grep sed awk match only regexp1 AND regexp2 AND regexp3 ..

[FedoEx]

I know how to do OR in awk

awk '/regexp1|regexp2|regexp3/{print}' filename

or sed

sed -n '/regexp1\|regexp2/\|regexp3/p' filename

and grep

grep "regex1\|regexp2" filename

mathes lines regex1 or regex2 or regexp3
How do I match lines containing only regexp1 AND regexp2 AND regexp3
Thanks.

 

[ZaSter]

Here is one example with awk:

$ awk '/book/ && /worm/ {print}' /usr/share/dict/words
book-worm
bookworm
bookworms

 

[FedoEx]

I've found partial solution for grep

$grep "page.*versions"  /usr/share/doc/bash/README 
$files are formatted manual pages.  The `.txt' versions are
---------------
$grep "versions*.page"  /usr/share/doc/bash/README    
$

will match only lines that contain regexp1 regexp2 in the order specified.

 

[PHV]

grep 'versions' /usr/share/doc/bash/README | grep 'page'

Hope This Helps, PH.
FAQ219-2884
FAQ181-2886

 

[FedoEx]

There's got to be a way with logical AND.

 

[feherke]

Hi

No. That is quite out of regular expressions purpose. They are for string manipulation not for complex logic.

Feherke.

http://rootshell.be/~feherke/

 

[FedoEx]

I see. I will use awk or piped greps.

 

[p5wizard]

You can still use grep with any order of the combined REs, but if you have more than two REs, that becomes a bit cumbersome...

[tt]grep -E "page.*versions|versions.*page" /usr/share/doc/bash/README[/tt]

Of course you could script a wrapper around grep to construct the combined RE string but still... I'd prefer awk for this problem.


HTH,

p5wizard

 

[SamBones]

[tt]egrep[/tt]" can do ORs.

egrep 'regex1|regex2|regex3' filename

 

[SamBones]

Oops! Ignore. I didn't fully read the post.

 

[bigoldbulldog]

Very doable with sed, but messy as a one-liner

E.g.

sed -n -e '/regexp1/{' -e '/regexp2/{' -e '/regexp3/p' -e '}' -e '}' filename

or

$ sed -n '
/regexp1/{
/regexp2/{
/regexp3/p
}
> }' filename

Cheers,
ND