Github user jfrazee commented on the pull request:
https://github.com/apache/nifi/pull/315#issuecomment-204017042
@arpitgupta Ok, yeah, older versions of coreutils don't have it. I was
doing this with `readlink` but BSD readlink doesn't have the same options as
GNU. Looks like it might be necessary to push this down into detectOS(), if
people want this sort of change at all.
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