FM / bin

/usr/bin

Name	Size	Mode	Actions
.ssh.hmac	65	0644	edit dl rm
a2p	106792	0755	edit dl rm
aclocal	31181	0755	edit dl rm
aclocal-1.11	31181	0755	edit dl rm
addftinfo	23488	0755	edit dl rm
addr2line	25480	0755	edit dl rm
animate	5848	0755	edit dl rm
ar	56624	0755	edit dl rm
as	328392	0755	edit dl rm
aspell	164064	0755	edit dl rm
at	1036	0755	edit dl rm
atq	1038	0755	edit dl rm
atrm	1040	0755	edit dl rm
autoconf	14631	0755	edit dl rm
autoheader	8484	0755	edit dl rm
autom4te	31789	0755	edit dl rm
automake	257062	0755	edit dl rm
automake-1.11	257062	0755	edit dl rm
autoreconf	20233	0755	edit dl rm
autoscan	17065	0755	edit dl rm
autoupdate	33766	0755	edit dl rm
awk	375616	0755	edit dl rm
base64	29240	0755	edit dl rm
bashbug-64	6932	0755	edit dl rm
batch	137	0755	edit dl rm
bdftops	292	0755	edit dl rm
bison	299856	0755	edit dl rm
bunzip2	32936	0755	edit dl rm
bzcat	32936	0755	edit dl rm
bzcmp	2128	0755	edit dl rm
bzdiff	2128	0755	edit dl rm
bzgrep	1677	0755	edit dl rm
bzip2	32936	0755	edit dl rm
bzip2recover	10872	0755	edit dl rm
bzless	1259	0755	edit dl rm
bzmore	1259	0755	edit dl rm
c++	267928	0755	edit dl rm
c++filt	23688	0755	edit dl rm
c2ph	36601	0755	edit dl rm
c89	224	0755	edit dl rm
c99	215	0755	edit dl rm
cal	16784	0755	edit dl rm
captoinfo	49832	0755	edit dl rm
catchsegv	3384	0755	edit dl rm
cc	264472	0755	edit dl rm
chcon	57144	0755	edit dl rm
chrt	9624	0755	edit dl rm
cksum	25272	0755	edit dl rm
cldetect	10689	0755	edit dl rm
clear	4976	0755	edit dl rm
cloudlinux-awp-user	1818	0755	edit dl rm
clwpos-user	1818	0755	edit dl rm
cmp	19248	0755	edit dl rm
col	10904	0755	edit dl rm
colcrt	7920	0755	edit dl rm
colrm	5576	0755	edit dl rm
column	9744	0755	edit dl rm
comm	28456	0755	edit dl rm
compare	5968	0755	edit dl rm
composite	5848	0755	edit dl rm
conjure	5848	0755	edit dl rm
convert	5848	0755	edit dl rm
cpan	11839	0755	edit dl rm
cpp	267912	0755	edit dl rm
crontab	1388	0755	edit dl rm
crontab.cagefs	308048	0755	edit dl rm
csplit	106168	0755	edit dl rm
curl	120512	0755	edit dl rm
cut	41704	0755	edit dl rm
dbiprof	6300	0755	edit dl rm
dbiproxy	5482	0755	edit dl rm
ddate	11448	0755	edit dl rm
diff	81080	0755	edit dl rm
diff3	23480	0755	edit dl rm
dig	133688	0755	edit dl rm
dir	109208	0755	edit dl rm
dircolors	32872	0755	edit dl rm
dirname	23720	0755	edit dl rm
display	5848	0755	edit dl rm
dltest	7232	0755	edit dl rm
dprofpp	24089	0755	edit dl rm
du	95448	0755	edit dl rm
dumphint	554	0755	edit dl rm
dvipdf	1057	0755	edit dl rm
enc2xs	39147	0755	edit dl rm
enchant	13136	0755	edit dl rm
enchant-lsmod	7336	0755	edit dl rm
env	23832	0755	edit dl rm
eps2eps	632	0755	edit dl rm
eqn	137328	0755	edit dl rm
eqn2graph	2242	0755	edit dl rm
expand	27960	0755	edit dl rm
expr	97688	0755	edit dl rm
factor	44696	0755	edit dl rm
fc-cache	13000	0755	edit dl rm
fc-cat	11136	0755	edit dl rm
fc-list	8840	0755	edit dl rm
fc-match	9992	0755	edit dl rm
fc-query	7568	0755	edit dl rm
fc-scan	7872	0755	edit dl rm
file	15680	0755	edit dl rm
find	234512	0755	edit dl rm
find2perl	23614	0755	edit dl rm
flex	332448	0755	edit dl rm
flex++	332448	0755	edit dl rm
flock	10928	0755	edit dl rm
floppy	23616	0755	edit dl rm
fmt	30264	0755	edit dl rm
fold	28024	0755	edit dl rm
font2c	300	0755	edit dl rm
free	9696	0755	edit dl rm
freetype-config	3830	0755	edit dl rm
funzip	22056	0755	edit dl rm
g++	267928	0755	edit dl rm
gawk	375616	0755	edit dl rm
gcc	264472	0755	edit dl rm
gcov	39848	0755	edit dl rm
gencat	23048	0755	edit dl rm
geoiplookup	15064	0755	edit dl rm
geoiplookup6	10904	0755	edit dl rm
geqn	137328	0755	edit dl rm
GET	14519	0755	edit dl rm
getconf	22808	0755	edit dl rm
getent	27776	0755	edit dl rm
getopt	12040	0755	edit dl rm
ghostscript	6760	0755	edit dl rm
gindxbib	27824	0755	edit dl rm
git	1139544	0755	edit dl rm
git-receive-pack	1139560	0755	edit dl rm
git-shell	461304	0755	edit dl rm
git-upload-archive	1139560	0755	edit dl rm
git-upload-pack	471216	0755	edit dl rm
glookbib	33320	0755	edit dl rm
gm	4856	0755	edit dl rm
gmake	170576	0755	edit dl rm
gneqn	255	0755	edit dl rm
gnroff	2401	0755	edit dl rm
gpg	761688	0755	edit dl rm
gpg-agent	297976	0755	edit dl rm
gpg-error	18576	0755	edit dl rm
gpg-zip	3303	0755	edit dl rm
gpg2	761688	0755	edit dl rm
gpgsplit	48536	0755	edit dl rm
gpgv	336480	0755	edit dl rm
gpgv2	336480	0755	edit dl rm
gpic	213616	0755	edit dl rm
gprof	94960	0755	edit dl rm
grefer	122224	0755	edit dl rm
grn	65408	0755	edit dl rm
grodvi	81400	0755	edit dl rm
groff	65424	0755	edit dl rm
groffer	7777	0755	edit dl rm
grolbp	87960	0755	edit dl rm
grolj4	77464	0755	edit dl rm
grops	117008	0755	edit dl rm
grotty	77304	0755	edit dl rm
groups	24408	0755	edit dl rm
gs	6760	0755	edit dl rm
gsbj	337	0755	edit dl rm
gsdj	339	0755	edit dl rm
gsdj500	342	0755	edit dl rm
gslj	340	0755	edit dl rm
gslp	337	0755	edit dl rm
gsnd	264	0755	edit dl rm
gsoelim	23512	0755	edit dl rm
gtbl	98176	0755	edit dl rm
gtroff	354864	0755	edit dl rm
gunzip	61	0755	edit dl rm
gzexe	5935	0755	edit dl rm
gzip	64688	0755	edit dl rm
h2ph	28036	0755	edit dl rm
h2xs	60385	0755	edit dl rm
head	32520	0755	edit dl rm
hexdump	21576	0755	edit dl rm
host	119928	0755	edit dl rm
hostid	22056	0755	edit dl rm
hpftodit	20384	0755	edit dl rm
hunspell	52784	0755	edit dl rm
iconv	60272	0755	edit dl rm
icu-config	11187	0755	edit dl rm
id	28104	0755	edit dl rm
identify	5968	0755	edit dl rm
idn	32488	0755	edit dl rm
ifnames	4049	0755	edit dl rm
import	5848	0755	edit dl rm
indxbib	27824	0755	edit dl rm
infocmp	50960	0755	edit dl rm
infotocap	49832	0755	edit dl rm
install	107200	0755	edit dl rm
instmodsh	4253	0755	edit dl rm
ionice	15112	0755	edit dl rm
ipcrm	9064	0755	edit dl rm
ipcs	19720	0755	edit dl rm
isosize	7320	0755	edit dl rm
ispell	988	0755	edit dl rm
isql	27616	0755	edit dl rm
iusql	21576	0755	edit dl rm
join	40360	0755	edit dl rm
kill	11576	0755	edit dl rm
ld	588496	0755	edit dl rm
ldd	5325	0755	edit dl rm
less	149976	0755	edit dl rm
lessecho	7376	0755	edit dl rm
lesskey	16264	0755	edit dl rm
lesspipe.sh	2804	0755	edit dl rm
lex	332448	0755	edit dl rm
libnetcfg	15724	0755	edit dl rm
libtool	283333	0755	edit dl rm
libtoolize	68161	0755	edit dl rm
lkbib	33544	0755	edit dl rm
locale	38640	0755	edit dl rm
localedef	326880	0755	edit dl rm
logger	11608	0755	edit dl rm
logname	22152	0755	edit dl rm
look	8080	0755	edit dl rm
lookbib	33320	0755	edit dl rm
lprsetup.sh	4661	0755	edit dl rm
lynx	1390984	0755	edit dl rm
m4	208520	0755	edit dl rm
Mail	378720	0755	edit dl rm
make	170576	0755	edit dl rm
mcookie	11032	0755	edit dl rm
md5sum	32472	0755	edit dl rm
mesg	6744	0755	edit dl rm
mkfifo	25272	0755	edit dl rm
mogrify	5848	0755	edit dl rm
montage	5848	0755	edit dl rm
msql2mysql	1956	0755	edit dl rm
mysql	3844478	0755	edit dl rm
mysqlaccess	112528	0755	edit dl rm
mysqladmin	3529601	0755	edit dl rm
mysqlbinlog	3727752	0755	edit dl rm
mysqlcheck	3526305	0755	edit dl rm
mysqldump	3603495	0755	edit dl rm
mysqlimport	3526103	0755	edit dl rm
mysqlshow	3519973	0755	edit dl rm
mysql_config	7016	0755	edit dl rm
mysql_find_rows	3791	0755	edit dl rm
mysql_waitpid	3273073	0755	edit dl rm
my_print_defaults	3275254	0755	edit dl rm
namei	12712	0755	edit dl rm
nano	171784	0755	edit dl rm
neqn	255	0755	edit dl rm
net-snmp-create-v3-user	2961	0755	edit dl rm
nl	98120	0755	edit dl rm
nm	41280	0755	edit dl rm
nohup	26184	0755	edit dl rm
nproc	24264	0755	edit dl rm
nroff	2401	0755	edit dl rm
nslookup	120120	0755	edit dl rm
nsupdate	59528	0755	edit dl rm
objcopy	212264	0755	edit dl rm
objdump	284936	0755	edit dl rm
od	58152	0755	edit dl rm
odbcinst	23328	0755	edit dl rm
odbc_config	6808	0755	edit dl rm
openssl	525600	0755	edit dl rm
pango-querymodules-64	10176	0755	edit dl rm
pango-view	49688	0755	edit dl rm
passwd	1044	0755	edit dl rm
paste	25544	0755	edit dl rm
patch	118104	0755	edit dl rm
pathchk	23752	0755	edit dl rm
pdf2dsc	696	0755	edit dl rm
pdf2ps	901	0755	edit dl rm
pdfopt	547	0755	edit dl rm
perl	7184	0755	edit dl rm
perl5.10.1	7184	0755	edit dl rm
perlbug	44726	0755	edit dl rm
perldoc	224	0755	edit dl rm
perlivp	12303	0755	edit dl rm
perlml	4480	0755	edit dl rm
perlthanks	44726	0755	edit dl rm
pf2afm	495	0755	edit dl rm
pfbtopfa	511	0755	edit dl rm
pfbtops	6776	0755	edit dl rm
pgrep	16144	0755	edit dl rm
php	937	0755	edit dl rm
php-cli	933	0755	edit dl rm
php5	933	0755	edit dl rm
php5-cli	933	0755	edit dl rm
pic	213616	0755	edit dl rm
pic2graph	2563	0755	edit dl rm
pico	171784	0755	edit dl rm
piconv	7337	0755	edit dl rm
pinentry	2602	0755	edit dl rm
pinentry-curses	48600	0755	edit dl rm
pinky	29608	0755	edit dl rm
pkg-config	105888	0755	edit dl rm
pkill	16144	0755	edit dl rm
pl2pm	4531	0755	edit dl rm
pmap	12136	0755	edit dl rm
pod2html	2338	0755	edit dl rm
pod2latex	10255	0755	edit dl rm
pod2man	21175	0755	edit dl rm
pod2text	9080	0755	edit dl rm
pod2usage	3342	0755	edit dl rm
podchecker	3699	0755	edit dl rm
podselect	2527	0755	edit dl rm
post-grohtml	131608	0755	edit dl rm
pr	61768	0755	edit dl rm
pre-grohtml	70640	0755	edit dl rm
precat	5656	0755	edit dl rm
preunzip	5656	0755	edit dl rm
prezip	5656	0755	edit dl rm
prezip-bin	7152	0755	edit dl rm
printafm	386	0755	edit dl rm
printenv	23736	0755	edit dl rm
printf	46344	0755	edit dl rm
protoize	68664	0755	edit dl rm
prove	9369	0755	edit dl rm
ps2ascii	786	0755	edit dl rm
ps2epsi	2772	0755	edit dl rm
ps2pdf	315	0755	edit dl rm
ps2pdf12	260	0755	edit dl rm
ps2pdf13	260	0755	edit dl rm
ps2pdf14	260	0755	edit dl rm
ps2pdfwr	1088	0755	edit dl rm
ps2ps	634	0755	edit dl rm
ps2ps2	704	0755	edit dl rm
psed	53325	0755	edit dl rm
pstruct	36601	0755	edit dl rm
ptx	127064	0755	edit dl rm
pv.sh	1420	0755	edit dl rm
pwdx	6744	0755	edit dl rm
pydoc	78	0755	edit dl rm
python	4864	0755	edit dl rm
python2	4864	0755	edit dl rm
python2.6	4864	0755	edit dl rm
quota	82752	0755	edit dl rm
ranlib	56624	0755	edit dl rm
readelf	302608	0755	edit dl rm
readlink	36360	0755	edit dl rm
recode	40168	0755	edit dl rm
refer	122224	0755	edit dl rm
rename	6752	0755	edit dl rm
renice	7320	0755	edit dl rm
reset	17896	0755	edit dl rm
rev	6784	0755	edit dl rm
rnano	171784	0755	edit dl rm
rpcgen	93000	0755	edit dl rm
run-with-aspell	85	0755	edit dl rm
runcon	28104	0755	edit dl rm
rvim	2288088	0755	edit dl rm
s2p	53325	0755	edit dl rm
scl	18304	0755	edit dl rm
scl_enabled	258	0755	edit dl rm
scl_source	1870	0755	edit dl rm
scp	75848	0755	edit dl rm
screen	383096	0755	edit dl rm
script	12624	0755	edit dl rm
sdiff	23568	0755	edit dl rm
selectorctl	7784	0755	edit dl rm
seq	40280	0755	edit dl rm
setsid	5536	0755	edit dl rm
setterm	20784	0755	edit dl rm
sftp	104528	0755	edit dl rm
sha1sum	36280	0755	edit dl rm
sha224sum	42136	0755	edit dl rm
sha256sum	42136	0755	edit dl rm
sha384sum	48568	0755	edit dl rm
sha512sum	48568	0755	edit dl rm
shred	48896	0755	edit dl rm
shuf	36408	0755	edit dl rm
size	28040	0755	edit dl rm
skill	15104	0755	edit dl rm
slabtop	12888	0755	edit dl rm
slogin	450728	0755	edit dl rm
snice	15104	0755	edit dl rm
snmpconf	26137	0755	edit dl rm
soelim	23512	0755	edit dl rm
spell	122	0755	edit dl rm
splain	17452	0755	edit dl rm
split	52824	0755	edit dl rm
sprof	23104	0755	edit dl rm
sqlite3	52680	0755	edit dl rm
ssh	450728	0755	edit dl rm
ssh-add	163016	0755	edit dl rm
ssh-agent	145480	0755	edit dl rm
ssh-copy-id	1425	0755	edit dl rm
ssh-keygen	203976	0755	edit dl rm
ssh-keyscan	253752	0755	edit dl rm
stat	46152	0755	edit dl rm
stdbuf	60920	0755	edit dl rm
strace	433560	0755	edit dl rm
stream	5848	0755	edit dl rm
strings	28040	0755	edit dl rm
strip	212264	0755	edit dl rm
sum	32096	0755	edit dl rm
tabs	11192	0755	edit dl rm
tac	93720	0755	edit dl rm
tail	57688	0755	edit dl rm
tailf	8520	0755	edit dl rm
tbl	98176	0755	edit dl rm
tclsh	5224	0755	edit dl rm
tclsh8.5	5224	0755	edit dl rm
tee	24184	0755	edit dl rm
test	30248	0755	edit dl rm
tfmtodit	23560	0755	edit dl rm
tic	49832	0755	edit dl rm
time	14136	0755	edit dl rm
timeout	46720	0755	edit dl rm
tload	7824	0755	edit dl rm
tmpwatch	17792	0755	edit dl rm
toe	11392	0755	edit dl rm
top	62448	0755	edit dl rm
tput	11504	0755	edit dl rm
tr	37608	0755	edit dl rm
troff	354864	0755	edit dl rm
truncate	48616	0755	edit dl rm
tset	17896	0755	edit dl rm
tsort	31976	0755	edit dl rm
tty	21928	0755	edit dl rm
tzselect	7131	0755	edit dl rm
uapi	1040	0755	edit dl rm
ul	13416	0755	edit dl rm
unexpand	28056	0755	edit dl rm
uniq	36472	0755	edit dl rm
unix-lpr.sh	4206	0755	edit dl rm
unprotoize	57504	0755	edit dl rm
unzip	167160	0755	edit dl rm
unzipsfx	76968	0755	edit dl rm
uptime	4840	0755	edit dl rm
users	24104	0755	edit dl rm
utmpdump	10936	0755	edit dl rm
vdir	109208	0755	edit dl rm
vim	2288088	0755	edit dl rm
vimdiff	2288088	0755	edit dl rm
vimtutor	2084	0755	edit dl rm
vmstat	20320	0755	edit dl rm
watch	12576	0755	edit dl rm
wc	32616	0755	edit dl rm
wftopfa	284	0755	edit dl rm
wget	357400	0755	edit dl rm
whereis	11456	0755	edit dl rm
which	20768	0755	edit dl rm
who	45016	0755	edit dl rm
whoami	23736	0755	edit dl rm
word-list-compress	6720	0755	edit dl rm
x86_64-redhat-linux-c++	267928	0755	edit dl rm
x86_64-redhat-linux-g++	267928	0755	edit dl rm
x86_64-redhat-linux-gcc	264472	0755	edit dl rm
xargs	44024	0755	edit dl rm
xmlcatalog	15152	0755	edit dl rm
xmllint	58888	0755	edit dl rm
xmlwf	22416	0755	edit dl rm
xsltproc	23536	0755	edit dl rm
xsubpp	4093	0755	edit dl rm
xxd	15160	0755	edit dl rm
yes	22120	0755	edit dl rm
zcmp	67	0755	edit dl rm
zdiff	4459	0755	edit dl rm
zegrep	62	0755	edit dl rm
zfgrep	62	0755	edit dl rm
zforce	2026	0755	edit dl rm
zgrep	5407	0755	edit dl rm
zip	212048	0755	edit dl rm
zipcloak	107104	0755	edit dl rm
zipgrep	2953	0755	edit dl rm
zipinfo	167160	0755	edit dl rm
zipnote	98584	0755	edit dl rm
zipsplit	102680	0755	edit dl rm
zless	1731	0755	edit dl rm
zmore	2605	0755	edit dl rm
znew	5270	0755	edit dl rm
zsoelim	23512	0755	edit dl rm
[	33408	0755	edit dl rm

