mirror of https://github.com/i3/i3lock.git
Bugfix: Don’t re-grab pointer/keyboard on MappingNotify (Thanks wilmer)
This fixes bug http://bugs.i3wm.org/545, where characters (of your password) would rarely slip through when entering your password (especially) after resuming your notebook from suspend to RAM. The reason is that when resuming, X triggers one or more MappingNotify events. At the same time, CPU load is high. This leads to a race-condition between the ungrab and re-grab in which i3lock temporarily does not grab the keyboard. One way to fix this is using xcb_grab_server() before and xcb_ungrab_server() after the ungrab/re-grab. However, I think we actually don’t need to ungrab/re-grab at all. I seem to have put that code in here by mistake – in i3, we re-grab after MappingNotify, but there we only grab specific keys. In i3lock, we grab the whole pointer/keyboard, so there should be no need. If I’m incorrect and this breaks some subtle use-cases for people with strange layout setup, at least we can properly document on why we need it, after we put it back in ;).pull/1/head
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493b02aa04
commit
a803ba931e
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i3lock.c
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i3lock.c
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@ -231,21 +231,14 @@ static void handle_visibility_notify(xcb_visibility_notify_event_t *event) {
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}
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/*
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* Called when the keyboard mapping changes. We update our symbols and re-grab
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* pointer/keyboard.
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* Called when the keyboard mapping changes. We update our symbols.
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*
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*/
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static void handle_mapping_notify(xcb_mapping_notify_event_t *event) {
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xcb_refresh_keyboard_mapping(symbols, event);
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xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
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xcb_ungrab_keyboard(conn, XCB_CURRENT_TIME);
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grab_pointer_and_keyboard(conn, scr, cursor);
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modeswitchmask = get_mod_mask(conn, symbols, XK_Mode_switch);
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numlockmask = get_mod_mask(conn, symbols, XK_Num_Lock);
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xcb_flush(conn);
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}
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/*
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