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 MAXLINE /* maximum saved line length */
73 #define DEFUPRI (LOG_USER|LOG_NOTICE)
74 #define DEFSPRI (LOG_KERN|LOG_CRIT)
75 #define TIMERINTVL 30 /* interval for checking flush, mark */
76 #define TTYMSGTIME 1 /* timeout passed to ttymsg */
77 #define RCVBUF_MINSIZE (80 * 1024) /* minimum size of dgram rcv buffer */
79 #include <sys/param.h>
80 #include <sys/ioctl.h>
84 #include <sys/socket.h>
85 #include <sys/queue.h>
89 #include <sys/resource.h>
90 #include <sys/syslimits.h>
91 #include <sys/types.h>
93 #include <netinet/in.h>
95 #include <arpa/inet.h>
108 #include <sysexits.h>
112 #include "pathnames.h"
116 #include <sys/syslog.h>
118 const char *ConfFile = _PATH_LOGCONF;
119 const char *PidFile = _PATH_LOGPID;
120 const char ctty[] = _PATH_CONSOLE;
122 #define dprintf if (Debug) printf
124 #define MAXUNAMES 20 /* maximum number of user names */
127 * List of hosts for binding.
129 static STAILQ_HEAD(, host) hqueue;
132 STAILQ_ENTRY(host) next;
137 * We have two default sockets, one with 666 permissions,
138 * and one for privileged programs.
144 STAILQ_ENTRY(funix) next;
146 struct funix funix_secure = { -1, _PATH_LOG_PRIV, S_IRUSR | S_IWUSR,
148 struct funix funix_default = { -1, _PATH_LOG, DEFFILEMODE,
151 STAILQ_HEAD(, funix) funixes = { &funix_default,
152 &(funix_secure.next.stqe_next) };
158 #define IGN_CONS 0x001 /* don't print on console */
159 #define SYNC_FILE 0x002 /* do fsync on file after printing */
160 #define ADDDATE 0x004 /* add a date to the message */
161 #define MARK 0x008 /* this message is a mark */
162 #define ISKERNEL 0x010 /* kernel generated message */
165 * This structure represents the files that will have log
167 * We require f_file to be valid if f_type is F_FILE, F_CONSOLE, F_TTY
168 * or if f_type if F_PIPE and f_pid > 0.
172 struct filed *f_next; /* next in linked list */
173 short f_type; /* entry type, see below */
174 short f_file; /* file descriptor */
175 time_t f_time; /* time this was last written */
176 char *f_host; /* host from which to recd. */
177 u_char f_pmask[LOG_NFACILITIES+1]; /* priority mask */
178 u_char f_pcmp[LOG_NFACILITIES+1]; /* compare priority */
182 char *f_program; /* program this applies to */
184 char f_uname[MAXUNAMES][MAXLOGNAME];
186 char f_hname[MAXHOSTNAMELEN];
187 struct addrinfo *f_addr;
189 } f_forw; /* forwarding address */
190 char f_fname[MAXPATHLEN];
192 char f_pname[MAXPATHLEN];
196 char f_prevline[MAXSVLINE]; /* last message logged */
197 char f_lasttime[16]; /* time of last occurrence */
198 char f_prevhost[MAXHOSTNAMELEN]; /* host from which recd. */
199 int f_prevpri; /* pri of f_prevline */
200 int f_prevlen; /* length of f_prevline */
201 int f_prevcount; /* repetition cnt of prevline */
202 u_int f_repeatcount; /* number of "repeated" msgs */
203 int f_flags; /* file-specific flags */
204 #define FFLAG_SYNC 0x01
205 #define FFLAG_NEEDSYNC 0x02
209 * Queue of about-to-be dead processes we should watch out for.
212 TAILQ_HEAD(stailhead, deadq_entry) deadq_head;
213 struct stailhead *deadq_headp;
218 TAILQ_ENTRY(deadq_entry) dq_entries;
222 * The timeout to apply to processes waiting on the dead queue. Unit
223 * of measure is `mark intervals', i.e. 20 minutes by default.
224 * Processes on the dead queue will be terminated after that time.
227 #define DQ_TIMO_INIT 2
229 typedef struct deadq_entry *dq_t;
233 * Struct to hold records of network addresses that are allowed to log
241 struct sockaddr_storage addr;
242 struct sockaddr_storage mask;
246 #define a_addr u.numeric.addr
247 #define a_mask u.numeric.mask
248 #define a_name u.name
253 * Intervals at which we flush out "message repeated" messages,
254 * in seconds after previous message is logged. After each flush,
255 * we move to the next interval until we reach the largest.
257 int repeatinterval[] = { 30, 120, 600 }; /* # of secs before flush */
258 #define MAXREPEAT ((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1)
259 #define REPEATTIME(f) ((f)->f_time + repeatinterval[(f)->f_repeatcount])
260 #define BACKOFF(f) { if (++(f)->f_repeatcount > MAXREPEAT) \
261 (f)->f_repeatcount = MAXREPEAT; \
264 /* values for f_type */
265 #define F_UNUSED 0 /* unused entry */
266 #define F_FILE 1 /* regular file */
267 #define F_TTY 2 /* terminal */
268 #define F_CONSOLE 3 /* console terminal */
269 #define F_FORW 4 /* remote machine */
270 #define F_USERS 5 /* list of users */
271 #define F_WALL 6 /* everyone logged on */
272 #define F_PIPE 7 /* pipe to program */
274 const char *TypeNames[8] = {
275 "UNUSED", "FILE", "TTY", "CONSOLE",
276 "FORW", "USERS", "WALL", "PIPE"
279 static struct filed *Files; /* Log files that we write to */
280 static struct filed consfile; /* Console */
282 static int Debug; /* debug flag */
283 static int Foreground = 0; /* Run in foreground, instead of daemonizing */
284 static int resolve = 1; /* resolve hostname */
285 static char LocalHostName[MAXHOSTNAMELEN]; /* our hostname */
286 static const char *LocalDomain; /* our local domain name */
287 static int *finet; /* Internet datagram sockets */
288 static int fklog = -1; /* /dev/klog */
289 static int Initialized; /* set when we have initialized ourselves */
290 static int MarkInterval = 20 * 60; /* interval between marks in seconds */
291 static int MarkSeq; /* mark sequence number */
292 static int NoBind; /* don't bind() as suggested by RFC 3164 */
293 static int SecureMode; /* when true, receive only unix domain socks */
295 static int family = PF_UNSPEC; /* protocol family (IPv4, IPv6 or both) */
297 static int family = PF_INET; /* protocol family (IPv4 only) */
299 static int mask_C1 = 1; /* mask characters from 0x80 - 0x9F */
300 static int send_to_all; /* send message to all IPv4/IPv6 addresses */
301 static int use_bootfile; /* log entire bootfile for every kern msg */
302 static int no_compress; /* don't compress messages (1=pipes, 2=all) */
303 static int logflags = O_WRONLY|O_APPEND; /* flags used to open log files */
305 static char bootfile[MAXLINE+1]; /* booted kernel file */
307 struct allowedpeer *AllowedPeers; /* List of allowed peers */
308 static int NumAllowed; /* Number of entries in AllowedPeers */
309 static int RemoteAddDate; /* Always set the date on remote messages */
311 static int UniquePriority; /* Only log specified priority? */
312 static int LogFacPri; /* Put facility and priority in log message: */
313 /* 0=no, 1=numeric, 2=names */
314 static int KeepKernFac; /* Keep remotely logged kernel facility */
315 static int needdofsync = 0; /* Are any file(s) waiting to be fsynced? */
316 static struct pidfh *pfh;
318 volatile sig_atomic_t MarkSet, WantDie;
320 static int allowaddr(char *);
321 static void cfline(const char *, struct filed *,
322 const char *, const char *);
323 static const char *cvthname(struct sockaddr *);
324 static void deadq_enter(pid_t, const char *);
325 static int deadq_remove(pid_t);
326 static int decode(const char *, const CODE *);
327 static void die(int) __dead2;
328 static void dodie(int);
329 static void dofsync(void);
330 static void domark(int);
331 static void fprintlog(struct filed *, int, const char *);
332 static int *socksetup(int, char *);
333 static void init(int);
334 static void logerror(const char *);
335 static void logmsg(int, const char *, const char *, int);
336 static void log_deadchild(pid_t, int, const char *);
337 static void markit(void);
338 static int skip_message(const char *, const char *, int);
339 static void printline(const char *, char *, int);
340 static void printsys(char *);
341 static int p_open(const char *, pid_t *);
342 static void readklog(void);
343 static void reapchild(int);
344 static const char *ttymsg_check(struct iovec *, int, char *, int);
