2294 lines
52 KiB
C
2294 lines
52 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 const 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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#if 0
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static char sccsid[] = "@(#)syslogd.c 8.3 (Berkeley) 4/4/94";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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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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* -u and -v by Harlan Stenn.
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* Priority comparison code by Harlan Stenn.
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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 /* timed out passed to ttymsg */
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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/queue.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 <err.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 <sysexits.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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#ifdef NI_WITHSCOPEID
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static const int withscopeid = NI_WITHSCOPEID;
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#else
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static const int withscopeid = 0;
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#endif
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const char *ConfFile = _PATH_LOGCONF;
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const char *PidFile = _PATH_LOGPID;
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const char ctty[] = _PATH_CONSOLE;
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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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#define MAXFUNIX 20
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int nfunix = 1;
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char *funixn[MAXFUNIX] = { _PATH_LOG };
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int funix[MAXFUNIX];
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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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#define ISKERNEL 0x010 /* kernel generated message */
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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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char *f_host; /* host from which to recd. */
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u_char f_pmask[LOG_NFACILITIES+1]; /* priority mask */
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u_char f_pcmp[LOG_NFACILITIES+1]; /* compare priority */
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#define PRI_LT 0x1
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#define PRI_EQ 0x2
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#define PRI_GT 0x4
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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];
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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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struct {
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char f_pname[MAXPATHLEN];
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pid_t f_pid;
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} f_pipe;
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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]; /* 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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* Queue of about-to-be dead processes we should watch out for.
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*/
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TAILQ_HEAD(stailhead, deadq_entry) deadq_head;
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struct stailhead *deadq_headp;
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struct deadq_entry {
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pid_t dq_pid;
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int dq_timeout;
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TAILQ_ENTRY(deadq_entry) dq_entries;
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};
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/*
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* The timeout to apply to processes waiting on the dead queue. Unit
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* of measure is `mark intervals', i.e. 20 minutes by default.
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* Processes on the dead queue will be terminated after that time.
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*/
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#define DQ_TIMO_INIT 2
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typedef struct deadq_entry *dq_t;
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/*
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* Struct to hold records of network addresses that are allowed to log
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* to us.
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*/
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struct allowedpeer {
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int isnumeric;
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u_short port;
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union {
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struct {
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struct sockaddr_storage addr;
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struct sockaddr_storage mask;
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} numeric;
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char *name;
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} u;
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#define a_addr u.numeric.addr
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#define a_mask u.numeric.mask
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#define a_name u.name
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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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#define F_PIPE 7 /* pipe to program */
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char *TypeNames[8] = {
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"UNUSED", "FILE", "TTY", "CONSOLE",
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"FORW", "USERS", "WALL", "PIPE"
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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 resolve = 1; /* resolve hostname */
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char LocalHostName[MAXHOSTNAMELEN]; /* our hostname */
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char *LocalDomain; /* our local domain name */
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int *finet = NULL; /* Internet datagram socket */
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int fklog = -1; /* /dev/klog */
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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; /* when true, receive only unix domain socks */
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#ifdef INET6
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int family = PF_UNSPEC; /* protocol family (IPv4, IPv6 or both) */
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#else
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int family = PF_INET; /* protocol family (IPv4 only) */
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#endif
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int send_to_all = 0; /* send message to all IPv4/IPv6 addresses */
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char bootfile[MAXLINE+1]; /* booted kernel file */
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struct allowedpeer *AllowedPeers;
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int NumAllowed = 0; /* # of AllowedPeer entries */
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int UniquePriority = 0; /* Only log specified priority? */
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int LogFacPri = 0; /* Put facility and priority in log message: */
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/* 0=no, 1=numeric, 2=names */
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int KeepKernFac = 0; /* Keep remotely logged kernel facility */
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int allowaddr __P((char *));
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void cfline __P((char *, struct filed *, char *, char *));
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char *cvthname __P((struct sockaddr *));
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void deadq_enter __P((pid_t, const char *));
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int deadq_remove __P((pid_t));
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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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int* socksetup __P((int));
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void init __P((int));
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void logerror __P((const char *));
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void logmsg __P((int, char *, char *, int));
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void log_deadchild __P((pid_t, int, const char *));
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void printline __P((char *, char *));
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void printsys __P((char *));
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int p_open __P((char *, pid_t *));
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void readklog __P((void));
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void reapchild __P((int));
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char *ttymsg __P((struct iovec *, int, char *, int));
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static void usage __P((void));
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int validate __P((struct sockaddr *, const char *));
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static void unmapped __P((struct sockaddr *));
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void wallmsg __P((struct filed *, struct iovec *));
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int waitdaemon __P((int, int, int));
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void timedout __P((int));
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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, i, l;
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struct sockaddr_un sunx, fromunix;
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struct sockaddr_storage frominet;
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FILE *fp;
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char *p, *hname, line[MAXLINE + 1];
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struct timeval tv, *tvp;
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struct sigaction sact;
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sigset_t mask;
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pid_t ppid = 1;
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socklen_t len;
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while ((ch = getopt(argc, argv, "46Aa:df:kl:m:np:suv")) != -1)
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switch (ch) {
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case '4':
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family = PF_INET;
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break;
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#ifdef INET6
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case '6':
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family = PF_INET6;
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break;
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#endif
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case 'A':
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send_to_all++;
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break;
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case 'a': /* allow specific network addresses only */
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if (allowaddr(optarg) == -1)
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usage();
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break;
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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 'k': /* keep remote kern fac */
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KeepKernFac = 1;
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break;
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case 'l':
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if (nfunix < MAXFUNIX)
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funixn[nfunix++] = optarg;
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else
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warnx("out of descriptors, ignoring %s",
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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 'n':
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resolve = 0;
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break;
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case 'p': /* path */
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funixn[0] = optarg;
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break;
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case 's': /* no network mode */
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SecureMode++;
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break;
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case 'u': /* only log specified priority */
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UniquePriority++;
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break;
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case 'v': /* log facility and priority */
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LogFacPri++;
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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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ppid = waitdaemon(0, 0, 30);
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if (ppid < 0)
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err(1, "could not become daemon");
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} else
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setlinebuf(stdout);
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if (NumAllowed)
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endservent();
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consfile.f_type = F_CONSOLE;
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(void)strcpy(consfile.f_un.f_fname, ctty + sizeof _PATH_DEV - 1);
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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)strcpy(bootfile, getbootfile());
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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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/*
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* We don't want the SIGCHLD and SIGHUP handlers to interfere
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* with each other; they are likely candidates for being called
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* simultaneously (SIGHUP closes pipe descriptor, process dies,
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* SIGCHLD happens).
