Re: Faking a TTY on a pipe/socketpair

Lawrence D'Oliveiro <ldo@nz.invalid> writes:

On Tue, 10 Dec 2024 09:23:13 -0000 (UTC), Muttley wrote:
>

But the core part should really just be limited to starting the
machine and getting enough things running for a user to log on (or
if its a black box to do its task).

>
One thing lacking from sysvinit is, while it can start a service, it
cannot ensure the service was started properly, and it cannot perform
reliable service shutdown. So the job of service management was really
only half-done.

sysvinit has no concept of 'service.'

"Service started properly" is a pointless historical property because
"service was running propery 1ms" ago doesn't mean "service is still
running properly now" (that's one of the classic TOCTOU races everybody
just loves to ignore).

It's unclear what "reliable service shutdown" is supposed to mean. It's
possible to stop a somehow monitored process (not service) reliably (or
sort-of reliably) by killing it if it didn't terminate on its own
within some amount of time after a SIGTERM was sent to it. This works
perfectly with a special-purpose tool for that and doesn't need any
giant wolpertingers implemented with hundredthousands of lines of
overcomplicated C code.