在 Windows 上使用带有 for /f 的管道命令（使用 reg 查询）
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using piped commands with for /f on windows (with reg query)
提问by Rex
I am trying to query the install location of a program in the registry. All I'm interested in is the location output.
我正在尝试在注册表中查询程序的安装位置。我感兴趣的只是位置输出。
This questionhas a partial solution, but it doesn't quite help. On Windows 7, the reg command outputs a stupid registry key header along with the value, as shown below:
这个问题有一个部分解决方案，但它并没有多大帮助。在 Windows 7 上，reg 命令输出一个愚蠢的注册表项标头以及值，如下所示：
reg query "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\NSIS Unicode" /v InstallLocation
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\NSIS Unicode
InstallLocation REG_EXPAND_SZ C:\Program Files\NSIS
First, is there a way to turn off the header and simplify the output?
首先，有没有办法关闭标题并简化输出？
At the command prompt, I can change the above to
在命令提示符下，我可以将上面的更改为
reg query "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\NSIS Unicode" /v InstallLocation | findstr InstallLocation
so that it returns me just the second line.
以便它只返回第二行。
Now, if I am to use a FOR /Fto parse this and get only the directory value, the FORcommand fails saying | was unexpected at this time.
现在，如果我要使用 aFOR /F来解析它并仅获取目录值，则该FOR命令将无法显示| was unexpected at this time.
Here's my batch file:
这是我的批处理文件：
@for /f "tokens=2* delims= " %%k in ('reg query "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\NSIS Unicode" /v InstallLocation | findstr InstallLocation') do @echo %%k
So where am I going wrong?
那么我哪里出错了？
回答by Tomalak
You must escape the |character using a caret (^).
您必须|使用插入符号 ( ^)对字符进行转义。
@echo off
setlocal
set KEY=HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\NSIS Unicode
set V=InstallLocation
for /f "tokens=2* delims= " %%k in ('reg query "%KEY%" /v %V% ^| findstr "%V%"') do echo %%k
this would return REG_SZon my machine.
这将返回REG_SZ到我的机器上。
回答by Matej
The pipe char is special and has to be escaped with ^.
管道字符是特殊的，必须用^.
@for /f "tokens=2* delims= " %%k in ('reg query "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\NSIS Unicode" /v InstallLocation ^| findstr InstallLocation') do @echo %%k
