NFDBITS),
609 errx(1, "calloc fd_set");
617 bzero(fdsr, howmany(fdsrmax+1, NFDBITS) *
622 if (finet && !SecureMode) {
623 for (i = 0; i < *finet; i++) {
624 if (finet[i+1] != -1)
625 FD_SET(finet[i+1], fdsr);
628 STAILQ_FOREACH(fx, &funixes, next)
631 i = select(fdsrmax+1, fdsr, NULL, NULL,
632 needdofsync ? &tv : tvp);
648 if (fklog != -1 && FD_ISSET(fklog, fdsr))
650 if (finet && !SecureMode) {
651 for (i = 0; i < *finet; i++) {
652 if (FD_ISSET(finet[i+1], fdsr)) {
653 len = sizeof(frominet);
654 l = recvfrom(finet[i+1], line, MAXLINE,
655 0, (struct sockaddr *)&frominet,
659 hname = cvthname((struct sockaddr *)&frominet);
660 unmapped((struct sockaddr *)&frominet);
661 if (validate((struct sockaddr *)&frominet, hname))
662 printline(hname, line, RemoteAddDate ? ADDDATE : 0);
663 } else if (l < 0 && errno != EINTR)
664 logerror("recvfrom inet");
668 STAILQ_FOREACH(fx, &funixes, next) {
669 if (FD_ISSET(fx->s, fdsr)) {
670 len = sizeof(fromunix);
671 l = recvfrom(fx->s, line, MAXLINE, 0,
672 (struct sockaddr *)&fromunix, &len);
675 printline(LocalHostName, line, 0);
676 } else if (l < 0 && errno != EINTR)
677 logerror("recvfrom unix");
686 unmapped(struct sockaddr *sa)
688 struct sockaddr_in6 *sin6;
689 struct sockaddr_in sin4;
691 if (sa->sa_family != AF_INET6)
693 if (sa->sa_len != sizeof(struct sockaddr_in6) ||
694 sizeof(sin4) > sa->sa_len)
696 sin6 = (struct sockaddr_in6 *)sa;
697 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
700 memset(&sin4, 0, sizeof(sin4));
701 sin4.sin_family = AF_INET;
702 sin4.sin_len = sizeof(struct sockaddr_in);
703 memcpy(&sin4.sin_addr, &sin6->sin6_addr.s6_addr[12],
704 sizeof(sin4.sin_addr));
705 sin4.sin_port = sin6->sin6_port;
707 memcpy(sa, &sin4, sin4.sin_len);
714 fprintf(stderr, "%s\n%s\n%s\n%s\n",
715 "usage: syslogd [-468ACcdknosTuv] [-a allowed_peer]",
716 " [-b bind_address] [-f config_file]",
717 " [-l [mode:]path] [-m mark_interval]",
718 " [-P pid_file] [-p log_socket]");
723 * Take a raw input line, decode the message, and print the message
724 * on the appropriate log files.
727 printline(const char *hname, char *msg, int flags)
732 char line[MAXLINE + 1];
734 /* test for special codes */
739 n = strtol(p + 1, &q, 10);
740 if (*q == '>' && n >= 0 && n < INT_MAX && errno == 0) {
745 if (pri &~ (LOG_FACMASK|LOG_PRIMASK))
749 * Don't allow users to log kernel messages.
750 * NOTE: since LOG_KERN == 0 this will also match
751 * messages with no facility specified.
753 if ((pri & LOG_FACMASK) == LOG_KERN && !KeepKernFac)
754 pri = LOG_MAKEPRI(LOG_USER, LOG_PRI(pri));
758 while ((c = (unsigned char)*p++) != '\0' &&
759 q < &line[sizeof(line) - 4]) {
760 if (mask_C1 && (c & 0x80) && c < 0xA0) {
765 if (isascii(c) && iscntrl(c)) {
768 } else if (c == '\t') {
780 logmsg(pri, line, hname, flags);
784 * Read /dev/klog while data are available, split into lines.
789 char *p, *q, line[MAXLINE + 1];
794 i = read(fklog, line + len, MAXLINE - 1 - len);
796 line[i + len] = '\0';
798 if (i < 0 && errno != EINTR && errno != EAGAIN) {
805 for (p = line; (q = strchr(p, '\n')) != NULL; p = q + 1) {
810 if (len >= MAXLINE - 1) {
815 memmove(line, p, len + 1);
822 * Take a raw input line from /dev/klog, format similar to syslog().
829 int flags, isprintf, pri;
831 flags = ISKERNEL | SYNC_FILE | ADDDATE; /* fsync after write */
837 n = strtol(p + 1, &q, 10);
838 if (*q == '>' && n >= 0 && n < INT_MAX && errno == 0) {
845 * Kernel printf's and LOG_CONSOLE messages have been displayed
846 * on the console already.
848 if (isprintf || (pri & LOG_FACMASK) == LOG_CONSOLE)
850 if (pri &~ (LOG_FACMASK|LOG_PRIMASK))
852 logmsg(pri, p, LocalHostName, flags);
858 * Match a program or host name against a specification.
859 * Return a non-0 value if the message must be ignored
860 * based on the specification.
863 skip_message(const char *name, const char *spec, int checkcase)
868 /* Behaviour on explicit match */
883 s = strstr (spec, name);
885 s = strcasestr (spec, name);
888 prev = (s == spec ? ',' : *(s - 1));
889 next = *(s + strlen (name));
891 if (prev == ',' && (next == '\0' || next == ','))
892 /* Explicit match: skip iff the spec is an
897 /* No explicit match for this name: skip the message iff
898 the spec is an inclusive one. */
903 * Log a message to the appropriate log files, users, etc. based on
907 logmsg(int pri, const char *msg, const char *from, int flags)
910 int i, fac, msglen, omask, prilev;
911 const char *timestamp;
912 char prog[NAME_MAX+1];
915 dprintf("logmsg: pri %o, flags %x, from %s, msg %s\n",
916 pri, flags, from, msg);
918 omask = sigblock(sigmask(SIGHUP)|sigmask(SIGALRM));
921 * Check to see if msg looks non-standard.
