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 r315018:
Typo.

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

Add the ability to print out ht emodule specific information in likely formats.
Among other things this gives us the ability to find outthe syscall number of a dynamically loaded syscall that has a dynamicly allocated vector number.

MFC after: 1 week
Sponsored by: Panzura inc.

Add "kldstat -h"; showing module sizes in hex is rather weird.

Reviewed by: emaste@ (earlier version)
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D4969

Add quiet support for kldstat -n

PR: bin/180014
Submitted by: Olivier Cochard-Labbé <olivier@cochard.me>
MFC after: 1 week

In printfile(), exit the process instead of only printing the warning.
This fixes verbose mode when either -i specified non-existent kldfile
id, or the file was unloaded between two kldnext(2) calls.

While there, fix printfile() definition to be style(9)-compliant.

Submitted by: arundel
MFC after: 1 week

Casting size_t to uintmax_t is not necessary anymore. This also
removes the need for stdint.h inclusion.

PR: 146046
Submitted by: Alexander Best <alexbestms@wwu.de>
Reviewed by: kan
MFC after: 1 week

Only show the pathname in verbose output as intended in the last commit (r172862).

Add the full module path name to the kld_file_stat structure
for kldstat(2).

This allows libdtrace to determine the exact file from which
a kernel module was loaded without having to guess.

The kldstat(2) API is versioned with the size of the
kld_file_stat structure, so this change creates version 2.

Add the pathname to the verbose output of kldstat(8) too.

MFC: 3 days

Update usage.

Add '-q' option, which (when used with '-m' option) just tells if the given
module is loaded or compiled into the kernel.
This is useful mostly in startup scripts, when module should be loaded only
if it wasn't compiled into the kernel nor already loaded, eg.:

kldstat -q -m g_eli || kldload geom_eli.ko || err 1 'geom_eli module failed to load.'

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

Add -m option (find module using modfind() and stat it).

Use a better way to calculate POINTER_WIDTH suggested by pjd@.

Decide how much space we need to print a pointer using
sizeof(void *) rather than if __alpha__ is defined.

Validate argument to -i.

Use __FBSDID() to quiet GCC 3.3 warnings.

style(9): use NULL when assigning/comparing a char *,
consitently compare fileid with 0 using == and !=.

Reviewed by: silence on @audit

Make this WARNS=5 clean by using %j and (uintmax_t).

Look at by: sebastian.ssmoller@web.de on audit@

Backout rev 1.8. This really does not give us the version number
of the kld's.

Pointed out by: bp

display version number of each kld module when using
the -v flag.

Properly align the columns of the header on Alpha.

$Id$ -> $FreeBSD$

Cosmetic fix (make header align with data)

Sync. usage string and synopsis. Add rcsid.

a few code style changes:
o start function names in column 1
o sort order of flags in getopt and switch
o don't try to reference progname
o unspam some changes introduced by a 2.2.1-R build box instead of a
-current build box

doc changes:
o document when these commands first appeared
o put email address in angle brakets
o minor mdoc clean up

activate the programs that will be used to manipulate kld modules

fix a few problems with missing headers, warn called with an exit
value, and undeclared getopt vars

these programs now compile -Wall clean (and yes, I know I should use
more than just -Wall) :)

Add utilities for the kernel linker.