71571f452f
RFC 3164. PR: 200933 Submitted by: maxim Reported by: Konstantin Pavlov <thresh nginx.com> MFC after: 2 weeks
3064 lines
70 KiB
C
3064 lines
70 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. 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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#endif /* not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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 maximum 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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/* Maximum number of characters in time of last occurrence */
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#define MAXDATELEN 16
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#define MAXLINE 1024 /* maximum line length */
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#define MAXSVLINE MAXLINE /* 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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#define RCVBUF_MINSIZE (80 * 1024) /* minimum size of dgram rcv buffer */
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <sys/queue.h>
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#include <sys/resource.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/syslimits.h>
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#include <sys/time.h>
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#include <sys/uio.h>
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#include <sys/un.h>
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#include <sys/wait.h>
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#if defined(INET) || defined(INET6)
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#endif
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#include <netdb.h>
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#include <ctype.h>
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#include <dirent.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 <fnmatch.h>
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#include <libutil.h>
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#include <limits.h>
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#include <paths.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 <utmpx.h>
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#include "pathnames.h"
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#include "ttymsg.h"
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#define SYSLOG_NAMES
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#include <sys/syslog.h>
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static const char *ConfFile = _PATH_LOGCONF;
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static const char *PidFile = _PATH_LOGPID;
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static const char ctty[] = _PATH_CONSOLE;
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static const char include_str[] = "include";
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static const char include_ext[] = ".conf";
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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 sstosa(ss) ((struct sockaddr *)(ss))
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#ifdef INET
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#define sstosin(ss) ((struct sockaddr_in *)(void *)(ss))
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#define satosin(sa) ((struct sockaddr_in *)(void *)(sa))
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#endif
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#ifdef INET6
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#define sstosin6(ss) ((struct sockaddr_in6 *)(void *)(ss))
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#define satosin6(sa) ((struct sockaddr_in6 *)(void *)(sa))
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#define s6_addr32 __u6_addr.__u6_addr32
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#define IN6_ARE_MASKED_ADDR_EQUAL(d, a, m) ( \
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(((d)->s6_addr32[0] ^ (a)->s6_addr32[0]) & (m)->s6_addr32[0]) == 0 && \
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(((d)->s6_addr32[1] ^ (a)->s6_addr32[1]) & (m)->s6_addr32[1]) == 0 && \
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(((d)->s6_addr32[2] ^ (a)->s6_addr32[2]) & (m)->s6_addr32[2]) == 0 && \
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(((d)->s6_addr32[3] ^ (a)->s6_addr32[3]) & (m)->s6_addr32[3]) == 0 )
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#endif
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/*
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* List of peers and sockets for binding.
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*/
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struct peer {
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const char *pe_name;
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const char *pe_serv;
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mode_t pe_mode;
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STAILQ_ENTRY(peer) next;
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};
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static STAILQ_HEAD(, peer) pqueue = STAILQ_HEAD_INITIALIZER(pqueue);
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struct socklist {
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struct sockaddr_storage sl_ss;
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int sl_socket;
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struct peer *sl_peer;
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int (*sl_recv)(struct socklist *);
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STAILQ_ENTRY(socklist) next;
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};
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static STAILQ_HEAD(, socklist) shead = STAILQ_HEAD_INITIALIZER(shead);
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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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* We require f_file to be valid if f_type is F_FILE, F_CONSOLE, F_TTY
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* or if f_type if F_PIPE and f_pid > 0.
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*/
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struct filed {
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STAILQ_ENTRY(filed) 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][MAXLOGNAME];
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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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#define fu_uname f_un.f_uname
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#define fu_forw_hname f_un.f_forw.f_hname
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#define fu_forw_addr f_un.f_forw.f_addr
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#define fu_fname f_un.f_fname
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#define fu_pipe_pname f_un.f_pipe.f_pname
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#define fu_pipe_pid f_un.f_pipe.f_pid
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char f_prevline[MAXSVLINE]; /* last message logged */
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char f_lasttime[MAXDATELEN]; /* 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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u_int f_repeatcount; /* number of "repeated" msgs */
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int f_flags; /* file-specific flags */
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#define FFLAG_SYNC 0x01
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#define FFLAG_NEEDSYNC 0x02
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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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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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static TAILQ_HEAD(, deadq_entry) deadq_head =
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TAILQ_HEAD_INITIALIZER(deadq_head);
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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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/*
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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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STAILQ_ENTRY(allowedpeer) next;
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};
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static STAILQ_HEAD(, allowedpeer) aphead = STAILQ_HEAD_INITIALIZER(aphead);
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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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static int repeatinterval[] = { 30, 120, 600 }; /* # of secs before flush */
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#define MAXREPEAT (nitems(repeatinterval) - 1)
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#define REPEATTIME(f) ((f)->f_time + repeatinterval[(f)->f_repeatcount])
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#define BACKOFF(f) do { \
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if (++(f)->f_repeatcount > MAXREPEAT) \
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(f)->f_repeatcount = MAXREPEAT; \
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} while (0)
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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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static const char *TypeNames[] = {
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"UNUSED", "FILE", "TTY", "CONSOLE",
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"FORW", "USERS", "WALL", "PIPE"
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};
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static STAILQ_HEAD(, filed) fhead =
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STAILQ_HEAD_INITIALIZER(fhead); /* Log files that we write to */
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static struct filed consfile; /* Console */
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static int Debug; /* debug flag */
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static int Foreground = 0; /* Run in foreground, instead of daemonizing */
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static int resolve = 1; /* resolve hostname */
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static char LocalHostName[MAXHOSTNAMELEN]; /* our hostname */
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static const char *LocalDomain; /* our local domain name */
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static int Initialized; /* set when we have initialized ourselves */
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static int MarkInterval = 20 * 60; /* interval between marks in seconds */
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static int MarkSeq; /* mark sequence number */
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static int NoBind; /* don't bind() as suggested by RFC 3164 */
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static int SecureMode; /* when true, receive only unix domain socks */
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#ifdef INET6
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static int family = PF_UNSPEC; /* protocol family (IPv4, IPv6 or both) */
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#else
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static int family = PF_INET; /* protocol family (IPv4 only) */
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#endif
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static int mask_C1 = 1; /* mask characters from 0x80 - 0x9F */
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static int send_to_all; /* send message to all IPv4/IPv6 addresses */
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static int use_bootfile; /* log entire bootfile for every kern msg */
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static int no_compress; /* don't compress messages (1=pipes, 2=all) */
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static int logflags = O_WRONLY|O_APPEND; /* flags used to open log files */
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static char bootfile[MAXLINE+1]; /* booted kernel file */
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static int RemoteAddDate; /* Always set the date on remote messages */
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static int UniquePriority; /* Only log specified priority? */
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static int LogFacPri; /* Put facility and priority in log message: */
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/* 0=no, 1=numeric, 2=names */
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static int KeepKernFac; /* Keep remotely logged kernel facility */
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static int needdofsync = 0; /* Are any file(s) waiting to be fsynced? */
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static struct pidfh *pfh;
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static int sigpipe[2]; /* Pipe to catch a signal during select(). */
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static volatile sig_atomic_t MarkSet, WantDie, WantInitialize, WantReapchild;
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static int allowaddr(char *);
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static int addfile(struct filed *);
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static int addpeer(struct peer *);
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static int addsock(struct sockaddr *, socklen_t, struct socklist *);
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static struct filed *cfline(const char *, const char *, const char *);
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static const char *cvthname(struct sockaddr *);
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static void deadq_enter(pid_t, const char *);
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static int deadq_remove(struct deadq_entry *);
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static int deadq_removebypid(pid_t);
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static int decode(const char *, const CODE *);
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static void die(int) __dead2;
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static void dodie(int);
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static void dofsync(void);
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static void domark(int);
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static void fprintlog(struct filed *, int, const char *);
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static void init(int);
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static void logerror(const char *);
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static void logmsg(int, const char *, const char *, int);
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static void log_deadchild(pid_t, int, const char *);
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static void markit(void);
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static int socksetup(struct peer *);
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static int socklist_recv_file(struct socklist *);
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static int socklist_recv_sock(struct socklist *);
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static int socklist_recv_signal(struct socklist *);
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static void sighandler(int);
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static int skip_message(const char *, const char *, int);
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static void printline(const char *, char *, int);
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static void printsys(char *);
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static int p_open(const char *, pid_t *);
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static void reapchild(int);
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static const char *ttymsg_check(struct iovec *, int, char *, int);
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static void usage(void);
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static int validate(struct sockaddr *, const char *);
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static void unmapped(struct sockaddr *);
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static void wallmsg(struct filed *, struct iovec *, const int iovlen);
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static int waitdaemon(int);
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static void timedout(int);
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static void increase_rcvbuf(int);
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static void
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close_filed(struct filed *f)
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{
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if (f == NULL || f->f_file == -1)
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return;
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switch (f->f_type) {
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case F_FILE:
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case F_TTY:
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case F_CONSOLE:
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case F_FORW:
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f->f_type = F_UNUSED;
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break;
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case F_PIPE:
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f->fu_pipe_pid = 0;
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break;
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}
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(void)close(f->f_file);
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f->f_file = -1;
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}
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static int
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addfile(struct filed *f0)
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{
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struct filed *f;
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f = calloc(1, sizeof(*f));
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if (f == NULL)
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err(1, "malloc failed");
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*f = *f0;
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STAILQ_INSERT_TAIL(&fhead, f, next);
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return (0);
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}
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static int
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addpeer(struct peer *pe0)
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{
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struct peer *pe;
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pe = calloc(1, sizeof(*pe));
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if (pe == NULL)
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err(1, "malloc failed");
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*pe = *pe0;
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STAILQ_INSERT_TAIL(&pqueue, pe, next);
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return (0);
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}
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static int
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addsock(struct sockaddr *sa, socklen_t sa_len, struct socklist *sl0)
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{
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struct socklist *sl;
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sl = calloc(1, sizeof(*sl));
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if (sl == NULL)
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err(1, "malloc failed");
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*sl = *sl0;
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if (sa != NULL && sa_len > 0)
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memcpy(&sl->sl_ss, sa, sa_len);
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STAILQ_INSERT_TAIL(&shead, sl, next);
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return (0);
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}
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|
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int
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main(int argc, char *argv[])
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{
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int ch, i, s, fdsrmax = 0, bflag = 0, pflag = 0, Sflag = 0;
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fd_set *fdsr = NULL;
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struct timeval tv, *tvp;
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struct peer *pe;
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struct socklist *sl;
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pid_t ppid = 1, spid;
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char *p;
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if (madvise(NULL, 0, MADV_PROTECT) != 0)
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dprintf("madvise() failed: %s\n", strerror(errno));
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|
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while ((ch = getopt(argc, argv, "468Aa:b:cCdf:Fkl:m:nNop:P:sS:Tuv"))
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!= -1)
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switch (ch) {
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#ifdef INET
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case '4':
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family = PF_INET;
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break;
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#endif
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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 '8':
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mask_C1 = 0;
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break;
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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 'b':
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bflag = 1;
|
|
p = strchr(optarg, ']');
|
|
if (p != NULL)
|
|
p = strchr(p + 1, ':');
|
|
else {
|
|
p = strchr(optarg, ':');
|
|
if (p != NULL && strchr(p + 1, ':') != NULL)
|
|
p = NULL; /* backward compatibility */
|
|
}
|
|
if (p == NULL) {
|
|
/* A hostname or filename only. */
|
|
addpeer(&(struct peer){
|
|
.pe_name = optarg,
|
|
.pe_serv = "syslog"
|
|
});
|
|
} else {
|
|
/* The case of "name:service". */
|
|
*p++ = '\0';
|
|
addpeer(&(struct peer){
|
|
.pe_serv = p,
|
|
.pe_name = (strlen(optarg) == 0) ?