Edit: /usr/bin/s2p (53325B)

#!/usr/bin/perl
    eval 'exec /usr/bin/perl -S $0 ${1+"$@"}'
	if $running_under_some_shell;
my $startperl;
my $perlpath;
($startperl = <<'/../') =~ s/\s*\z//;
#!/usr/bin/perl
/../
($perlpath = <<'/../') =~ s/\s*\z//;
/usr/bin/perl
/../

$0 =~ s/^.*?(\w+)[\.\w]*$/$1/;

# (p)sed - a stream editor
# History:  Aug 12 2000: Original version.
#           Mar 25 2002: Rearrange generated Perl program.
#           Jul 23 2007: Fix bug in regex stripping (M.Thorland)

use strict;
use integer;
use Symbol;

=head1 NAME

psed - a stream editor

=head1 SYNOPSIS

psed [-an] script [file ...]
   psed [-an] [-e script] [-f script-file] [file ...]

s2p  [-an] [-e script] [-f script-file]

=head1 DESCRIPTION

A stream editor reads the input stream consisting of the specified files
(or standard input, if none are given), processes is line by line by
applying a script consisting of edit commands, and writes resulting lines
to standard output. The filename `C<->' may be used to read standard input.

The edit script is composed from arguments of B<-e> options and
script-files, in the given order. A single script argument may be specified
as the first parameter.

If this program is invoked with the name F<s2p>, it will act as a
sed-to-Perl translator. See L<"sed Script Translation">.

B<sed> returns an exit code of 0 on success or >0 if an error occurred.

=head1 OPTIONS

=over 4

=item B<-a>

A file specified as argument to the B<w> edit command is by default
opened before input processing starts. Using B<-a>, opening of such
files is delayed until the first line is actually written to the file.

=item B<-e> I<script>

The editing commands defined by I<script> are appended to the script.
Multiple commands must be separated by newlines.

=item B<-f> I<script-file>

Editing commands from the specified I<script-file> are read and appended
to the script.

=item B<-n>

By default, a line is written to standard output after the editing script
has been applied to it. The B<-n> option suppresses automatic printing.

=back

=head1 COMMANDS

B<sed> command syntax is defined as

Z<> Z<> Z<> Z<>[I<address>[B<,>I<address>]][B<!>]I<function>[I<argument>]

with whitespace being permitted before or after addresses, and between
the function character and the argument. The I<address>es and the
address inverter (C<!>) are used to restrict the application of a
command to the selected line(s) of input.

Each command must be on a line of its own, except where noted in
the synopses below.

The edit cycle performed on each input line consist of reading the line
(without its trailing newline character) into the I<pattern space>,
applying the applicable commands of the edit script, writing the final
contents of the pattern space and a newline to the standard output.
A I<hold space> is provided for saving the contents of the
pattern space for later use.

=head2 Addresses

A sed address is either a line number or a pattern, which may be combined
arbitrarily to construct ranges. Lines are numbered across all input files.

Any address may be followed by an exclamation mark (`C<!>'), selecting
all lines not matching that address.

=over 4

=item I<number>

The line with the given number is selected.

=item B<$>

A dollar sign (C<$>) is the line number of the last line of the input stream.

=item B</>I<regular expression>B</>

A pattern address is a basic regular expression (see 
L<"Basic Regular Expressions">), between the delimiting character C</>.
Any other character except C<\> or newline may be used to delimit a
pattern address when the initial delimiter is prefixed with a
backslash (`C<\>').

=back

If no address is given, the command selects every line.

If one address is given, it selects the line (or lines) matching the
address.

Two addresses select a range that begins whenever the first address
matches, and ends (including that line) when the second address matches.
If the first (second) address is a matching pattern, the second 
address is not applied to the very same line to determine the end of
the range. Likewise, if the second address is a matching pattern, the
first address is not applied to the very same line to determine the
begin of another range. If both addresses are line numbers,
and the second line number is less than the first line number, then
only the first line is selected.

=head2 Functions

The maximum permitted number of addresses is indicated with each
function synopsis below.

The argument I<text> consists of one or more lines following the command.
Embedded newlines in I<text> must be preceded with a backslash.  Other
backslashes in I<text> are deleted and the following character is taken
literally.

=over 4

=cut

my %ComTab;
my %GenKey;
#--------------------------------------------------------------------------
$ComTab{'a'}=[ 1, 'txt', \&Emit,       '{ push( @Q, <<'."'TheEnd' ) }\n" ]; #ok

=item [1addr]B<a\> I<text>

Write I<text> (which must start on the line following the command)
to standard output immediately before reading the next line
of input, either by executing the B<N> function or by beginning a new cycle.

=cut

#--------------------------------------------------------------------------
$ComTab{'b'}=[ 2, 'str', \&Branch,     '{ goto XXX; }'                   ]; #ok

=item [2addr]B<b> [I<label>]

Branch to the B<:> function with the specified I<label>. If no label
is given, branch to the end of the script.

=cut

#--------------------------------------------------------------------------
$ComTab{'c'}=[ 2, 'txt', \&Change,     <<'-X-'                           ]; #ok
{ print <<'TheEnd'; } $doPrint = 0; goto EOS;
-X-
### continue OK => next CYCLE;

=item [2addr]B<c\> I<text>

The line, or range of lines, selected by the address is deleted. 
The I<text> (which must start on the line following the command)
is written to standard output. With an address range, this occurs at
the end of the range.

=cut

#--------------------------------------------------------------------------
$ComTab{'d'}=[ 2, '',    \&Emit,       <<'-X-'                           ]; #ok
{ $doPrint = 0;
  goto EOS;
}
-X-
### continue OK => next CYCLE;

=item [2addr]B<d>

Deletes the pattern space and starts the next cycle.

=cut

#--------------------------------------------------------------------------
$ComTab{'D'}=[ 2, '',    \&Emit,       <<'-X-'                           ]; #ok
{ s/^.*\n?//;
  if(length($_)){ goto BOS } else { goto EOS }
}
-X-
### continue OK => next CYCLE;

=item [2addr]B<D>

Deletes the pattern space through the first embedded newline or to the end.
If the pattern space becomes empty, a new cycle is started, otherwise
execution of the script is restarted.

=cut

#--------------------------------------------------------------------------
$ComTab{'g'}=[ 2, '',    \&Emit,       '{ $_ = $Hold };'                 ]; #ok

=item [2addr]B<g>

Replace the contents of the pattern space with the hold space.

=cut

#--------------------------------------------------------------------------
$ComTab{'G'}=[ 2, '',    \&Emit,       '{ $_ .= "\n"; $_ .= $Hold };'    ]; #ok

=item [2addr]B<G>

Append a newline and the contents of the hold space to the pattern space.

=cut

#--------------------------------------------------------------------------
$ComTab{'h'}=[ 2, '',    \&Emit,       '{ $Hold = $_ }'                  ]; #ok

=item [2addr]B<h>

Replace the contents of the hold space with the pattern space.

=cut

#--------------------------------------------------------------------------
$ComTab{'H'}=[ 2, '',    \&Emit,       '{ $Hold .= "\n"; $Hold .= $_; }' ]; #ok

=item [2addr]B<H>

Append a newline and the contents of the pattern space to the hold space.

=cut

#--------------------------------------------------------------------------
$ComTab{'i'}=[ 1, 'txt', \&Emit,       '{ print <<'."'TheEnd' }\n"       ]; #ok

=item [1addr]B<i\> I<text>

Write the I<text> (which must start on the line following the command)
to standard output.

=cut

#--------------------------------------------------------------------------
$ComTab{'l'}=[ 2, '',    \&Emit,       '{ _l() }'                        ]; #okUTF8

=item [2addr]B<l>

Print the contents of the pattern space: non-printable characters are
shown in C-style escaped form; long lines are split and have a trailing
`C<\>' at the point of the split; the true end of a line is marked with
a `C<$>'. Escapes are: `\a', `\t', `\n', `\f', `\r', `\e' for
BEL, HT, LF, FF, CR, ESC, respectively, and `\' followed by a three-digit
octal number for all other non-printable characters.

=cut

#--------------------------------------------------------------------------
$ComTab{'n'}=[ 2, '',    \&Emit,       <<'-X-'                           ]; #ok
{ print $_, "\n" if $doPrint;
  printQ() if @Q;
  $CondReg = 0;
  last CYCLE unless getsARGV();
  chomp();
}
-X-

=item [2addr]B<n>

If automatic printing is enabled, write the pattern space to the standard
output. Replace the pattern space with the next line of input. If
there is no more input, processing is terminated.

