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xwayland/server: add start signal
This can be used to know when wlr_xwayland_server decides to start a new Xwayland process. At that point the wl_client has already been created but the Xwayland process hasn't been started yet.
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@ -41,6 +41,7 @@ struct wlr_xwayland_server {
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struct wl_display *wl_display;
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struct {
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struct wl_signal start;
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struct wl_signal ready;
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struct wl_signal destroy;
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} events;
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@ -365,6 +365,8 @@ static bool server_start(struct wlr_xwayland_server *server) {
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server->pipe_source = wl_event_loop_add_fd(loop, notify_fd[0],
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WL_EVENT_READABLE, xserver_handle_ready, server);
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wl_signal_emit_mutable(&server->events.start, NULL);
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server->pid = fork();
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if (server->pid < 0) {
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wlr_log_errno(WLR_ERROR, "fork failed");
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@ -460,6 +462,7 @@ struct wlr_xwayland_server *wlr_xwayland_server_create(
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server->wl_fd[0] = server->wl_fd[1] = -1;
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server->wm_fd[0] = server->wm_fd[1] = -1;
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wl_signal_init(&server->events.start);
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wl_signal_init(&server->events.ready);
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wl_signal_init(&server->events.destroy);
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