1195 lines
27 KiB
C
1195 lines
27 KiB
C
/*
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* Copyright (c) 1983, 1988, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char copyright[] =
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"@(#) Copyright (c) 1983, 1988, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)syslogd.c 8.3 (Berkeley) 4/4/94";
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#endif /* not lint */
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/*
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* syslogd -- log system messages
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*
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* This program implements a system log. It takes a series of lines.
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* Each line may have a priority, signified as "<n>" as
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* the first characters of the line. If this is
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* not present, a default priority is used.
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*
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* To kill syslogd, send a signal 15 (terminate). A signal 1 (hup) will
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* cause it to reread its configuration file.
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*
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* Defined Constants:
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*
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* MAXLINE -- the maximimum line length that can be handled.
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* DEFUPRI -- the default priority for user messages
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* DEFSPRI -- the default priority for kernel messages
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*
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* Author: Eric Allman
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* extensive changes by Ralph Campbell
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* more extensive changes by Eric Allman (again)
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* Extension to log by program name as well as facility and priority
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* by Peter da Silva.
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*/
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#define MAXLINE 1024 /* maximum line length */
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#define MAXSVLINE 120 /* maximum saved line length */
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#define DEFUPRI (LOG_USER|LOG_NOTICE)
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#define DEFSPRI (LOG_KERN|LOG_CRIT)
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#define TIMERINTVL 30 /* interval for checking flush, mark */
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <sys/socket.h>
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#include <sys/msgbuf.h>
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#include <sys/uio.h>
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#include <sys/un.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <sys/syslimits.h>
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#include <paths.h>
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#include <netinet/in.h>
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#include <netdb.h>
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#include <arpa/inet.h>
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#include <ctype.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <setjmp.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <utmp.h>
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#include "pathnames.h"
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#define SYSLOG_NAMES
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#include <sys/syslog.h>
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char *LogName = _PATH_LOG;
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char *ConfFile = _PATH_LOGCONF;
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char *PidFile = _PATH_LOGPID;
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char ctty[] = _PATH_CONSOLE;
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#define FDMASK(fd) (1 << (fd))
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#define dprintf if (Debug) printf
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#define MAXUNAMES 20 /* maximum number of user names */
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/*
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* Flags to logmsg().
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*/
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#define IGN_CONS 0x001 /* don't print on console */
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#define SYNC_FILE 0x002 /* do fsync on file after printing */
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#define ADDDATE 0x004 /* add a date to the message */
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#define MARK 0x008 /* this message is a mark */
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/*
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* This structure represents the files that will have log
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* copies printed.
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*/
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struct filed {
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struct filed *f_next; /* next in linked list */
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short f_type; /* entry type, see below */
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short f_file; /* file descriptor */
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time_t f_time; /* time this was last written */
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u_char f_pmask[LOG_NFACILITIES+1]; /* priority mask */
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char *f_program; /* program this applies to */
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union {
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char f_uname[MAXUNAMES][UT_NAMESIZE+1];
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struct {
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char f_hname[MAXHOSTNAMELEN+1];
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struct sockaddr_in f_addr;
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} f_forw; /* forwarding address */
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char f_fname[MAXPATHLEN];
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} f_un;
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char f_prevline[MAXSVLINE]; /* last message logged */
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char f_lasttime[16]; /* time of last occurrence */
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char f_prevhost[MAXHOSTNAMELEN+1]; /* host from which recd. */
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int f_prevpri; /* pri of f_prevline */
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int f_prevlen; /* length of f_prevline */
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int f_prevcount; /* repetition cnt of prevline */
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int f_repeatcount; /* number of "repeated" msgs */
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};
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/*
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* Intervals at which we flush out "message repeated" messages,
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* in seconds after previous message is logged. After each flush,
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* we move to the next interval until we reach the largest.
