多线程FTP下载日志脚本

#!/bin/bash

ip_list=`cat $1`

thead_num=5
tmp_fifofile="/tmp/$$.fifo"
mkfifo "$tmp_fifofile"
exec 4<>"$tmp_fifofile"
rm -f $tmp_fifofile

for ((i=0;i<$thead_num;i++))
do
    echo ""                                                                                  
done >&4

for i in $ip_list
do
read -u4
{
ftp -n<<!
open $i
user user1 123456
binary
lcd /home/log/huawei
prompt
mget *
close
bye
!
sleep 3
echo "" >&4 
}&
done
wait
exec 4>&-
exit 0