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    SubjectRe: PROBLEM?: "permission denied" when accessing /proc/self/fd/* after setuid
    On Fri, Aug 08, 2008 at 10:08:21AM +0930, Daryl Tester wrote:
    >>> The above environment isn't necessary to replicate the problem, although
    >>> what stdout and stderr are attached to has some effect. The attached C
    >>> code replicates the issue, but appears to not fail (that is, succeed) if
    >>> /proc/self/fd/2 is a terminal (e.g. /dev/pts/X) *and* that terminal is
    >>> owned by the same uid that the code uses (in this case, 500). In the
    >>> case of an anonymous pipe it appears to fail consistently as the pipe is
    >>> owned by root.

    Something similar was fixed in 2.6.22, but let me check.



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