1575 lines
36 KiB
C
1575 lines
36 KiB
C
/* $NetBSD: syslogd.c,v 1.60 2003/08/07 11:25:44 agc Exp $ */
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/*
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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. 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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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) 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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#if 0
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static char sccsid[] = "@(#)syslogd.c 8.3 (Berkeley) 4/4/94";
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#else
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__RCSID("$NetBSD: syslogd.c,v 1.60 2003/08/07 11:25:44 agc Exp $");
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#endif
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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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*/
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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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#define TTYMSGTIME 1 /* timeout passed to ttymsg */
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/sysctl.h>
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#include <sys/types.h>
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#include <sys/un.h>
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#include <sys/wait.h>
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#include <netinet/in.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 <grp.h>
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#include <locale.h>
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#include <netdb.h>
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#include <poll.h>
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#include <pwd.h>
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#include <signal.h>
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#include <stdarg.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 <util.h>
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#include "utmpentry.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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#ifdef LIBWRAP
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#include <tcpd.h>
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int allow_severity = LOG_AUTH|LOG_INFO;
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int deny_severity = LOG_AUTH|LOG_WARNING;
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#endif
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char *ConfFile = _PATH_LOGCONF;
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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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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 addrinfo *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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int daemonized = 0; /* we are not daemonized yet */
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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 *finet = NULL; /* Internet datagram sockets */
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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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int SecureMode = 0; /* listen only on unix domain socks */
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int UseNameService = 1; /* make domain name queries */
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int NumForwards = 0; /* number of forwarding actions in conf file */
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char **LogPaths; /* array of pathnames to read messages from */
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void cfline(char *, struct filed *);
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char *cvthname(struct sockaddr_storage *);
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int decode(const char *, CODE *);
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void die(int);
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void domark(int);
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void fprintlog(struct filed *, int, char *);
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int getmsgbufsize(void);
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int* socksetup(int);
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void init(int);
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void logerror(const char *, ...);
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void logmsg(int, char *, char *, int);
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void printline(char *, char *);
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void printsys(char *);
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void reapchild(int);
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void usage(void);
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void wallmsg(struct filed *, struct iovec *);
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int main(int, char *[]);
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void logpath_add(char ***, int *, int *, char *);
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void logpath_fileadd(char ***, int *, int *, char *);
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int
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main(int argc, char *argv[])
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{
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int ch, *funix, i, j, fklog, len, linesize;
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int *nfinetix, nfklogix, nfunixbaseix, nfds;
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int funixsize = 0, funixmaxsize = 0;
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struct sockaddr_un sunx, fromunix;
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struct sockaddr_storage frominet;
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char *p, *line, **pp;
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struct pollfd *readfds;
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uid_t uid = 0;
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gid_t gid = 0;
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char *user = NULL;
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char *group = NULL;
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char *root = "/";
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char *endp;
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struct group *gr;
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struct passwd *pw;
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unsigned long l;
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(void)setlocale(LC_ALL, "");
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while ((ch = getopt(argc, argv, "dnsf:m:p:P:u:g:t:")) != -1)
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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 'g':
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group = optarg;
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if (*group == '\0')
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usage();
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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 'n': /* turn off DNS queries */
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UseNameService = 0;
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break;
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case 'p': /* path */
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logpath_add(&LogPaths, &funixsize,
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&funixmaxsize, optarg);
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break;
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case 'P': /* file of paths */
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logpath_fileadd(&LogPaths, &funixsize,
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&funixmaxsize, optarg);
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break;
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case 's': /* no network listen mode */
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SecureMode++;
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break;
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case 't':
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root = optarg;
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if (*root == '\0')
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usage();
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break;
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case 'u':
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user = optarg;
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if (*user == '\0')
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usage();
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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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setlinebuf(stdout);
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if (user != NULL) {
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if (isdigit((unsigned char)*user)) {
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errno = 0;
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endp = NULL;
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l = strtoul(user, &endp, 0);
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if (errno || *endp != '\0')
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goto getuser;
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uid = (uid_t)l;
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if (uid != l) {
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errno = 0;
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logerror("UID out of range");
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die(0);
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}
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} else {
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getuser:
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if ((pw = getpwnam(user)) != NULL) {
