add scoutfs move_blocks

examples/moveblocks/main.go

@@ -0,0 +1,41 @@
+// Copyright (c) 2021 Versity Software, Inc.
+//
+// Use of this source code is governed by a BSD-3-Clause license
+// that can be found in the LICENSE file in the root of the source
+// tree.
+
+package main
+
+import (
+	"fmt"
+	"os"
+
+	scoutfs "github.com/versity/scoutfs-go"
+)
+
+func main() {
+	if len(os.Args) != 3 || os.Args[1] == "-h" {
+		fmt.Fprintln(os.Stderr, "usage:", os.Args[0], "<file_to_move_blocks_from> <file_to_append_blocks_to>")
+		os.Exit(1)
+	}
+
+	ffrom, err := os.OpenFile(os.Args[1], os.O_RDWR, 0666)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "open %v: %v\n", os.Args[1], err)
+		os.Exit(1)
+	}
+	defer ffrom.Close()
+
+	fto, err := os.OpenFile(os.Args[2], os.O_RDWR, 0666)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "open %v: %v\n", os.Args[2], err)
+		os.Exit(1)
+	}
+	defer fto.Close()
+
+	err = scoutfs.MoveData(ffrom, fto)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "move blocks: %v\n", err)
+		os.Exit(1)
+	}
+}