MFC r336926:
sed: unsign some indexes to fix sign-compare warnings.

Hinted by: OpenBSD (CVS 1.32)

MFC r312521,r313397:

r312521:

Add testcases for -i with hardlinks and symlinks

The symlink testcase is expected to fail, post-r312519 (the revert of
r312404); mark it so.

r313397:

Don't expect :inplace_symlink_src to fail anymore (post-r313277)

The S_ISREG check was restored, such that the code will again fail with
in-place replacements on symlinks

MFC r312404, r312519, r313277:

Use S_ISREG instead of manual & (also it's better to compare the
result from & and the pattern instead of just assuming it's one bit
value).

Pointed out by Tianjie Mao <tjmao tjmao com>.

MFC r312520:

Integrate contrib/netbsd-tests/usr.bin/sed/t_sed.sh into the FreeBSD test
suite as usr.bin/sed/sed_test

Don't expect :emptybackref to fail -- it succeeds on FreeBSD

Expect :preserve_leading_ws_ia to fail -- it fails on ^/stable/10, but not on
^/stable/11 or ^/head

MFC r289172,r290254:

r289172:

Refactor the test/ Makefiles after recent changes to bsd.test.mk (r289158) and
netbsd-tests.test.mk (r289151)

- Eliminate explicit OBJTOP/SRCTOP setting
- Convert all ad hoc NetBSD test integration over to netbsd-tests.test.mk
- Remove unnecessary TESTSDIR setting
- Use SRCTOP where possible for clarity

r290254:

Remove unused variable (SRCDIR)

MFC r302973:
sed(1): Fix off by one introduced in r299211.

Detected by running the gsed tests.

Submitted by: Mikhail Teterin
PR: 195929

MFC r301138:
sed(1): convert sed to use REG_STARTEND more explicitly.

This is a followup to previous r302228, which only merged the
incomplete r300684 causing a regression.

Reported by: mi
PR: 209387
Taken from: openbsd-tech (Martijn van Duren)

sed(1): convert sed to use REG_STARTEND more explicitly.

Summarizing the findings in the OpenBSD list:

This solves a reproduceable issue with very recent Mesa where REG_NOTBOL
combined with a match at the begin of the string causes our regex library
to treat the word as not begin of word.

Bump __FreeBSD_version: JIC we hit the issue in recent Mesa ports.

PR: 209352, 209387 (exp-run)
Taken from: openbsd-tech (Martijn van Duren)
MFC after: 1 month

sed: rewrite the main loop.

Rewrite the main loop of the "sed s/..." command, shortening it by ten
lines and simplifying it by removing the switch statement implementing
/g, /1, and /2 separately and repetitively.

This will be needed to bring a fix from OpenBSD later.

Obtained from: OpenBSD (schwarze CVS Rev. 1.18)

MFV r299377:
sed.1: Correction for the case insensitive case.

Use the capital I instead of the lowercase.

Submitted by: Mikhail T.

MFC r289677:

Fix a ton of speelling errors

MFC r277802, r277811:

sed: Fix resource leak and dereference after NULL.

process.c:
Protect access against NULL.

main.c:
Prevent outfile overwrite resource leak.

CID: 271181
CID: 1006930

Obtained from: NetBSD

MFC r276832 (partial), r277099

Avoid a warning from gcc48.
Replace __inline GNUism with the standard inline.

MFC r275838;
sed: Bounds check the file path used in the 'w' command.

Modified version of a diff from Sebastien Marie to prevent a crash found
with the afl fuzzer.

Obtained from: OpenBSD (CVS Rev. 1.37)

MFC r269302:

Fix relative numerical addressing (addr,+N).

As a bonus the patch untangles a bit the logic and makes the code
easier to grasp.

PR: 192108

MFC r268193, r268203:

Fix sed(1) usage: the -i extension is not an optional.

MFC r267692, r267703:
Add -u (unbuffered output) after GNU sed.

Obtained from: NetBSD

MFC various moves of tools/regressions/ tests to the new infrastructure.

