From f7f3043653abe699602f910ddd09c1405675c7f6 Mon Sep 17 00:00:00 2001
From: Werner Koch <wk@gnupg.org>
Date: Wed, 2 May 2018 19:03:07 +0200
Subject: [PATCH] gpg: Fix "Too many open files" when using --multifile.

* common/miscellaneous.c (is_file_compressed): Don't cache the file.
--

This seems to be a pretty old bug.  The fix is easy and also reveals
that -z0 can be used as a workaround.

GnuPG-bug-id: 3951
Signed-off-by: Werner Koch <wk@gnupg.org>
---
 common/miscellaneous.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/common/miscellaneous.c b/common/miscellaneous.c
index caeb66f81..62ac05a84 100644
--- a/common/miscellaneous.c
+++ b/common/miscellaneous.c
@@ -401,6 +401,7 @@ is_file_compressed (const char *s, int *ret_rc)
         *ret_rc = gpg_error_from_syserror ();
         return 0;
     }
+    iobuf_ioctl (a, IOBUF_IOCTL_NO_CACHE, 1, NULL);
 
     if ( iobuf_get_filelength( a, &overflow ) < 6 && !overflow) {
         *ret_rc = 0;