From 5ece9dc514b1fbba21e36a34f7fae42812e1d33a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Paul=20B=C3=BCtow?= <pbuetow@mimecast.com>
Date: Sun, 16 Feb 2020 18:07:36 +0000
Subject: server kills subprocesses correctly on cancel

---
 cmd/dserver/main.go | 39 ++++++++++++++++++---------------------
 1 file changed, 18 insertions(+), 21 deletions(-)

(limited to 'cmd/dserver')

diff --git a/cmd/dserver/main.go b/cmd/dserver/main.go
index 03834f1..94f1a87 100644
--- a/cmd/dserver/main.go
+++ b/cmd/dserver/main.go
@@ -4,12 +4,13 @@ import (
 	"context"
 	"flag"
 	"os"
+	"os/signal"
+	"syscall"
 	"time"
 
 	"github.com/mimecast/dtail/internal/color"
 	"github.com/mimecast/dtail/internal/config"
 	"github.com/mimecast/dtail/internal/io/logger"
-	"github.com/mimecast/dtail/internal/pprof"
 	"github.com/mimecast/dtail/internal/server"
 	"github.com/mimecast/dtail/internal/user"
 	"github.com/mimecast/dtail/internal/version"
@@ -21,7 +22,6 @@ func main() {
 	var debugEnable bool
 	var displayVersion bool
 	var noColor bool
-	var pprofEnable bool
 	var shutdownAfter int
 	var sshPort int
 
@@ -30,7 +30,6 @@ func main() {
 	flag.BoolVar(&debugEnable, "debug", false, "Activate debug messages")
 	flag.BoolVar(&displayVersion, "version", false, "Display version")
 	flag.BoolVar(&noColor, "noColor", false, "Disable ANSII terminal colors")
-	flag.BoolVar(&pprofEnable, "pprofEnable", false, "Enable pprof server")
 	flag.IntVar(&shutdownAfter, "shutdownAfter", 0, "Automatically shutdown after so many seconds")
 	flag.IntVar(&sshPort, "port", 2222, "SSH server port")
 	flag.StringVar(&cfgFile, "cfg", "", "Config file path")
@@ -44,30 +43,28 @@ func main() {
 		version.PrintAndExit()
 	}
 
-	ctx := context.Background()
+	ctx, cancel := context.WithCancel(context.Background())
+	if shutdownAfter > 0 {
+		logger.Info("Enabling auto shutdown timer", shutdownAfter)
+		ctx, cancel = context.WithTimeout(ctx, time.Duration(shutdownAfter)*time.Second)
+	}
+
+	sigCh := make(chan os.Signal)
+	signal.Notify(sigCh, os.Interrupt, syscall.SIGTERM)
+
+	go func() {
+		select {
+		case <-sigCh:
+			cancel()
+		case <-ctx.Done():
+		}
+	}()
 
 	serverEnable := true
 	silentEnable := false
 	nothingEnable := false
 	logger.Start(ctx, serverEnable, debugEnable, silentEnable, nothingEnable)
 
-	if shutdownAfter > 0 {
-		go func() {
-			defer os.Exit(1)
-
-			logger.Info("Enabling auto shutdown timer", shutdownAfter)
-			select {
-			case <-time.After(time.Duration(shutdownAfter) * time.Second):
-				logger.Info("Auto shutdown timer reached, shutting down now")
-			case <-ctx.Done():
-			}
-		}()
-	}
-
-	if pprofEnable || config.Common.PProfEnable {
-		pprof.Start()
-	}
-
 	serv := server.New()
 	status := serv.Start(ctx)
 	logger.Flush()
-- 
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