uuid_is_null

UUID_IS_NULL(3)               Programmer's Manual              UUID_IS_NULL(3)

NAME
       uuid_is_null - compare the value of the UUID to the NULL value

SYNOPSIS
       #include <uuid.h>

       int uuid_is_null(uuid_t uu);

DESCRIPTION
       The uuid_is_null() function compares the value of the supplied UUID
       variable uu to the NULL value. If the value is equal to the NULL UUID,
       1 is returned, otherwise 0 is returned.

AUTHORS
       Theodore Y. Ts'o

SEE ALSO
       uuid(3), uuid_clear(3), uuid_compare(3), uuid_copy(3),
       uuid_generate(3), uuid_time(3), uuid_parse(3), uuid_unparse(3)

REPORTING BUGS
       For bug reports, use the issue tracker at
       https://github.com/karelzak/util-linux/issues.

AVAILABILITY
       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/>.

util-linux 2.37.2                 2021-06-02                   UUID_IS_NULL(3)