wdtpci_set_heartbeat(9)

📦 version 7.3.1, in nixpkgs unstable

💖 wdtpci_set_heartbeat — like, the Kernel API Manual girlies know 💖

okay so bestie, welcome to the wdtpci_set_heartbeat(9) page from the Kernel API Manual ✨ section 9, kernel-space, very demure, very mindful 🎀 this is the one that sets your watchdog's heartbeat, and honestly? she's iconic for it 💅

✨ NAME ✨

wdtpci_set_heartbeat — literally the function that sets the heartbeat, that's it, that's the name 🫶 ngl the original NAME line has no description after the dash, so we're keeping it mysterious. main character energy 💀

🦋 SYNOPSIS 🦋

int wdtpci_set_heartbeat (int t );

yes queen, that's the whole signature, copied exactly, spaces and all, no cap 💯

🌸 ARGUMENTS 🌸

  • t — the new heartbeat value that needs to be set. like, this is the number you're sliding in there 💖 that's the whole argument, she's a single-int kind of girl ✨

👑 DESCRIPTION 👑

okay so here's the tea 🍓 — this bad boy sets a new heartbeat value for the watchdog device. that's the whole job. she wakes up, she sets the heartbeat, she goes home 🎀

but listen, because this part matters 🔥 if the heartbeat value is incorrect, we keep the old value and return -EINVAL 😭 no silent chaos, no vibes-based overwriting, the old value stays right where it is, periodt 💅

and if it's successful? we return 0 ✨ slay. that's the happy path. that's the win. we love a clean 0 🫶

bestie pls note: "incorrect value" means -EINVAL and your old heartbeat is untouched — the function does not just do whatever, iykyk 🙈

🌈 SEE ALSO 🌈

the kernel file is ./drivers/watchdog/wdt_pci.c — that's the source, that's the mothership, go visit her 💜 and while you're in ./drivers/watchdog, say hi to the whole friend group 👯‍♀️✨:

like, the whole wdtpci_* squad is here and they all ate 🔥 go read them too, fr fr 📚

mwah 💋 this page lives in ./drivers/watchdog, dated October 2026, under the Kernel API Manual banner — ty for coming to my ted talk, now go set some heartbeats bestie 🧚‍♀️💖

📦 where this page comes from