2 * Copyright (c) 1983, 1988, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 static const char copyright[] =
32 "@(#) Copyright (c) 1983, 1988, 1993, 1994\n\
33 The Regents of the University of California. All rights reserved.\n";
38 static char sccsid[] = "@(#)syslogd.c 8.3 (Berkeley) 4/4/94";
42 #include <sys/cdefs.h>
43 __FBSDID("$FreeBSD$");
46 * syslogd -- log system messages
48 * This program implements a system log. It takes a series of lines.
49 * Each line may have a priority, signified as "<n>" as
50 * the first characters of the line. If this is
51 * not present, a default priority is used.
53 * To kill syslogd, send a signal 15 (terminate). A signal 1 (hup) will
54 * cause it to reread its configuration file.
58 * MAXLINE -- the maximum line length that can be handled.
59 * DEFUPRI -- the default priority for user messages
60 * DEFSPRI -- the default priority for kernel messages
63 * extensive changes by Ralph Campbell
64 * more extensive changes by Eric Allman (again)
65 * Extension to log by program name as well as facility and priority
67 * -u and -v by Harlan Stenn.
68 * Priority comparison code by Harlan Stenn.
71 /* Maximum number of characters in time of last occurrence */
73 #define MAXLINE 1024 /* maximum line length */
74 #define MAXSVLINE MAXLINE /* maximum saved line length */
75 #define DEFUPRI (LOG_USER|LOG_NOTICE)
76 #define DEFSPRI (LOG_KERN|LOG_CRIT)
77 #define TIMERINTVL 30 /* interval for checking flush, mark */
78 #define TTYMSGTIME 1 /* timeout passed to ttymsg */
79 #define RCVBUF_MINSIZE (80 * 1024) /* minimum size of dgram rcv buffer */
81 #include <sys/param.h>
82 #include <sys/ioctl.h>
84 #include <sys/queue.h>
85 #include <sys/resource.h>
86 #include <sys/socket.h>
88 #include <sys/syslimits.h>
93 #include <sys/types.h>
95 #include <netinet/in.h>
97 #include <arpa/inet.h>
111 #include <sysexits.h>
115 #include "pathnames.h"
119 #include <sys/syslog.h>
121 const char *ConfFile = _PATH_LOGCONF;
122 const char *PidFile = _PATH_LOGPID;
123 const char ctty[] = _PATH_CONSOLE;
124 static const char include_str[] = "include";
125 static const char include_ext[] = ".conf";
127 #define dprintf if (Debug) printf
129 #define MAXUNAMES 20 /* maximum number of user names */
133 * We have two default sockets, one with 666 permissions,
134 * and one for privileged programs.
140 STAILQ_ENTRY(funix) next;
142 struct funix funix_secure = { -1, _PATH_LOG_PRIV, S_IRUSR | S_IWUSR,
144 struct funix funix_default = { -1, _PATH_LOG, DEFFILEMODE,
147 STAILQ_HEAD(, funix) funixes = { &funix_default,
148 &(funix_secure.next.stqe_next) };
154 #define IGN_CONS 0x001 /* don't print on console */
155 #define SYNC_FILE 0x002 /* do fsync on file after printing */
156 #define ADDDATE 0x004 /* add a date to the message */
157 #define MARK 0x008 /* this message is a mark */
158 #define ISKERNEL 0x010 /* kernel generated message */
161 * This structure represents the files that will have log
163 * We require f_file to be valid if f_type is F_FILE, F_CONSOLE, F_TTY
164 * or if f_type is F_PIPE and f_pid > 0.
168 struct filed *f_next; /* next in linked list */
169 short f_type; /* entry type, see below */
170 short f_file; /* file descriptor */
171 time_t f_time; /* time this was last written */
172 char *f_host; /* host from which to recd. */
173 u_char f_pmask[LOG_NFACILITIES+1]; /* priority mask */
174 u_char f_pcmp[LOG_NFACILITIES+1]; /* compare priority */
178 char *f_program; /* program this applies to */
180 char f_uname[MAXUNAMES][MAXLOGNAME];
182 char f_hname[MAXHOSTNAMELEN];
183 struct addrinfo *f_addr;
185 } f_forw; /* forwarding address */
186 char f_fname[MAXPATHLEN];
188 char f_pname[MAXPATHLEN];
192 char f_prevline[MAXSVLINE]; /* last message logged */
193 char f_lasttime[MAXDATELEN]; /* time of last occurrence */
194 char f_prevhost[MAXHOSTNAMELEN]; /* host from which recd. */
195 int f_prevpri; /* pri of f_prevline */
196 int f_prevlen; /* length of f_prevline */
197 int f_prevcount; /* repetition cnt of prevline */
198 u_int f_repeatcount; /* number of "repeated" msgs */
199 int f_flags; /* file-specific flags */
200 #define FFLAG_SYNC 0x01
201 #define FFLAG_NEEDSYNC 0x02
205 * Queue of about-to-be dead processes we should watch out for.
208 TAILQ_HEAD(stailhead, deadq_entry) deadq_head;
209 struct stailhead *deadq_headp;
214 TAILQ_ENTRY(deadq_entry) dq_entries;
218 * The timeout to apply to processes waiting on the dead queue. Unit
219 * of measure is `mark intervals', i.e. 20 minutes by default.
220 * Processes on the dead queue will be terminated after that time.
223 #define DQ_TIMO_INIT 2
225 typedef struct deadq_entry *dq_t;
229 * Struct to hold records of network addresses that are allowed to log
237 struct sockaddr_storage addr;
238 struct sockaddr_storage mask;
242 #define a_addr u.numeric.addr
243 #define a_mask u.numeric.mask
244 #define a_name u.name
249 * Intervals at which we flush out "message repeated" messages,
250 * in seconds after previous message is logged. After each flush,
251 * we move to the next interval until we reach the largest.
253 int repeatinterval[] = { 30, 120, 600 }; /* # of secs before flush */
254 #define MAXREPEAT ((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1)
255 #define REPEATTIME(f) ((f)->f_time + repeatinterval[(f)->f_repeatcount])
256 #define BACKOFF(f) { if (++(f)->f_repeatcount > MAXREPEAT) \
257 (f)->f_repeatcount = MAXREPEAT; \
260 /* values for f_type */
261 #define F_UNUSED 0 /* unused entry */
262 #define F_FILE 1 /* regular file */
263 #define F_TTY 2 /* terminal */
264 #define F_CONSOLE 3 /* console terminal */
265 #define F_FORW 4 /* remote machine */
266 #define F_USERS 5 /* list of users */
267 #define F_WALL 6 /* everyone logged on */
268 #define F_PIPE 7 /* pipe to program */
270 const char *TypeNames[8] = {
271 "UNUSED", "FILE", "TTY", "CONSOLE",
272 "FORW", "USERS", "WALL", "PIPE"
275 static struct filed *Files; /* Log files that we write to */
276 static struct filed consfile; /* Console */
278 static int Debug; /* debug flag */
279 static int Foreground = 0; /* Run in foreground, instead of daemonizing */
280 static int resolve = 1; /* resolve hostname */
281 static char LocalHostName[MAXHOSTNAMELEN]; /* our hostname */
282 static const char *LocalDomain; /* our local domain name */
283 static int *finet; /* Internet datagram socket */
284 static int fklog = -1; /* /dev/klog */
285 static int Initialized; /* set when we have initialized ourselves */
286 static int MarkInterval = 20 * 60; /* interval between marks in seconds */
287 static int MarkSeq; /* mark sequence number */
288 static int NoBind; /* don't bind() as suggested by RFC 3164 */
