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- /*
- * Copyright (c) 1983, 1988, 1993, 1994
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- static char copyright[] =
- "@(#) Copyright (c) 1983, 1988, 1993, 1994\n\
- The Regents of the University of California. All rights reserved.\n";
- #endif /* not lint */
-
- #ifndef lint
- static char sccsid[] = "@(#)syslogd.c 8.3 (Berkeley) 4/4/94";
- #endif /* not lint */
-
- /*
- * syslogd -- log system messages
- *
- * This program implements a system log. It takes a series of lines.
- * Each line may have a priority, signified as "<n>" as
- * the first characters of the line. If this is
- * not present, a default priority is used.
- *
- * To kill syslogd, send a signal 15 (terminate). A signal 1 (hup) will
- * cause it to reread its configuration file.
- *
- * Defined Constants:
- *
- * MAXLINE -- the maximimum line length that can be handled.
- * DEFUPRI -- the default priority for user messages
- * DEFSPRI -- the default priority for kernel messages
- *
- * Author: Eric Allman
- * extensive changes by Ralph Campbell
- * more extensive changes by Eric Allman (again)
- */
-
- #ifdef HAVE_CONFIG_H
- #include <config.h>
- #endif
-
- #define MAXLINE 1024 /* maximum line length */
- #define MAXSVLINE 120 /* maximum saved line length */
- #define DEFUPRI (LOG_USER|LOG_NOTICE)
- #define DEFSPRI (LOG_KERN|LOG_CRIT)
- #define TIMERINTVL 30 /* interval for checking flush, mark */
-
- #include <sys/param.h>
- #include <sys/ioctl.h>
- #include <sys/stat.h>
- #include <sys/wait.h>
- #include <sys/socket.h>
- #ifdef HAVE_SYS_MSGBUF_H
- #include <sys/msgbuf.h>
- #endif
- #include <sys/uio.h>
- #include <sys/un.h>
- #include <sys/time.h>
- #include <sys/resource.h>
-
- #include <netinet/in.h>
- #include <netdb.h>
- #include <arpa/inet.h>
-
- #include <ctype.h>
- #include <errno.h>
- #include <fcntl.h>
- #include <setjmp.h>
- #include <signal.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <unistd.h>
- #include <utmp.h>
- #include <paths.h>
-
- #define SYSLOG_NAMES
- #include <sys/syslog.h>
-
- char *LogName = _PATH_LOG;
- char *ConfFile = _PATH_LOGCONF;
- char *PidFile = _PATH_LOGPID;
- char ctty[] = _PATH_CONSOLE;
-
- #define FDMASK(fd) (1 << (fd))
-
- #define dprintf if (Debug) printf
-
- /*
- * Flags to logmsg().
- */
-
- #define IGN_CONS 0x001 /* don't print on console */
- #define SYNC_FILE 0x002 /* do fsync on file after printing */
- #define ADDDATE 0x004 /* add a date to the message */
- #define MARK 0x008 /* this message is a mark */
-
- /*
- * This structure represents the files that will have log
- * copies printed.
- */
-
- struct filed {
- struct filed *f_next; /* next in linked list */
- short f_type; /* entry type, see below */
- short f_file; /* file descriptor */
- time_t f_time; /* time this was last written */
- u_char f_pmask[LOG_NFACILITIES+1]; /* priority mask */
- union {
- struct {
- int f_nusers;
- char **f_unames;
- } f_user;
- struct {
- char *f_hname;
- struct sockaddr_in f_addr;
- } f_forw; /* forwarding address */
- char *f_fname;
- } f_un;
- char f_prevline[MAXSVLINE]; /* last message logged */
- char f_lasttime[16]; /* time of last occurrence */
- char *f_prevhost; /* host from which recd. */
- int f_prevpri; /* pri of f_prevline */
- int f_prevlen; /* length of f_prevline */
- int f_prevcount; /* repetition cnt of prevline */
- int f_repeatcount; /* number of "repeated" msgs */
- };
-
- /*
- * Intervals at which we flush out "message repeated" messages,
- * in seconds after previous message is logged. After each flush,
- * we move to the next interval until we reach the largest.
