mirror of https://github.com/caddyserver/caddy.git
77 lines
2.0 KiB
Go
77 lines
2.0 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 caddy
|
|
|
|
import (
|
|
"log"
|
|
"os"
|
|
"os/signal"
|
|
)
|
|
|
|
// TrapSignals create signal/interrupt handlers as best it can for the
|
|
// current OS. This is a rather invasive function to call in a Go program
|
|
// that captures signals already, so in that case it would be better to
|
|
// implement these handlers yourself.
|
|
func TrapSignals() {
|
|
trapSignalsCrossPlatform()
|
|
trapSignalsPosix()
|
|
}
|
|
|
|
// trapSignalsCrossPlatform captures SIGINT or interrupt (depending
|
|
// on the OS), which initiates a graceful shutdown. A second SIGINT
|
|
// or interrupt will forcefully exit the process immediately.
|
|
func trapSignalsCrossPlatform() {
|
|
go func() {
|
|
shutdown := make(chan os.Signal, 1)
|
|
signal.Notify(shutdown, os.Interrupt)
|
|
|
|
for i := 0; true; i++ {
|
|
<-shutdown
|
|
|
|
if i > 0 {
|
|
log.Println("[INFO] SIGINT: Force quit")
|
|
os.Exit(ExitCodeForceQuit)
|
|
}
|
|
|
|
log.Println("[INFO] SIGINT: Shutting down")
|
|
go gracefulStop("SIGINT")
|
|
}
|
|
}()
|
|
}
|
|
|
|
// gracefulStop exits the process as gracefully as possible.
|
|
func gracefulStop(sigName string) {
|
|
exitCode := ExitCodeSuccess
|
|
|
|
err := stopAndCleanup()
|
|
if err != nil {
|
|
log.Printf("[ERROR] %s stop: %v", sigName, err)
|
|
exitCode = ExitCodeFailedQuit
|
|
}
|
|
|
|
log.Printf("[INFO] %s: Shutdown done", sigName)
|
|
os.Exit(exitCode)
|
|
}
|
|
|
|
// Exit codes. Generally, you should NOT
|
|
// automatically restart the process if the
|
|
// exit code is ExitCodeFailedStartup (1).
|
|
const (
|
|
ExitCodeSuccess = iota
|
|
ExitCodeFailedStartup
|
|
ExitCodeForceQuit
|
|
ExitCodeFailedQuit
|
|
)
|