shell脚本一个时间循环

#!/bin/bash
#以小时循环
#sh x.sh 2017010101 2017010301

stime=$1
etime=$2
while :
do
echo $stime
stime=$(date -d "${stime:0:8} ${stime:8:2} 1hour"  +%Y%m%d%H)
if [[ $stime -gt $etime ]]
then
break
fi
done

#!/bin/bash
#以天做循环
#sh x.sh 20170101 20170103

stime=$1
etime=$2
while :
do
stime=$(date -d "$stime 1day"  +%Y%m%d)
if [[ $stime -gt $etime ]]; then
break;
fi
done