- */
- int repeatinterval[] = { 30, 120, 600 }; /* # of secs before flush */
- #define MAXREPEAT ((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1)
- #define REPEATTIME(f) ((f)->f_time + repeatinterval[(f)->f_repeatcount])
- #define BACKOFF(f) { if (++(f)->f_repeatcount > MAXREPEAT) \
- (f)->f_repeatcount = MAXREPEAT; \
- }
-
- /* values for f_type */
- #define F_UNUSED 0 /* unused entry */
- #define F_FILE 1 /* regular file */
- #define F_TTY 2 /* terminal */
- #define F_CONSOLE 3 /* console terminal */
- #define F_FORW 4 /* remote machine */
- #define F_USERS 5 /* list of users */
- #define F_WALL 6 /* everyone logged on */
-
- char *TypeNames[7] = {
- "UNUSED", "FILE", "TTY", "CONSOLE",
- "FORW", "USERS", "WALL"
- };
-
- struct filed *Files;
- struct filed consfile;
-
- int Debug; /* debug flag */
- char *LocalHostName = 0; /* our hostname */
- char *LocalDomain; /* our local domain name */
- int InetInuse = 0; /* non-zero if INET sockets are being used */
- int finet; /* Internet datagram socket */
- int LogPort; /* port number for INET connections */
- int Initialized = 0; /* set when we have initialized ourselves */
- int MarkInterval = 20 * 60; /* interval between marks in seconds */
- int MarkSeq = 0; /* mark sequence number */
-
- void cfline __P((char *, struct filed *));
- char *cvthname __P((struct sockaddr_in *));
- int decode __P((const char *, CODE *));
- void die __P((int));
- void domark __P((int));
- void fprintlog __P((struct filed *, int, char *));
- void init __P((int));
- void logerror __P((char *));
- void logmsg __P((int, char *, char *, int));
- void printline __P((char *, char *));
- void printsys __P((char *));
- void reapchild __P((int));
- char *ttymsg __P((struct iovec *, int, char *, int));
- void usage __P((void));
- void wallmsg __P((struct filed *, struct iovec *));
- extern char *localhost __P ((void));
-
- int
- main(argc, argv)
- int argc;
- char *argv[];
- {
- int ch, funix, i, inetm, fklog, klogm, len;
- struct sockaddr_un sunx, fromunix;
- struct sockaddr_in sin, frominet;
- FILE *fp;
- char *p;
- #ifdef HAVE_SYS_MSGBUF_H
- char line[MSG_BSIZE + 1];
- #else
- char line[MAXLINE + 1];
- #endif
-
- while ((ch = getopt(argc, argv, "df:m:p:")) != EOF)
- switch(ch) {
- case 'd': /* debug */
- Debug++;
- break;
- case 'f': /* configuration file */
- ConfFile = optarg;
- break;
- case 'm': /* mark interval */
- MarkInterval = atoi(optarg) * 60;
- break;
- case 'p': /* path */
- LogName = optarg;
- break;
- case '?':
- default:
- usage();
- }
- if ((argc -= optind) != 0)
- usage();
-
- if (!Debug)
- (void)daemon(0, 0);
- else
- setlinebuf(stdout);
-
- LocalHostName = localhost ();
- if (! LocalHostName) {
- perror ("Can't get local host name");
- exit (2);
- }
-
- if ((p = strchr(LocalHostName, '.')) != NULL) {
- *p++ = '\0';
- LocalDomain = p;
- } else
- LocalDomain = "";
-
- consfile.f_type = F_CONSOLE;
- consfile.f_un.f_fname = strdup (ctty);
-
- (void)signal(SIGTERM, die);
- (void)signal(SIGINT, Debug ? die : SIG_IGN);
- (void)signal(SIGQUIT, Debug ? die : SIG_IGN);
- (void)signal(SIGCHLD, reapchild);
- (void)signal(SIGALRM, domark);
- (void)alarm(TIMERINTVL);
- (void)unlink(LogName);
-
- #ifndef SUN_LEN
- #define SUN_LEN(unp) (strlen((unp)->sun_path) + 3)
- #endif
- memset(&sunx, 0, sizeof(sunx));
- sunx.sun_family = AF_UNIX;
- (void)strncpy(sunx.sun_path, LogName, sizeof(sunx.sun_path));
- funix = socket(AF_UNIX, SOCK_DGRAM, 0);
