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Echo backspace in spinner script


 
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# 1  
Old 09-30-2013
Echo backspace in spinner script

Trying to insert a backspace for echo.

Code:
while true ; do
i='-\|/'
for j in 1 2 3 4
do
echo -ne "$(echo ${i} | cut -c${j})"
sleep 1
done
done

this currently outputs:
-\|/-\|/-\|/-\| .....etc

---------- Post updated at 02:34 PM ---------- Previous update was at 02:10 PM ----------

i resolved the issue myself using replacing echo with printf
Code:
while true ; do
i='-/|\'
for j in 1 2 3 4
do
printf "%c\r $(echo ${i} | cut -c${j})"
sleep 0.25
done
done

# 2  
Old 09-30-2013
Alternatively you can use ^H (ctrl+v backspace) as a backspace character.
# 3  
Old 09-30-2013
Your version of echo might support \b, in which case you might try:-
Code:
while true
do
   i='-\|/'
   for j in 1 2 3 4
   do
      echo -ne "\b$(echo ${i} | cut -c${j})"
      sleep 1
   done
done



I hope that this helps,

Robin
Liverpool/Blackburn
UK
# 4  
Old 09-30-2013
Code:
for i in \- / \| \\
do
printf "%c\r" "$i"
done

# 5  
Old 09-30-2013
Code:
indi=( "/" "-" "\\" "|" )
C=0
while [ true ]
do    printf "\b${indi[$C]}"
      let C++
      [[ $C -gt 3 ]] && C=0
done

hth

Last edited by sea; 09-30-2013 at 03:50 PM.. Reason: Changed \r to \b ; as \r is returnline...
# 6  
Old 09-30-2013
Code:
SP='-/|\'
while true; do printf "\b%s" ${SP:i++%4:1}; sleep 0.1; done

# 7  
Old 09-30-2013
You might like... ;o)
Much related you could try this as an added extra:-
Code:
Last login: Mon Sep 30 19:34:05 on ttys000
AMIGA:barrywalker~> clear; star=""; i='-\|/*'; for k in {0..9}; do for j in {0..4}; do clear; printf "\n\n\n\n\n          $star${i:$j:1}"; sleep 0.25; done; star="$star"'*'; done; printf "\n\n"

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