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https://git.rwth-aachen.de/acs/public/villas/node/
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70 lines
1.7 KiB
C++
70 lines
1.7 KiB
C++
/** Terminal handling.
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*
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* @author Steffen Vogel <post@steffenvogel.de>
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* @copyright 2014-2022, Institute for Automation of Complex Power Systems, EONERC
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* @license Apache License 2.0
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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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class Terminal * Terminal::current = nullptr;
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Terminal::Terminal()
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{
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int ret;
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window.ws_row = 0;
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window.ws_col = 0;
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isTty = isatty(STDERR_FILENO);
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Logger logger = logging.get("terminal");
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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, nullptr);
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if (ret)
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throw 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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logger->warn("Failed to get terminal dimensions");
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} else {
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logger->info("stderr is not associated with a terminal! Using fallback values for window size...");
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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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if (!current)
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current = new Terminal();
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Logger logger = logging.get("terminal");
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int ret;
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ret = ioctl(STDERR_FILENO, TIOCGWINSZ, ¤t->window);
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if (ret)
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throw SystemError("Failed to get terminal dimensions");
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logger->debug("New terminal size: {}x{}", current->window.ws_row, current->window.ws_col);
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};
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