jkroon

Bash and long-standing file descriptors is a pain, to put it politely. For example, I’d like to spawn a sub-process into which I can “write” stuff at arbitrary points in time by doing echo fneh >&4 … sounds simple enough right? But how to spawn that sub process?
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So after having had enough I decided it’s time to make torpage integrate better into the portage locking. The current state isn’t bad, it’s just not complete. The fact of the matter is that it is possible should torpage initiate the fetch that portage will (permitting it attempts to fetch the same file) ignore the fact that torpage is busy downloading the file and kick off a dual download. What’s happening is that torpage (currently) treats the mere existence of the file as a lock, whereas portage takes out a fcntl (lockf) based lock on the file. Using the existince/lack of existence of files as the basis for a lock is a bad idea anyway, so I decided it’s time I took what I learned in the last six years and fix it. (more…)