From 53aedc378345f7dba5cdd0544b4aa60733505623 Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher <jakobunt@gmail.com>
Date: Mon, 2 Jan 2017 23:29:52 +0100
Subject: [PATCH] main: disconnect from the controlling terminal

This prevents us from getting SIGINT when the user
kills the running script.
---
 mount.go | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/mount.go b/mount.go
index bd65fc6..3e93169 100644
--- a/mount.go
+++ b/mount.go
@@ -96,9 +96,9 @@ func doMount(args *argContainer) int {
 	// Initialize FUSE server
 	srv := initFuseFrontend(masterkey, args, confFile)
 	tlog.Info.Println(tlog.ColorGreen + "Filesystem mounted and ready." + tlog.ColorReset)
+	var paniclog *os.File
 	// We have been forked into the background, as evidenced by the set
 	// "notifypid".
-	var paniclog *os.File
 	if args.notifypid > 0 {
 		// Chdir to the root directory so we don't block unmounting the CWD
 		os.Chdir("/")
@@ -124,6 +124,13 @@ func doMount(args *argContainer) int {
 			syscall.Dup2(int(paniclog.Fd()), 1)
 			syscall.Dup2(int(paniclog.Fd()), 2)
 		}
+		// Disconnect from the controlling terminal by creating a new session.
+		// This prevents us from getting SIGINT when the user presses Ctrl-C
+		// to exit a running script that has called gocryptfs.
+		_, err = syscall.Setsid()
+		if err != nil {
+			tlog.Warn.Printf("Setsid: %v", err)
+		}
 		// Send SIGUSR1 to our parent
 		sendUsr1(args.notifypid)
 	}