923 msglen = strlen(msg);
924 if (msglen < 16 || msg[3] != ' ' || msg[6] != ' ' ||
925 msg[9] != ':' || msg[12] != ':' || msg[15] != ' ')
929 if (flags & ADDDATE) {
930 timestamp = ctime(&now) + 4;
937 /* skip leading blanks */
938 while (isspace(*msg)) {
943 /* extract facility and priority level */
945 fac = LOG_NFACILITIES;
949 /* Check maximum facility number. */
950 if (fac > LOG_NFACILITIES) {
951 (void)sigsetmask(omask);
955 prilev = LOG_PRI(pri);
957 /* extract program name */
958 for (i = 0; i < NAME_MAX; i++) {
959 if (!isprint(msg[i]) || msg[i] == ':' || msg[i] == '[' ||
960 msg[i] == '/' || isspace(msg[i]))
966 /* add kernel prefix for kernel messages */
967 if (flags & ISKERNEL) {
968 snprintf(buf, sizeof(buf), "%s: %s",
969 use_bootfile ? bootfile : "kernel", msg);
971 msglen = strlen(buf);
974 /* log the message to the particular outputs */
978 * Open in non-blocking mode to avoid hangs during open
979 * and close(waiting for the port to drain).
981 f->f_file = open(ctty, O_WRONLY | O_NONBLOCK, 0);
983 if (f->f_file >= 0) {
984 (void)strlcpy(f->f_lasttime, timestamp,
985 sizeof(f->f_lasttime));
986 fprintlog(f, flags, msg);
987 (void)close(f->f_file);
989 (void)sigsetmask(omask);
992 for (f = Files; f; f = f->f_next) {
993 /* skip messages that are incorrect priority */
994 if (!(((f->f_pcmp[fac] & PRI_EQ) && (f->f_pmask[fac] == prilev))
995 ||((f->f_pcmp[fac] & PRI_LT) && (f->f_pmask[fac] < prilev))
996 ||((f->f_pcmp[fac] & PRI_GT) && (f->f_pmask[fac] > prilev))
998 || f->f_pmask[fac] == INTERNAL_NOPRI)
1001 /* skip messages with the incorrect hostname */
1002 if (skip_message(from, f->f_host, 0))
1005 /* skip messages with the incorrect program name */
1006 if (skip_message(prog, f->f_program, 1))
1009 /* skip message to console if it has already been printed */
1010 if (f->f_type == F_CONSOLE && (flags & IGN_CONS))
1013 /* don't output marks to recently written files */
1014 if ((flags & MARK) && (now - f->f_time) < MarkInterval / 2)
1018 * suppress duplicate lines to this file
1020 if (no_compress - (f->f_type != F_PIPE) < 1 &&
1021 (flags & MARK) == 0 && msglen == f->f_prevlen &&
1022 f->f_prevline && !strcmp(msg, f->f_prevline) &&
1023 !strcasecmp(from, f->f_prevhost)) {
1024 (void)strlcpy(f->f_lasttime, timestamp,
1025 sizeof(f->f_lasttime));
1027 dprintf("msg repeated %d times, %ld sec of %d\n",
1028 f->f_prevcount, (long)(now - f->f_time),
1029 repeatinterval[f->f_repeatcount]);
1031 * If domark would have logged this by now,
1032 * flush it now (so we don't hold isolated messages),
1033 * but back off so we'll flush less often
1036 if (now > REPEATTIME(f)) {
1037 fprintlog(f, flags, (char *)NULL);
1041 /* new line, save it */
1043 fprintlog(f, 0, (char *)NULL);
1044 f->f_repeatcount = 0;
1046 (void)strlcpy(f->f_lasttime, timestamp,
1047 sizeof(f->f_lasttime));
1048 (void)strlcpy(f->f_prevhost, from,
1049 sizeof(f->f_prevhost));
1050 if (msglen < MAXSVLINE) {
1051 f->f_prevlen = msglen;
1052 (void)strlcpy(f->f_prevline, msg, sizeof(f->f_prevline));
1053 fprintlog(f, flags, (char *)NULL);
1055 f->f_prevline[0] = 0;
1057 fprintlog(f, flags, msg);
1061 (void)sigsetmask(omask);
1069 for (f = Files; f; f = f->f_next) {
1070 if ((f->f_type == F_FILE) &&
1071 (f->f_flags & FFLAG_NEEDSYNC)) {
1072 f->f_flags &= ~FFLAG_NEEDSYNC;
1073 (void)fsync(f->f_file);
1080 fprintlog(struct filed *f, int flags, const char *msg)
1082 struct iovec iov[IOV_SIZE];
1085 int i, l, lsent = 0;
1086 char line[MAXLINE + 1], repbuf[80], greetings[200], *wmsg = NULL;
1087 char nul[] = "", space[] = " ", lf[] = "\n", crlf[] = "\r\n";
1091 if (f->f_type == F_WALL) {
1092 v->iov_base = greetings;
1093 /* The time displayed is not synchornized with the other log
1094 * destinations (like messages). Following fragment was using
1095 * ctime(&now), which was updating the time every 30 sec.
1096 * With f_lasttime, time is synchronized correctly.
