Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

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

MFC r226712 (sobomax):

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

MFC r226742 (ed):

Build swapon with WARNS=6.

Don't use a variable called stat, because it collides with stat(2).

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

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.

Don't include sys/user.h merely for its side-effect of recursively
including other headers.

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

Approved by: core, imp

Make NULL a (void*)0 whereever possible, and fix the warnings(-Werror)
that this provokes. "Wherever possible" means "In the kernel OR NOT
C++" (implying C).

There are places where (void *) pointers are not valid, such as for
function pointers, but in the special case of (void *)0, agreement
settles on it being OK.

Most of the fixes were NULL where an integer zero was needed; many
of the fixes were NULL where ascii <nul> ('\0') was needed, and a
few were just "other".

Tested on: i386 sparc64

Use __FBSDID() to quiet GCC 3.3 warnings.

- Add a clearer error message for the case where swapon hits the
NSWAPDEV limit.
- Don't warn about devices that are not in use in 'swapoff -a'.
- Re-add behavior mistakenly removed in revision 1.44:
If using 'swapon -a', do not warn if the device is already in use.

PR: 46633
Submitted by: Andy Farkas <andyf@speednet.com.au> (in part)
Reviewed by: mike (mentor)

Remove hack from rev 1.15; getbsize(3)'s original interface has been
restored.

Make the first argument to getbsize(3) a `size_t *'. This is a hack
since getbsize(3) should have `int *' as its first parameter.

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

o remove __P
o remove main prototype

Remove 'register' keyword.
It does not help modern compilers, and some may take some hit from it.
(I also found several functions that listed *every* of its 10 local vars with
"register" -- just how many free registers do people think machines have?)

Include missing header files which define functions for which gcc has
builtins (e.g., exit, strcmp).

Add include of errno.h where needed, remove extern int errno where not.

These commits were inspired by a similar commit to netbsd.

$Id$ -> $FreeBSD$

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

Use warn(3).

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

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

Take out special error message for EINVAL...we really do want it to be
"invalid argument".

Fix -Wall warnings.

Yes I have better things to do, but just now I'm waiting...

This commit was generated by cvs2svn to compensate for changes in r1558,
which included commits to RCS files with non-trunk default branches.

BSD 4.4 Lite sbin Sources

Note: XNSrouted and routed NOT imported here, they shall be imported with
usr.sbin.