ethtool_puts(9)

💖 ethtool_puts — aka ethtool_puts(9), from the Kernel API Manual ✨

okay so bestie, welcome to the ethtool string-writing corner of the kernel 🌸 this one lives in the Kernel API Manual and honestly? it's giving tiny-but-essential. like a little fairy 🧚 that just drops a string in place and moves on. no cap.

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✨ NAME ✨

ethtool_puts — write string to ethtool string data 🎀

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🦋 SYNOPSIS 🦋

void ethtool_puts (u8 **data , const char *str );

like, that's the whole signature. two args. that's it. that's the vibe. 💅

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🌸 ARGUMENTS 🌸

• data — pointer to a pointer to the start of the string you're gonna update 👀 yes, it's a u8 **, it's double-pointer hours, we love a little indirection
• str — the string you actually want to write 💖

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🔥 DESCRIPTION 🔥

So here's the tea ☕: this bad boy writes str into *data without a trailing newline — no sneaky \n sneaking in, periodt. then it updates *data so it points at the start of the next string, meaning you can just keep calling it and it keeps walking forward 🚶‍♀️✨ it's giving conveyor belt, it's giving main character energy.

And lowkey an important note: prefer this function to ethtool_sprintf when you're only given two arguments, or if fmt is literally just "s" 👑 like, don't make ethtool_sprintf do the work when ethtool_puts exists. let her shine. 💅

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👑 SEE ALSO 👑

alright bestie, buckle up, this list is long — but every single one of these is part of the family and we're not skipping a single one 🫶

Kernel file ./include/linux/ethtool.h, plus:

• enum ethtool_phys_id_state(9)
• struct kernel_ethtool_ringparam(9)
• enum ethtool_supported_ring_param(9)
• ethtool_rxfh_indir_default(9)
• struct ethtool_rxfh_context(9)
• ethtool_link_ksettings_zero_link_mode(9)
• ethtool_link_ksettings_add_link_mode(9)
• ethtool_link_ksettings_del_link_mode(9)
• ethtool_link_ksettings_test_link_mode(9)
• ethtool_intersect_link_masks(9)
• struct ethtool_phy_stats(9)
• struct ethtool_pause_stats(9)
• struct ethtool_fec_hist_range(9)
• struct ethtool_fec_stats(9)
• struct ethtool_rmon_hist_range(9)
• struct ethtool_rmon_stats(9)
• struct ethtool_ts_stats(9)
• struct ethtool_module_eeprom(9)
• struct ethtool_module_power_mode_params(9)
• struct ethtool_mm_state(9)
• struct ethtool_mm_cfg(9)
• struct ethtool_mm_stats(9)
• struct ethtool_mmsv_ops(9)
• struct ethtool_mmsv(9)
• struct ethtool_rxfh_param(9)
• struct ethtool_rxfh_fields(9)
• struct kernel_ethtool_ts_info(9)
• struct ethtool_ops(9)
• struct ethtool_netdev_state(9)
• struct ethtool_phy_ops(9)
• ethtool_set_ethtool_phy_ops(9)
• ethtool_params_from_link_mode(9)
• ethtool_get_phc_vclocks(9)
• ethtool_mm_frag_size_add_to_min(9)
• ethtool_mm_frag_size_min_to_add(9)
• ethtool_get_ts_info_by_layer(9)
• ethtool_sprintf(9)
• ethtool_cpy(9)

like… that's the whole extended friend group 😭 iykyk 🌈

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ngl there's nothing dangerous here — it's just a string copy with a pointer bump 🍓 but don't forget the no-newline thing, fr fr, because that's literally the whole personality of this function 💀

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and that's the page!! 🌟 source: ./include/linux, dated October 2026 — mwah, bye bestie, go write some strings 💜🫶🎀