From a43b5836568dd57ed61415a1f058b29e18478059 Mon Sep 17 00:00:00 2001
From: Richard Russon <rich@flatcap.org>
Date: Fri, 21 Dec 2018 16:54:46 +0000
Subject: [PATCH] mbox: allow non-file mailboxes

We disallow directories, but allow files or other devices.
This means we can run `neomutt -f /dev/null` again.
---
 mbox/mbox.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/mbox/mbox.c b/mbox/mbox.c
index cca4a607e..f003fc44e 100644
--- a/mbox/mbox.c
+++ b/mbox/mbox.c
@@ -1632,11 +1632,14 @@ static int mbox_msg_padding_size(struct Mailbox *m)
  */
 enum MailboxType mbox_path_probe(const char *path, const struct stat *st)
 {
-  if (!path)
+  if (!path || !st)
     return MUTT_UNKNOWN;
 
-  if (!st || !S_ISREG(st->st_mode))
+  if (S_ISDIR(st->st_mode))
+  {
+    mutt_error("%s is not a mailbox", path);
     return MUTT_UNKNOWN;
+  }
 
   if (st->st_size == 0)
     return MUTT_MBOX;
-- 
2.50.1