Hello all! Please help me with the following complex regexp which works in egrep:
egrep '\"http:\/\/ccc\.bbb\.com\/documents\/0000\/[0-9]{4}\/([^\.]+\.[a-z]{3})[^\"]*\"' my-file.html
But silently does not work in sed:
sed "s/\"http:\/\/ccc\.bbb\.com\/documents\/0000\/[0-9]{4}\/([^\.]+\.[a-z]{3})[^\"]*\"/aaa/g" my-file.html
or
sed 's/\"http:\/\/ccc\.bbb\.com\/documents\/0000\/[0-9]{4}\/([^\.]+\.[a-z]{3})[^\"]*\"/aaa/g' my-file.html
Just can't figure out what's wrong...
Try:
sed 's|"http://ccc\.bbb\.com/documents/0000/[0-9]\{4\}/[^.][^.]*\.[a-z]\{3\}[^"]*"|aaa|g' infile
It works!!! Thank you!
Could you give a sample of your input? (I adjusted my post, because you changed the name to ccc.bbb.com later BTW)
sed 's/"http:\/\/ccc\.bbb\.com\/documents\/0000\/[0-9][0-9][0-9][0-9]\/[^.][^.]*\.[a-z][a-z][a-z][^"]*"/aaa/g' my-file.html
tyler_durden
I suppose your problem are some unescaped grouping constructs:
Your regex:
"/\"http:\/\/ccc\.bbb\.com\/documents\/0000\/[0-9]{4}\/([^\.]+\.[a-z]{3})[^\"] \"/
probably correct:
"/\"http:\/\/ccc\.bbb\.com\/documents\/0000\/[0-9]\{4\}\/\([^\.]+\.[a-z]\{3\}\)[^\"] \"/
If you want to repeat the previous regex part several times you have to use "regex\{<n>\}", not "regex{<n>}" and grouping has to be done with "\(<regex>\)", not "(<regex>)".
Furthermore, the "+" is not part of POSIX regexps, but some (usually GNU/Linux-) utilities understand it as "one or more", similar to "" meaning "zero or more". I am not entirely sure how you meant it, but you would be probably better off making this clear by either escaping the "+" our using "<regex><regex>" instead of "<regex>+" if you want to match one or more instances of <regex>.
I hope this helps.
bakunin
Thank you all guys. You are really fast.
FWIW, the egrep could be shortened to:
grep '"http://ccc\.bbb\.com/documents/0000/[0-9]{4}/[^.]+\.[a-z]{3}[^"]*"'