frr

As far as the formatting part is concerned, if you just want to look at an implementation, FreeBSD's is extremely nice and readable: https://github.com/lattera/freebsd/blob/master/lib/libc/stdi... For FRRouting, we decided we want to use Linux kernel style extensions (like "%pI4"), so to get this in a portable way we imported FreeBSD's printf into our code. Since printf() isn't exactly "hot" code getting changed a lot, we considered the maintenance / duplication cost acceptable. You can see the result here: https://github.com/FRRouting/frr/tree/master/lib/printf http://docs.frrouting.org/projects/dev-guide/en/latest/loggi... stdio support is completely gone in our copy, WCHAR_SUPPORT is disabled at compile time, locale support is stubbed out/hardcoded to C locale. None of these matter to us. As a result, we can use this printf even in

This article uses Quagga - they really should be using FRRouting, which was forked from Quagga in 2017 by the core Quagga developers and has 4 times as many commits (16000[0] vs 4000[1]), far more features, bugfixes, etc. Quagga has been dead for over a year. [0] https://github.com/FRRouting/frr [1] http://gogs.quagga.net/Quagga

I posted this in a separate comment, but if you're still using Quagga it is mostly dead - its fork FRR[0] is miles ahead. [0] https://github.com/frrouting/frr

If you're into free routing software, also for *BSD, Linux and Solaris: https://github.com/frrouting/frr