289 static int SecureMode; /* when true, receive only unix domain socks */
291 static int family = PF_UNSPEC; /* protocol family (IPv4, IPv6 or both) */
293 static int family = PF_INET; /* protocol family (IPv4 only) */
295 static int mask_C1 = 1; /* mask characters from 0x80 - 0x9F */
296 static int send_to_all; /* send message to all IPv4/IPv6 addresses */
297 static int use_bootfile; /* log entire bootfile for every kern msg */
298 static int no_compress; /* don't compress messages (1=pipes, 2=all) */
299 static int logflags = O_WRONLY|O_APPEND; /* flags used to open log files */
301 static char bootfile[MAXLINE+1]; /* booted kernel file */
303 struct allowedpeer *AllowedPeers; /* List of allowed peers */
304 static int NumAllowed; /* Number of entries in AllowedPeers */
305 static int RemoteAddDate; /* Always set the date on remote messages */
307 static int UniquePriority; /* Only log specified priority? */
308 static int LogFacPri; /* Put facility and priority in log message: */
309 /* 0=no, 1=numeric, 2=names */
310 static int KeepKernFac; /* Keep remotely logged kernel facility */
311 static int needdofsync = 0; /* Are any file(s) waiting to be fsynced? */
312 static struct pidfh *pfh;
314 volatile sig_atomic_t MarkSet, WantDie;
316 static int allowaddr(char *);
317 static void cfline(const char *, struct filed *,
318 const char *, const char *);
319 static const char *cvthname(struct sockaddr *);
320 static void deadq_enter(pid_t, const char *);
321 static int deadq_remove(pid_t);
322 static int decode(const char *, const CODE *);
323 static void die(int);
324 static void dodie(int);
325 static void dofsync(void);
326 static void domark(int);
327 static void fprintlog(struct filed *, int, const char *);
328 static int *socksetup(int, char *);
329 static void init(int);
330 static void logerror(const char *);
331 static void logmsg(int, const char *, const char *, int);
332 static void log_deadchild(pid_t, int, const char *);
333 static void markit(void);
334 static int skip_message(const char *, const char *, int);
335 static void printline(const char *, char *, int);
336 static void printsys(char *);
337 static int p_open(const char *, pid_t *);
338 static void readklog(void);
339 static void reapchild(int);
340 static void usage(void);
341 static int validate(struct sockaddr *, const char *);
342 static void unmapped(struct sockaddr *);
343 static void wallmsg(struct filed *, struct iovec *, const int iovlen);
344 static int waitdaemon(int, int, int);
345 static void timedout(int);
346 static void increase_rcvbuf(int);
349 close_filed(struct filed *f)
352 if (f == NULL || f->f_file == -1)
357 if (f->f_un.f_forw.f_addr) {
358 freeaddrinfo(f->f_un.f_forw.f_addr);
359 f->f_un.f_forw.f_addr = NULL;
366 f->f_type = F_UNUSED;
369 f->f_un.f_pipe.f_pid = 0;
372 (void)close(f->f_file);
377 main(int argc, char *argv[])
379 int ch, i, fdsrmax = 0, l;
380 struct sockaddr_un sunx, fromunix;
381 struct sockaddr_storage frominet;
383 char line[MAXLINE + 1];
386 struct timeval tv, *tvp;
387 struct sigaction sact;
388 struct funix *fx, *fx1;
390 pid_t ppid = 1, spid;
393 if (madvise(NULL, 0, MADV_PROTECT) != 0)
394 dprintf("madvise() failed: %s\n", strerror(errno));
397 while ((ch = getopt(argc, argv, "468Aa:b:cCdf:Fkl:m:nNop:P:sS:Tuv"))
414 case 'a': /* allow specific network addresses only */
415 if (allowaddr(optarg) == -1)
419 bindhostname = optarg;
427 case 'd': /* debug */
430 case 'f': /* configuration file */
433 case 'F': /* run in foreground instead of daemon */
436 case 'k': /* keep remote kern fac */
445 if (optarg[0] == '/') {
448 } else if ((name = strchr(optarg, ':')) != NULL) {
451 errx(1, "socket name must be absolute "
453 if (isdigit(*optarg)) {
454 perml = strtol(optarg, &ep, 8);
455 if (*ep || perml < 0 ||
456 perml & ~(S_IRWXU|S_IRWXG|S_IRWXO))
457 errx(1, "invalid mode %s, exiting",
459 mode = (mode_t )perml;
461 errx(1, "invalid mode %s, exiting",
463 } else /* doesn't begin with '/', and no ':' */
464 errx(1, "can't parse path %s", optarg);
466 if (strlen(name) >= sizeof(sunx.sun_path))
467 errx(1, "%s path too long, exiting", name);
468 if ((fx = malloc(sizeof(struct funix))) == NULL)
469 errx(1, "malloc failed");
473 STAILQ_INSERT_TAIL(&funixes, fx, next);
476 case 'm': /* mark interval */
477 MarkInterval = atoi(optarg) * 60;
490 if (strlen(optarg) >= sizeof(sunx.sun_path))
491 errx(1, "%s path too long, exiting", optarg);
492 funix_default.name = optarg;
494 case 'P': /* path for alt. PID */
497 case 's': /* no network mode */
500 case 'S': /* path for privileged originator */
501 if (strlen(optarg) >= sizeof(sunx.sun_path))
502 errx(1, "%s path too long, exiting", optarg);
503 funix_secure.name = optarg;
508 case 'u': /* only log specified priority */
511 case 'v': /* log facility and priority */
517 if ((argc -= optind) != 0)
520 pfh = pidfile_open(PidFile, 0600, &spid);
523 errx(1, "syslogd already running, pid: %d", spid);
524 warn("cannot open pid file");
527 if ((!Foreground) && (!Debug)) {
528 ppid = waitdaemon(0, 0, 30);
530 warn("could not become daemon");
541 consfile.f_type = F_CONSOLE;
542 (void)strlcpy(consfile.f_un.f_fname, ctty + sizeof _PATH_DEV - 1,
543 sizeof(consfile.f_un.f_fname));
544 (void)strlcpy(bootfile, getbootfile(), sizeof(bootfile));
545 (void)signal(SIGTERM, dodie);
546 (void)signal(SIGINT, Debug ? dodie : SIG_IGN);
547 (void)signal(SIGQUIT, Debug ? dodie : SIG_IGN);
549 * We don't want the SIGCHLD and SIGHUP handlers to interfere
550 * with each other; they are likely candidates for being called
551 * simultaneously (SIGHUP closes pipe descriptor, process dies,
555 sigaddset(&mask, SIGHUP);
556 sact.sa_handler = reapchild;
558 sact.sa_flags = SA_RESTART;
559 (void)sigaction(SIGCHLD, &sact, NULL);
560 (void)signal(SIGALRM, domark);
561 (void)signal(SIGPIPE, SIG_IGN); /* We'll catch EPIPE instead. */
562 (void)alarm(TIMERINTVL);
564 TAILQ_INIT(&deadq_head);
567 #define SUN_LEN(unp) (strlen((unp)->sun_path) + 2)
569 STAILQ_FOREACH_SAFE(fx, &funixes, next, fx1) {
570 (void)unlink(fx->name);
571 memset(&sunx, 0, sizeof(sunx));
572 sunx.sun_family = AF_LOCAL;
573 (void)strlcpy(sunx.sun_path, fx->name, sizeof(sunx.sun_path));
574 fx->s = socket(PF_LOCAL, SOCK_DGRAM, 0);
576 bind(fx->s, (struct sockaddr *)&sunx, SUN_LEN(&sunx)) < 0 ||
577 chmod(fx->name, fx->mode) < 0) {
578 (void)snprintf(line, sizeof line,
579 "cannot create %s", fx->name);
581 dprintf("cannot create %s (%d)\n", fx->name, errno);
582 if (fx == &funix_default || fx == &funix_secure)
585 STAILQ_REMOVE(&funixes, fx, funix, next);
589 increase_rcvbuf(fx->s);
592 finet = socksetup(family, bindhostname);
