IBRSC(3)

✨ NAME ✨

ibrsc — bestie, this is the one that asks for system control on the board 👑

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🌸 SYNOPSIS 🌸

#include <gpib/ib.h>

int ibrsc(int ud, int request_control);

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💖 DESCRIPTION 💖

okay so listen. If request_control is nonzero, then the board that your board descriptor ud is pointing at gets promoted to system controller. main character promotion, honestly. 👑

And if request_control is zero? Then that board releases system control. stepping down, we love a graceful exit 💅

So what does a system controller even do, you ask? It's the one with the power to assert the REN and IFC lines — iconic behaviour, truly — and it's typically also the controller-in-charge. like, usually it holds both titles, but that's the vibe, not a rule 💖

Automatic assertion of REN is controlled with ibconfig(). So if the IbcSRE configuration option has been set for your board descriptor ud, then REN will automatically get asserted the moment the board becomes system controller. And guess what — IbcSRE is set by default. slay ✨

🚨 IMPORTANT bestie, no cap: a GPIB bus may not have more than one system controller. one. single. one. do not try it. there can only be one main character per bus 👑

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🫶 RETURN VALUE 🫶

The value of ibsta is returned. that's it, that's the tea 🍓

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🎀 COPYRIGHT 🎀

Copyright © 2003-2006, 2008 Frank Mori Hess

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and that's the whole page, bestie 💜 this was linux-gpib version 4.3.7, dated 07/06/2026 — go assert some lines responsibly, mwah 🧚✨