[tracker] tracker-extract: Sandbox extractor threads through seccomp

[Carlos Garnacho <carlosg src gnome org>]

commit 5b4132cd2f8528800c187df20336b67063adf2e3
Author: Carlos Garnacho <carlosg gnome org>
Date:   Tue Dec 6 17:08:09 2016 +0100

    tracker-extract: Sandbox extractor threads through seccomp
    
    Those deal with plugins and potentially malicious content, make it
    sure that any potential exploit is deprived of all tools that could
    make it harmful.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=764786

 src/tracker-extract/tracker-extract.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/tracker-extract/tracker-extract.c b/src/tracker-extract/tracker-extract.c
index fee6c7f..ad3148d 100644
--- a/src/tracker-extract/tracker-extract.c
+++ b/src/tracker-extract/tracker-extract.c
@@ -524,6 +524,9 @@ get_metadata (TrackerExtractTask *task)
 static gpointer
 single_thread_get_metadata (GAsyncQueue *queue)
 {
+       if (!tracker_seccomp_init ())
+               g_assert_not_reached ();
+
        while (TRUE) {
                TrackerExtractTask *task;