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awkoperatorscase-insensitive

awk case insensitive and boolean operator

I would like to grep lines that contains both patterns in any order and I'm using 

awk '/pattern1/ && /pattern2/' file.txt

but if I want to do case insensitive search, adding /i works only if I add it to pattern2.

awk '/pattern1/ && /pattern2/i' file.txt ...works

awk '/pattern1/i && /pattern2/i' file.txt ...don't, outputs the whole file

anyone know how to solve this?

Solution

  • Try:

    awk '{s=tolower($0)} s~/lowercase_pattern1/ && s~/lowercase_pattern2/' file

    There is also the possibility of the IGNORECASE option in GNU awk..

    You could also most of the time do something like this:

    grep -Ei 'pattern1.*pattern2|pattern2.*pattern1' file