- r263220 Migrate tools/regression/sbin/ to the new tests layout.
- r263222 Add Makefile missed in r263220.
- r263226 Migrate tools/regression/{usr.bin/lastcomm,usr.sbin}/ to the new tests layout.
- r263227 Migrate most of tools/regression/usr.bin/ to the new tests layout.
- r263345 Expand tabs that sneaked in into spaces.
- r263346 Migrate tools/regression/usr.bin/make/ to the new tests layout.
- r263348 Add Makefiles missed in r263346.
- r263351 Migrate tools/regression/usr.bin/pkill/ to the new tests layout.
- r263388 Mark multi_test as requiring /usr/share/dict/words.
- r263814 Fix path to the run.pl script to let these tests run.
- r264742 Prevent building tests when bootstrapping make.

This is 'make tinderbox' clean.

MFC r259132,r259133,r259143:
Per the resolution of POSIX bug 0000779 (note 0002050) add support for using 'i'
as a case insensitive flag.

Add regression test for recently added 'i' flag in r259132.

the i modifier was added in r259132 since POSIX recently agreed to add
it. Switch uses of /I to /i.

PR: standards/184641

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

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

sed: use getline() instead of fgetln().

In BSD, fgetln() available in libc but in Illumos the Solaris port had to
include it internally. It also seems to have caused problems [1].

Aid portability by using getline() instead.

Reference:
https://www.illumos.org/issues/3820 [1]

Submitted by: Johann 'Myrkraverk' Oskarsson <johann@myrkraverk.com>
Reviewed by: dds
MFC after: 2 weeks

Remove trailing whitespace per mdoc lint warning

Disussed with: gavin
No objection from: doc
Approved by: joel
MFC after: 3 days

Reword '}' description to sound more clear.

Submitted by: dougb
MFC after: 7 days

Update '}' description to reflect reality (and POSIX)

PR: 96236
Submitted by: "Andreas Kohn" <andreas@syndrom23.de>
MFC after: 7 days

sed: Try hard links to make -i target available continually.

When creating a backup file, sed renamed the original before renaming the
changed copy into place, leading to a short time when no file with the
original name was present (usually only visible on SMP systems). Try
creating the backup file using a hard link instead, avoiding this problem.
If creating the hard link fails for any reason, fall back to the old rename
method.

When not creating a backup file, sed already renamed the changed copy onto
the original. This remains unchanged.

I am not adding the suppression of redundant fchown/fchmod to this commit,
because FreeBSD appears to check this in the kernel (for msdosfs at least).

PR: bin/153261
Submitted by: Pedro F. Giffuni
Reviewed by: dds (older version)
Obtained from: Illumos
MFC after: 2 weeks

Make -r mean exactly the same thing as -E for increased compatibility
with GNU sed.

MFC after: 7 days

Build usr.bin/ with WARNS=6 by default.

Also add some missing $FreeBSD$ to keep svn happy.

Revert most part of 200420 as requested, as more review and polish is
needed.

Remove unneeded header includes from usr.bin/ except contributed code.

Tested with: make universe

IEEE Std 1003.1, 2004 Edition states:

"The escape sequence '\n' shall match a <newline> embedded in
the pattern space."

It is unclear whether this also applies to a \n embedded in a
character class. Disable the existing handling of \n in a character
class following Mac OS X, GNU sed version 4.1.5 with --posix, and
SunOS 5.10 /usr/bin/sed.

Pointed by: Marius Strobl
Obtained from: Mac OS X

Follow POSIX (IEEE Std 1003.1, 2004 Edition) in the implementation
of the y (translate) command.

"If a backslash character is immediately followed by a backslash
character in string1 or string2, the two backslash characters shall
be counted as a single literal backslash character"

Pointed by: Marius Strobl
Obtained from: Mac OS X

Allow [ to be used as a delimiter.

Pointed by: Marius Strobl
Obtained from: Apple

Bump the document date to reflect the recent address range enhancements.

Suggested by: throdes

Implement "addr1,+N" ranges - not dissimilar to grep's -A switch.

PR: 134856
Submitted by: Jeremie Le Hen - jeremie at le-hen dot org

Fix the code to conform to the "or more" part of the following POSIX
specification and regression test regress:25.

