Implement almost all of sd-daemon. BREAKING CHANGES.v0.2.0

This does not include the sd_is_* utility functions.

BREAKING CHANGES:
 - The import name is now "sd_daemon" instead of "sd".
 - The logger interface is now entirely different.
 - Notify now takes more arguments.

1 files changed, 28 insertions, 0 deletions

diff --git a/sd_daemon/booted.go b/sd_daemon/booted.go
new file mode 100644
index 0000000..bfbc685
--- /dev/null
+++ b/sd_daemon/booted.go
@@ -0,0 +1,28 @@
+// Copyright 2015 CoreOS, Inc.
+// Copyright 2016 Luke Shumaker
+//
+// 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_daemon
+
+import "os"
+
+// Returns whether the operating system booted using the Systemd init
+// system.
+//
+// Please do not use this function.  All of the other functionality in
+// this package uses interfaces that are not Systemd-specific.
+func SdBooted() bool {
+	fi, err := os.Lstat("/run/systemd/system")
+	return err != nil && fi.IsDir()
+}