Table of Contentsfilter - filter incoming messages before adding to mailbox filter [-q] [-v] [-l] [-o output] [-f rules-file]
filter [-n] [-f rules-file]
filter [-r] [-o output] [-f rules-file]
filter [-c] [-s] [-o output] [-f rules-file]
filter [-c] [-S] [-o output] [-f rules-file] Filter uses a set of selection rules to process incoming mail messages. The format for the rules, located in $HOME/.elm/filter-rules, is;
rule ::= if (expression) then action
where expression is:
expression ::= { not } condition expr2
expr2 ::= NULL | and condition expr2
condition ::= field relationship value
::= lines relop numvalue
or ::= always
These further break down as:
field ::= from | subject | to | lines | sender
relationship ::= = | !=
relop ::= = | != | < | > | <= | >=
value ::= any quoted string
numvalue ::= any integer value
Action can be any of:
delete
save foldername
savecopy foldername
execute command
executec command
forward address
leave
For further information about the rules language, please see The Elm Filter Guide.
The flags the filter program understands are;
- -c
- Clear logs. If this flag is used, the log files will be removed after being summarized by either "-s" or "-S" (see below).
- -f rules-file
- Get rules from specified file instead of default $HOME/.elm/filter-rules
- -l
- Log actions only. Do not log information about mailed messages.
- -n
- Not really. Output what would happen if given message from standard input, but don't actually do anything with it.
- -o file
- Redirect stdout messages to the specified file or device. Logging of filter actions is not affected. (This is added to more gracefully deal with changes in the file system (since sendmail is quite picky about modes of files being redirected into.))
- -q
- Quiet. Do not log filtering actions.
- -r
- Rules. List the rules currently being used.
- -s
- Summarize. List a summary of the message filtering log.
- -S
- This is the same as `-s' but includes message-by-message information additionally.
- -v
- Verbose. Give output on standard out for each message filtered. Useful to have redirected to ``/dev/console'' and such. (see -o too).
Elm Development Group $HOME/.elm/filter-rules Default rules file
$HOME/.elm/filterlog A log of what has been done
$HOME/.elm/filtersum A summary of what has been done
/etc/passwd Used to get users home directory The Elm Filter Guide
readmsg(1L), elm(1L), mail(1), mailx(1), sendmail(1,8) Not really smart about pattern matching. Syd Weinstein elm@DSI.COM (dsinc!elm) "Copyright 1988-1992 by The USENET Community Trust
Derived from Elm 2.0, " Copyright 1986, 1987 by Dave Taylor
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