libglnx is the successor to libgsystem: https://git.gnome.org/browse/libgsystem

It is for modules which depend on both GLib and Linux, intended to be used as a git submodule.

Porting from libgsystem

For all of the filesystem access code, libglnx exposes only fd-relative API, not GFile*. It does use GCancellable where applicable.

For local allocation macros, you should start using the g_auto macros from GLib. A backport is included in libglnx. There are a few APIs not defined in GLib yet, such as glnx_fd_close.

gs_transfer_out_value is replaced by g_steal_pointer.