Rename to InitPid

Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@docker.com> (github: crosbymichael)

namespaces/exec.go

@@ -58,8 +58,8 @@ func Exec(container *libcontainer.Config, term Terminal, rootfs, dataPath string
 	}
 
 	state := &libcontainer.State{
-		Pid1:          command.Process.Pid,
-		Pid1StartTime: started,
+		InitPid:       command.Process.Pid,
+		InitStartTime: started,
 	}
 
 	if err := libcontainer.SaveState(dataPath, state); err != nil {

namespaces/execin.go

@@ -22,7 +22,7 @@ func ExecIn(container *libcontainer.Config, state *libcontainer.State, args []st
 	}
 
 	// Enter the namespace and then finish setup
-	finalArgs := []string{os.Args[0], "nsenter", "--nspid", strconv.Itoa(state.Pid1), "--containerjson", string(containerJson), "--"}
+	finalArgs := []string{os.Args[0], "nsenter", "--nspid", strconv.Itoa(state.InitPid), "--containerjson", string(containerJson), "--"}
 	finalArgs = append(finalArgs, args...)
 	if err := system.Execv(finalArgs[0], finalArgs[0:], os.Environ()); err != nil {
 		return err

state.go

@@ -8,10 +8,10 @@ import (
 
 // State represents a running container's state
 type State struct {
-	// Pid1 is the process id for the container's pid 1 in it's parent namespace
-	Pid1 int `json:"pid1,omitempty"`
-	// Pid1StartTime is the process start time for the container's pid 1
-	Pid1StartTime string `json:"pid1_start_time,omitempty"`
+	// InitPid is the init process id in the parent namespace
+	InitPid int `json:"init_pid,omitempty"`
+	// InitStartTime is the init process start time
+	InitStartTime string `json:"init_start_time,omitempty"`
 }
 
 // SaveState writes the container's runtime state to a state.json file