mirror of https://github.com/caddyserver/caddy.git
82 lines
2.1 KiB
Go
82 lines
2.1 KiB
Go
// Copyright 2015 Matthew Holt and The Caddy Authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
// Package notify provides facilities for notifying process managers
|
|
// of state changes, mainly for when running as a system service.
|
|
package notify
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
"os"
|
|
"strings"
|
|
)
|
|
|
|
// The documentation about this IPC protocol is available here:
|
|
// https://www.freedesktop.org/software/systemd/man/sd_notify.html
|
|
|
|
func sdNotify(payload string) error {
|
|
if socketPath == "" {
|
|
return nil
|
|
}
|
|
|
|
socketAddr := &net.UnixAddr{
|
|
Name: socketPath,
|
|
Net: "unixgram",
|
|
}
|
|
|
|
conn, err := net.DialUnix(socketAddr.Net, nil, socketAddr)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer conn.Close()
|
|
|
|
_, err = conn.Write([]byte(payload))
|
|
return err
|
|
}
|
|
|
|
// Ready notifies systemd that caddy has finished its
|
|
// initialization routines.
|
|
func Ready() error {
|
|
return sdNotify("READY=1")
|
|
}
|
|
|
|
// Reloading notifies systemd that caddy is reloading its config.
|
|
func Reloading() error {
|
|
return sdNotify("RELOADING=1")
|
|
}
|
|
|
|
// Stopping notifies systemd that caddy is stopping.
|
|
func Stopping() error {
|
|
return sdNotify("STOPPING=1")
|
|
}
|
|
|
|
// Status sends systemd an updated status message.
|
|
func Status(msg string) error {
|
|
return sdNotify("STATUS=" + msg)
|
|
}
|
|
|
|
// Error is like Status, but sends systemd an error message
|
|
// instead, with an optional errno-style error number.
|
|
func Error(err error, errno int) error {
|
|
collapsedErr := strings.ReplaceAll(err.Error(), "\n", " ")
|
|
msg := fmt.Sprintf("STATUS=%s", collapsedErr)
|
|
if errno > 0 {
|
|
msg += fmt.Sprintf("\nERRNO=%d", errno)
|
|
}
|
|
return sdNotify(msg)
|
|
}
|
|
|
|
var socketPath, _ = os.LookupEnv("NOTIFY_SOCKET")
|