Re: Named pipes

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#147

From: Tom Christiansen
Date: Mon, 27 Jul 1992 23:16

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From the keyboard of mycroft@hal.gnu.ai.mit.edu (Charles Hannum):
:
:In article <92033@bu.edu> tesco@bumetb.bu.edu (Dances With Babes) writes:
:>
:> mknod testpipe p
:> cat testpipe &
:> ls > testpipe
:> The "cat" process ends after the ls is sent to the screen.
:
:This is the way named pipes have worked since The Dawn of Time.  If you
:want to have multiple processes write to the pipe, you need the reader
:to reopen it.  In the shell, you could do something like this:
:
:(while :;do cat testpipe;done)&

Or have the writers all write to a common descriptor:

    ( wtr1; wtr2; wtr3 ) > testpipe

--tom
-- 
    Tom Christiansen      tchrist@convex.com      convex!tchrist

"The number of UNIX installations has grown to 10, with more expected."
    - _The UNIX Programmer's Manual_, Second Edition, June, 1972.

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Message-ID: <1992Jul27.231614.21414@news.eng.convex.com>

Path: arc1-ca.pugleaf.net!sparky!uunet!haven.umd.edu!darwin.sura.net!convex!convex!tchrist

References: <1992Jul26.165838.1278@news.eng.convex.com> <92033@bu.edu> <1992Jul27.221133.27847@mintaka.lcs.mit.edu>

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Newsgroups: comp.unix.programmer
Path: arc1-ca.pugleaf.net!sparky!uunet!haven.umd.edu!darwin.sura.net!convex!convex!tchrist
From: Tom Christiansen <tchrist@convex.COM>
Subject: Re: Named pipes
Message-ID: <1992Jul27.231614.21414@news.eng.convex.com>
Originator: tchrist@pixel.convex.com
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Reply-To: tchrist@convex.COM (Tom Christiansen)
Organization: CONVEX Realtime Development, Colorado Springs, CO
References: <1992Jul26.165838.1278@news.eng.convex.com> <92033@bu.edu> <1992Jul27.221133.27847@mintaka.lcs.mit.edu>
Date: Mon, 27 Jul 1992 23:16:14 GMT
X-Disclaimer: This message was written by a user at CONVEX Computer
              Corp. The opinions expressed are those of the user and
              not necessarily those of CONVEX.
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