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https://git.rwth-aachen.de/acs/public/villas/node/
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76 lines
2.1 KiB
C++
76 lines
2.1 KiB
C++
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/** Terminal handling.
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*
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2018, Institute for Automation of Complex Power Systems, EONERC
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* @license GNU General Public License (version 3)
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*
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* VILLAScommon
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************************/
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#include <unistd.h>
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#include <villas/terminal.hpp>
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#include <villas/exceptions.hpp>
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#include <villas/log.hpp>
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using namespace villas;
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struct winsize Terminal::window;
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Terminal::Terminal()
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{
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int ret;
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isTty = isatty(fileno(stdin));
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if (isTty) {
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struct sigaction sa_resize;
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sa_resize.sa_flags = SA_SIGINFO;
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sa_resize.sa_sigaction = resize;
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sigemptyset(&sa_resize.sa_mask);
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ret = sigaction(SIGWINCH, &sa_resize, NULL);
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if (ret)
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throw new SystemError("Failed to register signal handler");
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/* Try to get initial terminal dimensions */
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ret = ioctl(STDERR_FILENO, TIOCGWINSZ, &window);
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if (ret)
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throw new SystemError("Failed to get terminal dimensions");
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}
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/* Fallback if for some reason we can not determine a prober window size */
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if (window.ws_col == 0)
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window.ws_col = 150;
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if (window.ws_row == 0)
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window.ws_row = 50;
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}
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void Terminal::resize(int, siginfo_t *, void *)
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{
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int ret;
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ret = ioctl(STDERR_FILENO, TIOCGWINSZ, &window);
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if (ret)
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throw new SystemError("Failed to get terminal dimensions");
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auto logger = logging.get("terminal");
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logger->debug("New terminal size: {}x{}", window.ws_row, window.ws_col);
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};
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