pdcs_osdep1_write(9)

💅 pdcs_osdep1_write(9) — like, the whole vibe

okay bestie, so this is a page straight outta the Kernel API Manual and it's all about pdcs_osdep1_write(9) — the function that takes in the OS-Dependent data area 1 for Stable Storage. yes it's niche. yes it's iconic. let's get into it 🫶

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✨ SYNOPSIS ✨

ssize_t pdcs_osdep1_write (struct kobject *kobj , struct kobj_attribute
*attr , const char *buf , size_t count );

bestie look at that return type. ssize_t. slay. 💅

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🌸 ARGUMENTS 🌸

four little besties walk into a function:

• kobj — the kobject that's used to share data with userspace. it's giving main character energy, it's the whole reason y'all are talking 💖
• attr — the kobject attributes. the ~vibes~ of the object, if you will ✨
• buf — the input buffer you read from. the actual tea gets poured in here 🍓
• count — the number of bytes to be read. literally just counting. someone's gotta do it 🙈

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🎀 DESCRIPTION 🎀

okay so here's the lore: this thing can store 16 bytes of OS-Dependent data. sixteen. not fifteen, not seventeen, sixteen. periodt 💀

and the way it does it? byte-by-byte writes. one byte at a time, no cap. it's not gonna batch it for you, it's not gonna be fancy about it — it's just gonna chomp through it one byte at a time like a very determined little guy 🧚

and bestie, hear me on this one: it's up to userspace to deal with it when constructing its input buffer. the kernel is not holding your hand here. you build the buffer, you own the buffer. iykyk 😭

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🌈 SEE ALSO 🌈

the whole friend group, fr fr:

• Kernel file ./drivers/parisc/pdc_stable.c
• pdcspath_fetch(9)
• pdcspath_store(9)
• pdcspath_hwpath_read(9)
• pdcspath_hwpath_write(9)
• pdcspath_layer_read(9)
• pdcspath_layer_write(9)
• pdcspath_attr_show(9)
• pdcspath_attr_store(9)
• pdcs_size_read(9)
• pdcs_auto_read(9)
• pdcs_autoboot_read(9)
• pdcs_autosearch_read(9)
• pdcs_timer_read(9)
• pdcs_osid_read(9)
• pdcs_osdep1_read(9)
• pdcs_diagnostic_read(9)
• pdcs_fastsize_read(9)
• pdcs_osdep2_read(9)
• pdcs_auto_write(9)
• pdcs_autoboot_write(9)
• pdcs_autosearch_write(9)
• pdcs_osdep2_write(9)
• pdcs_register_pathentries(9)
• pdcs_unregister_pathentries(9)

no gatekeeping here, they're all tagged in the group chat 👑

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and that's the whole page, bestie 🦋 this one lives over in ./drivers/parisc, stamped October 2026, and it's filed under pdcs_osdep1_write(9) in the Kernel API Manual — go off, read the source, you got this 💜⭐