Sorry for that double post. It was already solved by Emmanuel.
Fre;D ________________________________ De : wayland-devel <wayland-devel-boun...@lists.freedesktop.org> de la part de Fred vS <fi...@hotmail.com> Envoyé : mercredi 4 octobre 2023 20:14 À : wayland-devel@lists.freedesktop.org <wayland-devel@lists.freedesktop.org> Objet : Problem with mmap keyboard. Hello. I try to make work the "Keyboard event" step from the Wayland-book but the C demo crash at loading. The problem comes from the mapping: with that error: Line 301: wl_keyboard_keymap: Assertion map_shm != MAP_FAILED' failed. Here is the function: static void wl_keyboard_keymap(void *data, struct wl_keyboard *wl_keyboard, uint32_t format, int32_t fd, uint32_t size) { struct client_state *client_state = data; assert(format == WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1); // Line 301: Here problem with mapping char *map_shm = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0); assert(map_shm != MAP_FAILED); struct xkb_keymap *xkb_keymap = xkb_keymap_new_from_string( client_state->xkb_context, map_shm, XKB_KEYMAP_FORMAT_TEXT_V1, XKB_KEYMAP_COMPILE_NO_FLAGS); munmap(map_shm, size); close(fd); struct xkb_state *xkb_state = xkb_state_new(xkb_keymap); xkb_keymap_unref(client_state->xkb_keymap); xkb_state_unref(client_state->xkb_state); client_state->xkb_keymap = xkb_keymap; client_state->xkb_state = xkb_state; } Why does the mapping fails, I did check fd and size and they are correctly assigned? Thanks.