How can I escape a string literal easily for use as a regex with grep? e.g.,
Say I wanted to implement a procmail killfile, that might, say contain a
mail subject line (dropped in with a mutt macro) like this:
Re: OT: Politics [Was:Social Contract]
(Hypothetical situation, of course...)
Then in my procmail.rc file I could do this:
# subject kill file
SUBJECT=`formail -zxSubject:`
:0:
* ? grep -i "$SUBJECT" $HOME/.mutt.killfile
/dev/null
This doesn't work, since $SUBJECT will contain a '[' and a ']' and these
are special.
What's the best way to be able to do something like this:
REGEXSAFESUBJECT=`$HOME/bin/regex_escape_string $SUBJECT`
cheers
dc
--
David Purton
[EMAIL PROTECTED]
For the eyes of the LORD range throughout the earth to
strengthen those whose hearts are fully committed to him.
2 Chronicles 16:9a
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