nbd_clear_debug_callback(3)

✨ nbd_clear_debug_callback — clear the debug callback ✨

okay so this is a libnbd manpage, bestie — the library is called LIBNBD and this little function is nbd_clear_debug_callback(3). it's short, it's sweet, it's giving "one job and it does it" 💅

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🌸 SYNOPSIS 🌸

#include <libnbd.h>

int nbd_clear_debug_callback (
      struct nbd_handle *h
    );

literally that's it. one handle, one int back. no cap 🫶

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💖 DESCRIPTION 💖

so here's the tea: this function removes the debug callback if one was previously associated with the handle — and it gets associated via nbd_set_debug_callback(3), iykyk.

and if no callback was ever associated? it does nothing. no drama, no error, just vibes ✨ it's the "you're uninvited from the group chat but you were never in it" of C functions.

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🎀 RETURN VALUE 🎀

if the call is successful, the function returns 0. slay. 👑

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🔥 ERRORS 🔥

on error, -1 is returned. 😭

for how to get further details of the error, refer to "ERROR HANDLING" in libnbd(3) — that's where the lore lives.

also important, and I mean important: the following parameters must not be NULL: "h". like, do not. for more info see "Non-NULL parameters" in libnbd(3).

🫶 friendly reminder from your girl: passing NULL for h is a no-no, the manpage said so, not me.

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⭐ VERSION ⭐

this function first appeared in libnbd 1.0. iconic behavior, honestly.

if you need to test whether this function is available at compile time, check if the following macro is defined:

#define LIBNBD_HAVE_NBD_CLEAR_DEBUG_CALLBACK 1

that's your vibe check for the preprocessor, bestie 🦋

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🌈 SEE ALSO 🌈

• nbd_create(3)
• nbd_set_debug_callback(3)
• libnbd(3)

go read them, they're all part of the same friend group 💜

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👑 AUTHORS 👑

• Eric Blake
• Richard W.M. Jones

legends, both of them. fr fr.

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💜 COPYRIGHT 💜

Copyright Red Hat

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🧚 LICENSE 🧚

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

💀 and yeah — that's the whole license, all of it, every word. legal girlies don't skip lines. periodt.

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and that's the whole page, bestie 🎀 this was libnbd-1.25.8, dated 2026-10-13, and the page itself is nbd_clear_debug_callback(3) — mwah, talk later 💖🌸