macOS Locating Disk Geometry

[jimmiller962]

I have been assigned a project to port an internal Windows and Linux utility to OS X. All has gone well up to this point, however, I have the requirement to locate the disk geometry for any given disk... which I am unable to locate. I expected to find an ioctl or deviceio function to grab this information, but so far nothing. I suspect I am overlooking something simple, but just can't find what I am missing.

Thoughts? Suggestions? Any help, even a nudge in the right direction would be greatly appreciated!

Thanks,
Jim

After further research I have located DIOCGDINFO, which seems like it should grab the correct info. I have located the definitions in disklabel.h, which is buried deep in System/Library/Frameworks/Kernal.framework/Versions/A/Headers/sys/disklabel.h, unfortunately I am unable to locate a form of #include that finds the file. For example, the following all fail:

#include <disklabel.h>
#include <sys/disklabel.h>, and even
#include <System/Library/Frameworks/Kernal.framework/Versions/A/Headers/sys/disklabel.h>

Of 10+ include files this is the only one that is eluding capture.

Thoughts?

 

[chown33]

FWIW, you've misspelled "Kernel". It contains no a's.

#include <System/Library/Frameworks/Kernal.framework/Versions/A/Headers/sys/disklabel.h>

This is a relative path, not an absolute path. It's also enclosed in <>'s which means "search system directories". Double-quotes should be used for an absolute path.

I'm not saying this will fix things, just listing the most obvious errors.

 

[Catfish_Man]

Well, it'd be Kernel, not Kernal... but even then it might only be accessible from a kext; not sure.