'\" t .\" Title: uuid_is_null .\" Author: [see the "AUTHOR(S)" section] .\" Generator: Asciidoctor 2.0.15 .\" Date: 2022-01-06 .\" Manual: Programmer's Manual .\" Source: util-linux 2.37.4 .\" Language: English .\" .TH "UUID_IS_NULL" "3" "2022-01-06" "util\-linux 2.37.4" "Programmer\(aqs Manual" .ie \n(.g .ds Aq \(aq .el .ds Aq ' .ss \n[.ss] 0 .nh .ad l .de URL \fI\\$2\fP <\\$1>\\$3 .. .als MTO URL .if \n[.g] \{\ . mso www.tmac . am URL . ad l . . . am MTO . ad l . . . LINKSTYLE blue R < > .\} .SH "NAME" uuid_is_null \- compare the value of the UUID to the NULL value .SH "SYNOPSIS" .sp \fB#include \fP .sp \fBint uuid_is_null(uuid_t \fIuu\fP);\fP .SH "DESCRIPTION" .sp The \fBuuid_is_null\fP() function compares the value of the supplied UUID variable \fIuu\fP to the NULL value. If the value is equal to the NULL UUID, 1 is returned, otherwise 0 is returned. .SH "AUTHORS" .sp Theodore Y. Ts\(cqo .SH "SEE ALSO" .sp \fBuuid\fP(3), \fBuuid_clear\fP(3), \fBuuid_compare\fP(3), \fBuuid_copy\fP(3), \fBuuid_generate\fP(3), \fBuuid_time\fP(3), \fBuuid_parse\fP(3), \fBuuid_unparse\fP(3) .SH "REPORTING BUGS" .sp For bug reports, use the issue tracker at \c .URL "https://github.com/karelzak/util\-linux/issues" "" "." .SH "AVAILABILITY" .sp The \fBlibuuid\fP library is part of the util\-linux package since version 2.15.1. It can be downloaded from \c .URL "https://www.kernel.org/pub/linux/utils/util\-linux/" "Linux Kernel Archive" "."