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TheDcoder/file-subset-example.sh

Created June 30, 2022 12:18
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Check if file A is a subset of file B (file B contains contents of file A)
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file-subset-example.sh
# Example perl script to check if file A is a subset of file B (i.e. file A has any part of file B)
perl -Mautodie=open -e 'undef $/; open $f1, "<", shift; open $f2, "<", shift; exit !!(-1 == index <$f2>, <$f1>)' -- fileA fileB
# Credit: tirnanog on Libera.Chat
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