UNIX for Advanced & Expert Users

Not posting your O/S and Shell details is driving me nuts!

We really need to know whether the O/S Shell can cope with numbers above 2147483647 ((2 x 1024 x 1024 x 1024) -1 ). i.e. a 32-bit O/S.
The unix bc command can cope with much larger numbers.

I give up.

My apologies, I was at work and trying to get this done in between things. Thanks for trying to help anyway!

I ended up just converting to GB and rounding up to the nearest whole number. Not ideal, but it will work for now. I will try to find out about my shell (bash) for future reference. Thanks again!

FWIW, this is bash 3.2.48 on OSX 10.7

Code:

$ echo $(( 2 ** 63 - 1 ))
9223372036854775807

So that was not the problem. I think the issue I that hdiutil is not reporting the exact number I am looking for.

Furthermore, I don't know enough to know if the uncompressed size of a dmg is exactly equivalent to the space on a partition required to be able to restore the image to that partition. Other than actually mounting the disk image and finding the size with diskutil or uncompressing each image, I don't know of its possible to get this info.