From 6c32b6ca5bc0231b679fada13919cffe644fcb48 Mon Sep 17 00:00:00 2001 From: Johannes Schindelin Date: Thu, 5 Oct 2017 11:48:16 +0200 Subject: [PATCH] diff: munmap() file contents before running external diff When running an external diff from, say, a diff tool, it is safe to assume that we want to write the files in question. On Windows, that means that there cannot be any other process holding an open handle to said files. So let's make sure that `git diff` itself is not holding any open handle to the files in question. This fixes https://github.com/git-for-windows/git/issues/1315 Signed-off-by: Johannes Schindelin --- diff.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/diff.c b/diff.c index 136d44b455..93004c0bc0 100644 --- a/diff.c +++ b/diff.c @@ -3819,6 +3819,10 @@ static void run_external_diff(const char *pgm, argv_array_pushf(&env, "GIT_DIFF_PATH_COUNTER=%d", ++o->diff_path_counter); argv_array_pushf(&env, "GIT_DIFF_PATH_TOTAL=%d", q->nr); + if (one && one->should_munmap) + diff_free_filespec_data(one); + if (two && two->should_munmap) + diff_free_filespec_data(two); if (run_command_v_opt_cd_env(argv.argv, RUN_USING_SHELL, NULL, env.argv)) die(_("external diff died, stopping at %s"), name);