- if (funix < 0 ||
- bind(funix, (struct sockaddr *)&sunx, SUN_LEN(&sunx)) < 0 ||
- chmod(LogName, 0666) < 0) {
- (void) sprintf(line, "cannot create %s", LogName);
- logerror(line);
- dprintf("cannot create %s (%d)\n", LogName, errno);
- die(0);
- }
- finet = socket(AF_INET, SOCK_DGRAM, 0);
- inetm = 0;
- if (finet >= 0) {
- struct servent *sp;
-
- sp = getservbyname("syslog", "udp");
- if (sp == NULL) {
- errno = 0;
- logerror("syslog/udp: unknown service");
- die(0);
- }
- memset(&sin, 0, sizeof(sin));
- sin.sin_family = AF_INET;
- sin.sin_port = LogPort = sp->s_port;
- if (bind(finet, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
- logerror("bind");
- if (!Debug)
- die(0);
- } else {
- inetm = FDMASK(finet);
- InetInuse = 1;
- }
- }
-
- #ifdef _PATH_KLOG
- if ((fklog = open(_PATH_KLOG, O_RDONLY, 0)) >= 0)
- klogm = FDMASK(fklog);
- else {
- dprintf("can't open %s (%d)\n", _PATH_KLOG, errno);
- klogm = 0;
- }
- #else
- klogm = 0;
- #endif
-
- /* tuck my process id away */
- fp = fopen(PidFile, "w");
- if (fp != NULL) {
- fprintf(fp, "%d\n", getpid());
- (void) fclose(fp);
- }
-
- dprintf("off & running....\n");
-
- init(0);
- (void)signal(SIGHUP, init);
-
- for (;;) {
- int nfds, readfds = FDMASK(funix) | inetm | klogm;
-
- dprintf("readfds = %#x\n", readfds);
- nfds = select(20, (fd_set *)&readfds, (fd_set *)NULL,
- (fd_set *)NULL, (struct timeval *)NULL);
- if (nfds == 0)
- continue;
- if (nfds < 0) {
- if (errno != EINTR)
- logerror("select");
- continue;
- }
- dprintf("got a message (%d, %#x)\n", nfds, readfds);
- if (readfds & klogm) {
- i = read(fklog, line, sizeof(line) - 1);
- if (i > 0) {
- line[i] = '\0';
- printsys(line);
- } else if (i < 0 && errno != EINTR) {
- logerror("klog");
- fklog = -1;
- klogm = 0;
- }
- }
- if (readfds & FDMASK(funix)) {
- len = sizeof(fromunix);
- i = recvfrom(funix, line, MAXLINE, 0,
- (struct sockaddr *)&fromunix, &len);
- if (i > 0) {
- line[i] = '\0';
- printline(LocalHostName, line);
- } else if (i < 0 && errno != EINTR)
- logerror("recvfrom unix");
- }
- if (readfds & inetm) {
- len = sizeof(frominet);
- i = recvfrom(finet, line, MAXLINE, 0,
- (struct sockaddr *)&frominet, &len);
- if (i > 0) {
- line[i] = '\0';
- printline(cvthname(&frominet), line);
- } else if (i < 0 && errno != EINTR)
- logerror("recvfrom inet");
- }
- }
- }
-
- void
- usage()
- {
-
- (void)fprintf(stderr,
- "usage: syslogd [-f conffile] [-m markinterval] [-p logpath]\n");
- exit(1);
- }
-
- /*
- * Take a raw input line, decode the message, and print the message
- * on the appropriate log files.
- */
- void
- printline(hname, msg)
- char *hname;
- char *msg;
- {
- int c, pri;
- char *p, *q, line[MAXLINE + 1];
-
- /* test for special codes */
- pri = DEFUPRI;
- p = msg;
- if (*p == '<') {
- pri = 0;
- while (isdigit(*++p))
- pri = 10 * pri + (*p - '0');
- if (*p == '>')
- ++p;
- }
- if (pri &~ (LOG_FACMASK|LOG_PRIMASK))
- pri = DEFUPRI;
-
- /* don't allow users to log kernel messages */
- if (LOG_FAC(pri) == LOG_KERN)
- pri = LOG_MAKEPRI(LOG_USER, LOG_PRI(pri));
-
- q = line;
-
- while ((c = *p++ & 0177) != '\0' &&
- q < &line[sizeof(line) - 1])
- if (iscntrl(c))
- if (c == '\n')
- *q++ = ' ';
- else if (c == '\t')
- *q++ = '\t';
- else {
- *q++ = '^';
- *q++ = c ^ 0100;
- }
- else
- *q++ = c;
- *q = '\0';
-
- logmsg(pri, line, hname, 0);
- }
-
- /*
- * Take a raw input line from /dev/klog, split and format similar to syslog().