345 static void usage(void);
346 static int validate(struct sockaddr *, const char *);
347 static void unmapped(struct sockaddr *);
348 static void wallmsg(struct filed *, struct iovec *, const int iovlen);
349 static int waitdaemon(int, int, int);
350 static void timedout(int);
351 static void increase_rcvbuf(int);
354 close_filed(struct filed *f)
357 if (f == NULL || f->f_file == -1)
360 (void)close(f->f_file);
362 f->f_type = F_UNUSED;
366 main(int argc, char *argv[])
368 int ch, i, fdsrmax = 0, l;
369 struct sockaddr_un sunx, fromunix;
370 struct sockaddr_storage frominet;
372 char line[MAXLINE + 1];
374 struct timeval tv, *tvp;
375 struct sigaction sact;
377 struct funix *fx, *fx1;
379 pid_t ppid = 1, spid;
382 if (madvise(NULL, 0, MADV_PROTECT) != 0)
383 dprintf("madvise() failed: %s\n", strerror(errno));
385 STAILQ_INIT(&hqueue);
387 while ((ch = getopt(argc, argv, "468Aa:b:cCdf:Fkl:m:nNop:P:sS:Tuv"))
404 case 'a': /* allow specific network addresses only */
405 if (allowaddr(optarg) == -1)
410 if ((host = malloc(sizeof(struct host))) == NULL)
411 err(1, "malloc failed");
413 STAILQ_INSERT_TAIL(&hqueue, host, next);
422 case 'd': /* debug */
425 case 'f': /* configuration file */
428 case 'F': /* run in foreground instead of daemon */
431 case 'k': /* keep remote kern fac */
440 if (optarg[0] == '/') {
443 } else if ((name = strchr(optarg, ':')) != NULL) {
446 errx(1, "socket name must be absolute "
448 if (isdigit(*optarg)) {
449 perml = strtol(optarg, &ep, 8);
450 if (*ep || perml < 0 ||
451 perml & ~(S_IRWXU|S_IRWXG|S_IRWXO))
452 errx(1, "invalid mode %s, exiting",
454 mode = (mode_t )perml;
456 errx(1, "invalid mode %s, exiting",
458 } else /* doesn't begin with '/', and no ':' */
459 errx(1, "can't parse path %s", optarg);
461 if (strlen(name) >= sizeof(sunx.sun_path))
462 errx(1, "%s path too long, exiting", name);
463 if ((fx = malloc(sizeof(struct funix))) == NULL)
464 err(1, "malloc failed");
468 STAILQ_INSERT_TAIL(&funixes, fx, next);
471 case 'm': /* mark interval */
472 MarkInterval = atoi(optarg) * 60;
485 if (strlen(optarg) >= sizeof(sunx.sun_path))
486 errx(1, "%s path too long, exiting", optarg);
487 funix_default.name = optarg;
489 case 'P': /* path for alt. PID */
492 case 's': /* no network mode */
495 case 'S': /* path for privileged originator */
496 if (strlen(optarg) >= sizeof(sunx.sun_path))
497 errx(1, "%s path too long, exiting", optarg);
498 funix_secure.name = optarg;
503 case 'u': /* only log specified priority */
506 case 'v': /* log facility and priority */
512 if ((argc -= optind) != 0)
515 pfh = pidfile_open(PidFile, 0600, &spid);
518 errx(1, "syslogd already running, pid: %d", spid);
519 warn("cannot open pid file");
522 if ((!Foreground) && (!Debug)) {
523 ppid = waitdaemon(0, 0, 30);
525 warn("could not become daemon");
536 consfile.f_type = F_CONSOLE;
537 (void)strlcpy(consfile.f_un.f_fname, ctty + sizeof _PATH_DEV - 1,
538 sizeof(consfile.f_un.f_fname));
539 (void)strlcpy(bootfile, getbootfile(), sizeof(bootfile));
540 (void)signal(SIGTERM, dodie);
541 (void)signal(SIGINT, Debug ? dodie : SIG_IGN);
542 (void)signal(SIGQUIT, Debug ? dodie : SIG_IGN);
544 * We don't want the SIGCHLD and SIGHUP handlers to interfere
545 * with each other; they are likely candidates for being called
546 * simultaneously (SIGHUP closes pipe descriptor, process dies,
550 sigaddset(&mask, SIGHUP);
551 sact.sa_handler = reapchild;
553 sact.sa_flags = SA_RESTART;
554 (void)sigaction(SIGCHLD, &sact, NULL);
555 (void)signal(SIGALRM, domark);
556 (void)signal(SIGPIPE, SIG_IGN); /* We'll catch EPIPE instead. */
557 (void)alarm(TIMERINTVL);
559 TAILQ_INIT(&deadq_head);
562 #define SUN_LEN(unp) (strlen((unp)->sun_path) + 2)
564 STAILQ_FOREACH_SAFE(fx, &funixes, next, fx1) {
565 (void)unlink(fx->name);
566 memset(&sunx, 0, sizeof(sunx));
567 sunx.sun_family = AF_LOCAL;
568 (void)strlcpy(sunx.sun_path, fx->name, sizeof(sunx.sun_path));
569 fx->s = socket(PF_LOCAL, SOCK_DGRAM, 0);
571 bind(fx->s, (struct sockaddr *)&sunx, SUN_LEN(&sunx)) < 0 ||
572 chmod(fx->name, fx->mode) < 0) {
573 (void)snprintf(line, sizeof line,
574 "cannot create %s", fx->name);
576 dprintf("cannot create %s (%d)\n", fx->name, errno);
577 if (fx == &funix_default || fx == &funix_secure)
580 STAILQ_REMOVE(&funixes, fx, funix, next);
584 increase_rcvbuf(fx->s);
586 if (SecureMode <= 1) {
587 if (STAILQ_EMPTY(&hqueue))
588 finet = socksetup(family, NULL);
589 STAILQ_FOREACH(host, &hqueue, next) {
591 finet0 = socksetup(family, host->name);
592 if (finet0 && !finet) {
594 } else if (finet0 && finet) {
595 total = *finet0 + *finet + 1;
596 finet = realloc(finet, total * sizeof(int));
598 err(1, "realloc failed");
599 for (i = 1; i <= *finet0; i++) {
600 finet[(*finet)+i] = finet0[i];
610 for (i = 0; i < *finet; i++) {
611 if (shutdown(finet[i+1], SHUT_RD) < 0 &&
613 logerror("shutdown");
619 dprintf("listening on inet and/or inet6 socket\n");
621 dprintf("sending on inet and/or inet6 socket\n");
624 if ((fklog = open(_PATH_KLOG, O_RDONLY|O_NONBLOCK, 0)) < 0)
625 dprintf("can't open %s (%d)\n", _PATH_KLOG, errno);
627 /* tuck my process id away */
630 dprintf("off & running....\n");
633 /* prevent SIGHUP and SIGCHLD handlers from running in parallel */
635 sigaddset(&mask, SIGCHLD);
636 sact.sa_handler = init;
638 sact.sa_flags = SA_RESTART;
639 (void)sigaction(SIGHUP, &sact, NULL);
642 tv.tv_sec = tv.tv_usec = 0;
644 if (fklog != -1 && fklog > fdsrmax)
646 if (finet && !SecureMode) {
647 for (i = 0; i < *finet; i++) {
648 if (finet[i+1] != -1 && finet[i+1] > fdsrmax)
649 fdsrmax = finet[i+1];
652 STAILQ_FOREACH(fx, &funixes, next)
656 fdsr = (fd_set *)calloc(howmany(fdsrmax+1, NFDBITS),
659 errx(1, "calloc fd_set");
667 bzero(fdsr, howmany(fdsrmax+1, NFDBITS) *
672 if (finet && !SecureMode) {
673 for (i = 0; i < *finet; i++) {
674 if (finet[i+1] != -1)
675 FD_SET(finet[i+1], fdsr);
678 STAILQ_FOREACH(fx, &funixes, next)
681 i = select(fdsrmax+1, fdsr, NULL, NULL,
682 needdofsync ? &tv : tvp);
698 if (fklog != -1 && FD_ISSET(fklog, fdsr))
700 if (finet && !SecureMode) {
701 for (i = 0; i < *finet; i++) {
702 if (FD_ISSET(finet[i+1], fdsr)) {
703 len = sizeof(frominet);
704 l = recvfrom(finet[i+1], line, MAXLINE,
705 0, (struct sockaddr *)&frominet,
709 hname = cvthname((struct sockaddr *)&frominet);
710 unmapped((struct sockaddr *)&frominet);
711 if (validate((struct sockaddr *)&frominet, hname))
712 printline(hname, line, RemoteAddDate ? ADDDATE : 0);
713 } else if (l < 0 && errno != EINTR)
714 logerror("recvfrom inet");
718 STAILQ_FOREACH(fx, &funixes, next) {
719 if (FD_ISSET(fx->s, fdsr)) {
720 len = sizeof(fromunix);
721 l = recvfrom(fx->s, line, MAXLINE, 0,
722 (struct sockaddr *)&fromunix, &len);
725 printline(LocalHostName, line, 0);
726 } else if (l < 0 && errno != EINTR)
727 logerror("recvfrom unix");
736 unmapped(struct sockaddr *sa)
738 struct sockaddr_in6 *sin6;
739 struct sockaddr_in sin4;
741 if (sa->sa_family != AF_INET6)
743 if (sa->sa_len != sizeof(struct sockaddr_in6) ||
744 sizeof(sin4) > sa->sa_len)
746 sin6 = (struct sockaddr_in6 *)sa;
747 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
750 memset(&sin4, 0, sizeof(sin4));
751 sin4.sin_family = AF_INET;
752 sin4.sin_len = sizeof(struct sockaddr_in);
753 memcpy(&sin4.sin_addr, &sin6->sin6_addr.s6_addr[12],
754 sizeof(sin4.sin_addr));
755 sin4.sin_port = sin6->sin6_port;
757 memcpy(sa, &sin4, sin4.sin_len);
764 fprintf(stderr, "%s\n%s\n%s\n%s\n",
765 "usage: syslogd [-468ACcdFknosTuv] [-a allowed_peer]",
766 " [-b bind_address] [-f config_file]",
767 " [-l [mode:]path] [-m mark_interval]",
768 " [-P pid_file] [-p log_socket]");
773 * Take a raw input line, decode the message, and print the message
774 * on the appropriate log files.