"A function can be preceded by one or more '!' characters, in which
case the function shall be applied if the addresses do not select
the pattern space."

MFC after: 2 weeks

Add workaround for a back reference when no corresponding
parenthesized subexpression is defined. For example, the
following command line caused unexpected behavior like
segmentation fault:

% echo test | sed -e 's/test/\1/'

PR: bin/126682
MFC after: 1 week

Correct a silly typo I introduced: withing -> within.

Noticed by: das

Explicitly tell that one needs to start a context address with a
backslash if he/she wants to use a non-traditional delimiter, i.e.,
anything other than a slash. That is, /abc/ works as is, but xabcx
needs to be spelled as \xabcx.

Add appropriate markup.

Bump Dd.

Checked with: IEEE Std 1003.1, 2004 Edition
MFC after: 3 days

WARNS fixes:
1) Add missing parens around assignment that is compared to zero.
2) Make some variables that only take non-negative values unsigned.
3) Some casts/type changes to fix other constness warnings.
4) Make one variable a const char *.
5) Make sure termwidth is positive, it doesn't make sense for it to be negative.

Approved by: dds

Fix visibility of "inplace".
Found by: CScout

Before doing compile_re() which needs a parameter to identify
whether we should ignore case, determine the flag by calling
compile_flags() first. Also, make sure that we obtain an
initialized cmd->u.s buffer before processing further. We
may want to refine this solution later, but for now, make
the changes in order to unbreak world build after a sed(1)
with rev. 1.29 of compile.c is installed.

Approved by: re (hrs)

Add case-insensitive matching to sed, using the 'I' flag, similarly to GNU sed.
For example,
sed /foo/Id
sed s/foo/bar/Ig

Reviewed by: dds
Approved by: re (hrs)

Drop the argument to the OUT macro because it can't emit
anything but the pattern space anyway. Apply style(9)
to the macro.

Tested with: md5(1)

Don't forget to clear out the hold space for each subsequent file
when in -i mode so that each file gets a clean context of its own.

Add a regression test for the bug.

Tested with: regression tests

There is a symbolic antonym for REPLACE as a flag to cspace()
and mf_fgets(): APPEND. So use it instead of a 0 constant for
clarity.

Tested with: md5(1)

Don't forget to bump document date after changing the content.

Change the semantics of -i (in-place editing) so that it treats
each file independently from other files. The new semantics are
desired in the most of practical cases, e.g.: delete lines 5-9
from each file.

Keep the previous semantics of -i under a new option, -I, which
uses a single continuous address space covering all files to edit
in-place -- they are too cool to just drop them.

Add regression tests for -i and -I.

Approved by: dds
Compared with: GNU sed
Discussed on: -hackers
MFC after: 2 weeks

style(9):
Use a single space before $FreeBSD$ to avoid terminal line overflow.

Pointed out by: ru (The All-Seeing Eye)

Add an important detail to paragraph 12: the range is reset only if its
second address is a line number.

Reflect the change in rev. 1.44 of process.c.

Add $FreeBSD$ to please commit_prep.pl.

Don't forget to close the range if we branched over its end
and had no chance to match it by the 2nd address precisely.
Otherwise the unclosed range would bogusly extend to the end
of stream.

Add a basic regression test for the bug fixed. (This change
also fixes the more complex case 5.3 from `multitest.t'.)

Compared with: SUN and GNU seds
Tested by: regression tests
MFC after: 1 week

Prevent foot-shooting in advance: Put the MATCH() macro's value
in parentheses. The ?: operator has a remarkably low precedence, so
expressions like (MATCH(foo) && bar) would have an unexpected meaning
w/o the parentheses around MATCH().

Tested with: md5(1)

This trivial change should fix at least 3 similar bugs. All of
them are related to the `c' function's need to know if we are at
the actual end of the address range. (It must print the text not
earlier than the whole pattern space was deleted.) It appears the
only sed function with this requirement.

There is `lastaddr' set by applies(), which is to notify the `c'
function, but it can't always help because it's false when we are
hitting the end of file early. There is also a bug in applies()
due to which `lastaddr' isn't set to true on degenerate ranges such
as `$,$' or `N,$' if N appears the last line number.

