mirror of
https://github.com/tailscale/tailscale.git
synced 2024-12-04 23:45:34 +00:00
71029cea2d
This updates all source files to use a new standard header for copyright and license declaration. Notably, copyright no longer includes a date, and we now use the standard SPDX-License-Identifier header. This commit was done almost entirely mechanically with perl, and then some minimal manual fixes. Updates #6865 Signed-off-by: Will Norris <will@tailscale.com>
78 lines
1.9 KiB
Go
78 lines
1.9 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
|
|
// SPDX-License-Identifier: BSD-3-Clause
|
|
|
|
//go:build linux
|
|
|
|
package systemd
|
|
|
|
import (
|
|
"errors"
|
|
"log"
|
|
"os"
|
|
"sync"
|
|
|
|
"github.com/mdlayher/sdnotify"
|
|
)
|
|
|
|
var getNotifyOnce struct {
|
|
sync.Once
|
|
v *sdnotify.Notifier
|
|
}
|
|
|
|
type logOnce struct {
|
|
sync.Once
|
|
}
|
|
|
|
func (l *logOnce) logf(format string, args ...any) {
|
|
l.Once.Do(func() {
|
|
log.Printf(format, args...)
|
|
})
|
|
}
|
|
|
|
var (
|
|
readyOnce = &logOnce{}
|
|
statusOnce = &logOnce{}
|
|
)
|
|
|
|
func notifier() *sdnotify.Notifier {
|
|
getNotifyOnce.Do(func() {
|
|
var err error
|
|
getNotifyOnce.v, err = sdnotify.New()
|
|
// Not exist means probably not running under systemd, so don't log.
|
|
if err != nil && !errors.Is(err, os.ErrNotExist) {
|
|
log.Printf("systemd: systemd-notifier error: %v", err)
|
|
}
|
|
})
|
|
return getNotifyOnce.v
|
|
}
|
|
|
|
// Ready signals readiness to systemd. This will unblock service dependents from starting.
|
|
func Ready() {
|
|
err := notifier().Notify(sdnotify.Ready)
|
|
if err != nil {
|
|
readyOnce.logf("systemd: error notifying: %v", err)
|
|
}
|
|
}
|
|
|
|
// Status sends a single line status update to systemd so that information shows up
|
|
// in systemctl output. For example:
|
|
//
|
|
// $ systemctl status tailscale
|
|
// ● tailscale.service - Tailscale client daemon
|
|
// Loaded: loaded (/nix/store/qc312qcy907wz80fqrgbbm8a9djafmlg-unit-tailscale.service/tailscale.service; enabled; vendor preset: enabled)
|
|
// Active: active (running) since Tue 2020-11-24 17:54:07 EST; 13h ago
|
|
// Main PID: 26741 (.tailscaled-wra)
|
|
// Status: "Connected; user@host.domain.tld; 100.101.102.103"
|
|
// IP: 0B in, 0B out
|
|
// Tasks: 22 (limit: 4915)
|
|
// Memory: 30.9M
|
|
// CPU: 2min 38.469s
|
|
// CGroup: /system.slice/tailscale.service
|
|
// └─26741 /nix/store/sv6cj4mw2jajm9xkbwj07k29dj30lh0n-tailscale-date.20200727/bin/tailscaled --port 41641
|
|
func Status(format string, args ...any) {
|
|
err := notifier().Notify(sdnotify.Statusf(format, args...))
|
|
if err != nil {
|
|
statusOnce.logf("systemd: error notifying: %v", err)
|
|
}
|
|
}
|