On Fri, 3 May 2002, Pavel Machek wrote:
> > + if (S_ISDIR(inode->i_mode) && capable(CAP_DAC_READ_SEARCH))
> > + return 0;
> Is this right? This means that root can do cat /, no? That does not
> seem like expected behaviour.
1) it's permission(..., MAY_EXEC)
2) in any case, root _can_ open "/" with O_RDONLY. Always could. That's
what you do for ls /, after all - open(2) followed by getdents(2). Now,
read(2) will fail (check what ->read() for directories is set to), but
that has nothing to permission checks.
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This archive was generated by hypermail 2b29 : Tue May 07 2002 - 22:00:18 EST