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*/
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sigemptyset(&mask);
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sigaddset(&mask, SIGHUP);
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sact.sa_handler = reapchild;
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sact.sa_mask = mask;
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sact.sa_flags = SA_RESTART;
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(void)sigaction(SIGCHLD, &sact, NULL);
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(void)signal(SIGALRM, domark);
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(void)signal(SIGPIPE, SIG_IGN); /* We'll catch EPIPE instead. */
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(void)alarm(TIMERINTVL);
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TAILQ_INIT(&deadq_head);
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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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for (i = 0; i < nfunix; i++) {
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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, funixn[i], sizeof(sunx.sun_path));
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funix[i] = socket(AF_UNIX, SOCK_DGRAM, 0);
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if (funix[i] < 0 ||
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bind(funix[i], (struct sockaddr *)&sunx,
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SUN_LEN(&sunx)) < 0 ||
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chmod(funixn[i], 0666) < 0) {
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(void) snprintf(line, sizeof line,
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"cannot create %s", funixn[i]);
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logerror(line);
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dprintf("cannot create %s (%d)\n", funixn[i], errno);
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if (i == 0)
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die(0);
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}
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}
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if (SecureMode <= 1)
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finet = socksetup(family);
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if (finet) {
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if (SecureMode) {
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for (i = 0; i < *finet; i++) {
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if (shutdown(finet[i+1], SHUT_RD) < 0) {
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logerror("shutdown");
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if (!Debug)
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die(0);
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}
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}
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} else
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dprintf("listening on inet and/or inet6 socket\n");
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dprintf("sending on inet and/or inet6 socket\n");
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}
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if ((fklog = open(_PATH_KLOG, O_RDONLY, 0)) >= 0)
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if (fcntl(fklog, F_SETFL, O_NONBLOCK) < 0)
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fklog = -1;
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if (fklog < 0)
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dprintf("can't open %s (%d)\n", _PATH_KLOG, errno);
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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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/* prevent SIGHUP and SIGCHLD handlers from running in parallel */
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sigemptyset(&mask);
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sigaddset(&mask, SIGCHLD);
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sact.sa_handler = init;
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sact.sa_mask = mask;
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sact.sa_flags = SA_RESTART;
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(void)sigaction(SIGHUP, &sact, NULL);
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tvp = &tv;
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tv.tv_sec = tv.tv_usec = 0;
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for (;;) {
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fd_set readfds;
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int nfds = 0;
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FD_ZERO(&readfds);
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if (fklog != -1) {
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FD_SET(fklog, &readfds);
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if (fklog > nfds)
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nfds = fklog;
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}
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if (finet && !SecureMode) {
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for (i = 0; i < *finet; i++) {
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FD_SET(finet[i+1], &readfds);
|
|
if (finet[i+1] > nfds)
|
|
nfds = finet[i+1];
|
|
}
|
|
}
|
|
for (i = 0; i < nfunix; i++) {
|
|
if (funix[i] != -1) {
|
|
FD_SET(funix[i], &readfds);
|
|
if (funix[i] > nfds)
|
|
nfds = funix[i];
|
|
}
|
|
}
|
|
|
|
/*dprintf("readfds = %#x\n", readfds);*/
|
|
nfds = select(nfds+1, &readfds, (fd_set *)NULL,
|
|
(fd_set *)NULL, tvp);
|
|
if (nfds == 0) {
|
|
if (tvp) {
|
|
tvp = NULL;
|
|
if (ppid != 1)
|
|
kill(ppid, SIGALRM);
|
|
}
|
|
continue;
|
|
}
|
|
if (nfds < 0) {
|
|
if (errno != EINTR)
|
|
logerror("select");
|
|
continue;
|
|
}
|
|
/*dprintf("got a message (%d, %#x)\n", nfds, readfds);*/
|
|
if (fklog != -1 && FD_ISSET(fklog, &readfds))
|
|
readklog();
|
|
if (finet && !SecureMode) {
|
|
for (i = 0; i < *finet; i++) {
|
|
if (FD_ISSET(finet[i+1], &readfds)) {
|
|
len = sizeof(frominet);
|
|
l = recvfrom(finet[i+1], line, MAXLINE,
|
|
0, (struct sockaddr *)&frominet,
|
|
&len);
|
|
if (l > 0) {
|
|
line[l] = '\0';
|
|
hname = cvthname((struct sockaddr *)&frominet);
|
|
unmapped((struct sockaddr *)&frominet);
|
|
if (validate((struct sockaddr *)&frominet, hname))
|
|
printline(hname, line);
|
|
} else if (l < 0 && errno != EINTR)
|
|
logerror("recvfrom inet");
|
|
}
|
|
}
|
|
}
|
|
for (i = 0; i < nfunix; i++) {
|
|
if (funix[i] != -1 && FD_ISSET(funix[i], &readfds)) {
|
|
len = sizeof(fromunix);
|
|
l = recvfrom(funix[i], line, MAXLINE, 0,
|
|
(struct sockaddr *)&fromunix, &len);
|
|
if (l > 0) {
|
|
line[l] = '\0';
|
|
printline(LocalHostName, line);
|
|
} else if (l < 0 && errno != EINTR)
|
|
logerror("recvfrom unix");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
unmapped(sa)
|
|
struct sockaddr *sa;
|
|
{
|
|
struct sockaddr_in6 *sin6;
|
|
struct sockaddr_in sin;
|
|
|
|
if (sa->sa_family != AF_INET6)
|
|
return;
|
|
if (sa->sa_len != sizeof(struct sockaddr_in6) ||
|
|
sizeof(sin) > sa->sa_len)
|
|
return;
|
|
sin6 = (struct sockaddr_in6 *)sa;
|
|
if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
|
|
return;
|
|
|
|
memset(&sin, 0, sizeof(sin));
|
|
sin.sin_family = AF_INET;
|
|
sin.sin_len = sizeof(struct sockaddr_in);
|
|
memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12],
|
|
sizeof(sin.sin_addr));
|
|
sin.sin_port = sin6->sin6_port;
|
|
|
|
memcpy(sa, &sin, sin.sin_len);
|
|
}
|
|
|
|
static void
|
|
usage()
|
|
{
|
|
|
|
fprintf(stderr, "%s\n%s\n%s\n",
|
|
"usage: syslogd [-46Adnsuv] [-a allowed_peer] [-f config_file]",
|
|
" [-m mark_interval] [-p log_socket]",
|
|
" [-l log_socket]");
|
|
exit(1);
|
|
}
|
|
|
|
/*
|
|
* Take a raw input line, decode the message, and print the message
|
|
* on the appropriate log files.
|
|
*/
|
|
void
|
|
printline(hname, msg)
|
|
char *hname;
|
|
char *msg;
|
|
{
|
|
int c, pri;
|
|
char *p, *q, line[MAXLINE + 1];
|
|
|
|
/* test for special codes */
|
|
pri = DEFUPRI;
|
|
p = msg;
|
|
if (*p == '<') {
|
|
pri = 0;
|
|
while (isdigit(*++p))
|
|
pri = 10 * pri + (*p - '0');
|
|
if (*p == '>')
|
|
++p;
|
|
}
|
|
if (pri &~ (LOG_FACMASK|LOG_PRIMASK))
|
|
pri = DEFUPRI;
|
|
|
|
/* don't allow users to log kernel messages */
|
|
if (LOG_FAC(pri) == LOG_KERN && !KeepKernFac)
|
|
pri = LOG_MAKEPRI(LOG_USER, LOG_PRI(pri));
|
|
|
|
q = line;
|
|
|
|
while ((c = (unsigned char)*p++) != '\0' &&
|
|
q < &line[sizeof(line) - 4]) {
|
|
if ((c & 0x80) && c < 0xA0) {
|
|
c &= 0x7F;
|
|
*q++ = 'M';
|
|
*q++ = '-';
|
|
}
|
|
if (isascii(c) && 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);
|
|
}
|
|
|
|
/*
|
|
* Read /dev/klog while data are available, split into lines.