596 for (i = 0; i < *finet; i++) {
597 if (shutdown(finet[i+1], SHUT_RD) < 0 &&
599 logerror("shutdown");
605 dprintf("listening on inet and/or inet6 socket\n");
607 dprintf("sending on inet and/or inet6 socket\n");
610 if ((fklog = open(_PATH_KLOG, O_RDONLY, 0)) >= 0)
611 if (fcntl(fklog, F_SETFL, O_NONBLOCK) < 0)
614 dprintf("can't open %s (%d)\n", _PATH_KLOG, errno);
616 /* tuck my process id away */
619 dprintf("off & running....\n");
622 /* prevent SIGHUP and SIGCHLD handlers from running in parallel */
624 sigaddset(&mask, SIGCHLD);
625 sact.sa_handler = init;
627 sact.sa_flags = SA_RESTART;
628 (void)sigaction(SIGHUP, &sact, NULL);
631 tv.tv_sec = tv.tv_usec = 0;
633 if (fklog != -1 && fklog > fdsrmax)
635 if (finet && !SecureMode) {
636 for (i = 0; i < *finet; i++) {
637 if (finet[i+1] != -1 && finet[i+1] > fdsrmax)
638 fdsrmax = finet[i+1];
641 STAILQ_FOREACH(fx, &funixes, next)
645 fdsr = (fd_set *)calloc(howmany(fdsrmax+1, NFDBITS),
648 errx(1, "calloc fd_set");
656 bzero(fdsr, howmany(fdsrmax+1, NFDBITS) *
661 if (finet && !SecureMode) {
662 for (i = 0; i < *finet; i++) {
663 if (finet[i+1] != -1)
664 FD_SET(finet[i+1], fdsr);
667 STAILQ_FOREACH(fx, &funixes, next)
670 i = select(fdsrmax+1, fdsr, NULL, NULL,
671 needdofsync ? &tv : tvp);
687 if (fklog != -1 && FD_ISSET(fklog, fdsr))
689 if (finet && !SecureMode) {
690 for (i = 0; i < *finet; i++) {
691 if (FD_ISSET(finet[i+1], fdsr)) {
692 len = sizeof(frominet);
693 l = recvfrom(finet[i+1], line, MAXLINE,
694 0, (struct sockaddr *)&frominet,
698 hname = cvthname((struct sockaddr *)&frominet);
699 unmapped((struct sockaddr *)&frominet);
700 if (validate((struct sockaddr *)&frominet, hname))
701 printline(hname, line, RemoteAddDate ? ADDDATE : 0);
702 } else if (l < 0 && errno != EINTR)
703 logerror("recvfrom inet");
707 STAILQ_FOREACH(fx, &funixes, next) {
708 if (FD_ISSET(fx->s, fdsr)) {
709 len = sizeof(fromunix);
710 l = recvfrom(fx->s, line, MAXLINE, 0,
711 (struct sockaddr *)&fromunix, &len);
714 printline(LocalHostName, line, 0);
715 } else if (l < 0 && errno != EINTR)
716 logerror("recvfrom unix");
725 unmapped(struct sockaddr *sa)
727 struct sockaddr_in6 *sin6;
728 struct sockaddr_in sin4;
730 if (sa->sa_family != AF_INET6)
732 if (sa->sa_len != sizeof(struct sockaddr_in6) ||
733 sizeof(sin4) > sa->sa_len)
735 sin6 = (struct sockaddr_in6 *)sa;
736 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
739 memset(&sin4, 0, sizeof(sin4));
740 sin4.sin_family = AF_INET;
741 sin4.sin_len = sizeof(struct sockaddr_in);
742 memcpy(&sin4.sin_addr, &sin6->sin6_addr.s6_addr[12],
743 sizeof(sin4.sin_addr));
744 sin4.sin_port = sin6->sin6_port;
746 memcpy(sa, &sin4, sin4.sin_len);
753 fprintf(stderr, "%s\n%s\n%s\n%s\n",
754 "usage: syslogd [-468ACcdFknosTuv] [-a allowed_peer]",
755 " [-b bind_address] [-f config_file]",
756 " [-l [mode:]path] [-m mark_interval]",
757 " [-P pid_file] [-p log_socket]");
762 * Take a raw input line, decode the message, and print the message
763 * on the appropriate log files.
766 printline(const char *hname, char *msg, int flags)
771 char line[MAXLINE + 1];
773 /* test for special codes */
778 n = strtol(p + 1, &q, 10);
779 if (*q == '>' && n >= 0 && n < INT_MAX && errno == 0) {
784 if (pri &~ (LOG_FACMASK|LOG_PRIMASK))
788 * Don't allow users to log kernel messages.
789 * NOTE: since LOG_KERN == 0 this will also match
790 * messages with no facility specified.
792 if ((pri & LOG_FACMASK) == LOG_KERN && !KeepKernFac)
793 pri = LOG_MAKEPRI(LOG_USER, LOG_PRI(pri));
797 while ((c = (unsigned char)*p++) != '\0' &&
798 q < &line[sizeof(line) - 4]) {
799 if (mask_C1 && (c & 0x80) && c < 0xA0) {
804 if (isascii(c) && iscntrl(c)) {
807 } else if (c == '\t') {
819 logmsg(pri, line, hname, flags);
823 * Read /dev/klog while data are available, split into lines.
828 char *p, *q, line[MAXLINE + 1];
833 i = read(fklog, line + len, MAXLINE - 1 - len);
835 line[i + len] = '\0';
837 if (i < 0 && errno != EINTR && errno != EAGAIN) {
844 for (p = line; (q = strchr(p, '\n')) != NULL; p = q + 1) {
849 if (len >= MAXLINE - 1) {
854 memmove(line, p, len + 1);
861 * Take a raw input line from /dev/klog, format similar to syslog().
868 int flags, isprintf, pri;
870 flags = ISKERNEL | SYNC_FILE | ADDDATE; /* fsync after write */
876 n = strtol(p + 1, &q, 10);
877 if (*q == '>' && n >= 0 && n < INT_MAX && errno == 0) {
884 * Kernel printf's and LOG_CONSOLE messages have been displayed
885 * on the console already.
887 if (isprintf || (pri & LOG_FACMASK) == LOG_CONSOLE)
889 if (pri &~ (LOG_FACMASK|LOG_PRIMASK))
891 logmsg(pri, p, LocalHostName, flags);
897 * Match a program or host name against a specification.
898 * Return a non-0 value if the message must be ignored
899 * based on the specification.
902 skip_message(const char *name, const char *spec, int checkcase)
907 /* Behaviour on explicit match */
922 s = strstr (spec, name);
924 s = strcasestr (spec, name);
927 prev = (s == spec ? ',' : *(s - 1));
928 next = *(s + strlen (name));
930 if (prev == ',' && (next == '\0' || next == ','))
931 /* Explicit match: skip iff the spec is an
936 /* No explicit match for this name: skip the message iff
937 the spec is an inclusive one. */
942 * Log a message to the appropriate log files, users, etc. based on
946 logmsg(int pri, const char *msg, const char *from, int flags)
949 int i, fac, msglen, omask, prilev;
950 const char *timestamp;
951 char prog[NAME_MAX+1];
954 dprintf("logmsg: pri %o, flags %x, from %s, msg %s\n",
955 pri, flags, from, msg);
957 omask = sigblock(sigmask(SIGHUP)|sigmask(SIGALRM));
960 * Check to see if msg looks non-standard.
962 msglen = strlen(msg);
963 if (msglen < MAXDATELEN || msg[3] != ' ' || msg[6] != ' ' ||
964 msg[9] != ':' || msg[12] != ':' || msg[15] != ' ')
968 if (flags & ADDDATE) {
969 timestamp = ctime(&now) + 4;
973 msglen -= MAXDATELEN;
976 /* skip leading blanks */
977 while (isspace(*msg)) {
982 /* extract facility and priority level */
984 fac = LOG_NFACILITIES;
988 /* Check maximum facility number. */
989 if (fac > LOG_NFACILITIES) {
990 (void)sigsetmask(omask);
994 prilev = LOG_PRI(pri);
996 /* extract program name */
997 for (i = 0; i < NAME_MAX; i++) {
998 if (!isprint(msg[i]) || msg[i] == ':' || msg[i] == '[' ||
999 msg[i] == '/' || isspace(msg[i]))
1005 /* add kernel prefix for kernel messages */
1006 if (flags & ISKERNEL) {
1007 snprintf(buf, sizeof(buf), "%s: %s",
1008 use_bootfile ? bootfile : "kernel", msg);
1010 msglen = strlen(buf);
1013 /* log the message to the particular outputs */
1017 * Open in non-blocking mode to avoid hangs during open
1018 * and close(waiting for the port to drain).