Handling early EOF condition in applies() could look more logical,
but it would effectively revert sed to the unreasonable behaviour
rev. 1.26 of main.c fought against, as it would require lastline()
be called for each line within each address range. So it's better
to call lastline() only if needed by the `c' function.

Together with this change to sed go regression tests for the bugs
fixed (c1-c3). A basic test of `c' (c0) is also added as it helped
me to spot my own error.

Discussed with: dds
Tested by: the regression tests
MFC after: 1 week

Make the comment for cspace() match reality.

Test files repo-copied into tools/regression/usr.bin/sed and integrated
into the regression testing framework.

Fix using "P" command on empty pattern space. If the "P" command is
used once on a non-empty pattern space and then again on an empty
pattern space, the second usage restores the pattern space length to
the length that it had when the first "P" was used.

PR: bin/96052
Submitted by: Andrey Zholos <aaz@althenia.net>
MFC after: 7 days

The function inplace_edit() doesn't exist anymore, remove the prototype.

Submitted by: Leonardo Chiquitto Filho

Bug fix: a numeric flag specification in the substitute command would
cause the next substitute flag to be ignored.
While working at it, detect and report overflows.

Reported by: Jingsong Liu
MFC after: 1 week

Markup and wording fixes.

Approved by: re (blanket)

Add option -l, to make output line buffered.

PR: bin/78692
Submitted by: Eugene Grosbein
MFC after: 2 weeks

Remove unused variables.

Fix dubious C code construct.

Expand *n't contractions.

Include missing headers.

Added the EXIT STATUS section where appropriate.

Scheduled mdoc(7) sweep.

Per letter dated July 22, 1999 remove 3rd clause of Berkeley derived
software (original contributor).

Reviewed by: imp

Document the limitation that multibyte characters cannot be used as
delimiters with the 's' and 'y' commands.

Document the -E and -a options as being extensions.

Update BUGS section to reflect current state of multibyte character support.

Make the 'y' (translate) command aware of multibyte characters.

Overhaul lputs() to deal with multibyte characters, characters that take
up more than one column position, and null bytes.

Document missing multibyte character support in utilities specified
by POSIX.

Mechanically kill hard sentence breaks.

Removed trailing whitespace.

Plug a file descriptor leak.

When sed is asked to inline-edit files, it forgets to close the temporary
file and runs out of descriptors for long command lines (assuming you reset
kern.maxfilesperproc to something sane that's less than the number of files
passed to sed).

A new version that does exponents and lots of other neat things. Update
from the original author of math.sed.

Submitted by: K S Braunsdorf <sed@ksb.npcguild.org>

Avoid using .Nm at the start of the sentence.

Fix the case where the file is not in the current directory.

Discovered by: Vladimir Kravchenko <jimson@mostcom.ru>
Pointy hat to: des

Reimplement in-place editing in a slightly less disgusting manner. Also,
make an effort to preserve the ownership and mode of the file we are
editing.

Sponsored by: Registrar AS

Whitespace cleanup

ANSIfy

Correct style bugs in the in-place editing code.

Change the buffer length test in NEEDSP() so that it does not
subtract one unsigned number from another potentially smaller
one, leading to wraparound (and heap corruption, eventually).

PR: 58813
MFC after: 2 weeks

Fixed .Nm element, updated HISTORY section, added AUTHORS section.

Reviewed by: schweikh (mentor)
MFC after: 2 weeks

Test 8.16 in sed.test tests the ability of a sed to handle an empty
regular expression as the first argument to a substitute command. If
used to test a sed which (erroneously) evaluates this at translation
time rather than at execution time, the bugged sed is put into an
infinite loop. This mode of failure seems excessive. Such a failing
sed is the Free Software Foundation's sed 3.02.

The specific test was also not being executed for the BSD sed.

Both problems are now fixed.