|
|
NULL : optarg,
|
|
});
|
|
}
|
|
break;
|
|
case 'c':
|
|
no_compress++;
|
|
break;
|
|
case 'C':
|
|
logflags |= O_CREAT;
|
|
break;
|
|
case 'd': /* debug */
|
|
Debug++;
|
|
break;
|
|
case 'f': /* configuration file */
|
|
ConfFile = optarg;
|
|
break;
|
|
case 'F': /* run in foreground instead of daemon */
|
|
Foreground++;
|
|
break;
|
|
case 'k': /* keep remote kern fac */
|
|
KeepKernFac = 1;
|
|
break;
|
|
case 'l':
|
|
case 'p':
|
|
case 'S':
|
|
{
|
|
long perml;
|
|
mode_t mode;
|
|
char *name, *ep;
|
|
|
|
if (ch == 'l')
|
|
mode = DEFFILEMODE;
|
|
else if (ch == 'p') {
|
|
mode = DEFFILEMODE;
|
|
pflag = 1;
|
|
} else if (ch == 'S') {
|
|
mode = S_IRUSR | S_IWUSR;
|
|
Sflag = 1;
|
|
}
|
|
if (optarg[0] == '/')
|
|
name = optarg;
|
|
else if ((name = strchr(optarg, ':')) != NULL) {
|
|
*name++ = '\0';
|
|
if (name[0] != '/')
|
|
errx(1, "socket name must be absolute "
|
|
"path");
|
|
if (isdigit(*optarg)) {
|
|
perml = strtol(optarg, &ep, 8);
|
|
if (*ep || perml < 0 ||
|
|
perml & ~(S_IRWXU|S_IRWXG|S_IRWXO))
|
|
errx(1, "invalid mode %s, exiting",
|
|
optarg);
|
|
mode = (mode_t )perml;
|
|
} else
|
|
errx(1, "invalid mode %s, exiting",
|
|
optarg);
|
|
} else
|
|
errx(1, "invalid filename %s, exiting",
|
|
optarg);
|
|
addpeer(&(struct peer){
|
|
.pe_name = name,
|
|
.pe_mode = mode
|
|
});
|
|
break;
|
|
}
|
|
case 'm': /* mark interval */
|
|
MarkInterval = atoi(optarg) * 60;
|
|
break;
|
|
case 'N':
|
|
NoBind = 1;
|
|
SecureMode = 1;
|
|
break;
|
|
case 'n':
|
|
resolve = 0;
|
|
break;
|
|
case 'o':
|
|
use_bootfile = 1;
|
|
break;
|
|
case 'P': /* path for alt. PID */
|
|
PidFile = optarg;
|
|
break;
|
|
case 's': /* no network mode */
|
|
SecureMode++;
|
|
break;
|
|
case 'T':
|
|
RemoteAddDate = 1;
|
|
break;
|
|
case 'u': /* only log specified priority */
|
|
UniquePriority++;
|
|
break;
|
|
case 'v': /* log facility and priority */
|
|
LogFacPri++;
|
|
break;
|
|
default:
|
|
usage();
|
|
}
|
|
if ((argc -= optind) != 0)
|
|
usage();
|
|
|
|
/* Pipe to catch a signal during select(). */
|
|
s = pipe2(sigpipe, O_CLOEXEC);
|
|
if (s < 0) {
|
|
err(1, "cannot open a pipe for signals");
|
|
} else {
|
|
addsock(NULL, 0, &(struct socklist){
|
|
.sl_socket = sigpipe[0],
|
|
.sl_recv = socklist_recv_signal
|
|
});
|
|
}
|
|
|
|
/* Listen by default: /dev/klog. */
|
|
s = open(_PATH_KLOG, O_RDONLY | O_NONBLOCK | O_CLOEXEC, 0);
|
|
if (s < 0) {
|
|
dprintf("can't open %s (%d)\n", _PATH_KLOG, errno);
|
|
} else {
|
|
addsock(NULL, 0, &(struct socklist){
|
|
.sl_socket = s,
|
|
.sl_recv = socklist_recv_file,
|
|
});
|
|
}
|
|
/* Listen by default: *:514 if no -b flag. */
|
|
if (bflag == 0)
|
|
addpeer(&(struct peer){
|
|
.pe_serv = "syslog"
|
|
});
|
|
/* Listen by default: /var/run/log if no -p flag. */
|
|
if (pflag == 0)
|
|
addpeer(&(struct peer){
|
|
.pe_name = _PATH_LOG,
|
|
.pe_mode = DEFFILEMODE,
|
|
});
|
|
/* Listen by default: /var/run/logpriv if no -S flag. */
|
|
if (Sflag == 0)
|
|
addpeer(&(struct peer){
|
|
.pe_name = _PATH_LOG_PRIV,
|
|
.pe_mode = S_IRUSR | S_IWUSR,
|
|
});
|
|
STAILQ_FOREACH(pe, &pqueue, next)
|
|
socksetup(pe);
|
|
|
|
pfh = pidfile_open(PidFile, 0600, &spid);
|
|
if (pfh == NULL) {
|
|
if (errno == EEXIST)
|
|
errx(1, "syslogd already running, pid: %d", spid);
|
|
warn("cannot open pid file");
|
|
}
|
|
|
|
if ((!Foreground) && (!Debug)) {
|
|
ppid = waitdaemon(30);
|
|
if (ppid < 0) {
|
|
warn("could not become daemon");
|
|
pidfile_remove(pfh);
|
|
exit(1);
|
|
}
|
|
} else if (Debug)
|
|
setlinebuf(stdout);
|
|
|
|
consfile.f_type = F_CONSOLE;
|
|
(void)strlcpy(consfile.fu_fname, ctty + sizeof _PATH_DEV - 1,
|
|
sizeof(consfile.fu_fname));
|
|
(void)strlcpy(bootfile, getbootfile(), sizeof(bootfile));
|
|
(void)signal(SIGTERM, dodie);
|
|
(void)signal(SIGINT, Debug ? dodie : SIG_IGN);
|
|
(void)signal(SIGQUIT, Debug ? dodie : SIG_IGN);
|
|
(void)signal(SIGHUP, sighandler);
|
|
(void)signal(SIGCHLD, sighandler);
|
|
(void)signal(SIGALRM, domark);
|
|
(void)signal(SIGPIPE, SIG_IGN); /* We'll catch EPIPE instead. */
|
|
(void)alarm(TIMERINTVL);
|
|
|
|
/* tuck my process id away */
|
|
pidfile_write(pfh);
|
|
|
|
dprintf("off & running....\n");
|
|
|
|
tvp = &tv;
|
|
tv.tv_sec = tv.tv_usec = 0;
|
|
|
|
STAILQ_FOREACH(sl, &shead, next) {
|
|
if (sl->sl_socket > fdsrmax)
|
|
fdsrmax = sl->sl_socket;
|
|
}
|
|
fdsr = (fd_set *)calloc(howmany(fdsrmax+1, NFDBITS),
|
|
sizeof(fd_mask));
|
|
if (fdsr == NULL)
|
|
errx(1, "calloc fd_set");
|
|
|
|
for (;;) {
|
|
if (Initialized == 0)
|
|
init(0);
|
|
else if (WantInitialize)
|
|
init(WantInitialize);
|
|
if (WantReapchild)
|
|
reapchild(WantReapchild);
|
|
if (MarkSet)
|
|
markit();
|
|
if (WantDie) {
|
|
free(fdsr);
|
|
die(WantDie);
|
|
}
|
|
|
|
bzero(fdsr, howmany(fdsrmax+1, NFDBITS) *
|
|
sizeof(fd_mask));
|
|
|
|
STAILQ_FOREACH(sl, &shead, next) {
|
|
if (sl->sl_socket != -1 && sl->sl_recv != NULL)
|
|
FD_SET(sl->sl_socket, fdsr);
|
|
}
|
|
i = select(fdsrmax + 1, fdsr, NULL, NULL,
|
|
needdofsync ? &tv : tvp);
|
|
switch (i) {
|
|
case 0:
|
|
dofsync();
|
|
needdofsync = 0;
|
|
if (tvp) {
|
|
tvp = NULL;
|
|
if (ppid != 1)
|
|
kill(ppid, SIGALRM);
|
|
}
|
|
continue;
|
|
case -1:
|
|
if (errno != EINTR)
|
|
logerror("select");
|
|
continue;
|
|
}
|
|
STAILQ_FOREACH(sl, &shead, next) {
|
|
if (FD_ISSET(sl->sl_socket, fdsr))
|
|
(*sl->sl_recv)(sl);
|
|
}
|
|
}
|
|
free(fdsr);
|
|
}
|
|
|
|
static int
|
|
socklist_recv_signal(struct socklist *sl __unused)
|
|
{
|
|
ssize_t len;
|
|
int i, nsig, signo;
|
|
|
|
if (ioctl(sigpipe[0], FIONREAD, &i) != 0) {
|
|
logerror("ioctl(FIONREAD)");
|
|
err(1, "signal pipe read failed");
|
|
}
|
|
nsig = i / sizeof(signo);
|
|
dprintf("# of received signals = %d\n", nsig);
|
|
for (i = 0; i < nsig; i++) {
|
|
len = read(sigpipe[0], &signo, sizeof(signo));
|
|
if (len != sizeof(signo)) {
|
|
logerror("signal pipe read failed");
|
|
err(1, "signal pipe read failed");
|
|
}
|
|
dprintf("Received signal: %d from fd=%d\n", signo,
|
|
sigpipe[0]);
|
|
switch (signo) {
|
|
case SIGHUP:
|
|
WantInitialize = 1;
|
|
break;
|
|
case SIGCHLD:
|
|
WantReapchild = 1;
|
|
break;
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
socklist_recv_sock(struct socklist *sl)
|
|
{
|
|
struct sockaddr_storage ss;
|
|
struct sockaddr *sa = (struct sockaddr *)&ss;
|
|
socklen_t sslen;
|
|
const char *hname;
|
|
char line[MAXLINE + 1];
|
|
int date, len;
|
|
|
|
sslen = sizeof(ss);
|
|
len = recvfrom(sl->sl_socket, line, sizeof(line) - 1, 0, sa, &sslen);
|
|
dprintf("received sa_len = %d\n", sslen);
