From: Kurt Miller <kurt@intricatesoftware.com>
Subject: Re: Truncate long thread names in setthrname(2)
To: tech@openbsd.org
Cc: Kurt Miller <kurt@intricatesoftware.com>
Date: Mon, 24 Nov 2025 00:41:05 +0000

On Nov 23, 2025, at 7:06 PM, Kurt Miller <kurt@intricatesoftware.com> wrote:
> 
> Instead of failing with EINVAL when setthrname(2) is passed a thread
> name longer then MAXCOMLEN, truncate the name to fit. This is likely
> what the user wants and saves them from having to snprintf(3) into a
> buffer sized MAXCOMLEN+1 first.
> 
> This makes pthread_set_name_np(3) succeed with long thread names
> instead of silently failing.

Forgot to mention: and also matches what FreeBSD does.