TestSignals is a platform designed to help users understand UNIX signals. It provides tools for testing and analyzing signal behavior, enabling users to gain deeper insight into how signals work and how they can be used in various applications.
TestSignals is a software program that sets up signal handlers for most of the commonly sent signals. It is a useful test platform for understanding UNIX signals. You can send signals to TestSignals using the 'kill' command from a Terminal window. The program recognizes Signals such as HUP = 1, INT = 2, KILL = 9, TERM = 15, STOP = 17, QUIT = 3, ABRT = 6, USR1 = 30, USR2 = 31 which you can use to send the signals. Alternatively, you can use the pull-down menu option to send signals to the program.
TestSignals also allows you to test the signals sent by the "Force-Quit" operation. The program sets a global variable in the signal handler, which is later read by a method that is called periodically via an NSTimer. Due to the restrictive nature of what you can do safely in a signal handler, TestSignals only sets the global variable.
This software project demonstrates several aspects of programming for Mac OS X using the Cocoa API. Firstly, it showcases the use of NSPopupButton to implement a pull-down menu that uses 'tags' to identify which menu item was chosen. Secondly, it demonstrates the use of 'scrollRangeToVisible' to keep the latest information visible in a scrolled NSTextView. The third aspect is the use of 'applicationShouldTerminateAfterLastWindowClosed' to quit the application when the window is closed. Finally, the program features updating a counter via NSTimer.
To use TestSignals, you will require Xcode to build the application from the source. Overall, TestSignals is an excellent tool that provides practical insights into how UNIX signals work.
TestSignals also allows you to test the signals sent by the "Force-Quit" operation. The program sets a global variable in the signal handler, which is later read by a method that is called periodically via an NSTimer. Due to the restrictive nature of what you can do safely in a signal handler, TestSignals only sets the global variable.
This software project demonstrates several aspects of programming for Mac OS X using the Cocoa API. Firstly, it showcases the use of NSPopupButton to implement a pull-down menu that uses 'tags' to identify which menu item was chosen. Secondly, it demonstrates the use of 'scrollRangeToVisible' to keep the latest information visible in a scrolled NSTextView. The third aspect is the use of 'applicationShouldTerminateAfterLastWindowClosed' to quit the application when the window is closed. Finally, the program features updating a counter via NSTimer.
To use TestSignals, you will require Xcode to build the application from the source. Overall, TestSignals is an excellent tool that provides practical insights into how UNIX signals work.
What's New
Version 0.2: N/A