void
ply_terminal_stop_watching_for_active_vt_change (ply_terminal_t *terminal,
ply_terminal_active_vt_changed_handler_t active_vt_changed_handler,
void *user_data)
{
ply_list_node_t *node;
if (!ply_terminal_is_vt (terminal))
return;
node = ply_list_get_first_node (terminal->vt_change_closures);
while (node != NULL) {
ply_terminal_active_vt_changed_closure_t *closure;
ply_list_node_t *next_node;
closure = ply_list_node_get_data (node);
next_node = ply_list_get_next_node (terminal->vt_change_closures, node);
if (closure->handler == active_vt_changed_handler &&
closure->user_data == user_data) {
free (closure);
ply_list_remove_node (terminal->vt_change_closures, node);
}
node = next_node;
}
}
void
ply_terminal_set_mode (ply_terminal_t *terminal,
ply_terminal_mode_t mode)
{
assert (terminal != NULL);
assert (mode == PLY_TERMINAL_MODE_TEXT || mode == PLY_TERMINAL_MODE_GRAPHICS);
if (!ply_terminal_is_vt (terminal))
return;
if (terminal->should_ignore_mode_changes)
return;
switch (mode) {
case PLY_TERMINAL_MODE_TEXT:
if (ioctl (terminal->fd, KDSETMODE, KD_TEXT) < 0)
return;
break;
case PLY_TERMINAL_MODE_GRAPHICS:
if (ioctl (terminal->fd, KDSETMODE, KD_GRAPHICS) < 0)
return;
break;
}
}
void
ply_terminal_watch_for_vt_changes (ply_terminal_t *terminal)
{
assert (terminal != NULL);
struct vt_mode mode = { 0 };
if (terminal->fd < 0)
return;
if (!ply_terminal_is_vt (terminal))
return;
if (terminal->is_watching_for_vt_changes)
return;
mode.mode = VT_PROCESS;
mode.relsig = SIGUSR1;
mode.acqsig = SIGUSR2;
if (ioctl (terminal->fd, VT_SETMODE, &mode) < 0)
return;
ply_event_loop_watch_signal (terminal->loop,
SIGUSR1,
(ply_event_handler_t)
on_leave_vt, terminal);
ply_event_loop_watch_signal (terminal->loop,
SIGUSR2,
(ply_event_handler_t)
on_enter_vt, terminal);
terminal->is_watching_for_vt_changes = true;
}
static bool
open_device (ply_renderer_backend_t *backend)
{
assert (backend != NULL);
assert (backend->device_name != NULL);
if (!load_driver (backend))
return false;
if (!ply_terminal_open (backend->terminal))
{
ply_trace ("could not open terminal: %m");
return false;
}
if (!ply_terminal_is_vt (backend->terminal))
{
ply_trace ("terminal is not a VT");
ply_terminal_close (backend->terminal);
return false;
}
ply_terminal_watch_for_active_vt_change (backend->terminal,
(ply_terminal_active_vt_changed_handler_t)
on_active_vt_changed,
backend);
return true;
}
void
ply_terminal_ignore_mode_changes (ply_terminal_t *terminal,
bool should_ignore)
{
if (!ply_terminal_is_vt (terminal))
return;
terminal->should_ignore_mode_changes = should_ignore;
}
bool
ply_terminal_deactivate_vt (ply_terminal_t *terminal)
{
int old_vt_number;
assert (terminal != NULL);
if (!ply_terminal_is_vt (terminal)) {
ply_trace ("terminal is not for a VT");
return false;
}
if (terminal->initial_vt_number < 0) {
ply_trace ("Don't know where to jump to");
return false;
}
if (terminal->initial_vt_number == terminal->vt_number) {
ply_trace ("can't deactivate initial VT");
return false;
}
/* Otherwise we'd close and free the terminal before handling the
* "leaving the VT" signal.
*/
ply_terminal_stop_watching_for_vt_changes (terminal);
old_vt_number = terminal->vt_number;
if (ply_terminal_is_active (terminal)) {
ply_trace ("Attempting to set active vt back to %d from %d",
terminal->initial_vt_number, old_vt_number);
if (!set_active_vt (terminal, terminal->initial_vt_number)) {
ply_trace ("Couldn't move console to initial vt: %m");
return false;
}
if (!wait_for_vt_to_become_active (terminal, terminal->initial_vt_number)) {
ply_trace ("Error while waiting for vt %d to become active: %m",
terminal->initial_vt_number);
return false;
}
} else {
ply_trace ("terminal for vt %d is inactive", terminal->vt_number);
}
if (!deallocate_vt (terminal, old_vt_number)) {
ply_trace ("couldn't deallocate vt %d: %m", old_vt_number);
return false;
}
return true;
}
void
ply_terminal_watch_for_active_vt_change (ply_terminal_t *terminal,
ply_terminal_active_vt_changed_handler_t active_vt_changed_handler,
void *user_data)
{
ply_terminal_active_vt_changed_closure_t *closure;
if (!ply_terminal_is_vt (terminal))
return;
closure = calloc (1, sizeof(*closure));
closure->handler = active_vt_changed_handler;
closure->user_data = user_data;
ply_list_append_data (terminal->vt_change_closures, closure);
}
bool
ply_terminal_open (ply_terminal_t *terminal)
{
ply_terminal_open_result_t open_result;
assert (terminal != NULL);
if (terminal->is_open) {
ply_trace ("terminal %s is already open", terminal->name);
return true;
}
ply_trace ("trying to open terminal '%s'", terminal->name);
open_result = ply_terminal_open_device (terminal);
if (open_result != PLY_TERMINAL_OPEN_RESULT_SUCCESS) {
ply_trace ("could not open %s : %m", terminal->name);
return false;
}
ply_terminal_refresh_geometry (terminal);
ply_terminal_look_up_color_palette (terminal);
ply_terminal_save_color_palette (terminal);
ply_event_loop_watch_signal (terminal->loop,
SIGWINCH,
(ply_event_handler_t)
ply_terminal_refresh_geometry,
terminal);
if (ply_terminal_is_vt (terminal)) {
ply_terminal_watch_for_vt_changes (terminal);
if (get_active_vt (terminal) == terminal->vt_number)
terminal->is_active = true;
else
terminal->is_active = false;
}
terminal->is_open = true;
return true;
}
bool
ply_terminal_activate_vt (ply_terminal_t *terminal)
{
assert (terminal != NULL);
if (!ply_terminal_is_vt (terminal))
return false;
if (terminal->is_active)
return true;
if (!set_active_vt (terminal, terminal->vt_number)) {
ply_trace ("unable to set active vt to %d: %m",
terminal->vt_number);
return false;
}
return true;
}
void
ply_terminal_stop_watching_for_vt_changes (ply_terminal_t *terminal)
{
struct vt_mode mode = { 0 };
if (!ply_terminal_is_vt (terminal))
return;
if (!terminal->is_watching_for_vt_changes)
return;
terminal->is_watching_for_vt_changes = false;
ply_event_loop_stop_watching_signal (terminal->loop, SIGUSR1);
ply_event_loop_stop_watching_signal (terminal->loop, SIGUSR2);
mode.mode = VT_AUTO;
ioctl (terminal->fd, VT_SETMODE, &mode);
}