MFC r326276:

various: general adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

No functional change intended.

MFC r314987-r314989, r314993-r314994, r315046-r315049, r315102

r314987:
Use nitems() from sys/param.h.

Reviewed by: asomers
MFC after: 3 weeks.
Differential Revision: https://reviews.freebsd.org/D9944

r314988:
Use nitems() from sys/param.h.

Reviewed by: ume
MFC after: 3 weeks.
Differential Revision: https://reviews.freebsd.org/D9938

r314989:
Use nitems() from sys/param.h and also remove the cast.

Reviewed by: markj
MFC after: 3 weeks.
Differential Revision: https://reviews.freebsd.org/D9937

r314993:
Use nitems() from sys/param.h.

Reviewed by: ngie
MFC after: 3 weeks.
Differential Revision: https://reviews.freebsd.org/D9936

r314994:
Use nitems() from sys/param.h.

Reviewed by: ngie
MFC after: 3 weeks.
Differential Revision: https://reviews.freebsd.org/D9940

r315046:
Use nitems() from sys/param.h

Reviewed by: jhb
MFC after: 3 weeks.
Differential Revision: https://reviews.freebsd.org/D9941

r315047:
Use nitems() from sys/param.h.

Reviewed by: np
MFC after: 3 weeks.
Differential Revision: https://reviews.freebsd.org/D9945

r315048:
Use nitems() from sys/param.h.

MFC after: 3 weeks.

r315049:
Bring back the cast removed in my previous commit to allow us build vmstat
with WARNS 2. This cast was first introduced at r87690.

Reported by: bde, pfg and ngie
MFC after: 3 weeks.

r315102:
Use nitems() from sys/param.h.

Reviewed by: ngie
Differential Revision: https://reviews.freebsd.org/D9943

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

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

Adjust previous fix to conform to the existing style in this file.

Fix the precious change to check the pointer returned by malloc().

Submitted by: luke <luke.tw@gmail.com>
Pointy hat to: jhb

Exit cleanly if malloc() fails to allocate a buffer for a copy of the
current MBR.

PR: 205322
Submitted by: Alexander Kuleshov <kuleshovmail@gmail.com>
MFC after: 1 week

It's 2015, and some people are still trying to use fdisk and then
go asking what debug flags to set for GEOM to make it work. Advice
them to use gpart(8) instead.

Something similar should probably done with disklabel,
but I need to rewrite the disklabel examples first.

Reviewed by: wblock@
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3315

Add META_MODE support.

Off by default, build behaves normally.
WITH_META_MODE we get auto objdir creation, the ability to
start build from anywhere in the tree.

Still need to add real targets under targets/ to build packages.

Differential Revision: D2796
Reviewed by: brooks imp

Convert usr.sbin to LIBADD
Reduce overlinking

use .Mt to mark up email addresses consistently (part2)

PR: 191174
Submitted by: Franco Fichtner <franco@lastsummer.de>

Sweep man pages replacing ad -> ada.

Approved by: re (blackend)
MFC after: 1 week
X-MFC note: stable/9 only

Remove superfluous paragraph macro.

Be as explicit as possible when describing relation between the -m mask
argument and slices. Adjust example for the same reason.

Submitted by: Valentin Nechayev <netch netch kiev ua>
MFC after: 3 days

Allow boot0cfg to force a PXE boot via boot0 on the next boot.
- Fix boot0 to check for PXE when using the pre-set setting for the
preferred slice.
- Update boot0cfg to use slice 6 to select PXE. Accept a 'pxe' argument
instead of a number for the 's' option as a way to select PXE as well.

Submitted by: Andrew Boyer aboyer averesystems
MFC after: 2 weeks

Use NO_WCAST_ALIGN for usr.sbin/boot0cfg; because this is only built for
x86, any alignment warnings can be safely ignored.

MFC after: 1 week

Plug fd leaks

Remove a note about disabling of GEOM protection mechanism.
boot0cfg should work without such hack.

MFC after: 3 days

Reorganize write_mbr() function to be able write bootcode with different
ways. Improve error reporting and also fix indenting.
Now we are trying to write bootcode:
1. Directly to provider (if we can open it for writing);
2. Via GEOM_PART (if it is available);
3. Via GEOM_MBR.

