bug#12632: file permissions checking mishandled when setuid

[Paul Eggert]

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.  It's not something one would recommend for
highly secure environments, but that doesn't mean
it doesn't happen.