Support for signal handling and terminal control

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Add a new built-in exit command that exits from your shell with the exit() system call. Also add support for signal handling and terminal control (Ctrl-C, Ctrl-Z). You do not want those signals to terminate your shell. Instead you need to handle them and terminate processes that your shell started if any. Be aware that forked processes will inherit the signal handlers of the original process.

Reference no: EM132717102

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