Add basic tests for chio(1), cp(1), domainname(1), rm(1) and sync(8)

[shivansh]

Summary

Add basic command line parsing test coverage for these utilities. The tests
were automatically generated based on their man pages. These tests can be
expanded by hand for more thorough coverage. The aim is to generate very
basic amount of test coverage for all the utilities in the base system.

Tests generated via: https://github.com/shivansh/smoketestsuite/

[asomers]

bin/chio/tests/chio_test.sh

4

Please add an SPDX license identifier to all new files. This is a new way to describe software licensing, recently introduced by the project. In this case, it should look like this

* SPDX-License-Identifier: BSD-2-Clause-FreeBSD

bin/sync/tests/sync_test.sh

34

In what sense is this a failure? It's normal to use sync without any arguments.

[shivansh]

Address changes requested by @asomers

[asomers]

bin/chio/Makefile

6

missing .include <src.opts.mk> here and in the other bin/*/Makefile files

[shivansh]

Address changes requested by @asomers.

I think it's about time that I start trying to figure out how FreeBSD makefiles work to avoid such mistakes in the future. And I guess it's going to be a quite daring task, given [1] says - "and if you do look at them, make sure you have a flask of strong coffee handy!" :P

[1]: https://www.freebsd.org/doc/en/books/developers-handbook/tools-make.html

[asomers]

bin/domainname/tests/domainname_test.sh

40

This isn't necessarily the case. Systems that happen to be using NIS will return a nonempty string here and fail the test. The only thing that you can safely assert here is the exit:0 part.