An easy way out

Why is it that there can't be a single way that's guaranteed to get you out of ANY program?

We use programs such as telnet and ssh (and others) and we're used to running an exit command to get out of them - so why, or why, does it have to be quit to get out of FTP?

[Ctrl-C] (Control - C) will get you out of most programs in an emergency - like if you've written your own program that's in an infinite loop. But ... it won't get you out of vi. To get out of vi, you can use ZZ or :q![Enter] or two or three other alternatives.

All of which help to keep life fun and interesting ;-)
(written 2005-03-17, updated 2006-06-05)

Commentator

says ...

Bruce James:

vi derives from ex and ed, which can handle data streams (which may contain (Ctrl-C)?) so perhaps thats why vi uses other exit commands..

The others I guess were the preference of the people who wrote the spec, or wrote the program.

And telnet uses (Ctrl-]) to get to its command mode before you can exit it using 'quit'. Typing 'exit' while logged in just exits the current shell.

And (Ctrl-D) will get you out of the shell and some interactive programs by sending an EOF. (ed will end with a (Ctrl-D) but not a (Ctrl-C))

It's all there to confuse the uninitiated... ;-)

B

(comment added 2005-03-17 10:17:46)

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