Question

Hi folks

I have the problem that searching with a regular expression with braces does not work.

This could easily reproduced on the page http://twiki.org/cgi-bin/view/TWiki/WebSearchAdvanced and enter the query "Welcome to Twiki" then you select "Regular expression search". You get now 2 Results. http://twiki.org/cgi-bin/search/TWiki/?search=Welcome+to+Twiki&scope=text&order=topic&regex=on&limit=all.

If you now change the regular Expresion to "Welcome to.{0,3}Twiki" and select "Regular expression search". You get now 0 Results. http://twiki.org/cgi-bin/search/TWiki/?search=Welcome+to.%7B0%2C3%7DTwiki&scope=text&order=topic&regex=on&limit=all

This is wrong because the regular expressin "Welcome to.{0,3}Twiki" matches at least "Welcome to Twiki".

I think this is a bug.

Environment

-- FranzJoachimBraunbeck - 27 Nov 2006

Answer

If you answer a question - or someone answered one of your questions - please remember to edit the page and set the status to answered. The status selector is below the edit box.

TWiki regular expression search is based on the egrep utility. Some egrep versions do not support a .{0,3} search. Make sure to upgrade to GNU egrep 2.5.1 or later. (This needs to be done here on twiki.org as well.)

-- PeterThoeny - 27 Nov 2006