Putting IF condition in batch file?

I want to check if space in C: drive is more than 60 GB then next step should be done and if space is less it should display a message?

For checking the disk space i can use "fsutil volume diskfree c:" but i dont know how to use it inside the above condition开发者_开发知识库.

Assuming you are fine with treating 1 GB as 10⁹ bytes, not as 2³⁰ bytes, you could simply

1) pipe the results of FSUTIL to the FIND utility to filter out irrelevant rows,

2) use the modified command line in a FOR /F loop to store the output into a variable,

3) cut off the last 9 characters from the variable's value and compare the rest to the required quantity.

And here's my attempt at putting the above steps together:

@ECHO OFF
SET required=60
FOR /F "tokens=2 delims=:" %%A IN ('fsutil volume diskfree c: ^| find "# of bytes"') DO SET "space=%%A"
IF %space:~0,-9% LSS %required% ECHO Space is less than %required% GB!

The above script processes the total space. If you want to check the free space, change "# of bytes" to "# of free".

Basic IF reading : http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/batch.mspx?mfr=true

similar blog post here : http://fei-automation.blogspot.com/2011/02/how-to-monitor-free-space-of-group-of.html

similar SO : Free space in a CMD shell