1098 v->iov_len = snprintf(greetings, sizeof greetings,
1099 "\r\n\7Message from syslogd@%s at %.24s ...\r\n",
1100 f->f_prevhost, f->f_lasttime);
1101 if (v->iov_len >= sizeof greetings)
1102 v->iov_len = sizeof greetings - 1;
1108 v->iov_base = f->f_lasttime;
1109 v->iov_len = strlen(f->f_lasttime);
1111 v->iov_base = space;
1117 static char fp_buf[30]; /* Hollow laugh */
1118 int fac = f->f_prevpri & LOG_FACMASK;
1119 int pri = LOG_PRI(f->f_prevpri);
1120 const char *f_s = NULL;
1121 char f_n[5]; /* Hollow laugh */
1122 const char *p_s = NULL;
1123 char p_n[5]; /* Hollow laugh */
1125 if (LogFacPri > 1) {
1128 for (c = facilitynames; c->c_name; c++) {
1129 if (c->c_val == fac) {
1134 for (c = prioritynames; c->c_name; c++) {
1135 if (c->c_val == pri) {
1142 snprintf(f_n, sizeof f_n, "%d", LOG_FAC(fac));
1146 snprintf(p_n, sizeof p_n, "%d", pri);
1149 snprintf(fp_buf, sizeof fp_buf, "<%s.%s> ", f_s, p_s);
1150 v->iov_base = fp_buf;
1151 v->iov_len = strlen(fp_buf);
1158 v->iov_base = f->f_prevhost;
1159 v->iov_len = strlen(v->iov_base);
1161 v->iov_base = space;
1166 wmsg = strdup(msg); /* XXX iov_base needs a `const' sibling. */
1172 v->iov_len = strlen(msg);
1173 } else if (f->f_prevcount > 1) {
1174 v->iov_base = repbuf;
1175 v->iov_len = snprintf(repbuf, sizeof repbuf,
1176 "last message repeated %d times", f->f_prevcount);
1177 } else if (f->f_prevline) {
1178 v->iov_base = f->f_prevline;
1179 v->iov_len = f->f_prevlen;
1185 dprintf("Logging to %s", TypeNames[f->f_type]);
1188 switch (f->f_type) {
1195 port = (int)ntohs(((struct sockaddr_in *)
1196 (f->f_un.f_forw.f_addr->ai_addr))->sin_port);
1198 dprintf(" %s:%d\n", f->f_un.f_forw.f_hname, port);
1200 dprintf(" %s\n", f->f_un.f_forw.f_hname);
1202 /* check for local vs remote messages */
1203 if (strcasecmp(f->f_prevhost, LocalHostName))
1204 l = snprintf(line, sizeof line - 1,
1205 "<%d>%.15s Forwarded from %s: %s",
1206 f->f_prevpri, (char *)iov[0].iov_base,
1207 f->f_prevhost, (char *)iov[5].iov_base);
1209 l = snprintf(line, sizeof line - 1, "<%d>%.15s %s",
1210 f->f_prevpri, (char *)iov[0].iov_base,
1211 (char *)iov[5].iov_base);
1214 else if (l > MAXLINE)
1218 for (r = f->f_un.f_forw.f_addr; r; r = r->ai_next) {
1219 for (i = 0; i < *finet; i++) {
1222 * should we check AF first, or just
1223 * trial and error? FWD
1226 address_family_of(finet[i+1]))
1228 lsent = sendto(finet[i+1], line, l, 0,
1229 r->ai_addr, r->ai_addrlen);
1233 if (lsent == l && !send_to_all)
1236 dprintf("lsent/l: %d/%d\n", lsent, l);
1249 /* case ENOTSOCK: */
1251 /* case EMSGSIZE: */
1254 /* case ECONNREFUSED: */
1256 dprintf("removing entry\n");
1257 f->f_type = F_UNUSED;
1265 dprintf(" %s\n", f->f_un.f_fname);
1268 if (writev(f->f_file, iov, IOV_SIZE) < 0) {
1270 * If writev(2) fails for potentially transient errors
1271 * like the filesystem being full, ignore it.
1272 * Otherwise remove this logfile from the list.
1274 if (errno != ENOSPC) {
1276 (void)close(f->f_file);
1277 f->f_type = F_UNUSED;
1279 logerror(f->f_un.f_fname);
1281 } else if ((flags & SYNC_FILE) && (f->f_flags & FFLAG_SYNC)) {
1282 f->f_flags |= FFLAG_NEEDSYNC;
1288 dprintf(" %s\n", f->f_un.f_pipe.f_pname);
1291 if (f->f_un.f_pipe.f_pid == 0) {
1292 if ((f->f_file = p_open(f->f_un.f_pipe.f_pname,
1293 &f->f_un.f_pipe.f_pid)) < 0) {
1294 f->f_type = F_UNUSED;
1295 logerror(f->f_un.f_pipe.f_pname);
1299 if (writev(f->f_file, iov, IOV_SIZE) < 0) {
1301 (void)close(f->f_file);
1302 if (f->f_un.f_pipe.f_pid > 0)
1303 deadq_enter(f->f_un.f_pipe.f_pid,
1304 f->f_un.f_pipe.f_pname);
1305 f->f_un.f_pipe.f_pid = 0;
1307 logerror(f->f_un.f_pipe.f_pname);
1312 if (flags & IGN_CONS) {
1313 dprintf(" (ignored)\n");
1319 dprintf(" %s%s\n", _PATH_DEV, f->f_un.f_fname);
1323 errno = 0; /* ttymsg() only sometimes returns an errno */
1324 if ((msgret = ttymsg(iov, IOV_SIZE, f->f_un.f_fname, 10))) {
1325 f->f_type = F_UNUSED;
1335 wallmsg(f, iov, IOV_SIZE);
1343 * WALLMSG -- Write a message to the world at large
1345 * Write the specified message to either the entire
1346 * world, or a list of approved users.
1349 wallmsg(struct filed *f, struct iovec *iov, const int iovlen)
1351 static int reenter; /* avoid calling ourselves */
1360 while ((ut = getutxent()) != NULL) {
1361 if (ut->ut_type != USER_PROCESS)
1363 if (f->f_type == F_WALL) {
1364 if ((p = ttymsg(iov, iovlen, ut->ut_line,
1365 TTYMSGTIME)) != NULL) {
1366 errno = 0; /* already in msg */
1371 /* should we send the message to this user? */
1372 for (i = 0; i < MAXUNAMES; i++) {
1373 if (!f->f_un.f_uname[i][0])
1375 if (!strcmp(f->f_un.f_uname[i], ut->ut_user)) {
1376 if ((p = ttymsg(iov, iovlen, ut->ut_line,
1377 TTYMSGTIME)) != NULL) {
1378 errno = 0; /* already in msg */
1390 reapchild(int signo __unused)
1396 while ((pid = wait3(&status, WNOHANG, (struct rusage *)NULL)) > 0) {
1398 /* Don't tell while we are initting. */
1401 /* First, look if it's a process from the dead queue. */
1402 if (deadq_remove(pid))
1405 /* Now, look in list of active processes. */
1406 for (f = Files; f; f = f->f_next)
1407 if (f->f_type == F_PIPE &&
1408 f->f_un.f_pipe.f_pid == pid) {
1409 (void)close(f->f_file);
1410 f->f_un.f_pipe.f_pid = 0;
1411 log_deadchild(pid, status,
1412 f->f_un.f_pipe.f_pname);
1421 * Return a printable representation of a host address.
