static inline Eina_Bool
_ecore_drm_logind_vt_get(Ecore_Drm_Device *dev)
{
int ret;
ret = sd_session_get_vt(dev->session, &dev->vt);
if (ret < 0)
{
ERR("Could not get systemd tty: %m");
return EINA_FALSE;
}
return EINA_TRUE;
}
static int
weston_sd_session_get_vt(const char *sid, unsigned int *out)
{
#ifdef HAVE_SYSTEMD_LOGIN_209
return sd_session_get_vt(sid, out);
#else
int r;
char *tty;
r = sd_session_get_tty(sid, &tty);
if (r < 0)
return r;
r = sscanf(tty, "tty%u", out);
free(tty);
if (r != 1)
return -EINVAL;
return 0;
#endif
}
static bool is_managed(const char *session) {
unsigned int vtnr;
struct stat st;
long mode;
int r;
/* Using logind's Controller API is highly fragile if there is already
* a session controller running. If it is registered as controller
* itself, TakeControl will simply fail. But if its a legacy controller
* that does not use logind's controller API, we must never register
* our own controller. Otherwise, we really mess up the VT. Therefore,
* only run in managed mode if there's no-one else. */
if (geteuid() == 0)
return false;
if (!isatty(1))
return false;
if (!session)
return false;
r = sd_session_get_vt(session, &vtnr);
if (r < 0 || vtnr < 1 || vtnr > 63)
return false;
mode = 0;
r = ioctl(1, KDGETMODE, &mode);
if (r < 0 || mode != KD_TEXT)
return false;
r = fstat(1, &st);
if (r < 0 || minor(st.st_rdev) != vtnr)
return false;
return true;
}
