From ac48c079b01c85a115bd660da260a04ba94e025a Mon Sep 17 00:00:00 2001
From: qua3k <qua3kr@gmail.com>
Date: Fri, 17 Jun 2022 13:18:02 -0400
Subject: [PATCH] Print error message on empty BPF

This is useful when we're not sure if a filter is installed or not
---
 lib/seccomp-tools/dumper.rb | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/seccomp-tools/dumper.rb b/lib/seccomp-tools/dumper.rb
index 821bf79..47dbed6 100644
--- a/lib/seccomp-tools/dumper.rb
+++ b/lib/seccomp-tools/dumper.rb
@@ -182,6 +182,7 @@ def dump_by_pid(pid, limit, &block)
           begin
             bpf = Ptrace.seccomp_get_filter(pid, i)
           rescue Errno::ENOENT, Errno::EINVAL
+            Logger.error('No seccomp filters installed')
             break
           end
           collect << (block.nil? ? bpf : yield(bpf, nil))