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：
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
