Windows: Add initialConsoleSize to process

Signed-off-by: John Howard <jhoward@microsoft.com>

config.md

@@ -95,6 +95,7 @@ See links for details about [mountvol](http://ss64.com/nt/mountvol.html) and [Se
 **`process`** (object, required) configures the container process.
 
 * **`terminal`** (bool, optional) specifies whether you want a terminal attached to that process, defaults to false.
+* **`initialConsoleSize`** (box, optional) specifies the initial console size of the terminal if attached.
 * **`cwd`** (string, required) is the working directory that will be set for the executable.
   This value MUST be an absolute path.
 * **`env`** (array of strings, optional) contains a list of variables that will be set in the process's environment prior to execution.
@@ -139,6 +140,10 @@ _Note: For Solaris, uid and gid specify the uid and gid of the process inside th
 ```json
 "process": {
     "terminal": true,
+    "initialConsoleSize": {
+        "height": 25,
+        "width": 80
+    },
     "user": {
         "uid": 1,
         "gid": 1,
@@ -174,6 +179,10 @@ _Note: For Solaris, uid and gid specify the uid and gid of the process inside th
 ```json
 "process": {
     "terminal": true,
+    "initialConsoleSize": {
+        "height": 25,
+        "width": 80
+    },
     "user": {
         "uid": 1,
         "gid": 1,

specs-go/config.go

@@ -31,6 +31,8 @@ type Spec struct {
 type Process struct {
 	// Terminal creates an interactive terminal for the container.
 	Terminal bool `json:"terminal,omitempty"`
+	// InitialConsoleSize contains the initial size of the console.
+	InitialConsoleSize Box `json:"initialConsoleSize"`
 	// User specifies user information for the process.
 	User User `json:"user"`
 	// Args specifies the binary and arguments for the application to execute.
@@ -64,6 +66,11 @@ type User struct {
 	AdditionalGids []uint32 `json:"additionalGids,omitempty" platform:"linux,solaris"`
 }
 
+type Box struct {
+	Height uint `json:"height"`
+	Width  uint `json:"width"`
+}
+
 // Root contains information about the container's root filesystem on the host.
 type Root struct {
 	// Path is the absolute path to the container's root filesystem.