On 18/03/2025 20:49, Lawrence Velázquez via austin-group-l at The Open
Group wrote:
On Tue, Mar 18, 2025, at 8:55 AM, Geoff Clare via austin-group-l at The Open
Group wrote:
I disagree - as per my earlier email, quoted at the end of the bug
description, the standard says "one input file descriptor from another",
implying that they are two different file descriptors, so the behaviour
of 0<&0 is currently unspecified (implicitly).
Is the behavior of this rationale example unspecified as well?
Since the connection of the input to the equivalent of
/dev/null is considered to occur before redirections, the
following script would produce no output:
exec < /etc/passwd
cat <&0 &
wait
https://pubs.opengroup.org/onlinepubs/9799919799.2024edition/xrat/V4_xcu_chap01.html#tag_23_02_09_12
Huh. Thanks for finding that, I did completely missed it. At the very
least, that makes it rather explicit what the intent was, even if it
provides no reason for it.
Cheers,
Harald van Dijk
