UUID_IS_NULL(3)

💖 uuid_is_null(3) — bestie edition 💖

Manual name: UUID_IS_NULL(3) · this is the Programmers Manual page, and it’s giving tiny-but-iconic 💅

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✨ NAME ✨

uuid_is_null — compare the value of the UUID to the NULL value 🎀

🌸 SYNOPSIS 🌸

okay so first you bring the include, then the function:

#include <uuid.h>

int uuid_is_null(const uuid_t uu);

🦋 DESCRIPTION 🦋

okay so 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. that’s the whole vibe check, no cap 🌈

👑 AUTHORS 👑

This icon: Theodore Y. Ts’o 👑

🔥 SEE ALSO 🔥

go read these too, bestie, iykyk:

• 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 🐛

found a bug? (not the cute kind 😭) For bug reports, use the issue tracker: https://github.com/util-linux/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/ ⭐

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mwah 💋 source/version: util-linux 2.41.6 · date: 2026-08-31 · manual: UUID_IS_NULL(3) — bye bestie, go compare those UUIDs 🫶