From: Lars Hjemli <hjemli@gmail.com>
Date: Mon, 11 Dec 2006 21:53:50 +0000 (+0100)
Subject: Don't truncate valid cachefiles
X-Git-Url: https://gitweb.ps.run/ps-cgit/commitdiff_plain/fbaf1171b4e343929dd43ecac7cd9d1c692b84ec?hp=fbaf1171b4e343929dd43ecac7cd9d1c692b84ec

Don't truncate valid cachefiles

An embarrassing thinko in cgit_check_cache() would truncate valid cachefiles
in the following situation:
  1) process A notices a missing/expired cachefile
  2) process B gets scheduled, locks, fills and unlocks the cachefile
  3) process A gets scheduled, locks the cachefile, notices that the cachefile
     now exist/is not expired anymore, and continues to overwrite it with an
     empty lockfile.

Thanks to Linus for noticing (again).

Signed-off-by: Lars Hjemli <hjemli@gmail.com>
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