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Topic: Filter (Unix)

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	Filter (Unix) - Wikipedia, the free encyclopedia
		In UNIX and UNIX-like operating systems, a filter is program that gets most of its data from standard input (the main input stream) and writes its main results to standard output (the main output stream).
		UNIX filters are often used as elements of pipelines.
		The classic filter would be grep, which at it simplest prints to its output any lines containing a character string.
	en.wikipedia.org /wiki/Filter_(Unix) (199 words)

	Postfix After-Queue Content Filter
		The after-queue content filter is not to be confused with the approach that is described in the SMTPD_PROXY_README document, where incoming SMTP mail is filtered BEFORE it is stored into the Postfix queue.
		The simple content filter method is not suitable for content filter actions that are invoked via header_checks or body_checks patterns.
		The content filter request records are added by the smtpd(8) and pickup(8) servers (and qmqpd(8) if you decide to enable this service).
	www.postfix.com /FILTER_README.html (2889 words)

	[No title]
		Since renattach is a standard UNIX filter, it can be installed into a wide variety of mailing systems.
		The filter reads a single email message as input at stdin, then writes the filtered output either to stdout or to a pipe (external command) if the --pipe option is used.
		filter unix - n n - - pipe flags=q user=filter argv=renattach -l -p sendmail -i -f ${sender} -- ${recipient} The pipe option must be the last option specified, with everything after it being taken as the command and arguments.
	www.pc-tools.net /unix/renattach/INSTALL (1129 words)

	Statistical Spam Filter Review
		The spam filter is not Bayesian, but seems to have similar results to other probability based spam filters I have seen reviewed, and similar strengths and weaknesses.
		The whitelist improves overall performance of the filter as it is several magnitudes of 10 times faster compared to the rest of the filtering script.
		In my filter script most of the computing time is spent loading the associative array with tens of thousands of tokens and spaminess values.
	www.tc.umn.edu /~hause011/article/Spam_review.html (1295 words)

	HWG Filtering FAQ - The HTML Writers Guild (Site not responding. Last check: 2007-10-11)
		If filtering is not an option, you may wish to consider obtaining a more sophisticated email program, or subscribing to a digest version of the mailing lists.
		Although you cannot explicitly filter based on "sender", there is an option to sort based on "any header" which I have successfully used with other mailing lists.
		Sorting or filtering digests by To:, From:, or Subject: will group together your HWG messages, if you are unable to filter by "Sender:".
	www.hwg.org /resources/faqs/filterFAQ.html (2220 words)

	Dr. Dobb's \| A Print Filter for UNIX \| July 22, 2001
		The filter resides in any convenient directory (we used /etc), has global execute permissions, and is invoked in the printer's /etc/printcap entry.
		The difference is that an input filter is started afresh for every file sent to the printer, while an output filter is started only once for a whole series of jobs and cannot handle the individual jobs separately.
		Unlike ordinary filters, print filters are allowed to lseek() (reposition) their input files under some flavors of UNIX; this raises the possibility of a two-pass filter.
	www.ddj.com /184409311?pgno=3 (1856 words)

	UNIX pipes as IO monads
		UNIX pipes (treated semantically as writing to temporary files) are quite similar to monads.
		Incidentally, a UNIX filter is expected to sequentially consume its input and produce a single output stream.
		Therefore, from the point of view of the shell and filters, the input and the output streams are 'linear', singularly referenced objects.
	okmij.org /ftp/Computation/monadic-shell.html (764 words)

	mod_ext_filter - Apache HTTP Server
		In the event that the filter doesn't modify the length, this keyword should be specified.
		This parameter specifies the numeric value for filter type that the filter should be registered as.
		If the filter needs to operate at a different point in the filter chain than resource filters, then this parameter will be necessary.
	httpd.apache.org /docs/2.0/mod/mod_ext_filter.html (828 words)

	Fighting malware and spam with Postfix \| Advosys Consulting
		However, if you require unique settings for each user, it may be better to filter mail via a mail delivery agent such as maildrop instead of using the method shown here.
		SpamAssassin (http://spamassassin.apache.org/) is a mail filter that attempts to identify junk e-mail ("spam").
		A collection of alternative filter scripts, including one that can sideline or delete spam based on "score" is available at http://advosys.ca/papers/filter-misc/.
	advosys.ca /papers/postfix-filtering.html (2688 words)

