Added exec-module

src/helper/exec.js

@@ -0,0 +1,22 @@
+const logger = require("./logger.js")("exec");
+
+const { spawn } = require("child_process");
+
+
+function exec(cmd, stdout_handler, stderr_handler, 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`);
+    stdout_handler && proc.stdout.on('data', stdout_handler);
+    stderr_handler && proc.stderr.on('data', stderr_handler);
+    exit_handler   && proc.on('exit', exit_handler);
+}
+
+// Specify exports
+module.exports = {
+    exec
+};