Kristian Høgsberg
14 years ago
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96c8be98a6
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/*
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* Copyright © 2010 Intel Corporation |
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* |
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* Permission to use, copy, modify, distribute, and sell this software and |
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* its documentation for any purpose is hereby granted without fee, provided |
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* that the above copyright notice appear in all copies and that both that |
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* copyright notice and this permission notice appear in supporting |
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* documentation, and that the name of the copyright holders not be used in |
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* advertising or publicity pertaining to distribution of the software |
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* without specific, written prior permission. The copyright holders make |
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* no representations about the suitability of this software for any |
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* purpose. It is provided "as is" without express or implied warranty. |
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* |
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS |
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* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND |
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* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY |
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* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER |
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* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF |
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* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#include <termios.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <unistd.h> |
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#include <fcntl.h> |
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#include <signal.h> |
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#include <linux/kd.h> |
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#include <linux/vt.h> |
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#include <sys/ioctl.h> |
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#include "compositor.h" |
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struct tty { |
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struct wlsc_compositor *compositor; |
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int fd; |
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struct termios terminal_attributes; |
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struct wl_event_source *input_source; |
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struct wl_event_source *enter_vt_source; |
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struct wl_event_source *leave_vt_source; |
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}; |
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static void on_enter_vt(int signal_number, void *data) |
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{ |
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struct tty *tty = data; |
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int ret; |
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fprintf(stderr, "enter vt\n"); |
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ioctl(tty->fd, VT_RELDISP, VT_ACKACQ); |
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ret = ioctl(tty->fd, KDSETMODE, KD_GRAPHICS); |
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if (ret) |
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fprintf(stderr, "failed to set KD_GRAPHICS mode on console: %m\n"); |
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tty->compositor->focus = 1; |
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} |
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static void on_leave_vt(int signal_number, void *data) |
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{ |
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struct tty *tty = data; |
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int ret; |
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ioctl (tty->fd, VT_RELDISP, 1); |
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ret = ioctl(tty->fd, KDSETMODE, KD_TEXT); |
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if (ret) |
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fprintf(stderr, |
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"failed to set KD_TEXT mode on console: %m\n"); |
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tty->compositor->focus = 0; |
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} |
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static void |
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on_tty_input(int fd, uint32_t mask, void *data) |
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{ |
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struct tty *tty = data; |
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/* Ignore input to tty. We get keyboard events from evdev
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*/ |
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tcflush(tty->fd, TCIFLUSH); |
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} |
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struct tty * |
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tty_create(struct wlsc_compositor *compositor) |
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{ |
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struct termios raw_attributes; |
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struct vt_mode mode = { 0 }; |
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int ret; |
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struct tty *tty; |
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struct wl_event_loop *loop; |
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tty = malloc(sizeof *tty); |
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if (tty == NULL) |
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return NULL; |
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memset(tty, 0, sizeof *tty); |
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tty->compositor = compositor; |
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tty->fd = open("/dev/tty0", O_RDWR | O_NOCTTY); |
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if (tty->fd <= 0) { |
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fprintf(stderr, "failed to open active tty: %m\n"); |
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return NULL; |
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} |
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if (tcgetattr(tty->fd, &tty->terminal_attributes) < 0) { |
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fprintf(stderr, "could not get terminal attributes: %m\n"); |
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return NULL; |
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} |
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/* Ignore control characters and disable echo */ |
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raw_attributes = tty->terminal_attributes; |
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cfmakeraw(&raw_attributes); |
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/* Fix up line endings to be normal (cfmakeraw hoses them) */ |
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raw_attributes.c_oflag |= OPOST | OCRNL; |
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if (tcsetattr(tty->fd, TCSANOW, &raw_attributes) < 0) |
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fprintf(stderr, "could not put terminal into raw mode: %m\n"); |
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loop = wl_display_get_event_loop(compositor->wl_display); |
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tty->input_source = |
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wl_event_loop_add_fd(loop, tty->fd, |
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WL_EVENT_READABLE, on_tty_input, tty); |
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ret = ioctl(tty->fd, KDSETMODE, KD_GRAPHICS); |
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if (ret) { |
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fprintf(stderr, "failed to set KD_GRAPHICS mode on tty: %m\n"); |
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return NULL; |
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} |
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tty->compositor->focus = 1; |
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mode.mode = VT_PROCESS; |
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mode.relsig = SIGUSR1; |
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mode.acqsig = SIGUSR2; |
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if (!ioctl(tty->fd, VT_SETMODE, &mode) < 0) { |
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fprintf(stderr, "failed to take control of vt handling\n"); |
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return NULL; |
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} |
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tty->leave_vt_source = |
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wl_event_loop_add_signal(loop, SIGUSR1, on_leave_vt, tty); |
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tty->enter_vt_source = |
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wl_event_loop_add_signal(loop, SIGUSR2, on_enter_vt, tty); |
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return tty; |
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} |
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void |
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tty_destroy(struct tty *tty) |
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{ |
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int ret; |
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ret = ioctl(tty->fd, KDSETMODE, KD_TEXT); |
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if (ret) |
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fprintf(stderr, |
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"failed to set KD_GRAPHICS mode on tty: %m\n"); |
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if (tcsetattr(tty->fd, TCSANOW, &tty->terminal_attributes) < 0) |
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fprintf(stderr, |
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"could not restore terminal to canonical mode\n"); |
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free(tty); |
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} |
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