How get uuid of a device/partition in linux programatically?

[newtoqtlinux]

Hi..Friends,
I am very much new to Linux programming. My question is Is there any way to read UUID of a device or partition in linux programatically. Is there any c/c++ API for user-space applications. I found some commands "sudo vol_id --uuid /dev/sda1", "sudo blkid", "ls -l /dev/disk/by-uuid/". But all are commands which we need to run in terminal. But i need to achieve this from a c/c++ program. Can some one help me in this problem.(FYI: I need to read uuid of root filesystem ("/") where Linux has been installed.)

Thank you in advance.

[Rubberman]

These two headers (and the associated libraries) have functions that may work for you:

/usr/include/hal/libhal-storage.h
    const char  *libhal_volume_get_partition_uuid(LibHalVolume *volume);
    const char  *libhal_volume_get_uuid(LibHalVolume *volume);

/usr/include/glib-2.0/gio/gmount.h
    char  *g_mount_get_uuid(GMount *mount);

There may be better options, but I don't know what they would be offhand.