|
|
if (len == 0)
|
|
return (-1);
|
|
if (len < 0) {
|
|
if (errno != EINTR)
|
|
logerror("recvfrom");
|
|
return (-1);
|
|
}
|
|
/* Received valid data. */
|
|
line[len] = '\0';
|
|
if (sl->sl_ss.ss_family == AF_LOCAL) {
|
|
hname = LocalHostName;
|
|
date = 0;
|
|
} else {
|
|
hname = cvthname(sa);
|
|
unmapped(sa);
|
|
if (validate(sa, hname) == 0)
|
|
hname = NULL;
|
|
date = RemoteAddDate ? ADDDATE : 0;
|
|
}
|
|
if (hname != NULL)
|
|
printline(hname, line, date);
|
|
else
|
|
dprintf("Invalid msg from %s was ignored.", hname);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
unmapped(struct sockaddr *sa)
|
|
{
|
|
#if defined(INET) && defined(INET6)
|
|
struct sockaddr_in6 *sin6;
|
|
struct sockaddr_in sin;
|
|
|
|
if (sa == NULL ||
|
|
sa->sa_family != AF_INET6 ||
|
|
sa->sa_len != sizeof(*sin6))
|
|
return;
|
|
sin6 = satosin6(sa);
|
|
if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
|
|
return;
|
|
sin = (struct sockaddr_in){
|
|
.sin_family = AF_INET,
|
|
.sin_len = sizeof(sin),
|
|
.sin_port = sin6->sin6_port
|
|
};
|
|
memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12],
|
|
sizeof(sin.sin_addr));
|
|
memcpy(sa, &sin, sizeof(sin));
|
|
#else
|
|
if (sa == NULL)
|
|
return;
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
|
|
fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n",
|
|
"usage: syslogd [-468ACcdFknosTuv] [-a allowed_peer]",
|
|
" [-b bind_address] [-f config_file]",
|
|
" [-l [mode:]path] [-m mark_interval]",
|
|
" [-P pid_file] [-p log_socket]",
|
|
" [-S logpriv_socket]");
|
|
exit(1);
|
|
}
|
|
|
|
/*
|
|
* Take a raw input line, decode the message, and print the message
|
|
* on the appropriate log files.
|
|
*/
|
|
static void
|
|
printline(const char *hname, char *msg, int flags)
|
|
{
|
|
char *p, *q;
|
|
long n;
|
|
int c, pri;
|
|
char line[MAXLINE + 1];
|
|
|
|
/* test for special codes */
|
|
p = msg;
|
|
pri = DEFUPRI;
|
|
if (*p == '<') {
|
|
errno = 0;
|
|
n = strtol(p + 1, &q, 10);
|
|
if (*q == '>' && n >= 0 && n < INT_MAX && errno == 0) {
|
|
p = q + 1;
|
|
pri = n;
|
|
}
|
|
}
|
|
if (pri &~ (LOG_FACMASK|LOG_PRIMASK))
|
|
pri = DEFUPRI;
|
|
|
|
/*
|
|
* Don't allow users to log kernel messages.
|
|
* NOTE: since LOG_KERN == 0 this will also match
|
|
* messages with no facility specified.
|
|
*/
|
|
if ((pri & LOG_FACMASK) == 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 (mask_C1 && (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, flags);
|
|
}
|
|
|
|
/*
|
|
* Read /dev/klog while data are available, split into lines.
|
|
*/
|
|
static int
|
|
socklist_recv_file(struct socklist *sl)
|
|
{
|
|
char *p, *q, line[MAXLINE + 1];
|
|
int len, i;
|
|
|
|
len = 0;
|
|
for (;;) {
|
|
i = read(sl->sl_socket, line + len, MAXLINE - 1 - len);
|
|
if (i > 0) {
|
|
line[i + len] = '\0';
|
|
} else {
|
|
if (i < 0 && errno != EINTR && errno != EAGAIN) {
|
|
logerror("klog");
|
|
close(sl->sl_socket);
|
|
sl->sl_socket = -1;
|
|
}
|
|
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);
|
|
|
|
return (len);
|
|
}
|
|
|
|
/*
|
|
* Take a raw input line from /dev/klog, format similar to syslog().
|
|
*/
|
|
static void
|
|
printsys(char *msg)
|
|
{
|
|
char *p, *q;
|
|
long n;
|
|
int flags, isprintf, pri;
|
|
|
|
flags = ISKERNEL | SYNC_FILE | ADDDATE; /* fsync after write */
|
|
p = msg;
|
|
pri = DEFSPRI;
|
|
isprintf = 1;
|
|
if (*p == '<') {
|
|
errno = 0;
|
|
n = strtol(p + 1, &q, 10);
|
|
if (*q == '>' && n >= 0 && n < INT_MAX && errno == 0) {
|
|
p = q + 1;
|
|
pri = n;
|
|
isprintf = 0;
|
|
}
|
|
}
|
|
/*
|
|
* Kernel printf's and LOG_CONSOLE messages have been displayed
|
|
* on the console already.
|
|
*/
|
|
if (isprintf || (pri & LOG_FACMASK) == LOG_CONSOLE)
|
|
flags |= IGN_CONS;
|
|
if (pri &~ (LOG_FACMASK|LOG_PRIMASK))
|
|
pri = DEFSPRI;
|
|
logmsg(pri, p, LocalHostName, flags);
|
|
}
|
|
|
|
static time_t now;
|
|
|
|
/*
|
|
* Match a program or host name against a specification.
|
|
* Return a non-0 value if the message must be ignored
|
|
* based on the specification.
|
|
*/
|
|
static int
|
|
skip_message(const char *name, const char *spec, int checkcase)
|
|
{
|
|
const char *s;
|
|
char prev, next;
|
|
int exclude = 0;
|
|
/* Behaviour on explicit match */
|
|
|
|
if (spec == NULL)
|
|
return 0;
|
|
switch (*spec) {
|
|
case '-':
|
|
exclude = 1;
|
|
/*FALLTHROUGH*/
|
|
case '+':
|
|
spec++;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (checkcase)
|
|
s = strstr (spec, name);
|
|
else
|
|
s = strcasestr (spec, name);
|
|
|
|
if (s != NULL) {
|
|
prev = (s == spec ? ',' : *(s - 1));
|
|
next = *(s + strlen (name));
|
|
|
|
if (prev == ',' && (next == '\0' || next == ','))
|
|
/* Explicit match: skip iff the spec is an
|
|
exclusive one. */
|
|
return exclude;
|
|
}
|
|
|
|
/* No explicit match for this name: skip the message iff
|
|
the spec is an inclusive one. */
|
|
return !exclude;
|
|
}
|
|
|
|
/*
|
|
* Log a message to the appropriate log files, users, etc. based on
|
|
* the priority.
|
|
*/
|
|
static void
|
|
logmsg(int pri, const char *msg, const char *from, int flags)
|
|
{
|
|
struct filed *f;
|
|
int i, j, fac, msglen, prilev;
|
|
const 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);
|
|
|
|
/*
|
|
* Check to see if msg looks non-standard.
|
|
*/
|
|
msglen = strlen(msg);
|
|
if (msglen < MAXDATELEN || 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 += MAXDATELEN;
|
|
msglen -= MAXDATELEN;
|
|
}
|
|
|
|
/* skip leading blanks */
|
|
while (isspace(*msg)) {
|
|
msg++;
|
|
msglen--;
|
|
}
|
|
|
|
/* extract facility and priority level */
|
|
if (flags & MARK)
|
|
fac = LOG_NFACILITIES;
|
|
else
|
|
fac = LOG_FAC(pri);
|
|
|
|
/* Check maximum facility number. */
|
|
if (fac > LOG_NFACILITIES)
|
|
return;
|
|
|
|
prilev = LOG_PRI(pri);
|
|
|
|
/* skip hostname, see RFC 3164 */
|
|
for (i = 0, j = 0; i < NAME_MAX; i++) {
|
|
if (isspace(msg[i])) {
|
|
j = i + 1;
|
|
}
|
|
if (msg[i] == ':')
|
|
break;
|
|
}
|
|
if (j <= msglen) {
|
|
msg += j;
|
|
msglen -= j;
|
|
}
|
|
|
|
/* extract program name */
|
|
for (i = 0; i < NAME_MAX; i++) {
|
|
if (!isprint(msg[i]) || msg[i] == ':' || msg[i] == '[' ||
|
|
msg[i] == '/' || isspace(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",
|
|
use_bootfile ? bootfile : "kernel", msg);
|
|
msg = buf;
|
|
msglen = strlen(buf);
|
|
}
|
|
|
|
/* log the message to the particular outputs */
|
|
if (!Initialized) {
|
|
f = &consfile;
|
|
/*
|
|
* Open in non-blocking mode to avoid hangs during open
|
|
* and close(waiting for the port to drain).
