strtobool(9)

hii bestie!! welcome to the Kernel API Manual page for strtobool(9) 💅✨ this one’s short, sweet, and literally here to turn common user inputs into boolean values 🦋

💖 NAME 💖

strtobool — convert common user inputs into boolean values 👑

✨ SYNOPSIS ✨

int strtobool (const char *s , bool *res );

🎀 ARGUMENTS 🎀

• s — input string 🍓
• res — result 🎯

🌸 DESCRIPTION 🌸

okay so here’s the tea: this routine returns 0 iff the first character is one of 'Yy1Nn0', or [oO][NnFf] for "on" and "off". Otherwise it will return -EINVAL. the value pointed to by res is updated upon finding a match 💖

no match? -EINVAL says hi 😭 match? res gets the update, periodt ✨

🌈 SEE ALSO 🌈

• Kernel file ./tools/lib/string.c 📁
• memdup(9) 🧚
• strlcpy(9) 🎀
• skip_spaces(9) 🦋
• strim(9) 🌸
• strreplace(9) 💜
• memchr_inv(9) ⭐

mwah 💋 — source/version ./tools/lib, dated October 2026, for strtobool(9). bye bestie, slay your booleans 🫶💅