PR: misc/25585
Submitted by: Walter Briscoe <w.briscoe@ponl.com>
Approved by: schweikh (mentor)
MFC after: 2 weeks

Do not dribble zero bytes into the output, by replacing an obfuscated if
whose true and false clauses were equivalent with a check that we are
not about to stumble off the end of the line.

Reported by: peter
Pointy hat to: fanf

Fix substitution when the regex matches the zero-length string.
There are two bugs: in the s///g case, the substitution didn't occur
at the end of the line; in the s///N case, the code didn't count
forwards along the line properly. See the sg, s3, s4, and s5 tests
in src/tools/regression/usr.bin/sed/.

Reviewed by: tjr

Correct typos, mostly s/ a / an / where appropriate. Some whitespace cleanup,
especially in troff files.

mdoc(7) police: markup polishing.

Approved by: re

Initialize a variable in order to fix when faced with picky compilers.

Sponsored by: Apple

Correct boundary condition error in `D' and `P' commands when the last
line of the pattern space is empty. Don't emit spurious newline when
EOF is reached with the `N' command.

Pointed out by: Oleg Osyka
MFC after: 1 week

Fix some bugs in in-place editing:
(1) errors from freopen were not reported correctly
(2) large files were not handled correctly
(3) read-only files broke things

MFC after: 1 week

Ignore leading semicolons on commands; required by SUSv3.

Obtained from: NetBSD (kleink, Aymeric Vincent)

s/inline/__inline/

Make cspace()'s second argument const. Make `escapes' in lputs() const.

Silence WARNS=4 by passing a non-const buffer to regerror(). Since it
doesn't actually use the buffer when errbuf_size == 0, pass NULL.

Update another mention of <CR><CR> I missed the first time around (rev 1.2)

Note that two carriage returns aren't required after entering the
initial setup anymore (since process.c rev. 1.25). Add $FreeBSD$.

MFC after: 2 weeks

Avoid checking whether each line is the last line of the file when we don't
need to know. Instead, check when we are trying to match a "$" address.
This does not change the way sed processes regular files, but makes it behave
more sensibly when used interactively.

PR: 40101
MFC after: 2 weeks

Don't let the pattern space become null if the `x' command is used when the
hold space is null; some functions assume it's never null.

MFC after: 3 days

Sort sections, and refer to sed as a utility, not a function.

Fix off by one in `y' (transliterate) command which caused the last character
of the pattern space not to be examined.

Noticed by: Motoyuki Konno <motoyuki@bsdclub.org>

Now that the pattern space contains no trailing newline, modify the `l'
command's output so it's the same as what SUSv3 specifies.

Don't store newlines at the end of each line in the hold/pattern spaces,
instead add the newline when the pattern space is printed. Make the `G' and
`H' commands add a newline to the space before the data, remove bogus
addition of newline from `x' command.

PR: 29790, 38195

Kill superfluous blank line.

Correct the handling of (for example) the N command by only zeroing the
input space in mf_fgets() if we reach the end of all input files.

Exit with non-zero status if an input file can not be opened. This was
broken by rev. 1.22.

Fix one serious bug and one potential problem with in-place editing code:

- original version of code worked incorrectly when more than one
input files were specified - it was moving the last line from the 1st file
to be the first line of the 2nd, last line of the 2nd to be the first
line of the 3rd and so on;

- use mmap()->write() to create temporary file instead of
malloc()->read()->write(), which was not only slower, but also did not
bother to free allocated memory once backup file was created, potentially
leading to memory exhausting when regex is applied to a big file or a large
number of small ones.

Refer to environ(7) for description of COLUMNS instead of describing it
in-line. Document effects of locale environment variables in the same way.

The 10 occurrence limit for the `s' command documented here has not existed
for a very long time (or never did exist).

Newlines are not escaped anymore.

Don't write escape newlines with `l' command (SUSv3)

Correctly handle global substitutions where the pattern is only "$", the
EOL anchor, when the last input line does not end in a newline character.
Picked up by the GNU sed test suite.

Wrap lines correctly for the `l' command.

