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Ignore tty input

Browse source 
Previously, ctrl-c would kill wayland and input like
passwords and commands would get typed into the terminal
under the scenes.
This commit is contained in:
Ray Strode 2008-12-19 14:28:02 -05:00 • committed by Kristian Høgsberg
parent 2c0e56b2d5
commit 966aa112e7
1 changed files with 75 additions and 3 deletions
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76
wayland-system-compositor.c
View file

@ -18,9 +18,11 @@
#include <stdio.h>
#include <string.h>
#include <stdbool.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdarg.h>
#include <termios.h>
#include <i915_drm.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
@ -74,13 +76,19 @@ struct egl_compositor {
EGLContext context;
EGLConfig config;
struct wl_display *wl_display;
int tty_fd;
int width, height, stride;
struct egl_surface *background;
struct wl_list input_device_list;
struct wl_list surface_list;
struct wl_event_source *term_signal_source;
/* tty handling state */
int tty_fd;
struct termios terminal_attributes;
struct wl_event_source *tty_input_source;
struct wl_event_source *enter_vt_source;
struct wl_event_source *leave_vt_source;
@ -863,11 +871,72 @@ static void on_leave_vt(int signal_number, void *data)
ioctl (ec->tty_fd, VT_RELDISP, 1);
}
static bool open_active_tty(struct egl_compositor *ec)
{
ec->tty_fd = open("/dev/tty0", O_RDWR | O_NOCTTY);
if (ec->tty_fd <= 0) {
fprintf(stderr, "failed to open active tty: %m\n");
return FALSE;
}
return TRUE;
}
static void
on_tty_input(int fd, uint32_t mask, void *data)
{
struct egl_compositor *ec = data;
/* Ignore input to tty. We get keyboard events from evdev
*/
tcflush(ec->tty_fd, TCIFLUSH);
}
static void on_term_signal(int signal_number, void *data)
{
struct egl_compositor *ec = data;
if (tcsetattr(ec->tty_fd, TCSANOW, &ec->terminal_attributes) < 0)
fprintf(stderr, "could not restore terminal to canonical mode\n");
exit(0);
}
static void ignore_tty_input(struct egl_compositor *ec, struct wl_event_loop *loop)
{
struct termios raw_attributes;
if (tcgetattr(ec->tty_fd, &ec->terminal_attributes) < 0) {
fprintf(stderr, "could not get terminal attributes: %m\n");
return;
}
/* Ignore control characters and disable echo
*/
raw_attributes = ec->terminal_attributes;
cfmakeraw (&raw_attributes);
/* Fix up line endings to be normal
* (cfmakeraw hoses them)
*/
raw_attributes.c_oflag |= OPOST | OCRNL;
if (tcsetattr(ec->tty_fd, TCSANOW, &raw_attributes) < 0)
fprintf(stderr, "could not put terminal into raw mode: %m\n");
ec->term_signal_source = wl_event_loop_add_signal(loop, SIGTERM,
on_term_signal,
ec);
ec->tty_input_source = wl_event_loop_add_fd(loop, ec->tty_fd,
WL_EVENT_READABLE,
on_tty_input, ec);
}
static void watch_for_vt_changes(struct egl_compositor *ec, struct wl_event_loop *loop)
{
struct vt_mode mode = { 0 };
ec->tty_fd = open("/dev/tty0", O_RDWR | O_NOCTTY);
mode.mode = VT_PROCESS;
mode.relsig = SIGUSR1;
mode.acqsig = SIGUSR2;
@ -968,7 +1037,10 @@ egl_compositor_create(struct wl_display *display)
wl_display_add_global(display, &shooter->base);
loop = wl_display_get_event_loop(ec->wl_display);
if (open_active_tty (ec)) {
ignore_tty_input (ec, loop);
watch_for_vt_changes (ec, loop);
}
ec->timer_source = wl_event_loop_add_timer(loop, repaint, ec);
ec->repaint_needed = 0;
ec->repaint_on_timeout = 0;