Representing arrow keys in a string

[Arindam Goswami]

I am using Ruby's Telnet class to establish a session with a remote
Linux machine to automate some remote administrative tasks.

The problem I am facing is this- At one point I come across a menu,
where the arrow keys have to be used to select certain options.

Is there any way to represent the arrow keys in the string that I am
sending to the remote machine?

Do let me know if you have any other ideas/suggestions?

 

[Michael Linfield]

I am using Ruby's Telnet class to establish a session with a remote
Linux machine to automate some remote administrative tasks.

The problem I am facing is this- At one point I come across a menu,
where the arrow keys have to be used to select certain options.

Is there any way to represent the arrow keys in the string that I am
sending to the remote machine?

Do let me know if you have any other ideas/suggestions?

instead of trying to make ruby know uve pushed an arrow key, think of
what command pressing a certain key does, then try to execute that
command in ruby code

 

[Arindam Goswami]

instead of trying to make ruby know uve pushed an arrow key, think of
what command pressing a certain key does, then try to execute that
command in ruby code

Hi Michael,

In this case, only an option is selected in a UI menu ... and no, I cant
modify/add or even read the code on the remote machine.

So I will have to send out the symbol(s) for the down arrow key over the
telnet session.

and thats where I am stuck.

 

[Sebastian Hungerecker]

Is there any way to represent the arrow keys in the string that I am
sending to the remote machine?

Typing gets in irb and then hitting the four arrow keys (in the order up,
down, right, left) (and then enter) gives me:
"\e[A\e[B\e[C\e[D\n"


HTH,
Sebastian

 

[Gaspard Bucher]

try irb:

STDIN.getc

... type arrow ...
... type return ...
=> 27 .. ESC

STDIN.getc => 91 .. [
STDIN.getc => 67 .. C
STDIN.getc

=> 10 .. (return)

My guess is : "\033[C" (\033 = octal for 27)

Gaspard

 

[Arindam Goswami]

Thanks Gaspard and Sebastian,

It works!!

Arindam