UUID_COMPARE(3) Programmer's Manual UUID_COMPARE(3)

uuid_compare - compare whether two UUIDs are the same

#include <uuid.h>

int uuid_compare(uuid_t uu1, uuid_t uu2 )

The uuid_compare() function compares the two supplied uuid variables uu1 and uu2 to each other.

Returns an integer less than, equal to, or greater than zero if uu1 is found, respectively, to be lexicographically less than, equal, or greater than uu2.

Theodore Y. Ts’o

uuid(3), uuid_clear(3), uuid_copy(3), uuid_generate(3), uuid_is_null(3), uuid_parse(3), uuid_unparse(3)

The libuuid library is part of the util-linux package since version 2.15.1. It can be downloaded from Linux Kernel Archive https://www.kernel.org/pub/linux/utils/util-linux/.
2021-06-02 util-linux 2.37.2