1 files changed, 51 insertions, 0 deletions
diff --git a/sd_login/util_syscall.go b/sd_login/util_syscall.go
new file mode 100644
index 0000000..f3d12a8
--- /dev/null
+++ b/sd_login/util_syscall.go
@@ -0,0 +1,51 @@
+// Copyright (C) 2015-2017 Luke Shumaker <lukeshu@sbcglobal.net>
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package sd_login
+
+import (
+	"net"
+
+	"golang.org/x/sys/unix"
+)
+
+const (
+	// from <linux/magic.h>
+	magic_TMPFS         = 0x01021994
+	magic_CGROUP_SUPER  = 0x0027e0eb
+	magic_CGROUP2_SUPER = 0x63677270 // "cgrp"
+)
+
+const (
+	// POSIX says at least 255, but Linux isn't POSIX.
+	host_name_max = 64
+)
+
+// I borrowed this from libnslcd.git/nslcd_systemd (of which I am the
+// author) -- lukeshu
+func getpeercred(conn *net.UnixConn) (cred unix.Ucred, err error) {
+	file, err := conn.File()
+	if err != nil {
+		return
+	}
+	defer file.Close()
+	_cred, err := unix.GetsockoptUcred(int(file.Fd()), unix.SOL_SOCKET, unix.SO_PEERCRED)
+	cred = *_cred
+	return
+}
+
+func statfs(fspath string) (fs unix.Statfs_t, err error) {
+	err = unix.Statfs(fspath, &fs)
+	return
+}