bpf_strspn(9)

bpf_strspn(9) — Kernel API Manual, but make it a vibe 💅

okay so bestie, this is the bpf_strspn(9) page from the Kernel API Manual, and we are keeping every single detail. no cap.

✨ NAME ✨

bpf_strspn — calculate the length of the initial substring of @s__ign which only contains letters in @accept__ign

🌸 SYNOPSIS 🌸

__bpf_kfunc int bpf_strspn (const char *s__ign , const char *accept__ign
);

🎀 ARGUMENTS 🎀

• s__ign — the string to be searched 🫶
• accept__ign — the string to search for 🔍

🔥 RETURN 🔥

• >=0 — the length of the initial substring of s__ign which only contains letters from accept__ign ✨
• -EFAULT — cannot read one of the strings 😭
• -E2BIG — one of the strings is too large 😳
• -ERANGE — one of the strings is outside of kernel address space 💀

💜 SEE ALSO 💜

Kernel file ./kernel/bpf/helpers.c

the whole squad, fr fr:

• bpf_obj_new(9)
• bpf_percpu_obj_new(9)
• bpf_obj_drop(9)
• bpf_percpu_obj_drop(9)
• bpf_refcount_acquire(9)
• bpf_list_push_front(9)
• bpf_list_push_back(9)
• bpf_rbtree_add(9)
• bpf_task_acquire(9)
• bpf_task_release(9)
• bpf_cgroup_acquire(9)
• bpf_cgroup_release(9)
• bpf_cgroup_ancestor(9)
• bpf_cgroup_from_id(9)
• bpf_task_under_cgroup(9)
• bpf_task_get_cgroup1(9)
• bpf_task_from_pid(9)
• bpf_task_from_vpid(9)
• bpf_dynptr_slice(9)
• bpf_dynptr_slice_rdwr(9)
• bpf_dynptr_copy(9)
• bpf_dynptr_memset(9)
• bpf_iter_bits_new(9)
• bpf_iter_bits_next(9)
• bpf_iter_bits_destroy(9)
• bpf_copy_from_user_str(9)
• bpf_copy_from_user_task_str(9)
• bpf_strcmp(9)
• bpf_strcasecmp(9)
• bpf_strnchr(9)
• bpf_strchr(9)
• bpf_strchrnul(9)
• bpf_strrchr(9)
• bpf_strnlen(9)
• bpf_strlen(9)
• bpf_strcspn(9)
• bpf_strstr(9)
• bpf_strcasestr(9)
• bpf_strnstr(9)
• bpf_strncasestr(9)
• bpf_lookup_user_key(9)
• bpf_lookup_system_key(9)
• bpf_key_put(9)
• bpf_verify_pkcs7_signature(9)
• bpf_task_work_schedule_signal(9)
• bpf_task_work_schedule_resume(9)
• bpf_timer_cancel_async(9)

okay that's the page!! footer vibes: source/version lives at ./kernel/bpf, and the date is October 2026. mwah 💋💖