STRUCT COMEDI_FILE(9)

🌸 NAME 🌸

okay bestie, welcome to the struct comedi_file(9) page from the Kernel API Manual — it's all about struct comedi_file, which is per-file private data for a COMEDI device. 🫶✨

✨ SYNOPSIS ✨

here's the struct, copied exactly because we do not play with code, periodt:

       struct comedi_file {
           struct comedi_device *dev;
           struct comedi_subdevice *read_subdev;
           struct comedi_subdevice *write_subdev;
           unsigned int last_detach_count;
           unsigned int last_attached:1;
        };

🫶 Members 🫶

okay so member by member, no skips, no cap:

• dev — COMEDI device. literally the main character field. 💅
• read_subdev — current "read" subdevice. that's the read one rn. 🦋
• write_subdev — current "write" subdevice. and that's the write one rn. 🎀
• last_detach_count — last known detach count. keeping the receipts. 🧚
• last_attached — last known attached/detached state. iconic little status holder. ⭐

💅 SEE ALSO 💅

bestie, go peek at these too:

• Kernel file: ./drivers/comedi/comedi_fops.c
• comedi_dev_put(9)
• comedi_dev_get_from_minor(9)
• comedi_is_subdevice_running(9)
• comedi_get_is_subdevice_running(9)
• comedi_put_is_subdevice_running(9)
• comedi_set_spriv_auto_free(9)
• comedi_alloc_spriv(9)
• get_valid_routes(9)
• comedi_event(9)

mwah 💖 this lil page comes from ./drivers/comedi, dated October 2026, and it's all about struct comedi_file(9) — catch u later, bestie! 🎀💜