=cut

#--------------------------------------------------------------------------
$ComTab{'N'}=[ 2, '',    \&Emit,       <<'-X-'                           ]; #ok
{ printQ() if @Q;
  $CondReg = 0;
  last CYCLE unless getsARGV( $h );
  chomp( $h );
  $_ .= "\n$h";
}
-X-

=item [2addr]B<N>

Append a newline and the next line of input to the pattern space. If
there is no more input, processing is terminated.

=cut

#--------------------------------------------------------------------------
$ComTab{'p'}=[ 2, '',    \&Emit,       '{ print $_, "\n"; }'             ]; #ok

=item [2addr]B<p>

Print the pattern space to the standard output. (Use the B<-n> option
to suppress automatic printing at the end of a cycle if you want to
avoid double printing of lines.)

=cut

#--------------------------------------------------------------------------
$ComTab{'P'}=[ 2, '',    \&Emit,       <<'-X-'                           ]; #ok
{ if( /^(.*)/ ){ print $1, "\n"; } }
-X-

=item [2addr]B<P>

Prints the pattern space through the first embedded newline or to the end.

=cut

#--------------------------------------------------------------------------
$ComTab{'q'}=[ 1, '',    \&Emit,       <<'-X-'                           ]; #ok
{ print $_, "\n" if $doPrint;
  last CYCLE;
}
-X-

=item [1addr]B<q>

Branch to the end of the script and quit without starting a new cycle.

=cut

#--------------------------------------------------------------------------
$ComTab{'r'}=[ 1, 'str', \&Emit,       "{ _r( '-X-' ) }"                 ]; #ok

=item [1addr]B<r> I<file>

Copy the contents of the I<file> to standard output immediately before
the next attempt to read a line of input. Any error encountered while
reading I<file> is silently ignored.

=cut

#--------------------------------------------------------------------------
$ComTab{'s'}=[ 2, 'sub', \&Emit,       ''                                ]; #ok

=item [2addr]B<s/>I<regular expression>B</>I<replacement>B</>I<flags>

Substitute the I<replacement> string for the first substring in
the pattern space that matches the I<regular expression>.
Any character other than backslash or newline can be used instead of a 
slash to delimit the regular expression and the replacement.
To use the delimiter as a literal character within the regular expression
and the replacement, precede the character by a backslash (`C<\>').

Literal newlines may be embedded in the replacement string by
preceding a newline with a backslash.

Within the replacement, an ampersand (`C<&>') is replaced by the string
matching the regular expression. The strings `C<\1>' through `C<\9>' are
replaced by the corresponding subpattern (see L<"Basic Regular Expressions">).
To get a literal `C<&>' or `C<\>' in the replacement text, precede it
by a backslash.

The following I<flags> modify the behaviour of the B<s> command:

=over 8

=item B<g>

The replacement is performed for all matching, non-overlapping substrings
of the pattern space.

=item B<1>..B<9>

Replace only the n-th matching substring of the pattern space.

=item B<p>

If the substitution was made, print the new value of the pattern space.

=item B<w> I<file>

If the substitution was made, write the new value of the pattern space
to the specified file.

=back

=cut

#--------------------------------------------------------------------------
$ComTab{'t'}=[ 2, 'str', \&Branch,     '{ goto XXX if _t() }'            ]; #ok

=item [2addr]B<t> [I<label>]

Branch to the B<:> function with the specified I<label> if any B<s>
substitutions have been made since the most recent reading of an input line
or execution of a B<t> function. If no label is given, branch to the end of
the script.

=cut

#--------------------------------------------------------------------------
$ComTab{'w'}=[ 2, 'str', \&Write,      "{ _w( '-X-' ) }"                 ]; #ok

=item [2addr]B<w> I<file>

The contents of the pattern space are written to the I<file>.

=cut

#--------------------------------------------------------------------------
$ComTab{'x'}=[ 2, '',    \&Emit,       '{ ($Hold, $_) = ($_, $Hold) }'   ]; #ok

=item [2addr]B<x>

Swap the contents of the pattern space and the hold space.

=cut

#--------------------------------------------------------------------------
$ComTab{'y'}=[ 2, 'tra', \&Emit,       ''                                ]; #ok
=item [2addr]B<y>B</>I<string1>B</>I<string2>B</>

In the pattern space, replace all characters occuring in I<string1> by the
character at the corresponding position in I<string2>. It is possible
to use any character (other than a backslash or newline) instead of a
slash to delimit the strings.  Within I<string1> and I<string2>, a
backslash followed by any character other than a newline is that literal
character, and a backslash followed by an `n' is replaced by a newline
character.

=cut

#--------------------------------------------------------------------------
$ComTab{'='}=[ 1, '',    \&Emit,       '{ print "$.\n" }'                ]; #ok

=item [1addr]B<=>

Prints the current line number on the standard output.

=cut

#--------------------------------------------------------------------------
$ComTab{':'}=[ 0, 'str', \&Label,      ''                                ]; #ok
 
=item [0addr]B<:> [I<label>]

The command specifies the position of the I<label>. It has no other effect.

=cut

#--------------------------------------------------------------------------
$ComTab{'{'}=[ 2, '',    \&BeginBlock, '{'                               ]; #ok
$ComTab{'}'}=[ 0, '',    \&EndBlock,   ';}'                              ]; #ok
# ';' to avoid warning on empty {}-block

=item [2addr]B<{> [I<command>]

=item [0addr]B<}>

These two commands begin and end a command list. The first command may
be given on the same line as the opening B<{> command. The commands
within the list are jointly selected by the address(es) given on the
B<{> command (but may still have individual addresses).

=cut

#--------------------------------------------------------------------------
$ComTab{'#'}=[ 0, 'str', \&Comment,    ''                                ]; #ok

=item [0addr]B<#> [I<comment>]

The entire line is ignored (treated as a comment). If, however, the first
two characters in the script are `C<#n>', automatic printing of output is
suppressed, as if the B<-n> option were given on the command line.

=back

=cut

use vars qw{ $isEOF $Hold %wFiles @Q $CondReg $doPrint };

my $useDEBUG    = exists( $ENV{PSEDDEBUG} );
my $useEXTBRE   = $ENV{PSEDEXTBRE} || '';
$useEXTBRE =~ s/[^<>wWyB]//g; # gawk RE's handle these

my $doAutoPrint = 1;          # automatic printing of pattern space (-n => 0)
my $doOpenWrite = 1;          # open w command output files at start (-a => 0)
my $svOpenWrite = 0;          # save $doOpenWrite

# lower case $0 below as a VMSism.  The VMS build procedure creates the
# s2p file traditionally in upper case on the disk.  When VMS is in a
# case preserved or case sensitive mode, $0 will be returned in the exact
# case which will be on the disk, and that is not predictable at this time.

my $doGenerate  = lc($0) eq 's2p';

# Collected and compiled script
#
my( @Commands, %Defined, @BlockStack, %Label, $labNum, $Code, $Func );
$Code = '';

##################
#  Compile Time
#
# Labels
# 
# Error handling
#
sub Warn($;$){
    my( $msg, $loc ) = @_;
    $loc ||= '';
    $loc .= ': ' if length( $loc );
    warn( "$0: $loc$msg\n" );
}

$labNum = 0;
sub newLabel(){
    return 'L_'.++$labNum;
}

# safeHere: create safe here delimiter and  modify opcode and argument
#
sub safeHere($$){
    my( $codref, $argref ) = @_;
    my $eod = 'EOD000';
    while( $$argref =~ /^$eod$/m ){
        $eod++;
    }
    $$codref =~ s/TheEnd/$eod/e;
    $$argref .= "$eod\n"; 
}

# Emit: create address logic and emit command
#
sub Emit($$$$$$){
    my( $addr1, $addr2, $negated, $opcode, $arg, $fl ) = @_;
    my $cond = '';
    if( defined( $addr1 ) ){
        if( defined( $addr2 ) ){
	    $addr1 .= $addr2 =~ /^\d+$/ ? "..$addr2" : "...$addr2";
        } else {
	    $addr1 .= ' == $.' if $addr1 =~ /^\d+$/;
	}
	$cond = $negated ? "unless( $addr1 )\n" : "if( $addr1 )\n";
    }

if( $opcode eq '' ){
	$Code .= "$cond$arg\n";

} elsif( $opcode =~ s/-X-/$arg/e ){
	$Code .= "$cond$opcode\n";

} elsif( $opcode =~ /TheEnd/ ){
	safeHere( \$opcode, \$arg );
	$Code .= "$cond$opcode$arg";

} else {
	$Code .= "$cond$opcode\n";
    }
    0;
}

# Write (w command, w flag): store pathname
#
sub Write($$$$$$){
    my( $addr1, $addr2, $negated, $opcode, $path, $fl ) = @_;
    $wFiles{$path} = '';
    Emit( $addr1, $addr2, $negated, $opcode, $path, $fl );
}

# Label (: command): label definition
#
sub Label($$$$$$){
    my( $addr1, $addr2, $negated, $opcode, $lab, $fl ) = @_;
    my $rc = 0;
    $lab =~ s/\s+//;
    if( length( $lab ) ){
	my $h;
	if( ! exists( $Label{$lab} ) ){
	    $h = $Label{$lab}{name} = newLabel();
        } else {
	    $h = $Label{$lab}{name};
	    if( exists( $Label{$lab}{defined} ) ){
		my $dl = $Label{$lab}{defined};
		Warn( "duplicate label $lab (first defined at $dl)", $fl );
		$rc = 1;
	    }
	}
        $Label{$lab}{defined} = $fl;
	$Code .= "$h:;\n";
    }
    $rc;
}

# BeginBlock ({ command): push block start
#
sub BeginBlock($$$$$$){
    my( $addr1, $addr2, $negated, $opcode, $arg, $fl ) = @_;
    push( @BlockStack, [ $fl, $addr1, $addr2, $negated ] );
    Emit( $addr1, $addr2, $negated, $opcode, $arg, $fl );
}