|
|
*/
|
|
f->f_file = open(ctty, O_WRONLY | O_NONBLOCK, 0);
|
|
|
|
if (f->f_file >= 0) {
|
|
(void)strlcpy(f->f_lasttime, timestamp,
|
|
sizeof(f->f_lasttime));
|
|
fprintlog(f, flags, msg);
|
|
close(f->f_file);
|
|
f->f_file = -1;
|
|
}
|
|
return;
|
|
}
|
|
STAILQ_FOREACH(f, &fhead, 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 (skip_message(from, f->f_host, 0))
|
|
continue;
|
|
|
|
/* skip messages with the incorrect program name */
|
|
if (skip_message(prog, f->f_program, 1))
|
|
continue;
|
|
|
|
/* skip message to console if it has already been printed */
|
|
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 (no_compress - (f->f_type != F_PIPE) < 1 &&
|
|
(flags & MARK) == 0 && msglen == f->f_prevlen &&
|
|
!strcmp(msg, f->f_prevline) &&
|
|
!strcasecmp(from, f->f_prevhost)) {
|
|
(void)strlcpy(f->f_lasttime, timestamp,
|
|
sizeof(f->f_lasttime));
|
|
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)strlcpy(f->f_lasttime, timestamp,
|
|
sizeof(f->f_lasttime));
|
|
(void)strlcpy(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);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
dofsync(void)
|
|
{
|
|
struct filed *f;
|
|
|
|
STAILQ_FOREACH(f, &fhead, next) {
|
|
if ((f->f_type == F_FILE) &&
|
|
(f->f_flags & FFLAG_NEEDSYNC)) {
|
|
f->f_flags &= ~FFLAG_NEEDSYNC;
|
|
(void)fsync(f->f_file);
|
|
}
|
|
}
|
|
}
|
|
|
|
#define IOV_SIZE 7
|
|
static void
|
|
fprintlog(struct filed *f, int flags, const char *msg)
|
|
{
|
|
struct iovec iov[IOV_SIZE];
|
|
struct addrinfo *r;
|
|
int l, lsent = 0;
|
|
char line[MAXLINE + 1], repbuf[80], greetings[200], *wmsg = NULL;
|
|
char nul[] = "", space[] = " ", lf[] = "\n", crlf[] = "\r\n";
|
|
const char *msgret;
|
|
|
|
if (f->f_type == F_WALL) {
|
|
/* The time displayed is not synchornized with the other log
|
|
* destinations (like messages). Following fragment was using
|
|
* ctime(&now), which was updating the time every 30 sec.
|
|
* With f_lasttime, time is synchronized correctly.
|
|
*/
|
|
iov[0] = (struct iovec){
|
|
.iov_base = greetings,
|
|
.iov_len = snprintf(greetings, sizeof(greetings),
|
|
"\r\n\7Message from syslogd@%s "
|
|
"at %.24s ...\r\n",
|
|
f->f_prevhost, f->f_lasttime)
|
|
};
|
|
if (iov[0].iov_len >= sizeof(greetings))
|
|
iov[0].iov_len = sizeof(greetings) - 1;
|
|
iov[1] = (struct iovec){
|
|
.iov_base = nul,
|
|
.iov_len = 0
|
|
};
|
|
} else {
|
|
iov[0] = (struct iovec){
|
|
.iov_base = f->f_lasttime,
|
|
.iov_len = strlen(f->f_lasttime)
|
|
};
|
|
iov[1] = (struct iovec){
|
|
.iov_base = space,
|
|
.iov_len = 1
|
|
};
|
|
}
|
|
|
|
if (LogFacPri) {
|
|
static char fp_buf[30]; /* Hollow laugh */
|
|
int fac = f->f_prevpri & LOG_FACMASK;
|
|
int pri = LOG_PRI(f->f_prevpri);
|
|
const char *f_s = NULL;
|
|
char f_n[5]; /* Hollow laugh */
|
|
const char *p_s = NULL;
|
|
char p_n[5]; /* Hollow laugh */
|
|
|
|
if (LogFacPri > 1) {
|
|
const 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);
|
|
iov[2] = (struct iovec){
|
|
.iov_base = fp_buf,
|
|
.iov_len = strlen(fp_buf)
|
|
};
|
|
} else {
|
|
iov[2] = (struct iovec){
|
|
.iov_base = nul,
|
|
.iov_len = 0
|
|
};
|
|
}
|
|
iov[3] = (struct iovec){
|
|
.iov_base = f->f_prevhost,
|
|
.iov_len = strlen(f->f_prevhost)
|
|
};
|
|
iov[4] = (struct iovec){
|
|
.iov_base = space,
|
|
.iov_len = 1
|
|
};
|
|
if (msg) {
|
|
wmsg = strdup(msg); /* XXX iov_base needs a `const' sibling. */
|
|
if (wmsg == NULL) {
|
|
logerror("strdup");
|
|
exit(1);
|
|
}
|
|
iov[5] = (struct iovec){
|
|
.iov_base = wmsg,
|
|
.iov_len = strlen(msg)
|
|
};
|
|
} else if (f->f_prevcount > 1) {
|
|
iov[5] = (struct iovec){
|
|
.iov_base = repbuf,
|
|
.iov_len = snprintf(repbuf, sizeof(repbuf),
|
|
"last message repeated %d times", f->f_prevcount)
|
|
};
|
|
} else {
|
|
iov[5] = (struct iovec){
|
|
.iov_base = f->f_prevline,
|
|
.iov_len = f->f_prevlen
|
|
};
|
|
}
|
|
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", f->fu_forw_hname);
|
|
switch (f->fu_forw_addr->ai_addr->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
dprintf(":%d\n",
|
|
ntohs(satosin(f->fu_forw_addr->ai_addr)->sin_port));
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
dprintf(":%d\n",
|
|
ntohs(satosin6(f->fu_forw_addr->ai_addr)->sin6_port));
|
|
break;
|
|
#endif
|
|
default:
|
|
dprintf("\n");
|
|
}
|
|
/* 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, (char *)iov[0].iov_base,
|
|
f->f_prevhost, (char *)iov[5].iov_base);
|
|
else
|
|
l = snprintf(line, sizeof line - 1, "<%d>%.15s %s",
|
|
f->f_prevpri, (char *)iov[0].iov_base,
|
|
(char *)iov[5].iov_base);
|
|
if (l < 0)
|
|
l = 0;
|
|
else if (l > MAXLINE)
|
|
l = MAXLINE;
|
|
|
|
for (r = f->fu_forw_addr; r; r = r->ai_next) {
|
|
struct socklist *sl;
|
|
|
|
STAILQ_FOREACH(sl, &shead, next) {
|
|
if (sl->sl_ss.ss_family == AF_LOCAL ||
|
|
sl->sl_ss.ss_family == AF_UNSPEC ||
|
|
sl->sl_socket < 0)
|
|
continue;
|
|
lsent = sendto(sl->sl_socket, line, l, 0,
|
|
r->ai_addr, r->ai_addrlen);
|
|
if (lsent == l)
|
|
break;
|
|
}
|
|
if (lsent == l && !send_to_all)
|
|
break;
|
|
}
|
|
dprintf("lsent/l: %d/%d\n", lsent, l);
|
|
if (lsent != l) {
|
|
int e = errno;
|
|
logerror("sendto");
|
|
errno = e;
|
|
switch (errno) {
|
|
case ENOBUFS:
|
|
case ENETDOWN:
|
|
case ENETUNREACH:
|
|
case EHOSTUNREACH:
|
|
case EHOSTDOWN:
|
|
case EADDRNOTAVAIL:
|
|
break;
|
|
/* case EBADF: */
|
|
/* case EACCES: */
|
|
/* case ENOTSOCK: */
|
|
/* case EFAULT: */
|
|
/* case EMSGSIZE: */
|
|
/* case EAGAIN: */
|
|
/* case ENOBUFS: */
|
|
/* case ECONNREFUSED: */
|
|
default:
|
|
dprintf("removing entry: errno=%d\n", e);
|
|
f->f_type = F_UNUSED;
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case F_FILE:
|
|
dprintf(" %s\n", f->fu_fname);
|
|
iov[6] = (struct iovec){
|
|
.iov_base = lf,
|
|
.iov_len = 1
|
|
};
|
|
if (writev(f->f_file, iov, nitems(iov)) < 0) {
|
|
/*
|
|
* If writev(2) fails for potentially transient errors
|
|
* like the filesystem being full, ignore it.
|
|
* Otherwise remove this logfile from the list.
|
|
*/
|
|
if (errno != ENOSPC) {
|
|
int e = errno;
|
|
close_filed(f);
|
|
errno = e;
|
|
logerror(f->fu_fname);
|
|
}
|
|
} else if ((flags & SYNC_FILE) && (f->f_flags & FFLAG_SYNC)) {
|
|
f->f_flags |= FFLAG_NEEDSYNC;
|
|
needdofsync = 1;
|
|
}
|
|
break;
|
|
|
|
case F_PIPE:
|
|
dprintf(" %s\n", f->fu_pipe_pname);
|
|
iov[6] = (struct iovec){
|
|
.iov_base = lf,
|
|
.iov_len = 1
|
|
};
|
|
if (f->fu_pipe_pid == 0) {
|
|
if ((f->f_file = p_open(f->fu_pipe_pname,
|
|
&f->fu_pipe_pid)) < 0) {
|
|
logerror(f->fu_pipe_pname);
|
|
break;
|
|
}
|
|
}
|
|
if (writev(f->f_file, iov, nitems(iov)) < 0) {
|
|
int e = errno;
|
|
|
|
deadq_enter(f->fu_pipe_pid, f->fu_pipe_pname);
|
|
close_filed(f);
|
|
errno = e;
|
|
logerror(f->fu_pipe_pname);
|
|
}
|
|
break;
|
|
|
|
case F_CONSOLE:
|
|
if (flags & IGN_CONS) {
|
|
dprintf(" (ignored)\n");
|
|
break;
|
|
}
|
|
/* FALLTHROUGH */
|
|
|
|
case F_TTY:
|
|
dprintf(" %s%s\n", _PATH_DEV, f->fu_fname);
|
|
iov[6] = (struct iovec){
|
|
.iov_base = crlf,
|
|
.iov_len = 2
|
|
};
|
|
errno = 0; /* ttymsg() only sometimes returns an errno */
|
|
if ((msgret = ttymsg(iov, nitems(iov), f->fu_fname, 10))) {
|
|
f->f_type = F_UNUSED;
|
|
logerror(msgret);
|
|
}
|
|
break;
|
|
|
|
case F_USERS:
|
|
case F_WALL:
|
|
dprintf("\n");
|
|
iov[6] = (struct iovec){
|
|
.iov_base = crlf,
|
|
.iov_len = 2
|
|
};
|
|
wallmsg(f, iov, nitems(iov));
|
|
break;
|
|
}
|
|
f->f_prevcount = 0;
|
|
free(wmsg);
|
|
}
|
|
|
|
/*
|
|
* WALLMSG -- Write a message to the world at large
|
|
*
|
|
* Write the specified message to either the entire
|
|
* world, or a list of approved users.
