/usr/share/gocode/src/github.com/hanwen/go-fuse/fuse/pathfs/copy.go is in golang-github-hanwen-go-fuse-dev 0.0~git20171124.0.14c3015-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 | // Copyright 2016 the Go-FUSE Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package pathfs
import (
"os"
"github.com/hanwen/go-fuse/fuse"
)
func CopyFile(srcFs, destFs FileSystem, srcFile, destFile string, context *fuse.Context) fuse.Status {
src, code := srcFs.Open(srcFile, uint32(os.O_RDONLY), context)
if !code.Ok() {
return code
}
defer src.Release()
defer src.Flush()
attr, code := srcFs.GetAttr(srcFile, context)
if !code.Ok() {
return code
}
dst, code := destFs.Create(destFile, uint32(os.O_WRONLY|os.O_CREATE|os.O_TRUNC), attr.Mode, context)
if !code.Ok() {
return code
}
defer dst.Release()
defer dst.Flush()
buf := make([]byte, 128*(1<<10))
off := int64(0)
for {
res, code := src.Read(buf, off)
if !code.Ok() {
return code
}
data, code := res.Bytes(buf)
if !code.Ok() {
return code
}
if len(data) == 0 {
break
}
n, code := dst.Write(data, off)
if !code.Ok() {
return code
}
if int(n) < len(data) {
return fuse.EIO
}
if len(data) < len(buf) {
break
}
off += int64(len(data))
}
return fuse.OK
}
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