Linux shell试试看终于

Question

有没有像linux try catch一样的linux bash命令？或者linux shell总是继续？

try {
   `executeCommandWhichCanFail`
   mv output
} catch {
    mv log
} finally {
    rm tmp
}

Answer 1

好吧,有点:

{ # your 'try' block
    executeCommandWhichCanFail &&
    mv output
} || { # your 'catch' block
    mv log
}

 rm tmp # finally: this will always happen

Answer 2

根据您的示例,无论脚本如何退出,您似乎都在尝试执行类似于始终删除临时文件的操作.在Bash中这样做尝试trap内置命令来捕获EXIT信号.

#!/bin/bash

trap 'rm tmp' EXIT

if executeCommandWhichCanFail; then
    mv output
else
    mv log
    exit 1 #Exit with failure
fi

exit 0 #Exit with success

脚本退出时始终执行该rm tmp语句trap,因此将始终尝试删除文件"tmp".

安装的陷阱也可以重置; 仅使用信号名称调用陷阱将重置信号处理程序.

trap EXIT

有关更多详细信息,请参阅bash手册页: man bash