IBERR(3)

💖 IBERR(3) 💖

okay bestie, so this is the iberr page from the Linux-GPIB Reference — yeah, that whole GPIB thing, the manual's sitting at section 3, iykyk. pull up a chair, we're talking about one (1) extremely important little int. 🫶

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✨ NAME ✨

iberr — she holds the error code. that's it. that's the whole job. and she does it flawlessly. 👑

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✨ SYNOPSIS ✨

#include <gpib/ib.h>

volatile int iberr;

okay look at her. volatile int. volatile. she can change at any moment behind your back and the compiler knows better than to assume otherwise. main character energy fr fr 💅

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✨ DESCRIPTION ✨

so here's the tea: iberr gets set whenever a function from the 'traditional' API or the 'multidevice' API fails with an error. like, the moment something goes wrong, she's updated. she is the receipt. 🧾✨

and the meaning of each possible value she can hold? that's all in the table below — every single one of them. no value left behind, bestie, we are not summarising. 👇

heads up: she only gets written when a call actually fails. no failure, no new value. don't go reading stale vibes. 😭

📋 Table 3. iberr error codes (the whole vibe check of what iberr can be screaming about)

ok bestie, here's the tea on every single one of these. memorise them, screenshot them, put them in your notes app. 💖

• EDVR (0) — a system call has failed. ibcnt/ibcntl will be set to the value of errno. like, the OS itself said no 😭
• ECIC (1) — your interface board needs to be controller-in-charge, but it is not. it simply is not giving CIC energy. 🙈
• ENOL (2) — you tried to write data or command bytes, but there are no listeners currently addressed right now. nobody's home, nobody's listening, it's giving empty group chat. 💀
• EADR (3) — the interface board failed to address itself properly before starting an io operation. it couldn't even find itself. relatable tbh. 🫠
• EARG (4) — one or more arguments to the function call were invalid. check ur arguments, babe. ✨
• ESAC (5) — the interface board needs to be system controller, but it is not. different role, different board, bestie. 👑
• EABO (6) — a read or write of data bytes has been aborted, possibly due to a timeout or reception of a device clear command. it got cancelled mid-sentence. 😩
• ENEB (7) — the GPIB interface board does not exist, its driver is not loaded, or it is not configured properly. like... where is she. three options and all of them are bad. 💀
• EDMA (8) — not used (DMA error), included for compatibility purposes. it's a legacy npc, no lines, purely vibes. 🎀
• EOIP (10) — the function call can not proceed due to an asynchronous IO operation (ibrda(), ibwrta(), or ibcmda()) in progress. one thing at a time, bestie, she's busy. ⏳
• ECAP (11) — incapable of executing the function call, due to the GPIB board lacking the capability, or the capability being disabled in software. the board said "not my skill set". 🚫
• EFSO (12) — file system error. ibcnt/ibcntl will be set to the value of errno. the files are fighting you. 🍓
• EBUS (14) — an attempt to write command bytes to the bus has timed out. the bus ghosted you. 👻
• ESTB (15) — one or more serial poll status bytes have been lost. this can occur due to too many status bytes accumulating (through automatic serial polling) without being read. read ur mail, bestie, the pile-up is real. 📬
• ESRQ (16) — the serial poll request service line is stuck on. this can occur if a physical device on the bus requests service, but its GPIB address has not been opened (via ibdev() for example) by any process. thus the automatic serial polling routines are unaware of the device's existence and will never serial poll it. it's screaming for attention and literally nobody knows it exists. 😭 the way that is so tragic fr fr.
• ECNF (17) — there is a syntax or value error in the configuration file. this error can be returned by ibfind() and ibdev(). check ur config, the typo is in there somewhere. 🔍
• ETAB (20) — this error can be
• 💅 Oh and bestie, the very last row of that table is a lil' mysterious — the description column just says it's returned by ibevent(), FindLstn(), or FindRQS(). Peep their descriptions for more information, they spill all the tea. 🫖✨

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ngl, if the idea of a global variable is giving you the ick — literally same, so valid — you do not have to use one. Instead you can hit up ThreadIberr(), which hands you back a thread-specific value. 🌈✨ No shared state, no chaos, just your own lil' iberr, and that's the vibe check passing. 👑

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💖 COPYRIGHT 💖

Copyright © 2003-2006, 2008 Frank Mori Hess

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And that's a mf wrap on IBERR(3)! 🎀 This page is part of linux-gpib 4.3.7 and it's dated 07/06/2026. Go forth and read your iberr like the main character you are — no cap, you got this fr fr. 💖🌸🦋