ed(1): Fix grammar in comment

Event: Advanced UNIX programming course (Fall'23) at NTHU
Pull Request: https://github.com/freebsd/freebsd-src/pull/1025

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

Remove $FreeBSD$: one-line .c pattern

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

Drop ed(1) "crypto"

You should not be using DES. You should not have been using DES for the
past 30 years.

The ed DES-CBC scheme lacked several desirable properties of a sealed
document system, even ignoring DES itself. In particular, it did not
provide the "integrity" cryptographic property (detection of tampering), and
it treated ASCII passwords as 64-bit keys (instead of using a KDF like
scrypt or PBKDF2).

Some general approaches ed(1) users might consider to replace the removed
DES mode:

1. Full disk encryption with something like AES-XTS. This is easy to
conceptualize, design, and implement, and it provides confidentiality for
data at rest. Like CBC, it lacks tampering protection. Examples include
GELI, LUKS, FileVault2.

2. Encrypted overlay ("stackable") filesystems (EncFS, PEFS?, CryptoFS,
others).

3. Native encryption at the filesystem layer. Ext4/F2FS, ZFS, APFS, and
NTFS all have some flavor of this.

4. Storing your files unencrypted. It's not like DES was doing you much
good.

If you have DES-CBC scrambled files produced by ed(1) prior to this change,
you may decrypt them with:

openssl des-cbc -d -iv 0 -K <key in hex> -in <inputfile> -out <plaintext>

Reviewed by: allanjude, bapt, emaste
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D17829

ed(1): Allow the omission of one address in (.,.) and (.;.) address ranges

With this patch, ",n" is an abbreviation for "1,n", ";n" abbreviates
".;n". The "n," and "n;" variants mean "n,n" and "n;n", respectively.
Also, piping to a shell command does not count as a save, so don't reset
the modified flag.

Obtained from: OpenBSD (CVS Rev. 1.58, 1.59)

ed(1): Prevent possible overflows during allocation.

Make sure the parameters used for malloc(3) can hold size_t sizes.
This should help ed(1) handle bigger data in the future.

MFC after: 2 weeks

ed(1): Prevent possible string overflows

Use strlcpy instead of strncpy to guarantee NULL termination.

Pointed out by: imp
CID: 1007252
X-MFC with: r292454

ed(1): Prevent possible string overflows

CID: 1007252
MFC after: 2 weeks

Fix warnings found by -Wmising-variable-declarations.

This self-written compiler warning, which is hopefully going to be
committed into LLVM sources soon, warns about potentially missing
`static' keywords, similar to -Wmissing-prototypes.

- bin/pax: Move external declaration of chdname and s_mask into extern.h.
- bin/setfacl: Move setfacl.c-specific stuff out of setfacl.h.
- sbin/mount_fusefs: Remove char *progname; use getprogname().
- others: add `static' where possible.

Fix some obtuse fprintf tricks in bin/ed.

MFC after: 1 week

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.

ed(1): make WARNS=6 clean

Although argc and argv are never read after the longjmp is complete,
gcc is not clever enough to see that and needlessly warns about it.
So add volatile to silence the compiler.

Approved by: ed (the co-mentor, not ed(1))

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

while(0); -> while (0) in multiline macro

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

no need to have break; after return;

Quiet warnings about copyright[].

Replace various spellings with FALLTHROUGH which is lint()able

Consistently use __FBSDID

We have a place for extern declarations of global variables in ed.h, do not
use main() to do it locally.

o __P has been reoved
o Old-style K&R declarations have been converted to new C89 style
o register has been removed
o prototype for main() has been removed (gcc3 makes it an error)
o int main(int argc, char *argv[]) is the preferred main definition.
o Attempt to not break style(9) conformance for declarations more than
they already are.
o gc some #ifdef sun ... #endif code

Approved by: arch@, new style(9)

o Correctly define rcsid.
o Add consts where appropriate.
o Rename some variables that were shadowing global declarations.
o Remove register storage-classes.
o Make errmsg a const, so we can just set error messages instead
of using sprintf/strcpy.
o Set WARNS=2

Reviewed by: bde, des

Back out previous commit: it doesn't help anything since write_file(),
which is also called from handle_hup(), uses stdio(3). Furthermore,
this means that calling exit(3) (via quit()) there is required to
flush the buffer write_file() was working on.

Submitted by: bde

Don't call exit(3) from a signal handler.

Obtained from: OpenBSD

Use PATH_MAX rather than MAXPATHLEN. Also fix a possible off by one
error caused by the -1 being on the wrong side of the comparison.
This would not cause an overflow, as near as I can tell, because we
truncate later anyway. We'd just fail to get a diagnostic for 1024
and 1025 byte file names.

Constify

Include sys/types.h

Fixes a potential buffer overflow with 'ed [MAXPATHLEN + 1 characters]'.

Submitted by: Mike Heffner <spock@techfour.net>
Submitted on: audit@freebsd.org

$Id$ -> $FreeBSD$

Silence some warnings when building on the alpha.

make signal handlers errno safe

Obtained from: OpenBSD (file rev 1.11) - Theo de Raadt <deraadt@openbsd.org>

sccsid -> rcsid and fix some minor nits.

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

Revert $FreeBSD$ to $Id$

Make the long-awaited change from $Id$ to $FreeBSD$

This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.

-Wall cleaning.

Localize it
8bit cleanup

Remove trailing whitespace.

Reviewed by: phk

You will find enclosed some changes to make gcc -Wall more happy in
/usr/src/bin. Note that some patches are still needed in that directory.

I (Joerg) finished most of Philippe's cleanup. /bin/sh will still
need *allot* of work, however.

Submitted by: charnier@lirmm.fr (Philippe Charnier)

Added $Id$

use umask 077 for buffer file

Fixed range address bug: 1,2, == 2,2 not 2,.
Overhauled the name space, reworked some modules and removed the
obsolescent Addison-Wesley copyright.