diff options
Diffstat (limited to 'chromium/ui/ozone/platform/dri/virtual_terminal_manager.cc')
-rw-r--r-- | chromium/ui/ozone/platform/dri/virtual_terminal_manager.cc | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/chromium/ui/ozone/platform/dri/virtual_terminal_manager.cc b/chromium/ui/ozone/platform/dri/virtual_terminal_manager.cc new file mode 100644 index 00000000000..efd83504577 --- /dev/null +++ b/chromium/ui/ozone/platform/dri/virtual_terminal_manager.cc @@ -0,0 +1,75 @@ +// Copyright 2014 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#include "ui/ozone/platform/dri/virtual_terminal_manager.h" + +#include <errno.h> +#include <fcntl.h> +#include <linux/kd.h> +#include <linux/vt.h> +#include <sys/ioctl.h> +#include <unistd.h> + +#include "base/logging.h" + +namespace ui { + +namespace { + +const char kTTYDevice[] = "/dev/tty1"; + +const int kVT = 1; + +} // namespace + +VirtualTerminalManager::VirtualTerminalManager() { + // Use the current console. + fd_ = open(kTTYDevice, O_RDWR | O_CLOEXEC, 0); + if (fd_ < 0) + LOG(ERROR) << "Failed to open '" << kTTYDevice << "' " << strerror(errno); + + if (ioctl(fd_, VT_ACTIVATE, kVT) || ioctl(fd_, VT_WAITACTIVE, kVT)) + LOG(ERROR) << "Failed to switch to VT: " << kVT + << " error: " << strerror(errno);; + + if (ioctl(fd_, KDGETMODE, &vt_mode_)) + LOG(ERROR) << "Failed to get VT mode: " << strerror(errno); + + if (ioctl(fd_, KDSETMODE, KD_GRAPHICS)) + LOG(ERROR) << "Failed to set graphics mode: " << strerror(errno); + + if (tcgetattr(fd_, &terminal_attributes_)) + LOG(ERROR) << "Failed to get terminal attributes"; + + // Stop the TTY from processing keys and echo-ing them to the terminal. + struct termios raw_attributes = terminal_attributes_; + cfmakeraw(&raw_attributes); + raw_attributes.c_oflag |= OPOST; + if (tcsetattr(fd_, TCSANOW, &raw_attributes)) + LOG(ERROR) << "Failed to set raw attributes"; + + if (ioctl(fd_, KDGKBMODE, &previous_keyboard_mode_)) + LOG(ERROR) << "Failed to get keyboard mode"; + + if (ioctl(fd_, KDSKBMODE, K_OFF) && ioctl(fd_, KDSKBMODE, K_RAW)) + LOG(ERROR) << "Failed to set keyboard mode"; +} + +VirtualTerminalManager::~VirtualTerminalManager() { + if (fd_ < 0) + return; + + if (ioctl(fd_, KDSETMODE, &vt_mode_)) + LOG(ERROR) << "Failed to restore VT mode"; + + if (ioctl(fd_, KDSKBMODE, previous_keyboard_mode_)) + LOG(ERROR) << "Failed to restore keyboard mode"; + + if (tcsetattr(fd_, TCSANOW, &terminal_attributes_)) + LOG(ERROR) << "Failed to restore terminal attributes"; + + close(fd_); +} + +} // namespace ui |