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backend/x11 & backend/wayland: make set_title NULL-safe

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Set the default "wlroots - " title when the title argument to the
set_title functions is NULL. Otherwise, for at least the Wayland
backend, we'd crash because xdg_toplevel_set_title doesn't handle a NULL
pointer.
This commit is contained in:
Jente Hidskes 2019-01-24 13:48:26 +01:00
parent 4cb0697e57
commit 85d84a1a04
No known key found for this signature in database
GPG key ID: 04BE5A29F32D91EA
2 changed files with 19 additions and 8 deletions
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14
backend/wayland/output.c
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@ -314,10 +314,7 @@ struct wlr_output *wlr_wl_output_create(struct wlr_backend *wlr_backend) {
goto error;
}
char title[32];
if (snprintf(title, sizeof(title), "wlroots - %s", wlr_output->name)) {
xdg_toplevel_set_title(output->xdg_toplevel, title);
}
wlr_wl_output_set_title(wlr_output, NULL);
xdg_toplevel_set_app_id(output->xdg_toplevel, "wlroots");
xdg_surface_add_listener(output->xdg_surface,
@ -369,5 +366,14 @@ error:
void wlr_wl_output_set_title(struct wlr_output *output, const char *title) {
struct wlr_wl_output *wl_output = get_wl_output_from_output(output);
char wl_title[32];
if (title == NULL) {
if (snprintf(wl_title, sizeof(wl_title), "wlroots - %s", output->name) <= 0) {
return;
}
title = wl_title;
}
xdg_toplevel_set_title(wl_output->xdg_toplevel, title);
}

13
backend/x11/output.c
View file

@ -185,10 +185,7 @@ struct wlr_output *wlr_x11_output_create(struct wlr_backend *backend) {
x11->atoms.wm_protocols, XCB_ATOM_ATOM, 32, 1,
&x11->atoms.wm_delete_window);
char title[32];
if (snprintf(title, sizeof(title), "wlroots - %s", wlr_output->name)) {
wlr_x11_output_set_title(wlr_output, title);
}
wlr_x11_output_set_title(wlr_output, NULL);
xcb_map_window(x11->xcb, output->win);
xcb_flush(x11->xcb);
@ -236,6 +233,14 @@ bool wlr_output_is_x11(struct wlr_output *wlr_output) {
void wlr_x11_output_set_title(struct wlr_output *output, const char *title) {
struct wlr_x11_output *x11_output = get_x11_output_from_output(output);
char wl_title[32];
if (title == NULL) {
if (snprintf(wl_title, sizeof(wl_title), "wlroots - %s", output->name) <= 0) {
return;
}
title = wl_title;
}
xcb_change_property(x11_output->x11->xcb, XCB_PROP_MODE_REPLACE, x11_output->win,
x11_output->x11->atoms.net_wm_name, x11_output->x11->atoms.utf8_string, 8,
strlen(title), title);