James Carlson <james.d.carlson at sun.com> wrote:
> Assuming that other OSes present the same problem -- mere stat()
> doesn't trigger a fetch of the correct information, but opendir() does
> -- it'd be nice to see a standards-based solution for this. I'm not
> sure that's a requirement here, though.
>
> I think the alternative (one that preserves the existing security
> checks) would be to add a new flag to fstatat(2). Create a new flag
> called (say) AT_TRIGGER, and have it invoke the same autofs triggering
> that opendir() does, so that the node information returned is
> correct. That way, you wouldn't have to do the double stat after
> opendir return, or disable the test.
First: I don't like a flag that lives inside st_mode as it could be in conflict
with future POSIX enhancements.
The idea that:
f = open(".", 0);
fstatat(f, "dir", &stbuf, AT_TRIGGER);
returns the same struct stat as:
dp = opendir("dir");
stat("dir", &stbuf);
looks much more aligned to the spirit of POSIX.
J?rg
--
EMail:joerg at schily.isdn.cs.tu-berlin.de (home) J?rg Schilling D-13353 Berlin
js at cs.tu-berlin.de (uni)
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http://schily.blogspot.com/
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