# EndBlock (} command): check proper nesting
#
sub EndBlock($$$$$$){
    my( $addr1, $addr2, $negated, $opcode, $arg, $fl ) = @_;
    my $rc;
    my $jcom = pop( @BlockStack );
    if( defined( $jcom ) ){
	$rc = Emit( $addr1, $addr2, $negated, $opcode, $arg, $fl );
    } else {
	Warn( "unexpected `}'", $fl );
	$rc = 1;
    }
    $rc;
}

# Branch (t, b commands): check or create label, substitute default
#
sub Branch($$$$$$){
    my( $addr1, $addr2, $negated, $opcode, $lab, $fl ) = @_;
    $lab =~ s/\s+//; # no spaces at end
    my $h;
    if( length( $lab ) ){
	if( ! exists( $Label{$lab} ) ){
	    $h = $Label{$lab}{name} = newLabel();
        } else {
	    $h = $Label{$lab}{name};
	}
	push( @{$Label{$lab}{used}}, $fl );
    } else {
	$h = 'EOS';
    }
    $opcode =~ s/XXX/$h/e;
    Emit( $addr1, $addr2, $negated, $opcode, '', $fl );
}

# Change (c command): is special due to range end watching
#
sub Change($$$$$$){
    my( $addr1, $addr2, $negated, $opcode, $arg, $fl ) = @_;
    my $kwd = $negated ? 'unless' : 'if';
    if( defined( $addr2 ) ){
        $addr1 .= $addr2 =~ /^\d+$/ ? "..$addr2" : "...$addr2";
	if( ! $negated ){
	    $addr1  = '$icnt = ('.$addr1.')';
	    $opcode = 'if( $icnt =~ /E0$/ )' . $opcode;
	}
    } else {
	$addr1 .= ' == $.' if $addr1 =~ /^\d+$/;
    }
    safeHere( \$opcode, \$arg );
    $Code .= "$kwd( $addr1 ){\n  $opcode$arg}\n";
    0;
}

# Comment (# command): A no-op. Who would've thought that!
#
sub Comment($$$$$$){
    my( $addr1, $addr2, $negated, $opcode, $arg, $fl ) = @_;
### $Code .= "# $arg\n";
    0;
}

# stripRegex from the current command. If we're in the first
# part of s///, trailing spaces have to be kept as the initial
# part of the replacement string.
#
sub stripRegex($$;$){
    my( $del, $sref, $sub ) = @_;
    my $regex = $del;
    print "stripRegex:$del:$$sref:\n" if $useDEBUG;
    while( $$sref =~ s{^(.*?)(\\*)\Q$del\E(\s*)}{}s ){
        my $sl = $2;
	$regex .= $1.$sl.$del;
	if( length( $sl ) % 2 == 0 ){
            if( $sub && (length( $3 ) > 0) ){
                $$sref = $3 . $$sref;
	    }
	    return $regex;
	}
	$regex .= $3;
    }
    undef();
}

# stripTrans: take a <del> terminated string from y command
#   honoring and cleaning up of \-escaped <del>'s
#
sub stripTrans($$){
    my( $del, $sref ) = @_;
    my $t = '';
    print "stripTrans:$del:$$sref:\n" if $useDEBUG;
    while( $$sref =~ s{^(.*?)(\\*)\Q$del\E}{}s ){
        my $sl = $2;
	$t .= $1;
	if( length( $sl ) % 2 == 0 ){
	    $t .= $sl;
	    $t =~ s/\\\\/\\/g;
	    return $t;
	}
	chop( $sl );
	$t .= $sl.$del.$3;
    }
    undef();
}

# makey - construct Perl y/// from sed y///
#
sub makey($$$){
    my( $fr, $to, $fl ) = @_;
    my $error = 0;

# Ensure that any '-' is up front.
    # Diagnose duplicate contradicting mappings
    my %tr;
    for( my $i = 0; $i < length($fr); $i++ ){
	my $fc = substr($fr,$i,1);
	my $tc = substr($to,$i,1);
	if( exists( $tr{$fc} ) && $tr{$fc} ne $tc ){
	    Warn( "ambiguous translation for character `$fc' in `y' command",
		  $fl );
	    $error++;
	}
	$tr{$fc} = $tc;
    }
    $fr = $to = '';
    if( exists( $tr{'-'} ) ){
	( $fr, $to ) = ( '-', $tr{'-'} );
	delete( $tr{'-'} );
    } else {
	$fr = $to = '';
    }
    # might just as well sort it...
    for my $fc ( sort keys( %tr ) ){
	$fr .= $fc;
	$to .= $tr{$fc};
    }
    # make embedded delimiters and newlines safe
    $fr =~ s/([{}])/\$1/g;
    $to =~ s/([{}])/\$1/g;
    $fr =~ s/\n/\\n/g;
    $to =~ s/\n/\\n/g;
    return $error ? undef() : "{ y{$fr}{$to}; }";
}

######
# makes - construct Perl s/// from sed s///
#
sub makes($$$$$$$){
    my( $regex, $subst, $path, $global, $print, $nmatch, $fl ) = @_;

# make embedded newlines safe
    $regex =~ s/\n/\\n/g;
    $subst =~ s/\n/\\n/g;
 
    my $code;
    # n-th occurrence
    #
    if( length( $nmatch ) ){
	$code = <<TheEnd;
{ \$n = $nmatch;
  while( --\$n && ( \$s = m ${regex}g ) ){}
  \$s = ( substr( \$_, pos() ) =~ s ${regex}${subst}s ) if \$s;
  \$CondReg ||= \$s;
TheEnd
    } else {
        $code = <<TheEnd;
{ \$s = s ${regex}${subst}s${global};
  \$CondReg ||= \$s;
TheEnd
    }
    if( $print ){
        $code .= '  print $_, "\n" if $s;'."\n";
    }
    if( defined( $path ) ){
        $wFiles{$path} = '';
	$code .= " _w( '$path' ) if \$s;\n";
        $GenKey{'w'} = 1;
    }
    $code .= "}";
}

=head1 BASIC REGULAR EXPRESSIONS

A I<Basic Regular Expression> (BRE), as defined in POSIX 1003.2, consists
of I<atoms>, for matching parts of a string, and I<bounds>, specifying
repetitions of a preceding atom.

=head2 Atoms

The possible atoms of a BRE are: B<.>, matching any single character;
B<^> and B<$>, matching the null string at the beginning or end
of a string, respectively; a I<bracket expressions>, enclosed
in B<[> and B<]> (see below); and any single character with no
other significance (matching that character). A B<\> before one
of: B<.>, B<^>, B<$>, B<[>, B<*>, B<\>, matching the character
after the backslash. A sequence of atoms enclosed in B<$> and B<$>
becomes an atom and establishes the target for a I<backreference>,
consisting of the substring that actually matches the enclosed atoms.
Finally, B<\> followed by one of the digits B<0> through B<9> is a
backreference.

A B<^> that is not first, or a B<$> that is not last does not have
a special significance and need not be preceded by a backslash to
become literal. The same is true for a B<]>, that does not terminate
a bracket expression.

An unescaped backslash cannot be last in a BRE.

=head2 Bounds

The BRE bounds are: B<*>, specifying 0 or more matches of the preceding
atom; B<\{>I<count>B<\}>, specifying that many repetitions;
B<\{>I<minimum>B<,\}>, giving a lower limit; and
B<\{>I<minimum>B<,>I<maximum>B<\}> finally defines a lower and upper
bound.

A bound appearing as the first item in a BRE is taken literally.

=head2 Bracket Expressions

A I<bracket expression> is a list of characters, character ranges
and character classes enclosed in B<[> and B<]> and matches any
single character from the represented set of characters.

A character range is written as two characters separated by B<-> and
represents all characters (according to the character collating sequence)
that are not less than the first and not greater than the second.
(Ranges are very collating-sequence-dependent, and portable programs
should avoid relying on them.)

A character class is one of the class names

alnum     digit     punct
   alpha     graph     space
   blank     lower     upper
   cntrl     print     xdigit

enclosed in B<[:> and B<:]> and represents the set of characters
as defined in ctype(3).

If the first character after B<[> is B<^>, the sense of matching is
inverted.

To include a literal `C<^>', place it anywhere else but first. To
include a literal 'C<]>' place it first or immediately after an
initial B<^>. To include a literal `C<->' make it the first (or
second after B<^>) or last character, or the second endpoint of
a range.

The special bracket expression constructs C<[[:E<lt>:]]> and C<[[:E<gt>:]]> 
match the null string at the beginning and end of a word respectively.
(Note that neither is identical to Perl's `\b' atom.)

=head2 Additional Atoms

Since some sed implementations provide additional regular expression
atoms (not defined in POSIX 1003.2), B<psed> is capable of translating
the following backslash escapes:

=over 4

=item B<\E<lt>> This is the same as C<[[:E<gt>:]]>.

=item B<\E<gt>> This is the same as C<[[:E<lt>:]]>.

=item B<\w> This is an abbreviation for C<[[:alnum:]_]>.

=item B<\W> This is an abbreviation for C<[^[:alnum:]_]>.

=item B<\y> Match the empty string at a word boundary.

=item B<\B> Match the empty string between any two either word or non-word characters.

=back

To enable this feature, the environment variable PSEDEXTBRE must be set
to a string containing the requested characters, e.g.:
C<PSEDEXTBRE='E<lt>E<gt>wW'>.

