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dummy: Only initialize evdev input devices in the evdev driver

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This avoids some misleading error messages when running unit tests with
the dummy driver: on a typical desktop Linux system, it's normal for
opening keyboards and mouse in `/dev/input/*` to fail with `EACCES`,
and in container technologies that share `/sys` but not `/dev` with the
container, we can find that we fail to open them with `ENOENT`.

Resolves: https://github.com/libsdl-org/SDL/issues/14872
Signed-off-by: Simon McVittie <smcv@collabora.com>
This commit is contained in:
Simon McVittie
2026-01-20 12:21:42 +00:00
committed by Sam Lantinga
parent b1362f8a42
commit 9ceb982a63
1 changed files with 33 additions and 13 deletions
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46
src/video/dummy/SDL_nullvideo.c
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@@ -52,8 +52,13 @@
#define DUMMYVID_DRIVER_EVDEV_NAME "evdev"
// Initialization/Query functions
static bool DUMMY_VideoInitCommon(SDL_VideoDevice *_this);
static bool DUMMY_VideoInit(SDL_VideoDevice *_this);
static void DUMMY_VideoQuit(SDL_VideoDevice *_this);
#ifdef SDL_INPUT_LINUXEV
static bool DUMMY_EVDEV_VideoInit(SDL_VideoDevice *_this);
static void DUMMY_EVDEV_VideoQuit(SDL_VideoDevice *_this);
#endif
static bool DUMMY_SetWindowPosition(SDL_VideoDevice *_this, SDL_Window *window)
{
@@ -125,6 +130,21 @@ VideoBootStrap DUMMY_bootstrap = {
#ifdef SDL_INPUT_LINUXEV
static bool DUMMY_EVDEV_VideoInit(SDL_VideoDevice *_this)
{
if (!DUMMY_VideoInitCommon(_this)) {
return false;
}
SDL_EVDEV_Init();
return true;
}
static void DUMMY_EVDEV_VideoQuit(SDL_VideoDevice *_this)
{
SDL_EVDEV_Quit();
}
static void DUMMY_EVDEV_Poll(SDL_VideoDevice *_this)
{
(void)_this;
@@ -135,6 +155,8 @@ static SDL_VideoDevice *DUMMY_EVDEV_CreateDevice(void)
{
SDL_VideoDevice *device = DUMMY_InternalCreateDevice(DUMMYVID_DRIVER_EVDEV_NAME);
if (device) {
device->VideoInit = DUMMY_EVDEV_VideoInit;
device->VideoQuit = DUMMY_EVDEV_VideoQuit;
device->PumpEvents = DUMMY_EVDEV_Poll;
}
return device;
@@ -147,16 +169,14 @@ VideoBootStrap DUMMY_evdev_bootstrap = {
false
};
#else
#endif // SDL_INPUT_LINUXEV
static bool DUMMY_SetRelativeMouseMode(bool enabled)
{
return true;
}
#endif // SDL_INPUT_LINUXEV
bool DUMMY_VideoInit(SDL_VideoDevice *_this)
bool DUMMY_VideoInitCommon(SDL_VideoDevice *_this)
{
SDL_DisplayMode mode;
@@ -169,21 +189,21 @@ bool DUMMY_VideoInit(SDL_VideoDevice *_this)
return false;
}
#ifdef SDL_INPUT_LINUXEV
SDL_EVDEV_Init();
#else
SDL_GetMouse()->SetRelativeMouseMode = DUMMY_SetRelativeMouseMode;
#endif
return true;
}
// We're done!
bool DUMMY_VideoInit(SDL_VideoDevice *_this)
{
if (!DUMMY_VideoInitCommon(_this)) {
return false;
}
SDL_GetMouse()->SetRelativeMouseMode = DUMMY_SetRelativeMouseMode;
return true;
}
void DUMMY_VideoQuit(SDL_VideoDevice *_this)
{
#ifdef SDL_INPUT_LINUXEV
SDL_EVDEV_Quit();
#endif
}
#endif // SDL_VIDEO_DRIVER_DUMMY