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Full Discussion: Regular expression help
Top Forums UNIX for Dummies Questions & Answers Regular expression help Post 302757955 by frodo61 on Friday 18th of January 2013 08:36:29 AM
Old 01-18-2013
Quote:
Originally Posted by radoulov
Your regular expression matches: zero or more occurrences of [0-9] followed by a literal dot ., followed by zero or more occurrences of [0-9].
The == / != operators in ksh don't support regular expressions, but only shell pattern matching.
As I already said, check if your ksh version supports the =~ operator (but I doubt, if it's really an x88 implementation).
You should also modify the pattern (if used as a regular expression) to restrict the matching (see the examples in the previous two posts).

If your shell doesn't support regular expressions, use grep, as balajesuri suggested (you may need to use > /dev/null
instead of -q with some grep implementations.
Thank you for explaining. If my shell doesnt support regular expressions why does some of the regular expression work in my code? The =~ didnt work by the way. I will try usng the grep example instead but how would I make a single dot optionally instead of mandatory, would it be \? after the dot?

Thanks
 

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Mail::SpamAssassin::Plugin::ReplaceTags(3)		User Contributed Perl Documentation		Mail::SpamAssassin::Plugin::ReplaceTags(3)

NAME
Mail::SpamAssassin::Plugin::ReplaceTags - tags for SpamAssassin rules The plugin allows rules to contain regular expression tags to be used in regular expression rules. The tags make it much easier to maintain complicated rules. Warning: This plugin relies on data structures specific to this version of SpamAssasin; it is not guaranteed to work with other versions of SpamAssassin. SYNOPSIS
loadplugin Mail::SpamAssassin::Plugin::ReplaceTags replace_start < replace_end > replace_tag A [a@] replace_tag G [gk] replace_tag I [il|!1y?xccxcdxcexcfxecxedxeexef] replace_tag R [r3] replace_tag V (?:[vu]|\/) replace_tag SP [s~_-] body VIAGRA_OBFU /(?!viagra)<V>+<SP>*<I>+<SP>*<A>+<SP>*<G>+<SP>*<R>+<SP>*<A>+/i describe VIAGRA_OBFU Attempt to obfuscate "viagra" replace_rules VIAGRA_OBFU RULE DEFINITIONS AND PRIVILEGED SETTINGS
replace_tag tagname expression Assign a valid regular expression to tagname. Note: It is not recommended to put quantifiers inside the tag, it's better to put them inside the rule itself for greater flexibility. replace_pre tagname expression Assign a valid regular expression to tagname. The expression will be placed before each tag that is replaced. replace_inter tagname expression Assign a valid regular expression to tagname. The expression will be placed between each two immediately adjacent tags that are replaced. replace_post tagname expression Assign a valid regular expression to tagname. The expression will be placed after each tag that is replaced. replace_rules list_of_tests Specify a list of symbolic test names (separated by whitespace) of tests which should be modified using replacement tags. Only simple regular expression body, header, uri, full, rawbody tests are supported. replace_start string replace_end string String(s) which indicate the start and end of a tag inside a rule. Only tags enclosed by the start and end strings are found and replaced. perl v5.16.3 2011-06-06 Mail::SpamAssassin::Plugin::ReplaceTags(3)
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