1020 f->f_file = open(ctty, O_WRONLY | O_NONBLOCK, 0);
1022 if (f->f_file >= 0) {
1023 (void)strlcpy(f->f_lasttime, timestamp,
1024 sizeof(f->f_lasttime));
1025 fprintlog(f, flags, msg);
1029 (void)sigsetmask(omask);
1032 for (f = Files; f; f = f->f_next) {
1033 /* skip messages that are incorrect priority */
1034 if (!(((f->f_pcmp[fac] & PRI_EQ) && (f->f_pmask[fac] == prilev))
1035 ||((f->f_pcmp[fac] & PRI_LT) && (f->f_pmask[fac] < prilev))
1036 ||((f->f_pcmp[fac] & PRI_GT) && (f->f_pmask[fac] > prilev))
1038 || f->f_pmask[fac] == INTERNAL_NOPRI)
1041 /* skip messages with the incorrect hostname */
1042 if (skip_message(from, f->f_host, 0))
1045 /* skip messages with the incorrect program name */
1046 if (skip_message(prog, f->f_program, 1))
1049 /* skip message to console if it has already been printed */
1050 if (f->f_type == F_CONSOLE && (flags & IGN_CONS))
1053 /* don't output marks to recently written files */
1054 if ((flags & MARK) && (now - f->f_time) < MarkInterval / 2)
1058 * suppress duplicate lines to this file
1060 if (no_compress - (f->f_type != F_PIPE) < 1 &&
1061 (flags & MARK) == 0 && msglen == f->f_prevlen &&
1062 !strcmp(msg, f->f_prevline) &&
1063 !strcasecmp(from, f->f_prevhost)) {
1064 (void)strlcpy(f->f_lasttime, timestamp,
1065 sizeof(f->f_lasttime));
1067 dprintf("msg repeated %d times, %ld sec of %d\n",
1068 f->f_prevcount, (long)(now - f->f_time),
1069 repeatinterval[f->f_repeatcount]);
1071 * If domark would have logged this by now,
1072 * flush it now (so we don't hold isolated messages),
1073 * but back off so we'll flush less often
1076 if (now > REPEATTIME(f)) {
1077 fprintlog(f, flags, (char *)NULL);
1081 /* new line, save it */
1083 fprintlog(f, 0, (char *)NULL);
1084 f->f_repeatcount = 0;
1086 (void)strlcpy(f->f_lasttime, timestamp,
1087 sizeof(f->f_lasttime));
1088 (void)strlcpy(f->f_prevhost, from,
1089 sizeof(f->f_prevhost));
1090 if (msglen < MAXSVLINE) {
1091 f->f_prevlen = msglen;
1092 (void)strlcpy(f->f_prevline, msg, sizeof(f->f_prevline));
1093 fprintlog(f, flags, (char *)NULL);
1095 f->f_prevline[0] = 0;
1097 fprintlog(f, flags, msg);
1101 (void)sigsetmask(omask);
1109 for (f = Files; f; f = f->f_next) {
1110 if ((f->f_type == F_FILE) &&
1111 (f->f_flags & FFLAG_NEEDSYNC)) {
1112 f->f_flags &= ~FFLAG_NEEDSYNC;
1113 (void)fsync(f->f_file);
1120 fprintlog(struct filed *f, int flags, const char *msg)
1122 struct iovec iov[IOV_SIZE];
1125 int i, l, lsent = 0;
1126 char line[MAXLINE + 1], repbuf[80], greetings[200], *wmsg = NULL;
1127 char nul[] = "", space[] = " ", lf[] = "\n", crlf[] = "\r\n";
1131 if (f->f_type == F_WALL) {
1132 v->iov_base = greetings;
1133 /* The time displayed is not synchornized with the other log
1134 * destinations (like messages). Following fragment was using
1135 * ctime(&now), which was updating the time every 30 sec.
1136 * With f_lasttime, time is synchronized correctly.
1138 v->iov_len = snprintf(greetings, sizeof greetings,
1139 "\r\n\7Message from syslogd@%s at %.24s ...\r\n",
1140 f->f_prevhost, f->f_lasttime);
1141 if (v->iov_len >= sizeof greetings)
1142 v->iov_len = sizeof greetings - 1;
1148 v->iov_base = f->f_lasttime;
1149 v->iov_len = strlen(f->f_lasttime);
1151 v->iov_base = space;
1157 static char fp_buf[30]; /* Hollow laugh */
1158 int fac = f->f_prevpri & LOG_FACMASK;
1159 int pri = LOG_PRI(f->f_prevpri);
1160 const char *f_s = NULL;
1161 char f_n[5]; /* Hollow laugh */
1162 const char *p_s = NULL;
1163 char p_n[5]; /* Hollow laugh */
1165 if (LogFacPri > 1) {
1168 for (c = facilitynames; c->c_name; c++) {
1169 if (c->c_val == fac) {
1174 for (c = prioritynames; c->c_name; c++) {
1175 if (c->c_val == pri) {
1182 snprintf(f_n, sizeof f_n, "%d", LOG_FAC(fac));
1186 snprintf(p_n, sizeof p_n, "%d", pri);
1189 snprintf(fp_buf, sizeof fp_buf, "<%s.%s> ", f_s, p_s);
1190 v->iov_base = fp_buf;
1191 v->iov_len = strlen(fp_buf);
1198 v->iov_base = f->f_prevhost;
1199 v->iov_len = strlen(v->iov_base);
1201 v->iov_base = space;
1206 wmsg = strdup(msg); /* XXX iov_base needs a `const' sibling. */
1212 v->iov_len = strlen(msg);
1213 } else if (f->f_prevcount > 1) {
1214 v->iov_base = repbuf;
1215 v->iov_len = snprintf(repbuf, sizeof repbuf,
1216 "last message repeated %d times", f->f_prevcount);
1218 v->iov_base = f->f_prevline;
1219 v->iov_len = f->f_prevlen;
1223 dprintf("Logging to %s", TypeNames[f->f_type]);
1226 switch (f->f_type) {
1233 port = (int)ntohs(((struct sockaddr_in *)
1234 (f->f_un.f_forw.f_addr->ai_addr))->sin_port);
1236 dprintf(" %s:%d\n", f->f_un.f_forw.f_hname, port);
1238 dprintf(" %s\n", f->f_un.f_forw.f_hname);
1240 /* check for local vs remote messages */
1241 if (strcasecmp(f->f_prevhost, LocalHostName))
1242 l = snprintf(line, sizeof line - 1,
1243 "<%d>%.15s Forwarded from %s: %s",
1244 f->f_prevpri, (char *)iov[0].iov_base,
1245 f->f_prevhost, (char *)iov[5].iov_base);
1247 l = snprintf(line, sizeof line - 1, "<%d>%.15s %s",
1248 f->f_prevpri, (char *)iov[0].iov_base,
1249 (char *)iov[5].iov_base);
1252 else if (l > MAXLINE)
1256 for (r = f->f_un.f_forw.f_addr; r; r = r->ai_next) {
1257 for (i = 0; i < *finet; i++) {
1260 * should we check AF first, or just
1261 * trial and error? FWD
1264 address_family_of(finet[i+1]))
1266 lsent = sendto(finet[i+1], line, l, 0,
1267 r->ai_addr, r->ai_addrlen);
1271 if (lsent == l && !send_to_all)
1274 dprintf("lsent/l: %d/%d\n", lsent, l);
1289 /* case ENOTSOCK: */
1291 /* case EMSGSIZE: */
1294 /* case ECONNREFUSED: */
1296 dprintf("removing entry: errno=%d\n", e);
1297 f->f_type = F_UNUSED;
1305 dprintf(" %s\n", f->f_un.f_fname);
1308 if (writev(f->f_file, iov, IOV_SIZE) < 0) {
1310 * If writev(2) fails for potentially transient errors
1311 * like the filesystem being full, ignore it.
1312 * Otherwise remove this logfile from the list.
1314 if (errno != ENOSPC) {
1318 logerror(f->f_un.f_fname);
1320 } else if ((flags & SYNC_FILE) && (f->f_flags & FFLAG_SYNC)) {
1321 f->f_flags |= FFLAG_NEEDSYNC;
1327 dprintf(" %s\n", f->f_un.f_pipe.f_pname);
1330 if (f->f_un.f_pipe.f_pid == 0) {
1331 if ((f->f_file = p_open(f->f_un.f_pipe.f_pname,
1332 &f->f_un.f_pipe.f_pid)) < 0) {
1333 logerror(f->f_un.f_pipe.f_pname);
1337 if (writev(f->f_file, iov, IOV_SIZE) < 0) {
1341 deadq_enter(f->f_un.f_pipe.f_pid,
1342 f->f_un.f_pipe.f_pname);
1344 logerror(f->f_un.f_pipe.f_pname);
1349 if (flags & IGN_CONS) {
1350 dprintf(" (ignored)\n");
1356 dprintf(" %s%s\n", _PATH_DEV, f->f_un.f_fname);
1360 errno = 0; /* ttymsg() only sometimes returns an errno */
1361 if ((msgret = ttymsg(iov, IOV_SIZE, f->f_un.f_fname, 10))) {
1362 f->f_type = F_UNUSED;
1372 wallmsg(f, iov, IOV_SIZE);
1380 * WALLMSG -- Write a message to the world at large
1382 * Write the specified message to either the entire
1383 * world, or a list of approved users.