777 printline(const char *hname, char *msg, int flags)
782 char line[MAXLINE + 1];
784 /* test for special codes */
789 n = strtol(p + 1, &q, 10);
790 if (*q == '>' && n >= 0 && n < INT_MAX && errno == 0) {
795 if (pri &~ (LOG_FACMASK|LOG_PRIMASK))
799 * Don't allow users to log kernel messages.
800 * NOTE: since LOG_KERN == 0 this will also match
801 * messages with no facility specified.
803 if ((pri & LOG_FACMASK) == LOG_KERN && !KeepKernFac)
804 pri = LOG_MAKEPRI(LOG_USER, LOG_PRI(pri));
808 while ((c = (unsigned char)*p++) != '\0' &&
809 q < &line[sizeof(line) - 4]) {
810 if (mask_C1 && (c & 0x80) && c < 0xA0) {
815 if (isascii(c) && iscntrl(c)) {
818 } else if (c == '\t') {
830 logmsg(pri, line, hname, flags);
834 * Read /dev/klog while data are available, split into lines.
839 char *p, *q, line[MAXLINE + 1];
844 i = read(fklog, line + len, MAXLINE - 1 - len);
846 line[i + len] = '\0';
848 if (i < 0 && errno != EINTR && errno != EAGAIN) {
855 for (p = line; (q = strchr(p, '\n')) != NULL; p = q + 1) {
860 if (len >= MAXLINE - 1) {
865 memmove(line, p, len + 1);
872 * Take a raw input line from /dev/klog, format similar to syslog().
879 int flags, isprintf, pri;
881 flags = ISKERNEL | SYNC_FILE | ADDDATE; /* fsync after write */
887 n = strtol(p + 1, &q, 10);
888 if (*q == '>' && n >= 0 && n < INT_MAX && errno == 0) {
895 * Kernel printf's and LOG_CONSOLE messages have been displayed
896 * on the console already.
898 if (isprintf || (pri & LOG_FACMASK) == LOG_CONSOLE)
900 if (pri &~ (LOG_FACMASK|LOG_PRIMASK))
902 logmsg(pri, p, LocalHostName, flags);
908 * Match a program or host name against a specification.
909 * Return a non-0 value if the message must be ignored
910 * based on the specification.
913 skip_message(const char *name, const char *spec, int checkcase)
918 /* Behaviour on explicit match */
933 s = strstr (spec, name);
935 s = strcasestr (spec, name);
938 prev = (s == spec ? ',' : *(s - 1));
939 next = *(s + strlen (name));
941 if (prev == ',' && (next == '\0' || next == ','))
942 /* Explicit match: skip iff the spec is an
947 /* No explicit match for this name: skip the message iff
948 the spec is an inclusive one. */
953 * Log a message to the appropriate log files, users, etc. based on
957 logmsg(int pri, const char *msg, const char *from, int flags)
960 int i, fac, msglen, omask, prilev;
961 const char *timestamp;
962 char prog[NAME_MAX+1];
965 dprintf("logmsg: pri %o, flags %x, from %s, msg %s\n",
966 pri, flags, from, msg);
968 omask = sigblock(sigmask(SIGHUP)|sigmask(SIGALRM));
971 * Check to see if msg looks non-standard.
973 msglen = strlen(msg);
974 if (msglen < 16 || msg[3] != ' ' || msg[6] != ' ' ||
975 msg[9] != ':' || msg[12] != ':' || msg[15] != ' ')
979 if (flags & ADDDATE) {
980 timestamp = ctime(&now) + 4;
987 /* skip leading blanks */
988 while (isspace(*msg)) {
993 /* extract facility and priority level */
995 fac = LOG_NFACILITIES;
999 /* Check maximum facility number. */
1000 if (fac > LOG_NFACILITIES) {
1001 (void)sigsetmask(omask);
1005 prilev = LOG_PRI(pri);
1007 /* extract program name */
1008 for (i = 0; i < NAME_MAX; i++) {
1009 if (!isprint(msg[i]) || msg[i] == ':' || msg[i] == '[' ||
1010 msg[i] == '/' || isspace(msg[i]))
1016 /* add kernel prefix for kernel messages */
1017 if (flags & ISKERNEL) {
1018 snprintf(buf, sizeof(buf), "%s: %s",
1019 use_bootfile ? bootfile : "kernel", msg);
1021 msglen = strlen(buf);
1024 /* log the message to the particular outputs */
1028 * Open in non-blocking mode to avoid hangs during open
1029 * and close(waiting for the port to drain).
