From 0830c728fe3422e18c1db17f3419617972626e52 Mon Sep 17 00:00:00 2001
From: Matthew Holt <Matthew.Holt+git@gmail.com>
Date: Sat, 9 Jan 2016 21:48:07 -0700
Subject: [PATCH] Remove pidfile when program exits (closes #495)

---
 caddy/sigtrap.go       | 8 ++++++++
 caddy/sigtrap_posix.go | 6 ++++++
 2 files changed, 14 insertions(+)

diff --git a/caddy/sigtrap.go b/caddy/sigtrap.go
index 39b7bd77d..6fd00cac5 100644
--- a/caddy/sigtrap.go
+++ b/caddy/sigtrap.go
@@ -32,10 +32,18 @@ func trapSignalsCrossPlatform() {
 
 			if i > 0 {
 				log.Println("[INFO] SIGINT: Force quit")
+				if PidFile != "" {
+					os.Remove(PidFile)
+				}
 				os.Exit(1)
 			}
 
 			log.Println("[INFO] SIGINT: Shutting down")
+
+			if PidFile != "" {
+				os.Remove(PidFile)
+			}
+
 			go os.Exit(executeShutdownCallbacks("SIGINT"))
 		}
 	}()
diff --git a/caddy/sigtrap_posix.go b/caddy/sigtrap_posix.go
index 2777ebc2e..ac3000d76 100644
--- a/caddy/sigtrap_posix.go
+++ b/caddy/sigtrap_posix.go
@@ -20,6 +20,9 @@ func trapSignalsPosix() {
 			switch sig {
 			case syscall.SIGTERM:
 				log.Println("[INFO] SIGTERM: Terminating process")
+				if PidFile != "" {
+					os.Remove(PidFile)
+				}
 				os.Exit(0)
 
 			case syscall.SIGQUIT:
@@ -30,6 +33,9 @@ func trapSignalsPosix() {
 					log.Printf("[ERROR] SIGQUIT stop: %v", err)
 					exitCode = 1
 				}
+				if PidFile != "" {
+					os.Remove(PidFile)
+				}
 				os.Exit(exitCode)
 
 			case syscall.SIGHUP: