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net/dns: fix checking for wrapped error when attempting to read wsl.conf for Windows WSL2 

Fixes https://github.com/tailscale/tailscale/issues/3437

Signed-off-by: Aaron Klotz <aaron@tailscale.com>
pull/3465/head
Aaron Klotz 2021-11-30 15:18:42 -07:00
parent b800663779
commit f93cf6fa03
1 changed files with 3 additions and 1 deletions
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4
net/dns/wsl_windows.go
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@ -6,6 +6,7 @@ package dns
import ( import (
"bytes" "bytes"
"errors"
"fmt" "fmt"
"os" "os"
"os/exec" "os/exec"
@ -157,7 +158,8 @@ func (fs wslFS) Truncate(name string) error { return fs.WriteFile(name, nil, 064
func (fs wslFS) ReadFile(name string) ([]byte, error) { func (fs wslFS) ReadFile(name string) ([]byte, error) {
b, err := wslCombinedOutput(fs.cmd("cat", "--", name)) b, err := wslCombinedOutput(fs.cmd("cat", "--", name))
if ee, _ := err.(*exec.ExitError); ee != nil && ee.ExitCode() == 1 { var ee *exec.ExitError
if errors.As(err, &ee) && ee.ExitCode() == 1 {
return nil, os.ErrNotExist return nil, os.ErrNotExist
} }
return b, err return b, err