On Monday 12 July 2010 17:35:34 Sebastian Stark wrote:
> Am 12.07.2010 um 16:46 schrieb Atom Smasher:
> > on freebsd, zsh installs as /usr/local/bin/zsh. on linux (and most other
> > systems?) it installs as /usr/bin/zsh.
> > 
> > what's the best way to make zsh script portable between linux and
> > freebsd?
> > 
> > i could start the script with:
> > 	#!/usr/bin/env zsh
> > 
> > or i could specify that the script be executed as:
> > 	zsh script
> > 
> > is there a better way?
> 
> /usr/bin/env is not as portable as one might think (see
> http://www.in-ulm.de/~mascheck/various/shebang/#env)
> 
> When I read this I was thinking about it a bit and came to this:
> 
> ------------------------------------------------
> #!/bin/sh
> 
> if test -z "$ZSH_VERSION"
> then
>         exec zsh <"$0"
> fi
> 
> print "I'm in zsh now!"
> ------------------------------------------------
> 
> Since the script is fed to /bin/sh via stdin it shouldn't be a problem if
> it contains zsh-specific syntax after the exec. I never used this
> construct and I'm not sure how portable it really is. Also I don't know if
> one can assume that /bin/sh understands ,exec' and ,<'.
> 
> 
> Sebastian

Sorry I wrote I the version with the "<" in the first place.

calling zsh this way doesn't pass invocation arguments. If that is not 
necessary everything should be find.

/bin/sh needs to be a bourne compatible shell and therefore must understand 
"exec" and "<"-redirection.