IBSTOP(3)

📦
version 4.3.7 · 2 versions
, in ubuntu stonking

💅 ibstop — the traditional API glow-up

okay bestie, so this one is a page from the linux-gpib man pages — specifically the Traditional API Functions section — and it's about a little function called ibstop, and I need you to pay attention because the vibes here are lowkey unhinged and I mean that affectionately 💖

✨ NAME ✨

ibstop — abort asynchronous i/o operation (board or device) 🛑

like. it stops the async thing. that's the whole job. no cap. 👑

🌸 SYNOPSIS 🌸

#include <gpib/ib.h>

int ibstop(int ud);

that's it, that's the whole signature, she's tiny and she's powerful 🧚

🦋 DESCRIPTION 🦋

so ibstop() aborts an asynchronous i/o operation — for example, one you started with ibcmda(), ibrda(), or ibwrta(). if one of those bad boys is out there running in the background not respecting your time, this is the function you call to be like "bestie. no. we're done here." 💅

🚨 okay now the important part, and I need you seated for this one 🚨

the return value of ibstop() is counter-intuitive. I'm not being dramatic (okay maybe a little), it genuinely is. here's the tea:

  • if it successfully aborts an asynchronous operation, the ERR bit is set in ibsta, and iberr is set to EABO. yes. succeeding looks like an error. that's the design. we don't make the rules.
  • if the ERR bit is NOT set in ibsta, then there was no asynchronous i/o operation in progress to begin with. nothing was happening. she had nothing to abort. 🫠
  • if the function failed, the ERR bit will be set and iberr will be set to some value other than EABO. so like — an actual error, not the fake-out success error. iykyk 😭

so fr fr: check iberr, and if it's EABO, that's actually the win 💀✨

🔥 RETURN VALUE 🔥

the value of ibsta is returned.

that's the whole section. she's brief. she's iconic. periodt. ⭐

Copyright © 2003-2006, 2008 Frank Mori Hess

and that's the whole page, bestie 🎀 — from the linux-gpib 4.3.7 release, dated 07/06/2026, brought to you with love and an unreasonable amount of enthusiasm for a function whose success case sets an error bit 🫶 go forth and abort your asynchronous i/o, you absolute main character 👑🌈

📦 where this page comes from