=cut

#####
# bre2p - convert BRE to Perl RE
#
sub peek(\$$){
    my( $pref, $ic ) = @_;
    $ic < length($$pref)-1 ? substr( $$pref, $ic+1, 1 ) : '';
}

sub bre2p($$$){
    my( $del, $pat, $fl ) = @_;
    my $led = $del;
    $led =~ tr/{([</})]>/;
    $led = '' if $led eq $del;

$pat = substr( $pat, 1, length($pat) - 2 );
    my $res = '';
    my $bracklev = 0;
    my $backref  = 0;
    my $parlev = 0;
    for( my $ic = 0; $ic < length( $pat ); $ic++ ){
        my $c = substr( $pat, $ic, 1 );
        if( $c eq '\\' ){
	    ### backslash escapes
            my $nc = peek($pat,$ic);
            if( $nc eq '' ){
                Warn( "`\\' cannot be last in pattern", $fl );
                return undef();
            }
	    $ic++;
            if( $nc eq $del ){ ## \<pattern del> => \<pattern del>
                $res .= "\\$del";

} elsif( $nc =~ /([[.*\\n])/ ){
		## check for \-escaped magics and \n:
		## \[ \. \* \\ \n stay as they are
                $res .= '\\'.$nc;

} elsif( $nc eq '(' ){ ## \( => (
                $parlev++;
                $res .= '(';

} elsif( $nc eq ')' ){ ## \) => )
                $parlev--;
		$backref++;
                if( $parlev < 0 ){
                    Warn( "unmatched `\\)'", $fl );
                    return undef();
                }
                $res .= ')';

} elsif( $nc eq '{' ){ ## repetition factor \{<i>[,[<j>]]\}
                my $endpos = index( $pat, '\\}', $ic );
                if( $endpos < 0 ){
                    Warn( "unmatched `\\{'", $fl );
                    return undef();
                }
                my $rep = substr( $pat, $ic+1, $endpos-($ic+1) );
                $ic = $endpos + 1;

if( $res =~ /^\^?$/ ){
		    $res .= "\\{$rep\}";
                } elsif( $rep =~ /^(\d+)(,?)(\d*)?$/ ){
                    my $min = $1;
                    my $com = $2 || '';
                    my $max = $3;
                    if( length( $max ) ){
                        if( $max < $min ){
                            Warn( "maximum less than minimum in `\\{$rep\\}'",
				  $fl );
                            return undef();
                        }
                    } else {
                        $max = '';
                    }
		    # simplify some
		    if( $min == 0 && $max eq '1' ){
			$res .= '?';
		    } elsif( $min == 1 && "$com$max" eq ',' ){
			$res .= '+';
		    } elsif( $min == 0 && "$com$max" eq ',' ){
			$res .= '*';
		    } else {
			$res .= "{$min$com$max}";
		    }
                } else {
                    Warn( "invalid repeat clause `\\{$rep\\}'", $fl );
                    return undef();
                }

} elsif( $nc =~ /^[1-9]$/ ){
		## \1 .. \9 => \1 .. \9, but check for a following digit
		if( $nc > $backref ){
                    Warn( "invalid backreference ($nc)", $fl );
                    return undef();
		}
                $res .= "\\$nc";
		if( peek($pat,$ic) =~ /[0-9]/ ){
		    $res .= '(?:)';
		}

} elsif( $useEXTBRE && ( $nc =~ /[$useEXTBRE]/ ) ){
		## extensions - at most <>wWyB - not in POSIX
                if(      $nc eq '<' ){ ## \< => \b(?=\w), be precise
                    $res .= '\\b(?<=\\W)';
                } elsif( $nc eq '>' ){ ## \> => \b(?=\W), be precise
                    $res .= '\\b(?=\\W)';
                } elsif( $nc eq 'y' ){ ## \y => \b
                    $res .= '\\b';
                } else {               ## \B, \w, \W remain the same
                    $res .= "\\$nc";
                } 
	    } elsif( $nc eq $led ){
		## \<closing bracketing-delimiter> - keep '\'
		$res .= "\\$nc";

} else { ## \ <char> => <char> ("as if `\' were not present")
                $res .= $nc;
            }

} elsif( $c eq '.' ){ ## . => .
            $res .= $c;

} elsif( $c eq '*' ){ ## * => * but \* if there's nothing preceding it
	    if( $res =~ /^\^?$/ ){
                $res .= '\\*';
            } elsif( substr( $res, -1, 1 ) ne '*' ){
		$res .= $c;
	    }

} elsif( $c eq '[' ){
	    ## parse []: [^...] [^]...] [-...]
	    my $add = '[';
	    if( peek($pat,$ic) eq '^' ){
		$ic++;
		$add .= '^';
	    }
	    my $nc = peek($pat,$ic);
  	    if( $nc eq ']' || $nc eq '-' ){
		$add .= $nc;
                $ic++;
	    }
	    # check that [ is not trailing
	    if( $ic >= length( $pat ) - 1 ){
		Warn( "unmatched `['", $fl );
		return undef();
	    }
	    # look for [:...:] and x-y
	    my $rstr = substr( $pat, $ic+1 );
	    if( $rstr =~ /^((?:\[:$\w+|[><]$:\]|[^]-](?:-[^]])?)*)/ ){
 	        my $cnt = $1;
		$ic += length( $cnt );
		$cnt =~ s/([\\\$])/\\$1/g; # `\', `$' are magic in Perl []
		# try some simplifications
 	        my $red = $cnt;
		if( $red =~ s/0-9// ){
		    $cnt = $red.'\d';
		    if( $red =~ s/A-Z// && $red =~ s/a-z// && $red =~ s/_// ){
			$cnt = $red.'\w';
                    }
		}
		$add .= $cnt;

# POSIX 1003.2 has this (optional) for begin/end word
		$add = '\\b(?=\\W)'  if $add eq '[[:<:]]';
		$add = '\\b(?<=\\W)' if $add eq '[[:>:]]';

}

## may have a trailing `-' before `]'
	    if( $ic < length($pat) - 1 &&
                substr( $pat, $ic+1 ) =~ /^(-?])/ ){
		$ic += length( $1 );
		$add .= $1;
		# another simplification
		$add =~ s/^\[(\^?)(\\[dw])]$/ $1 eq '^' ? uc($2) : $2 /e;
		$res .= $add;
	    } else {
		Warn( "unmatched `['", $fl );
		return undef();
	    }

} elsif( $c eq $led ){ ## unescaped <closing bracketing-delimiter>
            $res .= "\\$c";

} elsif( $c eq ']' ){ ## unmatched ] is not magic
            $res .= ']';

} elsif( $c =~ /[|+?{}()]/ ){ ## not magic in BRE, but in Perl: \-quote
            $res .= "\\$c";

} elsif( $c eq '^' ){ ## not magic unless 1st, but in Perl: \-quote
            $res .= length( $res ) ? '\\^' : '^';

} elsif( $c eq '$' ){ ## not magic unless last, but in Perl: \-quote
            $res .= $ic == length( $pat ) - 1 ? '$' : '\\$';

} else {
            $res .= $c;
        }
    }

if( $parlev ){
       Warn( "unmatched `\\('", $fl );
       return undef();
    }

# final cleanup: eliminate raw HTs
    $res =~ s/\t/\\t/g;
    return $del . $res . ( $led ? $led : $del );
}

#####
# sub2p - convert sed substitution to Perl substitution
#
sub sub2p($$$){
    my( $del, $subst, $fl ) = @_;
    my $led = $del;
    $led =~ tr/{([</})]>/;
    $led = '' if $led eq $del;

$subst = substr( $subst, 1, length($subst) - 2 );
    my $res = '';
 
    for( my $ic = 0; $ic < length( $subst ); $ic++ ){
        my $c = substr( $subst, $ic, 1 );
        if( $c eq '\\' ){
	    ### backslash escapes
            my $nc = peek($subst,$ic);
            if( $nc eq '' ){
                Warn( "`\\' cannot be last in substitution", $fl );
                return undef();
            }
	    $ic++;
	    if( $nc =~ /[\\$del$led]/ ){ ## \ and delimiter
		$res .= '\\' . $nc;
            } elsif( $nc =~ /[1-9]/ ){ ## \1 - \9 => ${1} - ${9}
                $res .= '${' . $nc . '}';
	    } else { ## everything else (includes &): omit \
		$res .= $nc;
	    }
        } elsif( $c eq '&' ){ ## & => $&
            $res .= '$&';
	} elsif( $c =~ /[\$\@$led]/ ){ ## magic in Perl's substitution string
	    $res .= '\\' . $c;
        } else {
	    $res .= $c;
	}
    }

# final cleanup: eliminate raw HTs
    $res =~ s/\t/\\t/g;
    return ( $led ? $del : $led ) . $res . ( $led ? $led : $del );
}

sub Parse(){
    my $error = 0;
    my( $pdef, $pfil, $plin );
    for( my $icom = 0; $icom < @Commands; $icom++ ){
	my $cmd = $Commands[$icom];
	print "Parse:$cmd:\n" if $useDEBUG;
	$cmd =~ s/^\s+//;
	next unless length( $cmd );
	my $scom = $icom;
	if( exists( $Defined{$icom} ) ){
	    $pdef = $Defined{$icom};
	    if( $pdef =~ /^ #(\d+)/ ){
		$pfil = 'expression #';
		$plin = $1;
	    } else {
		$pfil = "$pdef l.";
		$plin = 1;
            }
        } else {
	    $plin++;
        }
        my $fl = "$pfil$plin";

