Add config param for unix socket permission (issue #203)

config/config.go

@@ -97,6 +97,8 @@ type Config struct {
 
 	Addr string `toml:"addr"`
 
+	AddrUnixSocketPerm string `toml:"addr_unixsocketperm"`
+
 	HttpAddr string `toml:"http_addr"`
 
 	SlaveOf string `toml:"slaveof"`

config/config.toml

@@ -3,6 +3,10 @@
 # Server listen address
 addr = "127.0.0.1:6380"
 
+# Unix socket permissions, 755 by default.
+# Ignored for tcp socket.
+addr_unixsocketperm = "0770"
+
 # Server http listen address, set empty to disable
 http_addr = "127.0.0.1:11181"
 

server/app.go

@@ -3,7 +3,9 @@ package server
 import (
 	"net"
 	"net/http"
+	"os"
 	"path"
+	"strconv"
 	"strings"
 	"sync"
 
@@ -86,10 +88,22 @@ func NewApp(cfg *config.Config) (*App, error) {
 		return nil, err
 	}
 
-	if app.listener, err = net.Listen(netType(cfg.Addr), cfg.Addr); err != nil {
+	addrNetType := netType(cfg.Addr)
+
+	if app.listener, err = net.Listen(addrNetType, cfg.Addr); err != nil {
 		return nil, err
 	}
 
+	if addrNetType == "unix" && len(cfg.AddrUnixSocketPerm) > 0 {
+		var perm int64
+		if perm, err = strconv.ParseInt(cfg.AddrUnixSocketPerm, 8, 32); err != nil {
+			return nil, err
+		}
+		if err = os.Chmod(cfg.Addr, os.FileMode(uint32(perm))); err != nil {
+			return nil, err
+		}
+	}
+
 	if len(cfg.HttpAddr) > 0 {
 		if app.httpListener, err = net.Listen(netType(cfg.HttpAddr), cfg.HttpAddr); err != nil {
 			return nil, err