1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "ui/ozone/platform/dri/virtual_terminal_manager.h" 6 7 #include <errno.h> 8 #include <fcntl.h> 9 #include <linux/kd.h> 10 #include <linux/vt.h> 11 #include <sys/ioctl.h> 12 #include <unistd.h> 13 14 #include "base/logging.h" 15 16 namespace ui { 17 18 namespace { 19 20 const char kTTYDevice[] = "/dev/tty1"; 21 22 const int kVT = 1; 23 24 } // namespace 25 26 VirtualTerminalManager::VirtualTerminalManager() { 27 // Use the current console. 28 fd_ = open(kTTYDevice, O_RDWR | O_CLOEXEC, 0); 29 if (fd_ < 0) 30 LOG(ERROR) << "Failed to open '" << kTTYDevice << "' " << strerror(errno); 31 32 if (ioctl(fd_, VT_ACTIVATE, kVT) || ioctl(fd_, VT_WAITACTIVE, kVT)) 33 LOG(ERROR) << "Failed to switch to VT: " << kVT 34 << " error: " << strerror(errno);; 35 36 if (ioctl(fd_, KDGETMODE, &vt_mode_)) 37 LOG(ERROR) << "Failed to get VT mode: " << strerror(errno); 38 39 if (ioctl(fd_, KDSETMODE, KD_GRAPHICS)) 40 LOG(ERROR) << "Failed to set graphics mode: " << strerror(errno); 41 42 if (tcgetattr(fd_, &terminal_attributes_)) 43 LOG(ERROR) << "Failed to get terminal attributes"; 44 45 // Stop the TTY from processing keys and echo-ing them to the terminal. 46 struct termios raw_attributes = terminal_attributes_; 47 cfmakeraw(&raw_attributes); 48 raw_attributes.c_oflag |= OPOST; 49 if (tcsetattr(fd_, TCSANOW, &raw_attributes)) 50 LOG(ERROR) << "Failed to set raw attributes"; 51 52 if (ioctl(fd_, KDGKBMODE, &previous_keyboard_mode_)) 53 LOG(ERROR) << "Failed to get keyboard mode"; 54 55 if (ioctl(fd_, KDSKBMODE, K_OFF) && ioctl(fd_, KDSKBMODE, K_RAW)) 56 LOG(ERROR) << "Failed to set keyboard mode"; 57 } 58 59 VirtualTerminalManager::~VirtualTerminalManager() { 60 if (fd_ < 0) 61 return; 62 63 if (ioctl(fd_, KDSETMODE, &vt_mode_)) 64 LOG(ERROR) << "Failed to restore VT mode"; 65 66 if (ioctl(fd_, KDSKBMODE, previous_keyboard_mode_)) 67 LOG(ERROR) << "Failed to restore keyboard mode"; 68 69 if (tcsetattr(fd_, TCSANOW, &terminal_attributes_)) 70 LOG(ERROR) << "Failed to restore terminal attributes"; 71 72 close(fd_); 73 } 74 75 } // namespace ui 76
