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Re: PATCH: 'UID=42 whoami' proceeds despite error

X-seq: zsh-workers 40063
From: Peter Stephenson <p.stephenson@xxxxxxxxxxx>
To: zsh-workers@xxxxxxx
Subject: Re: PATCH: 'UID=42 whoami' proceeds despite error
Date: Fri, 02 Dec 2016 12:21:13 +0000
Cms-type: 201P
In-reply-to: <20161202120826.GA8535@fujitsu.shahaf.local2>
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References: <CGME20161202121138epcas2p21c55043b509df171e8241852d17d2f41@epcas2p2.samsung.com> <20161202120826.GA8535@fujitsu.shahaf.local2>

On Fri, 2 Dec 2016 12:08:26 +0000
Daniel Shahaf <d.s@xxxxxxxxxxxxxxxxxx> wrote:
> With current master, `UID=42 foo` will run 'foo' as the current UID, not
> as UID 42, if setuid() failed:
> 
> % UID=42 id -u; echo $?
> zsh: failed to change user ID: operation not permitted
> 1000
> 0
> % 
> 
> How about the following?

Yes, you'd certainly have thought doing it anyway with the wrong UID
wasn't what the user expected.

pws

References:
- PATCH: 'UID=42 whoami' proceeds despite error
  - From: Daniel Shahaf

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