1424 cvthname(struct sockaddr *f)
1427 sigset_t omask, nmask;
1428 static char hname[NI_MAXHOST], ip[NI_MAXHOST];
1430 error = getnameinfo((struct sockaddr *)f,
1431 ((struct sockaddr *)f)->sa_len,
1432 ip, sizeof ip, NULL, 0, NI_NUMERICHOST);
1433 dprintf("cvthname(%s)\n", ip);
1436 dprintf("Malformed from address %s\n", gai_strerror(error));
1442 sigemptyset(&nmask);
1443 sigaddset(&nmask, SIGHUP);
1444 sigprocmask(SIG_BLOCK, &nmask, &omask);
1445 error = getnameinfo((struct sockaddr *)f,
1446 ((struct sockaddr *)f)->sa_len,
1447 hname, sizeof hname, NULL, 0, NI_NAMEREQD);
1448 sigprocmask(SIG_SETMASK, &omask, NULL);
1450 dprintf("Host name for your address (%s) unknown\n", ip);
1454 if (hl > 0 && hname[hl-1] == '.')
1456 trimdomain(hname, hl);
1468 domark(int signo __unused)
1475 * Print syslogd errors some place.
1478 logerror(const char *type)
1481 static int recursed = 0;
1483 /* If there's an error while trying to log an error, give up. */
1489 sizeof buf, "syslogd: %s: %s", type, strerror(errno));
1491 (void)snprintf(buf, sizeof buf, "syslogd: %s", type);
1493 dprintf("%s\n", buf);
1494 logmsg(LOG_SYSLOG|LOG_ERR, buf, LocalHostName, ADDDATE);
1503 int was_initialized;
1506 was_initialized = Initialized;
1507 Initialized = 0; /* Don't log SIGCHLDs. */
1508 for (f = Files; f != NULL; f = f->f_next) {
1509 /* flush any pending output */
1511 fprintlog(f, 0, (char *)NULL);
1512 if (f->f_type == F_PIPE && f->f_un.f_pipe.f_pid > 0) {
1513 (void)close(f->f_file);
1514 f->f_un.f_pipe.f_pid = 0;
1517 Initialized = was_initialized;
1519 dprintf("syslogd: exiting on signal %d\n", signo);
1520 (void)snprintf(buf, sizeof(buf), "exiting on signal %d", signo);
1524 STAILQ_FOREACH(fx, &funixes, next)
1525 (void)unlink(fx->name);
1526 pidfile_remove(pfh);
1532 * INIT -- Initialize syslogd from configuration table
1539 struct filed *f, *next, **nextp;
1541 char cline[LINE_MAX];
1542 char prog[NAME_MAX+1];
1543 char host[MAXHOSTNAMELEN];
1544 char oldLocalHostName[MAXHOSTNAMELEN];
1545 char hostMsg[2*MAXHOSTNAMELEN+40];
1546 char bootfileMsg[LINE_MAX];
1551 * Load hostname (may have changed).
1554 (void)strlcpy(oldLocalHostName, LocalHostName,
1555 sizeof(oldLocalHostName));
1556 if (gethostname(LocalHostName, sizeof(LocalHostName)))
1557 err(EX_OSERR, "gethostname() failed");
1558 if ((p = strchr(LocalHostName, '.')) != NULL) {
1566 * Close all open log files.
1569 for (f = Files; f != NULL; f = next) {
1570 /* flush any pending output */
1572 fprintlog(f, 0, (char *)NULL);
1574 switch (f->f_type) {
1579 (void)close(f->f_file);
1582 if (f->f_un.f_pipe.f_pid > 0) {
1583 (void)close(f->f_file);
1584 deadq_enter(f->f_un.f_pipe.f_pid,
1585 f->f_un.f_pipe.f_pname);
1587 f->f_un.f_pipe.f_pid = 0;
1591 if (f->f_program) free(f->f_program);
1592 if (f->f_host) free(f->f_host);
1598 /* open the configuration file */
1599 if ((cf = fopen(ConfFile, "r")) == NULL) {
1600 dprintf("cannot open %s\n", ConfFile);
1601 *nextp = (struct filed *)calloc(1, sizeof(*f));
1602 if (*nextp == NULL) {
1606 cfline("*.ERR\t/dev/console", *nextp, "*", "*");
1607 (*nextp)->f_next = (struct filed *)calloc(1, sizeof(*f));
1608 if ((*nextp)->f_next == NULL) {
1612 cfline("*.PANIC\t*", (*nextp)->f_next, "*", "*");
1618 * Foreach line in the conf table, open that file.
1621 (void)strlcpy(host, "*", sizeof(host));
1622 (void)strlcpy(prog, "*", sizeof(prog));
1623 while (fgets(cline, sizeof(cline), cf) != NULL) {
1625 * check for end-of-section, comments, strip off trailing
1626 * spaces and newline character. #!prog is treated specially:
1627 * following lines apply only to that program.
1629 for (p = cline; isspace(*p); ++p)
1635 if (*p != '!' && *p != '+' && *p != '-')
1638 if (*p == '+' || *p == '-') {
1642 if ((!*p) || (*p == '*')) {
1643 (void)strlcpy(host, "*", sizeof(host));
1648 for (i = 1; i < MAXHOSTNAMELEN - 1; i++) {
1649 if (!isalnum(*p) && *p != '.' && *p != '-'
1650 && *p != ',' && *p != ':' && *p != '%')
1659 while (isspace(*p)) p++;
1660 if ((!*p) || (*p == '*')) {
1661 (void)strlcpy(prog, "*", sizeof(prog));
1664 for (i = 0; i < NAME_MAX; i++) {
1665 if (!isprint(p[i]) || isspace(p[i]))
1672 for (p = cline + 1; *p != '\0'; p++) {
1675 if (*(p - 1) == '\\') {
1683 for (i = strlen(cline) - 1; i >= 0 && isspace(cline[i]); i--)
1685 f = (struct filed *)calloc(1, sizeof(*f));
1692 cfline(cline, f, prog, host);
1695 /* close the configuration file */
1702 for (f = Files; f; f = f->f_next) {
1703 for (i = 0; i <= LOG_NFACILITIES; i++)
1704 if (f->f_pmask[i] == INTERNAL_NOPRI)
1707 printf("%d ", f->f_pmask[i]);
1708 printf("%s: ", TypeNames[f->f_type]);
1709 switch (f->f_type) {
1711 printf("%s", f->f_un.f_fname);
1716 printf("%s%s", _PATH_DEV, f->f_un.f_fname);
1720 port = (int)ntohs(((struct sockaddr_in *)
1721 (f->f_un.f_forw.f_addr->ai_addr))->sin_port);
1724 f->f_un.f_forw.f_hname, port);
1726 printf("%s", f->f_un.f_forw.f_hname);
1731 printf("%s", f->f_un.f_pipe.f_pname);
1735 for (i = 0; i < MAXUNAMES && *f->f_un.f_uname[i]; i++)
1736 printf("%s, ", f->f_un.f_uname[i]);
1740 printf(" (%s)", f->f_program);
1745 logmsg(LOG_SYSLOG|LOG_INFO, "syslogd: restart", LocalHostName, ADDDATE);
1746 dprintf("syslogd: restarted\n");
1748 * Log a change in hostname, but only on a restart.
