how i can read n first bit command output in windows batch file?

Question

i use checksum command in my batch file and the output of command as follow :

69514a29dc44cd83b42658e917ed9baf *file.txt

i want to return checksum only so i should store it in variable without file.txt like

CHECKSUM=69514a29dc44cd83b42658e917ed9baf

how i can do this maybe write output of command to file then read this file ??? if yes how i can read just first 32 bits from file and store it in variable ????

score 3 · Accepted Answer · answered Mar 10 '11 at 10:39

3

You can use a sort of 'left'-function in batch:

set str=69514a29dc44cd83b42658e917ed9baf *file.txt
echo.%str%
set str=%str:~0,32%
echo.%str%

More info on string manipulation in dos/batch: Link

answered Mar 10 '11 at 10:39

Bart De Vos

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but if i want to store result from command itself how i can do this i try to do `set str=checksum file.txt` but not work – Mohammad AL-Rawabdeh Mar 10 '11 at 11:57
See: http://serverfault.com/questions/245679/store-output-of-windows-command-in-batch-file – Bart De Vos Mar 10 '11 at 14:15

how i can read n first bit command output in windows batch file?

1 Answers1