- */
- void
- printsys(msg)
- char *msg;
- {
- int c, pri, flags;
- char *lp, *p, *q, line[MAXLINE + 1];
-
- (void)strcpy(line, "vmunix: ");
- lp = line + strlen(line);
- for (p = msg; *p != '\0'; ) {
- flags = SYNC_FILE | ADDDATE; /* fsync file after write */
- pri = DEFSPRI;
- if (*p == '<') {
- pri = 0;
- while (isdigit(*++p))
- pri = 10 * pri + (*p - '0');
- if (*p == '>')
- ++p;
- } else {
- /* kernel printf's come out on console */
- flags |= IGN_CONS;
- }
- if (pri &~ (LOG_FACMASK|LOG_PRIMASK))
- pri = DEFSPRI;
- q = lp;
- while (*p != '\0' && (c = *p++) != '\n' &&
- q < &line[MAXLINE])
- *q++ = c;
- *q = '\0';
- logmsg(pri, line, LocalHostName, flags);
- }
- }
-
- time_t now;
-
- /*
- * Log a message to the appropriate log files, users, etc. based on
- * the priority.
- */
- void
- logmsg(pri, msg, from, flags)
- int pri;
- char *msg, *from;
- int flags;
- {
- struct filed *f;
- int fac, msglen, omask, prilev;
- char *timestamp;
-
- dprintf("logmsg: pri %o, flags %x, from %s, msg %s\n",
- pri, flags, from, msg);
-
- omask = sigblock(sigmask(SIGHUP)|sigmask(SIGALRM));
-
- /*
- * Check to see if msg looks non-standard.
- */
- msglen = strlen(msg);
- if (msglen < 16 || msg[3] != ' ' || msg[6] != ' ' ||
- msg[9] != ':' || msg[12] != ':' || msg[15] != ' ')
- flags |= ADDDATE;
-
- (void)time(&now);
- if (flags & ADDDATE)
- timestamp = ctime(&now) + 4;
- else {
- timestamp = msg;
- msg += 16;
- msglen -= 16;
- }
-
- /* extract facility and priority level */
- if (flags & MARK)
- fac = LOG_NFACILITIES;
- else
- fac = LOG_FAC(pri);
- prilev = LOG_PRI(pri);
-
- /* log the message to the particular outputs */
- if (!Initialized) {
- f = &consfile;
- f->f_file = open(ctty, O_WRONLY, 0);
- f->f_prevhost = strdup (LocalHostName);
- if (f->f_file >= 0) {
- fprintlog(f, flags, msg);
- (void)close(f->f_file);
- }
- (void)sigsetmask(omask);
- return;
- }
- for (f = Files; f; f = f->f_next) {
- /* skip messages that are incorrect priority */
- if (f->f_pmask[fac] < prilev ||
- f->f_pmask[fac] == INTERNAL_NOPRI)
- continue;
-
- if (f->f_type == F_CONSOLE && (flags & IGN_CONS))
- continue;
-
- /* don't output marks to recently written files */
- if ((flags & MARK) && (now - f->f_time) < MarkInterval / 2)
- continue;
-
- /*
- * suppress duplicate lines to this file
- */
- if ((flags & MARK) == 0 && msglen == f->f_prevlen &&
- f->f_prevhost &&
- !strcmp(msg, f->f_prevline) &&
- !strcmp(from, f->f_prevhost)) {
- (void)strncpy(f->f_lasttime, timestamp, 15);
- f->f_prevcount++;
- dprintf("msg repeated %d times, %ld sec of %d\n",
- f->f_prevcount, now - f->f_time,
- repeatinterval[f->f_repeatcount]);
- /*
- * If domark would have logged this by now,
- * flush it now (so we don't hold isolated messages),
- * but back off so we'll flush less often
- * in the future.