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*/
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int repeatinterval[] = { 30, 120, 600 }; /* # of secs before flush */
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#define MAXREPEAT ((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1)
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#define REPEATTIME(f) ((f)->f_time + repeatinterval[(f)->f_repeatcount])
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#define BACKOFF(f) { if (++(f)->f_repeatcount > MAXREPEAT) \
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(f)->f_repeatcount = MAXREPEAT; \
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}
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/* values for f_type */
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#define F_UNUSED 0 /* unused entry */
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#define F_FILE 1 /* regular file */
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#define F_TTY 2 /* terminal */
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#define F_CONSOLE 3 /* console terminal */
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#define F_FORW 4 /* remote machine */
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#define F_USERS 5 /* list of users */
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#define F_WALL 6 /* everyone logged on */
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char *TypeNames[7] = {
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"UNUSED", "FILE", "TTY", "CONSOLE",
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"FORW", "USERS", "WALL"
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};
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struct filed *Files;
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struct filed consfile;
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int Debug; /* debug flag */
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char LocalHostName[MAXHOSTNAMELEN+1]; /* our hostname */
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char *LocalDomain; /* our local domain name */
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int InetInuse = 0; /* non-zero if INET sockets are being used */
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int finet; /* Internet datagram socket */
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int LogPort; /* port number for INET connections */
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int Initialized = 0; /* set when we have initialized ourselves */
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int MarkInterval = 20 * 60; /* interval between marks in seconds */
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int MarkSeq = 0; /* mark sequence number */
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void cfline __P((char *, struct filed *, char *));
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char *cvthname __P((struct sockaddr_in *));
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int decode __P((const char *, CODE *));
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void die __P((int));
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void domark __P((int));
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void fprintlog __P((struct filed *, int, char *));
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void init __P((int));
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void logerror __P((char *));
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void logmsg __P((int, char *, char *, int));
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void printline __P((char *, char *));
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void printsys __P((char *));
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void reapchild __P((int));
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char *ttymsg __P((struct iovec *, int, char *, int));
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void usage __P((void));
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void wallmsg __P((struct filed *, struct iovec *));
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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int ch, funix, i, inetm, fklog, klogm, len;
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struct sockaddr_un sunx, fromunix;
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struct sockaddr_in sin, frominet;
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FILE *fp;
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char *p, line[MSG_BSIZE + 1];
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while ((ch = getopt(argc, argv, "df:m:p:")) != EOF)
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switch(ch) {
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case 'd': /* debug */
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Debug++;
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break;
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case 'f': /* configuration file */
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ConfFile = optarg;
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break;
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case 'm': /* mark interval */
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MarkInterval = atoi(optarg) * 60;
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break;
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case 'p': /* path */
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LogName = optarg;
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break;
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case '?':
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default:
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usage();
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}
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if ((argc -= optind) != 0)
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usage();
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if (!Debug)
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(void)daemon(0, 0);
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else
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setlinebuf(stdout);
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consfile.f_type = F_CONSOLE;
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(void)strcpy(consfile.f_un.f_fname, ctty);
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(void)gethostname(LocalHostName, sizeof(LocalHostName));
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if ((p = strchr(LocalHostName, '.')) != NULL) {
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*p++ = '\0';
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LocalDomain = p;
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} else
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LocalDomain = "";
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(void)signal(SIGTERM, die);
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(void)signal(SIGINT, Debug ? die : SIG_IGN);
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(void)signal(SIGQUIT, Debug ? die : SIG_IGN);
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(void)signal(SIGCHLD, reapchild);
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(void)signal(SIGALRM, domark);
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(void)alarm(TIMERINTVL);
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(void)unlink(LogName);
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#ifndef SUN_LEN
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#define SUN_LEN(unp) (strlen((unp)->sun_path) + 2)
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#endif
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memset(&sunx, 0, sizeof(sunx));
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sunx.sun_family = AF_UNIX;
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(void)strncpy(sunx.sun_path, LogName, sizeof(sunx.sun_path));
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funix = socket(AF_UNIX, SOCK_DGRAM, 0);
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if (funix < 0 ||
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bind(funix, (struct sockaddr *)&sunx, SUN_LEN(&sunx)) < 0 ||
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chmod(LogName, 0666) < 0) {
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(void) sprintf(line, "cannot create %s", LogName);
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logerror(line);
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dprintf("cannot create %s (%d)\n", LogName, errno);
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die(0);
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}
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finet = socket(AF_INET, SOCK_DGRAM, 0);
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inetm = 0;
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if (finet >= 0) {
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struct servent *sp;
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sp = getservbyname("syslog", "udp");
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if (sp == NULL) {
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errno = 0;
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logerror("syslog/udp: unknown service");
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die(0);
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}
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memset(&sin, 0, sizeof(sin));
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sin.sin_family = AF_INET;
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sin.sin_port = LogPort = sp->s_port;
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if (bind(finet, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
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logerror("bind");
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if (!Debug)
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die(0);
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} else {
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inetm = FDMASK(finet);
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InetInuse = 1;
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}
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}
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if ((fklog = open(_PATH_KLOG, O_RDONLY, 0)) >= 0)
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klogm = FDMASK(fklog);
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else {
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dprintf("can't open %s (%d)\n", _PATH_KLOG, errno);
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klogm = 0;
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}
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/* tuck my process id away */
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fp = fopen(PidFile, "w");
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if (fp != NULL) {
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fprintf(fp, "%d\n", getpid());
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(void) fclose(fp);
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}