1386 wallmsg(struct filed *f, struct iovec *iov, const int iovlen)
1388 static int reenter; /* avoid calling ourselves */
1397 while ((ut = getutxent()) != NULL) {
1398 if (ut->ut_type != USER_PROCESS)
1400 if (f->f_type == F_WALL) {
1401 if ((p = ttymsg(iov, iovlen, ut->ut_line,
1402 TTYMSGTIME)) != NULL) {
1403 errno = 0; /* already in msg */
1408 /* should we send the message to this user? */
1409 for (i = 0; i < MAXUNAMES; i++) {
1410 if (!f->f_un.f_uname[i][0])
1412 if (!strcmp(f->f_un.f_uname[i], ut->ut_user)) {
1413 if ((p = ttymsg(iov, iovlen, ut->ut_line,
1414 TTYMSGTIME)) != NULL) {
1415 errno = 0; /* already in msg */
1427 reapchild(int signo __unused)
1433 while ((pid = wait3(&status, WNOHANG, (struct rusage *)NULL)) > 0) {
1435 /* Don't tell while we are initting. */
1438 /* First, look if it's a process from the dead queue. */
1439 if (deadq_remove(pid))
1442 /* Now, look in list of active processes. */
1443 for (f = Files; f; f = f->f_next)
1444 if (f->f_type == F_PIPE &&
1445 f->f_un.f_pipe.f_pid == pid) {
1447 log_deadchild(pid, status,
1448 f->f_un.f_pipe.f_pname);
1457 * Return a printable representation of a host address.
1460 cvthname(struct sockaddr *f)
1463 sigset_t omask, nmask;
1464 static char hname[NI_MAXHOST], ip[NI_MAXHOST];
1466 error = getnameinfo((struct sockaddr *)f,
1467 ((struct sockaddr *)f)->sa_len,
1468 ip, sizeof ip, NULL, 0, NI_NUMERICHOST);
1469 dprintf("cvthname(%s)\n", ip);
1472 dprintf("Malformed from address %s\n", gai_strerror(error));
1478 sigemptyset(&nmask);
1479 sigaddset(&nmask, SIGHUP);
1480 sigprocmask(SIG_BLOCK, &nmask, &omask);
1481 error = getnameinfo((struct sockaddr *)f,
1482 ((struct sockaddr *)f)->sa_len,
1483 hname, sizeof hname, NULL, 0, NI_NAMEREQD);
1484 sigprocmask(SIG_SETMASK, &omask, NULL);
1486 dprintf("Host name for your address (%s) unknown\n", ip);
1490 if (hl > 0 && hname[hl-1] == '.')
1492 trimdomain(hname, hl);
1504 domark(int signo __unused)
1511 * Print syslogd errors some place.
1514 logerror(const char *type)
1517 static int recursed = 0;
1519 /* If there's an error while trying to log an error, give up. */
1525 sizeof buf, "syslogd: %s: %s", type, strerror(errno));
1527 (void)snprintf(buf, sizeof buf, "syslogd: %s", type);
1529 dprintf("%s\n", buf);
1530 logmsg(LOG_SYSLOG|LOG_ERR, buf, LocalHostName, ADDDATE);
1539 int was_initialized;
1542 was_initialized = Initialized;
1543 Initialized = 0; /* Don't log SIGCHLDs. */
1544 for (f = Files; f != NULL; f = f->f_next) {
1545 /* flush any pending output */
1547 fprintlog(f, 0, (char *)NULL);
1548 if (f->f_type == F_PIPE && f->f_un.f_pipe.f_pid > 0)
1551 Initialized = was_initialized;
1553 dprintf("syslogd: exiting on signal %d\n", signo);
1554 (void)snprintf(buf, sizeof(buf), "exiting on signal %d", signo);
1558 STAILQ_FOREACH(fx, &funixes, next)
1559 (void)unlink(fx->name);
1560 pidfile_remove(pfh);
1566 configfiles(const struct dirent *dp)
1571 if (dp->d_name[0] == '.')
1574 ext_len = sizeof(include_ext) -1;
1576 if (dp->d_namlen <= ext_len)
1579 p = &dp->d_name[dp->d_namlen - ext_len];
1580 if (strcmp(p, include_ext) != 0)
1587 readconfigfile(FILE *cf, struct filed **nextp, int allow_includes)
1591 struct dirent **ent;
1592 char cline[LINE_MAX];
1593 char host[MAXHOSTNAMELEN];
1594 char prog[LINE_MAX];
1595 char file[MAXPATHLEN];
1601 * Foreach line in the conf table, open that file.
1604 include_len = sizeof(include_str) -1;
1605 (void)strlcpy(host, "*", sizeof(host));
1606 (void)strlcpy(prog, "*", sizeof(prog));
1607 while (fgets(cline, sizeof(cline), cf) != NULL) {
1609 * check for end-of-section, comments, strip off trailing
1610 * spaces and newline character. #!prog is treated specially:
1611 * following lines apply only to that program.
1613 for (p = cline; isspace(*p); ++p)
1617 if (allow_includes &&
1618 strncmp(p, include_str, include_len) == 0 &&
1619 isspace(p[include_len])) {
1624 while (*tmp != '\0' && !isspace(*tmp))
1627 dprintf("Trying to include files in '%s'\n", p);
1628 nents = scandir(p, &ent, configfiles, alphasort);
1630 dprintf("Unable to open '%s': %s\n", p,
1634 for (i = 0; i < nents; i++) {
1635 if (snprintf(file, sizeof(file), "%s/%s", p,
1636 ent[i]->d_name) >= (int)sizeof(file)) {
1637 dprintf("ignoring path too long: "
1638 "'%s/%s'\n", p, ent[i]->d_name);
1643 cf2 = fopen(file, "r");
1646 dprintf("reading %s\n", file);
1647 readconfigfile(cf2, nextp, 0);
1655 if (*p != '!' && *p != '+' && *p != '-')
1658 if (*p == '+' || *p == '-') {
1662 if ((!*p) || (*p == '*')) {
1663 (void)strlcpy(host, "*", sizeof(host));
1668 for (i = 1; i < MAXHOSTNAMELEN - 1; i++) {
1669 if (!isalnum(*p) && *p != '.' && *p != '-'
1670 && *p != ',' && *p != ':' && *p != '%')
1679 while (isspace(*p)) p++;
1680 if ((!*p) || (*p == '*')) {
1681 (void)strlcpy(prog, "*", sizeof(prog));
1684 for (i = 0; i < LINE_MAX - 1; i++) {
1685 if (!isprint(p[i]) || isspace(p[i]))
1692 for (p = cline + 1; *p != '\0'; p++) {
1695 if (*(p - 1) == '\\') {
1703 for (i = strlen(cline) - 1; i >= 0 && isspace(cline[i]); i--)
1705 f = (struct filed *)calloc(1, sizeof(*f));
1712 cfline(cline, f, prog, host);
1717 * INIT -- Initialize syslogd from configuration table
1724 struct filed *f, *next, **nextp;
1726 char oldLocalHostName[MAXHOSTNAMELEN];
1727 char hostMsg[2*MAXHOSTNAMELEN+40];
1728 char bootfileMsg[LINE_MAX];
1733 * Load hostname (may have changed).
1736 (void)strlcpy(oldLocalHostName, LocalHostName,
1737 sizeof(oldLocalHostName));
1738 if (gethostname(LocalHostName, sizeof(LocalHostName)))
1739 err(EX_OSERR, "gethostname() failed");
1740 if ((p = strchr(LocalHostName, '.')) != NULL) {
1748 * Close all open log files.
1751 for (f = Files; f != NULL; f = next) {
1752 /* flush any pending output */
1754 fprintlog(f, 0, (char *)NULL);
1756 switch (f->f_type) {
1765 deadq_enter(f->f_un.f_pipe.f_pid,
1766 f->f_un.f_pipe.f_pname);
1770 if (f->f_program) free(f->f_program);
1771 if (f->f_host) free(f->f_host);
1777 /* open the configuration file */
1778 if ((cf = fopen(ConfFile, "r")) == NULL) {
1779 dprintf("cannot open %s\n", ConfFile);
1780 *nextp = (struct filed *)calloc(1, sizeof(*f));
1781 if (*nextp == NULL) {
1785 cfline("*.ERR\t/dev/console", *nextp, "*", "*");
1786 (*nextp)->f_next = (struct filed *)calloc(1, sizeof(*f));
1787 if ((*nextp)->f_next == NULL) {
1791 cfline("*.PANIC\t*", (*nextp)->f_next, "*", "*");
1796 readconfigfile(cf, &Files, 1);
1798 /* close the configuration file */
1805 for (f = Files; f; f = f->f_next) {
1806 for (i = 0; i <= LOG_NFACILITIES; i++)
1807 if (f->f_pmask[i] == INTERNAL_NOPRI)
1810 printf("%d ", f->f_pmask[i]);
1811 printf("%s: ", TypeNames[f->f_type]);
1812 switch (f->f_type) {
1814 printf("%s", f->f_un.f_fname);
1819 printf("%s%s", _PATH_DEV, f->f_un.f_fname);
1823 port = (int)ntohs(((struct sockaddr_in *)
1824 (f->f_un.f_forw.f_addr->ai_addr))->sin_port);
1827 f->f_un.f_forw.f_hname, port);
1829 printf("%s", f->f_un.f_forw.f_hname);
1834 printf("%s", f->f_un.f_pipe.f_pname);
1838 for (i = 0; i < MAXUNAMES && *f->f_un.f_uname[i]; i++)
1839 printf("%s, ", f->f_un.f_uname[i]);
1843 printf(" (%s)", f->f_program);
1848 logmsg(LOG_SYSLOG|LOG_INFO, "syslogd: restart", LocalHostName, ADDDATE);
1849 dprintf("syslogd: restarted\n");
1851 * Log a change in hostname, but only on a restart.
