On Jul 28, 2009, at 21:14 , Magicloud Magiclouds wrote:
(or_, ow_) - createPipe
or - fdToHandle or_
ow - fdToHandle ow_
hSetBuffering ow LineBuffering
hSetBuffering or LineBuffering
h - runProcess cmd [] Nothing Nothing Nothing (Just ow) Nothing
In the cmd process, the ow is not LineBuffering
Buffering is not an attribute of a filehandle, but of the I/O
library. There is no way for you to tell cmd how you want it to
buffer, unless it has an option to do so (cat -u, tcpdump -l, etc.),
although you can hint by using a pty instead of a pipe: many programs
will switch to line buffering in that case, some will go unbuffered;
usually, a pipe, FIFO, or ordinary file will be block buffered.
--
brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allb...@kf8nh.com
system administrator [openafs,heimdal,too many hats] allb...@ece.cmu.edu
electrical and computer engineering, carnegie mellon universityKF8NH
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