sysfs_update_groups(9)

💅 sysfs_update_groups — the <italic>sysfs_update_groups(9)</italic> glow-up page 💅

okay bestie, buckle up, because this is a page straight out of the Kernel API Manual and it's honestly lowkey iconic 🦋

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🌸 NAME 🌸

sysfs_update_groups — given a directory kobject, create a bunch of attribute groups ✨

(yeah. that's the whole vibe. a directory kobject walks in and leaves with a whole entourage of attribute groups. main character energy fr fr 👑)

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🎀 SYNOPSIS 🎀

int sysfs_update_groups (struct kobject *kobj , const struct
       attribute_group *const *groups );

that's the signature, copy it exactly, do not come for me about the spacing, it's giving "the kernel formats things its own way" 😭

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🦋 ARGUMENTS 🦋

• kobj — the kobject you're updating the group on. this is the lil directory you're doing the makeover on 💖
• groups — the attribute groups you're updating, and listen, this list is NULL terminated, okay? don't forget the NULL or it's gonna keep walking and walking and it will NOT be cute 🙈

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✨ DESCRIPTION ✨

so what does it actually do? it updates a bunch of attribute groups. simple as that 💅

but here's the part you actually need to know, bestie — pay attention because this is the plot twist 😭:

if an error occurs when updating a group, all previously updated groups will be removed together with already existing (not updated) attributes.

like… it's all-or-nothing. no half-finished makeover. if one group throws a fit, everything gets rolled back and the not-updated stuff gets caught in the crossfire too. catastrophic? no. thorough. 🔥

and the return value:

• 0 on success 🎉
• otherwise, the error code from sysfs_update_group on failure 💀

that's it. that's the function. ate and left no crumbs 🍓

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🌈 SEE ALSO 🌈

• Kernel file ./fs/sysfs/group.c
• sysfs_create_group(9)
• sysfs_create_groups(9)
• sysfs_update_group(9)
• sysfs_remove_group(9)
• sysfs_remove_groups(9)
• sysfs_merge_group(9)
• sysfs_unmerge_group(9)
• sysfs_add_link_to_group(9)
• sysfs_remove_link_from_group(9)
• compat_only_sysfs_link_entry_to_kobj(9)
• sysfs_group_change_owner(9)
• sysfs_groups_change_owner(9)

like a whole friend group honestly. they all show up together, iykyk 🫶

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mwah 💋 that's the page!! this came straight out of ./fs/sysfs and it's dated October 2026, so screenshot it, study it, love it, and go update those groups responsibly bestie 🧚💜