1031 f->f_file = open(ctty, O_WRONLY | O_NONBLOCK, 0);
1033 if (f->f_file >= 0) {
1034 (void)strlcpy(f->f_lasttime, timestamp,
1035 sizeof(f->f_lasttime));
1036 fprintlog(f, flags, msg);
1040 (void)sigsetmask(omask);
1043 for (f = Files; f; f = f->f_next) {
1044 /* skip messages that are incorrect priority */
1045 if (!(((f->f_pcmp[fac] & PRI_EQ) && (f->f_pmask[fac] == prilev))
1046 ||((f->f_pcmp[fac] & PRI_LT) && (f->f_pmask[fac] < prilev))
1047 ||((f->f_pcmp[fac] & PRI_GT) && (f->f_pmask[fac] > prilev))
1049 || f->f_pmask[fac] == INTERNAL_NOPRI)
1052 /* skip messages with the incorrect hostname */
1053 if (skip_message(from, f->f_host, 0))
1056 /* skip messages with the incorrect program name */
1057 if (skip_message(prog, f->f_program, 1))
1060 /* skip message to console if it has already been printed */
1061 if (f->f_type == F_CONSOLE && (flags & IGN_CONS))
1064 /* don't output marks to recently written files */
1065 if ((flags & MARK) && (now - f->f_time) < MarkInterval / 2)
1069 * suppress duplicate lines to this file
1071 if (no_compress - (f->f_type != F_PIPE) < 1 &&
1072 (flags & MARK) == 0 && msglen == f->f_prevlen &&
1073 !strcmp(msg, f->f_prevline) &&
1074 !strcasecmp(from, f->f_prevhost)) {
1075 (void)strlcpy(f->f_lasttime, timestamp,
1076 sizeof(f->f_lasttime));
1078 dprintf("msg repeated %d times, %ld sec of %d\n",
1079 f->f_prevcount, (long)(now - f->f_time),
1080 repeatinterval[f->f_repeatcount]);
1082 * If domark would have logged this by now,
1083 * flush it now (so we don't hold isolated messages),
1084 * but back off so we'll flush less often
1087 if (now > REPEATTIME(f)) {
1088 fprintlog(f, flags, (char *)NULL);
1092 /* new line, save it */
1094 fprintlog(f, 0, (char *)NULL);
1095 f->f_repeatcount = 0;
1097 (void)strlcpy(f->f_lasttime, timestamp,
1098 sizeof(f->f_lasttime));
1099 (void)strlcpy(f->f_prevhost, from,
1100 sizeof(f->f_prevhost));
1101 if (msglen < MAXSVLINE) {
1102 f->f_prevlen = msglen;
1103 (void)strlcpy(f->f_prevline, msg, sizeof(f->f_prevline));
1104 fprintlog(f, flags, (char *)NULL);
1106 f->f_prevline[0] = 0;
1108 fprintlog(f, flags, msg);
1112 (void)sigsetmask(omask);
1120 for (f = Files; f; f = f->f_next) {
1121 if ((f->f_type == F_FILE) &&
1122 (f->f_flags & FFLAG_NEEDSYNC)) {
1123 f->f_flags &= ~FFLAG_NEEDSYNC;
1124 (void)fsync(f->f_file);
1131 fprintlog(struct filed *f, int flags, const char *msg)
1133 struct iovec iov[IOV_SIZE];
1136 int i, l, lsent = 0;
1137 char line[MAXLINE + 1], repbuf[80], greetings[200], *wmsg = NULL;
1138 char nul[] = "", space[] = " ", lf[] = "\n", crlf[] = "\r\n";
1142 if (f->f_type == F_WALL) {
1143 v->iov_base = greetings;
1144 /* The time displayed is not synchornized with the other log
1145 * destinations (like messages). Following fragment was using
1146 * ctime(&now), which was updating the time every 30 sec.
1147 * With f_lasttime, time is synchronized correctly.
1149 v->iov_len = snprintf(greetings, sizeof greetings,
1150 "\r\n\7Message from syslogd@%s at %.24s ...\r\n",
1151 f->f_prevhost, f->f_lasttime);
1152 if (v->iov_len >= sizeof greetings)
1153 v->iov_len = sizeof greetings - 1;
1159 v->iov_base = f->f_lasttime;
1160 v->iov_len = strlen(f->f_lasttime);
1162 v->iov_base = space;
1168 static char fp_buf[30]; /* Hollow laugh */
1169 int fac = f->f_prevpri & LOG_FACMASK;
1170 int pri = LOG_PRI(f->f_prevpri);
1171 const char *f_s = NULL;
1172 char f_n[5]; /* Hollow laugh */
1173 const char *p_s = NULL;
1174 char p_n[5]; /* Hollow laugh */
1176 if (LogFacPri > 1) {
1179 for (c = facilitynames; c->c_name; c++) {
1180 if (c->c_val == fac) {
1185 for (c = prioritynames; c->c_name; c++) {
1186 if (c->c_val == pri) {
1193 snprintf(f_n, sizeof f_n, "%d", LOG_FAC(fac));
1197 snprintf(p_n, sizeof p_n, "%d", pri);
1200 snprintf(fp_buf, sizeof fp_buf, "<%s.%s> ", f_s, p_s);
1201 v->iov_base = fp_buf;
1202 v->iov_len = strlen(fp_buf);
1209 v->iov_base = f->f_prevhost;
1210 v->iov_len = strlen(v->iov_base);
1212 v->iov_base = space;
1217 wmsg = strdup(msg); /* XXX iov_base needs a `const' sibling. */
1223 v->iov_len = strlen(msg);
1224 } else if (f->f_prevcount > 1) {
1225 v->iov_base = repbuf;
1226 v->iov_len = snprintf(repbuf, sizeof repbuf,
1227 "last message repeated %d times", f->f_prevcount);
1229 v->iov_base = f->f_prevline;
1230 v->iov_len = f->f_prevlen;
1234 dprintf("Logging to %s", TypeNames[f->f_type]);
1237 switch (f->f_type) {
1244 port = (int)ntohs(((struct sockaddr_in *)
1245 (f->f_un.f_forw.f_addr->ai_addr))->sin_port);
1247 dprintf(" %s:%d\n", f->f_un.f_forw.f_hname, port);
1249 dprintf(" %s\n", f->f_un.f_forw.f_hname);
1251 /* check for local vs remote messages */
1252 if (strcasecmp(f->f_prevhost, LocalHostName))
1253 l = snprintf(line, sizeof line - 1,
1254 "<%d>%.15s Forwarded from %s: %s",
1255 f->f_prevpri, (char *)iov[0].iov_base,
1256 f->f_prevhost, (char *)iov[5].iov_base);
1258 l = snprintf(line, sizeof line - 1, "<%d>%.15s %s",
1259 f->f_prevpri, (char *)iov[0].iov_base,
1260 (char *)iov[5].iov_base);
1263 else if (l > MAXLINE)
1267 for (r = f->f_un.f_forw.f_addr; r; r = r->ai_next) {
1268 for (i = 0; i < *finet; i++) {
1271 * should we check AF first, or just
1272 * trial and error? FWD
1275 address_family_of(finet[i+1]))
1277 lsent = sendto(finet[i+1], line, l, 0,
1278 r->ai_addr, r->ai_addrlen);
1282 if (lsent == l && !send_to_all)
1285 dprintf("lsent/l: %d/%d\n", lsent, l);
1300 /* case ENOTSOCK: */
1302 /* case EMSGSIZE: */
1305 /* case ECONNREFUSED: */
1307 dprintf("removing entry: errno=%d\n", e);
1308 f->f_type = F_UNUSED;
1316 dprintf(" %s\n", f->f_un.f_fname);
1319 if (writev(f->f_file, iov, IOV_SIZE) < 0) {
1321 * If writev(2) fails for potentially transient errors
1322 * like the filesystem being full, ignore it.
1323 * Otherwise remove this logfile from the list.
1325 if (errno != ENOSPC) {
1329 logerror(f->f_un.f_fname);
1331 } else if ((flags & SYNC_FILE) && (f->f_flags & FFLAG_SYNC)) {
1332 f->f_flags |= FFLAG_NEEDSYNC;
1338 dprintf(" %s\n", f->f_un.f_pipe.f_pname);
1341 if (f->f_un.f_pipe.f_pid == 0) {
1342 if ((f->f_file = p_open(f->f_un.f_pipe.f_pname,
1343 &f->f_un.f_pipe.f_pid)) < 0) {
1344 f->f_type = F_UNUSED;
1345 logerror(f->f_un.f_pipe.f_pname);
1349 if (writev(f->f_file, iov, IOV_SIZE) < 0) {
1352 if (f->f_un.f_pipe.f_pid > 0)
1353 deadq_enter(f->f_un.f_pipe.f_pid,
1354 f->f_un.f_pipe.f_pname);
1355 f->f_un.f_pipe.f_pid = 0;
1357 logerror(f->f_un.f_pipe.f_pname);
1362 if (flags & IGN_CONS) {
1363 dprintf(" (ignored)\n");
1369 dprintf(" %s%s\n", _PATH_DEV, f->f_un.f_fname);
1373 errno = 0; /* ttymsg() only sometimes returns an errno */
1374 if ((msgret = ttymsg(iov, IOV_SIZE, f->f_un.f_fname, 10))) {
1375 f->f_type = F_UNUSED;
1385 wallmsg(f, iov, IOV_SIZE);
1393 * WALLMSG -- Write a message to the world at large
1395 * Write the specified message to either the entire
1396 * world, or a list of approved users.
1399 wallmsg(struct filed *f, struct iovec *iov, const int iovlen)
1401 static int reenter; /* avoid calling ourselves */
1410 while ((ut = getutxent()) != NULL) {
1411 if (ut->ut_type != USER_PROCESS)
1413 if (f->f_type == F_WALL) {
1414 if ((p = ttymsg(iov, iovlen, ut->ut_line,
1415 TTYMSGTIME)) != NULL) {
1416 errno = 0; /* already in msg */
1421 /* should we send the message to this user? */
1422 for (i = 0; i < MAXUNAMES; i++) {
1423 if (!f->f_un.f_uname[i][0])
1425 if (!strcmp(f->f_un.f_uname[i], ut->ut_user)) {
1426 if ((p = ttymsg_check(iov, iovlen, ut->ut_line,
1427 TTYMSGTIME)) != NULL) {
1428 errno = 0; /* already in msg */
1440 * Wrapper routine for ttymsg() that checks the terminal for messages enabled.
