shell下同时读取多个文件的方法(2)

readfiles() {
	local FD1=7
	local FD2=8
	local file1=$1
	local file2=$2
	local count1=0
	local count2=0
	local eof1=0
	local eof2=0
	local data1
	local data2
 
	# Open files.
	exec 7<$file1
	exec 8<$file2
	while [[ $eof1 -eq 0  ||  $eof2 -eq 0 ]]
	do
		if read data1<&$FD1; then
			let count1++
			printf "%s, line %d: %s\n" $file1 $count1 "$data1"
		else
			eof1=1
		fi
		if read data2 <&$FD2; then
			let count2++
			printf "%s, line %d: %s\n" $file2 $count2 "$data2"
		else
			eof2=1
		fi
	done
}
#read file1 and file2
readfiles file1 file2