Change exec to just return process and streams

src/helper/exec.js

@@ -3,17 +3,18 @@ const logger = require("./logger.js")("exec");
 const { spawn } = require("child_process");
 
 
-function exec(cmd, stdout_handler, stderr_handler, exit_handler){
+function exec(cmd, stdout, stderr, exit_handler){
     const [bin, ...args] = cmd.split(' ')
 
     logger.addContext("binary", "bin");
     logger.debug(`Spawn process '${cmd}'`);
     let proc = spawn(bin, args);
 
-    logger.debug(`Attach stdout, stderr and exit-handler if set`);
+    return {
-    stdout_handler && proc.stdout.on('data', stdout_handler);
+        "process": proc,
-    stderr_handler && proc.stderr.on('data', stderr_handler);
+        "stdout": proc.stdout,
-    exit_handler   && proc.on('exit', exit_handler);
+        "stderr": proc.stderr
+    }
 }
 
 // Specify exports