ray
63 lines
1.9 KiB
C
63 lines
1.9 KiB
C
/*
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* LD_PRELOAD shim for Sunshine on kernel 7.0+.
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*
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* PROBLEM: Kernel 7.0 (confirmed: 7.0.0-22-generic) requires UI_DEV_SETUP ioctl
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* BEFORE UI_DEV_CREATE on /dev/uinput. The old write()+UI_DEV_CREATE sequence
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* and bare UI_DEV_CREATE both fail with EINVAL. Sunshine links against
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* libevdev which uses the old method. Result: keyboard and mouse input silently
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* fail (Sunshine receives Moonlight packets but can't inject into X11).
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*
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* FIX: This shim overrides libevdev_uinput_create_from_device() to use the
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* correct UI_DEV_SETUP + UI_DEV_CREATE sequence.
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*
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* COMPILE: gcc -shared -fPIC -o uinput_fix.so uinput-shim.c -ldl
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*
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* DEPLOY:
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* 1. cp uinput_fix.so ~/.config/sunshine/uinput_fix.so
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* 2. Add to Sunshine systemd override:
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* [Service]
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* Environment=LD_PRELOAD=/home/ray/.config/sunshine/uinput_fix.so
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* 3. systemctl --user daemon-reload
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* 4. systemctl --user restart sunshine
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*
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* VERIFY: After connecting Moonlight, check that input events are created:
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* grep "keyboard packet" ~/.config/sunshine/sunshine.log | tail -5
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* # Should see packets arriving, AND keyboard/mouse now works on client.
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*/
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#define _GNU_SOURCE
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <dlfcn.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#include <linux/uinput.h>
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int libevdev_uinput_create_from_device(void *dev, int flags, int *uifd) {
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int fd = open("/dev/uinput", O_WRONLY);
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if (fd < 0) { return -errno; }
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struct uinput_setup usetup;
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memset(&usetup, 0, sizeof(usetup));
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usetup.id.bustype = BUS_USB;
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usetup.id.vendor = 0x1234;
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usetup.id.product = 0x5678;
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strncpy(usetup.name, "Sunshine Keyboard", UINPUT_MAX_NAME_SIZE-1);
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if (ioctl(fd, UI_DEV_SETUP, &usetup) < 0) {
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close(fd);
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return -errno;
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}
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if (ioctl(fd, UI_DEV_CREATE) < 0) {
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close(fd);
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return -errno;
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}
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*uifd = fd;
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return 0;
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}
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