1443 ttymsg_check(struct iovec *iov, int iovcnt, char *line, int tmout)
1445 static char device[1024];
1446 static char errbuf[1024];
1449 (void) snprintf(device, sizeof(device), "%s%s", _PATH_DEV, line);
1451 if (stat(device, &sb) < 0) {
1452 (void) snprintf(errbuf, sizeof(errbuf),
1453 "%s: %s", device, strerror(errno));
1456 if ((sb.st_mode & S_IWGRP) == 0)
1457 /* Messages disabled. */
1459 return ttymsg(iov, iovcnt, line, tmout);
1463 reapchild(int signo __unused)
1469 while ((pid = wait3(&status, WNOHANG, (struct rusage *)NULL)) > 0) {
1471 /* Don't tell while we are initting. */
1474 /* First, look if it's a process from the dead queue. */
1475 if (deadq_remove(pid))
1478 /* Now, look in list of active processes. */
1479 for (f = Files; f; f = f->f_next)
1480 if (f->f_type == F_PIPE &&
1481 f->f_un.f_pipe.f_pid == pid) {
1483 f->f_un.f_pipe.f_pid = 0;
1484 log_deadchild(pid, status,
1485 f->f_un.f_pipe.f_pname);
1494 * Return a printable representation of a host address.
1497 cvthname(struct sockaddr *f)
1500 sigset_t omask, nmask;
1501 static char hname[NI_MAXHOST], ip[NI_MAXHOST];
1503 error = getnameinfo((struct sockaddr *)f,
1504 ((struct sockaddr *)f)->sa_len,
1505 ip, sizeof ip, NULL, 0, NI_NUMERICHOST);
1506 dprintf("cvthname(%s)\n", ip);
1509 dprintf("Malformed from address %s\n", gai_strerror(error));
1515 sigemptyset(&nmask);
1516 sigaddset(&nmask, SIGHUP);
1517 sigprocmask(SIG_BLOCK, &nmask, &omask);
1518 error = getnameinfo((struct sockaddr *)f,
1519 ((struct sockaddr *)f)->sa_len,
1520 hname, sizeof hname, NULL, 0, NI_NAMEREQD);
1521 sigprocmask(SIG_SETMASK, &omask, NULL);
1523 dprintf("Host name for your address (%s) unknown\n", ip);
1527 if (hl > 0 && hname[hl-1] == '.')
1529 trimdomain(hname, hl);
1541 domark(int signo __unused)
1548 * Print syslogd errors some place.
1551 logerror(const char *type)
1554 static int recursed = 0;
1556 /* If there's an error while trying to log an error, give up. */
1562 sizeof buf, "syslogd: %s: %s", type, strerror(errno));
1564 (void)snprintf(buf, sizeof buf, "syslogd: %s", type);
1566 dprintf("%s\n", buf);
1567 logmsg(LOG_SYSLOG|LOG_ERR, buf, LocalHostName, ADDDATE);
1576 int was_initialized;
1579 was_initialized = Initialized;
1580 Initialized = 0; /* Don't log SIGCHLDs. */
1581 for (f = Files; f != NULL; f = f->f_next) {
1582 /* flush any pending output */
1584 fprintlog(f, 0, (char *)NULL);
1585 if (f->f_type == F_PIPE && f->f_un.f_pipe.f_pid > 0) {
1587 f->f_un.f_pipe.f_pid = 0;
1590 Initialized = was_initialized;
1592 dprintf("syslogd: exiting on signal %d\n", signo);
1593 (void)snprintf(buf, sizeof(buf), "exiting on signal %d", signo);
1597 STAILQ_FOREACH(fx, &funixes, next)
1598 (void)unlink(fx->name);
1599 pidfile_remove(pfh);
1605 * INIT -- Initialize syslogd from configuration table
1612 struct filed *f, *next, **nextp;
1614 char cline[LINE_MAX];
1615 char prog[LINE_MAX];
1616 char host[MAXHOSTNAMELEN];
1617 char oldLocalHostName[MAXHOSTNAMELEN];
1618 char hostMsg[2*MAXHOSTNAMELEN+40];
1619 char bootfileMsg[LINE_MAX];
1624 * Load hostname (may have changed).
1627 (void)strlcpy(oldLocalHostName, LocalHostName,
1628 sizeof(oldLocalHostName));
1629 if (gethostname(LocalHostName, sizeof(LocalHostName)))
1630 err(EX_OSERR, "gethostname() failed");
1631 if ((p = strchr(LocalHostName, '.')) != NULL) {
1639 * Load / reload timezone data (in case it changed).
1641 * Just calling tzset() again does not work, the timezone code
1642 * caches the result. However, by setting the TZ variable, one
1643 * can defeat the caching and have the timezone code really
1644 * reload the timezone data. Respect any initial setting of
1645 * TZ, in case the system is configured specially.
1647 dprintf("loading timezone data via tzset()\n");
1651 setenv("TZ", ":/etc/localtime", 1);
1657 * Close all open log files.
1660 for (f = Files; f != NULL; f = next) {
1661 /* flush any pending output */
1663 fprintlog(f, 0, (char *)NULL);
1665 switch (f->f_type) {
1673 if (f->f_un.f_pipe.f_pid > 0) {
1675 deadq_enter(f->f_un.f_pipe.f_pid,
1676 f->f_un.f_pipe.f_pname);
1678 f->f_un.f_pipe.f_pid = 0;
1682 if (f->f_program) free(f->f_program);
1683 if (f->f_host) free(f->f_host);
1689 /* open the configuration file */
1690 if ((cf = fopen(ConfFile, "r")) == NULL) {
1691 dprintf("cannot open %s\n", ConfFile);
1692 *nextp = (struct filed *)calloc(1, sizeof(*f));
1693 if (*nextp == NULL) {
1697 cfline("*.ERR\t/dev/console", *nextp, "*", "*");
1698 (*nextp)->f_next = (struct filed *)calloc(1, sizeof(*f));
1699 if ((*nextp)->f_next == NULL) {
1703 cfline("*.PANIC\t*", (*nextp)->f_next, "*", "*");
1709 * Foreach line in the conf table, open that file.
1712 (void)strlcpy(host, "*", sizeof(host));
1713 (void)strlcpy(prog, "*", sizeof(prog));
1714 while (fgets(cline, sizeof(cline), cf) != NULL) {
1716 * check for end-of-section, comments, strip off trailing
1717 * spaces and newline character. #!prog is treated specially:
1718 * following lines apply only to that program.
1720 for (p = cline; isspace(*p); ++p)
1726 if (*p != '!' && *p != '+' && *p != '-')
1729 if (*p == '+' || *p == '-') {
1733 if ((!*p) || (*p == '*')) {
1734 (void)strlcpy(host, "*", sizeof(host));
1739 for (i = 1; i < MAXHOSTNAMELEN - 1; i++) {
1740 if (!isalnum(*p) && *p != '.' && *p != '-'
1741 && *p != ',' && *p != ':' && *p != '%')
1750 while (isspace(*p)) p++;
1751 if ((!*p) || (*p == '*')) {
1752 (void)strlcpy(prog, "*", sizeof(prog));
1755 for (i = 0; i < LINE_MAX - 1; i++) {
1756 if (!isprint(p[i]) || isspace(p[i]))
1763 for (p = cline + 1; *p != '\0'; p++) {
1766 if (*(p - 1) == '\\') {
1774 for (i = strlen(cline) - 1; i >= 0 && isspace(cline[i]); i--)
1776 f = (struct filed *)calloc(1, sizeof(*f));
1783 cfline(cline, f, prog, host);
1786 /* close the configuration file */
1793 for (f = Files; f; f = f->f_next) {
1794 for (i = 0; i <= LOG_NFACILITIES; i++)
1795 if (f->f_pmask[i] == INTERNAL_NOPRI)
1798 printf("%d ", f->f_pmask[i]);
1799 printf("%s: ", TypeNames[f->f_type]);
1800 switch (f->f_type) {
1802 printf("%s", f->f_un.f_fname);
1807 printf("%s%s", _PATH_DEV, f->f_un.f_fname);
1811 port = (int)ntohs(((struct sockaddr_in *)
1812 (f->f_un.f_forw.f_addr->ai_addr))->sin_port);
1815 f->f_un.f_forw.f_hname, port);
1817 printf("%s", f->f_un.f_forw.f_hname);
1822 printf("%s", f->f_un.f_pipe.f_pname);
1826 for (i = 0; i < MAXUNAMES && *f->f_un.f_uname[i]; i++)
1827 printf("%s, ", f->f_un.f_uname[i]);
1831 printf(" (%s)", f->f_program);
1836 logmsg(LOG_SYSLOG|LOG_INFO, "syslogd: restart", LocalHostName, ADDDATE);
1837 dprintf("syslogd: restarted\n");
1839 * Log a change in hostname, but only on a restart.
