set_cgroup_xattr(9)

💅 set_cgroup_xattr(9) 💅

okay so bestie, welcome to the Kernel API Manual entry for set_cgroup_xattr — yes that's the whole (9) situation, it's a kernel-space girlie ✨

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🌸 NAME 🌸

set_cgroup_xattr — literally just sets an xattr on a cgroup dir, that's the whole vibe 🎀

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✨ SYNOPSIS ✨

int set_cgroup_xattr (const char *relative_path , const char *name ,
       const char *value );

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🦋 ARGUMENTS 🦋

• relative_path — the cgroup path, relative to the workdir, where you wanna set the xattr. so like, relative relative, not the whole absolute novel 📍
• name — the xattr name, iykyk 🏷️
• value — the xattr value, the actual content, the main character of the attribute 💖

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👑 DESCRIPTION 👑

This function sets an xattr on a cgroup dir. Periodt. That's it, that's the function 💅

On success, it returns 0. Otherwise, on failure, it returns -1. no cap 🫶

lowkey important: 0 = slay, -1 = it's giving error, go check yourself 🙈

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🌈 SEE ALSO 🌈

Kernel file ./tools/testing/selftests/bpf/cgroup_helpers.c — the source of truth, go read it bestie 📖

and the whole friend group 💜:

• enable_controllers(9)
• write_cgroup_file(9)
• write_cgroup_file_parent(9)
• setup_cgroup_environment(9)
• join_cgroup(9)
• join_root_cgroup(9)
• join_parent_cgroup(9)
• __cleanup_cgroup_environment(9)
• cleanup_cgroup_environment(9)
• get_root_cgroup(9)
• create_and_get_cgroup(9)
• get_cgroup_id_from_path(9)
• setup_classid_environment(9)
• set_classid(9)
• join_classid(9)
• cleanup_classid_environment(9)
• get_classid_cgroup_id(9)
• get_cgroup1_hierarchy_id(9)
• open_classid(9)

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okay that's the whole page, mwah 💋 this icon lives in ./tools/testing/selftests/bpf and it's dated October 2026 — yes, future girlie behavior, we love to see it ⭐🦋 see u in the next manpage bestie 🫶💖