read_version(9)

🎀 read_version(9) — Kernel API Manual 🎀

✨ NAME ✨

read_version — read handler for "ipe/policies/$name/version". okay so bestie, that's the whole assignment: this is the read-handler bestie for that exact path, and it's serving securityfs realness 💅

🌸 SYNOPSIS 🌸

ssize_t read_version (struct file *f , char __user *data , size_t len ,
loff_t *offset );

🫶 ARGUMENTS 🫶

• f — supplies a file structure representing the securityfs node. yes ma'am, that kind of file structure.
• data — supplies a buffer passed to the write syscall. (the page says write syscall, and I'm not gonna edit the vibe 🙈)
• len — supplies the length of data.
• offset — unused. literally just sitting there, unbothered ✨

💖 DESCRIPTION 💖

on success, data will be populated with the version string. the way that's the entire plot is so iconic 😌

⭐ RETURN ⭐

• Length of buffer written — Success 👑
• -ENOENT — Policy initializing/deleted 😭

🦋 SEE ALSO 🦋

• Kernel file ./security/ipe/policy_fs.c, struct ipefs_file(9)
• read_pkcs7(9)
• read_policy(9)
• read_name(9)
• setactive(9)
• getactive(9)
• update_policy(9)
• delete_policy(9)
• ipe_del_policyfs_node(9)
• ipe_new_policyfs_node(9)

mwah 💋 — this read_version(9) page comes from source/version ./security/ipe and is dated October 2026. slay, bestie, bye 🎀