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tailscale/portlist/netstat_exec.go

35 lines
857 B
Go

// Copyright (c) 2020 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.
//go:build (windows || freebsd || openbsd || darwin) && !ios && !js
// +build windows freebsd openbsd darwin
// +build !ios
// +build !js
package portlist
import (
"fmt"
"os/exec"
"strings"
)
func appendListeningPortsNetstat(base []Port, arg string) ([]Port, error) {
exe, err := exec.LookPath("netstat")
if err != nil {
return nil, fmt.Errorf("netstat: lookup: %v", err)
}
output, err := exec.Command(exe, arg).Output()
if err != nil {
xe, ok := err.(*exec.ExitError)
stderr := ""
if ok {
stderr = strings.TrimSpace(string(xe.Stderr))
}
return nil, fmt.Errorf("netstat: %v (%q)", err, stderr)
}
return appendParsePortsNetstat(base, string(output)), nil
}