On Wed, Aug 20, 2014 at 2:27 PM, Alvaro Herrera <alvhe...@2ndquadrant.com> wrote: > Hmm, the real trick here is linkat(... "/proc/self/foobar"), not the > O_TMPFILE: you can have an open file descriptor to an "invisible" file > simply by creating a normal file and unlinking it. I looked at linkat() > yesterday but the idea of using /proc/self didn't occur to me. Nasty > trick :-( It seems linkat() is quite a bit more portable than > O_TMPFILE, fortunately ...
Supposedly linkat(2) on Linux refuses to create a link to a file that was opened normally and had its last link removed with unlink(2) due to concerns that this would create security holes. -- greg -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
