UNIX pipe bug

[David Taylor]

idall at augean.ua.OZ.AU (Ian Dall) writes:

>mknod PIPE1 p
>cat ~/.login | tee PIPE1 | wc | cat - PIPE1

>Should work. My .login is around 600 bytes. It does work on a vanilla
>system V.2.2 box I have, but it doesn't work on a Sun4 running SunOs 4.

Shouldn't work ... classic deadlock situation.

cat can't start reading PIPE1 until it has finished reading standard
input which cn't occur until wc finishes, which can't occur until tee
finished, which can't occur until someone (cat) is willing to read PIPE1.
--

.. Dave T.