tailscale/net/dns/ini.go
David Crawshaw 1147c7fd4f net/dns: set WSL /etc/resolv.conf
We also have to make a one-off change to /etc/wsl.conf to stop every
invocation of wsl.exe clobbering the /etc/resolv.conf. This appears to
be a safe change to make permanently, as even though the resolv.conf is
constantly clobbered, it is always the same stable internal IP that is
set as a nameserver. (I believe the resolv.conf clobbering predates the
MS stub resolver.)

Tested on WSL2, should work for WSL1 too.

Fixes #775

Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
2021-06-28 14:18:15 -07:00

30 lines
841 B
Go

// Copyright (c) 2021 Tailscale Inc & 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 dns
import (
"regexp"
"strings"
)
// parseIni parses a basic .ini file, used for wsl.conf.
func parseIni(data string) map[string]map[string]string {
sectionRE := regexp.MustCompile(`^\[([^]]+)\]`)
kvRE := regexp.MustCompile(`^\s*(\w+)\s*=\s*([^#]*)`)
ini := map[string]map[string]string{}
var section string
for _, line := range strings.Split(data, "\n") {
if res := sectionRE.FindStringSubmatch(line); len(res) > 1 {
section = res[1]
ini[section] = map[string]string{}
} else if res := kvRE.FindStringSubmatch(line); len(res) > 2 {
k, v := strings.TrimSpace(res[1]), strings.TrimSpace(res[2])
ini[section][k] = v
}
}
return ini
}