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This system is usually preserved even in graphical terminal emulators. Typically a program that does handle a SIGINT will still terminate itself, or at least terminate the task running inside it.
#What happens when you hit ctrl u how to
If the program does not specify how to handle this condition, the program is terminated. In POSIX systems, the sequence causes the active program to receive SIGINT, the interruption signal.
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Later systems that copied it include CP/M, MS-DOS and Microsoft Windows. Its popularity as an abort command was adopted by other systems including Unix. Later versions of Windows adopted the shortcuts using Control instead of the Command key.Ĭontrol+C ("C for Cancel") was part of various Digital Equipment operating systems, including TOPS-10 and TOPS-20. IBM and early versions of windows used a different set of keys as part of IBM Common User Access. The four letters are all located together at the left end of the bottom row of the standard QWERTY keyboard. During the development of the Macintosh it was decided that the cut, paste, copy and undo would be used frequently and assigned them to the ⌘- Z (Undo), ⌘- X (Cut), ⌘- C (Copy), and ⌘- V (Paste). Larry Tesler created the concept of cut, copy, paste, and undo for human-computer interaction while working at Xerox PARC to control text editing.