FUSE: add os specific mount options

related to https://github.com/chrislusf/seaweedfs/issues/1094

weed/command/mount_darwin.go

@@ -0,0 +1,10 @@
+package command
+
+import (
+
+	"github.com/seaweedfs/fuse"
+)
+
+func osSpecificMountOptions() []fuse.MountOption {
+	return []fuse.MountOption{}
+}

weed/command/mount_freebsd.go

@@ -0,0 +1,10 @@
+package command
+
+import (
+
+	"github.com/seaweedfs/fuse"
+)
+
+func osSpecificMountOptions() []fuse.MountOption {
+	return []fuse.MountOption{}
+}

weed/command/mount_linux.go

@@ -0,0 +1,12 @@
+package command
+
+import (
+
+	"github.com/seaweedfs/fuse"
+)
+
+func osSpecificMountOptions() []fuse.MountOption {
+	return []fuse.MountOption{
+		fuse.AllowNonEmptyMount(),
+	}
+}

weed/command/mount_notsupported.go

@@ -1,5 +1,6 @@
 // +build !linux
 // +build !darwin
+// +build !freebsd
 
 package command
 

weed/command/mount_std.go

@@ -1,4 +1,4 @@
-// +build linux darwin
+// +build linux darwin freebsd
 
 package command
 
@@ -107,6 +107,9 @@ func RunMount(filer, filerMountRootPath, dir, collection, replication, dataCente
 		fuse.WritebackCache(),
 		fuse.AllowNonEmptyMount(),
 	}
+
+	options = append(options, osSpecificMountOptions()...)
+
 	if allowOthers {
 		options = append(options, fuse.AllowOther())
 	}