|
|
*/
|
|
void
|
|
readklog()
|
|
{
|
|
char *p, *q, line[MAXLINE + 1];
|
|
int len, i;
|
|
|
|
len = 0;
|
|
for (;;) {
|
|
i = read(fklog, line + len, MAXLINE - 1 - len);
|
|
if (i > 0)
|
|
line[i + len] = '\0';
|
|
else if (i < 0 && errno != EINTR && errno != EAGAIN) {
|
|
logerror("klog");
|
|
fklog = -1;
|
|
break;
|
|
} else
|
|
break;
|
|
|
|
for (p = line; (q = strchr(p, '\n')) != NULL; p = q + 1) {
|
|
*q = '\0';
|
|
printsys(p);
|
|
}
|
|
len = strlen(p);
|
|
if (len >= MAXLINE - 1) {
|
|
printsys(p);
|
|
len = 0;
|
|
}
|
|
if (len > 0)
|
|
memmove(line, p, len + 1);
|
|
}
|
|
if (len > 0)
|
|
printsys(line);
|
|
}
|
|
|
|
/*
|
|
* Take a raw input line from /dev/klog, format similar to syslog().
|
|
*/
|
|
void
|
|
printsys(p)
|
|
char *p;
|
|
{
|
|
int pri, flags;
|
|
|
|
flags = ISKERNEL | SYNC_FILE | ADDDATE; /* fsync after write */
|
|
pri = DEFSPRI;
|
|
if (*p == '<') {
|
|
pri = 0;
|
|
while (isdigit(*++p))
|
|
pri = 10 * pri + (*p - '0');
|
|
if (*p == '>')
|
|
++p;
|
|
if ((pri & LOG_FACMASK) == LOG_CONSOLE)
|
|
flags |= IGN_CONS;
|
|
} else {
|
|
/* kernel printf's come out on console */
|
|
flags |= IGN_CONS;
|
|
}
|
|
if (pri &~ (LOG_FACMASK|LOG_PRIMASK))
|
|
pri = DEFSPRI;
|
|
logmsg(pri, p, LocalHostName, flags);
|
|
}
|
|
|
|
time_t now;
|
|
|
|
/*
|
|
* Log a message to the appropriate log files, users, etc. based on
|
|
* the priority.
|
|
*/
|
|
void
|
|
logmsg(pri, msg, from, flags)
|
|
int pri;
|
|
char *msg, *from;
|
|
int flags;
|
|
{
|
|
struct filed *f;
|
|
int i, fac, msglen, omask, prilev;
|
|
char *timestamp;
|
|
char prog[NAME_MAX+1];
|
|
char buf[MAXLINE+1];
|
|
|
|
dprintf("logmsg: pri %o, flags %x, from %s, msg %s\n",
|
|
pri, flags, from, msg);
|
|
|
|
omask = sigblock(sigmask(SIGHUP)|sigmask(SIGALRM));
|
|
|
|
/*
|
|
* Check to see if msg looks non-standard.
|
|
*/
|
|
msglen = strlen(msg);
|
|
if (msglen < 16 || msg[3] != ' ' || msg[6] != ' ' ||
|
|
msg[9] != ':' || msg[12] != ':' || msg[15] != ' ')
|
|
flags |= ADDDATE;
|
|
|
|
(void)time(&now);
|
|
if (flags & ADDDATE)
|
|
timestamp = ctime(&now) + 4;
|
|
else {
|
|
timestamp = msg;
|
|
msg += 16;
|
|
msglen -= 16;
|
|
}
|
|
|
|
/* skip leading blanks */
|
|
while (isspace(*msg)) {
|
|
msg++;
|
|
msglen--;
|
|
}
|
|
|
|
/* extract facility and priority level */
|
|
if (flags & MARK)
|
|
fac = LOG_NFACILITIES;
|
|
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;
|
|
|
|
/* add kernel prefix for kernel messages */
|
|
if (flags & ISKERNEL) {
|
|
snprintf(buf, sizeof(buf), "%s: %s", bootfile, msg);
|
|
msg = buf;
|
|
msglen = strlen(buf);
|
|
}
|
|
|
|
/* 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_pcmp[fac] & PRI_EQ) && (f->f_pmask[fac] == prilev))
|
|
||((f->f_pcmp[fac] & PRI_LT) && (f->f_pmask[fac] < prilev))
|
|
||((f->f_pcmp[fac] & PRI_GT) && (f->f_pmask[fac] > prilev))
|
|
)
|
|
|| f->f_pmask[fac] == INTERNAL_NOPRI)
|
|
continue;
|
|
/* skip messages with the incorrect hostname */
|
|
if (f->f_host)
|
|
switch (f->f_host[0]) {
|
|
case '+':
|
|
if (strcmp(from, f->f_host + 1) != 0)
|
|
continue;
|
|
break;
|
|
case '-':
|
|
if (strcmp(from, f->f_host + 1) == 0)
|
|
continue;
|
|
break;
|
|
}
|
|
|
|
/* 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) &&
|
|
!strcasecmp(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)-1);
|
|
f->f_prevhost[sizeof(f->f_prevhost)-1] = '\0';
|
|
if (msglen < MAXSVLINE) {
|
|
f->f_prevlen = msglen;
|
|
(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[7];
|
|
struct iovec *v;
|
|
struct addrinfo *r;
|
|
int i, l, lsent = 0;
|
|
char line[MAXLINE + 1], repbuf[80], greetings[200];
|
|
char *msgret;
|
|
|
|
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++;
|
|
}
|
|
|
|
if (LogFacPri) {
|
|
static char fp_buf[30]; /* Hollow laugh */
|
|
int fac = f->f_prevpri & LOG_FACMASK;
|
|
int pri = LOG_PRI(f->f_prevpri);
|
|
char *f_s = 0;
|
|
char f_n[5]; /* Hollow laugh */
|
|
char *p_s = 0;
|
|
char p_n[5]; /* Hollow laugh */
|
|
|
|
if (LogFacPri > 1) {
|
|
CODE *c;
|
|
|
|
for (c = facilitynames; c->c_name; c++) {
|
|
if (c->c_val == fac) {
|
|
f_s = c->c_name;
|
|
break;
|
|
}
|
|
}
|
|
for (c = prioritynames; c->c_name; c++) {
|
|
if (c->c_val == pri) {
|
|
p_s = c->c_name;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (!f_s) {
|
|
snprintf(f_n, sizeof f_n, "%d", LOG_FAC(fac));
|
|
f_s = f_n;
|
|
}
|
|
if (!p_s) {
|
|
snprintf(p_n, sizeof p_n, "%d", pri);
|
|
p_s = p_n;
|
|
}
|
|
snprintf(fp_buf, sizeof fp_buf, "<%s.%s> ", f_s, p_s);
|
|
v->iov_base = fp_buf;
|
|
v->iov_len = strlen(fp_buf);
|
|
} else {
|
|
v->iov_base="";
|
|
v->iov_len = 0;
|
|
}
|
|
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);
|
|
/* check for local vs remote messages */
|
|
if (strcasecmp(f->f_prevhost, LocalHostName))
|
|
l = snprintf(line, sizeof line - 1,
|
|
"<%d>%.15s Forwarded from %s: %s",
|
|
f->f_prevpri, iov[0].iov_base, f->f_prevhost,
|
|
iov[5].iov_base);
|
|
else
|
|
