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For 2023 (and 2024 ...) - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.

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I am also active in many other area and still look after a lot of web sites - you can find an index ((here))
Expect: Reading i/p without waiting for [Enter]

Posted by shruthi_21 (shruthi_21), 2 May 2006
In Expect, how can we read a data entered by user without waiting for a Enter key from the keyboard

Posted by admin (Graham Ellis), 3 May 2006
It all depends on the buffering of your operating system .... the issue you have come across is that the operating system typically doesn't send text typed in from the shell to expect until a new line is enetered.   That's done to give you a chance to correct typing errors.

Say, for example, that you were asked to enter your age and you entered 7 backspace 6 2 [enter] - you're 62 but you typed a seven by mistake; you do NOT want expect to act on the 7 nor have to clean up, do you?

In exceptional circumstances, you may want to bypass the buffering .... how to do that depends on the operating system you're running, whether you're running through a windows system, etc - not something I can give you a generic answer to based on what you've told us, I'm afraid



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