pipe_has_watch_queue(9)

💅 pipe_has_watch_queue(9) — Kernel API Manual ✨

okay so bestie, welcome to the <pink>pipe_has_watch_queue(9)</pink> page 💖 this is a Kernel API Manual moment, and honestly? it's a short one, so grab your lil iced coffee and let's go 🧚

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🌸 NAME 🌸

pipe_has_watch_queue — check whether the pipe is a watch_queue, i.e. it was created with O_NOTIFICATION_PIPE 👑

that's it. that's the whole vibe check. she's asking one (1) question and she wants a yes or a no, no essay required 🫶

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✨ SYNOPSIS ✨

bool pipe_has_watch_queue (const struct pipe_inode_info *pipe );

literally one line, one function, one bool return. iconic behavior ngl 🌈

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🎀 ARGUMENTS 🎀

• pipe — the pipe to check 👀 like, the actual pipe you're curious about. hand her the const struct pipe_inode_info * and she'll tell you what's up.

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⭐ RETURN ⭐

• true if pipe is a watch queue 🌸
• false otherwise 💀

no cap, that's the entire return contract. it's giving "simple and honest" and we love that for her 💜

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🦋 SEE ALSO 🦋

all the sibling pages, the whole friend group, the group chat if you will 🫶 — and heads up, these live in the kernel file ./include/linux/pipe_fs_i.h:

• struct pipe_buffer(9)
• union pipe_index(9)
• struct anon_pipe_prealloc(9)
• struct pipe_inode_info(9)
• pipe_occupancy(9)
• pipe_empty(9)
• pipe_full(9)
• pipe_is_full(9)
• pipe_is_empty(9)
• pipe_buf_usage(9)
• pipe_buf(9)
• pipe_head_buf(9)
• pipe_buf_get(9)
• pipe_buf_release(9)
• pipe_buf_confirm(9)
• pipe_buf_try_steal(9)

go read them, they're all lowkey obsessed with pipes too 🙈

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ngl this page is short enough to read twice. main character energy for a one-line check, fr fr 💅

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and that's the whole page, bestie 🎀 mwah 💋 — brought to you from ./include/linux, dated October 2026, and filed under pipe_has_watch_queue(9) ⭐ that's a wrap, slay 💖