|
|
*/
|
|
static void
|
|
wallmsg(struct filed *f, struct iovec *iov, const int iovlen)
|
|
{
|
|
static int reenter; /* avoid calling ourselves */
|
|
struct utmpx *ut;
|
|
int i;
|
|
const char *p;
|
|
|
|
if (reenter++)
|
|
return;
|
|
setutxent();
|
|
/* NOSTRICT */
|
|
while ((ut = getutxent()) != NULL) {
|
|
if (ut->ut_type != USER_PROCESS)
|
|
continue;
|
|
if (f->f_type == F_WALL) {
|
|
if ((p = ttymsg(iov, iovlen, ut->ut_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->fu_uname[i][0])
|
|
break;
|
|
if (!strcmp(f->fu_uname[i], ut->ut_user)) {
|
|
if ((p = ttymsg_check(iov, iovlen, ut->ut_line,
|
|
TTYMSGTIME)) != NULL) {
|
|
errno = 0; /* already in msg */
|
|
logerror(p);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
endutxent();
|
|
reenter = 0;
|
|
}
|
|
|
|
/*
|
|
* Wrapper routine for ttymsg() that checks the terminal for messages enabled.
|
|
*/
|
|
static const char *
|
|
ttymsg_check(struct iovec *iov, int iovcnt, char *line, int tmout)
|
|
{
|
|
static char device[1024];
|
|
static char errbuf[1024];
|
|
struct stat sb;
|
|
|
|
(void) snprintf(device, sizeof(device), "%s%s", _PATH_DEV, line);
|
|
|
|
if (stat(device, &sb) < 0) {
|
|
(void) snprintf(errbuf, sizeof(errbuf),
|
|
"%s: %s", device, strerror(errno));
|
|
return (errbuf);
|
|
}
|
|
if ((sb.st_mode & S_IWGRP) == 0)
|
|
/* Messages disabled. */
|
|
return (NULL);
|
|
return ttymsg(iov, iovcnt, line, tmout);
|
|
}
|
|
|
|
static void
|
|
reapchild(int signo __unused)
|
|
{
|
|
int status;
|
|
pid_t pid;
|
|
struct filed *f;
|
|
|
|
while ((pid = wait3(&status, WNOHANG, (struct rusage *)NULL)) > 0) {
|
|
/* First, look if it's a process from the dead queue. */
|
|
if (deadq_removebypid(pid))
|
|
continue;
|
|
|
|
/* Now, look in list of active processes. */
|
|
STAILQ_FOREACH(f, &fhead, next) {
|
|
if (f->f_type == F_PIPE &&
|
|
f->fu_pipe_pid == pid) {
|
|
close_filed(f);
|
|
log_deadchild(pid, status, f->fu_pipe_pname);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
WantReapchild = 0;
|
|
}
|
|
|
|
/*
|
|
* Return a printable representation of a host address.
|
|
*/
|
|
static const char *
|
|
cvthname(struct sockaddr *f)
|
|
{
|
|
int error, hl;
|
|
static char hname[NI_MAXHOST], ip[NI_MAXHOST];
|
|
|
|
dprintf("cvthname(%d) len = %d\n", f->sa_family, f->sa_len);
|
|
error = getnameinfo(f, f->sa_len, ip, sizeof(ip), NULL, 0,
|
|
NI_NUMERICHOST);
|
|
if (error) {
|
|
dprintf("Malformed from address %s\n", gai_strerror(error));
|
|
return ("???");
|
|
}
|
|
dprintf("cvthname(%s)\n", ip);
|
|
|
|
if (!resolve)
|
|
return (ip);
|
|
|
|
error = getnameinfo(f, f->sa_len, hname, sizeof(hname),
|
|
NULL, 0, NI_NAMEREQD);
|
|
if (error) {
|
|
dprintf("Host name for your address (%s) unknown\n", ip);
|
|
return (ip);
|
|
}
|
|
hl = strlen(hname);
|
|
if (hl > 0 && hname[hl-1] == '.')
|
|
hname[--hl] = '\0';
|
|
trimdomain(hname, hl);
|
|
return (hname);
|
|
}
|
|
|
|
static void
|
|
dodie(int signo)
|
|
{
|
|
|
|
WantDie = signo;
|
|
}
|
|
|
|
static void
|
|
domark(int signo __unused)
|
|
{
|
|
|
|
MarkSet = 1;
|
|
}
|
|
|
|
/*
|
|
* Print syslogd errors some place.
|
|
*/
|
|
static void
|
|
logerror(const char *type)
|
|
{
|
|
char buf[512];
|
|
static int recursed = 0;
|
|
|
|
/* If there's an error while trying to log an error, give up. */
|
|
if (recursed)
|
|
return;
|
|
recursed++;
|
|
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);
|
|
recursed--;
|
|
}
|
|
|
|
static void
|
|
die(int signo)
|
|
{
|
|
struct filed *f;
|
|
struct socklist *sl;
|
|
char buf[100];
|
|
|
|
STAILQ_FOREACH(f, &fhead, next) {
|
|
/* flush any pending output */
|
|
if (f->f_prevcount)
|
|
fprintlog(f, 0, (char *)NULL);
|
|
if (f->f_type == F_PIPE && f->fu_pipe_pid > 0)
|
|
close_filed(f);
|
|
}
|
|
if (signo) {
|
|
dprintf("syslogd: exiting on signal %d\n", signo);
|
|
(void)snprintf(buf, sizeof(buf), "exiting on signal %d", signo);
|
|
errno = 0;
|
|
logerror(buf);
|
|
}
|
|
STAILQ_FOREACH(sl, &shead, next) {
|
|
if (sl->sl_ss.ss_family == AF_LOCAL)
|
|
unlink(sl->sl_peer->pe_name);
|
|
}
|
|
pidfile_remove(pfh);
|
|
|
|
exit(1);
|
|
}
|
|
|
|
static int
|
|
configfiles(const struct dirent *dp)
|
|
{
|
|
const char *p;
|
|
size_t ext_len;
|
|
|
|
if (dp->d_name[0] == '.')
|
|
return (0);
|
|
|
|
ext_len = sizeof(include_ext) -1;
|
|
|
|
if (dp->d_namlen <= ext_len)
|
|
return (0);
|
|
|
|
p = &dp->d_name[dp->d_namlen - ext_len];
|
|
if (strcmp(p, include_ext) != 0)
|
|
return (0);
|
|
|
|
return (1);
|
|
}
|
|
|
|
static void
|
|
readconfigfile(FILE *cf, int allow_includes)
|
|
{
|
|
FILE *cf2;
|
|
struct filed *f;
|
|
struct dirent **ent;
|
|
char cline[LINE_MAX];
|
|
char host[MAXHOSTNAMELEN];
|
|
char prog[LINE_MAX];
|
|
char file[MAXPATHLEN];
|
|
char *p, *tmp;
|
|
int i, nents;
|
|
size_t include_len;
|
|
|
|
/*
|
|
* Foreach line in the conf table, open that file.
|
|
*/
|
|
include_len = sizeof(include_str) -1;
|
|
(void)strlcpy(host, "*", sizeof(host));
|
|
(void)strlcpy(prog, "*", sizeof(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 (allow_includes &&
|
|
strncmp(p, include_str, include_len) == 0 &&
|
|
isspace(p[include_len])) {
|
|
p += include_len;
|
|
while (isspace(*p))
|
|
p++;
|
|
tmp = p;
|
|
while (*tmp != '\0' && !isspace(*tmp))
|
|
tmp++;
|
|
*tmp = '\0';
|
|
dprintf("Trying to include files in '%s'\n", p);
|
|
nents = scandir(p, &ent, configfiles, alphasort);
|
|
if (nents == -1) {
|
|
dprintf("Unable to open '%s': %s\n", p,
|
|
strerror(errno));
|
|
continue;
|
|
}
|
|
for (i = 0; i < nents; i++) {
|
|
if (snprintf(file, sizeof(file), "%s/%s", p,
|
|
ent[i]->d_name) >= (int)sizeof(file)) {
|
|
dprintf("ignoring path too long: "
|
|
"'%s/%s'\n", p, ent[i]->d_name);
|
|
free(ent[i]);
|
|
continue;
|
|
}
|
|
free(ent[i]);
|
|
cf2 = fopen(file, "r");
|
|
if (cf2 == NULL)
|
|
continue;
|
|
dprintf("reading %s\n", file);
|
|
readconfigfile(cf2, 0);
|
|
fclose(cf2);
|
|
}
|
|
free(ent);
|
|
continue;
|
|
}
|
|
if (*p == '#') {
|
|
p++;
|
|
if (*p != '!' && *p != '+' && *p != '-')
|
|
continue;
|
|
}
|
|
if (*p == '+' || *p == '-') {
|
|
host[0] = *p++;
|
|
while (isspace(*p))
|
|
p++;
|
|
if ((!*p) || (*p == '*')) {
|
|
(void)strlcpy(host, "*", sizeof(host));
|
|
continue;
|
|
}
|
|
if (*p == '@')
|
|
p = LocalHostName;
|
|
for (i = 1; i < MAXHOSTNAMELEN - 1; i++) {
|
|
if (!isalnum(*p) && *p != '.' && *p != '-'
|
|
&& *p != ',' && *p != ':' && *p != '%')
|
|
break;
|
|
host[i] = *p++;
|
|
}
|
|
host[i] = '\0';
|
|
continue;
|
|
}
|
|
if (*p == '!') {
|
|
p++;
|
|
while (isspace(*p)) p++;
|
|
if ((!*p) || (*p == '*')) {
|
|
(void)strlcpy(prog, "*", sizeof(prog));
|
|
continue;
|
|
}
|
|
for (i = 0; i < LINE_MAX - 1; i++) {
|
|
if (!isprint(p[i]) || isspace(p[i]))
|
|
break;
|
|
prog[i] = p[i];
|
|
}
|
|
prog[i] = 0;
|
|
continue;
|
|
}
|
|
for (p = cline + 1; *p != '\0'; p++) {
|
|
if (*p != '#')
|
|
continue;
|
|
if (*(p - 1) == '\\') {
|
|
strcpy(p - 1, p);
|
|
p--;
|
|
continue;
|
|
}
|
|
*p = '\0';
|
|
break;
|
|
}
|
|
for (i = strlen(cline) - 1; i >= 0 && isspace(cline[i]); i--)
|
|
cline[i] = '\0';
|
|
f = cfline(cline, prog, host);
|
|
if (f != NULL)
|
|
addfile(f);
|
|
}
|
|
}
|
|
|
|
static void
|
|
sighandler(int signo)
|
|
{
|
|
|
|
/* Send an wake-up signal to the select() loop. */
|
|
write(sigpipe[1], &signo, sizeof(signo));
|
|
}
|
|
|
|
/*
|
|
* INIT -- Initialize syslogd from configuration table
|
|
*/
|
|
static void
|
|
init(int signo)
|
|
{
|
|
int i;
|
|
FILE *cf;
|
|
struct filed *f;
|
|
char *p;
|
|
char oldLocalHostName[MAXHOSTNAMELEN];
|
|
char hostMsg[2*MAXHOSTNAMELEN+40];
|
|
char bootfileMsg[LINE_MAX];
|
|
|
|
dprintf("init\n");
|
|
WantInitialize = 0;
|
|
|
|
/*
|
|
* Load hostname (may have changed).
|
|
*/
|
|
if (signo != 0)
|
|
(void)strlcpy(oldLocalHostName, LocalHostName,
|
|
sizeof(oldLocalHostName));
|
|
if (gethostname(LocalHostName, sizeof(LocalHostName)))
|
|
err(EX_OSERR, "gethostname() failed");
|
|
if ((p = strchr(LocalHostName, '.')) != NULL) {
|
|
*p++ = '\0';
|
|
LocalDomain = p;
|
|
} else {
|
|
LocalDomain = "";
|
|
}
|
|
|
|
/*
|
|
* Load / reload timezone data (in case it changed).
|
|
*
|
|
* Just calling tzset() again does not work, the timezone code
|
|
* caches the result. However, by setting the TZ variable, one
|
|
* can defeat the caching and have the timezone code really
|
|
* reload the timezone data. Respect any initial setting of
|
|
* TZ, in case the system is configured specially.
|
|
*/
|
|
dprintf("loading timezone data via tzset()\n");
|
|
if (getenv("TZ")) {
|
|
tzset();
|
|
} else {
|
|
setenv("TZ", ":/etc/localtime", 1);
|
|
tzset();
|
|
unsetenv("TZ");
|
|
}
|
|
|
|
/*
|
|
* Close all open log files.
|
|
*/
|
|
Initialized = 0;
|
|
STAILQ_FOREACH(f, &fhead, 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:
|
|
close_filed(f);
|
|
break;
|
|
case F_PIPE:
|
|
deadq_enter(f->fu_pipe_pid, f->fu_pipe_pname);
|
|
close_filed(f);
|
|
break;
|
|
}
|
|
}
|
|
while(!STAILQ_EMPTY(&fhead)) {
|
|
f = STAILQ_FIRST(&fhead);
|
|
STAILQ_REMOVE_HEAD(&fhead, next);
|
|
free(f->f_program);
|
|
free(f->f_host);
|
|
free(f);
|
|
}
|
|
|
|
/* open the configuration file */
|
|
if ((cf = fopen(ConfFile, "r")) == NULL) {
|
|
dprintf("cannot open %s\n", ConfFile);
|
|
f = cfline("*.ERR\t/dev/console", "*", "*");
|
|
if (f != NULL)
|
|
addfile(f);
|
|
f = cfline("*.PANIC\t*", "*", "*");
|
|
if (f != NULL)
|
|
addfile(f);
|
|
Initialized = 1;
|
|
|
|
return;
|
|
}
|
|
|
|
readconfigfile(cf, 1);
|
|
|
|
/* close the configuration file */
|
|
(void)fclose(cf);
|
|
|
|
Initialized = 1;
|
|
|
|
if (Debug) {
|
|
int port;
|
|
STAILQ_FOREACH(f, &fhead, 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->fu_fname);
|
|
break;
|
|
|
|
case F_CONSOLE:
|
|
case F_TTY:
|
|
printf("%s%s", _PATH_DEV, f->fu_fname);
|
|
break;
|
|
|
|
case F_FORW:
|
|
switch (f->fu_forw_addr->ai_addr->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
port = ntohs(satosin(f->fu_forw_addr->ai_addr)->sin_port);
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
port = ntohs(satosin6(f->fu_forw_addr->ai_addr)->sin6_port);
|
|
break;
|
|
#endif
|
|
default:
|
|
port = 0;
|
|
}
|
|
if (port != 514) {
|
|
printf("%s:%d",
|
|
f->fu_forw_hname, port);
|
|
} else {
|
|
printf("%s", f->fu_forw_hname);
|
|
}
|
|
break;
|
|
|
|
case F_PIPE:
|
|
printf("%s", f->fu_pipe_pname);
|
|
break;
|
|
|
|
case F_USERS:
|
|
for (i = 0; i < MAXUNAMES && *f->fu_uname[i]; i++)
|
|
printf("%s, ", f->fu_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");
|
|
/*
|
|
* Log a change in hostname, but only on a restart.
|
|
*/
|
|
if (signo != 0 && strcmp(oldLocalHostName, LocalHostName) != 0) {
|
|
(void)snprintf(hostMsg, sizeof(hostMsg),
|
|
"syslogd: hostname changed, \"%s\" to \"%s\"",
|
|
oldLocalHostName, LocalHostName);
|
|
logmsg(LOG_SYSLOG|LOG_INFO, hostMsg, LocalHostName, ADDDATE);
|
|
dprintf("%s\n", hostMsg);
|
|
}
|
|
/*
|
|
* Log the kernel boot file if we aren't going to use it as
|
|
* the prefix, and if this is *not* a restart.
|
|
*/
|
|
if (signo == 0 && !use_bootfile) {
|
|
(void)snprintf(bootfileMsg, sizeof(bootfileMsg),
|
|
"syslogd: kernel boot file is %s", bootfile);
|
|
logmsg(LOG_KERN|LOG_INFO, bootfileMsg, LocalHostName, ADDDATE);
|
|
dprintf("%s\n", bootfileMsg);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Crack a configuration file line
|
|
*/
|
|
static struct filed *
|
|
cfline(const char *line, const char *prog, const char *host)
|
|
{
|
|
struct filed *f;
|
|
struct addrinfo hints, *res;
|
|
int error, i, pri, syncfile;
|
|
const char *p, *q;
|
|
char *bp;
|
|
char buf[MAXLINE], ebuf[100];
|
|
|
|
dprintf("cfline(\"%s\", f, \"%s\", \"%s\")\n", line, prog, host);
|
|
|
|
f = calloc(1, sizeof(*f));
|
|
if (f == NULL) {
|
|
logerror("malloc");
|
|
exit(1);
|
|
}
|
|
errno = 0; /* keep strerror() stuff out of logerror messages */
|
|
|
|
for (i = 0; i <= LOG_NFACILITIES; i++)
|
|
f->f_pmask[i] = INTERNAL_NOPRI;
|
|
|
|
/* save hostname if any */
|
|
if (host && *host == '*')
|
|
host = NULL;
|
|
if (host) {
|
|
int hl;
|
|
|
|
f->f_host = strdup(host);
|
|
if (f->f_host == NULL) {
|
|
logerror("strdup");
|
|
exit(1);
|
|
}
|
|
hl = strlen(f->f_host);
|
|
if (hl > 0 && f->f_host[hl-1] == '.')
|
|
f->f_host[--hl] = '\0';
|
|
trimdomain(f->f_host, hl);
|
|
}
|
|
|
|
/* save program name if any */
|
|
if (prog && *prog == '*')
|
|
prog = NULL;
|
|
if (prog) {
|
|
f->f_program = strdup(prog);
|
|
if (f->f_program == NULL) {
|
|
logerror("strdup");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
/* scan through the list of selectors */
|
|
for (p = line; *p && *p != '\t' && *p != ' ';) {
|
|
int pri_done;
|
|
int pri_cmp;
|
|
int pri_invert;
|
|
|
|
/* 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;
|
|
pri_invert = 0;
|
|
if (*q == '!') {
|
|
pri_invert = 1;
|
|
q++;
|
|
}
|
|
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;
|
|
}
|
|
}
|
|
|
|
/* 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;
|
|
pri_cmp = PRI_LT | PRI_EQ | PRI_GT;
|
|
} else {
|
|
/* Ignore trailing spaces. */
|
|
for (i = strlen(buf) - 1; i >= 0 && buf[i] == ' '; i--)
|
|
buf[i] = '\0';
|
|
|
|
pri = decode(buf, prioritynames);
|
|
if (pri < 0) {
|
|
errno = 0;
|
|
(void)snprintf(ebuf, sizeof ebuf,
|
|
"unknown priority name \"%s\"", buf);
|
|
logerror(ebuf);
|
|
free(f);
|
|
return (NULL);
|
|
}
|
|
}
|
|
if (!pri_cmp)
|
|
pri_cmp = (UniquePriority)
|
|
? (PRI_EQ)
|
|
: (PRI_EQ | PRI_GT)
|
|
;
|
|
if (pri_invert)
|
|
pri_cmp ^= PRI_LT | PRI_EQ | PRI_GT;
|
|
|
|
/* 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) {
|
|
errno = 0;
|
|
(void)snprintf(ebuf, sizeof ebuf,
|
|
"unknown facility name \"%s\"",
|
|
buf);
|
|
logerror(ebuf);
|
|
free(f);
|
|
return (NULL);
|
|
}
|
|
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++;
|
|
|
|
if (*p == '-') {
|
|
syncfile = 0;
|
|
p++;
|
|
} else
|
|
syncfile = 1;
|
|
|
|
switch (*p) {
|
|
case '@':
|
|
{
|
|
char *tp;
|
|
char endkey = ':';
|
|
/*
|
|
* scan forward to see if there is a port defined.
|
|
* so we can't use strlcpy..
