Improved type definitions and provided test/types.ts to validate the …

…usage

index.d.ts

@@ -1,16 +1,16 @@
 /**
- * Kills `pid` and all its children
+ * Kills process identified by `pid` and all its children
  *
  * @param pid
  * @param signal 'SIGTERM' by default
- * @param callback Called when killing of the entire tree is done, and it's the result
- *   of the platform-specific killing command (see docs).
+ * @param callback
  */
 declare function treeKill(
     pid: number,
-    signal: string,
-    callback?: (error: Error, stdout: string, stderr: string) => void,
+    signal?: string | number,
+    callback?: (error?: Error) => void,
 ): void;
+
 declare namespace treeKill {}
 
 export = treeKill;

test/types.ts

@@ -0,0 +1,17 @@
+// examples of valid usage
+// importing just the type definitions, not the actual code
+import * as kill from '../index.d';
+
+
+kill(1);
+kill(1, 9);
+kill(1, 'SIGKILL');
+kill(1, 'SIGKILL', () => {
+    console.log('done');
+});
+kill(1, 'SIGKILL', (err) => {
+    if (err) {
+        console.log(err.message);
+    }
+    console.log('done');
+});