SID(8)

🌸 SID(8) — System Manager's Manual 🌸

okay bestie, sit down, hydrate, and let me tell you about sid — the Storage Instantiation Daemon. yes it's section 8 of the System Manager's Manual, yes it's a daemon, yes it's lowkey iconic. 💅

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✨ NAME ✨

sid — Storage Instantiation Daemon

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🦋 SYNOPSIS 🦋

sid [-f] [-h] [-v] [-V]

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💖 DESCRIPTION 💖

so. Storage Instantiation Daemon (SID) is here to help with Linux storage device state tracking — and when I say tracking I mean the whole vibe: device layers, groups, whole entire stacks, all of it. it does this by monitoring the progression of events. and then, based on the states it monitored plus info it recorded along the way, it can trigger associated actions for well-defined triggers — including activation and deactivation of devices and their layers up in the stack. main character energy fr. 👑

SID positions itself on top of udev, reacting to udev uevents. it's closely interlinked and cooperating with the udev daemon, they're literally besties. there's a specialized helper command, usid, that gets executed in udev rules to communicate with the SID daemon, which then triggers further processing. the way that the pipeline just works? obsessed. ✨

at its core, SID provides an infrastructure and an API so that various device subsystems can create modules that handle specific device types and their abstractions. for that purpose, it organizes overall uevent processing into discrete and controlled steps, and through an API it gives access to its own SID database — for use within core parts as well as modules — so they can store and retrieve extended information beyond what udev daemon's database can do. glow up. 💖

the SID database contains both internal and general-purpose records, bestie, two whole flavors:

• internal records — accessed only through dedicated API calls, and those calls are used to track and support device dependencies, grouping, triggers and associated actions.
• general-purpose records — modules can store and retrieve these directly, with the option to define their key components, their scope of visibility, and their access type.

and because SID keeps track of the overall storage device stack and grouping, it gives you an insight into the stack, the device and group dependencies, and it can notify you when there are changes to certain parts of the device stack. and when that happens? there needs to be an appropriate action executed — either inside SID (using SID's triggers and associated actions) or outside SID itself (using extended notifications that SID sends out). no cap. 🫶

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🎀 OPTIONS 🎀

• -f, --foreground — Run in foreground.
• -h, --help — Display the help text.
• -j, --journal — Log to the journal.
• -v, --verbose — Run in verbose mode. Repeat up to 4 times to increase the level of detail of log messages.
• -V, --version — Display version, configuration and compilation information.

not me noticing the synopsis only shows -f, -h, -v and -V while -j/--journal is chilling down here in OPTIONS — yeah, that's exactly what the page says, i'm just reporting the lore, don't come for me 🙈

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🌈 SEE ALSO 🌈

• udev(7)
• systemd-udevd(8)

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and that's the whole page, bestie — you ate that. 💅✨

sign-off time: this one's brought to you by Red Hat, Inc., and it's the Storage Instantiation Daemon version 0.0.7. slay, go read your udev rules, iykyk. 🎀🦋💖