1853 if (signo != 0 && strcmp(oldLocalHostName, LocalHostName) != 0) {
1854 (void)snprintf(hostMsg, sizeof(hostMsg),
1855 "syslogd: hostname changed, \"%s\" to \"%s\"",
1856 oldLocalHostName, LocalHostName);
1857 logmsg(LOG_SYSLOG|LOG_INFO, hostMsg, LocalHostName, ADDDATE);
1858 dprintf("%s\n", hostMsg);
1861 * Log the kernel boot file if we aren't going to use it as
1862 * the prefix, and if this is *not* a restart.
1864 if (signo == 0 && !use_bootfile) {
1865 (void)snprintf(bootfileMsg, sizeof(bootfileMsg),
1866 "syslogd: kernel boot file is %s", bootfile);
1867 logmsg(LOG_KERN|LOG_INFO, bootfileMsg, LocalHostName, ADDDATE);
1868 dprintf("%s\n", bootfileMsg);
1873 * Crack a configuration file line
1876 cfline(const char *line, struct filed *f, const char *prog, const char *host)
1878 struct addrinfo hints, *res;
1879 int error, i, pri, syncfile;
1882 char buf[MAXLINE], ebuf[100];
1884 dprintf("cfline(\"%s\", f, \"%s\", \"%s\")\n", line, prog, host);
1886 errno = 0; /* keep strerror() stuff out of logerror messages */
1888 /* clear out file entry */
1889 memset(f, 0, sizeof(*f));
1890 for (i = 0; i <= LOG_NFACILITIES; i++)
1891 f->f_pmask[i] = INTERNAL_NOPRI;
1893 /* save hostname if any */
1894 if (host && *host == '*')
1899 f->f_host = strdup(host);
1900 if (f->f_host == NULL) {
1904 hl = strlen(f->f_host);
1905 if (hl > 0 && f->f_host[hl-1] == '.')
1906 f->f_host[--hl] = '\0';
1907 trimdomain(f->f_host, hl);
1910 /* save program name if any */
1911 if (prog && *prog == '*')
1914 f->f_program = strdup(prog);
1915 if (f->f_program == NULL) {
1921 /* scan through the list of selectors */
1922 for (p = line; *p && *p != '\t' && *p != ' ';) {
1927 /* find the end of this facility name list */
1928 for (q = p; *q && *q != '\t' && *q != ' ' && *q++ != '.'; )
1931 /* get the priority comparison */
1959 /* collect priority name */
1960 for (bp = buf; *q && !strchr("\t,; ", *q); )
1965 while (strchr(",;", *q))
1968 /* decode priority name */
1971 pri_cmp = PRI_LT | PRI_EQ | PRI_GT;
1973 /* Ignore trailing spaces. */
1974 for (i = strlen(buf) - 1; i >= 0 && buf[i] == ' '; i--)
1977 pri = decode(buf, prioritynames);
1980 (void)snprintf(ebuf, sizeof ebuf,
1981 "unknown priority name \"%s\"", buf);
1987 pri_cmp = (UniquePriority)
1992 pri_cmp ^= PRI_LT | PRI_EQ | PRI_GT;
1994 /* scan facilities */
1995 while (*p && !strchr("\t.; ", *p)) {
1996 for (bp = buf; *p && !strchr("\t,;. ", *p); )
2001 for (i = 0; i < LOG_NFACILITIES; i++) {
2002 f->f_pmask[i] = pri;
2003 f->f_pcmp[i] = pri_cmp;
2006 i = decode(buf, facilitynames);
2009 (void)snprintf(ebuf, sizeof ebuf,
2010 "unknown facility name \"%s\"",
2015 f->f_pmask[i >> 3] = pri;
2016 f->f_pcmp[i >> 3] = pri_cmp;
2018 while (*p == ',' || *p == ' ')
2025 /* skip to action part */
2026 while (*p == '\t' || *p == ' ')
2041 * scan forward to see if there is a port defined.
2042 * so we can't use strlcpy..
2044 i = sizeof(f->f_un.f_forw.f_hname);
2045 tp = f->f_un.f_forw.f_hname;
2049 * an ipv6 address should start with a '[' in that case
2050 * we should scan for a ']'
2056 while (*p && (*p != endkey) && (i-- > 0)) {
2059 if (endkey == ']' && *p == endkey)
2063 /* See if we copied a domain and have a port */
2069 memset(&hints, 0, sizeof(hints));
2070 hints.ai_family = family;
2071 hints.ai_socktype = SOCK_DGRAM;
2072 error = getaddrinfo(f->f_un.f_forw.f_hname,
2073 p ? p : "syslog", &hints, &res);
2075 logerror(gai_strerror(error));
2078 f->f_un.f_forw.f_addr = res;
2083 if ((f->f_file = open(p, logflags, 0600)) < 0) {
2084 f->f_type = F_UNUSED;
2089 f->f_flags |= FFLAG_SYNC;
2090 if (isatty(f->f_file)) {
2091 if (strcmp(p, ctty) == 0)
2092 f->f_type = F_CONSOLE;
2095 (void)strlcpy(f->f_un.f_fname, p + sizeof(_PATH_DEV) - 1,
2096 sizeof(f->f_un.f_fname));
2098 (void)strlcpy(f->f_un.f_fname, p, sizeof(f->f_un.f_fname));
2104 f->f_un.f_pipe.f_pid = 0;
2105 (void)strlcpy(f->f_un.f_pipe.f_pname, p + 1,
2106 sizeof(f->f_un.f_pipe.f_pname));
2115 for (i = 0; i < MAXUNAMES && *p; i++) {
2116 for (q = p; *q && *q != ','; )
2118 (void)strncpy(f->f_un.f_uname[i], p, MAXLOGNAME - 1);
2119 if ((q - p) >= MAXLOGNAME)
2120 f->f_un.f_uname[i][MAXLOGNAME - 1] = '\0';
2122 f->f_un.f_uname[i][q - p] = '\0';
2123 while (*q == ',' || *q == ' ')
2127 f->f_type = F_USERS;
2134 * Decode a symbolic name to a numeric value
2137 decode(const char *name, const CODE *codetab)
2143 return (atoi(name));
2145 for (p = buf; *name && p < &buf[sizeof(buf) - 1]; p++, name++) {
2147 *p = tolower(*name);
2152 for (c = codetab; c->c_name; c++)
2153 if (!strcmp(buf, c->c_name))
2165 now = time((time_t *)NULL);
2166 MarkSeq += TIMERINTVL;
2167 if (MarkSeq >= MarkInterval) {
2168 logmsg(LOG_INFO, "-- MARK --",
2169 LocalHostName, ADDDATE|MARK);
2173 for (f = Files; f; f = f->f_next) {
2174 if (f->f_prevcount && now >= REPEATTIME(f)) {
2175 dprintf("flush %s: repeated %d times, %d sec.\n",
2176 TypeNames[f->f_type], f->f_prevcount,
2177 repeatinterval[f->f_repeatcount]);
2178 fprintlog(f, 0, (char *)NULL);
2183 /* Walk the dead queue, and see if we should signal somebody. */
2184 for (q = TAILQ_FIRST(&deadq_head); q != NULL; q = next) {
2185 next = TAILQ_NEXT(q, dq_entries);
2187 switch (q->dq_timeout) {
2189 /* Already signalled once, try harder now. */
2190 if (kill(q->dq_pid, SIGKILL) != 0)
2191 (void)deadq_remove(q->dq_pid);
2196 * Timed out on dead queue, send terminate
2197 * signal. Note that we leave the removal
2198 * from the dead queue to reapchild(), which
2199 * will also log the event (unless the process
2200 * didn't even really exist, in case we simply
2201 * drop it from the dead queue).