- */
- if (now > REPEATTIME(f)) {
- fprintlog(f, flags, (char *)NULL);
- BACKOFF(f);
- }
- } else {
- /* new line, save it */
- if (f->f_prevcount)
- fprintlog(f, 0, (char *)NULL);
- f->f_repeatcount = 0;
- (void)strncpy(f->f_lasttime, timestamp, 15);
- if (f->f_prevhost)
- free (f->f_prevhost);
- f->f_prevhost = strdup (from);
- if (msglen < MAXSVLINE) {
- f->f_prevlen = msglen;
- f->f_prevpri = pri;
- (void)strcpy(f->f_prevline, msg);
- fprintlog(f, flags, (char *)NULL);
- } else {
- f->f_prevline[0] = 0;
- f->f_prevlen = 0;
- fprintlog(f, flags, msg);
- }
- }
- }
- (void)sigsetmask(omask);
- }
-
- void
- fprintlog(f, flags, msg)
- struct filed *f;
- int flags;
- char *msg;
- {
- struct iovec iov[6];
- struct iovec *v;
- int l;
- char line[MAXLINE + 1], repbuf[80], greetings[200];
-
- v = iov;
- if (f->f_type == F_WALL) {
- v->iov_base = greetings;
- v->iov_len = sprintf(greetings,
- "\r\n\7Message from syslogd@%s at %.24s ...\r\n",
- f->f_prevhost, ctime(&now));
- v++;
- v->iov_base = "";
- v->iov_len = 0;
- v++;
- } else {
- v->iov_base = f->f_lasttime;
- v->iov_len = 15;
- v++;
- v->iov_base = " ";
- v->iov_len = 1;
- v++;
- }
- v->iov_base = f->f_prevhost;
- v->iov_len = strlen(v->iov_base);
- v++;
- v->iov_base = " ";
- v->iov_len = 1;
- v++;
-
- if (msg) {
- v->iov_base = msg;
- v->iov_len = strlen(msg);
- } else if (f->f_prevcount > 1) {
- v->iov_base = repbuf;
- v->iov_len = sprintf(repbuf, "last message repeated %d times",
- f->f_prevcount);
- } else {
- v->iov_base = f->f_prevline;
- v->iov_len = f->f_prevlen;
- }
- v++;
-
- dprintf("Logging to %s", TypeNames[f->f_type]);
- f->f_time = now;
-
- switch (f->f_type) {
- case F_UNUSED:
- dprintf("\n");
- break;
-
- case F_FORW:
- dprintf(" %s\n", f->f_un.f_forw.f_hname);
- l = sprintf(line, "<%d>%.15s %s", f->f_prevpri,
- iov[0].iov_base, iov[4].iov_base);
- if (l > MAXLINE)
- l = MAXLINE;
- if (sendto(finet, line, l, 0,
- (struct sockaddr *)&f->f_un.f_forw.f_addr,
- sizeof(f->f_un.f_forw.f_addr)) != l) {
- int e = errno;
- (void)close(f->f_file);
- f->f_type = F_UNUSED;
- errno = e;
- logerror("sendto");
- }
- break;
-
- case F_CONSOLE:
- if (flags & IGN_CONS) {
- dprintf(" (ignored)\n");
- break;
- }
- /* FALLTHROUGH */
-
- case F_TTY:
- case F_FILE:
- dprintf(" %s\n", f->f_un.f_fname);
- if (f->f_type != F_FILE) {
- v->iov_base = "\r\n";
- v->iov_len = 2;
- } else {
- v->iov_base = "\n";
- v->iov_len = 1;
- }
- again:
- if (writev(f->f_file, iov, 6) < 0) {
- int e = errno;
- (void)close(f->f_file);
- /*
- * Check for errors on TTY's due to loss of tty
- */
- if ((e == EIO || e == EBADF) && f->f_type != F_FILE) {
- f->f_file = open(f->f_un.f_fname,
- O_WRONLY|O_APPEND, 0);
- if (f->f_file < 0) {
- f->f_type = F_UNUSED;
- logerror(f->f_un.f_fname);
- } else
- goto again;
- } else {
- f->f_type = F_UNUSED;
- errno = e;
- logerror(f->f_un.f_fname);
- }
- } else if (flags & SYNC_FILE)
- (void)fsync(f->f_file);
- break;
-
- case F_USERS:
- case F_WALL:
- dprintf("\n");
- v->iov_base = "\r\n";
- v->iov_len = 2;
- wallmsg(f, iov);
- break;
- }
- f->f_prevcount = 0;
- }
-
- /*
- * WALLMSG -- Write a message to the world at large
- *
- * Write the specified message to either the entire
- * world, or a list of approved users.
