kstrtouint(9)

✨ NAME ✨

kstrtouint — convert a string to an unsigned int. This is the kstrtouint(9) page from the Kernel API Manual, and bestie, we are literally turning a string into an unsigned int. Main character conversion energy ✨💅

🎀 SYNOPSIS 🎀

Here’s the exact signature, no edits, no cap:

int kstrtouint (const char *s , unsigned int base , unsigned int *res );

🌸 ARGUMENTS 🌸

• s — the start of the string. It must be null-terminated, and it may also include a single newline before its terminating null. The first character may also be a plus sign, but not a minus sign.

🚨 Caveat check: plus sign? allowed. Minus sign? not allowed. Periodt.

• base — the number base to use. The maximum supported base is 16. If base is given as 0, then the base of the string is automatically detected with the conventional semantics: if it begins with 0x, the number will be parsed as hexadecimal (case insensitive); if it otherwise begins with 0, it will be parsed as an octal number; otherwise it will be parsed as a decimal.
• res — where to write the result of the conversion on success. That’s the output spot, bestie 🎯

💅 DESCRIPTION 💅

Returns 0 on success, -ERANGE on overflow, and -EINVAL on parsing error. It’s preferred over simple_strtoul. The return code must be checked.

😭 Do not ghost that return code. Check it. Fr fr. The return code must be checked — that part is not a vibe suggestion.

🔥 SEE ALSO 🔥

Kernel file ./lib/kstrtox.c, plus these iconic little references:

• _parse_integer_limit(9)
• kstrtoull(9)
• kstrtoll(9)
• kstrtoint(9)
• kstrtobool(9)
• kstrtoudec64(9)
• kstrtodec64(9)

mwah 💋 source/version: ./lib, date: October 2026, page: kstrtouint(9). Bye bestie, go check that return code 🫶✨