MFC r323275, r324112

r323275:
Add basic tests for chflags, mkdir, rcp, and rmdir

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.

Submitted by: shivansh
Reviewed by: asomers, brooks
Sponsored by: Google, Inc (GSoC 2017)
Differential Revision: https://reviews.freebsd.org/D12036

r324112:
Fix Makefile entries from r323275

Reported by: Vladimir Zakharov <zakharov.vv@gmail.com>
Reviewed by: ngie
X-MFC-With: 323275

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Add a few examples.

Obtained from: OpenBSD

Fix markup.

The new name for the DIAGNOSTICS section is EXIT STATUS.

Noticed by: ru

Move information about exit status into a DIAGNOSTICS section.

Remove useless errno.h include.

Approved by: grehan (mentor)
Obtained from: DragonFlyBSD

/*- or .\"- or #- to begin license clauses.

Do not emit a spurious warning when "directory" argument
to "rmdir -p" is absolute, with one or more leading slash.

Fixed "rmdir -p" that got broken by rev. 1.15.
(This also fixes "rmdir -v /nonexistent".)

Added -v to usage().

Remove clause 3 from the UCB licenses.

OK'ed by: imp, core

Add a -v (verbose) option.

Quiet warnings about copyright[].

Consistently use FBSDID

o __P has been reoved
o Old-style K&R declarations have been converted to new C89 style
o register has been removed
o prototype for main() has been removed (gcc3 makes it an error)
o int main(int argc, char *argv[]) is the preferred main definition.
o Attempt to not break style(9) conformance for declarations more than
they already are.

Default to WARNS=2. Binary builds that cannot handle this must explicitly
set WARNS=0.

Reviewed by: mike

WARNS= -> WARNS?=

Submitted by: Mike Barcroft <mike@q9media.com>

Silence WARNS=2 and BDECFLAGS on alpha and i386

MFC after: 1 week

mdoc(7) police: use the new features of the Nm macro.

Fix the rmdir -p a/b/c/ case, where rmdir -p a/b/c works, and rmdir c/
works.

PR: PR 6521
Submitted by: Rudolf Cejka <xcejka00@dcse.fee.vutbr.cz>
Reviewed by: eivind (in brief retrograde)

$Id$ -> $FreeBSD$

Correct use of .Nm. Add rcsid.

Don't strip trailing slashes (for the initial rmdir). It breaks
following of the symlink for `rmdir symlink/' and is unnecessary
for ordinary directories (POSIX doesn't require rmdir(1) to do
anything for trailing slashes; it requires rmdir(2) to let them
"refer to a directory", and following the symlink for symlink/ is
what BSD does). This also fixes bugs in the slash-stripping code
(for paths consisting entirely of slashes, the pointer into the
string was decremented to "before" the beginning of the string,
and the path was at best stripped to "".

The behaviour is unchanged except for the final directory for
`rmdir -p ...'. There is no alternative to stripping intermediate
slashes since they must be specified. The sloppy slash-stripping
code is adequate for intermediate directories, since the all-slashes
case fails early.

compare return value from getopt against -1 rather than EOF, per the final
posix standard on the topic.

Revert $FreeBSD$ to $Id$

Make the long-awaited change from $Id$ to $FreeBSD$

This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.

-Wall cleaning and implement -p commandline option.

-p mod obtained from: NetBSD

[HISTORY] command appeared in Version 1 AT&T UNIX
Obtained from: A Quarter Century of UNIX, Peter H. Salus, page 41

Added $Id$

This commit was generated by cvs2svn to compensate for changes in r1556,
which included commits to RCS files with non-trunk default branches.