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why doesn't "tail -f" use select or poll?

From: Joshua Haberman
Subject: why doesn't "tail -f" use select or poll?
Date: Sun, 26 Mar 2006 09:34:18 -0800

Is there any reason why "tail -f" doesn't use select or poll, instead of sleep?

For the case where you are following a filename instead of an fd I realize this isn't possible. But for the more common case, where you *are* following a fd, select would make it so you immediately see any output, instead of having to wait for the next sleep interval. It would make the program a little nicer to use.

Maybe some systems don't have select or poll, but for the ones that do, it seems like a clear win.

What do you think?


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