- */
- void
- wallmsg(f, iov)
- struct filed *f;
- struct iovec *iov;
- {
- static int reenter; /* avoid calling ourselves */
- FILE *uf;
- struct utmp ut;
- int i;
- char *p;
- char line[sizeof(ut.ut_line) + 1];
-
- if (reenter++)
- return;
- if ((uf = fopen(_PATH_UTMP, "r")) == NULL) {
- logerror(_PATH_UTMP);
- reenter = 0;
- return;
- }
- /* NOSTRICT */
- while (fread((char *)&ut, sizeof(ut), 1, uf) == 1) {
- if (ut.ut_name[0] == '\0')
- continue;
- strncpy(line, ut.ut_line, sizeof(ut.ut_line));
- line[sizeof(ut.ut_line)] = '\0';
- if (f->f_type == F_WALL) {
- if ((p = ttymsg(iov, 6, line, 60*5)) != NULL) {
- errno = 0; /* already in msg */
- logerror(p);
- }
- continue;
- }
- /* should we send the message to this user? */
- for (i = 0; i < f->f_un.f_user.f_nusers; i++)
- if (!strncmp(f->f_un.f_user.f_unames[i], ut.ut_name,
- sizeof (ut.ut_name))) {
- if ((p = ttymsg(iov, 6, line, 60*5)) != NULL) {
- errno = 0; /* already in msg */
- logerror(p);
- }
- break;
- }
- }
- (void)fclose(uf);
- reenter = 0;
- }
-
- void
- reapchild(signo)
- int signo;
- {
- union wait status;
-
- while (wait3((int *)&status, WNOHANG, (struct rusage *)NULL) > 0)
- ;
- }
-
- /*
- * Return a printable representation of a host address.
- */
- char *
- cvthname(f)
- struct sockaddr_in *f;
- {
- struct hostent *hp;
- char *p;
-
- dprintf("cvthname(%s)\n", inet_ntoa(f->sin_addr));
-
- if (f->sin_family != AF_INET) {
- dprintf("Malformed from address\n");
- return ("???");
- }
- hp = gethostbyaddr((char *)&f->sin_addr,
- sizeof(struct in_addr), f->sin_family);
- if (hp == 0) {
- dprintf("Host name for your address (%s) unknown\n",
- inet_ntoa(f->sin_addr));
- return (inet_ntoa(f->sin_addr));
- }
- if ((p = strchr(hp->h_name, '.')) && strcmp(p + 1, LocalDomain) == 0)
- *p = '\0';
- return (hp->h_name);
- }
-
- void
- domark(signo)
- int signo;
- {
- struct filed *f;
-
- now = time((time_t *)NULL);
- MarkSeq += TIMERINTVL;
- if (MarkSeq >= MarkInterval) {
- logmsg(LOG_INFO, "-- MARK --", LocalHostName, ADDDATE|MARK);
- MarkSeq = 0;
- }
-
- for (f = Files; f; f = f->f_next) {
- if (f->f_prevcount && now >= REPEATTIME(f)) {
- dprintf("flush %s: repeated %d times, %d sec.\n",
- TypeNames[f->f_type], f->f_prevcount,
- repeatinterval[f->f_repeatcount]);
- fprintlog(f, 0, (char *)NULL);
- BACKOFF(f);
- }
- }
- (void)alarm(TIMERINTVL);
- }
-
- /*
- * Print syslogd errors some place.
