From 3e6964b841bb22c4eab4cdaa22655beeae577419 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C3=A9ter=20Szil=C3=A1gyi?= <peterke@gmail.com>
Date: Fri, 11 Sep 2015 17:03:31 +0300
Subject: [PATCH] rpc/comms: fix #1795, ensure IPC path exists before binding

---
 rpc/comms/ipc_unix.go | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/rpc/comms/ipc_unix.go b/rpc/comms/ipc_unix.go
index 9d90da071..d68363a45 100644
--- a/rpc/comms/ipc_unix.go
+++ b/rpc/comms/ipc_unix.go
@@ -21,6 +21,7 @@ package comms
 import (
 	"net"
 	"os"
+	"path/filepath"
 
 	"github.com/ethereum/go-ethereum/logger"
 	"github.com/ethereum/go-ethereum/logger/glog"
@@ -69,7 +70,11 @@ func (self *ipcClient) reconnect() error {
 }
 
 func startIpc(cfg IpcConfig, codec codec.Codec, initializer func(conn net.Conn) (shared.EthereumApi, error)) error {
-	os.Remove(cfg.Endpoint) // in case it still exists from a previous run
+	// Ensure the IPC path exists and remove any previous leftover
+	if err := os.MkdirAll(filepath.Dir(cfg.Endpoint), 0751); err != nil {
+		return err
+	}
+	os.Remove(cfg.Endpoint)
 
 	l, err := net.ListenUnix("unix", &net.UnixAddr{Name: cfg.Endpoint, Net: "unix"})
 	if err != nil {