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uid = pw->pw_uid;
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} else {
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errno = 0;
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logerror("Cannot find user `%s'", user);
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die (0);
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}
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}
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}
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if (group != NULL) {
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if (isdigit((unsigned char)*group)) {
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errno = 0;
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endp = NULL;
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l = strtoul(group, &endp, 0);
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if (errno || *endp != '\0')
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goto getgroup;
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gid = (gid_t)l;
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if (gid != l) {
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errno = 0;
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logerror("GID out of range");
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die(0);
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}
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} else {
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getgroup:
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if ((gr = getgrnam(group)) != NULL) {
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gid = gr->gr_gid;
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} else {
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errno = 0;
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logerror("Cannot find group `%s'", group);
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die(0);
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}
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}
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}
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if (access (root, F_OK | R_OK)) {
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logerror("Cannot access `%s'", root);
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die (0);
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}
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consfile.f_type = F_CONSOLE;
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(void)strlcpy(consfile.f_un.f_fname, ctty,
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sizeof(consfile.f_un.f_fname));
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(void)gethostname(LocalHostName, sizeof(LocalHostName));
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LocalHostName[sizeof(LocalHostName) - 1] = '\0';
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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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linesize = getmsgbufsize();
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if (linesize < MAXLINE)
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linesize = MAXLINE;
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linesize++;
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line = malloc(linesize);
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if (line == NULL) {
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logerror("Couldn't allocate line buffer");
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die(0);
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}
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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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#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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if (funixsize == 0)
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logpath_add(&LogPaths, &funixsize,
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&funixmaxsize, _PATH_LOG);
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funix = (int *)malloc(sizeof(int) * funixsize);
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if (funix == NULL) {
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logerror("Couldn't allocate funix descriptors");
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die(0);
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}
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for (j = 0, pp = LogPaths; *pp; pp++, j++) {
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dprintf("Making unix dgram socket `%s'\n", *pp);
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unlink(*pp);
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memset(&sunx, 0, sizeof(sunx));
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sunx.sun_family = AF_LOCAL;
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(void)strncpy(sunx.sun_path, *pp, sizeof(sunx.sun_path));
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funix[j] = socket(AF_LOCAL, SOCK_DGRAM, 0);
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if (funix[j] < 0 || bind(funix[j],
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(struct sockaddr *)&sunx, SUN_LEN(&sunx)) < 0 ||
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chmod(*pp, 0666) < 0) {
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logerror("Cannot create `%s'", *pp);
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die(0);
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}
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dprintf("Listening on unix dgram socket `%s'\n", *pp);
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}
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init(0);
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if ((fklog = open(_PATH_KLOG, O_RDONLY, 0)) < 0) {
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dprintf("Can't open `%s' (%d)\n", _PATH_KLOG, errno);
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} else {
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dprintf("Listening on kernel log `%s'\n", _PATH_KLOG);
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}
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dprintf("Off & running....\n");
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(void)signal(SIGHUP, init);
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/* setup pollfd set. */
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readfds = (struct pollfd *)malloc(sizeof(struct pollfd) *
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(funixsize + (finet ? *finet : 0) + 1));
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if (readfds == NULL) {
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logerror("Couldn't allocate pollfds");
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die(0);
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}
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nfds = 0;
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if (fklog >= 0) {
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nfklogix = nfds++;
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readfds[nfklogix].fd = fklog;
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readfds[nfklogix].events = POLLIN | POLLPRI;
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}
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if (finet && !SecureMode) {
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nfinetix = malloc(*finet * sizeof(*nfinetix));
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for (j = 0; j < *finet; j++) {
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nfinetix[j] = nfds++;
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readfds[nfinetix[j]].fd = finet[j+1];
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readfds[nfinetix[j]].events = POLLIN | POLLPRI;
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}
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}
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nfunixbaseix = nfds;
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for (j = 0, pp = LogPaths; *pp; pp++) {
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readfds[nfds].fd = funix[j++];
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readfds[nfds++].events = POLLIN | POLLPRI;
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}
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/*
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* All files are open, we can drop privileges and chroot
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*/
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dprintf("Attempt to chroot to `%s'\n", root);
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if (chroot(root)) {
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logerror("Failed to chroot to `%s'", root);
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die(0);
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}
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dprintf("Attempt to set GID/EGID to `%d'\n", gid);
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if (setgid(gid) || setegid(gid)) {
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logerror("Failed to set gid to `%d'", gid);
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die(0);
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}
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dprintf("Attempt to set UID/EUID to `%d'\n", uid);
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if (setuid(uid) || seteuid(uid)) {
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logerror("Failed to set uid to `%d'", uid);
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die(0);
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}
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/*
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* We cannot detach from the terminal before we are sure we won't
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* have a fatal error, because error message would not go to the
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* terminal and would not be logged because syslogd dies.
