bug#12632: file permissions checking mishandled when setuid

[Glenn Morris]

Paul Eggert wrote:

> On 10/20/2012 06:44 PM, Glenn Morris wrote:
>> I thought setuid shell scripts were not supported on most UNIXs?
>
> Yes, nowadays it's typically disabled, but there are obvious
> workarounds and people use them. They'll create a tiny executable that
> is setuid, which turns around and invokes the script.

I really can't see how this is something that "People do [...] all the
time, often unwittingly"; but obviously at this point I'm just arguing
for the sake of it...