Standardize exit codes and improve shutdown handling; update gitignore

1 files changed, 57 insertions, 0 deletions

diff --git a/sigtrap_posix.go b/sigtrap_posix.go
new file mode 100644
index 0000000..63e6a31
--- /dev/null
+++ b/sigtrap_posix.go
@@ -0,0 +1,57 @@
+// 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.
+
+// +build !windows,!plan9,!nacl,!js
+
+package caddy
+
+import (
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"github.com/mholt/certmagic"
+)
+
+// trapSignalsPosix captures POSIX-only signals.
+func trapSignalsPosix() {
+	go func() {
+		sigchan := make(chan os.Signal, 1)
+		signal.Notify(sigchan, syscall.SIGTERM, syscall.SIGHUP, syscall.SIGQUIT, syscall.SIGUSR1, syscall.SIGUSR2)
+
+		for sig := range sigchan {
+			switch sig {
+			case syscall.SIGQUIT:
+				log.Println("[INFO] SIGQUIT: Quitting process immediately")
+				certmagic.CleanUpOwnLocks() // try to clean up locks anyway, it's important
+				os.Exit(ExitCodeForceQuit)
+
+			case syscall.SIGTERM:
+				log.Println("[INFO] SIGTERM: Shutting down apps then terminating")
+				gracefulStop("SIGTERM")
+
+			case syscall.SIGUSR1:
+				log.Println("[INFO] SIGUSR1: Not implemented")
+
+			case syscall.SIGUSR2:
+				log.Println("[INFO] SIGUSR2: Not implemented")
+
+			case syscall.SIGHUP:
+				// ignore; this signal is sometimes sent outside of the user's control
+				log.Println("[INFO] SIGHUP: Not implemented")
+			}
+		}
+	}()
+}