Remove copyright strings ifdef'd out

We've ifdef'd out the copyright strings for some time now. Go ahead and
remove the ifdefs. Plus whatever other detritis was left over from other
recent removals. These copyright strings are present in the comments and
are largely from CSRG's attempt at adding their copyright to every
binary file (which modern interpretations of the license doesn't
require).

Sponsored by: Netflix

usr.bin: 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

Remove $FreeBSD$: one-line .c pattern

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

Mark usage function as __dead2 in programs where it does not return

In most cases, usage does not return, so mark them as __dead2. For the
cases where they do return, they have not been marked __dead2.

Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/735

cmp: Print a summary on SIGINFO.

MFC after: 1 week
Sponsored by: Klara, Inc.
Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D38280

cmp: initialize limit to avoid stack garbage limits

Pointy hat: kevans
Fixes: 4e380e847460 ("cmp: add -n, --bytes to limit number of bytes [...]")
Sponsored by: Klara, Inc.

cmp: add -b, --print-bytes

This is compatible with GNU cmp.

Reviewed by: bapt, markj (earlier version)
Sponsored by: Klara, Inc.
Differential Revision: https://reviews.freebsd.org/D32074

cmp: add -i, --ignore-initial, an alternative to skip1/skip2 args

This is compatible with GNU cmp.

Reviewed by: markj
Sponsored by: Klara, Inc.
Differential Revision: https://reviews.freebsd.org/D32073

cmp: add -n, --bytes to limit number of bytes to compare

This is compatible with GNU cmp.

Reviewed by: markj
Sponsored by: Klara, Inc.
Differential Revision: https://reviews.freebsd.org/D32072

cmp: accept SI suffixes for skip1 and skip2

This is compatible with GNU cmp.

Reviewed by: bapt (earlier version), markj, imp
Sponsored by: Klara, Inc.
Differential Revision: https://reviews.freebsd.org/D32071

cmp: fix -s (silent) when used with skip offsets

-s causes cmp to print nothing for differing files, for use when only
the exit status is of interest.

-z compares the file size first, for regular files, and fails the
comparison early if they do not match.

Prior to this change -s implied -z as an optimization, but this is not
valid when file offsets are specified. Now, enable the -z optimization
for -s only if both skip arguments are not provided / 0.

Note that using -z with differing skip values will currently always
fail. We may want to compare size1 - skip1 with size2 - skip2 instaead,
and in any case the man page should be clarified.

PR: 252542
Fixes: 3e6902efc802ab57fc4e9bf798f2d271b152e7f9
Reported by: William Ahern
Reviewed by: markj
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D28071

cmp: use C99 bool for flags

MFC after: 1 week
Reviewed by: markj
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D28072

Fix handling of rights on stdio streams, take two.

Split the rights-limiting code into two cases: if one of the input
files isn't a regular file, use caph_limit_stream(3) instead of
open-coding the same logic; if both input files are regular files,
and the initial attempts to map them succeed, we limit the rights on
those files to CAP_MMAP_R.

Add a regression test for PR 234885.

PR: 234885
Reviewed by: delphij
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D19216

Revert r343117.

It breaks the special mode specified by passing "-" as one of the
input files. Revert for now while we discuss a fix.

PR: 234885
Reported by: delphij
MFC after: now

Fix handling of rights on stdio streams.

- Limit rights on stdio before opening input files. Otherwise, open()
may return one of the standard descriptors and we end up limiting
rights such that we cannot read from one of the input files.
- Use caph_limit_stdio(), which suppresses EBADF, to ensure that
we don't emit an error if one of the stdio streams is closed.
- Don't bother further limiting rights on stdin when stdin isn't going
to be used. Doing so correctly requires checking for a number of
edge cases, and it doesn't provide any significant benefit.

PR: 234885
Reviewed by: oshogbo
MFC after: 3 days
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D18860

capsicum: use a new capsicum helpers in tools

Use caph_{rights,ioctls,fcntls}_limit to simplify the code.

Convert `cap_enter() < 0 && errno != ENOSYS` to `caph_enter() < 0`.

No functional change intended.

cmp(1): Provide some long options

These match GNU cmp(1) for compatibility where applicable.

Future work might implement the -i option from GNU cmp(1) to express skip
either in terms of both files or of the form "SKIP1:SKIP2" rather than
specifying them as additional arguments to cmp(1).

MFC after: 1 month

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

Restrict stdin if it's not in use.

Reviewed by: emaste, cem
Differential Revision: https://reviews.freebsd.org/D8184

Remove the duplicated code using Capsicum helpers.

Reviewed by: cem, ed, bapt, emaste
Differential Revision https://reviews.freebsd.org/D8140

Move sys/capsicum.h includes after types.h or param.h

This is not actually documented or even implied in style(9). Make the change
to match convention. Someone should document this convention in style(9).

Reported by: jhb
Sponsored by: EMC Dell Isilon

cmp(1): Capsicumify

Reviewed by: allanjude, bapt, oshogbo
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D7912

Remove the advertising clause from UCB copyrighted files in usr.bin. This
is in accordance with the information provided at
ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change

Also add $FreeBSD$ to a few files to keep svn happy.

Discussed with: imp, rwatson

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.

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

Add a -h option to tell cmp not to follow symbolic links.

MFC after: 3 weeks
Sponsored by: Sophos/ActiveState

ANSIify function definitions to avoid a warning.

No need to check for "-" explicitly in getopt() loop.

Exit >1 when an error occurs, regardless of whether -s is specified (SUSv3)

remove __P

Style improvements recommended by Bruce as a follow up to some
of the recent WARNS commits. The idea is:

1) FreeBSD id tags should follow vendor tags.
2) Vendor tags should not be compiled (though copyrights probably should).
3) There should be no blank line between including cdefs and __FBSDIF.

Turn on WARNS=2.
Use __FBSDID().

Make filenames const to avoid a few warnings.
Add FreeBSD tags.

Reviewed by: cmp

Fix a bug introduced in rev 1.8, where special files ended up
being treated like regular files because of missing braces.

PR: 20143

Add the -z flag to check file sizes first
Correct the cmp.1 usage message
Correct the -l/-s incompatibility message

Submitted by: Mark Knight <markk@knigma.org>

Let cmp(1) grow in -x option to print differences in contemporarry hex
format rather than the mixed decimal/octal format of -l.

Tweaks to allow compiling -Wall (mostly adding "const" to char rcsid[]).

Permit hex/octal parameters to cmp, to match what the manual page says.

PR: 3850, 3855

Correct usage string. Program name converted to bold in man page.

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

I don't like what they did to cmp(1) in 4.4 Lite; now it whines all
the time, even with -s. Make cmp SHUT UP about non-existant files
when run with -s.
Submitted by: jkh

BSD 4.4 Lite Usr.bin Sources