MFC after: 2 weeks

Add reference to gpart(8).

MFC after: 3 days

Mark global functions and/or variables in boot0cfg(8) static where possible.

This allows compilers and static analyzers to do more thorough analysis.

Fix argument name. This fixes EINVAL when boot0cfg uses GEOM_PART'
control interface.

MFC after: 3 days

Revert r209469: it causes the rest of the function to be bypassed.

Reported by: ae

If a device can't be opened, don't keep going but display the error
returned from open() and quit.

PR: bin/81035
Submitted by: Peter Schuller <peter.schuller at infidyne.com>
Approved by: rrs (mentor)

Fixed static linkage.

The last big commit: let usr.sbin/ use WARNS=6 by default.

Write the MBR by using the bootcode verb of the gpart class.
The "write MBR" verb is kept for backward compatibility, but
the DIOCSMBR ioctl has been removed.

Extend the geom-related info and put in the NOTE section, not
in BUGS, as this is a feature.

Bump the date, as it was forgotten in previous commits and the
page has had significant changes recently

Another, hopefully final set of changes to boot0 and boot0cfg.

boot0.S changes:

+ import a patch from Christoph Mallon to rearrange the various
print functions and save another couple of bytes;

+ implement the suggestion in PR 70531 to enable booting from
any valid partition because even the extended partitions that
were previously in our kill list may contain a valid boot loader.
This simplifies the code and saves some bytes;

+ followwing up PR 127764, implement conditional code to preserve
the 'Volume ID' which might be used by other OS (NT, XP, Vista)
and is located at offset 0x1b8. This requires a relocation of the
parameter block within the boot sector -- there is no other
possible workaround.
To address this, boot0cfg has been updated to handle both
versions of the boot code;

+ slightly rearrange the strings printed in the menus to make
the code buildable with all options. Given the tight memory
budget, this means that with certain options we need to
shrink or remove certain labels.

and especially:

make -DVOLUME_LABEL -DPXE the default options.

This means that the newly built boot0 block will preserve the
Volume ID, and has the (hidden) option F6 to boot from INT18/PXE.
I think the extra functionality is well worth the change.

The most visible difference here is that the 'Default: ' string
now becomes 'Boot: ' (it can be reverted to the old value
but then we need to nuke 1/2 partition name or entries to
make up for the extra room).

boot0cfg changes:

+ modify the code to recognise the new boot0 structure (with the
relocated options block to make room for the Volume id).

+ add two options, '-i xxxx-xxxx' to set the volume ID, -e c
to modify the character printed in case of bad input

PR: 127764 70531
Submitted by: Christoph Mallon (portions)
MFC after: 4 weeks

- Improve error message given on g_providername call failure.
- While there, make error messages consistent with the rest.

Approved by: kib (mentor)

- Make use of the new and g_device_path utility function in libgeom to avoid
duplication of code in fdisk and boot0cfg. Also make use of g_providername to
fix an issue with fdisk and boot0cfg not using the correct provider when
writing the MBR.

Reviewed by: phk
Approved by: pjd (mentor)

"-b /boot/mbr" is redundant, /boot/mbr is the default boot code for fdisk(8).

Pointed out by: ru

- Revert previous revision, it was incorrect
- Add an example using fdisk instead

Pointed out by: ru
Submitted by: Warren Block <wblock@wonkity.com>
MFC after: 3 days

Document /boot/mbr (non-interactive boot block)

PR: doc/111840
Submitted by: Warren Block <wblock@wonkity.com>
MFC after: 1 week

Attempt gctl verb "write MBR" when updating.

This should solve the problem of modifying the MBR while running.

Document how to make boot0cfg work on mounted disks.

Sort sections.

Added the EXIT STATUS section where appropriate.

Open device R/W for ioctl modifications.

Correct polarity of packet mode bit.

Problem discovered when 'boot0cfg -B -v -o packet -s 2 ad4' turned off
packet mode while reporting it as being enabled.

boot0 defaults to packet mode.

Enable packet mode by default. Disk drives have gotten so large now,
it is often the case the partition one wants to boot is above cylinder 1023.

mdoc(7) fixes.

