misc/59192: setsid(2), setpgid(2): missing automatic tests

[campbell+netbsd%mumble.net@localhost]

>Number:         59192
>Category:       misc
>Synopsis:       setsid(2), setpgid(2): missing automatic tests
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    misc-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Mar 17 19:05:00 +0000 2025
>Originator:     Taylor R Campbell
>Release:        current, 10, 9, ...
>Organization:
The NetPGID Foundabug
>Environment:
>Description:
I accidentally broke setpgid(2) (and probably setsid(2)) while sprinkling dtrace SET_ERROR probes:

https://mail-index.netbsd.org/source-changes/2025/03/16/msg155972.html

However, this didn't cause any particular tests to fail, as far as I can tell.
>How-To-Repeat:
commit a change that breaks setpgid(2)
>Fix:
Yes, please!  Need some automatic tests of setsid(2) and setpgid(2).