Howard Chu wrote:
Michael B Allen wrote:
But using a file backed mapping is still no better than a disk file
ccache. You would have to use an anonymous mapping to protect the storage
from non-decendent processes.
Anyway, the notion of a kernel driver to solve this problem is definitely
overkill. You can get the same functionality in purely user-level code.
Of course there's a flaw in both this daemon idea and in Michael's ioctl idea -
if a process's parent exits, the child becomes owned by process 1, so you can't
rely on walking up the process tree to find a parent ccache. The only sure
thing is descriptor inheritance, and that only works if a particular process
doesn't stomp on the descriptor before spawning any children.
--
-- Howard Chu
Chief Architect, Symas Corp. http://www.symas.com
Director, Highland Sun http://highlandsun.com/hyc/
Chief Architect, OpenLDAP http://www.openldap.org/project/
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