Hi folks,

Short: what do you recommend for documenting an external library's
pledge(2) requirements?

Longer: https://bsd.network/@florian/99802355448571943

The question raised in this... um... toot?... is which promises are
required by an external library call, in this case khttp_parse(3) in
kcgi.  Sure, we can always just run the program, look in
/var/log/messages for failure, and edit our promises.  But just... no.

In this particular case, I've documented this function's requirements
unofficially here and there---tutorials and such.  But it's not
canonical.  What I'd like is to put these directly into the manpages.

Something like:

.Sh SANDBOXING
On
.Ox ,
the
.Fn khttp_parse
function requires the
.Qq stdio proc
promises to
.Xr pledge 2 .

This encourages developers to use the tightest possible promises.  And
as mdoc(7) is meant not to be system-specific, this might also include
information on, say, .Fx's Capsicum, or maybe whatever Linux uses this
week.  It already has "SECURITY CONSIDERATIONS", but that just doesn't
seem quite right.

Thoughts?

Kristaps

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