从 cmd 提示符中的 echo 捕获错误消息

发布于 2024-10-19 22:55:39 字数 285 浏览 5 评论 0原文

我正在 cmd 批处理脚本中将一些文本写入文本文件，如下所示：

echo FlagValue=Y>>flag.txt

这通常工作正常，但偶尔如果文本文件由不同进程打开，则会返回一条错误消息，指出“访问被拒绝”。我想做的是，如果发生类似以下错误，则停止批处理文件：

if return_code GEQ 1 GOTO ERR

但无法从 echo 命令找到返回代码。是否存在，或者是否有更好的策略来捕获错误消息？

原文

I'm writting out some text to a text file within a cmd batch script like such:

echo FlagValue=Y>>flag.txt

This normally works fine but occassionally if the text file is open by a different process, an error messgae is returned saying Access Denied. What I'd like to do is stop the batch file if an error occurs with something like:

if return_code GEQ 1 GOTO ERR

But can't find a return code from echo command. Does one exist, or is there a better tactic to use to capture error message?

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纵山崖 2024-10-26 22:55:39

echo FlagValue=Y>>flag.txt || echo access_denied Ensure you have rights

或

echo FlagValue=Y>>flag.txt
if /i %errorlevel% NEQ 0 do (
  echo access_denied Ensure you have rights
  call sendmail.cmd
)

样品：

C:\Users\Me\Desktop>echo Hello > MyFile.txt || echo ERROR
Access is denied.
ERROR

C:\Users\Me\Desktop>echo Hello > a.txt || echo ERROR

C:\Users\Me\Desktop>

echo FlagValue=Y>>flag.txt || echo access_denied Ensure you have rights

echo FlagValue=Y>>flag.txt
if /i %errorlevel% NEQ 0 do (
  echo access_denied Ensure you have rights
  call sendmail.cmd
)

Sample:

C:\Users\Me\Desktop>echo Hello > MyFile.txt || echo ERROR
Access is denied.
ERROR

C:\Users\Me\Desktop>echo Hello > a.txt || echo ERROR

C:\Users\Me\Desktop>

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