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* All die() calls are behind us, we can call daemon()
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*/
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if (!Debug) {
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(void)daemon(0, 0);
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daemonized = 1;
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|
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/* tuck my process id away, if i'm not in debug mode */
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pidfile(NULL);
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}
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for (;;) {
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int rv;
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rv = poll(readfds, nfds, INFTIM);
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if (rv == 0)
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continue;
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if (rv < 0) {
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if (errno != EINTR)
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logerror("poll() failed");
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continue;
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}
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dprintf("Got a message (%d)\n", rv);
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if (fklog >= 0 &&
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(readfds[nfklogix].revents & (POLLIN | POLLPRI))) {
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dprintf("Kernel log active\n");
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i = read(fklog, line, linesize - 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 failed");
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fklog = -1;
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}
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}
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for (j = 0, pp = LogPaths; *pp; pp++, j++) {
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if ((readfds[nfunixbaseix + j].revents &
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(POLLIN | POLLPRI)) == 0)
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continue;
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|
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dprintf("Unix socket (%s) active\n", *pp);
|
|
len = sizeof(fromunix);
|
|
i = recvfrom(funix[j], 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 `%s'", *pp);
|
|
}
|
|
}
|
|
if (finet && !SecureMode) {
|
|
for (j = 0; j < *finet; j++) {
|
|
if (readfds[nfinetix[j]].revents &
|
|
(POLLIN | POLLPRI)) {
|
|
#ifdef LIBWRAP
|
|
struct request_info req;
|
|
#endif
|
|
int reject = 0;
|
|
|
|
dprintf("inet socket active\n");
|
|
|
|
#ifdef LIBWRAP
|
|
request_init(&req, RQ_DAEMON, "syslogd",
|
|
RQ_FILE, finet[j + 1], NULL);
|
|
fromhost(&req);
|
|
reject = !hosts_access(&req);
|
|
if (reject)
|
|
dprintf("access denied\n");
|
|
#endif
|
|
|
|
len = sizeof(frominet);
|
|
i = recvfrom(finet[j+1], line, MAXLINE,
|
|
0, (struct sockaddr *)&frominet,
|
|
&len);
|
|
if (i == 0 || (i < 0 && errno == EINTR))
|
|
continue;
|
|
else if (i < 0) {
|
|
logerror("recvfrom inet");
|
|
continue;
|
|
}
|
|
|
|
line[i] = '\0';
|
|
if (!reject)
|
|
printline(cvthname(&frominet),
|
|
line);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
usage(void)
|
|
{
|
|
|
|
(void)fprintf(stderr,
|
|
"usage: %s [-dns] [-f config_file] [-g group] [-m mark_interval]\n"
|
|
"\t[-P file_list] [-p log_socket [-p log_socket2 ...]]\n"
|
|
"\t[-t chroot_dir] [-u user]\n", getprogname());
|
|
exit(1);
|
|
}
|
|
|
|
/*
|
|
* given a pointer to an array of char *'s, a pointer to it's current
|
|
* size and current allocated max size, and a new char * to add, add
|
|
* it, update everything as necessary, possibly allocating a new array
|
|
*/
|
|
void
|
|
logpath_add(char ***lp, int *szp, int *maxszp, char *new)
|
|
{
|
|
|
|
dprintf("Adding `%s' to the %p logpath list\n", new, *lp);
|
|
if (*szp == *maxszp) {
|
|
if (*maxszp == 0) {
|
|
*maxszp = 4; /* start of with enough for now */
|
|
*lp = NULL;
|
|
} else
|
|
*maxszp *= 2;
|
|
*lp = realloc(*lp, sizeof(char *) * (*maxszp + 1));
|
|
if (*lp == NULL) {
|
|
logerror("Couldn't allocate line buffer");
|
|
die(0);
|
|
}
|
|
}
|
|
if (((*lp)[(*szp)++] = strdup(new)) == NULL) {
|
|
logerror("Couldn't allocate logpath");
|
|
die(0);
|
|
}
|
|
(*lp)[(*szp)] = NULL; /* always keep it NULL terminated */
|
|
}
|
|
|
|
/* do a file of log sockets */
|
|
void
|
|
logpath_fileadd(char ***lp, int *szp, int *maxszp, char *file)
|
|
{
|
|
FILE *fp;
|
|
char *line;
|
|
size_t len;
|
|
|
|
fp = fopen(file, "r");
|
|
if (fp == NULL) {
|
|
logerror("Could not open socket file list `%s'", file);
|
|
die(0);
|
|
}
|
|
|
|
while ((line = fgetln(fp, &len))) {
|
|
line[len - 1] = 0;
|
|
logpath_add(lp, szp, maxszp, line);
|
|
}
|
|
fclose(fp);
|
|
}
|
|
|
|
/*
|
|
* Take a raw input line, decode the message, and print the message
|
|
* on the appropriate log files.
