Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

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

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

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

Port ppp(8) to utmpx.

A nice thing about utmpx is that it makes it very easy to log sessions
that don't use TTYs. This is because the file is not indexed by TTY
slots anymore.

Silence from: brian

Remove whitespace at the end of lines.

Coerce pid_t to long rather than int for better portability.

Suggested by: Theo de Raadt <deraadt@openbsd.org>

Don't drop the last character from ut_line in ID0logout().

PR: 35531
MFC after: 2 weeks

setproctitle() doesn't need to be called with root privs, so move
it from id.c into defs.c

If the first character of the ``set title'' argument is `-',
put it into the format string, supporting ps's tweak to
setproctitle().

include stdlib.h (setproctitle() is prototyped there in OpenBSD)

Call MkSockNode() as uid 0

Forgotten by: julian

Fix ``set proctitle'' by using setproctitle().

Use modfind() to check if a kld is already loaded.

Submitted mostly by: green

Don't (unnecessarily) parse wtmp, force ID0logout() to DTRT instead.

Do a kldload() if we get ENXIO trying to open /dev/tun0

Originally submitted by: green

$Id$ -> $FreeBSD$

o Fix remaining sizeof problems for 64 bit machines.
o Allow ``set ....'' when we have multiple links but aren't in
multilink mode.
o Do a TLS when we receive a ``Open'' event in ``Closed'' state,
despite the rfc state transition table. This is clearly an
error in the RFC as TLS cannot have yet been called (without
TLF) in the ``Closed'' state.
I've posted a message to comp.protocols.ppp for confirmation.

o If there's a session leader left running for a descriptor
that we're now closing, manually HUP that session leader
so that the tty is fully released.
o Always restart our carrier detect timer in the receiving
process if it was running in the sending process (as we
now *always* pass the descriptor).
o Tweak argv when we go into pause() mode to keep our session
so that ps can see what's going on (without checking for a
`pause' state in `ps -l').

o Don't forget to close our transfer socket if we cannot
generate the data to transfer.
o Transfer uucp lock ownership for the transferred device.
o Don't assume we know the correct values of dev_is_modem and
mbits after the transfer.

MFMP: Make ppp multilink capable.
See the file README.changes, and re-read the man page.

MFMP: Allow 8 character login names.
Do the login()/logwtmp()/logout() as id 0.

Remove unused #includes.
Make various bits static.
Remove unused variables.
Submitted by: eivind

Write to the routing socket as uid 0. It's not good enough
to just open it as uid 0 under OpenBSD.

Add (BSD) copyright headers.

Fix prototypes.
Remove extraneous decls.
Add ``const'' to several places.
Allow ``make NOALIAS=1'' to remove IP aliasing.
Merge with OpenBSD - only the Makefiles vary.

We can now survive a compile with
-Wall -Wbad-function-cast -Wcast-align -Wcast-qual
-Winline -Wmissing-declarations -Wmissing-prototypes
-Wnested-externs -Wpointer-arith -Wredundant-decls
-Wshadow -Wstrict-prototypes -Wwrite-strings -Wchar-subscripts
(although the Makefile just contains -Wall).

Use seteuid() instead of setreuid().
The setreuid() page says seteuid is better !

Introduce ID0 logging.
Stay as the invoking uid as much as possible.
Execution as a normal user is still forbidden for now,
so these changes are pretty ineffective.
The next commit will implement the modifications suggested
on -hackers a number of days ago.