Tail

[Kjeld Borch Egevang]

rich at eddie.MIT.EDU (Richard Caloggero) writes:



>     How is "tail -1f" implemented?  Is there an IOCTL or FCNTRL
>parameter which allows one to wait for some sort of status event (like
>size change), or does tail just keep checking and sleeping?

I've been told that in our SysV-implementation (3.1) there is a loop
with a read (from the file), a write (to the terminal) and a sleep(1).

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