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From:	"Buzz" <cygwin DOT buzz AT bavag DOT tmfweb DOT nl>
Subject:	Re: Shell (bash, (pd)ksh, zsh, /not/ ash) + exec + here-doc + redirect == trouble!
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[No need to Cc me.]

Op Wed, 25 Jan 2006 20:28:32 +0000 schreef Eric Blake
in <012520062028.10525.43D7DF6F0008E6E60000291D22007507840A050E040D0C079D0A<at>comcast.net>:

[Adding attrib to self:]
: Buzz:
: > I (now) understand what's happening. I think it's undesirable, though.
:
:  That's a relative viewpoint.  Personally, I like the fact that
:  the rules are consistent (process instructions one line at
:  a time; and apply pipelines first, then apply all redirections,
:  including here-docs, in left-to-right order), and that the
:  rules allow you to save stdin without having it be fd 0

Sure, but to have the shell redirect /it's own/ input instead of the
input of it's sub-commands is counter-intuitive _and_ counter-
productive IMO. I like to write things like:

  exec sh 5<&0 <<EOSH
  exec 0<&5
  vim "$0"
  echo -n 'Edit OK? (yes/gigo)'
  read a
  if test "\$a" = yes ; then
    "$0" "$@"
  fi
  exit 0
  EOSH

which is fine if sh == ash...

...but this is OT. I'll try find a more appropriate forum.


L8r,

Buzz.
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