	Free Unix Shell Statistical Spam Filter and Whitelist
		As a spam detector I am not as good a filter as you might think, just the subject and address is not always enough, I would occasionally open a spam to my great annoyance.
		And it is. I slapped one together as a ksh and awk script for use as a personal filter on a Unix type system.
		If the address is not found it is passed to the statistical spam filter, the tokens are checked and the email is given a spaminess value.
	www.tc.umn.edu /~hause011/article/Statistical_spam_filter.html (2158 words)

	IP Filter - TCP/IP Firewall/NAT Software
		To use, it can either be used as a loadable kernel module or incorporated into your UNIX kernel; use as a loadable kernel module where possible is highly recommended.
		To see an overview of how IP Filter fits into the overall picture of TCP/IP with your kernel and the order in which the various phases of packet processing is done, click here.
		The mailing list for IP Filter is now archived at: http://marc.theaimsgroup.com/?l=ipfilter This site also supports searching of the IP Filter list archive.
	coombs.anu.edu.au /~avalon/ip-filter.html (754 words)

	Email Filter
		By setting flags in the parameter file the mail filter may be run in debug mode, in which case it will generate a detailed execution trace.
		The mail filter is designed for my wife and I. To avoid any danger of virus infection, we only read email on the Linux system that hosts bearcave.com.
		The logic in the mail filter also tries to recognize whether an email is valid or SPAM by parsing the header, avoiding the more more time consuming processing of the email body.
	www.bearcave.com /software/mail_filter (3874 words)

	Unix Procmail Configuration
		A general knowledge of Unix systems and commands is a necessary prequisite for this guide.
		In Procmail, regular expressions are used in the conditions of a recipe to, for example, look for a pattern in the Subject header of a message.
		Unix tools such as grep more, or less.
	www1.umn.edu /adcs/help/email/UnixProcmail.html (1636 words)

	Experience Making a Filter Service for Cocoa
		The ADC documentation that I located for filter services talks about them in reference to converting clipboards from one data format to another.
		Since filters are just a special species of system service, they're stored in the same kind of bundle as a regular system service.
		This is the method in the filter's service provider object that's supposed to be invoked to convert the data.
	www.fugue.com /geekfiles/cocoa-filter.html (1688 words)

	xfilter-1.0(1) (Site not responding. Last check: 2007-10-11)
		It uses the specified input and output devices/locations as analogs to standard input and standard output files in a command line execution of the filter.
		If no filter is specified, pressing the "Filter" button simply copies the input to the output.
		For example, setting "Input:" to "Primary selection", "Output:" to "Text window", and "Filter:" to "spell", will apply spell(1) to the selected text, reporting questionable word spellings in the scrollable text window.
	hpux.cs.utah.edu /hppd/hpux/X11/Desktop/xfilter-1.0/man.html (115 words)

	ACIS Background Files - CIAO 3.4
		The script can be given an event file with a Data Model filter - such as a spatial filter - to restrict attention to just those chips covered by the filter.
		It is therefore important that you filter your dataset to remove periods of background flares.
		The background fields were filtered using a maximum rate that is 20 percent higher than the quiescent background level.
	cxc.harvard.edu /ciao/threads/acisbackground (3612 words)

	Setting up a Unix lpr filter for Ghostscript
		The two shell scripts described by this document are designed to make this task a little easier.
		" filter, but a commented-out list shows other filters which may be available.
		See the Aladdin Free Public License (the "License") for full details of the terms of using, copying, modifying, and redistributing Aladdin Ghostscript.
	www.cs.wisc.edu /~ghost/doc/AFPL/6.01/Unix-lpr.htm (764 words)

	[No title] (Site not responding. Last check: 2007-10-11)
		(A message can be anything.) A }{\b filter}{ is a process, thread, or other component that perpetually reads messages from an in pipe, processes the messages, then writes the results to an out pipe.
		A function pointer passed to the filter constructor specifies how data is to be processed.
		In the data driven case a filter subscribes to its in pipe.
	www.mathcs.sjsu.edu /faculty/pearce/patterns/filters/filter2.doc (366 words)

	RabidFire spam filter for UNIX systems
		RabidFire is an E-Mail filter for UNIX systems programmed in Tcl and driven by a programmable set of rules.
		While the modifications to the filter itself, compared to the previous version (1.0), are relatively minor, I have decided to completely reorganize the standard (recommended) set of rules -- to reflect the shift in my approach to filtering spam.
		Besides filtering, the same filter program can be used to perform four other functions identified by the name under which the program has been invoked.
	sheerness.cs.ualberta.ca /~pawel/RabidFire (13125 words)