1841 if (signo != 0 && strcmp(oldLocalHostName, LocalHostName) != 0) {
1842 (void)snprintf(hostMsg, sizeof(hostMsg),
1843 "syslogd: hostname changed, \"%s\" to \"%s\"",
1844 oldLocalHostName, LocalHostName);
1845 logmsg(LOG_SYSLOG|LOG_INFO, hostMsg, LocalHostName, ADDDATE);
1846 dprintf("%s\n", hostMsg);
1849 * Log the kernel boot file if we aren't going to use it as
1850 * the prefix, and if this is *not* a restart.
1852 if (signo == 0 && !use_bootfile) {
1853 (void)snprintf(bootfileMsg, sizeof(bootfileMsg),
1854 "syslogd: kernel boot file is %s", bootfile);
1855 logmsg(LOG_KERN|LOG_INFO, bootfileMsg, LocalHostName, ADDDATE);
1856 dprintf("%s\n", bootfileMsg);
1861 * Crack a configuration file line
1864 cfline(const char *line, struct filed *f, const char *prog, const char *host)
1866 struct addrinfo hints, *res;
1867 int error, i, pri, syncfile;
1870 char buf[MAXLINE], ebuf[100];
1872 dprintf("cfline(\"%s\", f, \"%s\", \"%s\")\n", line, prog, host);
1874 errno = 0; /* keep strerror() stuff out of logerror messages */
1876 /* clear out file entry */
1877 memset(f, 0, sizeof(*f));
1878 for (i = 0; i <= LOG_NFACILITIES; i++)
1879 f->f_pmask[i] = INTERNAL_NOPRI;
1881 /* save hostname if any */
1882 if (host && *host == '*')
1887 f->f_host = strdup(host);
1888 if (f->f_host == NULL) {
1892 hl = strlen(f->f_host);
1893 if (hl > 0 && f->f_host[hl-1] == '.')
1894 f->f_host[--hl] = '\0';
1895 trimdomain(f->f_host, hl);
1898 /* save program name if any */
1899 if (prog && *prog == '*')
1902 f->f_program = strdup(prog);
1903 if (f->f_program == NULL) {
1909 /* scan through the list of selectors */
1910 for (p = line; *p && *p != '\t' && *p != ' ';) {
1915 /* find the end of this facility name list */
1916 for (q = p; *q && *q != '\t' && *q != ' ' && *q++ != '.'; )
1919 /* get the priority comparison */
1947 /* collect priority name */
1948 for (bp = buf; *q && !strchr("\t,; ", *q); )
1953 while (strchr(",;", *q))
1956 /* decode priority name */
1959 pri_cmp = PRI_LT | PRI_EQ | PRI_GT;
1961 /* Ignore trailing spaces. */
1962 for (i = strlen(buf) - 1; i >= 0 && buf[i] == ' '; i--)
1965 pri = decode(buf, prioritynames);
1968 (void)snprintf(ebuf, sizeof ebuf,
1969 "unknown priority name \"%s\"", buf);
1975 pri_cmp = (UniquePriority)
1980 pri_cmp ^= PRI_LT | PRI_EQ | PRI_GT;
1982 /* scan facilities */
1983 while (*p && !strchr("\t.; ", *p)) {
1984 for (bp = buf; *p && !strchr("\t,;. ", *p); )
1989 for (i = 0; i < LOG_NFACILITIES; i++) {
1990 f->f_pmask[i] = pri;
1991 f->f_pcmp[i] = pri_cmp;
1994 i = decode(buf, facilitynames);
1997 (void)snprintf(ebuf, sizeof ebuf,
1998 "unknown facility name \"%s\"",
2003 f->f_pmask[i >> 3] = pri;
2004 f->f_pcmp[i >> 3] = pri_cmp;
2006 while (*p == ',' || *p == ' ')
2013 /* skip to action part */
2014 while (*p == '\t' || *p == ' ')
2029 * scan forward to see if there is a port defined.
2030 * so we can't use strlcpy..
2032 i = sizeof(f->f_un.f_forw.f_hname);
2033 tp = f->f_un.f_forw.f_hname;
2037 * an ipv6 address should start with a '[' in that case
2038 * we should scan for a ']'
2044 while (*p && (*p != endkey) && (i-- > 0)) {
2047 if (endkey == ']' && *p == endkey)
2051 /* See if we copied a domain and have a port */
2057 memset(&hints, 0, sizeof(hints));
2058 hints.ai_family = family;
2059 hints.ai_socktype = SOCK_DGRAM;
2060 error = getaddrinfo(f->f_un.f_forw.f_hname,
2061 p ? p : "syslog", &hints, &res);
2063 logerror(gai_strerror(error));
2066 f->f_un.f_forw.f_addr = res;
2071 if ((f->f_file = open(p, logflags, 0600)) < 0) {
2072 f->f_type = F_UNUSED;
2077 f->f_flags |= FFLAG_SYNC;
2078 if (isatty(f->f_file)) {
2079 if (strcmp(p, ctty) == 0)
2080 f->f_type = F_CONSOLE;
2083 (void)strlcpy(f->f_un.f_fname, p + sizeof(_PATH_DEV) - 1,
2084 sizeof(f->f_un.f_fname));
2086 (void)strlcpy(f->f_un.f_fname, p, sizeof(f->f_un.f_fname));
2092 f->f_un.f_pipe.f_pid = 0;
2093 (void)strlcpy(f->f_un.f_pipe.f_pname, p + 1,
2094 sizeof(f->f_un.f_pipe.f_pname));
2103 for (i = 0; i < MAXUNAMES && *p; i++) {
2104 for (q = p; *q && *q != ','; )
2106 (void)strncpy(f->f_un.f_uname[i], p, MAXLOGNAME - 1);
2107 if ((q - p) >= MAXLOGNAME)
2108 f->f_un.f_uname[i][MAXLOGNAME - 1] = '\0';
2110 f->f_un.f_uname[i][q - p] = '\0';
2111 while (*q == ',' || *q == ' ')
2115 f->f_type = F_USERS;
2122 * Decode a symbolic name to a numeric value
2125 decode(const char *name, const CODE *codetab)
2131 return (atoi(name));
2133 for (p = buf; *name && p < &buf[sizeof(buf) - 1]; p++, name++) {
2135 *p = tolower(*name);
2140 for (c = codetab; c->c_name; c++)
2141 if (!strcmp(buf, c->c_name))
2153 now = time((time_t *)NULL);
2154 MarkSeq += TIMERINTVL;
2155 if (MarkSeq >= MarkInterval) {
2156 logmsg(LOG_INFO, "-- MARK --",
2157 LocalHostName, ADDDATE|MARK);
2161 for (f = Files; f; f = f->f_next) {
2162 if (f->f_prevcount && now >= REPEATTIME(f)) {
2163 dprintf("flush %s: repeated %d times, %d sec.\n",
2164 TypeNames[f->f_type], f->f_prevcount,
2165 repeatinterval[f->f_repeatcount]);
2166 fprintlog(f, 0, (char *)NULL);
2171 /* Walk the dead queue, and see if we should signal somebody. */
2172 for (q = TAILQ_FIRST(&deadq_head); q != NULL; q = next) {
2173 next = TAILQ_NEXT(q, dq_entries);
2175 switch (q->dq_timeout) {
2177 /* Already signalled once, try harder now. */
2178 if (kill(q->dq_pid, SIGKILL) != 0)
2179 (void)deadq_remove(q->dq_pid);
2184 * Timed out on dead queue, send terminate
2185 * signal. Note that we leave the removal
2186 * from the dead queue to reapchild(), which
2187 * will also log the event (unless the process
2188 * didn't even really exist, in case we simply
2189 * drop it from the dead queue).
