From 2dcb52782824856a92beaef071ef2d7805479df3 Mon Sep 17 00:00:00 2001
From: Klaus Post <klauspost@gmail.com>
Date: Fri, 14 Aug 2015 15:32:07 +0200
Subject: [PATCH] Only use Setsid on Unix.

Setsid is not a part of syscall.SysProcAttr on Windows, so we only set that on
systems that have it.
---
 backend/sftp/sftp.go      |  4 +++-
 backend/sftp/sftp_unix.go | 12 ++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)
 create mode 100644 backend/sftp/sftp_unix.go

diff --git a/backend/sftp/sftp.go b/backend/sftp/sftp.go
index 71c874f0b..08641fd5e 100644
--- a/backend/sftp/sftp.go
+++ b/backend/sftp/sftp.go
@@ -28,6 +28,8 @@ type SFTP struct {
 	cmd *exec.Cmd
 }
 
+var sysProcAttr syscall.SysProcAttr
+
 func startClient(program string, args ...string) (*SFTP, error) {
 	// Connect to a remote host and request the sftp subsystem via the 'ssh'
 	// command.  This assumes that passwordless login is correctly configured.
@@ -37,7 +39,7 @@ func startClient(program string, args ...string) (*SFTP, error) {
 	cmd.Stderr = os.Stderr
 
 	// ignore signals sent to the parent (e.g. SIGINT)
-	cmd.SysProcAttr = &syscall.SysProcAttr{Setsid: true}
+	cmd.SysProcAttr = &sysProcAttr
 
 	// get stdin and stdout
 	wr, err := cmd.StdinPipe()
diff --git a/backend/sftp/sftp_unix.go b/backend/sftp/sftp_unix.go
new file mode 100644
index 000000000..577649426
--- /dev/null
+++ b/backend/sftp/sftp_unix.go
@@ -0,0 +1,12 @@
+// +build !windows
+
+package sftp
+
+import (
+	"syscall"
+)
+
+func init() {
+	// ignore signals sent to the parent (e.g. SIGINT)
+	sysProcAttr = syscall.SysProcAttr{Setsid: true}
+}