Fix compilation of Mesos minion on Mac

contrib/mesos/pkg/minion/tasks/task.go

@@ -214,10 +214,7 @@ func notStartedTask(t *Task) taskStateFn {
 	if len(t.env) > 0 {
 		cmd.Env = t.env
 	}
-	cmd.SysProcAttr = &syscall.SysProcAttr{
-		Setpgid:   true,
-		Pdeathsig: syscall.SIGKILL, // see cmdProcess.Kill
-	}
+	cmd.SysProcAttr = sysProcAttr()
 
 	// last min check for shouldQuit here
 	select {

contrib/mesos/pkg/minion/tasks/task_linux.go

+/*
+Copyright 2015 The Kubernetes Authors All rights reserved.
+
+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 tasks
+
+import (
+	"syscall"
+)
+
+func sysProcAttr() *syscall.SysProcAttr {
+	return &syscall.SysProcAttr{
+		Setpgid:   true,
+		Pdeathsig: syscall.SIGKILL, // see cmdProcess.Kill
+	}
+}

contrib/mesos/pkg/minion/tasks/task_other.go

+// +build !linux
+
+/*
+Copyright 2015 The Kubernetes Authors All rights reserved.
+
+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 tasks
+
+import (
+	"syscall"
+)
+
+func sysProcAttr() *syscall.SysProcAttr {
+	// TODO(jdef)
+	// Consequence of not having Pdeathdig is that on non-Linux systems,
+	// if SIGTERM doesn't stop child procs then they may "leak" and be
+	// reparented 'up the chain' somewhere when the minion process
+	// terminates. For example, such child procs end up living indefinitely
+	// as children of the mesos slave process (I think the slave could handle
+	// this case, but currently doesn't do it very well). Pdeathsig on Linux
+	// was a fallback/failsafe mechanism implemented to guard against this. I
+	// don't know if OS X has any syscalls that do something similar.
+	return &syscall.SysProcAttr{
+		Setpgid: true,
+	}
+}