shell_检查磁盘剩余空间

#!/bin/bash
# 从文件中按行读取,每行分割成字符串, 形成数组#

function split_str()
{
str="$1"
OLD_IFS="$IFS"
IFS="$2"
array=($str)
IFS="$OLD_IFS"
for each in ${array[*]}
do
echo $each
done
}
ret=(`df -h | awk '{print $1 "," $2 "," $3 "," $4 "," $5 "," $6}'`)###ret为数组
split=","

sendflag=false###创建个变量用于标志需不需要发送通知
for line in ${ret[*]}
do
arr=(`split_str $line $split`)
numarr=(`split_str ${arr[3]} "G"`)###将函数调用的结果赋值给变量

####检查系统盘所剩空间,非整数比较大小需要拐个弯
if [ ${arr[5]} == "/" ] && [ `expr ${numarr[0]} \< 5.0` -eq 1 ]
then
sendflag=true
fi
if [ ${arr[5]} == "/XXX" ] && [ `expr ${numarr[0]} \< XXXX` -eq 1 ]
then
sendflag=true
fi
done
echo "sendFlag:" $sendflag