Getting 'bad file number' error writing to device driver

[Mandeep Sandhu]

> Thanks for the link; but this bit has to be set on the original executable.
> Is there any way a program in user mode can get around this or set the bit
> himself?

Ummm...now that would be a security violation, don't you think? If a
program can elevate it's own privileges, then whats the point of
having access control! :)

I think a user-space program will always need _some_ help from a
privileged user/program. Eg in the case of setuid, typically the root
user will be setting this bit (on a executable) so that an
unprivileged user can execute with temporarily elevated privileges.

CMIIW.

HTH,
-mandeep


> Anil
>
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