0
Stylish 1 Here is a little spinner thing for the command line, used when your current bash script is waiting on a background/system process.
The weird character is ^H or a backspace.
Spinner
Stylish 1 ## This is similar to what FreeBSD does when it is booting
### some command &
### do_progress_spin_l $!
# A small "asterik" like thing will spin until the process is complete
#+ (when ps ax | grep PID no longer finds anything)
do_progress_spin_l()
{
## The characters to use
# These will be overlapped via ^H
ICON[0]="/"
ICON[1]="-"
ICON[2]="\\"
ICON[3]="|"
## The process we wish to monitor
PROCESS=$1
## Initialize count value
# print out first icon
icon_num=0
echo -n ${ICON[$icon_num]}
## While the process exists in ps ax, do this loop
while ( ps ax | grep $PROCESS | grep -v "grep" 1>/dev/null )
do
## If our count is bigger than 3 (our highest number icon)
# reset it to 0
if [ "$icon_num" -gt "3" ]; then
icon_num=0
fi
## ^Hnew_icon
echo -n ${ICON[$icon_num]}
icon_num=`expr $icon_num + 1`
sleep 0.5
# sleep 1
done
## Little clean-up. Print done and a new line
echo -n "... Done"
echo ""
}0
cfajohnson 7 If you want to slow down the loop increase the argument to sleep, don't call an external command for integer arithmetic.
icon_num=$(( $icon_num + 1 ))That's a very complicated script for a simple task; try this:
some_command &
pid=$!
delay=.25
string='|/-\'
while :
do
temp=${string#?}
printf " %c\r" "$string"
string=$temp${string%"$temp"}
sleep $delay ## requires sleep that accepts decimals
done &
wait $pid && kill $!
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