IBEVENT(3)

💖 IBEVENT(3) — the ibevent era 💖

okay bestie, welcome to ibevent(3) aka the manual page where we grab events off the event queue of a board. this is the Traditional API Functions corner of the world, and honestly? it's giving vintage chic. let's get into it 🎀

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✨ NAME ✨

ibevent — get events from event queue (board)

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🌸 SYNOPSIS 🌸

#include <gpib/ib.h>

int ibevent(int ud, short *event);

like yes, that's the whole thing. short and slay. 💅

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🦋 DESCRIPTION 🦋

so ibevent() is literally how you obtain the oldest event stored in the event queue of the board that's specified by the board descriptor ud. oldest first, bestie, that's the rule. no cutting in line 🙈

the EVENT bit of ibsta is your lil signal that the event queue contains 1 or more events. real "you've got mail" energy ✉️

an event can be:

• a clear command
• a trigger command
• reception of an interface clear

and the type of event gets stored in the location specified by event, which may be set to any of these values 👇

📋 Table 8. events

• EventNone — value 0 → The board's event queue is empty
• EventDevTrg — value 1 → The board has received a trigger command from the controller-in-charge.
• EventDevClr — value 2 → The board has received a clear command from the controller-in-charge.
• EventIFC — value 3 → The board has received an interface clear from the system controller. Note, some models of GPIB interface board lack the ability to report interface clear events.

🚨 bestie heads up on that EventIFC one: some models of GPIB interface board straight up lack the ability to report interface clear events. so if you're not seeing them, it might not be you — it might be the board. iykyk 💀

now, the ✨lore✨ you actually need:

the event queue is disabled by default. it may be enabled by a call to ibconfig(). yes, you have to opt in. she's shy like that 🫶

each interface board has a single event queue, and that queue is shared across all processes and threads. so, only one process can retrieve any given event from the queue. no take-backs, no sharing, no double dipping — one event, one lucky winner 👑

also the queue is of finite size, so events may be lost (ibevent() will return an error) if it is neglected too long. so like… check your queue, bestie. don't leave her on read 😭

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⭐ RETURN VALUE ⭐

the value of ibsta is returned. that's it. that's the return. iconic.

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👑 COPYRIGHT 👑

Copyright © 2003-2006, 2008 Frank Mori Hess

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and that's the whole vibe check, babe 💖 this was linux-gpib 4.3.7, dated 07/06/2026 — thanks for scrolling all the way down with me, you're a real one 🌈✨🎀