1750 if (signo != 0 && strcmp(oldLocalHostName, LocalHostName) != 0) {
1751 (void)snprintf(hostMsg, sizeof(hostMsg),
1752 "syslogd: hostname changed, \"%s\" to \"%s\"",
1753 oldLocalHostName, LocalHostName);
1754 logmsg(LOG_SYSLOG|LOG_INFO, hostMsg, LocalHostName, ADDDATE);
1755 dprintf("%s\n", hostMsg);
1758 * Log the kernel boot file if we aren't going to use it as
1759 * the prefix, and if this is *not* a restart.
1761 if (signo == 0 && !use_bootfile) {
1762 (void)snprintf(bootfileMsg, sizeof(bootfileMsg),
1763 "syslogd: kernel boot file is %s", bootfile);
1764 logmsg(LOG_KERN|LOG_INFO, bootfileMsg, LocalHostName, ADDDATE);
1765 dprintf("%s\n", bootfileMsg);
1770 * Crack a configuration file line
1773 cfline(const char *line, struct filed *f, const char *prog, const char *host)
1775 struct addrinfo hints, *res;
1776 int error, i, pri, syncfile;
1779 char buf[MAXLINE], ebuf[100];
1781 dprintf("cfline(\"%s\", f, \"%s\", \"%s\")\n", line, prog, host);
1783 errno = 0; /* keep strerror() stuff out of logerror messages */
1785 /* clear out file entry */
1786 memset(f, 0, sizeof(*f));
1787 for (i = 0; i <= LOG_NFACILITIES; i++)
1788 f->f_pmask[i] = INTERNAL_NOPRI;
1790 /* save hostname if any */
1791 if (host && *host == '*')
1796 f->f_host = strdup(host);
1797 if (f->f_host == NULL) {
1801 hl = strlen(f->f_host);
1802 if (hl > 0 && f->f_host[hl-1] == '.')
1803 f->f_host[--hl] = '\0';
1804 trimdomain(f->f_host, hl);
1807 /* save program name if any */
1808 if (prog && *prog == '*')
1811 f->f_program = strdup(prog);
1812 if (f->f_program == NULL) {
1818 /* scan through the list of selectors */
1819 for (p = line; *p && *p != '\t' && *p != ' ';) {
1824 /* find the end of this facility name list */
1825 for (q = p; *q && *q != '\t' && *q != ' ' && *q++ != '.'; )
1828 /* get the priority comparison */
1856 /* collect priority name */
1857 for (bp = buf; *q && !strchr("\t,; ", *q); )
1862 while (strchr(",;", *q))
1865 /* decode priority name */
1868 pri_cmp = PRI_LT | PRI_EQ | PRI_GT;
1870 /* Ignore trailing spaces. */
1871 for (i = strlen(buf) - 1; i >= 0 && buf[i] == ' '; i--)
1874 pri = decode(buf, prioritynames);
1877 (void)snprintf(ebuf, sizeof ebuf,
1878 "unknown priority name \"%s\"", buf);
1884 pri_cmp = (UniquePriority)
1889 pri_cmp ^= PRI_LT | PRI_EQ | PRI_GT;
1891 /* scan facilities */
1892 while (*p && !strchr("\t.; ", *p)) {
1893 for (bp = buf; *p && !strchr("\t,;. ", *p); )
1898 for (i = 0; i < LOG_NFACILITIES; i++) {
1899 f->f_pmask[i] = pri;
1900 f->f_pcmp[i] = pri_cmp;
1903 i = decode(buf, facilitynames);
1906 (void)snprintf(ebuf, sizeof ebuf,
1907 "unknown facility name \"%s\"",
1912 f->f_pmask[i >> 3] = pri;
1913 f->f_pcmp[i >> 3] = pri_cmp;
1915 while (*p == ',' || *p == ' ')
1922 /* skip to action part */
1923 while (*p == '\t' || *p == ' ')
1938 * scan forward to see if there is a port defined.
1939 * so we can't use strlcpy..
