From: Stephane Chazelas <stephane.chazelas@gmail.com>
To: Leah Neukirchen <leah@vuxu.org>
Cc: zsh-workers@zsh.org
Subject: Re: _sh doing _normal completion
Date: Wed, 28 Mar 2018 14:59:09 +0100 [thread overview]
Message-ID: <20180328135909.GA17923@chaz.gmail.com> (raw)
In-Reply-To: <87d0zoe2iv.fsf@gmail.com>
2018-03-28 15:46:32 +0200, Leah Neukirchen:
[...]
> The main problem is that it floods the reasonable expansions (from .)
> with the full contents of $PATH.
[...]
Some sh implementations (bash, zsh, AT&T ksh) look-up slash-less
commands in $PATH if not found in the currently directory, some
(mksh, dash, yash) don't. Both behaviours are allowed by POSIX.
ksh88 actually looked it up in $PATH *before* the current
directory, causing security vulnerabilities on systems with
support for setuid scripts for instance.
If you want to run a script in the current directory, I would
suggest you get used to typing:
sh ./myscr<Tab>
to avoid surprises on those systems that lookup scripts in
$PATH. The fact that zsh completes commands in $PATH when you do
sh myscr<Tab> is actually useful as a reminder that it's not a
wise thing to do.
--
Stephane
prev parent reply other threads:[~2018-03-28 13:59 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-27 13:34 Leah Neukirchen
2018-03-27 19:33 ` Peter Stephenson
2018-03-28 13:46 ` Leah Neukirchen
2018-03-28 13:59 ` Stephane Chazelas [this message]
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