# insert command as comment in gnerated code
	#
	$Code .= "# $cmd\n" if $doGenerate;

# The Address(es)
	#
	my( $negated, $naddr, $addr1, $addr2 );
	$naddr = 0;
	if(      $cmd =~ s/^(\d+)\s*// ){
	    $addr1 = "$1"; $naddr++;
	} elsif( $cmd =~ s/^\$\s*// ){
	    $addr1 = 'eofARGV()'; $naddr++;
	} elsif( $cmd =~ s{^(/)}{} || $cmd =~ s{^\\(.)}{} ){
	    my $del = $1;
	    my $regex = stripRegex( $del, \$cmd );
	    if( defined( $regex ) ){
		$addr1 = 'm '.bre2p( $del, $regex, $fl ).'s';
		$naddr++;
	    } else {
		Warn( "malformed regex, 1st address", $fl );
		$error++;
		next;
	    }
        }
        if( defined( $addr1 ) && $cmd =~ s/,\s*// ){
 	    if(      $cmd =~ s/^(\d+)\s*// ){
	        $addr2 = "$1"; $naddr++;
	    } elsif( $cmd =~ s/^\$\s*// ){
	        $addr2 = 'eofARGV()'; $naddr++;
	    } elsif( $cmd =~ s{^(/)}{} || $cmd =~ s{^\\(.)}{} ){
		my $del = $1;
	        my $regex = stripRegex( $del, \$cmd );
		if( defined( $regex ) ){
		    $addr2 = 'm '. bre2p( $del, $regex, $fl ).'s';
		    $naddr++;
		} else {
		    Warn( "malformed regex, 2nd address", $fl );
		    $error++;
		    next;
		}
            } else {
		Warn( "invalid address after `,'", $fl );
		$error++;
		next;
            }
        }

# address modifier `!'
        #
        $negated = $cmd =~ s/^!\s*//;
	if( defined( $addr1 ) ){
	    print "Parse: addr1=$addr1" if $useDEBUG;
	    if( defined( $addr2 ) ){
		print ", addr2=$addr2 " if $useDEBUG;
		# both numeric and addr1 > addr2 => eliminate addr2
		undef( $addr2 ) if $addr1 =~ /^\d+$/ &&
                                   $addr2 =~ /^\d+$/ && $addr1 > $addr2;
	    }
	}
	print 'negated' if $useDEBUG && $negated;
	print " command:$cmd\n" if $useDEBUG;

# The Command
	#
        if( $cmd !~ s/^([:#={}abcdDgGhHilnNpPqrstwxy])\s*// ){
	    my $h = substr( $cmd, 0, 1 );
 	    Warn( "unknown command `$h'", $fl );
	    $error++;
	    next;
	}
        my $key = $1;

my $tabref = $ComTab{$key};
	$GenKey{$key} = 1;
	if( $naddr > $tabref->[0] ){
	    Warn( "excess address(es)", $fl );
	    $error++;
	    next;
	}

my $arg = '';
	if(      $tabref->[1] eq 'str' ){
	    # take remainder - don't care if it is empty
	    $arg = $cmd;
            $cmd = '';

} elsif( $tabref->[1] eq 'txt' ){
	    # multi-line text
	    my $goon = $cmd =~ /(.*)\\$/;
	    if( length( $1 ) ){
		Warn( "extra characters after command ($cmd)", $fl );
		$error++;
	    }
	    while( $goon ){
		$icom++;
		if( $icom > $#Commands ){
		    Warn( "unexpected end of script", $fl );
		    $error++;
		    last;
		}
		$cmd = $Commands[$icom];
		$Code .= "# $cmd\n" if $doGenerate;
		$goon = $cmd =~ s/\\$//;
		$cmd =~ s/\\(.)/$1/g;
		$arg .= "\n" if length( $arg );
		$arg .= $cmd;
	    }
	    $arg .= "\n" if length( $arg );
	    $cmd = '';

} elsif( $tabref->[1] eq 'sub' ){
	    # s///
	    if( ! length( $cmd ) ){
		Warn( "`s' command requires argument", $fl );
		$error++;
		next;
	    }
	    if( $cmd =~ s{^([^\\\n])}{} ){
		my $del = $1;
		my $regex = stripRegex( $del, \$cmd, "s" );
		if( ! defined( $regex ) ){
		    Warn( "malformed regular expression", $fl );
		    $error++;
		    next;
		}
		$regex = bre2p( $del, $regex, $fl );

# a trailing \ indicates embedded NL (in replacement string)
		while( $cmd =~ s/(?<!\\)\\$/\n/ ){
		    $icom++;
		    if( $icom > $#Commands ){
			Warn( "unexpected end of script", $fl );
			$error++;
			last;
		    }
		    $cmd .= $Commands[$icom];
	            $Code .= "# $Commands[$icom]\n" if $doGenerate;
		}

my $subst = stripRegex( $del, \$cmd );
		if( ! defined( $regex ) ){
		    Warn( "malformed substitution expression", $fl );
		    $error++;
		    next;
		}
		$subst = sub2p( $del, $subst, $fl );

# parse s/// modifier: g|p|0-9|w <file>
		my( $global, $nmatch, $print, $write ) =
		  ( '',      '',      0,      undef );
		while( $cmd =~ s/^([gp0-9])// ){
		    $1 eq 'g' ? ( $global = 'g' ) :
  		    $1 eq 'p' ? ( $print  = $1  ) : ( $nmatch .= $1 );
                }
		$write = $1 if $cmd =~ s/w\s*(.*)$//;
  	        ### $nmatch =~ s/^(\d)\1*$/$1/; ### may be dangerous?
		if( $global && length( $nmatch ) || length( $nmatch ) > 1 ){
		    Warn( "conflicting flags `$global$nmatch'", $fl );
		    $error++;
		    next;
		}

$arg = makes( $regex, $subst,
			      $write, $global, $print, $nmatch, $fl );
		if( ! defined( $arg ) ){
		    $error++;
		    next;
		}

} else {
		Warn( "improper delimiter in s command", $fl );
		$error++;
		next;
            }

} elsif( $tabref->[1] eq 'tra' ){
	    # y///
	    # a trailing \ indicates embedded newline
	    while( $cmd =~ s/(?<!\\)\\$/\n/ ){
		$icom++;
		if( $icom > $#Commands ){
		    Warn( "unexpected end of script", $fl );
		    $error++;
		    last;
		}
		$cmd .= $Commands[$icom];
                $Code .= "# $Commands[$icom]\n" if $doGenerate;
	    }
	    if( ! length( $cmd ) ){
		Warn( "`y' command requires argument", $fl );
		$error++;
		next;
	    }
	    my $d = substr( $cmd, 0, 1 ); $cmd = substr( $cmd, 1 );
	    if( $d eq '\\' ){
		Warn( "`\\' not valid as delimiter in `y' command", $fl );
		$error++;
		next;
	    }
	    my $fr = stripTrans( $d, \$cmd );
	    if( ! defined( $fr ) || ! length( $cmd ) ){
		Warn( "malformed `y' command argument", $fl );
		$error++;
		next;
	    }
	    my $to = stripTrans( $d, \$cmd );
	    if( ! defined( $to ) ){
		Warn( "malformed `y' command argument", $fl );
		$error++;
		next;
	    }
	    if( length($fr) != length($to) ){
		Warn( "string lengths in `y' command differ", $fl );
		$error++;
		next;
	    }
	    if( ! defined( $arg = makey( $fr, $to, $fl ) ) ){
		$error++;
		next;
	    }

}

# $cmd must be now empty - exception is {
	if( $cmd !~ /^\s*$/ ){
	    if( $key eq '{' ){
		# dirty hack to process command on '{' line
		$Commands[$icom--] = $cmd;
	    } else {
		Warn( "extra characters after command ($cmd)", $fl );
		$error++;
		next;
	    }
	}

# Make Code
        #
	if( &{$tabref->[2]}( $addr1, $addr2, $negated,
                             $tabref->[3], $arg, $fl ) ){
	    $error++;
	}
    }

while( @BlockStack ){
	my $bl = pop( @BlockStack );
	Warn( "start of unterminated `{'", $bl );
        $error++;
    }

for my $lab ( keys( %Label ) ){
	if( ! exists( $Label{$lab}{defined} ) ){
	    for my $used ( @{$Label{$lab}{used}} ){
 	        Warn( "undefined label `$lab'", $used );
	        $error++;
	    }
	}
    }

exit( 1 ) if $error;
}

##############
#### MAIN ####
##############

sub usage(){
    print STDERR "Usage: sed [-an] command [file...]\n";
    print STDERR "           [-an] [-e command] [-f script-file] [file...]\n";
}

###################
# Here we go again...
#
my $expr = 0;
while( @ARGV && $ARGV[0] =~ /^-(.)(.*)$/ ){
    my $opt = $1;
    my $arg = $2;
    shift( @ARGV );
    if(      $opt eq 'e' ){
        if( length( $arg ) ){
	    push( @Commands, split( "\n", $arg ) );
        } elsif( @ARGV ){
	    push( @Commands, shift( @ARGV ) ); 
        } else {
            Warn( "option -e requires an argument" );
            usage();
            exit( 1 );
        }
	$expr++;
        $Defined{$#Commands} = " #$expr";
	next;
    }
    if( $opt eq 'f' ){
        my $path;
        if( length( $arg ) ){
	    $path = $arg;
        } elsif( @ARGV ){
	    $path = shift( @ARGV ); 
        } else {
            Warn( "option -f requires an argument" );
            usage();
            exit( 1 );
        }
	my $fst = $#Commands + 1;
        open( SCRIPT, "<$path" ) || die( "$0: $path: could not open ($!)\n" );
        my $cmd;
        while( defined( $cmd = <SCRIPT> ) ){
            chomp( $cmd );
            push( @Commands, $cmd );
        }
        close( SCRIPT );
	if( $#Commands >= $fst ){
	    $Defined{$fst} = "$path";
	}
	next;
    }
    if( $opt eq '-' && $arg eq '' ){
	last;
    }
    if( $opt eq 'h' || $opt eq '?' ){
        usage();
        exit( 0 );
    }
    if( $opt eq 'n' ){
	$doAutoPrint = 0;
    } elsif( $opt eq 'a' ){
	$doOpenWrite = 0;
    } else {
        Warn( "illegal option `$opt'" );
        usage();
        exit( 1 );
    }
    if( length( $arg ) ){
	unshift( @ARGV, "-$arg" );
    }
}