1941 i = sizeof(f->f_un.f_forw.f_hname);
1942 tp = f->f_un.f_forw.f_hname;
1946 * an ipv6 address should start with a '[' in that case
1947 * we should scan for a ']'
1953 while (*p && (*p != endkey) && (i-- > 0)) {
1956 if (endkey == ']' && *p == endkey)
1960 /* See if we copied a domain and have a port */
1966 memset(&hints, 0, sizeof(hints));
1967 hints.ai_family = family;
1968 hints.ai_socktype = SOCK_DGRAM;
1969 error = getaddrinfo(f->f_un.f_forw.f_hname,
1970 p ? p : "syslog", &hints, &res);
1972 logerror(gai_strerror(error));
1975 f->f_un.f_forw.f_addr = res;
1980 if ((f->f_file = open(p, logflags, 0600)) < 0) {
1981 f->f_type = F_UNUSED;
1986 f->f_flags |= FFLAG_SYNC;
1987 if (isatty(f->f_file)) {
1988 if (strcmp(p, ctty) == 0)
1989 f->f_type = F_CONSOLE;
1992 (void)strlcpy(f->f_un.f_fname, p + sizeof(_PATH_DEV) - 1,
1993 sizeof(f->f_un.f_fname));
1995 (void)strlcpy(f->f_un.f_fname, p, sizeof(f->f_un.f_fname));
2001 f->f_un.f_pipe.f_pid = 0;
2002 (void)strlcpy(f->f_un.f_pipe.f_pname, p + 1,
2003 sizeof(f->f_un.f_pipe.f_pname));
2012 for (i = 0; i < MAXUNAMES && *p; i++) {
2013 for (q = p; *q && *q != ','; )
2015 (void)strncpy(f->f_un.f_uname[i], p, MAXLOGNAME - 1);
2016 if ((q - p) >= MAXLOGNAME)
2017 f->f_un.f_uname[i][MAXLOGNAME - 1] = '\0';
2019 f->f_un.f_uname[i][q - p] = '\0';
2020 while (*q == ',' || *q == ' ')
2024 f->f_type = F_USERS;
2031 * Decode a symbolic name to a numeric value
2034 decode(const char *name, CODE *codetab)
2040 return (atoi(name));
2042 for (p = buf; *name && p < &buf[sizeof(buf) - 1]; p++, name++) {
2044 *p = tolower(*name);
2049 for (c = codetab; c->c_name; c++)
2050 if (!strcmp(buf, c->c_name))
2062 now = time((time_t *)NULL);
2063 MarkSeq += TIMERINTVL;
2064 if (MarkSeq >= MarkInterval) {
2065 logmsg(LOG_INFO, "-- MARK --",
2066 LocalHostName, ADDDATE|MARK);
2070 for (f = Files; f; f = f->f_next) {
2071 if (f->f_prevcount && now >= REPEATTIME(f)) {
2072 dprintf("flush %s: repeated %d times, %d sec.\n",
2073 TypeNames[f->f_type], f->f_prevcount,
2074 repeatinterval[f->f_repeatcount]);
2075 fprintlog(f, 0, (char *)NULL);
2080 /* Walk the dead queue, and see if we should signal somebody. */
2081 for (q = TAILQ_FIRST(&deadq_head); q != NULL; q = next) {
2082 next = TAILQ_NEXT(q, dq_entries);
2084 switch (q->dq_timeout) {
2086 /* Already signalled once, try harder now. */
2087 if (kill(q->dq_pid, SIGKILL) != 0)
2088 (void)deadq_remove(q->dq_pid);
2093 * Timed out on dead queue, send terminate
2094 * signal. Note that we leave the removal
2095 * from the dead queue to reapchild(), which
2096 * will also log the event (unless the process
2097 * didn't even really exist, in case we simply
2098 * drop it from the dead queue).
2100 if (kill(q->dq_pid, SIGTERM) != 0)
2101 (void)deadq_remove(q->dq_pid);
2109 (void)alarm(TIMERINTVL);
2113 * fork off and become a daemon, but wait for the child to come online
2114 * before returing to the parent, or we get disk thrashing at boot etc.
2115 * Set a timer so we don't hang forever if it wedges.
2118 waitdaemon(int nochdir, int noclose, int maxwait)
2122 pid_t pid, childpid;
2124 switch (childpid = fork()) {
2130 signal(SIGALRM, timedout);
2132 while ((pid = wait3(&status, 0, NULL)) != -1) {
2133 if (WIFEXITED(status))
2134 errx(1, "child pid %d exited with return code %d",
2135 pid, WEXITSTATUS(status));
2136 if (WIFSIGNALED(status))
2137 errx(1, "child pid %d exited on signal %d%s",
2138 pid, WTERMSIG(status),
2139 WCOREDUMP(status) ? " (core dumped)" :
2141 if (pid == childpid) /* it's gone... */
2153 if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
2154 (void)dup2(fd, STDIN_FILENO);
2155 (void)dup2(fd, STDOUT_FILENO);
2156 (void)dup2(fd, STDERR_FILENO);
2164 * We get a SIGALRM from the child when it's running and finished doing it's
2165 * fsync()'s or O_SYNC writes for all the boot messages.
2167 * We also get a signal from the kernel if the timer expires, so check to
2168 * see what happened.
2171 timedout(int sig __unused)
2175 signal(SIGALRM, SIG_DFL);
2177 errx(1, "timed out waiting for child");
2183 * Add `s' to the list of allowable peer addresses to accept messages
2186 * `s' is a string in the form:
2188 * [*]domainname[:{servicename|portnumber|*}]
2192 * netaddr/maskbits[:{servicename|portnumber|*}]
2194 * Returns -1 on error, 0 if the argument was valid.
2200 struct allowedpeer ap;
2203 struct addrinfo hints, *res;
2204 struct in_addr *addrp, *maskp;
2207 u_int32_t *addr6p, *mask6p;
2209 char ip[NI_MAXHOST];
2212 if (*s != '[' || (cp1 = strchr(s + 1, ']')) == NULL)
2215 if ((cp1 = strrchr(cp1, ':'))) {
2216 /* service/port provided */
2218 if (strlen(cp1) == 1 && *cp1 == '*')
2219 /* any port allowed */
2221 else if ((se = getservbyname(cp1, "udp"))) {
2222 ap.port = ntohs(se->s_port);
2224 ap.port = strtol(cp1, &cp2, 0);
2226 return (-1); /* port not numeric */
2229 if ((se = getservbyname("syslog", "udp")))
2230 ap.port = ntohs(se->s_port);
2232 /* sanity, should not happen */
2236 if ((cp1 = strchr(s, '/')) != NULL &&
2237 strspn(cp1 + 1, "0123456789") == strlen(cp1 + 1)) {
2239 if ((masklen = atoi(cp1 + 1)) < 0)
2244 cp2 = s + strlen(s) - 1;
