diff --git a/src/util.zig b/src/util.zig
index aef7ac3..40b3a97 100644
--- a/src/util.zig
+++ b/src/util.zig
@@ -1,9 +1,14 @@
+const std = @import("std");
+
 pub const IPs = struct {
     v4: [:0]const u8,
     v6: [:0]const u8,
 };
 
-pub fn check_perms() !void {}
+pub fn check_perms() !void {
+    var f = try std.fs.openFileAbsolute("/etc/hosts", .{ .mode = .write_only });
+    f.close();
+}
 
 pub fn get_input() ![:0]const u8 {
     return "stub";