Notably, the POSIX Threads API itself (i.e. pthread_ routines) returns errors di... | Hacker News

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		wahern 9 months ago \| parent \| context \| favorite \| on: What is going on in Unix with errno's limited natu... Notably, the POSIX Threads API itself (i.e. pthread_ routines) returns errors directly rather than through errno.

JdeBP 9 months ago [–]

It was a common design of new operating system APIs, not encumbered by PDP-11 compatibility, in the 1980s.

* https://tty0.social/@JdeBP/114816928464571239

Even some of the later augmentations in MS/PC/DR-DOS did things like return an error code in AX and the result in (say) CX instead of using AX and CF.

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