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/proc/nnn/fd/nnn and bash

Subject: /proc/nnn/fd/nnn and bash
From: dan at Paragon.COM (Dan Demus)
Date: Thu, 31 Aug 1995 10:38:02 -0400
In-reply-to: <199508311356.AA23736@world.std.com> (worley@world.std.com)

Dale writes:

   Has anyone use the /proc/nnn/fd/mmm special files?  Apparently, when
   opened, they give a duplicate of file descriptor mmm of process nnn
   (if you have permission).  It seems like bash could use this to
   implement the >(...) and <(...) "process substitution" mechanism, but
   doesn't.

What it is really used for is to turn programs like cpio which aren`t
designed to be filters into filters.

Is process substitution just another PIPELINE notation?

		Dan.

Follow-Ups:
- /proc/nnn/fd/nnn and bash
  - From: worley at world.std.com (Dale R Worley)

References:
- /proc/nnn/fd/nnn and bash
  - From: worley at world.std.com (Dale R Worley)

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