[ckuehl]

Yup, tini is really really similar and looks pretty cool! They're solving much of the same problem. It's unfortunate that we didn't find tini before we went and wrote dumb-init.

There are some minor differences (dumb-init looks like it's probably a bit better for interactive commands since it e.g. handles SIGTSTP). You can also get process group behavior at run-time with dumb-init rather than compile time, and it's on by default unlike tini (as far as I can tell from a brief reading). But for most cases it won't make a difference.

[krallin]

Quick disclaimer: I'm the author of Tini (thanks for the hat tip, by the way!).

Note that for interactive usage, Tini actually hands over the tty (if there is one) to the child, so in that case signals that come "from the TTY" (though in a Docker environment this is an over-simplication) actually bypass Tini and are sent to the child directly. This should include SIGSTP, though I'm not sure I tested this specifically.

That being said, both tools are probably indeed very similar — after all there is little flexibility in that kind of tool! Process group behavior is probably indeed where they differ the most. : )