What does echo ^[[r do?


 
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# 1  
Old 07-24-2005
Lightbulb What does echo ^[[r do?

I tried echo ^[[r and it takes the cursor to first line in the telnet window...
and echo ^[[32m changes font color to green .... Also echo ^[[00ff takes cursor to first command line in the current window (Note : ^ is entered as Ctrl + V and first [ as Escape character)

Wud like to know how shell interprets these commands ?? and what the arguments r, 32m , 00ff etc stand for ?? And is there any other potential impact if we use these commands in a shell script ??

Thanks in advance,

Salim
# 2  
Old 07-24-2005
Quote:
Originally Posted by hamsasal
Wud like to know how shell interprets these commands ??
The shell does not interpet them, the terminal/terminal emulator does.
Quote:
Originally Posted by hamsasal
And is there any other potential impact if we use these commands in a shell script ??
You have already described the impact: the cursor moves and the color changes.

The effects are related to your terminal type; escape sequences won't work with all terminals.

Thomas
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