2203 if (kill(q->dq_pid, SIGTERM) != 0)
2204 (void)deadq_remove(q->dq_pid);
2212 (void)alarm(TIMERINTVL);
2216 * fork off and become a daemon, but wait for the child to come online
2217 * before returning to the parent, or we get disk thrashing at boot etc.
2218 * Set a timer so we don't hang forever if it wedges.
2221 waitdaemon(int nochdir, int noclose, int maxwait)
2225 pid_t pid, childpid;
2227 switch (childpid = fork()) {
2233 signal(SIGALRM, timedout);
2235 while ((pid = wait3(&status, 0, NULL)) != -1) {
2236 if (WIFEXITED(status))
2237 errx(1, "child pid %d exited with return code %d",
2238 pid, WEXITSTATUS(status));
2239 if (WIFSIGNALED(status))
2240 errx(1, "child pid %d exited on signal %d%s",
2241 pid, WTERMSIG(status),
2242 WCOREDUMP(status) ? " (core dumped)" :
2244 if (pid == childpid) /* it's gone... */
2256 if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
2257 (void)dup2(fd, STDIN_FILENO);
2258 (void)dup2(fd, STDOUT_FILENO);
2259 (void)dup2(fd, STDERR_FILENO);
2267 * We get a SIGALRM from the child when it's running and finished doing it's
2268 * fsync()'s or O_SYNC writes for all the boot messages.
2270 * We also get a signal from the kernel if the timer expires, so check to
2271 * see what happened.
2274 timedout(int sig __unused)
2278 signal(SIGALRM, SIG_DFL);
2280 errx(1, "timed out waiting for child");
2286 * Add `s' to the list of allowable peer addresses to accept messages
2289 * `s' is a string in the form:
2291 * [*]domainname[:{servicename|portnumber|*}]
2295 * netaddr/maskbits[:{servicename|portnumber|*}]
2297 * Returns -1 on error, 0 if the argument was valid.
2303 struct allowedpeer ap;
2306 struct addrinfo hints, *res;
2307 struct in_addr *addrp, *maskp;
2310 u_int32_t *addr6p, *mask6p;
2312 char ip[NI_MAXHOST];
2315 if (*s != '[' || (cp1 = strchr(s + 1, ']')) == NULL)
2318 if ((cp1 = strrchr(cp1, ':'))) {
2319 /* service/port provided */
2321 if (strlen(cp1) == 1 && *cp1 == '*')
2322 /* any port allowed */
2324 else if ((se = getservbyname(cp1, "udp"))) {
2325 ap.port = ntohs(se->s_port);
2327 ap.port = strtol(cp1, &cp2, 0);
2329 return (-1); /* port not numeric */
2332 if ((se = getservbyname("syslog", "udp")))
2333 ap.port = ntohs(se->s_port);
2335 /* sanity, should not happen */
2339 if ((cp1 = strchr(s, '/')) != NULL &&
2340 strspn(cp1 + 1, "0123456789") == strlen(cp1 + 1)) {
2342 if ((masklen = atoi(cp1 + 1)) < 0)
2347 cp2 = s + strlen(s) - 1;
2358 memset(&hints, 0, sizeof(hints));
2359 hints.ai_family = PF_UNSPEC;
2360 hints.ai_socktype = SOCK_DGRAM;
2361 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
2362 if (getaddrinfo(s, NULL, &hints, &res) == 0) {
2364 memcpy(&ap.a_addr, res->ai_addr, res->ai_addrlen);
2365 memset(&ap.a_mask, 0, sizeof(ap.a_mask));
2366 ap.a_mask.ss_family = res->ai_family;
2367 if (res->ai_family == AF_INET) {
2368 ap.a_mask.ss_len = sizeof(struct sockaddr_in);
2369 maskp = &((struct sockaddr_in *)&ap.a_mask)->sin_addr;
2370 addrp = &((struct sockaddr_in *)&ap.a_addr)->sin_addr;
2372 /* use default netmask */
2373 if (IN_CLASSA(ntohl(addrp->s_addr)))
2374 maskp->s_addr = htonl(IN_CLASSA_NET);
2375 else if (IN_CLASSB(ntohl(addrp->s_addr)))
2376 maskp->s_addr = htonl(IN_CLASSB_NET);
2378 maskp->s_addr = htonl(IN_CLASSC_NET);
2379 } else if (masklen <= 32) {
2380 /* convert masklen to netmask */
2384 maskp->s_addr = htonl(~((1 << (32 - masklen)) - 1));
2389 /* Lose any host bits in the network number. */
2390 addrp->s_addr &= maskp->s_addr;
2393 else if (res->ai_family == AF_INET6 && masklen <= 128) {
2394 ap.a_mask.ss_len = sizeof(struct sockaddr_in6);
2397 mask6p = (u_int32_t *)&((struct sockaddr_in6 *)&ap.a_mask)->sin6_addr;
2398 /* convert masklen to netmask */
2399 while (masklen > 0) {
2401 *mask6p = htonl(~(0xffffffff >> masklen));
2404 *mask6p++ = 0xffffffff;
2407 /* Lose any host bits in the network number. */
2408 mask6p = (u_int32_t *)&((struct sockaddr_in6 *)&ap.a_mask)->sin6_addr;
2409 addr6p = (u_int32_t *)&((struct sockaddr_in6 *)&ap.a_addr)->sin6_addr;
2410 for (i = 0; i < 4; i++)
2411 addr6p[i] &= mask6p[i];
2420 /* arg `s' is domain name */
2434 printf("allowaddr: rule %d: ", NumAllowed);
2436 printf("numeric, ");
2437 getnameinfo((struct sockaddr *)&ap.a_addr,
2438 ((struct sockaddr *)&ap.a_addr)->sa_len,
2439 ip, sizeof ip, NULL, 0, NI_NUMERICHOST);
2440 printf("addr = %s, ", ip);
2441 getnameinfo((struct sockaddr *)&ap.a_mask,
2442 ((struct sockaddr *)&ap.a_mask)->sa_len,
2443 ip, sizeof ip, NULL, 0, NI_NUMERICHOST);
2444 printf("mask = %s; ", ip);
2446 printf("domainname = %s; ", ap.a_name);
2448 printf("port = %d\n", ap.port);
2451 if ((AllowedPeers = realloc(AllowedPeers,
2452 ++NumAllowed * sizeof(struct allowedpeer)))
2454 logerror("realloc");
2457 memcpy(&AllowedPeers[NumAllowed - 1], &ap, sizeof(struct allowedpeer));
2462 * Validate that the remote peer has permission to log to us.