l = snprintf(line, sizeof line - 1, "<%d>%.15s %s",
|
|
f->f_prevpri, iov[0].iov_base, iov[5].iov_base);
|
|
if (l > MAXLINE)
|
|
l = MAXLINE;
|
|
|
|
if (finet) {
|
|
for (r = f->f_un.f_forw.f_addr; r; r = r->ai_next) {
|
|
for (i = 0; i < *finet; i++) {
|
|
#if 0
|
|
/*
|
|
* should we check AF first, or just
|
|
* trial and error? FWD
|
|
*/
|
|
if (r->ai_family ==
|
|
address_family_of(finet[i+1]))
|
|
#endif
|
|
lsent = sendto(finet[i+1], line, l, 0,
|
|
r->ai_addr, r->ai_addrlen);
|
|
if (lsent == l)
|
|
break;
|
|
}
|
|
if (lsent == l && !send_to_all)
|
|
break;
|
|
}
|
|
if (lsent != l) {
|
|
int e = errno;
|
|
(void)close(f->f_file);
|
|
errno = e;
|
|
f->f_type = F_UNUSED;
|
|
logerror("sendto");
|
|
}
|
|
}
|
|
break;
|
|
|
|
case F_FILE:
|
|
dprintf(" %s\n", f->f_un.f_fname);
|
|
v->iov_base = "\n";
|
|
v->iov_len = 1;
|
|
if (writev(f->f_file, iov, 7) < 0) {
|
|
int e = errno;
|
|
(void)close(f->f_file);
|
|
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_PIPE:
|
|
dprintf(" %s\n", f->f_un.f_pipe.f_pname);
|
|
v->iov_base = "\n";
|
|
v->iov_len = 1;
|
|
if (f->f_un.f_pipe.f_pid == 0) {
|
|
if ((f->f_file = p_open(f->f_un.f_pipe.f_pname,
|
|
&f->f_un.f_pipe.f_pid)) < 0) {
|
|
f->f_type = F_UNUSED;
|
|
logerror(f->f_un.f_pipe.f_pname);
|
|
break;
|
|
}
|
|
}
|
|
if (writev(f->f_file, iov, 7) < 0) {
|
|
int e = errno;
|
|
(void)close(f->f_file);
|
|
if (f->f_un.f_pipe.f_pid > 0)
|
|
deadq_enter(f->f_un.f_pipe.f_pid,
|
|
f->f_un.f_pipe.f_pname);
|
|
f->f_un.f_pipe.f_pid = 0;
|
|
errno = e;
|
|
logerror(f->f_un.f_pipe.f_pname);
|
|
}
|
|
break;
|
|
|
|
case F_CONSOLE:
|
|
if (flags & IGN_CONS) {
|
|
dprintf(" (ignored)\n");
|
|
break;
|
|
}
|
|
/* FALLTHROUGH */
|
|
|
|
case F_TTY:
|
|
dprintf(" %s%s\n", _PATH_DEV, f->f_un.f_fname);
|
|
v->iov_base = "\r\n";
|
|
v->iov_len = 2;
|
|
|
|
errno = 0; /* ttymsg() only sometimes returns an errno */
|
|
if ((msgret = ttymsg(iov, 7, f->f_un.f_fname, 10))) {
|
|
f->f_type = F_UNUSED;
|
|
logerror(msgret);
|
|
}
|
|
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, 7, 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 (!strncmp(f->f_un.f_uname[i], ut.ut_name,
|
|
UT_NAMESIZE)) {
|
|
if ((p = ttymsg(iov, 7, line, TTYMSGTIME))
|
|
!= NULL) {
|
|
errno = 0; /* already in msg */
|
|
logerror(p);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
(void)fclose(uf);
|
|
reenter = 0;
|
|
}
|
|
|
|
void
|
|
reapchild(signo)
|
|
int signo;
|
|
{
|
|
int status;
|
|
pid_t pid;
|
|
struct filed *f;
|
|
|
|
while ((pid = wait3(&status, WNOHANG, (struct rusage *)NULL)) > 0) {
|
|
if (!Initialized)
|
|
/* Don't tell while we are initting. */
|
|
continue;
|
|
|
|
/* First, look if it's a process from the dead queue. */
|
|
if (deadq_remove(pid))
|
|
goto oncemore;
|
|
|
|
/* Now, look in list of active processes. */
|
|
for (f = Files; f; f = f->f_next)
|
|
if (f->f_type == F_PIPE &&
|
|
f->f_un.f_pipe.f_pid == pid) {
|
|
(void)close(f->f_file);
|
|
f->f_un.f_pipe.f_pid = 0;
|
|
log_deadchild(pid, status,
|
|
f->f_un.f_pipe.f_pname);
|
|
break;
|
|
}
|
|
oncemore:
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Return a printable representation of a host address.
|
|
*/
|
|
char *
|
|
cvthname(f)
|
|
struct sockaddr *f;
|
|
{
|
|
int error;
|
|
sigset_t omask, nmask;
|
|
char *p;
|
|
static char hname[NI_MAXHOST], ip[NI_MAXHOST];
|
|
|
|
error = getnameinfo((struct sockaddr *)f,
|
|
((struct sockaddr *)f)->sa_len,
|
|
ip, sizeof ip, NULL, 0,
|
|
NI_NUMERICHOST | withscopeid);
|
|
dprintf("cvthname(%s)\n", ip);
|
|
|
|
if (error) {
|
|
dprintf("Malformed from address %s\n", gai_strerror(error));
|
|
return ("???");
|
|
}
|
|
if (!resolve)
|
|
return (ip);
|
|
|
|
sigemptyset(&nmask);
|
|
sigaddset(&nmask, SIGHUP);
|
|
sigprocmask(SIG_BLOCK, &nmask, &omask);
|
|
error = getnameinfo((struct sockaddr *)f,
|
|
((struct sockaddr *)f)->sa_len,
|
|
hname, sizeof hname, NULL, 0,
|
|
NI_NAMEREQD | withscopeid);
|
|
sigprocmask(SIG_SETMASK, &omask, NULL);
|
|
if (error) {
|
|
dprintf("Host name for your address (%s) unknown\n", ip);
|
|
return (ip);
|
|
}
|
|
if ((p = strchr(hname, '.')) && strcasecmp(p + 1, LocalDomain) == 0)
|
|
*p = '\0';
|
|
return (hname);
|
|
}
|
|
|
|
void
|
|
domark(signo)
|
|
int signo;
|
|
{
|
|
struct filed *f;
|
|
dq_t q;
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
/* Walk the dead queue, and see if we should signal somebody. */
|
|
for (q = TAILQ_FIRST(&deadq_head); q != NULL; q = TAILQ_NEXT(q, dq_entries))
|
|
switch (q->dq_timeout) {
|
|
case 0:
|
|
/* Already signalled once, try harder now. */
|
|
if (kill(q->dq_pid, SIGKILL) != 0)
|
|
(void)deadq_remove(q->dq_pid);
|
|
break;
|
|
|
|
case 1:
|
|
/*
|
|
* Timed out on dead queue, send terminate
|
|
* signal. Note that we leave the removal
|
|
* from the dead queue to reapchild(), which
|
|
* will also log the event (unless the process
|
|
* didn't even really exist, in case we simply
|
|
* drop it from the dead queue).
