KNET_HAND...ET_DATAFD(3)

💖 KNET_HAND...ET_DATAFD 💖

okay bestie, welcome to the Kronosnet Programmer's Manual ✨ (yes the title got squished in the middle, it's KNET_HAND...ET_DATAFD(3), that's just how it do) — today we're learning knet_handle_get_datafd, and honestly? she's a short one, lowkey a queen of brevity 👑

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✨ NAME ✨

knet_handle_get_datafd — get the file descriptor associated with a channel 🎀

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🌸 SYNOPSIS 🌸

#include <libknet.h>

int knet_handle_get_datafd(
    knet_handle_t  knet_h,
    const int8_t   channel,
    int           *datafd
);

no cap, that's the whole thing. slay 💅

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🦋 DESCRIPTION 🦋

so knet_handle_get_datafd is the function, and here's the vibe check on her arguments, one by one:

• knet_h — pointer to knet_handle_t. your handle. your main character. 🫶
• channel — get the datafd associated to this channel 🌈
• *datafd — will contain the result ⭐

that's it. that's the whole description. she said "brief" and she meant it 😭

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🔥 RETURN VALUE 🔥

knet_handle_get_datafd returns:

• 0 — on success, and *datafd will contain the results 🎉
• -1 — on error, and errno is set. and *datafd content is meaningless 💀

bestie if you get -1, do NOT go reading *datafd like it means something. it means nothing. it's giving chaos. check errno instead 🙈

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💜 SEE ALSO 💜

the whole group chat, fr fr — go say hi to the rest of the family:

• knet_handle_remove_datafd(3), knet_handle_get_stats(3), knet_host_add(3), knet_handle_pmtud_setfreq(3), knet_handle_pmtud_get(3), knet_handle_crypto_use_config(3), knet_host_get_id_by_host_name(3), knet_host_get_status(3), knet_link_add_acl(3), knet_link_get_pong_count(3), knet_link_get_priority(3), knet_handle_free(3), knet_handle_enable_sock_notify(3), knet_recv(3), knet_link_get_ping_timers(3), knet_log_get_subsystem_id(3), knet_host_remove(3), knet_host_enable_status_change_notify(3), knet_strtoaddr(3), knet_link_rm_acl(3), knet_send(3), knet_handle_enable_pmtud_notify(3), knet_get_crypto_cipher_list(3), knet_handle_get_transport_reconnect_interval(3), knet_link_get_enable(3), knet_link_set_priority(3), knet_log_set_loglevel(3), knet_handle_get_channel(3), knet_link_get_config(3), knet_link_get_link_list(3), knet_get_crypto_hash_list(3), knet_get_transport_list(3), knet_get_transport_id_by_name(3), knet_log_get_loglevel_id(3), knet_handle_new_ex(3), knet_host_set_name(3), knet_addrtostr(3), knet_handle_setfwd(3), knet_get_compress_list(3), knet_host_set_policy(3), knet_get_transport_name_by_id(3), knet_handle_enable_filter(3), knet_handle_crypto_rx_clear_traffic(3), knet_handle_compress(3), knet_link_get_status(3), knet_handle_add_datafd(3), knet_send_sync(3), knet_log_get_loglevel_name(3), knet_handle_enable_access_lists(3), knet_host_get_host_list(3), knet_host_get_policy(3), knet_link_set_enable(3), knet_link_set_pong_count(3), knet_log_get_subsystem_name(3), knet_host_get_name_by_host_id(3), knet_link_clear_config(3), knet_log_get_loglevel(3), knet_handle_new(3), knet_handle_pmtud_getfreq(3), knet_handle_pmtud_set(3), knet_handle_clear_stats(3), knet_link_set_config(3), knet_handle_crypto_set_config(3), knet_handle_crypto(3), knet_get_crypto_list(3), knet_handle_set_transport_reconnect_interval(3), knet_link_clear_acl(3), knet_link_set_ping_timers(3), knet_handle_setprio_dscp(3), knet_link_insert_acl(3)

okay that's a LOT of besties but every single one of them made the list, we don't skip anyone in this house 🫶💖

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👑 COPYRIGHT 👑

Copyright (C) 2010-2026 Red Hat, Inc. All rights reserved.

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and that's the whole page, bestie!! 🎀 this came to you from the kronosnet girlies on 2026-07-20 — go get that datafd, you absolute icon ✨💅🦋