Question

我正在更新一个最初有可执行变量的批处理文件，如下所示：

set var=C:\SomeProgram\program.exe

我能够使用cmd.exe的以下语法正确运行批处理文件中的程序：

start "" cmd /k %var% "%param1%" "%param2%"

不得不在网络上移动一些东西，现在变量是这样的：

set var=D:\Some Group\3. Team Number\SomeProgram\program.exe

空格和\往往会导致问题，具体取决于我知道可以解决的组合，方法是将变量用""括起来，如下所示："%var%"。但是，当我尝试运行命令时：

start "" cmd /k "%var%" "%param1%" "%param2%"

我得到：D:\Some is not recognized as an internal...yada yada...。通过一些调试：

start "" cmd /k "%var%"运行应用程序

start "" cmd /k ""%var%" "%param1%" "%param2%""运行应用程序

为什么我现在需要将周围的""包含在我之前不需要的整个命令字符串中，因为应用程序端点位置现在包含在""中？

Answer 1

cmd.exe可能非常古怪。如果您输入cmd /?，其输出中的以下段落将解释所有内容：

If /C or /K is specified, then the remainder of the command line after
the switch is processed as a command line, where the following logic is
used to process quote (") characters:

    1.  If all of the following conditions are met, then quote characters
        on the command line are preserved:

        - no /S switch
        - exactly two quote characters
        - no special characters between the two quote characters,
          where special is one of: &<>()@^|
        - there are one or more whitespace characters between the
          two quote characters
        - the string between the two quote characters is the name
          of an executable file.

    2.  Otherwise, old behavior is to see if the first character is
        a quote character and if so, strip the leading character and
        remove the last quote character on the command line, preserving
        any text after the last quote character.

在您的情况下，治疗1的条件并不完全满足，因此使用治疗2。在cmd /k "%var%" "%param1%" "%param2%"中，第一个和最后一个引号被删除，最终出现在错误的cmd /k %var%" "%param1%" "%param2%中。正如你所做的那样，在/k之后在整行上添加引号可以解决问题。

双引号命令字符串超出/ k flag

1 个答案: