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On Sep 13, 2010, at 12:58 39PM, David Laight wrote:
> On Sat, Sep 11, 2010 at 02:01:43PM -0700, Chuck Silvers wrote:
>> hi folks,
>> the remaining missing bit that prevents acroread from working with the new
>> linux emulation code (PR 43695) is support for the O_DIRECTORY flag to
> Is there a way to open a directory on which you have neither read nor
> write access (maybe not even search access) ?
You can only open something for which you have *some* access right.
Traditionally, Unix has done access rights checking only at open time, not at
> Sometimes it is necessary to open "." in order to do a later fchdir().
> And if/when we support apenat() then you have a good justification for
> only requiring 'x' access.
This poses an interesting question -- what flags should go in the open() call
to permit search path but not read? (Btw -- I assume you meant openat(), not
--Steve Bellovin, http://www.cs.columbia.edu/~smb
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