From: Jeff King <peff@peff.net>
Date: Sat, 19 Apr 2014 19:11:29 GMT
Subject: [PATCH 0/6] run_external_diff cleanups
Message-ID: <20140419191128.GA9266@sigill.intra.peff.net>

It's possible to overflow an array in run_external_diff and write a
single NULL onto the stack. The first patch below fixes that. The rest
are cleanups and modernizations I noticed while in the area. It's
possible that patch 3 is also a bug fix, depending on your
interpretation.

  [1/6]: run_external_diff: use an argv_array for the command line
  [2/6]: run_external_diff: use an argv_array for the environment
  [3/6]: run_external_diff: clean up error handling
  [4/6]: run_external_diff: drop fflush(NULL)
  [5/6]: run_external_diff: hoist common bits out of conditional
  [6/6]: run_external_diff: refactor cmdline setup logic

-Peff