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| 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 | |
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