[PATCH 07 of 23] mmdf: populate probe callback

[Damien Riegel]

# HG changeset patch
# User Damien Riegel <damien.rie...@gmail.com>
# Date 1462465911 14400
#      Thu May 05 12:31:51 2016 -0400
# Node ID 385adc8ca7bb4355f05a4553ea5435273a496ff9
# Parent  54af62db9cf839c6c1cc3cd4978e7e0dedb65693
mmdf: populate probe callback

For now, we rely on mx_get_magic to not make the implementation too
cumbersome. The point is to get rid of this "magic" anyway. We need to
create a dedicated mx_ops structure for that as the probe function is
different of the one for mbox.

diff -r 54af62db9cf8 -r 385adc8ca7bb mbox.c
--- a/mbox.c    Thu May 05 12:31:16 2016 -0400
+++ b/mbox.c    Thu May 05 12:31:51 2016 -0400
@@ -421,11 +421,21 @@
   return 0;
 }
 
+static int mmdf_probe(const char *path)
+{
+  return mx_get_magic(path) == M_MMDF;
+}
+
 struct mx_ops mx_mbox_ops = {
   .probe = mbox_probe,
   .close = mbox_close_mailbox,
 };
 
+struct mx_ops mx_mmdf_ops = {
+  .probe = mmdf_probe,
+  .close = mbox_close_mailbox,
+};
+
 /* open a mbox or mmdf style mailbox */
 int mbox_open_mailbox (CONTEXT *ctx)
 {