小编Uni*_*eth的帖子

我有一个执行所有命令直到到达if语句的脚本：

脚本：

#!/bin/bash

######VARIABLES#######
#grep return value
gret=$?

######LOGIC#######
cd /home/logs
echo "Enter filename: "
read filenamex
echo "filename : ${filenamex}"
grep ${filenamex} log.dat | grep "End receiving ftp file:"
echo $?

if [ {gret} -ne 0 ]; then
   echo "{filenamex} cannot be found in the recent logs. We will now check the old logs."
   sleep 3
   grep ${filenamex} log.dat* | grep "End receiving ftp file:"
fi

任何人都可以帮我执行脚本，以便如果我无法获得grep所需的值，脚本将执行该if语句吗？