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Subject: Re: zsh portable script
From: =?iso-8859-1?Q?Fran=E7ois_Revol?= <revol@free.fr>
In-Reply-To: <i249q3$jk3$1@dough.gmane.org>
Date: Tue, 20 Jul 2010 16:07:32 +0200
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References: <1007130241570.5546@smasher> <201007121737.21296.joke@seiken.de> <i249q3$jk3$1@dough.gmane.org>
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Le 20 juil. 2010 =E0 15:53, Thorsten Kampe a =E9crit :

> * Joke de Buhr (Mon, 12 Jul 2010 17:37:19 +0200)
>> On Monday 12 July 2010 16:46:22 Atom Smasher wrote:
>>> on freebsd, zsh installs as /usr/local/bin/zsh. on linux (and most
>>> other systems?) it installs as /usr/bin/zsh.
>>>=20
>>> what's the best way to make zsh script portable between linux and
>>> freebsd?
>>>=20
>>> i could start the script with:
>>> 	#!/usr/bin/env zsh
>>>=20
>>> or i could specify that the script be executed as:
>>> 	zsh script
>>>=20
>>> is there a better way?
>>=20
>> Using env doesn't solve the problem either. There is no guarantee the =
"env"=20
>> program is installed under /usr/bin/env.
>=20
> It does solve the problem that's why it's used in (shell) =
scripting[1].=20

No it does not.
BeOS never had any /usr.
Haiku doesn't either.

It's just used because people "saw" env being put there more often than =
python or perl of whatever, but it doesn't mean they looked to all =
possible places.
It has just more chances of working but it's not a guarantee.

> For Python for example it's the official way to specify the =
interpreter.=20

Being official doesn't mean it's correct or works.

> I don't think "Atom Smasher" need a "guarantee" - just a confirmation=20=

> that it does indeed work.

Again, it won't on Haiku and likely others.

Fran=E7ois.=