|
|
*/
|
|
void
|
|
printline(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++) != '\0' &&
|
|
q < &line[sizeof(line) - 2]) {
|
|
c &= 0177;
|
|
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(char *msg)
|
|
{
|
|
int c, pri, flags;
|
|
char *lp, *p, *q, line[MAXLINE + 1];
|
|
|
|
(void)strlcpy(line, _PATH_UNIX, sizeof(line));
|
|
(void)strlcat(line, ": ", sizeof(line));
|
|
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(int pri, char *msg, char *from, int flags)
|
|
{
|
|
struct filed *f;
|
|
int fac, msglen, omask, prilev;
|
|
char *timestamp;
|
|
|
|
dprintf("logmsg: pri 0%o, flags 0x%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);
|
|
|
|
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 &&
|
|
!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, (long)(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;
|
|
f->f_prevpri = pri;
|
|
(void)strncpy(f->f_lasttime, timestamp, 15);
|
|
(void)strncpy(f->f_prevhost, from,
|
|
sizeof(f->f_prevhost));
|
|
if (msglen < MAXSVLINE) {
|
|
f->f_prevlen = msglen;
|
|
(void)strlcpy(f->f_prevline, msg,
|
|
sizeof(f->f_prevline));
|
|
fprintlog(f, flags, (char *)NULL);
|
|
} else {
|
|
f->f_prevline[0] = 0;
|
|
f->f_prevlen = 0;
|
|
fprintlog(f, flags, msg);
|
|
}
|
|
}
|
|
}
|
|
(void)sigsetmask(omask);
|
|
}
|
|
|
|
void
|
|
fprintlog(struct filed *f, int flags, char *msg)
|
|
{
|
|
struct iovec iov[6];
|
|
struct iovec *v;
|
|
struct addrinfo *r;
|
|
int j, l, lsent;
|
|
char line[MAXLINE + 1], repbuf[80], greetings[200];
|
|
|
|
v = iov;
|
|
if (f->f_type == F_WALL) {
|
|
v->iov_base = greetings;
|
|
v->iov_len = snprintf(greetings, sizeof 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 = snprintf(repbuf, sizeof 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);
|
|
/*
|
|
* check for local vs remote messages
|
|
* (from FreeBSD PR#bin/7055)
|
|
*/
|
|
if (strcmp(f->f_prevhost, LocalHostName)) {
|
|
l = snprintf(line, sizeof(line) - 1,
|
|
"<%d>%.15s [%s]: %s",
|
|
f->f_prevpri, (char *) iov[0].iov_base,
|
|
f->f_prevhost, (char *) iov[4].iov_base);
|
|
} else {
|
|
l = snprintf(line, sizeof(line) - 1, "<%d>%.15s %s",
|
|
f->f_prevpri, (char *) iov[0].iov_base,
|
|
(char *) iov[4].iov_base);
|
|
}
|
|
if (l > MAXLINE)
|
|
l = MAXLINE;
|
|
if (finet) {
|
|
for (r = f->f_un.f_forw.f_addr; r; r = r->ai_next) {
|
|
for (j = 0; j < *finet; j++) {
|
|
#if 0
|
|
/*
|
|
* should we check AF first, or just
|
|
* trial and error? FWD
|
|
*/
|
|
if (r->ai_family ==
|
|
address_family_of(finet[j+1]))
|
|
#endif
|
|
lsent = sendto(finet[j+1], line, l, 0,
|
|
r->ai_addr, r->ai_addrlen);
|
|
if (lsent == l)
|
|
break;
|
|
}
|
|
}
|
|
if (lsent != l) {
|
|
f->f_type = F_UNUSED;
|
|
logerror("sendto() failed");
|
|
}
|
|
}
|
|
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(struct filed *f, struct iovec *iov)
|
|
{
|
|
static int reenter; /* avoid calling ourselves */
|
|
int i;
|
|
char *p;
|
|
static struct utmpentry *ohead = NULL;
|
|
struct utmpentry *ep;
|
|
