Re: Strange diagnostic

["Nikita V. Youshchenko" <yoush@cs.msu.su>]

> On Sun, 2003-01-26 at 18:54, Nikita V. Youshchenko wrote:
> > Hello.
> >
> > Please look at the following situation:
> >
> > nikita@sercond:~> ls -l /usr/local/sbin/restart-after-upgrade
> > -rwxr--r--    1 root     root         1044  11  2001
> > /usr/local/sbin/restart-after-upgrade*
> > nikita@sercond:~> which restart-after-upgrade
> > /usr/local/sbin/restart-after-upgrade
> > nikita@sercond:~> restart-after-upgrade
> > bash: /usr/local/sbin/restart-after-upgrade: /bin/bash: bad
> > interpreter: Permission denied
> >
> > Here 'restart-after-upgrade' is a shell script that happens to be
> > executable by root only (I know user can easily source it, I am
> > writing not about security but about diagnostic).
> >
> > So why "which" finds it? And why error message when a user attempts to
> > run it is so strange? Is that normal, or it should be filed as bug
> > reports?
>
> Since it is a script, it presumably starts with
> #! /path/to/interpreter
>
> The problem is that the user doesn't have execute permission on
> /path/to/interpreter

User HAS execute permisions on /bin/bash.