Document the fact that the `l' command uses the COLUMNS environment
variable (SUSv3)

Ignore COLUMNS environment variable if it is empty (SUSv3)

Fix a bug in sed(1)'s "s" command wherein if an escape ("\" character)
was initiated at the last character of the line buffer, the Wrong
Thing was done and sed barfed by interpreting the following NUL byte
as a digit. Instead, pull up the next buffer and record that the "\"
was last seen.

mdoc(7) police: typo in .Dd.

If a file argument cannot be processed, process the remaining ones
and exit non-zero (SUSv3)

More consistancy. file system > filesystem

o Clean up tmp file usage a little by using mkstemp(3) instead of
mktemp(3). It would be amazingly unlikely, but the former method
could result in a symlink attack. A better solution would use
${TMPDIR}, though.
o Make sed not overwrite old backup files with no warning.

Oops, update usage() to have -i.

Add handling for any nil-length string passed to -i for the backup extension.

Add a note that this is kinda-sorta dangerous to the manual page.

Un-shadow the `fname' variable.

Add a -i option to sed(1) to do inplace editing, to give us an alternative to
Perl for such things. The key difference to Perl is that a backup extension
*MUST* be specified, because on one hand it isn't recommended to have options
which optionally take a parameter, and on the other hand, it'd be slightly
unpleasent to implement proper handling for that.

The difference between this and the version posted to developers@ is that it
does handle multiple files in argv after the getopt(3) handling "correctly",
in that the inplace editing-specific code has been moved out to a function,
and that function is used beyond the first file in our linked list.

This option has been documented as FreeBSD-specific in the manpage.

Reviewed by: developers@ (got feedback from: des, fanf, sobomax, roberto,
obrien)
MFC after: 1 week

Remove duplicated text.

PR: docs/37287
Submitted by: Tony Finch <dot@dotat.at>
MFC after: 3 days

Fix an ages-old bug in sed(1), which resulted in the absolutely valid
substitution expressions in the form `s,[fooexp],[barexp],;...' treated
as invalid when the third `,' is (_POSIX2_LINE_MAX * N)-th character in
the line.

MFC after: 2 weeks

Fix sed(1) in the case where a last line is specified and hold space is not
specified, and then the first part of the pattern space is deleted, when
there are two or more input lines, as this results in subtraction of one from
an unsigned integral value of '0'. That bogus value is used in one case
for a loop (that will run far too many times in this case) and a function to
search for a value within a specified range of memory, however now the range
of memory is obscenely large and a segmentation fault will occur. This is
fixed by checking for and appropriately handling a nil pattern space as if
the specified search in memory failed, as indeed it obviously will with nil
pattern space.

Submitted by: Tim J. Robbins <tim@robbins.dropbear.id.au>
PR: bin/34813
Reviewed by: mike
MFC after: 1 day

Fix sed(1) behaviour for 'G' when given null holdspace by making sure it
contains a \n.

PR: misc/26153
Submitted by: ashp
Reviewed by: mike
Obtained from: NetBSD
MFC after: 2 days

remove __P

Remove NO_WERRORs and WARNS=n's. To be revisited after GCC3.

WARNS=2 partial fix; use NO_WERROR to protect against some hard-to-fix warnings.

Use __FBSDID(), kill register keyword.

Don't allocate a zero byte segment.

PR: bin/11900
MFC after: 2 weeks

mdoc(7) police: utilize the new .Ex macro.

mdoc(7) police:

Avoid using parenthesis enclosure macros (.Pq and .Po/.Pc) with plain text.
Not only this slows down the mdoc(7) processing significantly, but it also
has an undesired (in this case) effect of disabling hyphenation within the
entire enclosed block.

Expand xmalloc in-place, along with xrealloc; which wasn't even ANSI in its
implementation.

Don't leak memory when compiling text following the `a', `c' or `i' command.

Testcase:

echo FOO | sed "/FOO/c\\
`jot -b 'aaaa\' 500`"

Submitted by: Max Khon <fjoe@newst.net>

mdoc(7) police: use the default ``file ...'' feature of the .Ar macro.

Prepare for mdoc(7)NG.

Prepare for mdoc(7)NG.

mdoc(7) police: use the new features of the Nm macro.

Avoid use of direct troff requests in mdoc(7) manual pages.

