[ArchOversight]

There's the `setproctitle` in FreeBSD that is designed exactly for a process to update the information that is presented to tools such as ps.

https://man.freebsd.org/cgi/man.cgi?query=setproctitle&aprop...

[asveikau]

There's also getprogname(3) on a lot of systems, and the __progname variable. I seem to recall this is an area where various Unix like systems have slight variations.

[account42]

prctl(PR_SET_NAME) on Linux - sets the thread name, and the name of the main thread is shown as the process name in most tools.