The knfmt(1) utility formats source code files according to style(9) from OpenBSD. By default, source code is read from standard input and the formatted source code is written to standard output:
$ knfmt <knfmt.c
It can perform an in place edit by writing back the formatted source code:
$ knfmt -i knfmt.c
It can produce a diff between the original and formatted source code:
$ knfmt -d knfmt.c
The implementation is further described in DESIGN.
The installation prefix defaults to /usr/local and can be altered using the
PREFIX environment variable when invoking configure:
$ ./configure
$ make install
Copyright (c) 2021 Anton Lindqvist. Distributed under the ISC license.