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dprintf("off & running....\n");
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init(0);
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(void)signal(SIGHUP, init);
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for (;;) {
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int nfds, readfds = FDMASK(funix) | inetm | klogm;
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dprintf("readfds = %#x\n", readfds);
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nfds = select(20, (fd_set *)&readfds, (fd_set *)NULL,
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(fd_set *)NULL, (struct timeval *)NULL);
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if (nfds == 0)
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continue;
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if (nfds < 0) {
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if (errno != EINTR)
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logerror("select");
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continue;
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}
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dprintf("got a message (%d, %#x)\n", nfds, readfds);
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if (readfds & klogm) {
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i = read(fklog, line, sizeof(line) - 1);
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if (i > 0) {
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line[i] = '\0';
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printsys(line);
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} else if (i < 0 && errno != EINTR) {
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logerror("klog");
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fklog = -1;
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klogm = 0;
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}
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}
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if (readfds & FDMASK(funix)) {
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len = sizeof(fromunix);
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i = recvfrom(funix, line, MAXLINE, 0,
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(struct sockaddr *)&fromunix, &len);
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if (i > 0) {
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line[i] = '\0';
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printline(LocalHostName, line);
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} else if (i < 0 && errno != EINTR)
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logerror("recvfrom unix");
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}
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if (readfds & inetm) {
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len = sizeof(frominet);
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i = recvfrom(finet, line, MAXLINE, 0,
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(struct sockaddr *)&frominet, &len);
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if (i > 0) {
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line[i] = '\0';
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printline(cvthname(&frominet), line);
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} else if (i < 0 && errno != EINTR)
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logerror("recvfrom inet");
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}
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}
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}
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void
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usage()
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{
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(void)fprintf(stderr,
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"usage: syslogd [-f conffile] [-m markinterval] [-p logpath]\n");
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exit(1);
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}
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/*
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* Take a raw input line, decode the message, and print the message
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* on the appropriate log files.
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*/
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void
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printline(hname, msg)
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char *hname;
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char *msg;
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{
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int c, pri;
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char *p, *q, line[MAXLINE + 1];
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/* test for special codes */
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pri = DEFUPRI;
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p = msg;
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if (*p == '<') {
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pri = 0;
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while (isdigit(*++p))
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pri = 10 * pri + (*p - '0');
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if (*p == '>')
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++p;
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}
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if (pri &~ (LOG_FACMASK|LOG_PRIMASK))
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pri = DEFUPRI;
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/* don't allow users to log kernel messages */
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if (LOG_FAC(pri) == LOG_KERN)
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pri = LOG_MAKEPRI(LOG_USER, LOG_PRI(pri));
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q = line;
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while ((c = *p++ & 0177) != '\0' &&
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q < &line[sizeof(line) - 1])
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if (iscntrl(c))
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if (c == '\n')
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*q++ = ' ';
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else if (c == '\t')
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*q++ = '\t';
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else {
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*q++ = '^';
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*q++ = c ^ 0100;
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}
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else
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*q++ = c;
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*q = '\0';
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logmsg(pri, line, hname, 0);
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}
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/*
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* Take a raw input line from /dev/klog, split and format similar to syslog().
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*/
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void
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printsys(msg)
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char *msg;
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{
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int c, pri, flags;
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char *lp, *p, *q, line[MAXLINE + 1];
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(void)strcpy(line, getbootfile());
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(void)strcat(line, ": ");
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lp = line + strlen(line);
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for (p = msg; *p != '\0'; ) {
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flags = SYNC_FILE | ADDDATE; /* fsync file after write */
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pri = DEFSPRI;
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if (*p == '<') {
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pri = 0;
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while (isdigit(*++p))
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pri = 10 * pri + (*p - '0');
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if (*p == '>')
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++p;
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} else {
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/* kernel printf's come out on console */
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flags |= IGN_CONS;
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}
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if (pri &~ (LOG_FACMASK|LOG_PRIMASK))
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pri = DEFSPRI;
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q = lp;
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while (*p != '\0' && (c = *p++) != '\n' &&
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q < &line[MAXLINE])
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*q++ = c;
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*q = '\0';
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logmsg(pri, line, LocalHostName, flags);
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}
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}
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time_t now;
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/*
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* Log a message to the appropriate log files, users, etc. based on
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* the priority.
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*/
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void
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logmsg(pri, msg, from, flags)
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int pri;
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char *msg, *from;
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int flags;
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{
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struct filed *f;
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int fac, msglen, omask, prilev;
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char *timestamp;
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char prog[NAME_MAX+1];
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int i;
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dprintf("logmsg: pri %o, flags %x, from %s, msg %s\n",
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pri, flags, from, msg);
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omask = sigblock(sigmask(SIGHUP)|sigmask(SIGALRM));
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/*
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* Check to see if msg looks non-standard.