- */
- void
- logerror(type)
- char *type;
- {
- char buf[100];
-
- if (errno)
- (void)snprintf(buf,
- sizeof(buf), "syslogd: %s: %s", type, strerror(errno));
- else
- (void)snprintf(buf, sizeof(buf), "syslogd: %s", type);
- errno = 0;
- dprintf("%s\n", buf);
- logmsg(LOG_SYSLOG|LOG_ERR, buf, LocalHostName, ADDDATE);
- }
-
- void
- die(signo)
- int signo;
- {
- struct filed *f;
- char buf[100];
-
- for (f = Files; f != NULL; f = f->f_next) {
- /* flush any pending output */
- if (f->f_prevcount)
- fprintlog(f, 0, (char *)NULL);
- }
- if (signo) {
- dprintf("syslogd: exiting on signal %d\n", signo);
- (void)sprintf(buf, "exiting on signal %d", signo);
- errno = 0;
- logerror(buf);
- }
- (void)unlink(LogName);
- exit(0);
- }
-
- /*
- * INIT -- Initialize syslogd from configuration table
- */
- void
- init(signo)
- int signo;
- {
- int i;
- FILE *cf;
- struct filed *f, *next, **nextp;
- char *p;
- char cline[LINE_MAX];
-
- dprintf("init\n");
-
- /*
- * Close all open log files.
- */
- Initialized = 0;
- for (f = Files; f != NULL; f = next) {
- /* flush any pending output */
- if (f->f_prevcount)
- fprintlog(f, 0, (char *)NULL);
-
- switch (f->f_type) {
- case F_FILE:
- case F_TTY:
- case F_CONSOLE:
- case F_FORW:
- (void)close(f->f_file);
- break;
- }
- next = f->f_next;
- free((char *)f);
- }
- Files = NULL;
- nextp = &Files;
-
- /* open the configuration file */
- if ((cf = fopen(ConfFile, "r")) == NULL) {
- dprintf("cannot open %s\n", ConfFile);
- *nextp = (struct filed *)calloc(1, sizeof(*f));
- cfline("*.ERR\t/dev/console", *nextp);
- (*nextp)->f_next = (struct filed *)calloc(1, sizeof(*f));
- cfline("*.PANIC\t*", (*nextp)->f_next);
- Initialized = 1;
- return;
- }
-
- /*
- * Foreach line in the conf table, open that file.
- */
- f = NULL;
- while (fgets(cline, sizeof(cline), cf) != NULL) {
- /*
- * check for end-of-section, comments, strip off trailing
- * spaces and newline character.
- */
- for (p = cline; isspace(*p); ++p)
- continue;
- if (*p == 0 || *p == '#')
- continue;
- for (p = strchr(cline, '\0'); isspace(*--p);)
- continue;
- *++p = '\0';
- f = (struct filed *)calloc(1, sizeof(*f));
- *nextp = f;
- nextp = &f->f_next;
- cfline(cline, f);
- }
-
- /* close the configuration file */
- (void)fclose(cf);
-
- Initialized = 1;
-
- if (Debug) {
- for (f = Files; f; f = f->f_next) {
- for (i = 0; i <= LOG_NFACILITIES; i++)
- if (f->f_pmask[i] == INTERNAL_NOPRI)
- printf("X ");
- else
- printf("%d ", f->f_pmask[i]);
- printf("%s: ", TypeNames[f->f_type]);
- switch (f->f_type) {
- case F_FILE:
- case F_TTY:
- case F_CONSOLE:
- printf("%s", f->f_un.f_fname);
- break;
-
- case F_FORW:
- printf("%s", f->f_un.f_forw.f_hname);
- break;
-
- case F_USERS:
- for (i = 0; i < f->f_un.f_user.f_nusers; i++)
- printf("%s, ",
- f->f_un.f_user.f_unames[i]);
- break;
- }
- printf("\n");
- }
- }
-
- logmsg(LOG_SYSLOG|LOG_INFO, "syslogd: restart", LocalHostName, ADDDATE);
- dprintf("syslogd: restarted\n");
- }
-
- /*
- * Crack a configuration file line
- */
- void
- cfline(line, f)
- char *line;
- struct filed *f;
- {
- struct hostent *hp;
- int i, pri;
- char *bp, *p, *q;
- char buf[MAXLINE], ebuf[100];
-
