fix: bin/save

buildroot-v86/board/v86/rootfs_overlay/root/bin/save

@@ -19,15 +19,20 @@ state(){
 file(){
   javascript='
 
-    filename='$1'
+    filename="'$(pwd)/$1'"
+    res = ""
 
-    function saveUint8Array(uint8Array, filename = 'download.bin', mimeType = 'application/octet-stream') {
+    function saveUint8Array(uint8Array, filename = "download.bin", mimeType = "application/octet-stream") {
+      if( !uint8Array ){ 
+        console.log( res = "file not found" )
+        return false
+      }
       const blob = new Blob([uint8Array], { type: mimeType });
       const url = URL.createObjectURL(blob);
 
-      const a = document.createElement('a');
+      const a = document.createElement("a");
       a.href = url;
-      a.download = filename;
+      a.download = filename.replace(/.*\//,"");
 
       // Programmatically trigger the click event
       document.body.appendChild(a);
@@ -39,9 +44,9 @@ file(){
     }
 
     let term = document.querySelector("[isoterminal]")
-    term.emit("read_file", [filename, (str,buf) > saveUint8Array(buf, filename) )
+    term.emit("read_file", [filename, (str,buf) => saveUint8Array(buf, filename) ] )
   
-    return ""
+    return res
   '
   hook save
   js "$javascript"
@@ -49,5 +54,5 @@ file(){
 }
 
 test -z "$1" && state
-test -n "$1" && file
+test -n "$1" && file "$1"
 echo "Usage: save [file]      # pass no argument to save VM state to localStorage"