Re-add Feature#sysdef!

ext/hbsdctl.rb/hbsdctl.c

@@ -44,6 +44,28 @@ ffi_available_features(VALUE self)
   return features;
 }
 
+static VALUE
+ffi_reset(VALUE self, VALUE rb_feature, VALUE rb_path)
+{
+  VALUE rb_enable_flag, rb_disable_flag;
+  char *enable_flag, *disable_flag, *path;
+
+  rb_enable_flag = rb_funcall(rb_feature, rb_intern("enable"), 0);
+  rb_disable_flag = rb_funcall(rb_feature, rb_intern("disable"), 0);
+  Check_Type(rb_path, T_STRING);
+  Check_Type(rb_enable_flag, T_STRING);
+  Check_Type(rb_disable_flag, T_STRING);
+  path = RSTRING_PTR(rb_path);
+  enable_flag = RSTRING_PTR(rb_enable_flag);
+  disable_flag = RSTRING_PTR(rb_disable_flag);
+  if(hbsdcontrol_extattr_rm_attr(path, disable_flag) == 0 ||
+     hbsdcontrol_extattr_rm_attr(path, enable_flag) == 0) {
+    return Qtrue;
+  } else {
+    return Qfalse;
+  }
+}
+
 static VALUE
 feature_set(VALUE self, VALUE path, VALUE state)
 {
@@ -83,5 +105,6 @@ Init_hbsdctl(void)
   rb_define_const(rb_mControl, "Enable", INT2NUM(1));
   rb_define_singleton_method(rb_mFFI, "available_features", ffi_available_features, 0);
   rb_define_singleton_method(rb_mFFI, "library_version", ffi_library_version, 0);
+  rb_define_singleton_method(rb_mFFI, "reset!", ffi_reset, 2);
   rb_define_private_method(rb_cFeature, "set!", feature_set, 2);
 }

lib/bsd/control/feature.rb

@@ -40,6 +40,21 @@ module BSD::Control
       set!(path, BSD::Control::Disable)
     end
 
+    ##
+    # Restore system defaults.
+    #
+    # @param [String] path
+    #  The path to a file.
+    #
+    # @raise [BSD::Control::Error]
+    #  When the operation fails.
+    #
+    # @return [Boolean]
+    #  Returns true on success.
+    def sysdef!(path)
+      FFI.reset!(self, path)
+    end
+
     # @endgroup
 
     ##