Small style fix '=' -> ' = '

Fix compatibility issue in sed. Do so by explicitely adding a
newline to the end of any -e argument.

PR: bin/18474

Add DIAGNOSTICS section name

Uncorrupt the SCCS id (s/ From: / /).
Put a tab before the comment for "rflags".

Submitted by: bde

Fix a couple hard sentence breaks I inadvertently introduced. Also,
update a bit of English into something easier to read.

Prompted by: sheldonh (thanks!)

Add a new flag: -E enables "extended" regular expressions.

Add $FreeBSD$.

PR: 10850
Submitted by: Scott Hazen Mueller <scott@zorch.sf-bay.org>

Escape the ':' so that is actually makes it into the double quotes.

PR: 15775
Submitted by: Martin Kammerhofer <mkamm@gmx.net>

$Id$ -> $FreeBSD$

Add $Id$, to make it simpler for members of the translation teams to
track.

The $Id$ line is normally at the bottom of the main comment block in the
man page, separated from the rest of the manpage by an empty comment,
like so;

.\" $Id$
.\"

If the immediately preceding comment is a @(#) format ID marker than the
the $Id$ will line up underneath it with no intervening blank lines.
Otherwise, an additional blank line is inserted.

Approved by: bde

More egcs warning fixes:
o main returns int not void
o use return 0 at end of main when needed
o use braces to avoid potentially ambiguous else
o don't default to type int
o #ifdef 0 -> #if 0

Reviewed by: obrien and chuckr

Fix a new bug introduced by the previous bug fix

Fix brokenness compiling "s/pat/subst/" when length of subst is >= 4090 chars.
PR: bin/7939

Compile -Wall

Terminate our output string correctly if we've got
an ``a'' command that has an escaped newline on the
last line of the last script that we're processing.

This fixes exmh2/scripts/build when /etc/malloc.conf -> AJ

Make 'y' command 8bit clean
PR: 6458

Remove local redefinition for err(). Add usage().

Show the real revision date and not the date that this
manpage is being viewed.

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

Add a missing '\' to some text.

Obtained from: NetBSD-bugs mailing list PR# 3321

fix C programmer's bug number 12.2

submitted by: bruce

Fix the C programmer's bug #1: EOF is of type `int', not `char'.

Strong 2.2 candidate.

Submitted by: wosch

Make it at least semi-worked

Localize it
8bit cleanup

Yet^2 another fix for the line continuation bug.

The fundamental problem with the original code is that it accesses
p[-2] which is one before the beginning of the input buffer for
empty lines. rev.1.6 just moved the problem from failures when
p[-2] happens to be '\\' to failures when it happens to be '\0'.
rev.1.5 was confused about the trailing newline and other things.

I went back to rev.1.5 and fixed it. The result is the same as
Keith Bostic's final version in PR 1356 except it loses more
gracefully for excessively long input lines.

Yet another fix for the line continuation bug in sed. Keith's patch
introduced a new bug. This fix appears to work correctly. Fixes PR#1350.

Submitted by: mark@linus.demon.co.uk (Mark Valentine)

Fix from Keith Bostic <bostic@bsdi.com> for bug in sed dealing with
continuation lines.

Submitted by: Keith Bostic via Kirk McKusick

Merge various fixes from NetBSD. This will allow the WordPerfect for
SCO installation to run all the way through (some POSIX fixes).

Remove trailing whitespace.

Sed dumps core when linked with some coalescing malloc because it
doesn't initialize malloced structure.

Submitted by: vode@hut.fi

Fix spelling error (scipt -> script).
Submitted by: <jhawk@MIT.EDU>
Obtained from: NetBSD-bugs mailling list

Correct a bug in the P function: according to 7th edition UNIX (tm), the
newline must be part of the pattern space i.e. `echo a|sed -e P' must print
a
a
and not
aa
This is consistent with gnu sed, SunOS, Ultrix (and probably others!)

Submitted by: Philippe Charnier
Fixed a little typo: lable -> label.

This commit was generated by cvs2svn to compensate for changes in r1590,
which included commits to RCS files with non-trunk default branches.