Delete last two lines of stdout using c shell?

Question

I want to create a little animation in the stdout of the terminal using printf. So far I figured out how to replace the last line with

#!/bin/csh -f        
printf "text1"
printf "text2"
sleep 1
printf "\r replaced text2"

How do I replace both lines?

printf "\r\r replace text1"

does not work....

score 2 · Accepted Answer · answered Nov 06 '13 at 19:58

2

You need to use the cuu1 terminfo capability to move the cursor up.

printf "foobar"
tput cuu1
printf "baz"

answered Nov 06 '13 at 19:58

Note that `tput cuu1` will move the cursor up one row, but it will stay on the same column. Depending on what you're doing, you might want to print another `"\r"`, or perhaps use whatever `tput` code moves the cursor to the beginning of the line. Note also that if the new text is shorter than the old text, it won't replace all of it: `printf "original\rNEW\n"` prints `NEWginal`. – Keith Thompson Nov 06 '13 at 20:16

score 0 · Answer 2 · answered Nov 06 '13 at 22:40

0

Ignacios answer brought me on the right track! Thanks!! Nevertheless:

    tput cuu N

sets your cursor N lines back.

answered Nov 06 '13 at 22:40

MichaelScott

2 Answers2