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I am trying to make a script (batch in windows) that download 5 text files using wget, and do some operations to each one, so I am thinking to do this with a loop just like this

set i=0
:begin
set /a i=%i%+1
if %i% equ 5 exit
wget ".....file1.txt"
goto operations

:operations
stuff
stuff
goto begin
  • operation consist of getting infromation from the text using grep and sed and saving it to text

well, it should work, but this will take a lot of time, I want the batch to do it in an efficient way, because in this way it will download one (take some time) and will do the opeartions. What I want to do is to make it a multi threaded, I mean to make it do these 5 files (download+operations) simultaneously.

thanks

caitriona
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Leo92
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1 Answers1

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If you made the actual process of wget + processing a separate batch file, you can then "start" the batch file which will spawn it as a sub process and continue on in your main batch file eg.

batchfile1.cmd
<do something really long>

batchfile2.cmd

for %%N in (a b c d e f g) do start batchfile1.cmd %%n

you'll end up with a-g running all at the same time - however you cant easily then tell when all have finished.

BugFinder
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  • is there a way to call a label 5 times , maybe like start :label & start label ---- ? – Leo92 Aug 29 '12 at 17:35
  • No.. a batch file itself is single threaded, hence you need to spawn other batch files (or call the same one with other parameters and bounce it round internally as appropriate) – BugFinder Aug 29 '12 at 19:13