Re: [PATCH] wait.2: Add ESRCH for when pid == INT_MIN

* Richard Palethorpe [off-list ref], 2021-07-08, 11:08:

Please see upstream commit:

commit dd83c161fbcc5d8be637ab159c0de015cbff5ba4
Author: zhongjiang [off-list ref]
Date:   Mon Jul 10 15:53:01 2017 -0700

    kernel/exit.c: avoid undefined behaviour when calling wait4()

It avoids negating INT_MIN by returning early with ESRCH.

That sounds like a bug in the kernel, though?

POSIX says the error should be ECHILD if "the process group specified by pid does not exist".

-- 
Jakub Wilk