- dprintf("cfline(%s)\n", line);
-
- errno = 0; /* keep strerror() stuff out of logerror messages */
-
- /* clear out file entry */
- memset(f, 0, sizeof(*f));
- for (i = 0; i <= LOG_NFACILITIES; i++)
- f->f_pmask[i] = INTERNAL_NOPRI;
-
- /* scan through the list of selectors */
- for (p = line; *p && *p != '\t';) {
-
- /* find the end of this facility name list */
- for (q = p; *q && *q != '\t' && *q++ != '.'; )
- continue;
-
- /* collect priority name */
- for (bp = buf; *q && !strchr("\t,;", *q); )
- *bp++ = *q++;
- *bp = '\0';
-
- /* skip cruft */
- while (strchr(", ;", *q))
- q++;
-
- /* decode priority name */
- if (*buf == '*')
- pri = LOG_PRIMASK + 1;
- else {
- pri = decode(buf, prioritynames);
- if (pri < 0) {
- (void)sprintf(ebuf,
- "unknown priority name \"%s\"", buf);
- logerror(ebuf);
- return;
- }
- }
-
- /* scan facilities */
- while (*p && !strchr("\t.;", *p)) {
- for (bp = buf; *p && !strchr("\t,;.", *p); )
- *bp++ = *p++;
- *bp = '\0';
- if (*buf == '*')
- for (i = 0; i < LOG_NFACILITIES; i++)
- f->f_pmask[i] = pri;
- else {
- i = decode(buf, facilitynames);
- if (i < 0) {
- (void)sprintf(ebuf,
- "unknown facility name \"%s\"",
- buf);
- logerror(ebuf);
- return;
- }
- f->f_pmask[i >> 3] = pri;
- }
- while (*p == ',' || *p == ' ')
- p++;
- }
-
- p = q;
- }
-
- /* skip to action part */
- while (*p == '\t')
- p++;
-
- switch (*p)
- {
- case '@':
- if (!InetInuse)
- break;
- f->f_un.f_forw.f_hname = strdup (++p);
- hp = gethostbyname(p);
- if (hp == NULL) {
- extern int h_errno;
-
- logerror(hstrerror(h_errno));
- break;
- }
- memset(&f->f_un.f_forw.f_addr, 0,
- sizeof(f->f_un.f_forw.f_addr));
- f->f_un.f_forw.f_addr.sin_family = AF_INET;
- f->f_un.f_forw.f_addr.sin_port = LogPort;
- memmove(&f->f_un.f_forw.f_addr.sin_addr, hp->h_addr, hp->h_length);
- f->f_type = F_FORW;
- break;
-
- case '/':
- f->f_un.f_fname = strdup (p);
- if ((f->f_file = open(p, O_WRONLY|O_APPEND, 0)) < 0) {
- f->f_file = F_UNUSED;
- logerror(p);
- break;
- }
- if (isatty(f->f_file))
- f->f_type = F_TTY;
- else
- f->f_type = F_FILE;
- if (strcmp(p, ctty) == 0)
- f->f_type = F_CONSOLE;
- break;
-
- case '*':
- f->f_type = F_WALL;
- break;
-
- default:
- f->f_un.f_user.f_nusers = 1;
- for (q = p; *q; q++)
- if (*q == ',')
- f->f_un.f_user.f_nusers++;
- f->f_un.f_user.f_unames =
- malloc (f->f_un.f_user.f_nusers * sizeof (char *));
- for (i = 0; *p; i++) {
- for (q = p; *q && *q != ','; )
- q++;
- f->f_un.f_user.f_unames[i] = malloc (q - p + 1);
- if (f->f_un.f_user.f_unames[i]) {
- strncpy (f->f_un.f_user.f_unames[i], p, q - p);
- f->f_un.f_user.f_unames[i][q - p] = '\0';
- }
- while (*q == ',' || *q == ' ')
- q++;
- p = q;
- }
- f->f_type = F_USERS;
- break;
- }
- }
-
- /*
- * Decode a symbolic name to a numeric value
- */
- int
- decode(name, codetab)
- const char *name;
- CODE *codetab;
- {
- CODE *c;
- char *p, buf[40];
-
- if (isdigit(*name))
- return (atoi(name));
-
- for (p = buf; *name && p < &buf[sizeof(buf) - 1]; p++, name++) {
- if (isupper(*name))
- *p = tolower(*name);
- else
- *p = *name;
- }
- *p = '\0';
- for (c = codetab; c->c_name; c++)
- if (!strcmp(buf, c->c_name))
- return (c->c_val);
-
- return (-1);
- }
-