add ks-iam and ks-apigateway

Signed-off-by: hongming <talonwan@yunify.com>

vendor/github.com/docker/go-connections/sockets/unix_socket.go

@@ -1,5 +1,51 @@
 // +build !windows
 
+/*
+Package sockets is a simple unix domain socket wrapper.
+
+Usage
+
+For example:
+
+	import(
+		"fmt"
+		"net"
+		"os"
+		"github.com/docker/go-connections/sockets"
+	)
+
+	func main() {
+		l, err := sockets.NewUnixSocketWithOpts("/path/to/sockets",
+			sockets.WithChown(0,0),sockets.WithChmod(0660))
+		if err != nil {
+			panic(err)
+		}
+		echoStr := "hello"
+
+		go func() {
+			for {
+				conn, err := l.Accept()
+				if err != nil {
+					return
+				}
+				conn.Write([]byte(echoStr))
+				conn.Close()
+			}
+		}()
+
+		conn, err := net.Dial("unix", path)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		buf := make([]byte, 5)
+		if _, err := conn.Read(buf); err != nil {
+			panic(err)
+		} else if string(buf) != echoStr {
+			panic(fmt.Errorf("Msg may lost"))
+		}
+	}
+*/
 package sockets
 
 import (
@@ -8,8 +54,31 @@ import (
 	"syscall"
 )
 
-// NewUnixSocket creates a unix socket with the specified path and group.
-func NewUnixSocket(path string, gid int) (net.Listener, error) {
+// SockOption sets up socket file's creating option
+type SockOption func(string) error
+
+// WithChown modifies the socket file's uid and gid
+func WithChown(uid, gid int) SockOption {
+	return func(path string) error {
+		if err := os.Chown(path, uid, gid); err != nil {
+			return err
+		}
+		return nil
+	}
+}
+
+// WithChmod modifies socket file's access mode
+func WithChmod(mask os.FileMode) SockOption {
+	return func(path string) error {
+		if err := os.Chmod(path, mask); err != nil {
+			return err
+		}
+		return nil
+	}
+}
+
+// NewUnixSocketWithOpts creates a unix socket with the specified options
+func NewUnixSocketWithOpts(path string, opts ...SockOption) (net.Listener, error) {
 	if err := syscall.Unlink(path); err != nil && !os.IsNotExist(err) {
 		return nil, err
 	}
@@ -20,13 +89,18 @@ func NewUnixSocket(path string, gid int) (net.Listener, error) {
 	if err != nil {
 		return nil, err
 	}
-	if err := os.Chown(path, 0, gid); err != nil {
-		l.Close()
-		return nil, err
-	}
-	if err := os.Chmod(path, 0660); err != nil {
-		l.Close()
-		return nil, err
+
+	for _, op := range opts {
+		if err := op(path); err != nil {
+			l.Close()
+			return nil, err
+		}
 	}
+
 	return l, nil
 }
+
+// NewUnixSocket creates a unix socket with the specified path and group.
+func NewUnixSocket(path string, gid int) (net.Listener, error) {
+	return NewUnixSocketWithOpts(path, WithChown(0, gid), WithChmod(0660))
+}