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This is preliminary work for using the directManager as part of a wslManager on windows, where in addition to configuring windows we'll use wsl.exe to edit the linux file system and modify the system resolv.conf. The pinholeFS is a little funky, but it's designed to work through simple unix tools via wsl.exe without invoking bash. I would not have thought it would stand on its own like this, but it turns out it's useful for writing a test for the directManager. Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
31 lines
653 B
Go
31 lines
653 B
Go
// Copyright (c) 2020 Tailscale Inc & 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 dns
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import (
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"fmt"
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"io/ioutil"
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"os"
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"tailscale.com/types/logger"
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)
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func NewOSConfigurator(logf logger.Logf, _ string) (OSConfigurator, error) {
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bs, err := ioutil.ReadFile("/etc/resolv.conf")
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if os.IsNotExist(err) {
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return newDirectManager(), nil
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}
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if err != nil {
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return nil, fmt.Errorf("reading /etc/resolv.conf: %w", err)
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}
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switch resolvOwner(bs) {
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case "resolvconf":
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return newResolvconfManager(logf)
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default:
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return newDirectManager(), nil
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}
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}
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