2255 memset(&hints, 0, sizeof(hints));
2256 hints.ai_family = PF_UNSPEC;
2257 hints.ai_socktype = SOCK_DGRAM;
2258 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
2259 if (getaddrinfo(s, NULL, &hints, &res) == 0) {
2261 memcpy(&ap.a_addr, res->ai_addr, res->ai_addrlen);
2262 memset(&ap.a_mask, 0, sizeof(ap.a_mask));
2263 ap.a_mask.ss_family = res->ai_family;
2264 if (res->ai_family == AF_INET) {
2265 ap.a_mask.ss_len = sizeof(struct sockaddr_in);
2266 maskp = &((struct sockaddr_in *)&ap.a_mask)->sin_addr;
2267 addrp = &((struct sockaddr_in *)&ap.a_addr)->sin_addr;
2269 /* use default netmask */
2270 if (IN_CLASSA(ntohl(addrp->s_addr)))
2271 maskp->s_addr = htonl(IN_CLASSA_NET);
2272 else if (IN_CLASSB(ntohl(addrp->s_addr)))
2273 maskp->s_addr = htonl(IN_CLASSB_NET);
2275 maskp->s_addr = htonl(IN_CLASSC_NET);
2276 } else if (masklen <= 32) {
2277 /* convert masklen to netmask */
2281 maskp->s_addr = htonl(~((1 << (32 - masklen)) - 1));
2286 /* Lose any host bits in the network number. */
2287 addrp->s_addr &= maskp->s_addr;
2290 else if (res->ai_family == AF_INET6 && masklen <= 128) {
2291 ap.a_mask.ss_len = sizeof(struct sockaddr_in6);
2294 mask6p = (u_int32_t *)&((struct sockaddr_in6 *)&ap.a_mask)->sin6_addr;
2295 /* convert masklen to netmask */
2296 while (masklen > 0) {
2298 *mask6p = htonl(~(0xffffffff >> masklen));
2301 *mask6p++ = 0xffffffff;
2304 /* Lose any host bits in the network number. */
2305 mask6p = (u_int32_t *)&((struct sockaddr_in6 *)&ap.a_mask)->sin6_addr;
2306 addr6p = (u_int32_t *)&((struct sockaddr_in6 *)&ap.a_addr)->sin6_addr;
2307 for (i = 0; i < 4; i++)
2308 addr6p[i] &= mask6p[i];
2317 /* arg `s' is domain name */
2331 printf("allowaddr: rule %d: ", NumAllowed);
2333 printf("numeric, ");
2334 getnameinfo((struct sockaddr *)&ap.a_addr,
2335 ((struct sockaddr *)&ap.a_addr)->sa_len,
2336 ip, sizeof ip, NULL, 0, NI_NUMERICHOST);
2337 printf("addr = %s, ", ip);
2338 getnameinfo((struct sockaddr *)&ap.a_mask,
2339 ((struct sockaddr *)&ap.a_mask)->sa_len,
2340 ip, sizeof ip, NULL, 0, NI_NUMERICHOST);
2341 printf("mask = %s; ", ip);
2343 printf("domainname = %s; ", ap.a_name);
2345 printf("port = %d\n", ap.port);
2348 if ((AllowedPeers = realloc(AllowedPeers,
2349 ++NumAllowed * sizeof(struct allowedpeer)))
2351 logerror("realloc");
2354 memcpy(&AllowedPeers[NumAllowed - 1], &ap, sizeof(struct allowedpeer));
2359 * Validate that the remote peer has permission to log to us.
2362 validate(struct sockaddr *sa, const char *hname)
2366 char *cp, name[NI_MAXHOST], ip[NI_MAXHOST], port[NI_MAXSERV];
2367 struct allowedpeer *ap;
2368 struct sockaddr_in *sin4, *a4p = NULL, *m4p = NULL;
2371 struct sockaddr_in6 *sin6, *a6p = NULL, *m6p = NULL;
2373 struct addrinfo hints, *res;
2376 if (NumAllowed == 0)
2377 /* traditional behaviour, allow everything */
2380 (void)strlcpy(name, hname, sizeof(name));
2381 memset(&hints, 0, sizeof(hints));
2382 hints.ai_family = PF_UNSPEC;
2383 hints.ai_socktype = SOCK_DGRAM;
2384 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
2385 if (getaddrinfo(name, NULL, &hints, &res) == 0)
2387 else if (strchr(name, '.') == NULL) {
2388 strlcat(name, ".", sizeof name);
2389 strlcat(name, LocalDomain, sizeof name);
2391 if (getnameinfo(sa, sa->sa_len, ip, sizeof ip, port, sizeof port,
2392 NI_NUMERICHOST | NI_NUMERICSERV) != 0)
2393 return (0); /* for safety, should not occur */
2394 dprintf("validate: dgram from IP %s, port %s, name %s;\n",
2398 /* now, walk down the list */
2399 for (i = 0, ap = AllowedPeers; i < NumAllowed; i++, ap++) {
2400 if (ap->port != 0 && ap->port != sport) {
2401 dprintf("rejected in rule %d due to port mismatch.\n", i);
2405 if (ap->isnumeric) {
2406 if (ap->a_addr.ss_family != sa->sa_family) {
2407 dprintf("rejected in rule %d due to address family mismatch.\n", i);
2410 if (ap->a_addr.ss_family == AF_INET) {
2411 sin4 = (struct sockaddr_in *)sa;
2412 a4p = (struct sockaddr_in *)&ap->a_addr;
2413 m4p = (struct sockaddr_in *)&ap->a_mask;
2414 if ((sin4->sin_addr.s_addr & m4p->sin_addr.s_addr)
2415 != a4p->sin_addr.s_addr) {
2416 dprintf("rejected in rule %d due to IP mismatch.\n", i);
2421 else if (ap->a_addr.ss_family == AF_INET6) {
2422 sin6 = (struct sockaddr_in6 *)sa;
2423 a6p = (struct sockaddr_in6 *)&ap->a_addr;
2424 m6p = (struct sockaddr_in6 *)&ap->a_mask;
2425 if (a6p->sin6_scope_id != 0 &&
2426 sin6->sin6_scope_id != a6p->sin6_scope_id) {
2427 dprintf("rejected in rule %d due to scope mismatch.\n", i);
2431 for (j = 0; j < 16; j += 4) {
2432 if ((*(u_int32_t *)&sin6->sin6_addr.s6_addr[j] & *(u_int32_t *)&m6p->sin6_addr.s6_addr[j])
2433 != *(u_int32_t *)&a6p->sin6_addr.s6_addr[j]) {
2439 dprintf("rejected in rule %d due to IP mismatch.\n", i);
2450 /* allow wildmatch */
2453 if (l2 > l1 || memcmp(cp, &name[l1 - l2], l2) != 0) {
2454 dprintf("rejected in rule %d due to name mismatch.\n", i);
2460 if (l2 != l1 || memcmp(cp, name, l1) != 0) {
2461 dprintf("rejected in rule %d due to name mismatch.\n", i);
2466 dprintf("accepted in rule %d.\n", i);
2467 return (1); /* hooray! */
2473 * Fairly similar to popen(3), but returns an open descriptor, as
2474 * opposed to a FILE *.
