Adding upstream version 1.34.4.

Signed-off-by: Daniel Baumann <daniel@debian.org>

plugins/inputs/filecount/filesystem_helpers.go

@@ -0,0 +1,33 @@
+package filecount
+
+import (
+	"io"
+	"os"
+)
+
+/*
+	The code below is lifted from numerous articles and originates from Andrew Gerrand's 10 things you (probably) don't know about Go.
+	It allows for mocking a filesystem; this allows for consistent testing of this code across platforms (directory sizes reported
+	differently by different platforms, for example), while preserving the rest of the functionality as-is, without modification.
+*/
+
+type fileSystem interface {
+	open(name string) (file, error)
+	stat(name string) (os.FileInfo, error)
+	lstat(name string) (os.FileInfo, error)
+}
+
+type file interface {
+	io.Closer
+	io.Reader
+	io.ReaderAt
+	io.Seeker
+	Stat() (os.FileInfo, error)
+}
+
+// osFS implements fileSystem using the local disk
+type osFS struct{}
+
+func (osFS) open(name string) (file, error)         { return os.Open(name) }
+func (osFS) stat(name string) (os.FileInfo, error)  { return os.Stat(name) }
+func (osFS) lstat(name string) (os.FileInfo, error) { return os.Lstat(name) }