|
|
if (reenter++)
|
|
return;
|
|
|
|
(void)getutentries(NULL, &ep);
|
|
if (ep != ohead) {
|
|
freeutentries(ohead);
|
|
ohead = ep;
|
|
}
|
|
/* NOSTRICT */
|
|
for (; ep; ep = ep->next) {
|
|
if (f->f_type == F_WALL) {
|
|
if ((p = ttymsg(iov, 6, ep->line, TTYMSGTIME))
|
|
!= 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 (strcmp(f->f_un.f_uname[i], ep->name) == 0) {
|
|
if ((p = ttymsg(iov, 6, ep->line, TTYMSGTIME))
|
|
!= NULL) {
|
|
errno = 0; /* already in msg */
|
|
logerror(p);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
reenter = 0;
|
|
}
|
|
|
|
void
|
|
reapchild(int signo)
|
|
{
|
|
union wait status;
|
|
|
|
while (wait3((int *)&status, WNOHANG, (struct rusage *)NULL) > 0)
|
|
;
|
|
}
|
|
|
|
/*
|
|
* Return a printable representation of a host address.
|
|
*/
|
|
char *
|
|
cvthname(struct sockaddr_storage *f)
|
|
{
|
|
int error;
|
|
char *p;
|
|
const int niflag = NI_DGRAM;
|
|
static char host[NI_MAXHOST], ip[NI_MAXHOST];
|
|
|
|
error = getnameinfo((struct sockaddr*)f, ((struct sockaddr*)f)->sa_len,
|
|
ip, sizeof ip, NULL, 0, NI_NUMERICHOST|niflag);
|
|
|
|
dprintf("cvthname(%s)\n", ip);
|
|
|
|
if (error) {
|
|
dprintf("Malformed from address %s\n", gai_strerror(error));
|
|
return ("???");
|
|
}
|
|
|
|
if (!UseNameService)
|
|
return (ip);
|
|
|
|
error = getnameinfo((struct sockaddr*)f, ((struct sockaddr*)f)->sa_len,
|
|
host, sizeof host, NULL, 0, niflag);
|
|
if (error) {
|
|
dprintf("Host name for your address (%s) unknown\n", ip);
|
|
return (ip);
|
|
}
|
|
if ((p = strchr(host, '.')) && strcmp(p + 1, LocalDomain) == 0)
|
|
*p = '\0';
|
|
return (host);
|
|
}
|
|
|
|
void
|
|
domark(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(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
char tmpbuf[BUFSIZ];
|
|
char buf[BUFSIZ];
|
|
|
|
va_start(ap, fmt);
|
|
|
|
(void)vsnprintf(tmpbuf, sizeof(tmpbuf), fmt, ap);
|
|
|
|
va_end(ap);
|
|
|
|
if (errno)
|
|
(void)snprintf(buf, sizeof(buf), "syslogd: %s: %s",
|
|
tmpbuf, strerror(errno));
|
|
else
|
|
(void)snprintf(buf, sizeof(buf), "syslogd: %s", tmpbuf);
|
|
|
|
if (daemonized)
|
|
logmsg(LOG_SYSLOG|LOG_ERR, buf, LocalHostName, ADDDATE);
|
|
if (!daemonized && Debug)
|
|
dprintf("%s\n", buf);
|
|
if (!daemonized && !Debug)
|
|
printf("%s\n", buf);
|
|
|
|
return;
|
|
}
|
|
|
|
void
|
|
die(int signo)
|
|
{
|
|
struct filed *f;
|
|
char **p;
|
|
|
|
for (f = Files; f != NULL; f = f->f_next) {
|
|
/* flush any pending output */
|
|
if (f->f_prevcount)
|
|
fprintlog(f, 0, (char *)NULL);
|
|
}
|
|
errno = 0;
|
|
if (signo)
|
|
logerror("Exiting on signal %d", signo);
|
|
else
|
|
logerror("Fatal error, exiting");
|
|
for (p = LogPaths; p && *p; p++)
|
|
unlink(*p);
|
|
exit(0);
|
|
}
|
|
|
|
/*
|
|
* INIT -- Initialize syslogd from configuration table
|
|
*/
|
|
void
|
|
init(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:
|
|
(void)close(f->f_file);
|
|
break;
|
|
case F_FORW:
|
|
if (f->f_un.f_forw.f_addr)
|
|
freeaddrinfo(f->f_un.f_forw.f_addr);
