__d_path(9)

💅 __d_path(9) — like, the Kernel API Manual page, bestie

okay so welcome to the __d_path(9) glow-up ✨ this is the Kernel API Manual entry and it's literally about turning a dentry into a path name, no cap.

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🦋 SYNOPSIS

char * __d_path (const struct path *path , const struct path *root ,
       char *buf , int buflen );

that's the whole signature, character for character, don't @ me 🙈

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🌸 ARGUMENTS

• path — the dentry/vfsmount you wanna report on 👀 like the thing we're describing
• root — the root vfsmnt/dentry, aka where we start looking from
• buf — the buffer where the return value goes 🎀 it's giving "put the answer here"
• buflen — how long that buffer is, in case you were wondering 💅

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✨ DESCRIPTION ✨

so basically: convert a dentry into an ASCII path name. that's the whole vibe. 🫶

it returns a pointer into the buffer — or, plot twist 😭, an error code if the path was too long.

"buflen" should be positive. like, highkey a requirement, don't be weird about it.

and if the path is not reachable from the supplied root, it returns NULL. that's it. that's the tea. ☕ no path for you, bestie.

real talk: those NULL and error-code returns are the whole personality of this function — check them, or you're gonna have a bad time 💀

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⭐ SEE ALSO

• Kernel file ./fs/d_path.c
• prepend_name(9)
• prepend_path(9)
• d_path(9)

go read those too, iykyk 🧚

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and that's the page!! 🌈 brought to you by ./fs and dated October 2026 — mwah, stan the kernel, see u in the next manpage 👑💖