Get UUID of a device (without using blkid.h) using low-level C language?

Xeratul · 08-04-2017, 07:39 AM

Hello,

It is possible to get the UUID of an harddisk with blkid, which is a library to look in infos about devices.

There is here possible way using this library.
https://stackoverflow.com/questions/...ion-infomation

However this is not a code which can be universal and largely portable:

Code:

~$ gcc -o getuuid getuuid.c -lblkid
getuuid.c:4:25: fatal error: blkid/blkid.h: No such file or directory
 #include <blkid/blkid.h>
                         ^
compilation terminated.

Would you know a possible alternative to get UUID of a device (without using blkid.h) using low-level C language?

thank you

NevemTeve · 08-04-2017, 07:58 AM

Install package libblkid-dev
Or use popen("/sbin/blkid", "r")

Xeratul · 08-04-2017, 08:06 AM

Quote:

Originally Posted by NevemTeve

Install package libblkid-dev
Or use popen("/sbin/blkid", "r")

Thank you but it is not portable on any machines.

It shall work on any Unix platform, without the devel libraries of blkid.

syg00 · 08-04-2017, 08:16 AM

Hard disk devices don't have UUIDs

NevemTeve · 08-04-2017, 08:19 AM

use popen("/sbin/blkid", "r")

Xeratul · 08-04-2017, 08:29 AM

Quote:

Originally Posted by syg00

Hard disk devices don't have UUIDs

+1

Good point... https://social.technet.microsoft.com...m=winservergen

interesting

However MS Windows seems to have also a sort of UID

Windows developers are stating from above link as follows:

Quote:

Every hard disk has a unique ID stored in the hard disk. This is used to identify the hard disk. This is a 128-bit universally unique identifier (UUID). This field is used to associate a parent hard disk image with its differencing hard disk image(s).
Mountvol gives guid for the formated partion and VHD can have more than one of those.

(Visual C++ to get GUID)