Document boot0sio and note that it requires modem handshake to work.

Spelling nit.

Remove spurious semicolons. Outside of functions they are actually errors but
GCC doesn't warn about them without -pedantic.

Approved by: das (mentor)
PR: 56649
Reviewed by: md5

Get rid of duplicates.

Use __FBSDID over rcsid[]. Protect copyright[] where needed.

Add an example of how to use the -m option that clarifies how the bits in
the mask correspond to slice numbers. Also, clarify the description of the
existing example.

Requested by: Larry Rosenman <ler@lerctr.org>

style.Makefile(5)

Use the new sector0 munging ioctls to make boot0cfg work under GEOM.

Split MBR and PC98 on-disk sliceformats out from disklabel.h, step 1:

Peter had repocopied sys/disklabel.h to sys/diskpc98.h and sys/diskmbr.h.

These two new copies are still intact copies of disklabel.h and
therefore protected by #ifndef _SYS_DISKLABEL_H_ so #including them
in programs which already include <sys.disklabel.h> is currently a
no-op.

This commit adds a number of such #includes.

Once I have verified that I have fixed all the places which need fixing,
I will commit the updated versions of the three #include files.

Sponsored by: DARPA & NAI Labs.

The .Nm utility

Remove references to the update/noupdate flag from the description
and examples of the "-s" option, since these two features operate
completely independently of each other.

Reviewed by: obrien

The man page is VERY WRONG about using "-o noupdate" with -s.
So fix it, and add an example using -s.

Trivial language fixes.

PR: 38015
Submitted by: Chris Pepper <pepper@mail.rockefeller.edu>

WARNS=2 cleanup.

Submitted by: Maxime Henrion <mux@qualys.com>
MFC after: 2 weeks

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

mdoc(7) police: s/BSD/.Bx/ where appropriate.

Unset MAINTAINER.

fdisk(8): document the default for -b, add xref to boot0cfg(8).
boot0cfg(8): add FILES section.

Reviewed by: rnordier

- Backout botched attempt to introduce MANSECT feature.
- MAN[1-9] -> MAN.

Add missing specification of the `-s' option to the usage line.

PR: bin/26004
Submitted by: ushida@msa.biglobe.ne.jp
Reviewed by: rnordier

Set the default manual section for usr.sbin/ to 8.

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

remove trailing periods from SEE ALSO.

Use Fx macro wherever possible.

Reflect new packet option default.

Set MAINTAINER.

Mark a path up with Pa.

Whitespace-only change: apply normal line breaking style.

Provide correct information regarding "packet" option default.

PR: 20936
Originated by: obrien

Allow people to set the default boot slice with boot0cfg.

PR: 18923
Submitted by: Ian Dowse <iedowse@maths.tcd.ie>
Reviewed by: jhb
Approved by: rnordier

- When we save the existing MBR to a file, check to see if the MBR we are
saving is boot0. If it is, use its version number so that we can grab
all of boot0 (1024 bytes with version 1.1 for example) when we save it
to a file via the 'f' option. Otherwise, we just save the first sector.
- Cleanup this code a bit by splitting some functionality out into separate
functions.

Suggested by: Patrick Bihan-Faou <patrick@mindstep.com> (1)

Update boot0cfg to handle the new boot0:
- Allow for boot0 to be more than one sector long. However, ensure that it
its length is a multiple of the sector length.
- Change the signatures used to determine a valid boot0 as some of the
signature code changed.
- Use the old signature to detect version 1.0 of boot0, otherwise read the
version number from boot0 itself.

$Id$ -> $FreeBSD$

Check that we really have a boot0 mbr before treating it as one.

Suggested by: peter

Also add a few comments.

Ensure that an update takes place when the -m option is used.

Implement -m option to enable/disable slices.

Finish implementing "setdrv" option. This is intended to be used
(with care) in those instances where boot0 is not passed the
correct drive number by the PC BIOS. (The symptoms are a
"F5 Drive 0" line, even though the current drive is drive 0.)

Make various minor corrections.

This commit was generated by cvs2svn to compensate for changes in r44196,
which included commits to RCS files with non-trunk default branches.