regex - Matching a sentence with grep -


i'm trying grep full sentence containing search term. i've tried

grep (^.|\.\s).*searchterm.*(\.\s|\n)

but it's not working , i'm not sure why.

to clarify: want stdout print full sentence of search term. using grep search through single text file.

as example, if file has

"foo blah. blah blah searchterm blah blah. foo bar."

i want stdout print blah blah searchterm blah blah

because normal grep uses bre in have write capturing groups \(...\) , alternation operator \| . ( or ) or | alone match it's corresponding literal ( , ), | chars.

grep '\(^.\|\.\s\).*searchterm.*\(\.\s\|\n\)'

or

grep '\(^.\|\.[[:space:]]\).*searchterm.*\(\.[[:space:]]\|\n\)'

or

enable -e or -p parameter.

grep -p '(^.|\.\s).*searchterm.*(\.\s|\n)'

-

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