61 lines
1.1 KiB
Go
61 lines
1.1 KiB
Go
// Copyright 2016 the Go-FUSE Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package pathfs
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import (
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"os"
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"github.com/hanwen/go-fuse/fuse"
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)
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func CopyFile(srcFs, destFs FileSystem, srcFile, destFile string, context *fuse.Context) fuse.Status {
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src, code := srcFs.Open(srcFile, uint32(os.O_RDONLY), context)
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if !code.Ok() {
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return code
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}
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defer src.Release()
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defer src.Flush()
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attr, code := srcFs.GetAttr(srcFile, context)
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if !code.Ok() {
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return code
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}
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dst, code := destFs.Create(destFile, uint32(os.O_WRONLY|os.O_CREATE|os.O_TRUNC), attr.Mode, context)
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if !code.Ok() {
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return code
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}
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defer dst.Release()
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defer dst.Flush()
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buf := make([]byte, 128*(1<<10))
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off := int64(0)
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for {
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res, code := src.Read(buf, off)
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if !code.Ok() {
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return code
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}
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data, code := res.Bytes(buf)
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if !code.Ok() {
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return code
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}
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if len(data) == 0 {
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break
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}
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n, code := dst.Write(data, off)
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if !code.Ok() {
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return code
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}
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if int(n) < len(data) {
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return fuse.EIO
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}
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if len(data) < len(buf) {
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break
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}
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off += int64(len(data))
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}
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return fuse.OK
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}
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