trap spinner

trap_spin.sh

#!/bin/bash

tmpdir=$(mktemp -d -p "./")


tmpf=$(mktemp -u)

mkfifo $tmpf


function progress(){

	#disappear cursor
	echo -ne '\E[?25l'

	local _spiner=("/" "-"  "\\" "|")
	#local _spiner=("+" "x")
	local _i=0
	local _j=0

	#save cursor position
	tput sc
	#check pid exists
	while [ -x /proc/"$1" ]
		#while  :
	do
		echo -en " $1 waiting for response.. \033[35m[${_spiner[$_i]}]\033[0m"
		_i=$((_i + 1))
		_j=$((_j + 1))
		if [ $_i = 4 ]; then
			_i=0
		fi
		#restore cursor
		tput rc
		usleep 25000
	done

	#erase line
	tput el
	#echo -en "\033[33m[respond]\033[0m\n"
	#appear cursor
	echo -en "\E[?25h"
}

function abc(){
	sleep 2
	echo "aa" > $tmpf &
}



(abc)&
pid=$!
echo $pid
progress $pid

ABC=$(cat $tmpf)
echo $ABC