如何在 cmd.exe /c 参数中转义 "？

Question

我正在尝试使用 Windows 7 的 CMD /C 从 Perl 运行命令。该命令从提示符运行时可以正常工作，但需要引用其参数：

C:\>"C:\Program Files (x86)\gs\uninstgs.exe" "C:\Program Files (x86)\gs\gs8.63\uninstal.txt"

没有引号，它不起作用。

如果我尝试通过 CMD /C 运行它，我发现无法强制 CMD.EXE 将带引号的字符串作为参数传递给 exe 文件。这些不起作用：

C:\>C:\Windows\System32\cmd.exe /C "C:\Program Files (x86)\gs\uninstgs.exe" "C:\Program Files (x86)\gs\gs8.63\uninstal.txt"
'C:\Program' is not recognized as an internal or external command, operable program or batch file.

C:\>C:\Windows\System32\cmd.exe /C "C:\Program Files (x86)\gs\uninstgs.exe C:\Program Files (x86)\gs\gs8.63\uninstal.txt"
'C:\Program' is not recognized as an internal or external command, operable program or batch file.

C:\>C:\Windows\System32\cmd.exe /C "C:\Program Files (x86)\gs\uninstgs.exe" \"C:\Program Files (x86)\gs\gs8.63\uninstal.txt\"
'C:\Program' is not recognized as an internal or external command, operable program or batch file.

C:\>C:\Windows\System32\cmd.exe /C "C:\Program Files (x86)\gs\uninstgs.exe" "\"C:\Program Files (x86)\gs\gs8.63\uninstal.txt\""
'C:\Program' is not recognized as an internal or external command, operable program or batch file.

C:\>C:\Windows\System32\cmd.exe /C "C:\Program Files (x86)\gs\uninstgs.exe" ""C:\Program Files (x86)\gs\gs8.63\uninstal.txt""
'C:\Program' is not recognized as an internal or external command, operable program or batch file.

C:\>C:\Windows\System32\cmd.exe /C "C:\Program Files (x86)\gs\uninstgs.exe" """C:\Program Files (x86)\gs\gs8.63\uninstal.txt"""
'C:\Program' is not recognized as an internal or external command, operable program or batch file.

C:\>C:\Windows\System32\cmd.exe /C "C:\Program Files (x86)\gs\uninstgs.exe" ^"C:\Program Files (x86)\gs\gs8.63\uninstal.txt^"
'C:\Program' is not recognized as an internal or external command, operable program or batch file.

C:\>C:\Windows\System32\cmd.exe /C "C:\Program Files (x86)\gs\uninstgs.exe" "^"C:\Program Files (x86)\gs\gs8.63\uninstal.txt^""
'C:\Program' is not recognized as an internal or external command, operable program or batch file.

我应该使用什么语法？

Answer 1

有趣的是 cmd.exe 实际上包含了答案。

这是 cmd /?

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.

所以在你的情况下，它将是：

C:\>C:\Windows\System32\cmd.exe /C ""C:\Program Files (x86)\gs\uninstgs.exe" "C:\Program Files (x86)\gs\gs8.63\uninstal.txt""

也就是说，也可以使用 8.3 短名称，从而将 Program Files 截断为 Progra~1 或 Progra~2。更重要的是，您可以使用相对路径并在执行命令之前先导航到 c:\Program Files(x86)。您的命令将变为：

C:\>cd /d "c:\Program Files (x86)" && C:\Windows\System32\cmd.exe /C ".\gs\uninstgs.exe .\gs\gs8.63\uninstal.txt"