|
|
*/
|
|
i = sizeof(f->fu_forw_hname);
|
|
tp = f->fu_forw_hname;
|
|
p++;
|
|
|
|
/*
|
|
* an ipv6 address should start with a '[' in that case
|
|
* we should scan for a ']'
|
|
*/
|
|
if (*p == '[') {
|
|
p++;
|
|
endkey = ']';
|
|
}
|
|
while (*p && (*p != endkey) && (i-- > 0)) {
|
|
*tp++ = *p++;
|
|
}
|
|
if (endkey == ']' && *p == endkey)
|
|
p++;
|
|
*tp = '\0';
|
|
}
|
|
/* See if we copied a domain and have a port */
|
|
if (*p == ':')
|
|
p++;
|
|
else
|
|
p = NULL;
|
|
|
|
hints = (struct addrinfo){
|
|
.ai_family = family,
|
|
.ai_socktype = SOCK_DGRAM
|
|
};
|
|
error = getaddrinfo(f->fu_forw_hname,
|
|
p ? p : "syslog", &hints, &res);
|
|
if (error) {
|
|
logerror(gai_strerror(error));
|
|
break;
|
|
}
|
|
f->fu_forw_addr = res;
|
|
f->f_type = F_FORW;
|
|
break;
|
|
|
|
case '/':
|
|
if ((f->f_file = open(p, logflags, 0600)) < 0) {
|
|
f->f_type = F_UNUSED;
|
|
logerror(p);
|
|
break;
|
|
}
|
|
if (syncfile)
|
|
f->f_flags |= FFLAG_SYNC;
|
|
if (isatty(f->f_file)) {
|
|
if (strcmp(p, ctty) == 0)
|
|
f->f_type = F_CONSOLE;
|
|
else
|
|
f->f_type = F_TTY;
|
|
(void)strlcpy(f->fu_fname, p + sizeof(_PATH_DEV) - 1,
|
|
sizeof(f->fu_fname));
|
|
} else {
|
|
(void)strlcpy(f->fu_fname, p, sizeof(f->fu_fname));
|
|
f->f_type = F_FILE;
|
|
}
|
|
break;
|
|
|
|
case '|':
|
|
f->fu_pipe_pid = 0;
|
|
(void)strlcpy(f->fu_pipe_pname, p + 1,
|
|
sizeof(f->fu_pipe_pname));
|
|
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->fu_uname[i], p, MAXLOGNAME - 1);
|
|
if ((q - p) >= MAXLOGNAME)
|
|
f->fu_uname[i][MAXLOGNAME - 1] = '\0';
|
|
else
|
|
f->fu_uname[i][q - p] = '\0';
|
|
while (*q == ',' || *q == ' ')
|
|
q++;
|
|
p = q;
|
|
}
|
|
f->f_type = F_USERS;
|
|
break;
|
|
}
|
|
return (f);
|
|
}
|
|
|
|
|
|
/*
|
|
* Decode a symbolic name to a numeric value
|
|
*/
|
|
static int
|
|
decode(const char *name, const CODE *codetab)
|
|
{
|
|
const 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);
|
|
}
|
|
|
|
static void
|
|
markit(void)
|
|
{
|
|
struct filed *f;
|
|
struct deadq_entry *dq, *dq0;
|
|
|
|
now = time((time_t *)NULL);
|
|
MarkSeq += TIMERINTVL;
|
|
if (MarkSeq >= MarkInterval) {
|
|
logmsg(LOG_INFO, "-- MARK --",
|
|
LocalHostName, ADDDATE|MARK);
|
|
MarkSeq = 0;
|
|
}
|
|
|
|
STAILQ_FOREACH(f, &fhead, 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. */
|
|
TAILQ_FOREACH_SAFE(dq, &deadq_head, dq_entries, dq0) {
|
|
switch (dq->dq_timeout) {
|
|
case 0:
|
|
/* Already signalled once, try harder now. */
|
|
if (kill(dq->dq_pid, SIGKILL) != 0)
|
|
(void)deadq_remove(dq);
|
|
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(dq->dq_pid, SIGTERM) != 0)
|
|
(void)deadq_remove(dq);
|
|
else
|
|
dq->dq_timeout--;
|
|
break;
|
|
default:
|
|
dq->dq_timeout--;
|
|
}
|
|
}
|
|
MarkSet = 0;
|
|
(void)alarm(TIMERINTVL);
|
|
}
|
|
|
|
/*
|
|
* fork off and become a daemon, but wait for the child to come online
|
|
* before returning to the parent, or we get disk thrashing at boot etc.
|
|
* Set a timer so we don't hang forever if it wedges.
|
|
*/
|
|
static int
|
|
waitdaemon(int 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);
|
|
|
|
(void)chdir("/");
|
|
if ((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 > STDERR_FILENO)
|
|
(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.
|
|
*/
|
|
static void
|
|
timedout(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.
|
|
*/
|
|
static int
|
|
allowaddr(char *s)
|
|
{
|
|
#if defined(INET) || defined(INET6)
|
|
char *cp1, *cp2;
|
|
struct allowedpeer *ap;
|
|
struct servent *se;
|
|
int masklen = -1;
|
|
struct addrinfo hints, *res = NULL;
|
|
#ifdef INET
|
|
in_addr_t *addrp, *maskp;
|
|
#endif
|
|
#ifdef INET6
|
|
uint32_t *addr6p, *mask6p;
|
|
#endif
|
|
char ip[NI_MAXHOST];
|
|
|
|
ap = calloc(1, sizeof(*ap));
|
|
if (ap == NULL)
|
|
err(1, "malloc failed");
|
|
|
|
#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);
|
|
/* port not numeric */
|
|
if (*cp2 != '\0')
|
|
goto err;
|
|
}
|
|
} 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)
|
|
goto err;
|
|
}
|
|
#ifdef INET6
|
|
if (*s == '[') {
|
|
cp2 = s + strlen(s) - 1;
|
|
if (*cp2 == ']') {
|
|
++s;
|
|
*cp2 = '\0';
|
|
} else {
|
|
cp2 = NULL;
|
|
}
|
|
} else {
|
|
cp2 = NULL;
|
|
}
|
|
#endif
|
|
hints = (struct addrinfo){
|
|
.ai_family = PF_UNSPEC,
|
|
.ai_socktype = SOCK_DGRAM,
|
|
.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);
|
|
ap->a_mask = (struct sockaddr_storage){
|
|
.ss_family = res->ai_family,
|
|
.ss_len = res->ai_addrlen
|
|
};
|
|
switch (res->ai_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
maskp = &sstosin(&ap->a_mask)->sin_addr.s_addr;
|
|
addrp = &sstosin(&ap->a_addr)->sin_addr.s_addr;
|
|
if (masklen < 0) {
|
|
/* use default netmask */
|
|
if (IN_CLASSA(ntohl(*addrp)))
|
|
*maskp = htonl(IN_CLASSA_NET);
|
|
else if (IN_CLASSB(ntohl(*addrp)))
|
|
*maskp = htonl(IN_CLASSB_NET);
|
|
else
|
|
*maskp = htonl(IN_CLASSC_NET);
|
|
} else if (masklen == 0) {
|
|
*maskp = 0;
|
|
} else if (masklen <= 32) {
|
|
/* convert masklen to netmask */
|
|
*maskp = htonl(~((1 << (32 - masklen)) - 1));
|
|
} else {
|
|
goto err;
|
|
}
|
|
/* Lose any host bits in the network number. */
|
|
*addrp &= *maskp;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
if (masklen > 128)
|
|
goto err;
|
|
|
|
if (masklen < 0)
|
|
masklen = 128;
|
|
mask6p = (uint32_t *)&sstosin6(&ap->a_mask)->sin6_addr.s6_addr32[0];
|
|
addr6p = (uint32_t *)&sstosin6(&ap->a_addr)->sin6_addr.s6_addr32[0];
|
|
/* convert masklen to netmask */
|
|
while (masklen > 0) {
|
|
if (masklen < 32) {
|
|
*mask6p =
|
|
htonl(~(0xffffffff >> masklen));
|
|
*addr6p &= *mask6p;
|
|
break;
|
|
} else {
|
|
*mask6p++ = 0xffffffff;
|
|
addr6p++;
|
|
masklen -= 32;
|
|
}
|
|
}
|
|
break;
|
|
#endif
|
|
default:
|
|
goto err;
|
|
}
|
|
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
|
|
}
|
|
STAILQ_INSERT_TAIL(&aphead, ap, next);
|
|
|
|
if (Debug) {
|
|
printf("allowaddr: rule ");
|
|
if (ap->isnumeric) {
|
|
printf("numeric, ");
|
|
getnameinfo(sstosa(&ap->a_addr),
|
|
(sstosa(&ap->a_addr))->sa_len,
|
|
ip, sizeof ip, NULL, 0, NI_NUMERICHOST);
|
|
printf("addr = %s, ", ip);
|
|
getnameinfo(sstosa(&ap->a_mask),
|
|
(sstosa(&ap->a_mask))->sa_len,
|
|
ip, sizeof ip, NULL, 0, NI_NUMERICHOST);
|
|
printf("mask = %s; ", ip);
|
|
} else {
|
|
printf("domainname = %s; ", ap->a_name);
|
|
}
|
|
printf("port = %d\n", ap->port);
|
|
}
|
|
#endif
|
|
|
|
return (0);
|
|
err:
|
|
if (res != NULL)
|
|
freeaddrinfo(res);
|
|
free(ap);
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* Validate that the remote peer has permission to log to us.
|
|
*/
|
|
static int
|
|
validate(struct sockaddr *sa, const char *hname)
|
|
{
|
|
int i;
|
|
char name[NI_MAXHOST], ip[NI_MAXHOST], port[NI_MAXSERV];
|
|
struct allowedpeer *ap;
|
|
#ifdef INET
|
|
struct sockaddr_in *sin4, *a4p = NULL, *m4p = NULL;
|
|
#endif
|
|
#ifdef INET6
|
|
struct sockaddr_in6 *sin6, *a6p = NULL, *m6p = NULL;
|
|
#endif
|
|
struct addrinfo hints, *res;
|
|
u_short sport;
|
|
int num = 0;
|
|
|
|
STAILQ_FOREACH(ap, &aphead, next) {
|
|
num++;
|
|
}
|
|
dprintf("# of validation rule: %d\n", num);
|
|
if (num == 0)
|
|
/* traditional behaviour, allow everything */
|
|
return (1);
|
|
|
|
(void)strlcpy(name, hname, sizeof(name));
|
|
hints = (struct addrinfo){
|
|
.ai_family = PF_UNSPEC,
|
|
.ai_socktype = SOCK_DGRAM,
|
|
.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 | 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 */
|
|
i = 0;
|
|
STAILQ_FOREACH(ap, &aphead, next) {
|
|
i++;
|
|
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;
|
|
}
|
|
#ifdef INET
|
|
else if (ap->a_addr.ss_family == AF_INET) {
|
|
sin4 = satosin(sa);
|
|
a4p = satosin(&ap->a_addr);
|
|
m4p = satosin(&ap->a_mask);
|
|
if ((sin4->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;
|
|
}
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
else if (ap->a_addr.ss_family == AF_INET6) {
|
|
sin6 = satosin6(sa);
|
|
a6p = satosin6(&ap->a_addr);
|
|
m6p = satosin6(&ap->a_mask);
|
|
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;
|
|
}
|
|
if (IN6_ARE_MASKED_ADDR_EQUAL(&sin6->sin6_addr,
|
|
&a6p->sin6_addr, &m6p->sin6_addr) != 0) {
|
|
dprintf("rejected in rule %d due to IP mismatch.\n", i);
|
|
continue;
|
|
}
|
|
}
|
|
#endif
|
|
else
|
|
continue;
|
|
} else {
|
|
if (fnmatch(ap->a_name, name, FNM_NOESCAPE) ==
|
|
FNM_NOMATCH) {
|
|
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 *.