|
|
*/
|
|
if (kill(q->dq_pid, SIGTERM) != 0)
|
|
(void)deadq_remove(q->dq_pid);
|
|
/* FALLTHROUGH */
|
|
|
|
default:
|
|
q->dq_timeout--;
|
|
}
|
|
|
|
(void)alarm(TIMERINTVL);
|
|
}
|
|
|
|
/*
|
|
* Print syslogd errors some place.
|
|
*/
|
|
void
|
|
logerror(type)
|
|
const char *type;
|
|
{
|
|
char buf[512];
|
|
|
|
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;
|
|
int was_initialized;
|
|
char buf[100];
|
|
int i;
|
|
|
|
was_initialized = Initialized;
|
|
Initialized = 0; /* Don't log SIGCHLDs. */
|
|
for (f = Files; f != NULL; f = f->f_next) {
|
|
/* flush any pending output */
|
|
if (f->f_prevcount)
|
|
fprintlog(f, 0, (char *)NULL);
|
|
if (f->f_type == F_PIPE)
|
|
(void)close(f->f_file);
|
|
}
|
|
Initialized = was_initialized;
|
|
if (signo) {
|
|
dprintf("syslogd: exiting on signal %d\n", signo);
|
|
(void)sprintf(buf, "exiting on signal %d", signo);
|
|
errno = 0;
|
|
logerror(buf);
|
|
}
|
|
for (i = 0; i < nfunix; i++)
|
|
if (funixn[i] && funix[i] != -1)
|
|
(void)unlink(funixn[i]);
|
|
exit(1);
|
|
}
|
|
|
|
/*
|
|
* 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];
|
|
char host[MAXHOSTNAMELEN];
|
|
|
|
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_FORW:
|
|
case F_CONSOLE:
|
|
case F_TTY:
|
|
(void)close(f->f_file);
|
|
break;
|
|
case F_PIPE:
|
|
(void)close(f->f_file);
|
|
if (f->f_un.f_pipe.f_pid > 0)
|
|
deadq_enter(f->f_un.f_pipe.f_pid,
|
|
f->f_un.f_pipe.f_pname);
|
|
f->f_un.f_pipe.f_pid = 0;
|
|
break;
|
|
}
|
|
next = f->f_next;
|
|
if (f->f_program) free(f->f_program);
|
|
if (f->f_host) free(f->f_host);
|
|
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(host, "*");
|
|
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 != '!' && *p != '+' && *p != '-')
|
|
continue;
|
|
}
|
|
if (*p == '+' || *p == '-') {
|
|
host[0] = *p++;
|
|
while (isspace(*p)) p++;
|
|
if ((!*p) || (*p == '*')) {
|
|
strcpy(host, "*");
|
|
continue;
|
|
}
|
|
if (*p == '@')
|
|
p = LocalHostName;
|
|
for (i = 1; i < MAXHOSTNAMELEN - 1; i++) {
|
|
if (!isalnum(*p) && *p != '.' && *p != '-')
|
|
break;
|
|
host[i] = *p++;
|
|
}
|
|
host[i] = '\0';
|
|
continue;
|
|
}
|
|
if (*p == '!') {
|
|
p++;
|
|
while (isspace(*p)) p++;
|
|
if ((!*p) || (*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, host);
|
|
}
|
|
|
|
/* 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:
|
|
printf("%s", f->f_un.f_fname);
|
|
break;
|
|
|
|
case F_CONSOLE:
|
|
case F_TTY:
|
|
printf("%s%s", _PATH_DEV, f->f_un.f_fname);
|
|
break;
|
|
|
|
case F_FORW:
|
|
printf("%s", f->f_un.f_forw.f_hname);
|
|
break;
|
|
|
|
case F_PIPE:
|
|
printf("%s", f->f_un.f_pipe.f_pname);
|
|
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, host)
|
|
char *line;
|
|
struct filed *f;
|
|
char *prog;
|
|
char *host;
|
|
{
|
|
struct addrinfo hints, *res;
|
|
int error, i, pri;
|
|
char *bp, *p, *q;
|
|
char buf[MAXLINE], ebuf[100];
|
|
|
|
dprintf("cfline(\"%s\", f, \"%s\", \"%s\")\n", line, prog, host);
|
|
|
|
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 hostname if any */
|
|
if (host && *host == '*')
|
|
host = NULL;
|
|
if (host)
|
|
f->f_host = strdup(host);
|
|
|
|
/* save program name if any */
|
|
if (prog && *prog == '*')
|
|
prog = NULL;
|
|
if (prog)
|
|
f->f_program = strdup(prog);
|
|
|
|
/* scan through the list of selectors */
|
|
for (p = line; *p && *p != '\t' && *p != ' ';) {
|
|
int pri_done;
|
|
int pri_cmp;
|
|
|
|
/* find the end of this facility name list */
|
|
for (q = p; *q && *q != '\t' && *q != ' ' && *q++ != '.'; )
|
|
continue;
|
|
|
|
/* get the priority comparison */
|
|
pri_cmp = 0;
|
|
pri_done = 0;
|
|
while (!pri_done) {
|
|
switch (*q) {
|
|
case '<':
|
|
pri_cmp |= PRI_LT;
|
|
q++;
|
|
break;
|
|
case '=':
|
|
pri_cmp |= PRI_EQ;
|
|
q++;
|
|
break;
|
|
case '>':
|
|
pri_cmp |= PRI_GT;
|
|
q++;
|
|
break;
|
|
default:
|
|
pri_done++;
|
|
break;
|
|
}
|
|
}
|
|
if (!pri_cmp)
|
|
pri_cmp = (UniquePriority)
|
|
? (PRI_EQ)
|
|
: (PRI_EQ | PRI_GT)
|
|
;
|
|
|
|
/* 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)snprintf(ebuf, sizeof 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;
|
|
f->f_pcmp[i] = pri_cmp;
|
|
}
|
|
else {
|
|
i = decode(buf, facilitynames);
|
|
if (i < 0) {
|
|
(void)snprintf(ebuf, sizeof ebuf,
|
|
"unknown facility name \"%s\"",
|
|
buf);
|
|
logerror(ebuf);
|
|
return;
|
|
}
|
|
f->f_pmask[i >> 3] = pri;
|
|
f->f_pcmp[i >> 3] = pri_cmp;
|
|
}
|
|
while (*p == ',' || *p == ' ')
|
|
p++;
|
|
}
|
|
|
|
p = q;
|
|
}
|
|
|
|
/* skip to action part */
|
|
while (*p == '\t' || *p == ' ')
|
|
p++;
|
|
|
|
switch (*p)
|
|
{
|
|
case '@':
|
|
(void)strncpy(f->f_un.f_forw.f_hname, ++p,
|
|
sizeof(f->f_un.f_forw.f_hname)-1);
|
|
f->f_un.f_forw.f_hname[sizeof(f->f_un.f_forw.f_hname)-1] = '\0';
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_family = family;
|
|
hints.ai_socktype = SOCK_DGRAM;
|
|
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;
|
|
break;
|
|
|
|
case '/':
|
|
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)) {
|
|
if (strcmp(p, ctty) == 0)
|
|
f->f_type = F_CONSOLE;
|
|
else
|
|
f->f_type = F_TTY;
|
|
(void)strcpy(f->f_un.f_fname, p + sizeof _PATH_DEV - 1);
|
|
} else {
|
|
(void)strcpy(f->f_un.f_fname, p);
|
|
f->f_type = F_FILE;
|
|
}
|
|
break;
|
|
|
|
case '|':
|
|
f->f_un.f_pipe.f_pid = 0;
|
|
(void)strcpy(f->f_un.f_pipe.f_pname, p + 1);
|
|
f->f_type = F_PIPE;
|
|
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);
|
|
}
|
|
|
|
/*
|
|
* fork off and become a daemon, but wait for the child to come online
|
|
* before returing to the parent, or we get disk thrashing at boot etc.
