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a5da4ed981
This adds "//go:build" lines and tidies up existing "// +build" lines. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
44 lines
1.1 KiB
Go
44 lines
1.1 KiB
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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//go:build (windows || freebsd || openbsd || (darwin && go1.16) || (darwin && !go1.16 && !arm64)) && !ios
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// +build windows freebsd openbsd darwin,go1.16 darwin,!go1.16,!arm64
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// +build !ios
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package portlist
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import (
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"fmt"
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"os/exec"
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"strings"
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)
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var osHideWindow func(*exec.Cmd) // non-nil on Windows; see portlist_windows.go
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// hideWindow returns c. On Windows it first sets SysProcAttr.HideWindow.
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func hideWindow(c *exec.Cmd) *exec.Cmd {
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if osHideWindow != nil {
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osHideWindow(c)
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}
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return c
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}
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func listPortsNetstat(arg string) (List, error) {
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exe, err := exec.LookPath("netstat")
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if err != nil {
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return nil, fmt.Errorf("netstat: lookup: %v", err)
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}
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output, err := hideWindow(exec.Command(exe, arg)).Output()
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if err != nil {
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xe, ok := err.(*exec.ExitError)
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stderr := ""
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if ok {
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stderr = strings.TrimSpace(string(xe.Stderr))
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}
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return nil, fmt.Errorf("netstat: %v (%q)", err, stderr)
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}
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return parsePortsNetstat(string(output)), nil
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}
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