int ioctl(int fd, unsigned long int request, ...) {
if (!orig_ioctl) preload_init();
int ret = 0;
va_list argp;
va_start(argp, request);
void* data = va_arg(argp, void*);
if (fd == tty0fd) {
TRACE("ioctl tty0 %d %lx %p\n", fd, request, data);
if (request == VT_OPENQRY) {
TRACE("OPEN\n");
*(int*)data = 7;
}
ret = 0;
} else if (fd == tty7fd) {
TRACE("ioctl tty7 %d %lx %p\n", fd, request, data);
if (request == VT_GETSTATE) {
TRACE("STATE\n");
struct vt_stat* stat = data;
stat->v_active = 0;
}
if ((request == VT_RELDISP && (long)data == 1) ||
(request == VT_ACTIVATE && (long)data == 0)) {
if (lockfd != -1) {
TRACE("Telling Chromium OS to regain control\n");
ret = FREON_DBUS_METHOD_CALL(TakeDisplayOwnership);
if (set_display_lock(0) < 0) {
ERROR("Failed to release display lock\n");
}
}
} else if ((request == VT_RELDISP && (long)data == 2) ||
(request == VT_ACTIVATE && (long)data == 7)) {
if (set_display_lock(getpid()) == 0) {
TRACE("Telling Chromium OS to drop control\n");
ret = FREON_DBUS_METHOD_CALL(ReleaseDisplayOwnership);
} else {
ERROR("Unable to claim display lock\n");
ret = -1;
}
drm_disable_cursor();
} else {
ret = 0;
}
} else {
if (request == EVIOCGRAB) {
TRACE("ioctl GRAB %d %lx %p\n", fd, request, data);
/* Driver requested a grab: assume we have it already and report
* success */
ret = 0;
} else {
ret = orig_ioctl(fd, request, data);
}
}
va_end(argp);
return ret;
}
int open64(const char *pathname, int flags, ...) {
if (!orig_open64) preload_init();
va_list argp;
va_start(argp, flags);
mode_t mode = va_arg(argp, mode_t);
va_end(argp);
return _open(orig_open64, "open64", pathname, flags, mode);
}
int close(int fd) {
if (!orig_close) preload_init();
TRACE("close %d\n", fd);
if (fd == tty0fd) {
tty0fd = -1;
} else if (fd == tty7fd) {
tty7fd = -1;
}
return orig_close(fd);
}
/* Prevents some glitch if Chromium OS keeps cursor enabled (#2878). */
static void drm_disable_cursor()
{
int i, fd;
drmModeRes* resources;
if (!orig_open) preload_init();
fd = orig_open("/dev/dri/card0", O_RDWR, 0);
TRACE("%s %d\n", __func__, fd);
if (fd < 0)
return;
resources = drmModeGetResources(fd);
if (!resources)
goto closefd;
TRACE("%s res=%p\n", __func__, resources);
for (i = 0; i < resources->count_crtcs; i++) {
drmModeCrtc* crtc;
crtc = drmModeGetCrtc(fd, resources->crtcs[i]);
TRACE("%s crtc %d %p\n", __func__, i, crtc);
if (crtc) {
drmModeSetCursor(fd, crtc->crtc_id,
0, 0, 0);
drmModeFreeCrtc(crtc);
}
}
drmModeFreeResources(resources);
closefd:
orig_close(fd);
}
