Asynchronous native batch tee script

[dbenham]

The delayed expansion is somehow disabled when the command is aborted with Ctrl-C.

It has nothing to do with the Ctrl-C, but you could read this article Why does delayed expansion fail when inside a piped block of code?

jeb

Actually it does have something to do with Ctrl-C, since the value is expanded properly when I don't press Ctrl-C (I temporarily disabled the END condition test so that I could see the value). It fails to expand properly after I press Ctrl-C. My guess is the Ctrl-C kills the batch context, reverting to delayed expansion off. The loop continues to execute in command prompt mode since it is already fully parsed and is executing from memory.


Dave Benham

[jeb]

Actually it does have something to do with Ctrl-C, since the value is expanded properly when I don't press Ctrl-C (I temporarily disabled the END condition test so that I could see the value). It fails to expand properly after I press Ctrl-C.

I not able to reproduce your results (and I can't believe them)

A simplification of the test

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@echo off
setlocal enableDelayedExpansion
set yes=True
(find /n /v ""&echo !yes!&echo :END) | more

Startet with

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echo Hello | sample.bat

[1]Hello
!yes!
:END

And I can't see any cause why the !yes! should expand,
but it could be possible that you have enabled delayed expansion via registry at your system.

The only way to expand in a pipe, the expression must be in a single line command

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setlocal enableDelayedExpansion
set yes=True
echo !yes! | more
echo one ^& echo !yes!
(echo This fails & echo !yes!) | more

jeb

[dbenham]

Your right, of course. I had myself thoroughly confused. I have no idea any more what I was looking at.

I would have responded earlier, but my home computer died 2 nights ago from a power surge


Dave Benham

[foxidrive]

but my home computer died 2 nights ago from a power surge

D'oh!

[einstein1969]

Hi Dave!

very nice work. A question:

why do you use the line?:

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(call )

einstein1969

[Ed Dyreen]

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(call ) ; exit and set errorLevel=0
(call)  ; exit and set errorLevel=1

slower but not limited to 0 v 1

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@echo off

call "%~f0" :exit 5
set errorLevel
pause

:exit
exit /b %~1

even slower but not requiring a function

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cmd /c exit 5

[dbenham]

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(call ) ; exit and set errorLevel=0
(call)  ; exit and set errorLevel=1

I almost agree, except that neither syntax EXITs anything. It simply sets the ERROROLEVEL to either 0 or 1.


Dave Benham

[einstein1969]

thanks Ed, thanks Dave.

einstein1969

[pieh-ejdsch]

Good mornig,

you can read Input without using find.
Now you can read any comments for Input one key.
command with Output Redirect into Logfile. Then the simultan Batch only runs to read this logfile.
No Line number
only one empty line a time.

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::batchTee.bat usage: 
:: command >logfile |batchTee LogFile 

@echo off
setlocal
set "LogFile=%~1"
if not exist %1 echo Datei nicht gefunden. &exit /b 1
set /a FileOpen =0

call :canIread <%1
exit /b 0

:canIread
:echo on
(type nul>>"%LogFile%") 2>nul && set /a FileOpen +=1
call :forL
if %FileOpen% gtr 20 exit /b
goto :canIread

:forL
for /l %%. in (1 1 100) do set /p "line=" && (
  set "LineEmpty="
  setlocal enabledelayedexpansion
  echo !line!
  endlocal
 ) || (
  if not defined LineEmpty (
   set /a FileOpen=0
   echo(
   set "LineEmpty=1"
  )
)
exit /b

Phil

[alexsander.albani]

Hello.
I need to do a simple stuff, but I'm having difficulties...

How can I display a command result both at screen and in a text file at the same time?

For example, a dir command displayed at screen and logged in a text file in only one execution.
Is that possible?

Thanks.

[foxidrive]

See the top of the first post viewtopic.php?p=32561#p32561

[Aacini]

Hello.
I need to do a simple stuff, but I'm having difficulties...

How can I display a command result both at screen and in a text file at the same time?

For example, a dir command displayed at screen and logged in a text file in only one execution.
Is that possible?

Thanks.

There is a working Tee.bat program at this post.

Antonio

[alexsander.albani]

Thank you Antonio and foxidrive.
I'm going to try it.