	Spam Links - unix client side spam filters (Site not responding. Last check: 2007-10-11)
		Client side spam filters are used with your mail client rather than working on the mail server.
		They are useful if your ISP either cannot filter all of their spam or refuse to.
		Some client side filters will work with any mail client whereas others are built as plugins for a particular program.
	spamlinks.net /filter-client-unix.htm (168 words)

	Printing With UX Filter (UNIX/Linux)
		The UX filter is a utility software which converts files created by the UNIX workstation into a format which conforms to the PostScript language loaded in the printer.
		Delete all the directories that contain the UX filters and the files in these directories created during the installation.
		To print from Solaris, specify the printer registered during the installation of filters as the output destination.
	www.csudh.edu /CLASS/voffice/dell3100printer/Contents/section25.html (3728 words)

	De-Sircam-ify - Sircam mail filter for Unix (Site not responding. Last check: 2007-10-11)
		De-Sircam-ify is a utility I developed when I had trouble finding a commercial mail filter for the Windows trojan/worm called Sircam and was tired of being inundated by the annoying messages.
		While I am primarily a Unix user and not worried about my own infection, I am personally sick of deleting over 40 messages a day.
		I have also gone great lengths to make it compatible to various other residents of.forward files including forwarding addresses, vacation, and various other filters and sorting programs.
	www.math.psu.edu /desircamify (647 words)

	IP Filter - TCP/IP Firewall/NAT Software (Site not responding. Last check: 2007-10-11)
		Thanks to those who have been able to support IP Filter through donations of hardware.
		The current implementation provides a small set of tools, which can easily be used and integrated with regular unix shells and tools.
		The mailing list for IP Filter is now archived at: http://false.net/ipfilter/.
	ftyczka.org /ipf (720 words)

	Managing UNIX-to-NetWare Printing
		To authorize the UNIX host to send a print job to NetWare queue, include an entry in the /etc/printcap file that associates a UNIX print queue with the NetWare server and an exported NetWare print queue.
		Although most UNIX systems use the printcap file to define printer entries, some implementations of UNIX use a different file.
		Use this procedure to enable UNIX users to print to a queue located on a remote NetWare 4 server in the same NDS tree.
	www.novell.com /documentation/nw42/unixpenu/data/h887hk0t.html (2972 words)

	Filter - Wikipedia, the free encyclopedia
		In mathematics, a certain kind of subset of a partially ordered set.
		Filter (television), a show on the G4 channel:
		Filter feeder, an animal that strains food particles from water
	en.wikipedia.org /wiki/Filter (152 words)

	renattach for UNIX
		renattach is a fast and efficient UNIX stream filter that can rename or delete potentially dangerous e-mail attachments.
		The filter is invoked as a simple pipe for use in a wide variety of systems.
		The program's operation is simple: a single mail message is read from stdin, filtered, then written to stdout (or piped to an external command).
	www.pc-tools.net /unix/renattach (339 words)

	Managing Group Information Using NFSADMIN
		Depending on the filter selected, the user names matching the filter condition are listed in the Mapped Users table as well under the Unmapped Users table.
		You must also create the groups on the UNIX system unless you are using the NetWare NIS server to manage your UNIX machines and the groups already exist.
		To unmap a group, select the names of the NetWare and UNIX groups that are to be unmapped from the Mapped Groups table and click Unmap.
	www.novell.com /documentation/nfs24/nfs24enu/data/hq0jbkws.html (1208 words)

	PSU CSE \| UNIX Filter (Site not responding. Last check: 2007-10-11)
		Because the UNIX filter program can only filter based on a select few headers, you'll have to filter based on the subject.
		This file is used to configure UNIX filter and lives in your home directory.
		You'll need to create this file with the proper permissions and contents for elm filter to properly deliver your mail.
	www.cse.psu.edu /support/docs/spam/filter.php (134 words)

	The SpamBouncer: a Procmail-Based Spam Filter
		The SpamBouncer is a spam filter that runs under
		It filters and classifies your incoming email, moving spam to a separate folder or deleting it entirely.
		This allows you to find your real email without having to read through a flood of spam first.
	www.spambouncer.org (217 words)

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