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X11_InitKeyboard: do not call XAutoRepeatOn unnecessarily

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Use XGetKeyboardControl to initialize the current XKeyboardState, and
skip XAutoRepeatOn invocation if global_auto_repeat is AutoRepeatModeOn.

This fixes SDL2 when the X11 client is untrusted.
This commit is contained in:
Dmitry V. Levin 2020-01-04 11:05:06 -08:00
parent ed514cd0e4
commit 2b1edf4113
2 changed files with 5 additions and 1 deletions
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5
src/video/x11/SDL_x11keyboard.c
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@ -267,8 +267,11 @@ X11_InitKeyboard(_THIS)
int best_index;
int distance;
Bool xkb_repeat = 0;
XKeyboardState values = { .global_auto_repeat = AutoRepeatModeOff };
X11_XAutoRepeatOn(data->display);
X11_XGetKeyboardControl(data->display, &values);
if (values.global_auto_repeat != AutoRepeatModeOn)
X11_XAutoRepeatOn(data->display);
#if SDL_VIDEO_DRIVER_X11_HAS_XKBKEYCODETOKEYSYM
{

1
src/video/x11/SDL_x11sym.h
View file

@ -72,6 +72,7 @@ SDL_X11_SYM(char*,XGetAtomName,(Display *a,Atom b),(a,b),return)
SDL_X11_SYM(int,XGetInputFocus,(Display *a,Window *b,int *c),(a,b,c),return)
SDL_X11_SYM(int,XGetErrorDatabaseText,(Display* a,_Xconst char* b,_Xconst char* c,_Xconst char* d,char* e,int f),(a,b,c,d,e,f),return)
SDL_X11_SYM(XModifierKeymap*,XGetModifierMapping,(Display* a),(a),return)
SDL_X11_SYM(int,XGetKeyboardControl,(Display* a, XKeyboardState* b),(a,b),return)
SDL_X11_SYM(int,XGetPointerControl,(Display* a,int* b,int* c,int* d),(a,b,c,d),return)
SDL_X11_SYM(Window,XGetSelectionOwner,(Display* a,Atom b),(a,b),return)
SDL_X11_SYM(XVisualInfo*,XGetVisualInfo,(Display* a,long b,XVisualInfo* c,int* d),(a,b,c,d),return)