ibcs-us

This replaces of https://sourceforge.net/projects/ibcs64/. It is the same thing implemented in user-space. iBCS64 is a fork of https://sourceforge.net/projects/linux-abi/ that ported it to amd64.

All available documentation can be read online at http://ibcs-us.sourceforge.net/

In summary: if you run "ibcs program args", where "program" is a statically linked binary (elf, coff, elf) that ran on Xenix, SCO SVR4, SVR4, wyse or similar operating system, there is a chance it will run under Linux.

If it doesn't run you can probably get it to run if you have a platform it does run on and know C. See the README.txt in the source for more information.

Features

Runs on any version of Linux that supports rt_sigaction, which is every verison from 2.2 onwards.
Runs on both amd64 and x86.
Doesn't use any library except those required by the compiler (-lgcc for gcc).
Has no run runtime dependencies whatsoever.
The emuation runs at native speed (it is as fast as the previous kernel implementation).
All options are controlled via the command line each time a program is run. There are no compile time options, nor are there any global options like kernel module settings that effect all programs.

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juanc Posted 2023-12-07

Excellent work, my congratulations
telmax21 Posted 2020-08-12

Life saver, means I no longer need to run old SCO binaries in a RHEL 5 VM with IBCS 3.8 kernel modules. Its working well on RHEL 7 for both Informix ESCL/C and 4GL coff.
eer Posted 2019-07-19

Bravo for resurrecting this. I'll be taking a look, and I appreciate your moving it into user space. I agree it should be easier to maintain, even if it involves handling traps.