|
|
* Set a timer so we don't hang forever if it wedges.
|
|
*/
|
|
int
|
|
waitdaemon(nochdir, noclose, maxwait)
|
|
int nochdir, noclose, maxwait;
|
|
{
|
|
int fd;
|
|
int status;
|
|
pid_t pid, childpid;
|
|
|
|
switch (childpid = fork()) {
|
|
case -1:
|
|
return (-1);
|
|
case 0:
|
|
break;
|
|
default:
|
|
signal(SIGALRM, timedout);
|
|
alarm(maxwait);
|
|
while ((pid = wait3(&status, 0, NULL)) != -1) {
|
|
if (WIFEXITED(status))
|
|
errx(1, "child pid %d exited with return code %d",
|
|
pid, WEXITSTATUS(status));
|
|
if (WIFSIGNALED(status))
|
|
errx(1, "child pid %d exited on signal %d%s",
|
|
pid, WTERMSIG(status),
|
|
WCOREDUMP(status) ? " (core dumped)" :
|
|
"");
|
|
if (pid == childpid) /* it's gone... */
|
|
break;
|
|
}
|
|
exit(0);
|
|
}
|
|
|
|
if (setsid() == -1)
|
|
return (-1);
|
|
|
|
if (!nochdir)
|
|
(void)chdir("/");
|
|
|
|
if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
|
|
(void)dup2(fd, STDIN_FILENO);
|
|
(void)dup2(fd, STDOUT_FILENO);
|
|
(void)dup2(fd, STDERR_FILENO);
|
|
if (fd > 2)
|
|
(void)close (fd);
|
|
}
|
|
return (getppid());
|
|
}
|
|
|
|
/*
|
|
* We get a SIGALRM from the child when it's running and finished doing it's
|
|
* fsync()'s or O_SYNC writes for all the boot messages.
|
|
*
|
|
* We also get a signal from the kernel if the timer expires, so check to
|
|
* see what happened.
|
|
*/
|
|
void
|
|
timedout(sig)
|
|
int sig __unused;
|
|
{
|
|
int left;
|
|
left = alarm(0);
|
|
signal(SIGALRM, SIG_DFL);
|
|
if (left == 0)
|
|
errx(1, "timed out waiting for child");
|
|
else
|
|
exit(0);
|
|
}
|
|
|
|
/*
|
|
* Add `s' to the list of allowable peer addresses to accept messages
|
|
* from.
|
|
*
|
|
* `s' is a string in the form:
|
|
*
|
|
* [*]domainname[:{servicename|portnumber|*}]
|
|
*
|
|
* or
|
|
*
|
|
* netaddr/maskbits[:{servicename|portnumber|*}]
|
|
*
|
|
* Returns -1 on error, 0 if the argument was valid.
|
|
*/
|
|
int
|
|
allowaddr(s)
|
|
char *s;
|
|
{
|
|
char *cp1, *cp2;
|
|
struct allowedpeer ap;
|
|
struct servent *se;
|
|
int masklen = -1;
|
|
struct addrinfo hints, *res;
|
|
struct in_addr *addrp, *maskp;
|
|
u_int32_t *mask6p;
|
|
char ip[NI_MAXHOST];
|
|
|
|
#ifdef INET6
|
|
if (*s != '[' || (cp1 = strchr(s + 1, ']')) == NULL)
|
|
#endif
|
|
cp1 = s;
|
|
if ((cp1 = strrchr(cp1, ':'))) {
|
|
/* service/port provided */
|
|
*cp1++ = '\0';
|
|
if (strlen(cp1) == 1 && *cp1 == '*')
|
|
/* any port allowed */
|
|
ap.port = 0;
|
|
else if ((se = getservbyname(cp1, "udp")))
|
|
ap.port = ntohs(se->s_port);
|
|
else {
|
|
ap.port = strtol(cp1, &cp2, 0);
|
|
if (*cp2 != '\0')
|
|
return -1; /* port not numeric */
|
|
}
|
|
} else {
|
|
if ((se = getservbyname("syslog", "udp")))
|
|
ap.port = ntohs(se->s_port);
|
|
else
|
|
/* sanity, should not happen */
|
|
ap.port = 514;
|
|
}
|
|
|
|
if ((cp1 = strchr(s, '/')) != NULL &&
|
|
strspn(cp1 + 1, "0123456789") == strlen(cp1 + 1)) {
|
|
*cp1 = '\0';
|
|
if ((masklen = atoi(cp1 + 1)) < 0)
|
|
return -1;
|
|
}
|
|
#ifdef INET6
|
|
if (*s == '[') {
|
|
cp2 = s + strlen(s) - 1;
|
|
if (*cp2 == ']') {
|
|
++s;
|
|
*cp2 = '\0';
|
|
} else
|
|
cp2 = NULL;
|
|
} else
|
|
cp2 = NULL;
|
|
#endif
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_family = PF_UNSPEC;
|
|
hints.ai_socktype = SOCK_DGRAM;
|
|
hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
|
|
if (getaddrinfo(s, NULL, &hints, &res) == 0) {
|
|
ap.isnumeric = 1;
|
|
memcpy(&ap.a_addr, res->ai_addr, res->ai_addrlen);
|
|
memset(&ap.a_mask, 0, sizeof(ap.a_mask));
|
|
ap.a_mask.ss_family = res->ai_family;
|
|
if (res->ai_family == AF_INET) {
|
|
ap.a_mask.ss_len = sizeof(struct sockaddr_in);
|
|
maskp = &((struct sockaddr_in *)&ap.a_mask)->sin_addr;
|
|
if (masklen < 0) {
|
|
/* use default netmask */
|
|
addrp = &((struct sockaddr_in *)&ap.a_addr)->sin_addr;
|
|
if (IN_CLASSA(ntohl(addrp->s_addr)))
|
|
maskp->s_addr = htonl(IN_CLASSA_NET);
|
|
else if (IN_CLASSB(ntohl(addrp->s_addr)))
|
|
maskp->s_addr = htonl(IN_CLASSB_NET);
|
|
else
|
|
maskp->s_addr = htonl(IN_CLASSC_NET);
|
|
} else if (masklen <= 32) {
|
|
/* convert masklen to netmask */
|
|
maskp->s_addr = htonl(~((1 << (32 - masklen)) - 1));
|
|
} else {
|
|
freeaddrinfo(res);
|
|
return -1;
|
|
}
|
|
}
|
|
#ifdef INET6
|
|
else if (res->ai_family == AF_INET6 && masklen <= 128) {
|
|
ap.a_mask.ss_len = sizeof(struct sockaddr_in6);
|
|
if (masklen < 0)
|
|
masklen = 128;
|
|
mask6p = (u_int32_t *)&((struct sockaddr_in6 *)&ap.a_mask)->sin6_addr;
|
|
/* convert masklen to netmask */
|
|
while (masklen > 0) {
|
|
if (masklen < 32) {
|
|
*mask6p = htonl(~(0xffffffff >> masklen));
|
|
break;
|
|
}
|
|
*mask6p++ = 0xffffffff;
|
|
masklen -= 32;
|
|
}
|
|
}
|
|
