User Profile handling in ancient release(s)

Hello,

lately I was following the blog of Cris Hird to learn about "daemon programming". He provides a great example with a main task (testsvr) spawning a worker task (worker) on request.

https://www.shieldadvanced.com/Blog/ibm-i/lets-c-integration-with-security/

For switching the user profile on the fly, he uses functions from qsyphandle.h. These functions aren't available on OS/400 V4R5.

POSIX setuid() doesn't work, because the function isn't referenced in sys/types.h, nor in unistd.h (as it's in Linux).

Does anybody remember how user switching was done two decades ago in OS/400?

:wq! PoC

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