provide_user_output(9)

💅 provide_user_output(9) — the Kernel API Manual, bestie edition ✨

okay so picture this: you're poking around in debugfs and you need to hand a little something back to whoever's reading. That's literally what this function is for. It lives in provide_user_output(9) and honestly? iconic.

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🌸 NAME 🌸

provide_user_output — bestie, it provides output to the user reading a debugfs file. that's the whole vibe. 🎀

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✨ SYNOPSIS ✨

int provide_user_output (int val , char __user *u , size_t count ,
       loff_t *ppos );

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🫶 ARGUMENTS 🫶

• val — a boolean value for the answer 💖
• u — the buffer to store the answer at
• count — size of the buffer
• ppos — position in the u output buffer

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💅 DESCRIPTION 💅

so this is a simple little helper function, no cap. it stores the val boolean value into the user buffer when the user reads one of the UBIFS debugfs files. that's it, that's the job. 🦋

it returns the amount of bytes written to u in case of success, and a negative error code in case of failure. periodt. 😭

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🔥 SEE ALSO 🔥

Kernel file ./fs/ubifs/debug.c — go read it, iykyk 👑

• ubifs_dump_index(9)
• dbg_save_space_info(9)
• dbg_check_space_info(9)
• dbg_check_synced_i_size(9)
• dbg_check_key_order(9)
• dbg_check_znode(9)
• dbg_check_tnc(9)
• dbg_walk_index(9)
• add_size(9)
• dbg_check_idx_size(9)
• struct fsck_inode(9)
• struct fsck_data(9)
• add_inode(9)
• search_inode(9)
• read_add_inode(9)
• check_leaf(9)
• free_inodes(9)
• check_inodes(9)
• dbg_check_filesystem(9)
• dbg_check_data_nodes_order(9)
• dbg_check_nondata_nodes_order(9)
• interpret_user_input(9)
• dbg_debugfs_init_fs(9)
• dbg_debugfs_exit_fs(9)
• dbg_debugfs_init(9)
• dbg_debugfs_exit(9)
• ubifs_debugging_init(9)
• ubifs_debugging_exit(9)

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💖 and that's the page!! 💖 it's from ./fs/ubifs, dated October 2026, and it's provide_user_output(9) forever. slay, bye bestie!! 🌈💜🎀