2465 validate(struct sockaddr *sa, const char *hname)
2469 char *cp, name[NI_MAXHOST], ip[NI_MAXHOST], port[NI_MAXSERV];
2470 struct allowedpeer *ap;
2471 struct sockaddr_in *sin4, *a4p = NULL, *m4p = NULL;
2474 struct sockaddr_in6 *sin6, *a6p = NULL, *m6p = NULL;
2476 struct addrinfo hints, *res;
2479 if (NumAllowed == 0)
2480 /* traditional behaviour, allow everything */
2483 (void)strlcpy(name, hname, sizeof(name));
2484 memset(&hints, 0, sizeof(hints));
2485 hints.ai_family = PF_UNSPEC;
2486 hints.ai_socktype = SOCK_DGRAM;
2487 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
2488 if (getaddrinfo(name, NULL, &hints, &res) == 0)
2490 else if (strchr(name, '.') == NULL) {
2491 strlcat(name, ".", sizeof name);
2492 strlcat(name, LocalDomain, sizeof name);
2494 if (getnameinfo(sa, sa->sa_len, ip, sizeof ip, port, sizeof port,
2495 NI_NUMERICHOST | NI_NUMERICSERV) != 0)
2496 return (0); /* for safety, should not occur */
2497 dprintf("validate: dgram from IP %s, port %s, name %s;\n",
2501 /* now, walk down the list */
2502 for (i = 0, ap = AllowedPeers; i < NumAllowed; i++, ap++) {
2503 if (ap->port != 0 && ap->port != sport) {
2504 dprintf("rejected in rule %d due to port mismatch.\n", i);
2508 if (ap->isnumeric) {
2509 if (ap->a_addr.ss_family != sa->sa_family) {
2510 dprintf("rejected in rule %d due to address family mismatch.\n", i);
2513 if (ap->a_addr.ss_family == AF_INET) {
2514 sin4 = (struct sockaddr_in *)sa;
2515 a4p = (struct sockaddr_in *)&ap->a_addr;
2516 m4p = (struct sockaddr_in *)&ap->a_mask;
2517 if ((sin4->sin_addr.s_addr & m4p->sin_addr.s_addr)
2518 != a4p->sin_addr.s_addr) {
2519 dprintf("rejected in rule %d due to IP mismatch.\n", i);
2524 else if (ap->a_addr.ss_family == AF_INET6) {
2525 sin6 = (struct sockaddr_in6 *)sa;
2526 a6p = (struct sockaddr_in6 *)&ap->a_addr;
2527 m6p = (struct sockaddr_in6 *)&ap->a_mask;
2528 if (a6p->sin6_scope_id != 0 &&
2529 sin6->sin6_scope_id != a6p->sin6_scope_id) {
2530 dprintf("rejected in rule %d due to scope mismatch.\n", i);
2534 for (j = 0; j < 16; j += 4) {
2535 if ((*(u_int32_t *)&sin6->sin6_addr.s6_addr[j] & *(u_int32_t *)&m6p->sin6_addr.s6_addr[j])
2536 != *(u_int32_t *)&a6p->sin6_addr.s6_addr[j]) {
2542 dprintf("rejected in rule %d due to IP mismatch.\n", i);
2553 /* allow wildmatch */
2556 if (l2 > l1 || memcmp(cp, &name[l1 - l2], l2) != 0) {
2557 dprintf("rejected in rule %d due to name mismatch.\n", i);
2563 if (l2 != l1 || memcmp(cp, name, l1) != 0) {
2564 dprintf("rejected in rule %d due to name mismatch.\n", i);
2569 dprintf("accepted in rule %d.\n", i);
2570 return (1); /* hooray! */
2576 * Fairly similar to popen(3), but returns an open descriptor, as
2577 * opposed to a FILE *.
2580 p_open(const char *prog, pid_t *rpid)
2582 int pfd[2], nulldesc;
2584 sigset_t omask, mask;
2585 char *argv[4]; /* sh -c cmd NULL */
2588 if (pipe(pfd) == -1)
2590 if ((nulldesc = open(_PATH_DEVNULL, O_RDWR)) == -1)
2591 /* we are royally screwed anyway */
2595 sigaddset(&mask, SIGALRM);
2596 sigaddset(&mask, SIGHUP);
2597 sigprocmask(SIG_BLOCK, &mask, &omask);
2598 switch ((pid = fork())) {
2600 sigprocmask(SIG_SETMASK, &omask, 0);
2605 argv[0] = strdup("sh");
2606 argv[1] = strdup("-c");
2607 argv[2] = strdup(prog);
2609 if (argv[0] == NULL || argv[1] == NULL || argv[2] == NULL) {
2615 (void)setsid(); /* Avoid catching SIGHUPs. */
2618 * Throw away pending signals, and reset signal
2619 * behaviour to standard values.
2621 signal(SIGALRM, SIG_IGN);
2622 signal(SIGHUP, SIG_IGN);
2623 sigprocmask(SIG_SETMASK, &omask, 0);
2624 signal(SIGPIPE, SIG_DFL);
2625 signal(SIGQUIT, SIG_DFL);
2626 signal(SIGALRM, SIG_DFL);
2627 signal(SIGHUP, SIG_DFL);
2629 dup2(pfd[0], STDIN_FILENO);
2630 dup2(nulldesc, STDOUT_FILENO);
2631 dup2(nulldesc, STDERR_FILENO);
2634 (void)execvp(_PATH_BSHELL, argv);
2638 sigprocmask(SIG_SETMASK, &omask, 0);
2642 * Avoid blocking on a hung pipe. With O_NONBLOCK, we are
2643 * supposed to get an EWOULDBLOCK on writev(2), which is
2644 * caught by the logic above anyway, which will in turn close
2645 * the pipe, and fork a new logging subprocess if necessary.
2646 * The stale subprocess will be killed some time later unless
2647 * it terminated itself due to closing its input pipe (so we
2648 * get rid of really dead puppies).
2650 if (fcntl(pfd[1], F_SETFL, O_NONBLOCK) == -1) {
2652 (void)snprintf(errmsg, sizeof errmsg,
2653 "Warning: cannot change pipe to PID %d to "
2654 "non-blocking behaviour.",
2663 deadq_enter(pid_t pid, const char *name)
2671 * Be paranoid, if we can't signal the process, don't enter it
2672 * into the dead queue (perhaps it's already dead). If possible,
2673 * we try to fetch and log the child's status.
2675 if (kill(pid, 0) != 0) {
2676 if (waitpid(pid, &status, WNOHANG) > 0)
2677 log_deadchild(pid, status, name);
2681 p = malloc(sizeof(struct deadq_entry));
2688 p->dq_timeout = DQ_TIMO_INIT;
2689 TAILQ_INSERT_TAIL(&deadq_head, p, dq_entries);
2693 deadq_remove(pid_t pid)
2697 TAILQ_FOREACH(q, &deadq_head, dq_entries) {
2698 if (q->dq_pid == pid) {
2699 TAILQ_REMOVE(&deadq_head, q, dq_entries);
2709 log_deadchild(pid_t pid, int status, const char *name)
2715 errno = 0; /* Keep strerror() stuff out of logerror messages. */
2716 if (WIFSIGNALED(status)) {
2717 reason = "due to signal";
2718 code = WTERMSIG(status);
2720 reason = "with status";
2721 code = WEXITSTATUS(status);
2725 (void)snprintf(buf, sizeof buf,
2726 "Logging subprocess %d (%s) exited %s %d.",
2727 pid, name, reason, code);
2732 socksetup(int af, char *bindhostname)
2734 struct addrinfo hints, *res, *r;
2735 const char *bindservice;
2737 int error, maxs, *s, *socks;
2740 * We have to handle this case for backwards compatibility:
2741 * If there are two (or more) colons but no '[' and ']',
2742 * assume this is an inet6 address without a service.
2744 bindservice = "syslog";
2745 if (bindhostname != NULL) {
2747 if (*bindhostname == '[' &&
2748 (cp = strchr(bindhostname + 1, ']')) != NULL) {
2751 if (cp[1] == ':' && cp[2] != '\0')
2752 bindservice = cp + 2;
2755 cp = strchr(bindhostname, ':');
2756 if (cp != NULL && strchr(cp + 1, ':') == NULL) {
2759 bindservice = cp + 1;
2760 if (cp == bindhostname)
2761 bindhostname = NULL;
2768 memset(&hints, 0, sizeof(hints));
2769 hints.ai_flags = AI_PASSIVE;
2770 hints.ai_family = af;
2771 hints.ai_socktype = SOCK_DGRAM;
2772 error = getaddrinfo(bindhostname, bindservice, &hints, &res);
2774 logerror(gai_strerror(error));
2779 /* Count max number of sockets we may open */
2780 for (maxs = 0, r = res; r; r = r->ai_next, maxs++);
2781 socks = malloc((maxs+1) * sizeof(int));
2782 if (socks == NULL) {
2783 logerror("couldn't allocate memory for sockets");
2787 *socks = 0; /* num of sockets counter at start of array */
2789 for (r = res; r; r = r->ai_next) {
2791 *s = socket(r->ai_family, r->ai_socktype, r->ai_protocol);
2797 if (r->ai_family == AF_INET6) {
2798 if (setsockopt(*s, IPPROTO_IPV6, IPV6_V6ONLY,
2799 (char *)&on, sizeof (on)) < 0) {
2800 logerror("setsockopt");
2806 if (setsockopt(*s, SOL_SOCKET, SO_REUSEADDR,
2807 (char *)&on, sizeof (on)) < 0) {
2808 logerror("setsockopt");
2813 * RFC 3164 recommends that client side message
2814 * should come from the privileged syslogd port.
2816 * If the system administrator choose not to obey
2817 * this, we can skip the bind() step so that the
2818 * system will choose a port for us.
2821 if (bind(*s, r->ai_addr, r->ai_addrlen) < 0) {
2828 increase_rcvbuf(*s);
2849 increase_rcvbuf(int fd)
2851 socklen_t len, slen;
2855 if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &len, &slen) == 0) {
2856 if (len < RCVBUF_MINSIZE) {
2857 len = RCVBUF_MINSIZE;
2858 setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &len, sizeof(len));