match_u64(9)

🎀 NAME 🎀

okay bestie, this page is match_u64(9) from the Kernel API Manual — yes, the manual name is folded right in, we're doing that. the name line is literally:

match_u64 - scan a decimal representation of a u64 from a substring_t

so the whole job is scanning a decimal representation of a u64 out of a substring_t. iconic.

---

✨ SYNOPSIS ✨

int match_u64 (substring_t *s , u64 *result );

---

🫶 ARGUMENTS 🫶

• s — the substring_t to be scanned. that's the substring bestie in question.
• result — the resulting unsigned long long on success. this is where the parsed number lands when it slays.

---

🌈 DESCRIPTION 🌈

okay so the plot of this function: it attempts to parse the substring_t s as a long decimal integer. decimal representation of a u64, pulled out of a substring — that's the whole vibe. no extra plot twists.

---

💖 RETURN 💖

on success, it sets result to the integer represented by the string and returns 0. clean.

on failure, it returns -EINVAL or -ERANGE. those are the failure codes, periodt. don't ignore them.

---

🦋 SEE ALSO 🦋

kernel file ./lib/parser.c is the home base, and these linked besties are:

• match_one(9)
• match_token(9)
• match_number(9)
• match_u64int(9)
• match_int(9)
• match_uint(9)
• match_octal(9)
• match_hex(9)
• match_wildcard(9)
• match_strlcpy(9)
• match_strdup(9)

---

mwah 💋 source/version: ./lib; date: October 2026. that's the footer energy, bestie — go scan that decimal and slay. 💅✨