2477 p_open(const char *prog, pid_t *rpid)
2479 int pfd[2], nulldesc;
2481 sigset_t omask, mask;
2482 char *argv[4]; /* sh -c cmd NULL */
2485 if (pipe(pfd) == -1)
2487 if ((nulldesc = open(_PATH_DEVNULL, O_RDWR)) == -1)
2488 /* we are royally screwed anyway */
2492 sigaddset(&mask, SIGALRM);
2493 sigaddset(&mask, SIGHUP);
2494 sigprocmask(SIG_BLOCK, &mask, &omask);
2495 switch ((pid = fork())) {
2497 sigprocmask(SIG_SETMASK, &omask, 0);
2502 argv[0] = strdup("sh");
2503 argv[1] = strdup("-c");
2504 argv[2] = strdup(prog);
2506 if (argv[0] == NULL || argv[1] == NULL || argv[2] == NULL) {
2512 (void)setsid(); /* Avoid catching SIGHUPs. */
2515 * Throw away pending signals, and reset signal
2516 * behaviour to standard values.
2518 signal(SIGALRM, SIG_IGN);
2519 signal(SIGHUP, SIG_IGN);
2520 sigprocmask(SIG_SETMASK, &omask, 0);
2521 signal(SIGPIPE, SIG_DFL);
2522 signal(SIGQUIT, SIG_DFL);
2523 signal(SIGALRM, SIG_DFL);
2524 signal(SIGHUP, SIG_DFL);
2526 dup2(pfd[0], STDIN_FILENO);
2527 dup2(nulldesc, STDOUT_FILENO);
2528 dup2(nulldesc, STDERR_FILENO);
2531 (void)execvp(_PATH_BSHELL, argv);
2535 sigprocmask(SIG_SETMASK, &omask, 0);
2539 * Avoid blocking on a hung pipe. With O_NONBLOCK, we are
2540 * supposed to get an EWOULDBLOCK on writev(2), which is
2541 * caught by the logic above anyway, which will in turn close
2542 * the pipe, and fork a new logging subprocess if necessary.
2543 * The stale subprocess will be killed some time later unless
2544 * it terminated itself due to closing its input pipe (so we
2545 * get rid of really dead puppies).
2547 if (fcntl(pfd[1], F_SETFL, O_NONBLOCK) == -1) {
2549 (void)snprintf(errmsg, sizeof errmsg,
2550 "Warning: cannot change pipe to PID %d to "
2551 "non-blocking behaviour.",
2560 deadq_enter(pid_t pid, const char *name)
2566 * Be paranoid, if we can't signal the process, don't enter it
2567 * into the dead queue (perhaps it's already dead). If possible,
2568 * we try to fetch and log the child's status.
2570 if (kill(pid, 0) != 0) {
2571 if (waitpid(pid, &status, WNOHANG) > 0)
2572 log_deadchild(pid, status, name);
2576 p = malloc(sizeof(struct deadq_entry));
2583 p->dq_timeout = DQ_TIMO_INIT;
2584 TAILQ_INSERT_TAIL(&deadq_head, p, dq_entries);
2588 deadq_remove(pid_t pid)
2592 TAILQ_FOREACH(q, &deadq_head, dq_entries) {
2593 if (q->dq_pid == pid) {
2594 TAILQ_REMOVE(&deadq_head, q, dq_entries);
2604 log_deadchild(pid_t pid, int status, const char *name)
2610 errno = 0; /* Keep strerror() stuff out of logerror messages. */
2611 if (WIFSIGNALED(status)) {
2612 reason = "due to signal";
2613 code = WTERMSIG(status);
2615 reason = "with status";
2616 code = WEXITSTATUS(status);
2620 (void)snprintf(buf, sizeof buf,
2621 "Logging subprocess %d (%s) exited %s %d.",
2622 pid, name, reason, code);
2627 socksetup(int af, char *bindhostname)
2629 struct addrinfo hints, *res, *r;
2630 const char *bindservice;
2632 int error, maxs, *s, *socks;
2635 * We have to handle this case for backwards compatibility:
2636 * If there are two (or more) colons but no '[' and ']',
2637 * assume this is an inet6 address without a service.
2639 bindservice = "syslog";
2640 if (bindhostname != NULL) {
2642 if (*bindhostname == '[' &&
2643 (cp = strchr(bindhostname + 1, ']')) != NULL) {
2646 if (cp[1] == ':' && cp[2] != '\0')
2647 bindservice = cp + 2;
2650 cp = strchr(bindhostname, ':');
2651 if (cp != NULL && strchr(cp + 1, ':') == NULL) {
2654 bindservice = cp + 1;
2655 if (cp == bindhostname)
2656 bindhostname = NULL;
2663 memset(&hints, 0, sizeof(hints));
2664 hints.ai_flags = AI_PASSIVE;
2665 hints.ai_family = af;
2666 hints.ai_socktype = SOCK_DGRAM;
2667 error = getaddrinfo(bindhostname, bindservice, &hints, &res);
2669 logerror(gai_strerror(error));
2674 /* Count max number of sockets we may open */
2675 for (maxs = 0, r = res; r; r = r->ai_next, maxs++);
2676 socks = malloc((maxs+1) * sizeof(int));
2677 if (socks == NULL) {
2678 logerror("couldn't allocate memory for sockets");
2682 *socks = 0; /* num of sockets counter at start of array */
2684 for (r = res; r; r = r->ai_next) {
2686 *s = socket(r->ai_family, r->ai_socktype, r->ai_protocol);
2692 if (r->ai_family == AF_INET6) {
2693 if (setsockopt(*s, IPPROTO_IPV6, IPV6_V6ONLY,
2694 (char *)&on, sizeof (on)) < 0) {
2695 logerror("setsockopt");
2701 if (setsockopt(*s, SOL_SOCKET, SO_REUSEADDR,
2702 (char *)&on, sizeof (on)) < 0) {
2703 logerror("setsockopt");
2708 * RFC 3164 recommends that client side message
2709 * should come from the privileged syslogd port.
2711 * If the system administrator choose not to obey
2712 * this, we can skip the bind() step so that the
2713 * system will choose a port for us.
2716 if (bind(*s, r->ai_addr, r->ai_addrlen) < 0) {
2746 socklen_t slen, len;
2748 if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &len, &slen) == 0) {
2750 setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &len, slen);