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*/
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msglen = strlen(msg);
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if (msglen < 16 || msg[3] != ' ' || msg[6] != ' ' ||
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msg[9] != ':' || msg[12] != ':' || msg[15] != ' ')
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flags |= ADDDATE;
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(void)time(&now);
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if (flags & ADDDATE)
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timestamp = ctime(&now) + 4;
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else {
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timestamp = msg;
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msg += 16;
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msglen -= 16;
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}
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/* skip leading blanks */
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while(isspace(*msg)) {
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msg++;
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msglen--;
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}
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|
|
/* extract facility and priority level */
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if (flags & MARK)
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fac = LOG_NFACILITIES;
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|
else
|
|
fac = LOG_FAC(pri);
|
|
prilev = LOG_PRI(pri);
|
|
|
|
/* extract program name */
|
|
for(i = 0; i < NAME_MAX; i++) {
|
|
if(!isalnum(msg[i]))
|
|
break;
|
|
prog[i] = msg[i];
|
|
}
|
|
prog[i] = 0;
|
|
|
|
/* log the message to the particular outputs */
|
|
if (!Initialized) {
|
|
f = &consfile;
|
|
f->f_file = open(ctty, O_WRONLY, 0);
|
|
|
|
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;
|
|
/* skip messages with the incorrect program name */
|
|
if(f->f_program)
|
|
if(strcmp(prog, f->f_program) != 0)
|
|
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 &&
|
|
!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);
|
|
(void)strncpy(f->f_prevhost, from,
|
|
sizeof(f->f_prevhost));
|
|
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 < MAXUNAMES; i++) {
|
|
if (!f->f_un.f_uname[i][0])
|
|
break;
|
|
if (!strncmp(f->f_un.f_uname[i], ut.ut_name,
|
|
UT_NAMESIZE)) {
|
|
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];
|
|
char prog[NAME_MAX+1];
|
|
|
|
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;
|
|
if(f->f_program) free(f->f_program);
|
|
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;
|
|
strcpy(prog, "*");
|
|
while (fgets(cline, sizeof(cline), cf) != NULL) {
|
|
/*
|
|
* check for end-of-section, comments, strip off trailing
|
|
* spaces and newline character. #!prog is treated specially:
|
|
* following lines apply only to that program.
|
|
*/
|
|
for (p = cline; isspace(*p); ++p)
|
|
continue;
|
|
if (*p == 0)
|
|
continue;
|
|
if(*p == '#') {
|
|
p++;
|
|
if(*p!='!')
|
|
continue;
|
|
}
|
|
if(*p=='!') {
|
|
p++;
|
|
while(isspace(*p)) p++;
|
|
if(!*p) {
|
|
strcpy(prog, "*");
|
|
continue;
|
|
}
|
|
for(i = 0; i < NAME_MAX; i++) {
|
|
if(!isalnum(p[i]))
|
|
break;
|
|
prog[i] = p[i];
|
|
}
|
|
prog[i] = 0;
|
|
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, prog);
|
|
}
|
|
|
|
/* 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 < MAXUNAMES && *f->f_un.f_uname[i]; i++)
|
|
printf("%s, ", f->f_un.f_uname[i]);
|
|
break;
|
|
}
|
|
if(f->f_program) {
|
|
printf(" (%s)", f->f_program);
|
|
}
|
|
printf("\n");
|
|
}
|
|
}
|
|
|
|
logmsg(LOG_SYSLOG|LOG_INFO, "syslogd: restart", LocalHostName, ADDDATE);
|
|
dprintf("syslogd: restarted\n");
|
|
}
|
|
|
|
/*
|
|
* Crack a configuration file line
|
|
*/
|
|
void
|
|
cfline(line, f, prog)
|
|
char *line;
|
|
struct filed *f;
|
|
char *prog;
|
|
{
|
|
struct hostent *hp;
|
|
int i, pri;
|
|
char *bp, *p, *q;
|
|
char buf[MAXLINE], ebuf[100];
|
|
|
|
dprintf("cfline(\"%s\", f, \"%s\")\n", line, prog);
|
|
|
|
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;
|
|
|
|
/* save program name if any */
|
|
if(prog && *prog=='*') prog = NULL;
|
|
if(prog) {
|
|
f->f_program = calloc(1, strlen(prog)+1);
|
|
if(f->f_program) {
|
|
strcpy(f->f_program, prog);
|
|
}
|
|
}
|
|
|
|
/* 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;
|
|
(void)strcpy(f->f_un.f_forw.f_hname, ++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 '/':
|
|
(void)strcpy(f->f_un.f_fname, 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:
|
|
for (i = 0; i < MAXUNAMES && *p; i++) {
|
|
for (q = p; *q && *q != ','; )
|
|
q++;
|
|
(void)strncpy(f->f_un.f_uname[i], p, UT_NAMESIZE);
|
|
if ((q - p) > UT_NAMESIZE)
|
|
f->f_un.f_uname[i][UT_NAMESIZE] = '\0';
|
|
else
|
|
f->f_un.f_uname[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);
|
|
}
|