#!/bin/bash
#允许的进程数
THREAD_NUM=200
#定义描述符为9的管道
mkfifo tmp
exec 9<>tmp
#预先写入指定数量的换行符，一个换行符代表一个进程
for ((i=0;i<$THREAD_NUM;i++))
do
echo -ne " " 1>&9
done
if [ $# != 1 ] ;then
echo "The parameters you enter is not correct !";
exit -1;
fi
while read line
do
{
#进程控制
read -u 9
{
#isok=`curl -I -o /dev/null -s -w %{http_code} $line`
if [ "$isok" = "200" ]; then
echo $line "OK"
else
echo $line "no"
fi
echo -ne " " 1>&9
}&
}
done < $1
wait
echo "执行结束"
rm tmp
#转自http://www.jb51.net/article/51720.htm