Windows 批处理 : combining start and FOR/f "tokens=1" with | escape coded symbols

Question

我正在尝试从标准 Windows 批处理文件中执行此命令。

start /B for /f "tokens=1" %%a in ('Query SESSION ^| find /i "rdp"') do (echo yes |reset session %%a)

它抛出一个错误:

"| was unexpected at this time."

我刚刚发现它失败了，因为 start 在开头。有什么问题吗？

Answer 1

从批处理文件中尝试使用 start 构建有效的单行解决方案是个坏主意，转义/引用复杂表达式非常棘手。

但是在同一个批处理文件中使用 start 和跳转到标签非常简单。

@echo off
REM *** Thread redirector
for /F "tokens=3 delims=:" %%F in ("%~0") do goto %%F

REM *** Start a new thread in this batch file at the label :myThread
start "" /b cmd /c "%~d0\:myThread:\..\%~pnx0"

echo Main
for /L %%n in (1 1 10) DO (
    echo MainThread doing some stuff %%n
    ping localhost -n 2 > nul
)
exit /b

:myThread
for /f "tokens=1" %%a in ('Query SESSION ^| find /i "rdp"') do (
    echo myThread: Resetting session %%a
    echo yes | reset session %%a
)
exit /b