1 files changed, 21 insertions, 0 deletions
diff --git a/src/main.zig b/src/main.zig
index 1511740..92067a4 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -26,6 +26,16 @@ fn parseCommand(input: []const u8) struct { name: []const u8, args: ?[]const u8
     };
 }
 
+fn isBuiltin(cmd_name: []const u8) bool {
+    const builtins = [_][]const u8{ "exit", "echo", "type" };
+    for (builtins) |builtin| {
+        if (std.mem.eql(u8, cmd_name, builtin)) {
+            return true;
+        }
+    }
+    return false;
+}
+
 fn executeCommand(cmd_name: []const u8, args: ?[]const u8) !CommandResult {
     if (std.mem.eql(u8, cmd_name, "exit")) {
         return .exit_shell;
@@ -40,6 +50,17 @@ fn executeCommand(cmd_name: []const u8, args: ?[]const u8) !CommandResult {
         return .continue_loop;
     }
 
+    if (std.mem.eql(u8, cmd_name, "type")) {
+        if (args) |a| {
+            if (isBuiltin(a)) {
+                try stdout.print("{s} is a shell builtin\n", .{a});
+            } else {
+                try stdout.print("{s}: not found\n", .{a});
+            }
+        }
+        return .continue_loop;
+    }
+
     // Command not found
     try stdout.print("{s}: command not found\n", .{cmd_name});
     return .continue_loop;