2191 if (kill(q->dq_pid, SIGTERM) != 0)
2192 (void)deadq_remove(q->dq_pid);
2200 (void)alarm(TIMERINTVL);
2204 * fork off and become a daemon, but wait for the child to come online
2205 * before returing to the parent, or we get disk thrashing at boot etc.
2206 * Set a timer so we don't hang forever if it wedges.
2209 waitdaemon(int nochdir, int noclose, int maxwait)
2213 pid_t pid, childpid;
2215 switch (childpid = fork()) {
2221 signal(SIGALRM, timedout);
2223 while ((pid = wait3(&status, 0, NULL)) != -1) {
2224 if (WIFEXITED(status))
2225 errx(1, "child pid %d exited with return code %d",
2226 pid, WEXITSTATUS(status));
2227 if (WIFSIGNALED(status))
2228 errx(1, "child pid %d exited on signal %d%s",
2229 pid, WTERMSIG(status),
2230 WCOREDUMP(status) ? " (core dumped)" :
2232 if (pid == childpid) /* it's gone... */
2244 if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
2245 (void)dup2(fd, STDIN_FILENO);
2246 (void)dup2(fd, STDOUT_FILENO);
2247 (void)dup2(fd, STDERR_FILENO);
2255 * We get a SIGALRM from the child when it's running and finished doing it's
2256 * fsync()'s or O_SYNC writes for all the boot messages.
2258 * We also get a signal from the kernel if the timer expires, so check to
2259 * see what happened.
2262 timedout(int sig __unused)
2266 signal(SIGALRM, SIG_DFL);
2268 errx(1, "timed out waiting for child");
2274 * Add `s' to the list of allowable peer addresses to accept messages
2277 * `s' is a string in the form:
2279 * [*]domainname[:{servicename|portnumber|*}]
2283 * netaddr/maskbits[:{servicename|portnumber|*}]
2285 * Returns -1 on error, 0 if the argument was valid.
2291 struct allowedpeer ap;
2294 struct addrinfo hints, *res;
2295 struct in_addr *addrp, *maskp;
2298 u_int32_t *addr6p, *mask6p;
2300 char ip[NI_MAXHOST];
2303 if (*s != '[' || (cp1 = strchr(s + 1, ']')) == NULL)
2306 if ((cp1 = strrchr(cp1, ':'))) {
2307 /* service/port provided */
2309 if (strlen(cp1) == 1 && *cp1 == '*')
2310 /* any port allowed */
2312 else if ((se = getservbyname(cp1, "udp"))) {
2313 ap.port = ntohs(se->s_port);
2315 ap.port = strtol(cp1, &cp2, 0);
2317 return (-1); /* port not numeric */
2320 if ((se = getservbyname("syslog", "udp")))
2321 ap.port = ntohs(se->s_port);
2323 /* sanity, should not happen */
2327 if ((cp1 = strchr(s, '/')) != NULL &&
2328 strspn(cp1 + 1, "0123456789") == strlen(cp1 + 1)) {
2330 if ((masklen = atoi(cp1 + 1)) < 0)
2335 cp2 = s + strlen(s) - 1;
2346 memset(&hints, 0, sizeof(hints));
2347 hints.ai_family = PF_UNSPEC;
2348 hints.ai_socktype = SOCK_DGRAM;
2349 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
2350 if (getaddrinfo(s, NULL, &hints, &res) == 0) {
2352 memcpy(&ap.a_addr, res->ai_addr, res->ai_addrlen);
2353 memset(&ap.a_mask, 0, sizeof(ap.a_mask));
2354 ap.a_mask.ss_family = res->ai_family;
2355 if (res->ai_family == AF_INET) {
2356 ap.a_mask.ss_len = sizeof(struct sockaddr_in);
2357 maskp = &((struct sockaddr_in *)&ap.a_mask)->sin_addr;
2358 addrp = &((struct sockaddr_in *)&ap.a_addr)->sin_addr;
2360 /* use default netmask */
2361 if (IN_CLASSA(ntohl(addrp->s_addr)))
2362 maskp->s_addr = htonl(IN_CLASSA_NET);
2363 else if (IN_CLASSB(ntohl(addrp->s_addr)))
2364 maskp->s_addr = htonl(IN_CLASSB_NET);
2366 maskp->s_addr = htonl(IN_CLASSC_NET);
2367 } else if (masklen <= 32) {
2368 /* convert masklen to netmask */
2372 maskp->s_addr = htonl(~((1 << (32 - masklen)) - 1));
2377 /* Lose any host bits in the network number. */
2378 addrp->s_addr &= maskp->s_addr;
2381 else if (res->ai_family == AF_INET6 && masklen <= 128) {
2382 ap.a_mask.ss_len = sizeof(struct sockaddr_in6);
2385 mask6p = (u_int32_t *)&((struct sockaddr_in6 *)&ap.a_mask)->sin6_addr;
2386 /* convert masklen to netmask */
2387 while (masklen > 0) {
2389 *mask6p = htonl(~(0xffffffff >> masklen));
2392 *mask6p++ = 0xffffffff;
2395 /* Lose any host bits in the network number. */
2396 mask6p = (u_int32_t *)&((struct sockaddr_in6 *)&ap.a_mask)->sin6_addr;
2397 addr6p = (u_int32_t *)&((struct sockaddr_in6 *)&ap.a_addr)->sin6_addr;
2398 for (i = 0; i < 4; i++)
2399 addr6p[i] &= mask6p[i];
2408 /* arg `s' is domain name */
2422 printf("allowaddr: rule %d: ", NumAllowed);
2424 printf("numeric, ");
2425 getnameinfo((struct sockaddr *)&ap.a_addr,
2426 ((struct sockaddr *)&ap.a_addr)->sa_len,
2427 ip, sizeof ip, NULL, 0, NI_NUMERICHOST);
2428 printf("addr = %s, ", ip);
2429 getnameinfo((struct sockaddr *)&ap.a_mask,
2430 ((struct sockaddr *)&ap.a_mask)->sa_len,
2431 ip, sizeof ip, NULL, 0, NI_NUMERICHOST);
2432 printf("mask = %s; ", ip);
2434 printf("domainname = %s; ", ap.a_name);
2436 printf("port = %d\n", ap.port);
2439 if ((AllowedPeers = realloc(AllowedPeers,
2440 ++NumAllowed * sizeof(struct allowedpeer)))
2442 logerror("realloc");
2445 memcpy(&AllowedPeers[NumAllowed - 1], &ap, sizeof(struct allowedpeer));
2450 * Validate that the remote peer has permission to log to us.
