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    SubjectRe: [RFC] Subtle race in dup2() and permissions on /proc/<pid>/fd/<n>


    On Fri, 25 Jun 1999, Peter Benie wrote:

    > Alexander Viro writes ("Re: [RFC] Subtle race in dup2() and permissions on /proc/<pid>/fd/<n>"):
    > > On Fri, 25 Jun 1999, Peter Benie wrote:
    > >
    > > > They look like symlinks, but the behaviour is closer to that of
    > > > hard links, and the permissions do mean something. Keep them as they are.
    > >
    > > *Only* if you are doing lstat() on them. Everything else doesn't care.
    >
    > If I'm looking at /proc/*/fd at all, the chances are that I'm
    > investigating what a particular program is up to. 'ls -l' uses lstat()
    > and gives me some information about what's going on.

    OK, accepted. lstat() is not the best channel for passing such
    information, but so be it.


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