Adding a tty check for stdin
This commit is contained in:
Markus Gans
parent
07a29910b7
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dd625e0822
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2020-02-08 Markus Gans <guru.mail@muenster.de>
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2020-02-09 Markus Gans <guru.mail@muenster.de>
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* Adding a tty check for stdin
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* An application structure diagram was added to the document
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of the first steps
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@ -12,7 +12,7 @@
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width="101.5mm"
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sodipodi:docname="application-structure.svg"
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@ -27,13 +27,13 @@
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Before Width: | Height: | Size: 10 KiB After Width: | Height: | Size: 10 KiB |
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@ -29,9 +29,22 @@ Table of Contents
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Basic functions
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---------------
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FINAL CUT is a library for creating text-based terminal applications. It runs on several Unix-like platforms. The release of FINAL CUT is licensed under the terms of the GNU Lesser General Public License v3.0 ([GNU LGPL v3](https://www.gnu.org/licenses/lgpl-3.0-standalone.html)), which allows flexible licensing of applications. FINAL CUT has a [C++](https://en.wikipedia.org/wiki/C%2B%2B)-based object-oriented architecture for creating fast and lean programs.
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FINAL CUT is a library for creating text-based terminal applications.
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It runs on several Unix-like platforms. The release of FINAL CUT is
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licensed under the terms of the GNU Lesser General Public License v3.0
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([GNU LGPL v3](https://www.gnu.org/licenses/lgpl-3.0-standalone.html)),
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which allows flexible licensing of applications. FINAL CUT was written
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in the programming language [C++](https://en.wikipedia.org/wiki/C%2B%2B).
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The object-oriented design allows the creation of fast and lean programs.
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FINAL CUT is a [widget toolkit](http://en.wikipedia.org/wiki/Widget_toolkit). A user interface created consists of several widgets. FINAL CUT draws widgets on virtual windows and then mapped them on a virtual terminal. It uses the terminal capabilities from the [Termcap library](https://en.wikipedia.org/wiki/Termcap) to display the character matrix of the virtual terminal on the screen or a terminal emulator. It uses various optimization methods to improve the speed of the display.
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FINAL CUT is a [widget toolkit](http://en.wikipedia.org/wiki/Widget_toolkit).
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A user interface usually consists of several
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[widgets](https://en.wikipedia.org/wiki/Software_widget). FINAL CUT
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draws widgets on virtual windows and then mapped them on a virtual
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terminal. It uses the terminal capabilities from the
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[Termcap library](https://en.wikipedia.org/wiki/Termcap) to display
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the character matrix of the virtual terminal on the screen or a terminal
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emulator. It uses various optimization methods to improve the drawing speed.
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<figure class="image">
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<img src="final-cut-application-structure.svg" alt="application structure">
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@ -25,6 +25,7 @@
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#include <string>
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#include <vector>
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#include "final/fapplication.h"
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#include "final/fc.h"
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#include "final/fcharmap.h"
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#include "final/fcolorpalette.h"
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@ -2211,24 +2212,9 @@ void FTerm::init (bool disable_alt_screen)
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allocationValues();
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init_global_values(disable_alt_screen);
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// Initialize termios
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FTermios::init();
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// Get pathname of the terminal device
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init_terminal_device_path();
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// Initialize Linux or *BSD console
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initOSspecifics();
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// Save termios settings
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FTermios::storeTTYsettings();
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// Get output baud rate
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initBaudRate();
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// Terminal detection
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term_detection->detect();
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setTermType (term_detection->getTermType());
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// Initialize the terminal
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if ( ! init_terminal() )
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return;
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// Set maximum number of colors for detected terminals
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init_fixed_max_color();
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@ -2312,6 +2298,49 @@ void FTerm::init (bool disable_alt_screen)
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term_initialized = true;
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}
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//----------------------------------------------------------------------
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bool FTerm::init_terminal()
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{
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// Initialize termios
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FTermios::init();
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// Check if stdin is a tty
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if ( ! fsys->isTTY(FTermios::getStdIn()) )
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{
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data->setExitMessage("FTerm: Standard input is not a TTY.");
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FApplication::exit(EXIT_FAILURE);
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return false;
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}
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// Get pathname of the terminal device
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init_terminal_device_path();
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// Initialize Linux or *BSD console
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initOSspecifics();
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// Save termios settings
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try
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{
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FTermios::storeTTYsettings();
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}
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catch (const std::runtime_error& ex)
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{
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FString msg = "FTerm: " + FString(ex.what());
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data->setExitMessage(msg);
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FApplication::exit(EXIT_FAILURE);
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return false;
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}
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// Get output baud rate
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initBaudRate();
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// Terminal detection
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term_detection->detect();
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setTermType (term_detection->getTermType());
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return true;
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}
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//----------------------------------------------------------------------
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void FTerm::initOSspecifics()
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{
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@ -3,7 +3,7 @@
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* *
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* This file is part of the Final Cut widget toolkit *
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* *
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* Copyright 2018-2019 Markus Gans *
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* Copyright 2018-2020 Markus Gans *
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* *
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* The Final Cut is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU Lesser General Public License *
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@ -72,7 +72,10 @@ void FTermios::init()
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termios FTermios::getTTY()
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{
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struct termios t{};
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tcgetattr (stdin_no, &t);
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if ( tcgetattr(stdin_no, &t) == -1 )
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std::runtime_error("Cannot find tty");
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return t;
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}
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@ -86,7 +89,14 @@ void FTermios::setTTY (const termios& t)
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void FTermios::storeTTYsettings()
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{
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// Store termios settings
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term_init = getTTY();
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try
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{
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term_init = getTTY();
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}
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catch (...)
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{
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throw std::current_exception();
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}
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}
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//----------------------------------------------------------------------
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@ -343,6 +343,7 @@ class FTerm final
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void allocationValues();
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void deallocationValues();
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void init (bool);
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bool init_terminal();
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void initOSspecifics();
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void initTermspecifics();
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void initBaudRate();
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