feat: lib.go redirects stdout to Output

cmd/lib.go

@@ -10,7 +10,10 @@ package main
 import "C"
 
 import (
+	"bytes"
 	"encoding/csv"
+	"io"
+	"os"
 	"rpc/pkg/utils"
 	"strings"
 
@@ -28,6 +31,11 @@ func rpcCheckAccess() int {
 
 //export rpcExec
 func rpcExec(Input *C.char, Output **C.char) int {
+	// Save the current stdout and redirect temporarly
+	oldStdout := os.Stdout
+	rd, w, _ := os.Pipe()
+	os.Stdout = w
+
 	if accessStatus := rpcCheckAccess(); accessStatus != int(utils.Success) {
 		*Output = C.CString(AccessErrMsg)
 		return accessStatus
@@ -49,6 +57,14 @@ func rpcExec(Input *C.char, Output **C.char) int {
 		*Output = C.CString("rpcExec failed: " + inputString)
 		return handleError(err)
 	}
+
+	// Save captured output to Output variable and restore stdout
+	w.Close()
+	var buf bytes.Buffer
+	io.Copy(&buf, rd)
+	os.Stdout = oldStdout
+	*Output = C.CString(buf.String())
+
 	return int(utils.Success)
 }