Re: Shell (bash, (pd)ksh, zsh, /not/ ash) + exec + here-doc +redirect == trouble!

[Igor Peshansky <pechtcha at cs dot nyu dot edu>]

On Wed, 25 Jan 2006, Bas van Gompel wrote:

> Hi,
>
> Try the following script:
>
> === begin testexec.sh ===
> #!/bin/ksh
> exec 5<&0 /bin/ksh <<EOSH
> echo "First exec: Done."
> exec 0<&5
> echo "Second exec: Done."
> exit 0
> EOSH
> ==== end testexec.sh ====

You might want to quote <<'EOSH', but that's not the cause of your
problem.  Here's a funny thing:

#!/bin/bash
exec 5<&0 /bin/bash <<'EOSH'
echo "First exec: Done."
cat
exec 0<&5
echo "Second exec: Done."
exit 0
EOSH

works for me.  Don't ask me why, though.  Perhaps Eric will chime in.

> Has anybody got a clue?
>
> Is this cygwin-specific?

That's easy to check.  It isn't.  I get the same behavior with bash-3.0 on
Linux.

> Are all these shells borrowing code from each other?

Most definitely not.
	Igor
-- 
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