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From: Chet Ramey <chet@odin.INS.CWRU.Edu>
To: byron@netapp.com
Cc: rc@hawkwind.utcs.toronto.edu
Subject: Re: autoconfig
Date: Wed, 2 Apr 1997 11:32:03 -0500	[thread overview]
Message-ID: <9704021632.AA15443.SM@odin.INS.CWRU.Edu> (raw)
In-Reply-To: Message from byron@netapp.com of Tue, 1 Apr 1997 14:28:39 -0500 (id <9704011928.AA27920@netapp.com>)

> I am sorely tempted to remove named pipe support. It never worked
> properly. So something is needed to auto-sense the particular
> encoding for /dev/fd (systems encode this differently), which I
> doubt is supplied by GNU autoconf.

Here is the test from bash's aclocal.m4 (the `local extensions' to
autoconf).  It handles /dev/fd and Linux's whacky /proc/self/fd, and it
is easy enough to add more directory prefixes to the check.  The bash
code then checks whether a file in /dev/fd is specified and constructs
the pathname to use with DEV_FD_PREFIX.  The bash `test' code and the
code that builds filenames for use in process substitution both use
DEV_FD_PREFIX when HAVE_DEV_FD is defined.

[AC_MSG_CHECKING(whether /dev/fd is available)
[if test -d /dev/fd  && test -r /dev/fd/0; then
 elif test -d /proc/self/fd && test -r /proc/self/fd/0; then
if test $bash_cv_dev_fd = "standard"; then
  AC_DEFINE(DEV_FD_PREFIX, "/dev/fd/")
elif test $bash_cv_dev_fd = "whacky"; then
  AC_DEFINE(DEV_FD_PREFIX, "/proc/self/fd/")

``The lyf so short, the craft so long to lerne.'' - Chaucer

Chet Ramey, Case Western Reserve University	Internet: chet@po.CWRU.Edu

  parent reply	other threads:[~1997-04-02 23:58 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
1997-04-01 19:28 autoconfig Byron Rakitzis
1997-04-02  1:11 ` autoconfig Greg A. Woods
1997-04-02  8:32   ` autoconfig Stefan Dalibor
1997-04-02  2:20 ` autoconfig Scott Schwartz
1997-04-02 15:10   ` autoconfig Mark K. Gardner
1997-04-02  2:59 ` autoconfig David Luyer
1997-04-02 16:32 ` Chet Ramey [this message]
1997-04-01 23:52 autoconfig Alan Watson
1997-04-02  9:38 autoconfig Bengt Kleberg
1997-04-03  0:15 ` autoconfig Scott Merrilees
1997-04-03  3:14   ` autoconfig Warren Toomey
1997-04-02 17:30 autoconfig Rich Salz
1997-04-02 20:24 autoconfig Byron Rakitzis
1997-04-05 18:38 autoconfig Bengt Kleberg

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