BUILD INSTRUCTIONS
 
 A makefile was supplied with this which should have built the program. If it
 fails please let us know, and here are some hints for building on different
 platforms.
 
 Tested OK on Linux/x86 with gcc3.2.
 	cc -O3 -pedantic -Wuninitialized -Wall -pipe -mcpu=pentium -march=pentium -fomit-frame-pointer -ffast-math -finline-functions -funroll-loops clamav-milter.c -pthread -lmilter ../libclamav/.libs/libclamav.a ../clamd/cfgfile.o ../clamd/others.o
 
 Compiles OK on Linux/x86 with tcc 0.9.16, but fails to link errors with 'atexit'
 	tcc -g -b -lmilter -lpthread clamav-milter.c...
 
 Fails to compile on Linux/x86 with icc6.0 (complains about stdio.h...)
 	icc -O3 -tpp7 -xiMKW -ipo -parallel -i_dynamic -w2 clamav-milter.c...
 Fails to build on Linux/x86 with icc7.1 with -ipo (fails on libclamav.a - keeps saying run ranlib). Otherwise it builds and runs OK.
 	icc -O2 -tpp7 -xiMKW -parallel -i_dynamic -w2 -march=pentium4 -mcpu=pentium4 clamav-milter.c...
 
 Tested with Electric Fence 2.2.2
 
 Compiles OK on Linux/ppc (YDL2.3) with gcc2.95.4. Needs -lsmutil to link.
 	cc -O3 -pedantic -Wuninitialized -Wall -pipe -fomit-frame-pointer -ffast-math -finline-functions -funroll-loop -pthread -lmilter ../libclamav/.libs/libclamav.a ../clamd/cfgfile.o ../clamd/others.o -lsmutil

 I haven't tested it further on this platform yet.
 YDL3.0 should compile out of the box

 
 Sendmail on MacOS/X (10.1) is provided without a development package so this
 can't be run "out of the box"
 

 Solaris 8 doesn't have milter support so clamav-milter won't work unless you
 rebuild sendmail from source.

 
 FreeBSD4.7 use /usr/local/bin/gcc30. GCC3.0 is an optional extra on
 FreeBSD. It comes with getopt.h which is handy. To link you need
 -lgnugetopt
 	gcc30 -O3 -DCONFDIR=\"/usr/local/etc\" -I. -I.. -I../clamd -I../libclamav -pedantic -Wuninitialized -Wall -pipe -mcpu=pentium -march=pentium -fomit-frame-pointer -ffast-math -finline-functions -funroll-loops clamav-milter.c -pthread -lmilter ../libclamav/.libs/libclamav.a ../clamd/cfgfile.o ../clamd/others.o -lgnugetopt
 

 FreeBSD4.8: compiles out of the box with either gcc2.95 or gcc3

 
 OpenBSD3.4: the supplied sendmail does not come with Milter support.
 Do this *before* running configure (thanks for Per-Olov Sjöhol
 <peo_s@incedo.org> for these instructions).
 
 	echo WANT_LIBMILTER=1 > /etc/mk.conf
 	cd /usr/src/gnu/usr.sbin/sendmail
 	make depend
 	make
 	make install
 	kill -HUP `sed q /var/run/sendmail.pid`
 
 Then do this to make the milter headers available to clamav...
 (the libmilter.a file is already in the right place after the sendmail
 recompiles above)
 
 	cd /usr/include
 	ln -s ../src/gnu/usr.sbin/sendmail/include/libmilter libmilter

 Solaris 9 and FreeBSD5 have milter support in the supplied sendmail, but
 doesn't include libmilter so you can't develop milter applications on it.
 Go to sendmail.org, download the lastest sendmail, cd to libmilter and
 "make install" there.
 