|
|
break;
|
|
}
|
|
next = f->f_next;
|
|
free((char *)f);
|
|
}
|
|
Files = NULL;
|
|
nextp = &Files;
|
|
|
|
/*
|
|
* Close all open sockets
|
|
*/
|
|
|
|
if (finet) {
|
|
for (i = 0; i < *finet; i++) {
|
|
if (close(finet[i+1]) < 0) {
|
|
logerror("close() failed");
|
|
die(0);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Reset counter of forwarding actions
|
|
*/
|
|
|
|
NumForwards=0;
|
|
|
|
/* 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 < MAXUNAMES && *f->f_un.f_uname[i]; i++)
|
|
printf("%s, ", f->f_un.f_uname[i]);
|
|
break;
|
|
}
|
|
printf("\n");
|
|
}
|
|
}
|
|
|
|
finet = socksetup(PF_UNSPEC);
|
|
if (finet) {
|
|
if (SecureMode) {
|
|
for (i = 0; i < *finet; i++) {
|
|
if (shutdown(finet[i+1], SHUT_RD) < 0) {
|
|
logerror("shutdown() failed");
|
|
die(0);
|
|
}
|
|
}
|
|
} else
|
|
dprintf("Listening on inet and/or inet6 socket\n");
|
|
dprintf("Sending on inet and/or inet6 socket\n");
|
|
}
|
|
|
|
logmsg(LOG_SYSLOG|LOG_INFO, "syslogd: restart", LocalHostName, ADDDATE);
|
|
dprintf("syslogd: restarted\n");
|
|
}
|
|
|
|
/*
|
|
* Crack a configuration file line
|
|
*/
|
|
void
|
|
cfline(char *line, struct filed *f)
|
|
{
|
|
struct addrinfo hints, *res;
|
|
int error, i, pri;
|
|
char *bp, *p, *q;
|
|
char buf[MAXLINE];
|
|
int sp_err;
|
|
|
|
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;
|
|
|
|
/*
|
|
* There should not be any space before the log facility.
|
|
* Check this is okay, complain and fix if it is not.
|
|
*/
|
|
q = line;
|
|
if (isblank((unsigned char)*line)) {
|
|
errno = 0;
|
|
logerror(
|
|
"Warning: `%s' space or tab before the log facility",
|
|
line);
|
|
/* Fix: strip all spaces/tabs before the log facility */
|
|
while (*q++ && isblank((unsigned char)*q));
|
|
line = q;
|
|
}
|
|
|
|
/*
|
|
* q is now at the first char of the log facility
|
|
* There should be at least one tab after the log facility
|
|
* Check this is okay, and complain and fix if it is not.
|
|
*/
|
|
q = line + strlen(line);
|
|
while (!isblank((unsigned char)*q) && (q != line))
|
|
q--;
|
|
if ((q == line) && strlen(line)) {
|
|
/* No tabs or space in a non empty line: complain */
|
|
errno = 0;
|
|
logerror(
|
|
"Error: `%s' log facility or log target missing",
|
|
line);
|
|
}
|
|
|
|
/* q is at the end of the blank between the two fields */
|
|
sp_err = 0;
|
|
while (isblank((unsigned char)*q) && (q != line))
|
|
if (*q-- == ' ')
|
|
sp_err = 1;
|
|
|
|
if (sp_err) {
|
|
/*
|
|
* A space somewhere between the log facility
|
|
* and the log target: complain
|
|
*/
|
|
errno = 0;
|
|
logerror(
|
|
"Warning: `%s' space found where tab is expected",
|
|
line);
|
|
/* ... and fix the problem: replace all spaces by tabs */
|
|
while (*++q && isblank((unsigned char)*q))
|
|
if (*q == ' ')
|
|
*q='\t';
|
|
}
|
|
|
|
/* 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) {
|
|
errno = 0;
|
|
logerror("Unknown priority name `%s'", buf);
|
|
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) {
|
|
