diff --git a/clite/commands.js b/clite/commands.js
index 164f829..dfd01ba 100644
--- a/clite/commands.js
+++ b/clite/commands.js
@@ -2354,18 +2354,14 @@ Options:
 });
 
 if (window.location.protocol == 'file:')
-clite.commands.load('exp',function(args,env,io) {
-	var stdio = io.include('stdio');
-	var stdlib = io.include('stdlib');
+clite.commands.load('exp',`
+var stdio = io.include('stdio');
 
-	function main(argc,argv) {
-		stdio.printf('%d %d %d\n',stdlib.getuid(),stdlib.getgid(),io.pid);
-
-		return 0;
-	}
-
-	return main(args.length,args);
-});
+function main(argc,argv) {
+	stdio.printf('hello world\\n');
+	return 0;
+}
+`);
 
 // insert commands above this line
 }
diff --git a/clite/core.js b/clite/core.js
index 2d40af3..a7f50e5 100644
--- a/clite/core.js
+++ b/clite/core.js
@@ -345,7 +345,11 @@ cat /etc/greeting
 						if (!f)
 							return;
 						f.mode = clite.lib.modestr('-rwxr-xr-x');
-						f.data.content = fn;
+						if (typeof fn === 'string') {
+							f.data.content = new Function('args','env','io',fn+';return main(args.length,args);');
+						}else{
+							f.data.content = fn;
+						}
 						if (typeof suid === 'boolean' && suid == true)
 							f.mode |= clite.io.modes.S_ISUID;
 						if (typeof sgid === 'boolean' && sgid == true)
@@ -355,7 +359,11 @@ cat /etc/greeting
 						if (!f)
 							return;
 						f.mode = clite.lib.modestr('-rw-rw-r--');
-						f.data.content = 'function main'+fn.toString().substring(8);
+						if (typeof fn === 'string') {
+							f.data.content = fn;
+						}else{
+							f.data.content = fn.toString().substring(8);
+						}
 					}
 				}
 
@@ -1648,18 +1656,25 @@ clite.io = {
 					}
 				}
 			}
-			if (typeof fd.node.data.content != 'string')
-				return false;
-			if (typeof data != 'string')
-				return false;
-			if (fd.pos + data.length >= fd.node.data.content.length) {
-				fd.node.data.content = fd.node.data.content.substring(0,fd.pos)+data;
-				fd.pos = fd.node.data.content.length;
+			if (typeof data === 'function') {
+				if (typeof fd.node.data.content !== 'string' && typeof fd.node.data.content !== 'function')
+					return false;
+				fd.node.data.content = data;
+				fd.pos = 0;
 			}else{
-				var b = fd.node.data.content.substring(0,fd.pos);
-				var e = fd.node.data.content.substring(fd.pos+data.length);
-				fd.node.data.content = b+data+e;
-				fd.pos += data.length;
+				if (typeof fd.node.data.content != 'string')
+					return false;
+				if (typeof data != 'string')
+					return false;
+				if (fd.pos + data.length >= fd.node.data.content.length) {
+					fd.node.data.content = fd.node.data.content.substring(0,fd.pos)+data;
+					fd.pos = fd.node.data.content.length;
+				}else{
+					var b = fd.node.data.content.substring(0,fd.pos);
+					var e = fd.node.data.content.substring(fd.pos+data.length);
+					fd.node.data.content = b+data+e;
+					fd.pos += data.length;
+				}
 			}
 			fd.node.time.modify = clite.time.sec();
 			clite.vfs.saveFile(fd.path);