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tty: Put console in K_OFF mode

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This disables all kernel key bindings (VT switch keybindings, caps lock
etc) and disables delivery of console input.
This commit is contained in:
Kristian Høgsberg
2012-04-10 00:18:33 -04:00
parent 5d1c0c58ad
commit eeb2e50a76
1 changed files with 13 additions and 22 deletions
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src/tty.c
+13 -22
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@@ -39,10 +39,10 @@ struct tty {
int fd; int fd;
struct termios terminal_attributes; struct termios terminal_attributes;
struct wl_event_source *input_source;
struct wl_event_source *vt_source; struct wl_event_source *vt_source;
tty_vt_func_t vt_func; tty_vt_func_t vt_func;
int vt, starting_vt, has_vt; int vt, starting_vt, has_vt;
int kb_mode;
}; };
static int vt_handler(int signal_number, void *data) static int vt_handler(int signal_number, void *data)
@@ -64,18 +64,6 @@ static int vt_handler(int signal_number, void *data)
return 1; return 1;
} }
static int
on_tty_input(int fd, uint32_t mask, void *data)
{
struct tty *tty = data;
/* Ignore input to tty. We get keyboard events from evdev
*/
tcflush(tty->fd, TCIFLUSH);
return 1;
}
static int static int
try_open_vt(struct tty *tty) try_open_vt(struct tty *tty)
{ {
@@ -186,17 +174,17 @@ tty_create(struct weston_compositor *compositor, tty_vt_func_t vt_func,
if (tcsetattr(tty->fd, TCSANOW, &raw_attributes) < 0) if (tcsetattr(tty->fd, TCSANOW, &raw_attributes) < 0)
fprintf(stderr, "could not put terminal into raw mode: %m\n"); fprintf(stderr, "could not put terminal into raw mode: %m\n");
loop = wl_display_get_event_loop(compositor->wl_display); ioctl(tty->fd, KDGKBMODE, &tty->kb_mode);
tty->input_source = ret = ioctl(tty->fd, KDSKBMODE, K_OFF);
wl_event_loop_add_fd(loop, tty->fd, if (ret) {
WL_EVENT_READABLE, on_tty_input, tty); fprintf(stderr, "failed to set K_OFF keyboard mode on tty: %m\n");
if (!tty->input_source)
goto err_attr; goto err_attr;
}
ret = ioctl(tty->fd, KDSETMODE, KD_GRAPHICS); ret = ioctl(tty->fd, KDSETMODE, KD_GRAPHICS);
if (ret) { if (ret) {
fprintf(stderr, "failed to set KD_GRAPHICS mode on tty: %m\n"); fprintf(stderr, "failed to set KD_GRAPHICS mode on tty: %m\n");
goto err_input_source; goto err_kdkbmode;
} }
tty->has_vt = 1; tty->has_vt = 1;
@@ -208,6 +196,7 @@ tty_create(struct weston_compositor *compositor, tty_vt_func_t vt_func,
goto err_kdmode; goto err_kdmode;
} }
loop = wl_display_get_event_loop(compositor->wl_display);
tty->vt_source = tty->vt_source =
wl_event_loop_add_signal(loop, SIGUSR1, vt_handler, tty); wl_event_loop_add_signal(loop, SIGUSR1, vt_handler, tty);
if (!tty->vt_source) if (!tty->vt_source)
@@ -221,8 +210,8 @@ err_vtmode:
err_kdmode: err_kdmode:
ioctl(tty->fd, KDSETMODE, KD_TEXT); ioctl(tty->fd, KDSETMODE, KD_TEXT);
err_input_source: err_kdkbmode:
wl_event_source_remove(tty->input_source); ioctl(tty->fd, KDSKBMODE, tty->kb_mode);
err_attr: err_attr:
tcsetattr(tty->fd, TCSANOW, &tty->terminal_attributes); tcsetattr(tty->fd, TCSANOW, &tty->terminal_attributes);
@@ -241,6 +230,9 @@ tty_destroy(struct tty *tty)
if(!tty) if(!tty)
return; return;
if (ioctl(tty->fd, KDSKBMODE, tty->kb_mode))
fprintf(stderr, "failed to restore keyboard mode: %m\n");
if (ioctl(tty->fd, KDSETMODE, KD_TEXT)) if (ioctl(tty->fd, KDSETMODE, KD_TEXT))
fprintf(stderr, fprintf(stderr,
"failed to set KD_TEXT mode on tty: %m\n"); "failed to set KD_TEXT mode on tty: %m\n");
@@ -258,7 +250,6 @@ tty_destroy(struct tty *tty)
ioctl(tty->fd, VT_WAITACTIVE, tty->starting_vt); ioctl(tty->fd, VT_WAITACTIVE, tty->starting_vt);
} }
wl_event_source_remove(tty->input_source);
wl_event_source_remove(tty->vt_source); wl_event_source_remove(tty->vt_source);
close(tty->fd); close(tty->fd);