Capture and process signals such as system interrupts

[JinnyYi]

Support recieving and handling ctrl + c and exiting application.

[JinnyYi]

Do we need to clean up any unfinished data before exiting the application, such as abort multipart upload?

[Xuanwo]

Do we need to clean up any unfinished data before exiting the application, such as abort multipart upload?

No, while we receive a Ctrl+C, we should exit as soon as possible.