Re: is variable with variable name possible?

Re: is variable with variable name possible?

[ZyX]

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Reply to message «Re: is variable with variable name possible?», 
sent 20:34:26 05 April 2011, Tuesday
by Mikael Magnusson:

> Pretty sure globsubst breaks your idea too, but fine,
> 
> : ${(P)~~somevar::=$PWD}
> 
> 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 
options.

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

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Re: is variable with variable name possible?

[ZyX]

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Reply to message «Re: is variable with variable name possible?», 
sent 20:34:26 05 April 2011, Tuesday
by Mikael Magnusson:

> Pretty sure globsubst breaks your idea too, but fine,
> 
> : ${(P)~~somevar::=$PWD}
> 
> 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 
options.

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

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