errno = 0;
|
|
logerror("Unknown facility name `%s'",
|
|
buf);
|
|
return;
|
|
}
|
|
f->f_pmask[i >> 3] = pri;
|
|
}
|
|
while (*p == ',' || *p == ' ')
|
|
p++;
|
|
}
|
|
|
|
p = q;
|
|
}
|
|
|
|
/* skip to action part */
|
|
sp_err = 0;
|
|
while ((*p == '\t') || (*p == ' '))
|
|
p++;
|
|
|
|
switch (*p)
|
|
{
|
|
case '@':
|
|
(void)strlcpy(f->f_un.f_forw.f_hname, ++p,
|
|
sizeof(f->f_un.f_forw.f_hname));
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_family = AF_UNSPEC;
|
|
hints.ai_socktype = SOCK_DGRAM;
|
|
hints.ai_protocol = 0;
|
|
error = getaddrinfo(f->f_un.f_forw.f_hname, "syslog", &hints,
|
|
&res);
|
|
if (error) {
|
|
logerror(gai_strerror(error));
|
|
break;
|
|
}
|
|
f->f_un.f_forw.f_addr = res;
|
|
f->f_type = F_FORW;
|
|
NumForwards++;
|
|
break;
|
|
|
|
case '/':
|
|
(void)strlcpy(f->f_un.f_fname, p, sizeof(f->f_un.f_fname));
|
|
if ((f->f_file = open(p, O_WRONLY|O_APPEND, 0)) < 0) {
|
|
f->f_type = 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(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);
|
|
}
|
|
|
|
/*
|
|
* Retrieve the size of the kernel message buffer, via sysctl.
|
|
*/
|
|
int
|
|
getmsgbufsize(void)
|
|
{
|
|
int msgbufsize, mib[2];
|
|
size_t size;
|
|
|
|
mib[0] = CTL_KERN;
|
|
mib[1] = KERN_MSGBUFSIZE;
|
|
size = sizeof msgbufsize;
|
|
if (sysctl(mib, 2, &msgbufsize, &size, NULL, 0) == -1) {
|
|
dprintf("Couldn't get kern.msgbufsize\n");
|
|
return (0);
|
|
}
|
|
return (msgbufsize);
|
|
}
|
|
|
|
int *
|
|
socksetup(int af)
|
|
{
|
|
struct addrinfo hints, *res, *r;
|
|
int error, maxs, *s, *socks;
|
|
const int on = 1;
|
|
|
|
if(SecureMode && !NumForwards)
|
|
return(NULL);
|
|
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_flags = AI_PASSIVE;
|
|
hints.ai_family = af;
|
|
hints.ai_socktype = SOCK_DGRAM;
|
|
error = getaddrinfo(NULL, "syslog", &hints, &res);
|
|
if (error) {
|
|
logerror(gai_strerror(error));
|
|
errno = 0;
|
|
die(0);
|
|
}
|
|
|
|
/* Count max number of sockets we may open */
|
|
for (maxs = 0, r = res; r; r = r->ai_next, maxs++)
|
|
continue;
|
|
socks = malloc((maxs+1) * sizeof(int));
|
|
if (!socks) {
|
|
logerror("Couldn't allocate memory for sockets");
|
|
die(0);
|
|
}
|
|
|
|
*socks = 0; /* num of sockets counter at start of array */
|
|
s = socks + 1;
|
|
for (r = res; r; r = r->ai_next) {
|
|
*s = socket(r->ai_family, r->ai_socktype, r->ai_protocol);
|
|
if (*s < 0) {
|
|
logerror("socket() failed");
|
|
continue;
|
|
}
|
|
if (r->ai_family == AF_INET6 && setsockopt(*s, IPPROTO_IPV6,
|
|
IPV6_V6ONLY, &on, sizeof(on)) < 0) {
|
|
logerror("setsockopt(IPV6_V6ONLY) failed");
|
|
close(*s);
|
|
continue;
|
|
}
|
|
if (!SecureMode && bind(*s, r->ai_addr, r->ai_addrlen) < 0) {
|
|
logerror("bind() failed");
|
|
close (*s);
|
|
continue;
|
|
}
|
|
|
|
*socks = *socks + 1;
|
|
s++;
|
|
}
|
|
|
|
if (*socks == 0) {
|
|
free (socks);
|
|
if(Debug)
|
|
return(NULL);
|
|
else
|
|
die(0);
|
|
}
|
|
if (res)
|
|
freeaddrinfo(res);
|
|
|
|
return(socks);
|
|
}
|