shell – 验证副本是否成功

发布时间：2020-12-16 01:14:56 所属栏目：安全来源：网络整理

导读：我想编写一个脚本来验证副本是否成功. 这就是我所拥有的： #!/bin/shcp home/testing/present.txt home/testing/future.txt echo "Copy Code: $? - Successful"if [ $? != 0 ]; then echo "Copy Code: $? - Unsuccessful"fi “if”语句未初始化.怎么解决这个

我想编写一个脚本来验证副本是否成功.
这就是我所拥有的：

#!/bin/sh
cp home/testing/present.txt home/testing/future.txt
   echo "Copy Code: $? - Successful"
if [ $? != 0 ]; then
   echo "Copy Code: $? - Unsuccessful"
fi

“if”语句未初始化.怎么解决这个？
感谢您的时间.

$？指的是最后一个命令：

#!/bin/sh
cp home/testing/present.txt home/testing/future.txt
   echo "Copy Code: $? - Successful"   # last command: cp
if [ $? != 0 ]; then                   # last command: echo
   echo "Copy Code: $? - Unsuccessful" # last command: [
fi

如果要重复使用特定命令的状态,只需将结果保存在另一个变量中：

#!/bin/sh
cp home/testing/present.txt home/testing/future.txt
status=$?
echo "Copy Code: $status - Successful"
if [ $status != 0 ]; then
   echo "Copy Code: $status - Unsuccessful"
fi

但是,更好的方法是首先简单地测试cp命令：

if cp home/testing/present.txt home/testing/future.txt
then
  echo "Success"
else
  echo "Failure,exit status $?"
fi

（编辑：李大同）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!