lib: 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

forkpty: Avoid fd leak if fork() fails.

MFC after: 1 week
Sponsored by: Klara, Inc.
Reviewed by: allanjude
Differential Revision: https://reviews.freebsd.org/D41491

Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

Use __SCCSID() for SCCS IDs.

- Define NO__SCCSID in CFLAGS to preserve existing behavior of omitting
SCCS IDs by default.
- While here, fix the $FreeBSD$ in pw_util.c to use __FBSDID.

Close slave on fork error to prevent pty fd leak.

CID: 978209

General further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 3-Clause license.

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.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.

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

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.

Add missing header.

Remove unneeded call to revoke() inside openpty().

As discussed on the commits list, there is no need to call revoke()
inside openpty(). On RELENG_6 and RELENG_7 unlockpt() will call
revoke(). On HEAD we create pseudo-terminals on demand, so there is no
need to revoke the slave device node.

This change should never be MFC'd, because the implementation we have in
RELENG_6 and RELENG_7 should work flawlessly with older versions of
libc.

Discussed with: jhb
MFC after: never

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

Small cleanups to openpty().

- Pass O_NOCTTY to posix_openpt(2). This makes the implementation work
consistently on implementations that make the PTY the controlling TTY
by default.

- Call unlockpt() before opening the slave device. POSIX mentions that
de slave device should only be opened after grantpt() and unlockpt()
have been called.

- Replace some redundant code by a label.

In theory we could remove a lot of code from openpty() on FreeBSD
-CURRENT, because grantpt(), unlockpt() and revoke() are not needed in
our implementation. We'd better keep them there. This makes the code
still work with older FreeBSD releases and even makes it work on other
non-BSD operating systems.

I've compiled openpty() on Linux. You only need to remove the revoke()
call, because revoke() on Linux always returns -1. Apart from that, it
seems to work like it should.

Reviewed by: jhb

Put back the openpty(3) and ptsname(3) fixes but don't disable ptsname(3)
on pts(4) devices this time. This fixes the issues while leaving pts(4)
enabled on HEAD.

Back out last commit, since it accidentally broke pts.

The security fix will be re-committed soon, hopefully without breaking
anything.

Fix issues which allow snooping on ptys. [08:01]

Fix an off-by-one error in inet_network(3). [08:02]

Security: FreeBSD-SA-08:01.pty
Security: FreeBSD-SA-08:02.libc

Invoke revoke(2) on the slave pty in the pts(4) case (new_openpty()) to
kick off any other users on the device line before using it since
openpty(3) is documented to do this. Note that grantpt(3) does not
call revoke(2), it only adjusts permissions and ownership.

MFC after: 3 days

Bump up the number of ttys supported by pty(4) to 512 by making use of
[pt]ty[lmnoLMNO][0-9a-v].

MFC after: 3 days
Reviewed by: rwatson

Remove California Regent's clause 3, per letter

Teach openpty() how to deal with pts.

ANSIfy, WARNSify, CONSTify. Bit of style(9)-ify.

Tidy up. Sort headers.

Remove 'register' keyword.

Add __FBSDID()s to libutil

In theory it would be perfectly legal for a system administrator to

# cd /dev && ./MAKEDEV pty0 pty3
and/or
# rm -rf /dev/ptyp0

and expect all programs that use openpty() to still try to find available ptys.

$Id$ -> $FreeBSD$

Remove the static declaration from the line[] variable to allow
openpty() to be called from a threaded application.

Now take stdio.h out of files that don't require it.

Protect the copyright comments from reformatting by
indent and make this compile -Wall clean like the
Makefile suggests that it should. :)

Pointed out by: Bruce Evans <bde@zeta.org.au>

Import Lite2's src/lib, except for non-i386 machine-dependent directories,
libc/db, libc/gen/crypt.* and libtelnet. All affected files except 3
unimportant ones have already left the vendor branch.

General -Wall warning cleanup, part I.
Submitted-By: Kent Vander Velden <graphix@iastate.edu>

Bump libutil revision after recent addition of setproctitle().

Install (optional) libutil.h with prototypes for the functions and
document this in the man page.

minor cleanups to the various routines, include the prototype file, declare
return codes etc.

Update to 4.4lite2 (clean up includes; initialize the name of the master
pty correctly (it was broken for calls to openpty() after the first
successful one)).
Obtained from: 4.4lite2

Remove trailing whitespace.

Support for >32 PTYs.
Submitted by: Heikki Suonsivu <hsu@cs.hut.fi>

BSD 4.4 Lite Lib Sources