CODEWITHSUNDEEP
bash
Anderson Polo
Anderson Polo

Reputation: 1

Refresh only a few lines on Bash Script

So this is my output... 

00-
01-  Wallet : 123456789123465789 
02- 
03- --------------------
04- Server Stats Update:
05- --------------------
06-  Work Units : 0 (cancelled:0 | completed:0) 
07-  Average Complete Time : 0 
08- 
09- -------------
10- Stats Update:
11- -------------
12-  Work Units : 0 (ondemand:0 | precache:0 | paid:0) 
13-  Prize Pool : 0%    -    Earned : 0 
14-

I need the lines 06,07,12 and 13 to keep refreshing... the only method I found so far is by making a loop and clearing the output every two seconds...

Also I found that printf \033[A could be useful but I couldn't figure how to implement it here...

My code...

while true: do
  echo -e "\n Wallet : ${Address} \n"
  echo --------------------
  echo Server Stats Update:
  echo --------------------
  echo -e " Work Units : ${ServerOverallWU} (cancelled:${Cancelled} | completed:${Completed}) "
  echo -e " Average Complete Time : ${AvgCompTime} "
  echo
  echo -------------
  echo Stats Update:
  echo -------------
  echo -e " Work Units : ${SaveOverallWU} (ondemand:${SaveOnDemand} | precache:${SavePreCache} | paid:${SavePaidWU}) "
  echo -en " Prize Pool : ${SavePrizePool}%   -    Earned : ${SaveEarned} "
done

Ps: Fixed... just put the clear on the right stop and now it runs smooth as butter

Upvotes: 0

Views: 373

Answers (2)

Ivan
Ivan

Reputation: 7277

I've got a function for that

XY () { printf "\e[$2;${1}H$3"; }

Usage

XY 1 13 "Hello World!"

It'll print 'Hello World!' on column 1 of line 13. Comparing this with tput

for i in {1..100}; {
    tput cup $1 $2; printf "Hello World!"
}

real    0m0,130s
user    0m0,079s
sys     0m0,055s


for i in {1..100}; {
    XY $1 2 "Hello World!"
}

real    0m0,002s
user    0m0,002s
sys     0m0,000s

Upvotes: 0

tripleee
tripleee

Reputation: 189357

If you want complete control over your screen, you can probably clear it at the beginning of the script and then use direct cursor addressing to only repaint parts of the screen (i.e. move the cursor to position 1,13; repaint that line to replace it; then move to line 15 and repaint that) but this will be rather ugly and painful in pure Bash. Perhaps you should use a curses wrapper like whiptail to shield you from the details. Maybe see also https://unix.stackexchange.com/questions/155417/a-set-of-libraries-like-ncurses-in-a-shell-script

Upvotes: 1

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