I have a main batch file than calls 4 other batch files so we can run in parallel.
Example:
Main.bat
start call batch1.bat
start call batch2.bat
start call batch3.bat
start call batch4.bat
exit
I want the Main.bat to exit after all the batch1 to batch 4 has stopped executing. In this way, I can get the total run time of the batch file. Problem is Main.bat exits even before batch1 to batch4 finishes executing.
I tried to compute for %errorlevel% for each batch file, but it always return 0 even though the 4 .bat files are still running.
Hoping someone could help me!
Thank you! :)
I think this is the simplest and most efficient way:
@echo off
echo %time%
(
start call batch1.bat
start call batch2.bat
start call batch3.bat
start call batch4.bat
) | set /P "="
echo %time%
In this method the waiting state in the main file is event driven, so it does not consume any CPU time!
EDIT: Some explanations added
The set /P
command would terminate when anyone of the commands in the ( block )
outputs a line, but start
commands don't show any line in this cmd.exe. This way, set /P
keeps waiting for input until all processes started by start
commands ends. At that point the pipe line associated to the ( block )
is closed, so the set /P
Stdin is closed and set /P
command is terminated by the OS.
give a unique title string to the new processes, then check if any processes with this string in the title are running:
start "+++batch+++" batch1.bat
start "+++batch+++" batch2.bat
start "+++batch+++" batch3.bat
start "+++batch+++" batch4.bat
:loop
timeout /t 1 >nul
tasklist /fi "windowtitle eq +++batch+++*" |find "cmd.exe" >nul && goto :loop
echo all tasks finished
(find
is used, because tasklist
does not return a helpful errorlevel)
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With