2453 validate(struct sockaddr *sa, const char *hname)
2457 char *cp, name[NI_MAXHOST], ip[NI_MAXHOST], port[NI_MAXSERV];
2458 struct allowedpeer *ap;
2459 struct sockaddr_in *sin4, *a4p = NULL, *m4p = NULL;
2462 struct sockaddr_in6 *sin6, *a6p = NULL, *m6p = NULL;
2464 struct addrinfo hints, *res;
2467 if (NumAllowed == 0)
2468 /* traditional behaviour, allow everything */
2471 (void)strlcpy(name, hname, sizeof(name));
2472 memset(&hints, 0, sizeof(hints));
2473 hints.ai_family = PF_UNSPEC;
2474 hints.ai_socktype = SOCK_DGRAM;
2475 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
2476 if (getaddrinfo(name, NULL, &hints, &res) == 0)
2478 else if (strchr(name, '.') == NULL) {
2479 strlcat(name, ".", sizeof name);
2480 strlcat(name, LocalDomain, sizeof name);
2482 if (getnameinfo(sa, sa->sa_len, ip, sizeof ip, port, sizeof port,
2483 NI_NUMERICHOST | NI_NUMERICSERV) != 0)
2484 return (0); /* for safety, should not occur */
2485 dprintf("validate: dgram from IP %s, port %s, name %s;\n",
2489 /* now, walk down the list */
2490 for (i = 0, ap = AllowedPeers; i < NumAllowed; i++, ap++) {
2491 if (ap->port != 0 && ap->port != sport) {
2492 dprintf("rejected in rule %d due to port mismatch.\n", i);
2496 if (ap->isnumeric) {
2497 if (ap->a_addr.ss_family != sa->sa_family) {
2498 dprintf("rejected in rule %d due to address family mismatch.\n", i);
2501 if (ap->a_addr.ss_family == AF_INET) {
2502 sin4 = (struct sockaddr_in *)sa;
2503 a4p = (struct sockaddr_in *)&ap->a_addr;
2504 m4p = (struct sockaddr_in *)&ap->a_mask;
2505 if ((sin4->sin_addr.s_addr & m4p->sin_addr.s_addr)
2506 != a4p->sin_addr.s_addr) {
2507 dprintf("rejected in rule %d due to IP mismatch.\n", i);
2512 else if (ap->a_addr.ss_family == AF_INET6) {
2513 sin6 = (struct sockaddr_in6 *)sa;
2514 a6p = (struct sockaddr_in6 *)&ap->a_addr;
2515 m6p = (struct sockaddr_in6 *)&ap->a_mask;
2516 if (a6p->sin6_scope_id != 0 &&
2517 sin6->sin6_scope_id != a6p->sin6_scope_id) {
2518 dprintf("rejected in rule %d due to scope mismatch.\n", i);
2522 for (j = 0; j < 16; j += 4) {
2523 if ((*(u_int32_t *)&sin6->sin6_addr.s6_addr[j] & *(u_int32_t *)&m6p->sin6_addr.s6_addr[j])
2524 != *(u_int32_t *)&a6p->sin6_addr.s6_addr[j]) {
2530 dprintf("rejected in rule %d due to IP mismatch.\n", i);
2541 /* allow wildmatch */
2544 if (l2 > l1 || memcmp(cp, &name[l1 - l2], l2) != 0) {
2545 dprintf("rejected in rule %d due to name mismatch.\n", i);
2551 if (l2 != l1 || memcmp(cp, name, l1) != 0) {
2552 dprintf("rejected in rule %d due to name mismatch.\n", i);
2557 dprintf("accepted in rule %d.\n", i);
2558 return (1); /* hooray! */
2564 * Fairly similar to popen(3), but returns an open descriptor, as
2565 * opposed to a FILE *.
2568 p_open(const char *prog, pid_t *rpid)
2570 int pfd[2], nulldesc;
2572 sigset_t omask, mask;
2573 char *argv[4]; /* sh -c cmd NULL */
2576 if (pipe(pfd) == -1)
2578 if ((nulldesc = open(_PATH_DEVNULL, O_RDWR)) == -1)
2579 /* we are royally screwed anyway */
2583 sigaddset(&mask, SIGALRM);
2584 sigaddset(&mask, SIGHUP);
2585 sigprocmask(SIG_BLOCK, &mask, &omask);
2586 switch ((pid = fork())) {
2588 sigprocmask(SIG_SETMASK, &omask, 0);
2593 argv[0] = strdup("sh");
2594 argv[1] = strdup("-c");
2595 argv[2] = strdup(prog);
2597 if (argv[0] == NULL || argv[1] == NULL || argv[2] == NULL) {
2603 (void)setsid(); /* Avoid catching SIGHUPs. */
2606 * Throw away pending signals, and reset signal
2607 * behaviour to standard values.
2609 signal(SIGALRM, SIG_IGN);
2610 signal(SIGHUP, SIG_IGN);
2611 sigprocmask(SIG_SETMASK, &omask, 0);
2612 signal(SIGPIPE, SIG_DFL);
2613 signal(SIGQUIT, SIG_DFL);
2614 signal(SIGALRM, SIG_DFL);
2615 signal(SIGHUP, SIG_DFL);
2617 dup2(pfd[0], STDIN_FILENO);
2618 dup2(nulldesc, STDOUT_FILENO);
2619 dup2(nulldesc, STDERR_FILENO);
2622 (void)execvp(_PATH_BSHELL, argv);
2626 sigprocmask(SIG_SETMASK, &omask, 0);
2630 * Avoid blocking on a hung pipe. With O_NONBLOCK, we are
2631 * supposed to get an EWOULDBLOCK on writev(2), which is
2632 * caught by the logic above anyway, which will in turn close
2633 * the pipe, and fork a new logging subprocess if necessary.
2634 * The stale subprocess will be killed some time later unless
2635 * it terminated itself due to closing its input pipe (so we
2636 * get rid of really dead puppies).
2638 if (fcntl(pfd[1], F_SETFL, O_NONBLOCK) == -1) {
2640 (void)snprintf(errmsg, sizeof errmsg,
2641 "Warning: cannot change pipe to PID %d to "
2642 "non-blocking behaviour.",
2651 deadq_enter(pid_t pid, const char *name)
2657 * Be paranoid, if we can't signal the process, don't enter it
2658 * into the dead queue (perhaps it's already dead). If possible,
2659 * we try to fetch and log the child's status.
2661 if (kill(pid, 0) != 0) {
2662 if (waitpid(pid, &status, WNOHANG) > 0)
2663 log_deadchild(pid, status, name);
2667 p = malloc(sizeof(struct deadq_entry));
2674 p->dq_timeout = DQ_TIMO_INIT;
2675 TAILQ_INSERT_TAIL(&deadq_head, p, dq_entries);
2679 deadq_remove(pid_t pid)
2683 TAILQ_FOREACH(q, &deadq_head, dq_entries) {
2684 if (q->dq_pid == pid) {
2685 TAILQ_REMOVE(&deadq_head, q, dq_entries);
2695 log_deadchild(pid_t pid, int status, const char *name)
2701 errno = 0; /* Keep strerror() stuff out of logerror messages. */
2702 if (WIFSIGNALED(status)) {
2703 reason = "due to signal";
2704 code = WTERMSIG(status);
2706 reason = "with status";
2707 code = WEXITSTATUS(status);
2711 (void)snprintf(buf, sizeof buf,
2712 "Logging subprocess %d (%s) exited %s %d.",
2713 pid, name, reason, code);
2718 socksetup(int af, char *bindhostname)
2720 struct addrinfo hints, *res, *r;
2721 const char *bindservice;
2723 int error, maxs, *s, *socks;
2726 * We have to handle this case for backwards compatibility:
2727 * If there are two (or more) colons but no '[' and ']',
2728 * assume this is an inet6 address without a service.
2730 bindservice = "syslog";
2731 if (bindhostname != NULL) {
2733 if (*bindhostname == '[' &&
2734 (cp = strchr(bindhostname + 1, ']')) != NULL) {
2737 if (cp[1] == ':' && cp[2] != '\0')
2738 bindservice = cp + 2;
2741 cp = strchr(bindhostname, ':');
2742 if (cp != NULL && strchr(cp + 1, ':') == NULL) {
2745 bindservice = cp + 1;
2746 if (cp == bindhostname)
2747 bindhostname = NULL;
2754 memset(&hints, 0, sizeof(hints));
2755 hints.ai_flags = AI_PASSIVE;
2756 hints.ai_family = af;
2757 hints.ai_socktype = SOCK_DGRAM;
2758 error = getaddrinfo(bindhostname, bindservice, &hints, &res);
2760 logerror(gai_strerror(error));
2765 /* Count max number of sockets we may open */
2766 for (maxs = 0, r = res; r; r = r->ai_next, maxs++);
2767 socks = malloc((maxs+1) * sizeof(int));
2768 if (socks == NULL) {
2769 logerror("couldn't allocate memory for sockets");
2773 *socks = 0; /* num of sockets counter at start of array */
2775 for (r = res; r; r = r->ai_next) {
2777 *s = socket(r->ai_family, r->ai_socktype, r->ai_protocol);
2783 if (r->ai_family == AF_INET6) {
2784 if (setsockopt(*s, IPPROTO_IPV6, IPV6_V6ONLY,
2785 (char *)&on, sizeof (on)) < 0) {
2786 logerror("setsockopt");
2792 if (setsockopt(*s, SOL_SOCKET, SO_REUSEADDR,
2793 (char *)&on, sizeof (on)) < 0) {
2794 logerror("setsockopt");
2799 * RFC 3164 recommends that client side message
2800 * should come from the privileged syslogd port.
2802 * If the system administrator choose not to obey
2803 * this, we can skip the bind() step so that the
2804 * system will choose a port for us.
2807 if (bind(*s, r->ai_addr, r->ai_addrlen) < 0) {
2814 increase_rcvbuf(*s);
2818 dprintf("socksetup: new socket fd is %d\n", *s);
2836 increase_rcvbuf(int fd)
2838 socklen_t len, slen;
2842 if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &len, &slen) == 0) {
2843 if (len < RCVBUF_MINSIZE) {
2844 len = RCVBUF_MINSIZE;
2845 setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &len, sizeof(len));