tail.1: Add an example for +n 1

MFC after: 3 days
Sponsored by: Klara, Inc.

tail.1: Lint with mandoc(1)

MFC after: 3 days
Sponsored by: Klara, Inc.

usr.bin: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by: Netflix

Remove $FreeBSD$: one-line nroff pattern

Remove /^\.\\"\s*\$FreeBSD\$$\n/

Improve usability of head(1) and tail(1):

- Consistently support -q (quiet) and -v (verbose)
- Allow specifying numbers with SI prefixes supported by expand_number(3)
- Remove 2^31 limit on lines for head(1)

MFC after: 2 weeks
Reviewed by: lwhsu, pauamma, gbe
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D35720

Use -F instead of -f in tail(1) examples

There is an example in tail(1) manual page explaining how to use tail(1) to
track the contents of /var/log/messages. The example uses the -f flag to
follow the file. The problem with the -f flag is that it cannot handle the
situation where /var/log/messages is rotated. Hence, use -F instead in the
example.

Reviewed by: asomers
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D24157

tail(1): Address mandoc concern (space before punctuation after macro)

X-MFC-With: r332372

tail(1): Add some long options

Add --blocks, --bytes, and --lines long options for -b, -c, and -n
respectively. This improves tail(1)'s compatibility with its GNU counterpart
in a straightforward way.

Reviewed by: eadler (earlier version)
MFC after: 3 days

Renumber copyright clause 4

Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by: Jan Schaumann <jschauma@stevens.edu>
Pull Request: https://github.com/freebsd/freebsd/pull/96

Remove EOL whitespace accidentally introduced in r248393.

Add a couple of examples.

Obtained from: OpenBSD

Remove the advertising clause from UCB copyrighted files in usr.bin. This
is in accordance with the information provided at
ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change

Also add $FreeBSD$ to a few files to keep svn happy.

Discussed with: imp, rwatson

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

Create the altix project branch. The altix project will add support
for the SGI Altix 350 to FreeBSD/ia64. The hardware used for porting
is a two-module system, consisting of a base compute module and a
CPU expansion module. SGI's NUMAFlex architecture can be an excellent
platform to test CPU affinity and NUMA-aware features in FreeBSD.

Use our canonical .Dd format.

Submitted by: Ulrich Spoerlein

Change the behaviour of -F slightly; it now persists (forever) in
trying to open files rather than giving up when it encounters an
error. ENOENT errors are not reported.

As a result, files that are moved away then recreated are not at
risk of being 'lost' to tail. Files that are recreated and
temporarily have unreadable permissions will be shown when they
are fixed.

This behaviour is consistent with the GNU version of tail but
without the verbiage that goes with the GNU version.

This change also fixes error messages accompanying -f and -F.
They no longer report problems with (null)!

MFC after: 3 weeks

- Import the HEAD csup code which is the basis for the cvsmode work.

Markup revision.

- Simplify the formatting in the SYNOPSIS.
- Add the forgotten new option in usage().

Add a -q option to suppress header lines when multiple files are specified.

Approved by: cperciva (mentor)
MFC after: 1 week

Added the EXIT STATUS section where appropriate.

Mechanically kill hard sentence breaks.

Note that this appeared at least as early as PWB UNIX.

Use the literal string 'PWB UNIX', as we still have no .At macro for it.

mdoc(7) police: utilize the new .Ex macro.

mdoc(7) police: removed HISTORY info from the .Os call.

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

Add DIAGNOSTICS section name

$Id$ -> $FreeBSD$

Add $Id$, to make it simpler for members of the translation teams to
track.

The $Id$ line is normally at the bottom of the main comment block in the
man page, separated from the rest of the manpage by an empty comment,
like so;

.\" $Id$
.\"

If the immediately preceding comment is a @(#) format ID marker than the
the $Id$ will line up underneath it with no intervening blank lines.
Otherwise, an additional blank line is inserted.

Approved by: bde

Add a new -F flag which is a superset of -f. It will cause tail to
stat() the file being followed and do a close/reopen if the file has been
renamed and/or rotated. This is damn useful for leaving running on files
in /var/log when newsyslog(8) rotates them.

Remove trailing \n in warn() string.

BSD 4.4 Lite Usr.bin Sources