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From: ZyX <zyx@np.by>
Reply-To: zyx@np.by
To: zsh-workers@zsh.org
Subject: Re: is variable with variable name possible?
Date: Tue, 5 Apr 2011 08:09:59 +0400
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Reply to message =C2=ABRe: is variable with variable name possible?=C2=BB,=
=20
sent 20:34:26 05 April 2011, Tuesday
by Mikael Magnusson:

> Pretty sure globsubst breaks your idea too, but fine,
>=20
> : ${(P)~~somevar::=3D$PWD}
>=20
> In fact, globsubst pretty much breaks every hook function i have :P.
`emulate -L zsh' at the top of each function and it will be unbreakable by =
such=20
options.

Original message:
> On 4 April 2011 18:28, Stephane Chazelas <stephane_chazelas@yahoo.fr> wro=
te:
> > 2011-04-04 16:25:01 +0200, Mikael Magnusson:
> >> On 4 April 2011 16:06, Stephane Chazelas <stephane_chazelas@yahoo.fr>=
=20
wrote:
> >> > 2011-04-04 15:48:32 +0200, J=C3=A9r=C3=A9mie Roquet:
> >> > [...]
> >> >=20
> >> >> 2011/4/4 zzapper <david@tvis.co.uk>:
> >> >> > somevar=3D$(pwd)
> >> >> >=20
> >> >> > but I want somevar to be a variable name
> >> >>=20
> >> >> $ eval "$somevar=3D$(pwd)"
> >> >=20
> >> > [...]
> >> >=20
> >> > No!
> >> >=20
> >> > eval "$somevar=3D\$(pwd)"
> >> > or
> >> > eval "$somevar=3D\$PWD"
> >> >=20
> >> >=20
> >> > Or think of what would happen if $PWD was "/tmp/x;rm -rf /home"
> >>=20
> >> How do you feel about this?
> >>=20
> >> : ${(P)somevar::=3D$PWD}
> >=20
> > [...]
> >=20
> > Try after
> >=20
> > sudo ln -s . '/*'
> > cd '/*/*/*/*/*'
> > setopt globsubst
> >=20
> > ;-)
> >=20
> > (if you're lucky, it won't crash your machine).
>=20
> Pretty sure globsubst breaks your idea too, but fine,
>=20
> : ${(P)~~somevar::=3D$PWD}
>=20
> In fact, globsubst pretty much breaks every hook function i have :P.

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