strnvis originates on OpenBSD. When NetBSD added it to their libc
they decided to swap the argument. Without starting a holy war on
the "best" argument order, adding an implementation of a function
that's widely available and making its signature purposefully
incompatible is beyond justification. FreeBSD (and so macos too?)
followed NetBSD in this, so we end up with *two* major and incompatible
strnvis implementations. libbsd is in a limbo, they started with
the OpenBSD version but they'll probably switch to the NetBSD version
in the future.
That's why we can't have nice things.
Do the right thing(tm) and check for the presence of the original
strnvis(3), if not available or broken use the bundled one.
it reached a point where this stuff is not maintenable. I'd like
to move forward with gmid, but the restriction of capsicum and the
linux environment at large that make landlock unusable (how can you
resolve DNS portably when under landlock?) -and don't get me started
on seccomp- makes it impossible for me to do any work.
So, I prefer removing the crap, resuming working on gmid by cleaning
stuff and consolidating the features, improving various things
etc... and then eventually see how to introduce some sandboxing
again on other systems. Patches to resume sandboxing are, as always,
welcome!
First move towards landlock support (#3). The shim is needed until
libc provides the proper wrappers for the landlock APIs; I hope it
doesn't take too long, but landlock was merged back in May and are
still missing.
This adds a check for setproctitle and for the (linux) prctl
PR_SET_NAME. If setproctitle is not available, on linux we provide an
implementation that use prctl (taken from tmux compat layer.)