From: "Tim Van Holder" <tim DOT van DOT holder AT pandora DOT be>
To: <djgpp-workers AT delorie DOT com>
Subject: RE: FD 4 special for DJGPP (and Perl in particular)?
Date: Wed, 28 Feb 2001 19:39:43 +0100
Message-ID: <CAEGKOHJKAAFPKOCLHDIIECACBAA.tim.van.holder@pandora.be>
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Actually, it seems it's not just FD 4:

a simple loop creating foo.sh with different fd's (2 - 13)
yields:

trying FD 2
foo
trying FD 3
foo
trying FD 4
./foo.sh: redirection error: Bad file descriptor (EBADF)
foo
trying FD 5
foo
trying FD 6
foo
trying FD 7
./foo.sh: redirection error: Bad file descriptor (EBADF)
foo
trying FD 8
./foo.sh: redirection error: Bad file descriptor (EBADF)
foo
trying FD 9
./foo.sh: redirection error: Bad file descriptor (EBADF)
foo
trying FD 10
foo
trying FD 11
foo
trying FD 12
foo
trying FD 13
foo

So it would seem FD's 4, 7, 8 and 9 are 'reserved' by Perl.
Could it be due to some breakage involving handles that are
set as noinherit or close-on-exec?  Is rebuilding Perl using
CVS libc likely to change things?