#endif
|
|
else {
|
|
freeaddrinfo(res);
|
|
return -1;
|
|
}
|
|
freeaddrinfo(res);
|
|
} else {
|
|
/* arg `s' is domain name */
|
|
ap.isnumeric = 0;
|
|
ap.a_name = s;
|
|
if (cp1)
|
|
*cp1 = '/';
|
|
#ifdef INET6
|
|
if (cp2) {
|
|
*cp2 = ']';
|
|
--s;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
if (Debug) {
|
|
printf("allowaddr: rule %d: ", NumAllowed);
|
|
if (ap.isnumeric) {
|
|
printf("numeric, ");
|
|
getnameinfo((struct sockaddr *)&ap.a_addr,
|
|
((struct sockaddr *)&ap.a_addr)->sa_len,
|
|
ip, sizeof ip, NULL, 0,
|
|
NI_NUMERICHOST | withscopeid);
|
|
printf("addr = %s, ", ip);
|
|
getnameinfo((struct sockaddr *)&ap.a_mask,
|
|
((struct sockaddr *)&ap.a_mask)->sa_len,
|
|
ip, sizeof ip, NULL, 0,
|
|
NI_NUMERICHOST | withscopeid);
|
|
printf("mask = %s; ", ip);
|
|
} else
|
|
printf("domainname = %s; ", ap.a_name);
|
|
printf("port = %d\n", ap.port);
|
|
}
|
|
|
|
if ((AllowedPeers = realloc(AllowedPeers,
|
|
++NumAllowed * sizeof(struct allowedpeer)))
|
|
== NULL) {
|
|
fprintf(stderr, "Out of memory!\n");
|
|
exit(EX_OSERR);
|
|
}
|
|
memcpy(&AllowedPeers[NumAllowed - 1], &ap, sizeof(struct allowedpeer));
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Validate that the remote peer has permission to log to us.
|
|
*/
|
|
int
|
|
validate(sa, hname)
|
|
struct sockaddr *sa;
|
|
const char *hname;
|
|
{
|
|
int i, j, reject;
|
|
size_t l1, l2;
|
|
char *cp, name[NI_MAXHOST], ip[NI_MAXHOST], port[NI_MAXSERV];
|
|
struct allowedpeer *ap;
|
|
struct sockaddr_in *sin, *a4p = NULL, *m4p = NULL;
|
|
struct sockaddr_in6 *sin6, *a6p = NULL, *m6p = NULL;
|
|
struct addrinfo hints, *res;
|
|
u_short sport;
|
|
|
|
if (NumAllowed == 0)
|
|
/* traditional behaviour, allow everything */
|
|
return 1;
|
|
|
|
strlcpy(name, hname, sizeof name);
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_family = PF_UNSPEC;
|
|
hints.ai_socktype = SOCK_DGRAM;
|
|
hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
|
|
if (getaddrinfo(name, NULL, &hints, &res) == 0)
|
|
freeaddrinfo(res);
|
|
else if (strchr(name, '.') == NULL) {
|
|
strlcat(name, ".", sizeof name);
|
|
strlcat(name, LocalDomain, sizeof name);
|
|
}
|
|
if (getnameinfo(sa, sa->sa_len, ip, sizeof ip, port, sizeof port,
|
|
NI_NUMERICHOST | withscopeid | NI_NUMERICSERV) != 0)
|
|
return 0; /* for safety, should not occur */
|
|
dprintf("validate: dgram from IP %s, port %s, name %s;\n",
|
|
ip, port, name);
|
|
sport = atoi(port);
|
|
|
|
/* now, walk down the list */
|
|
for (i = 0, ap = AllowedPeers; i < NumAllowed; i++, ap++) {
|
|
if (ap->port != 0 && ap->port != sport) {
|
|
dprintf("rejected in rule %d due to port mismatch.\n", i);
|
|
continue;
|
|
}
|
|
|
|
if (ap->isnumeric) {
|
|
if (ap->a_addr.ss_family != sa->sa_family) {
|
|
dprintf("rejected in rule %d due to address family mismatch.\n", i);
|
|
continue;
|
|
}
|
|
if (ap->a_addr.ss_family == AF_INET) {
|
|
sin = (struct sockaddr_in *)sa;
|
|
a4p = (struct sockaddr_in *)&ap->a_addr;
|
|
m4p = (struct sockaddr_in *)&ap->a_mask;
|
|
if ((sin->sin_addr.s_addr & m4p->sin_addr.s_addr)
|
|
!= a4p->sin_addr.s_addr) {
|
|
dprintf("rejected in rule %d due to IP mismatch.\n", i);
|
|
continue;
|
|
}
|
|
}
|
|
#ifdef INET6
|
|
else if (ap->a_addr.ss_family == AF_INET6) {
|
|
sin6 = (struct sockaddr_in6 *)sa;
|
|
a6p = (struct sockaddr_in6 *)&ap->a_addr;
|
|
m6p = (struct sockaddr_in6 *)&ap->a_mask;
|
|
#ifdef NI_WITHSCOPEID
|
|
if (a6p->sin6_scope_id != 0 &&
|
|
sin6->sin6_scope_id != a6p->sin6_scope_id) {
|
|
dprintf("rejected in rule %d due to scope mismatch.\n", i);
|
|
continue;
|
|
}
|
|
#endif
|
|
reject = 0;
|
|
for (j = 0; j < 16; j += 4) {
|
|
if ((*(u_int32_t *)&sin6->sin6_addr.s6_addr[i] & *(u_int32_t *)&m6p->sin6_addr.s6_addr[i])
|
|
!= *(u_int32_t *)&a6p->sin6_addr.s6_addr[i]) {
|
|
++reject;
|
|
break;
|
|
}
|
|
}
|
|
if (reject) {
|
|
dprintf("rejected in rule %d due to IP mismatch.\n", i);
|
|
continue;
|
|
}
|
|
}
|
|
#endif
|
|
else
|
|
continue;
|
|
} else {
|
|
cp = ap->a_name;
|
|
l1 = strlen(name);
|
|
if (*cp == '*') {
|
|
/* allow wildmatch */
|
|
cp++;
|
|
l2 = strlen(cp);
|
|
if (l2 > l1 || memcmp(cp, &name[l1 - l2], l2) != 0) {
|
|
dprintf("rejected in rule %d due to name mismatch.\n", i);
|
|
continue;
|
|
}
|
|
} else {
|
|
/* exact match */
|
|
l2 = strlen(cp);
|
|
if (l2 != l1 || memcmp(cp, name, l1) != 0) {
|
|
dprintf("rejected in rule %d due to name mismatch.\n", i);
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
dprintf("accepted in rule %d.\n", i);
|
|
return 1; /* hooray! */
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Fairly similar to popen(3), but returns an open descriptor, as
|
|
* opposed to a FILE *.
