xt_check_proc_name(9)

✨ xt_check_proc_name(9) ✨

okay so bestie, we're in the Kernel API Manual today and this one's a little function with a big job 💅

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🌸 NAME 🌸

xt_check_proc_name — literally just here to check that name is suitable for /proc file creation 🫶

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🎀 SYNOPSIS 🎀

int xt_check_proc_name (const char *name , unsigned int size );

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💖 ARGUMENTS 💖

• name — the file name candidate, like the lil' name your file wants to have 🥺
• size — length of buffer, aka how much room we're working with 📏

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🦋 DESCRIPTION 🦋

so some x_tables modules are out here wishing to create a file in /proc, right? and this function is the vibe check for that 🌈 it makes sure the name is actually suitable for this purpose — it checks that name is NUL terminated ✅ and that it isn't a 'special' name, like ".." 💀 (yes, the classic chaos pick, we are NOT letting that through).

returns a negative number on error, or 0 if name is useable 👑

fr fr, negative = not it, 0 = slay, it's useable 💅

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🔥 SEE ALSO 🔥

Kernel file ./net/netfilter/x_tables.c plus the whole friend group: xt_check_entry_offsets(9), xt_alloc_entry_offsets(9), xt_find_jump_offset(9), xt_copy_counters(9), xt_unregister_table_pre_exit(9), xt_unregister_table_exit(9), xt_hook_ops_alloc(9), xt_percpu_counter_alloc(9) 🧚

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okay that's the whole page bestie, no gatekeeping 💜 this one's living in ./net/netfilter and it's dated October 2026 — iconic of it, honestly. go forth and validate your proc names 😭🌸