sbin: 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/

swapoff(8): add -f flag

to force swapout by ignoring the heuristic that calculates amount of
allocated memory against total of RAM plus remaining swap.

Reviewed by: markj
Discussed with: alc
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D33165

The -F flag of swapon(8) requires -a to work.

Before this change, swapon(8) implied that -F works as a standalone option,
which is not the case and would produce a usage message. This change extends
the description of the -F option to mention that -a is required with it.

PR: 238551
Submitted by: Christian Baltini
MFC after: 5 days

swap_pager.c reserves 2 blocks for a bsd label. Change that 2 to the
expression howmany(BBSIZE, PAGE_SIZE), where BBSIZE is the size of the
boot block area. That can be less than 2 if PAGE_SIZE is big.

swapon(8) has an option to trim (delete) all the blocks of a device at
startup. However, if the first of those blocks is a bsd label, then
trimming those blocks is destructive. Change swapon to leave the
first BBSIZE bytes untrimmed.

Update manual pages to reflect changes in how swapon and how it may be
used, espeically in association with savecore.

Reviewed by: alc
Approved by: markj (mentor)
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D21191

Modify swapon(8) to invoke BIO_DELETE to trim swap devices, either if
'-E' appears on the swapon command line, or if "trimonce" appears as
an fstab option.

Discussed at: BSDCAN
Tested by: markj
Reviewed by: markj
Approved by: markj (mentor)
Differential Revision:https://reviews.freebsd.org/D20599

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

swapoff: Remove only late devices with -aL.

Currently, '/etc/rc.d/swaplate stop' removes all swap devices. This can be
very slow and may not even be possible if there is a lot of swap space in
use. However, removing swap devices is only needed for late swap devices
that may depend on daemons that subsequent shutdown steps stop. Normal swap
devices such as hard disk partitions will remain available throughout the
shutdown process and need not be removed.

In swapoff, interpret -aL to remove late swap devices only, and use this in
etc/rc.d/swaplate. The meaning of -aL in swapon remains unchanged (add all
swap devices, both normal and late).

PR: 187081
Reviewed by: wblock (man page only), ngie
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D8126

swapon(8): Update to reality: swapoff ignores -L and the late option in fstab.

MFC after: 1 week

- Purge one more reference to ad(4)[1].
- NSWAPDEV limit has gone.

Noticed by: Sergey V. Dyatko [1]
MFC after: 1 week

- Add vnode-backed swap space specification support. This is enabled when
device names "md" or "md[0-9]*" and a "file" option are specified in
/etc/fstab like this:

md none swap sw,file=/swap.bin 0 0

- Add GBDE/GELI encrypted swap space specification support, which
rc.d/encswap supported. The /etc/fstab lines are like the following:

/dev/ada1p1.bde none swap sw 0 0
/dev/ada1p2.eli none swap sw 0 0

.eli devices accepts aalgo, ealgo, keylen, and sectorsize as options.

swapctl(8) can understand an encrypted device in the command line
like this:

# swapctl -a /dev/ada2p1.bde

- "-L" flag is added to support "late" option to defer swapon until
rc.d/mountlate runs.

- rc.d script change:

rc.d/encswap -> removed
rc.d/addswap -> just display a warning message if $swapfile is defined
rc.d/swap1 -> renamed to rc.d/swap
rc.d/swaplate -> newly added to support "late" option

These changes alleviate a race condition between device creation/removal
and swapon/swapoff.

MFC after: 1 week
Reviewed by: wblock (manual page)

Add new option -F to specify alternative location of the /etc/fstab
file.

MFC after: 1 month

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.

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

Add a -q flag to swapon(8) to suppress informational messages. Use it in
rc.d.
Note: errors are not affected by this flag.

- Change the meaning of -h flag from giving the output in megabytes to
giving the output in a human-readable form. This behaviour is consistent
with most of system tools.
- Add -m and -g options to give output in megabytes and gigabytes
respectively.

Sync program's usage() with manpage's SYNOPSIS.

Sort sections.

Remove advertising clause from University of California Regent's license,
per letter dated July 22, 1999.

Approved by: core, imp

Spell "utilities" correctly.

More fixes.

Submitted by: Andy Farkas <andyf@speednet.com.au>
Reviewed by: das

mdoc(7) police: Tidy up.

Clarify about NSWAPDEV, add a DIAGNOSTICS section pointing to
swapon(2), and correct HISTORY.

Reviewed by: mike (mentor)

Add 'swapctl' - as a hardlink to swapon/swapoff, and augment swapon with
swapctl functionality. The idea is to create a swapctl command that is
fairly close to the OpenBSD and NetBSD version. FreeBSD does not implement
swap priority (and it would be a mistake if we did) so we didn't bother with
that part of it.

Submitted by: Eirik Nygaard <eirikn@bluezone.no>
Augmented by: dillon (extensively)
Reviewed by: David Schultz <dschultz@uclink.Berkeley.EDU>

This is David Schultz's swapoff code which I am finally able to commit.
This should be considered highly experimental for the moment.

Submitted by: David Schultz <dschultz@uclink.Berkeley.EDU>
MFC after: 3 weeks

s/filesystem/file system/g as discussed on -developers

The .Nm utility.

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

vnconfig(8) -> mdconfig(8).

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

correct wording in BUGS section; it's not possible to dismount swap
devices, but it's certainly possible to make use of them.

PR: 17013
Submitted by: Giorgos Keramidas <keramida@ceid.upatras.gr>

Mention /dev/vn0b and /dev/vntab. ascii -> ASCII transform had
already happened in an earlier commit.

PR: docs/13645
Submitted by: Stephen Roznowski <sjr@home.com>

Correct spelling : ascii -> ASCII

PR: docs/13702
Submitted by: Stephen J. Roznowski <sjr@home.com>
Reviewed by: mpp

$Id$ -> $FreeBSD$

Refer to current names for swap partitions in the `FILES' section.

PR: docs/11709
Submitted by: Matthew D. Fuller <fullermd@over-yonder.net>

.Nm swapon -> .Nm.
Sort #includes. Add rcsid.

Revert last commit and SEE ALSO pstat(8) instead.

Submitted by: Bruce Evans

SEE ALSO swapinfo(8).

PR: 5447
Submitted by: Craig Leres <leres@ee.lbl.gov>

.Xr vnconfig 8. This was suggested by Dworkin Muller <dworkin@village.org>
when he tried to figure out how to swap to a file and had to ask me for
help.

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.

add missing comma(s) in .Xr macros

Make the noauto flag usable for swap devices too. Closes PR#1542
Submitted-By: David Leonard <d@scry.dstc.edu.au>

fstab is in section 5, not section 8.
Obtained from: NetBSD

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