Re: cua* on kernel 2.1 and beyond

Tymm Twillman (tymm@coe.missouri.edu)
Fri, 4 Dec 1998 23:14:24 -0600

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> On Thu, 3 Dec 1998, Tymm Twillman wrote:
>
> > ln -s /dev/ttyS0 /dev/cua0
>
> This is bad!
>
> A process using /dev/cua0 will create a lockfile named cua0. Another
> process wanting to use /dev/ttyS0, will look for a lockfile named
> ttyS0. When it is not found, that process will go ahead and open
> ttyS0 and collide with the data being transferred on cua0.
>
> A complex locking routine can be used. See my blurb on lockfiles and
> a sample routine to creat either dual lockfiles or single ones.
>
> This is available from scicom.alphacdc.com via ftp. The tarball is
> pub/linux/serial_suite.tgz.
>
> vern
>

Yep, I really bumbled this one up. Apologies for the bad advice.

-Tymm

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