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Move tty and vt handling out in its own file

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This commit is contained in:
Kristian Høgsberg 2011-01-14 14:59:13 -05:00
parent 96c8be98a6
commit e4762a6ac1
4 changed files with 174 additions and 131 deletions
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163
compositor/tty.c Normal file
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/*
* Copyright © 2010 Intel Corporation
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of the copyright holders not be used in
* advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. The copyright holders make
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <termios.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include <linux/kd.h>
#include <linux/vt.h>
#include <sys/ioctl.h>
#include "compositor.h"
struct tty {
struct wlsc_compositor *compositor;
int fd;
struct termios terminal_attributes;
struct wl_event_source *input_source;
struct wl_event_source *enter_vt_source;
struct wl_event_source *leave_vt_source;
};
static void on_enter_vt(int signal_number, void *data)
{
struct tty *tty = data;
int ret;
fprintf(stderr, "enter vt\n");
ioctl(tty->fd, VT_RELDISP, VT_ACKACQ);
ret = ioctl(tty->fd, KDSETMODE, KD_GRAPHICS);
if (ret)
fprintf(stderr, "failed to set KD_GRAPHICS mode on console: %m\n");
tty->compositor->focus = 1;
}
static void on_leave_vt(int signal_number, void *data)
{
struct tty *tty = data;
int ret;
ioctl (tty->fd, VT_RELDISP, 1);
ret = ioctl(tty->fd, KDSETMODE, KD_TEXT);
if (ret)
fprintf(stderr,
"failed to set KD_TEXT mode on console: %m\n");
tty->compositor->focus = 0;
}
static void
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);
}
struct tty *
tty_create(struct wlsc_compositor *compositor)
{
struct termios raw_attributes;
struct vt_mode mode = { 0 };
int ret;
struct tty *tty;
struct wl_event_loop *loop;
tty = malloc(sizeof *tty);
if (tty == NULL)
return NULL;
memset(tty, 0, sizeof *tty);
tty->compositor = compositor;
tty->fd = open("/dev/tty0", O_RDWR | O_NOCTTY);
if (tty->fd <= 0) {
fprintf(stderr, "failed to open active tty: %m\n");
return NULL;
}
if (tcgetattr(tty->fd, &tty->terminal_attributes) < 0) {
fprintf(stderr, "could not get terminal attributes: %m\n");
return NULL;
}
/* Ignore control characters and disable echo */
raw_attributes = tty->terminal_attributes;
cfmakeraw(&raw_attributes);
/* Fix up line endings to be normal (cfmakeraw hoses them) */
raw_attributes.c_oflag |= OPOST | OCRNL;
if (tcsetattr(tty->fd, TCSANOW, &raw_attributes) < 0)
fprintf(stderr, "could not put terminal into raw mode: %m\n");
loop = wl_display_get_event_loop(compositor->wl_display);
tty->input_source =
wl_event_loop_add_fd(loop, tty->fd,
WL_EVENT_READABLE, on_tty_input, tty);
ret = ioctl(tty->fd, KDSETMODE, KD_GRAPHICS);
if (ret) {
fprintf(stderr, "failed to set KD_GRAPHICS mode on tty: %m\n");
return NULL;
}
tty->compositor->focus = 1;
mode.mode = VT_PROCESS;
mode.relsig = SIGUSR1;
mode.acqsig = SIGUSR2;
if (!ioctl(tty->fd, VT_SETMODE, &mode) < 0) {
fprintf(stderr, "failed to take control of vt handling\n");
return NULL;
}
tty->leave_vt_source =
wl_event_loop_add_signal(loop, SIGUSR1, on_leave_vt, tty);
tty->enter_vt_source =
wl_event_loop_add_signal(loop, SIGUSR2, on_enter_vt, tty);
return tty;
}
void
tty_destroy(struct tty *tty)
{
int ret;
ret = ioctl(tty->fd, KDSETMODE, KD_TEXT);
if (ret)
fprintf(stderr,
"failed to set KD_GRAPHICS mode on tty: %m\n");
if (tcsetattr(tty->fd, TCSANOW, &tty->terminal_attributes) < 0)
fprintf(stderr,
"could not restore terminal to canonical mode\n");
free(tty);
}