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    SubjectRe: permissions of /proc/tty/driver
    On Llu, 2005-01-17 at 08:14, Arjan van de Ven wrote:
    > On Sun, 2005-01-16 at 23:26 +0100, Christoph Hellwig wrote:
    > > I know. But that doesn't explain why we don't keep strict permissions
    > > only on that file but on the directory.
    > ls -la on the file gives you the size maybe ?

    I went for a dig in the archives

    The original fix removed the tx/rx data from the file if you weren't
    priviledged. Linus did the directory hack because he didn't want to
    worry about drivers that got missed out/not fixed.

    So there's a janitor project there - to go through all the tty/serial
    drivers and make sure they don't give out excessively useful information
    to non CAP_SYS_RAWIO users, then loosen permissions.

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