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To: Clint Olsen <olsenc@ichips.intel.com>,
        zsh-workers@sunsite.auc.dk (Zsh hackers list)
Subject: Re: #!/path/to/arch-indep/zsh -f 
In-Reply-To: "Clint Olsen"'s message of "Tue, 21 Sep 1999 18:23:51 DFT."
             <19990921182350.A45626@ichips.intel.com> 
Date: Wed, 22 Sep 1999 09:59:25 +0200
From: Peter Stephenson <pws@ibmth.df.unipi.it>

Clint Olsen wrote:
> Hello:
> 
> FYI, I'm using zsh-3.1.6.
> 
> I decided to change my script to reflect the copy of my shell, and attempt
> to direct it to the path of my zsh wrapper itself causes the script to
> misfire when it is executed from *csh.  I've narrowed it down to a machine
> independent wrapper I have which seems to be hampering starting the
> interpreter.  It is:
> 
> #!/bin/sh
> 
> if [ -f $OTOOLS/bin/$OS/zsh ]; then
>   exec $OTOOLS/bin/$OS/zsh $*
> else
>   exec /usr/intel/bin/zsh $*
> fi

Well, a more specific test would be `[ -x $OTOOLS/bin/$OS/zsh ]', but if
the file's there, it's likely to be executable.  A more likely source of
problems, particularly if you are passing arguments with spaces in, in
which case it's a guaranteed source of problems, is our old friend the sh
word-splitting behaviour: for example, if you do
  zsh -c 'echo "hello there"'
the wrapper will actually in effect invoke
  zsh -c 'echo' '"hello' 'there"'
(which is bad).  To keep your arguments intact, try:

#!/bin/sh

if [ -x $OTOOLS/bin/$OS/zsh ]; then
  exec $OTOOLS/bin/$OS/zsh "$@"
else
  exec /usr/intel/bin/zsh "$@"
fi

-- 
Peter Stephenson <pws@ibmth.df.unipi.it>       Tel: +39 050 844536
WWW:  http://www.ifh.de/~pws/
Dipartimento di Fisica, Via Buonarroti 2, 56127 Pisa, Italy