 Needs -lresolv on Solaris
 

 INSTALLATION
 
 Install into /usr/local/sbin/clamav-milter, mode 744
 
 See http://www.nmt.edu/~wcolburn/sendmail-8.12.5/libmilter/docs/sample.html
 
 Installations for RedHat Linux and it's derivatives such as YellowDog:

 	Ensure that you have the sendmail-devel RPM installed

 	Add to /etc/mail/sendmail.mc:
 	INPUT_MAIL_FILTER(`clamav', `S=local:/var/run/clamav.sock, F=, T=S:4m;R:4m')dnl
 	define(`confINPUT_MAIL_FILTERS', `clamav')
 
 	Check entry in /usr/local/etc/clamav.conf of the form:
 	LocalSocket /var/run/clamd.sock
 	StreamSaveToDisk
 
 	If you already have a filter (such as spamassassin-milter from
 	http://savannah.nongnu.org/projects/spamass-milt) add it thus:
 	INPUT_MAIL_FILTER(`clamav', `S=local:/var/run/clamav.sock, F=, T=S:4m;R:4m')dnl
 	INPUT_MAIL_FILTER(`spamassassin', `S=local:/var/run/spamass.sock, F=, T=C:15m;S:4m;R:4m;E:10m')
 	define(`confINPUT_MAIL_FILTERS', `spamassassin,clamav')dnl
 
 You may find INPUT_MAIL_FILTERS is not needed on your machine, however it
 is recommended by the Sendmail documentation and I recommend going along
 with that.
 
 I suggest putting SpamAssassin first since you're more likely to get spam
 than a virus/worm sent to you.
 
 Add to /etc/sysconfig/clamav-milter
 	CLAMAV_FLAGS="--max-children=2 local:/var/run/clamav.sock"
 or if clamd is on a different machine
 	CLAMAV_FLAGS="--max-children=2 --server=192.168.1.9 local:/var/run/clamav.sock"
 
 You should have received a script to put into /etc/init.d with this software.
 

 run 'chown clamav /usr/local/sbin/clamav-milter; chmod 4700 /usr/local/sbin/clamav-milter
 

 CHANGE HISTORY
 
 Changes
 0.2:	4/3/03	clamfi_abort() now always calls pthread_mutex_unlock
 	5/3/03	Only send a bounce if -b is set
 		Version now uses -v not -V
 		--config-file couldn't be set by -c
 0.3	7/3/03	Enhanced the Solaris compile time comment
 		No need to save the return result of LogSyslog
 		Use LogVerbose
 0.4	9/3/03	Initialise dataSocket/cmdSocket correctly
 	10/3/03	Say why we don't connect() to clamd
 		Enhanced '-l' usage message
 0.5	18/3/03	Ported to FreeBSD 4.7
 		Source no longer in support, so remove one .. from
 		the build instructions
 		Corrected the use of strerror_r
 0.51	20/3/03	Mention StreamSaveToDisk in the installation
 		Added -s option which allows clamd to run on a
 		different machine from the milter
 0.52	20/3/03	-b flag now only stops the bounce, sends warning
 		to recipient and postmaster
 0.53	24/3/03	%d->%u in syslog call
 	27/3/03	tcpSocket is now of type in_port_t
 	27/3/03	Use PING/PONG
 0.54	23/5/03	Allow a range of IP addresses as outgoing ones
 		that need not be checked
 0.55	24/5/03	Use inet_ntop() instead of inet_ntoa()
 		Thanks to Krzysztof Olędzki <ole@ans.pl>
 0.60	11/7/03	Some TODOs done by Nigel Kukard <nkukard@lbsd.net>
 		Should stop a couple of remote chances of crashes

 0.60a	22/7/03	Tidied up message when sender is unknown
 0.60b	17/8/03	Optionally set postmaster address. Usually one uses
 		/etc/aliases, but not everyone want's to...
 0.60c	22/8/03	Another go at Solaris support
 0.60d	26/8/03	Removed superflous buffer and unneeded strerror call
 		ETIMEDOUT isn't an error, but should give a warning

 0.60e	09/9/03	Added -P and -q flags by "Nicholas M. Kirsch" <nick@kirsch.org>

 0.60f	17/9/03	Changed fprintf to fputs where possible
 		Redirect stdin from /dev/null, stdout&stderr to
 		/dev/console

 0.60g	26/9/03	Handle sendmail calling abort after calling cleanup
 		(Should never happen - but it does)
 		Added -noxheader patch from dirk.meyer@dinoex.sub.org

 0.60h	28/9/03	Support MaxThreads option in config file,
 		overriden by --max-children.
 		Patch from "Richard G. Roberto" <rgr@dedlegend.com>

 0.60i	30/9/03	clamfi_envfrom() now correctly returns SMFIS_TEMPFAIL,
 		in a few circumstances it used to return EX_TEMPFAIL
 		Patch from Matt Sullivan <matt@sullivan.gen.nz>