|
|
*/
|
|
int
|
|
p_open(prog, pid)
|
|
char *prog;
|
|
pid_t *pid;
|
|
{
|
|
int pfd[2], nulldesc, i;
|
|
sigset_t omask, mask;
|
|
char *argv[4]; /* sh -c cmd NULL */
|
|
char errmsg[200];
|
|
|
|
if (pipe(pfd) == -1)
|
|
return -1;
|
|
if ((nulldesc = open(_PATH_DEVNULL, O_RDWR)) == -1)
|
|
/* we are royally screwed anyway */
|
|
return -1;
|
|
|
|
sigemptyset(&mask);
|
|
sigaddset(&mask, SIGALRM);
|
|
sigaddset(&mask, SIGHUP);
|
|
sigprocmask(SIG_BLOCK, &mask, &omask);
|
|
switch ((*pid = fork())) {
|
|
case -1:
|
|
sigprocmask(SIG_SETMASK, &omask, 0);
|
|
close(nulldesc);
|
|
return -1;
|
|
|
|
case 0:
|
|
argv[0] = "sh";
|
|
argv[1] = "-c";
|
|
argv[2] = prog;
|
|
argv[3] = NULL;
|
|
|
|
alarm(0);
|
|
(void)setsid(); /* Avoid catching SIGHUPs. */
|
|
|
|
/*
|
|
* Throw away pending signals, and reset signal
|
|
* behaviour to standard values.
|
|
*/
|
|
signal(SIGALRM, SIG_IGN);
|
|
signal(SIGHUP, SIG_IGN);
|
|
sigprocmask(SIG_SETMASK, &omask, 0);
|
|
signal(SIGPIPE, SIG_DFL);
|
|
signal(SIGQUIT, SIG_DFL);
|
|
signal(SIGALRM, SIG_DFL);
|
|
signal(SIGHUP, SIG_DFL);
|
|
|
|
dup2(pfd[0], STDIN_FILENO);
|
|
dup2(nulldesc, STDOUT_FILENO);
|
|
dup2(nulldesc, STDERR_FILENO);
|
|
for (i = getdtablesize(); i > 2; i--)
|
|
(void) close(i);
|
|
|
|
(void) execvp(_PATH_BSHELL, argv);
|
|
_exit(255);
|
|
}
|
|
|
|
sigprocmask(SIG_SETMASK, &omask, 0);
|
|
close(nulldesc);
|
|
close(pfd[0]);
|
|
/*
|
|
* Avoid blocking on a hung pipe. With O_NONBLOCK, we are
|
|
* supposed to get an EWOULDBLOCK on writev(2), which is
|
|
* caught by the logic above anyway, which will in turn close
|
|
* the pipe, and fork a new logging subprocess if necessary.
|
|
* The stale subprocess will be killed some time later unless
|
|
* it terminated itself due to closing its input pipe (so we
|
|
* get rid of really dead puppies).
|
|
*/
|
|
if (fcntl(pfd[1], F_SETFL, O_NONBLOCK) == -1) {
|
|
/* This is bad. */
|
|
(void)snprintf(errmsg, sizeof errmsg,
|
|
"Warning: cannot change pipe to PID %d to "
|
|
"non-blocking behaviour.",
|
|
(int)*pid);
|
|
logerror(errmsg);
|
|
}
|
|
return pfd[1];
|
|
}
|
|
|
|
void
|
|
deadq_enter(pid, name)
|
|
pid_t pid;
|
|
const char *name;
|
|
{
|
|
dq_t p;
|
|
int status;
|
|
|
|
/*
|
|
* Be paranoid, if we can't signal the process, don't enter it
|
|
* into the dead queue (perhaps it's already dead). If possible,
|
|
* we try to fetch and log the child's status.
|
|
*/
|
|
if (kill(pid, 0) != 0) {
|
|
if (waitpid(pid, &status, WNOHANG) > 0)
|
|
log_deadchild(pid, status, name);
|
|
return;
|
|
}
|
|
|
|
p = malloc(sizeof(struct deadq_entry));
|
|
if (p == 0) {
|
|
errno = 0;
|
|
logerror("panic: out of virtual memory!");
|
|
exit(1);
|
|
}
|
|
|
|
p->dq_pid = pid;
|
|
p->dq_timeout = DQ_TIMO_INIT;
|
|
TAILQ_INSERT_TAIL(&deadq_head, p, dq_entries);
|
|
}
|
|
|
|
int
|
|
deadq_remove(pid)
|
|
pid_t pid;
|
|
{
|
|
dq_t q;
|
|
|
|
for (q = TAILQ_FIRST(&deadq_head); q != NULL; q = TAILQ_NEXT(q, dq_entries))
|
|
if (q->dq_pid == pid) {
|
|
TAILQ_REMOVE(&deadq_head, q, dq_entries);
|
|
free(q);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
log_deadchild(pid, status, name)
|
|
pid_t pid;
|
|
int status;
|
|
const char *name;
|
|
{
|
|
int code;
|
|
char buf[256];
|
|
const char *reason;
|
|
|
|
errno = 0; /* Keep strerror() stuff out of logerror messages. */
|
|
if (WIFSIGNALED(status)) {
|
|
reason = "due to signal";
|
|
code = WTERMSIG(status);
|
|
} else {
|
|
reason = "with status";
|
|
code = WEXITSTATUS(status);
|
|
if (code == 0)
|
|
return;
|
|
}
|
|
(void)snprintf(buf, sizeof buf,
|
|
"Logging subprocess %d (%s) exited %s %d.",
|
|
pid, name, reason, code);
|
|
logerror(buf);
|
|
}
|
|
|
|
int *
|
|
socksetup(af)
|
|
int af;
|
|
{
|
|
struct addrinfo hints, *res, *r;
|
|
int error, maxs, *s, *socks;
|
|
|
|
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++);
|
|
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");
|
|
continue;
|
|
}
|
|
#ifdef IPV6_BINDV6ONLY
|
|
if (r->ai_family == AF_INET6) {
|
|
int on = 1;
|
|
if (setsockopt(*s, IPPROTO_IPV6, IPV6_BINDV6ONLY,
|
|
(char *)&on, sizeof (on)) < 0) {
|
|
logerror("setsockopt");
|
|
close(*s);
|
|
continue;
|
|
}
|
|
}
|
|
#endif
|
|
if (bind(*s, r->ai_addr, r->ai_addrlen) < 0) {
|
|
close(*s);
|
|
logerror("bind");
|
|
continue;
|
|
}
|
|
|
|
(*socks)++;
|
|
s++;
|
|
}
|
|
|
|
if (*socks == 0) {
|
|
free(socks);
|
|
if (Debug)
|
|
return(NULL);
|
|
else
|
|
die(0);
|
|
}
|
|
if (res)
|
|
freeaddrinfo(res);
|
|
|
|
return(socks);
|
|
}
|