|
|
*/
|
|
static int
|
|
p_open(const char *prog, pid_t *rpid)
|
|
{
|
|
int pfd[2], nulldesc;
|
|
pid_t pid;
|
|
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);
|
|
|
|
switch ((pid = fork())) {
|
|
case -1:
|
|
close(nulldesc);
|
|
return (-1);
|
|
|
|
case 0:
|
|
(void)setsid(); /* Avoid catching SIGHUPs. */
|
|
argv[0] = strdup("sh");
|
|
argv[1] = strdup("-c");
|
|
argv[2] = strdup(prog);
|
|
argv[3] = NULL;
|
|
if (argv[0] == NULL || argv[1] == NULL || argv[2] == NULL) {
|
|
logerror("strdup");
|
|
exit(1);
|
|
}
|
|
|
|
alarm(0);
|
|
|
|
/* Restore signals marked as SIG_IGN. */
|
|
(void)signal(SIGINT, SIG_DFL);
|
|
(void)signal(SIGQUIT, SIG_DFL);
|
|
(void)signal(SIGPIPE, SIG_DFL);
|
|
|
|
dup2(pfd[0], STDIN_FILENO);
|
|
dup2(nulldesc, STDOUT_FILENO);
|
|
dup2(nulldesc, STDERR_FILENO);
|
|
closefrom(STDERR_FILENO + 1);
|
|
|
|
(void)execvp(_PATH_BSHELL, argv);
|
|
_exit(255);
|
|
}
|
|
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);
|
|
}
|
|
*rpid = pid;
|
|
return (pfd[1]);
|
|
}
|
|
|
|
static void
|
|
deadq_enter(pid_t pid, const char *name)
|
|
{
|
|
struct deadq_entry *dq;
|
|
int status;
|
|
|
|
if (pid == 0)
|
|
return;
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
dq = malloc(sizeof(*dq));
|
|
if (dq == NULL) {
|
|
logerror("malloc");
|
|
exit(1);
|
|
}
|
|
*dq = (struct deadq_entry){
|
|
.dq_pid = pid,
|
|
.dq_timeout = DQ_TIMO_INIT
|
|
};
|
|
TAILQ_INSERT_TAIL(&deadq_head, dq, dq_entries);
|
|
}
|
|
|
|
static int
|
|
deadq_remove(struct deadq_entry *dq)
|
|
{
|
|
if (dq != NULL) {
|
|
TAILQ_REMOVE(&deadq_head, dq, dq_entries);
|
|
free(dq);
|
|
return (1);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
deadq_removebypid(pid_t pid)
|
|
{
|
|
struct deadq_entry *dq;
|
|
|
|
TAILQ_FOREACH(dq, &deadq_head, dq_entries) {
|
|
if (dq->dq_pid == pid)
|
|
break;
|
|
}
|
|
return (deadq_remove(dq));
|
|
}
|
|
|
|
static void
|
|
log_deadchild(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);
|
|
}
|
|
|
|
static int
|
|
socksetup(struct peer *pe)
|
|
{
|
|
struct addrinfo hints, *res, *res0;
|
|
int error;
|
|
char *cp;
|
|
int (*sl_recv)(struct socklist *);
|
|
/*
|
|
* We have to handle this case for backwards compatibility:
|
|
* If there are two (or more) colons but no '[' and ']',
|
|
* assume this is an inet6 address without a service.
|
|
*/
|
|
if (pe->pe_name != NULL) {
|
|
#ifdef INET6
|
|
if (pe->pe_name[0] == '[' &&
|
|
(cp = strchr(pe->pe_name + 1, ']')) != NULL) {
|
|
pe->pe_name = &pe->pe_name[1];
|
|
*cp = '\0';
|
|
if (cp[1] == ':' && cp[2] != '\0')
|
|
pe->pe_serv = cp + 2;
|
|
} else {
|
|
#endif
|
|
cp = strchr(pe->pe_name, ':');
|
|
if (cp != NULL && strchr(cp + 1, ':') == NULL) {
|
|
*cp = '\0';
|
|
if (cp[1] != '\0')
|
|
pe->pe_serv = cp + 1;
|
|
if (cp == pe->pe_name)
|
|
pe->pe_name = NULL;
|
|
}
|
|
#ifdef INET6
|
|
}
|
|
#endif
|
|
}
|
|
hints = (struct addrinfo){
|
|
.ai_family = AF_UNSPEC,
|
|
.ai_socktype = SOCK_DGRAM,
|
|
.ai_flags = AI_PASSIVE
|
|
};
|
|
if (pe->pe_name != NULL)
|
|
dprintf("Trying peer: %s\n", pe->pe_name);
|
|
if (pe->pe_serv == NULL)
|
|
pe->pe_serv = "syslog";
|
|
error = getaddrinfo(pe->pe_name, pe->pe_serv, &hints, &res0);
|
|
if (error) {
|
|
char *msgbuf;
|
|
|
|
asprintf(&msgbuf, "getaddrinfo failed for %s%s: %s",
|
|
pe->pe_name == NULL ? "" : pe->pe_name, pe->pe_serv,
|
|
gai_strerror(error));
|
|
errno = 0;
|
|
if (msgbuf == NULL)
|
|
logerror(gai_strerror(error));
|
|
else
|
|
logerror(msgbuf);
|
|
free(msgbuf);
|
|
die(0);
|
|
}
|
|
for (res = res0; res != NULL; res = res->ai_next) {
|
|
int s;
|
|
|
|
if (res->ai_family != AF_LOCAL &&
|
|
SecureMode > 1) {
|
|
/* Only AF_LOCAL in secure mode. */
|
|
continue;
|
|
}
|
|
if (family != AF_UNSPEC &&
|
|
res->ai_family != AF_LOCAL && res->ai_family != family)
|
|
continue;
|
|
|
|
s = socket(res->ai_family, res->ai_socktype,
|
|
res->ai_protocol);
|
|
if (s < 0) {
|
|
logerror("socket");
|
|
error++;
|
|
continue;
|
|
}
|
|
#ifdef INET6
|
|
if (res->ai_family == AF_INET6) {
|
|
if (setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY,
|
|
&(int){1}, sizeof(int)) < 0) {
|
|
logerror("setsockopt(IPV6_V6ONLY)");
|
|
close(s);
|
|
error++;
|
|
continue;
|
|
}
|
|
}
|
|
#endif
|
|
if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
|
|
&(int){1}, sizeof(int)) < 0) {
|
|
logerror("setsockopt(SO_REUSEADDR)");
|
|
close(s);
|
|
error++;
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Bind INET and UNIX-domain sockets.
|
|
*
|
|
* A UNIX-domain socket is always bound to a pathname
|
|
* regardless of -N flag.
|
|
*
|
|
* For INET sockets, RFC 3164 recommends that client
|
|
* side message should come from the privileged syslogd port.
|
|
*
|
|
* If the system administrator chooses not to obey
|
|
* this, we can skip the bind() step so that the
|
|
* system will choose a port for us.
|
|
*/
|
|
if (res->ai_family == AF_LOCAL)
|
|
unlink(pe->pe_name);
|
|
if (res->ai_family == AF_LOCAL ||
|
|
NoBind == 0 || pe->pe_name != NULL) {
|
|
if (bind(s, res->ai_addr, res->ai_addrlen) < 0) {
|
|
logerror("bind");
|
|
close(s);
|
|
error++;
|
|
continue;
|
|
}
|
|
if (res->ai_family == AF_LOCAL ||
|
|
SecureMode == 0)
|
|
increase_rcvbuf(s);
|
|
}
|
|
if (res->ai_family == AF_LOCAL &&
|
|
chmod(pe->pe_name, pe->pe_mode) < 0) {
|
|
dprintf("chmod %s: %s\n", pe->pe_name,
|
|
strerror(errno));
|
|
close(s);
|
|
error++;
|
|
continue;
|
|
}
|
|
dprintf("new socket fd is %d\n", s);
|
|
if (res->ai_socktype != SOCK_DGRAM) {
|
|
listen(s, 5);
|
|
}
|
|
sl_recv = socklist_recv_sock;
|
|
#if defined(INET) || defined(INET6)
|
|
if (SecureMode && (res->ai_family == AF_INET ||
|
|
res->ai_family == AF_INET6)) {
|
|
dprintf("shutdown\n");
|
|
/* Forbid communication in secure mode. */
|
|
if (shutdown(s, SHUT_RD) < 0 &&
|
|
errno != ENOTCONN) {
|
|
logerror("shutdown");
|
|
if (!Debug)
|
|
die(0);
|
|
}
|
|
sl_recv = NULL;
|
|
} else
|
|
#endif
|
|
dprintf("listening on socket\n");
|
|
dprintf("sending on socket\n");
|
|
addsock(res->ai_addr, res->ai_addrlen,
|
|
&(struct socklist){
|
|
.sl_socket = s,
|
|
.sl_peer = pe,
|
|
.sl_recv = sl_recv
|
|
});
|
|
}
|
|
freeaddrinfo(res0);
|
|
|
|
return(error);
|
|
}
|
|
|
|
static void
|
|
increase_rcvbuf(int fd)
|
|
{
|
|
socklen_t len;
|
|
|
|
if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &len,
|
|
&(socklen_t){sizeof(len)}) == 0) {
|
|
if (len < RCVBUF_MINSIZE) {
|
|
len = RCVBUF_MINSIZE;
|
|
setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &len, sizeof(len));
|
|
}
|
|
}
|
|
}
|