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31 lines
653 B
Go
31 lines
653 B
Go
// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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//go:build linux
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package xfs
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import (
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"errors"
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"fmt"
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"io/fs"
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"os"
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"syscall"
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)
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// AsOSFile attempts to convert fs.File to *os.File.
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func AsOSFile(f fs.File, name string) (*os.File, error) {
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ff, ok := f.(File)
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if !ok {
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return nil, errors.ErrUnsupported
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}
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newFd, err := syscall.Dup(int(ff.Fd()))
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if err != nil {
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return nil, fmt.Errorf("failed to duplicate file descriptor: %w", err)
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}
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return os.NewFile(uintptr(newFd), name), nil
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}
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