 0.60j	1/10/03	strerror_r doesn't work on Linux, attempting workaround
 		Added support for hard-coded list of email addresses
 		who's e-mail is not scanned

 0.60k	5/10/03	Only remove old UNIX domain socket if FixStaleSocket
 		is set

 0.60l	11/10/03 port is now unsigned
 		Removed remote possibility of crash if the target
 		e-mail address is very long
 		No longer calls clamdscan to get the version

 0.60m	12/10/03 Now does sanity check if using localSocket
 		Gets version info from clamd
 		Only reset fd's 0/1/2 if !ForeGround

 0.60n	22/10/03 Call pthread_cont_broadcast more often

 0.60o	31/10/03 Optionally accept all mails if scanning procedure
 		fails (Joe Talbott <josepht@cstone.net>)

 0.60p	5/11/03	Only call mutex_unlock when max_children is set
 		Tidy up the call to pthread_cond_timedwait

 0.60q	11/11/03 Fixed handling of % characters in e-mail addresses
 		pointed out by dotslash@snosoft.com

 0.65	15/11/03 Upissue of clamav
 0.65a	19/11/03 Close cmdSocket earlier
 		Added setpgrp()

 0.65b	22/11/03 Ensure milter is not run as root if requested
 		Added quarantine support

 0.65c	24/11/03 Support AllowSupplementaryGroups
 		Fix warning about root usage

 0.65d	25/11/03 Handle empty hostname or hostaddr
 		Fix based on a submission by Michael Dankov <misha@btrc.ru>

 0.65e	29/11/03 Fix problem of possible confused pointers if large
 		number of recipients given.
 		Fix by Michael Dankov <misha@btrc.ru>.

 0.65f	29/11/03 Added --quarantine-dir
 		Thanks to Michael Dankov <misha@btrc.ru>.

 0.65g	2/12/03	Use setsid if setpgrp is not present.
 		Thanks to Eugene Crosser <crosser@rol.ru>

 0.65h	4/12/03	Added call to umask to ensure that the local socket
 		is not publically writeable. If it is sendmail
 		will (correctly!) refuse to start this program
 		Thanks for Nicklaus Wicker <n.wicker@cnk-networks.de>
 		Don't sent From as the first line since that means
 		clamd will think it is an mbox and not handle
 		unescaped From at the start of lines properly
 		Thanks to Michael Dankov <misha@btrc.ru>

 0.65i	9/12/03	Use the location of sendmail discovered by configure

 0.65j	10/12/03 Timeout on waiting for data from clamd

 0.65k	12/12/03 A couple of calls to clamfi_cleanup were missing
 		before return cl_error

 0.66	13/12/03 Upissue

 0.66a	22/12/03 Added --sign

 0.66b	27/12/03 --sign moved to privdata

 0.66c	31/12/03 Included the sendmail queue ID in the log, from an
 		idea by Andy Fiddaman <af@jeamland.org>

 0.66d	10/1/04	Added OpenBSD instructions
 		Added --signature-file option

 0.66e	12/1/04	FixStaleSocket: no longer complain if asked to remove
 		an old socket when there was none to remove

 0.66f	24/1/04	-s: Allow clamd server name as well as IPaddress
 0.66g	25/1/04 Corrected usage message
 		Started to honour --debug
 		Dump core on LINUX if CL_DEBUG set
 		Support multiple servers separated by colons
 0.66h	26/1/04	Corrected endian problem (ntohs instead of htons)

 0.66i	28/1/04	Fixed compilation error with --enable-debug

 0.66j	29/1/03	Added --noreject flag, based on a patch by
 		"Vijay Sarvepalli" <vssarvep@office.uncg.edu>

 0.66k	2/2/04	When --postmaster-only is given, include the system
 		ID of the message in the warning e-mail, since that
 		will help the administrator when sifting through the
 		mail logs. Based on an idea by Jim Allen,
 		<Jim.Allen@Heartsine.co.uk>

 
 BUG REPORTS
 
 Please send bug reports and/or comments to Nigel Horne <njh@despammed.com>
 
 TODO
 
 There are several ideas marked as TODO in the source code. If anyone has
 any other suggestions please feel free to contact me.