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Re: pushd
- X-seq: zsh-workers 2249
- From: Zoltan Hidvegi <hzoli@xxxxxxxxxx>
- To: zefram@xxxxxxxxxxxxxxxxx (Zefram)
- Subject: Re: pushd
- Date: Thu, 17 Oct 1996 00:28:22 +0200 (MET DST)
- Cc: schaefer@xxxxxxx, zsh-workers@xxxxxxxxxxxxxxx
- In-reply-to: <5016.199610161810@xxxxxxxxxxxxxxxxxxxxxxx> from Zefram at "Oct 16, 96 07:10:53 pm"
> Oh, what was the reasoning behind requiring "(UID=123; foo)" where
> "UID=123 foo" used to work? I liked the exporting syntax.
It was the simplest way to handle special parameters. If you say
parameter=value command the given environment variable is always set to
value even if it is a special parameter or integer or anything. So now
UID=hzoli printenv UID says hzoli. In case of UID it may net be the
desired behaviour but in some other cases this makes things simpler. I
also liked the exporting syntax but I often tried to use that to a zsh
function or to a builtin which caused irreversibly lost privileges.
Offtopic but note that USERNAME is much more secure as it now executes
initgroups() as well similarily to su username (this is new, zsh-3.0.0 does
not do that).
A somewhat related question:
% ksh
$ readonly foo=foo
$ foo=bar printenv foo
ksh: foo: is read only
% zsh
% readonly foo=foo
% foo=bar printenv foo
bar
The current bash version behaves similarily but I talked to the bash
maintainer and he thinks that the ksh behaviour is the correct one and
bash-2.0 will now allow this. Similar question:
% ksh
$ typeset -i i=12
$ i=foo printenv i
0
Zsh prints foo here. That's why UID=798 command does not work.
Zoltan
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