# A singleton command may be the 1st argument when there are no options.
#
if( @Commands == 0 ){
    if( @ARGV == 0 ){
        Warn( "no script command given" );
        usage();
        exit( 1 );
    }
    push( @Commands, split( "\n", shift( @ARGV ) ) );
    $Defined{0} = ' #1';
}

print STDERR "Files: @ARGV\n" if $useDEBUG;

# generate leading code
#
$Func = <<'[TheEnd]';

# openARGV: open 1st input file
#
sub openARGV(){
    unshift( @ARGV, '-' ) unless @ARGV;
    my $file = shift( @ARGV );
    open( ARG, "<$file" )
    || die( "$0: can't open $file for reading ($!)\n" );
    $isEOF = 0;
}

# getsARGV: Read another input line into argument (default: $_).
#           Move on to next input file, and reset EOF flag $isEOF.
sub getsARGV(;\$){
    my $argref = @_ ? shift() : \$_; 
    while( $isEOF || ! defined( $$argref = <ARG> ) ){
	close( ARG );
	return 0 unless @ARGV;
	my $file = shift( @ARGV );
	open( ARG, "<$file" )
	|| die( "$0: can't open $file for reading ($!)\n" );
	$isEOF = 0;
    }
    1;
}

# eofARGV: end-of-file test
#
sub eofARGV(){
    return @ARGV == 0 && ( $isEOF = eof( ARG ) );
}

# makeHandle: Generates another file handle for some file (given by its path)
#             to be written due to a w command or an s command's w flag.
sub makeHandle($){
    my( $path ) = @_;
    my $handle;
    if( ! exists( $wFiles{$path} ) || $wFiles{$path} eq '' ){
        $handle = $wFiles{$path} = gensym();
	if( $doOpenWrite ){
	    if( ! open( $handle, ">$path" ) ){
		die( "$0: can't open $path for writing: ($!)\n" );
	    }
	}
    } else {
        $handle = $wFiles{$path};
    }
    return $handle;
}

# printQ: Print queued output which is either a string or a reference
#         to a pathname.
sub printQ(){
    for my $q ( @Q ){
	if( ref( $q ) ){
            # flush open w files so that reading this file gets it all
	    if( exists( $wFiles{$$q} ) && $wFiles{$$q} ne '' ){
		open( $wFiles{$$q}, ">>$$q" );
	    }
            # copy file to stdout: slow, but safe
	    if( open( RF, "<$$q" ) ){
		while( defined( my $line = <RF> ) ){
		    print $line;
		}
		close( RF );
	    }
	} else {
	    print $q;
	}
    }
    undef( @Q );
}

[TheEnd]

# generate the sed loop
#
$Code .= <<'[TheEnd]';
sub openARGV();
sub getsARGV(;\$);
sub eofARGV();
sub printQ();

# Run: the sed loop reading input and applying the script
#
sub Run(){
    my( $h, $icnt, $s, $n );
    # hack (not unbreakable :-/) to avoid // matching an empty string
    my $z = "\000"; $z =~ /$z/;
    # Initialize.
    openARGV();
    $Hold    = '';
    $CondReg = 0;
    $doPrint = $doAutoPrint;
CYCLE:
    while( getsARGV() ){
	chomp();
	$CondReg = 0;   # cleared on t
BOS:;
[TheEnd]

# parse - avoid opening files when doing s2p
    #
    ( $svOpenWrite, $doOpenWrite ) = (  $doOpenWrite, $svOpenWrite )
      if $doGenerate;
    Parse();
    ( $svOpenWrite, $doOpenWrite ) = (  $doOpenWrite, $svOpenWrite )
      if $doGenerate;

# append trailing code
    #
    $Code .= <<'[TheEnd]';
EOS:    if( $doPrint ){
            print $_, "\n";
        } else {
	    $doPrint = $doAutoPrint;
	}
        printQ() if @Q;
    }

exit( 0 );
}
[TheEnd]

# append optional functions, prepend prototypes
#
my $Proto = "# prototypes\n";
if( $GenKey{'l'} ){
    $Proto .= "sub _l();\n";
    $Func .= <<'[TheEnd]';
# _l: l command processing
#
sub _l(){        
    my $h = $_;
    my $mcpl = 70;
    # transform non printing chars into escape notation
    $h =~ s/\\/\\\\/g;
    if( $h =~ /[^[:print:]]/ ){
	$h =~ s/\a/\\a/g;
	$h =~ s/\f/\\f/g;
	$h =~ s/\n/\\n/g;
	$h =~ s/\t/\\t/g;
	$h =~ s/\r/\\r/g;
	$h =~ s/\e/\\e/g;
        $h =~ s/([^[:print:]])/sprintf("\\%03o", ord($1))/ge;
    }
    # split into lines of length $mcpl
    while( length( $h ) > $mcpl ){
	my $l = substr( $h, 0, $mcpl-1 );
	$h = substr( $h, $mcpl );
	# remove incomplete \-escape from end of line
	if( $l =~ s/(?<!\\)(\\[0-7]{0,2})$// ){
	    $h = $1 . $h;
	}
	print $l, "\\\n";
    }
    print "$h\$\n";
}

[TheEnd]
}

if( $GenKey{'r'} ){
    $Proto .= "sub _r(\$);\n";
    $Func .= <<'[TheEnd]';
# _r: r command processing: Save a reference to the pathname.
#
sub _r($){
    my $path = shift();
    push( @Q, \$path );
}

[TheEnd]
}

if( $GenKey{'t'} ){
    $Proto .= "sub _t();\n";
    $Func .= <<'[TheEnd]';
# _t: t command - condition register test/reset
#
sub _t(){
    my $res = $CondReg;
    $CondReg = 0;
    $res;
}

[TheEnd]
}

if( $GenKey{'w'} ){
    $Proto .= "sub _w(\$);\n";
    $Func .= <<'[TheEnd]';
# _w: w command and s command's w flag - write to file 
#
sub _w($){
    my $path   = shift();
    my $handle = $wFiles{$path};
    if( ! $doOpenWrite && ! defined( fileno( $handle ) ) ){
	open( $handle, ">$path" )
	|| die( "$0: $path: cannot open ($!)\n" );
    }
    print $handle $_, "\n";
}

[TheEnd]
}

$Code = $Proto . $Code;

# magic "#n" - same as -n option
#
$doAutoPrint = 0 if substr( $Commands[0], 0, 2 ) eq '#n';

# eval code - check for errors
#
print "Code:\n$Code$Func" if $useDEBUG;
eval $Code . $Func;
if( $@ ){
    print "Code:\n$Code$Func";
    die( "$0: internal error - generated incorrect Perl code: $@\n" );
}

if( $doGenerate ){

# write full Perl program
    #
 
    # bang line, declarations, prototypes
    print <<TheEnd;
#!$perlpath -w
eval 'exec $perlpath -S \$0 \${1+"\$@"}'
  if 0;
\$0 =~ s/^.*?(\\w+)\[\\.\\w+\]*\$/\$1/;

use strict;
use Symbol;
use vars qw{ \$isEOF \$Hold \%wFiles \@Q \$CondReg
	     \$doAutoPrint \$doOpenWrite \$doPrint };
\$doAutoPrint = $doAutoPrint;
\$doOpenWrite = $doOpenWrite;
TheEnd

my $wf = "'" . join( "', '",  keys( %wFiles ) ) . "'";
    if( $wf ne "''" ){
	print <<TheEnd;
sub makeHandle(\$);
for my \$p ( $wf ){
   exit( 1 ) unless makeHandle( \$p );
}
TheEnd
   }

print $Code;
   print "Run();\n";
   print $Func;
   exit( 0 );

} else {

# execute: make handles (and optionally open) all w files; run!
    for my $p ( keys( %wFiles ) ){
        exit( 1 ) unless makeHandle( $p );
    }
    Run();
}

=head1 ENVIRONMENT

The environment variable C<PSEDEXTBRE> may be set to extend BREs.
See L<"Additional Atoms">.

=head1 DIAGNOSTICS

=over 4

=item ambiguous translation for character `%s' in `y' command

The indicated character appears twice, with different translations.

=item `[' cannot be last in pattern

A `[' in a BRE indicates the beginning of a I<bracket expression>.

=item `\' cannot be last in pattern

A `\' in a BRE is used to make the subsequent character literal.

=item `\' cannot be last in substitution

A `\' in a subsitution string is used to make the subsequent character literal.

=item conflicting flags `%s'

In an B<s> command, either the `g' flag and an n-th occurrence flag, or
multiple n-th occurrence flags are specified. Note that only the digits
`1' through `9' are permitted.

=item duplicate label %s (first defined at %s)

=item excess address(es)

The command has more than the permitted number of addresses.

=item extra characters after command (%s)

=item illegal option `%s'

=item improper delimiter in s command

The BRE and substitution may not be delimited with `\' or newline.

=item invalid address after `,'

=item invalid backreference (%s)

The specified backreference number exceeds the number of backreferences
in the BRE.

=item invalid repeat clause `\{%s\}'

The repeat clause does not contain a valid integer value, or pair of
values.

=item malformed regex, 1st address

=item malformed regex, 2nd address

=item malformed regular expression

=item malformed substitution expression

=item malformed `y' command argument

The first or second string of a B<y> command  is syntactically incorrect.

=item maximum less than minimum in `\{%s\}'

=item no script command given

There must be at least one B<-e> or one B<-f> option specifying a
script or script file.

=item `\' not valid as delimiter in `y' command

=item option -e requires an argument

=item option -f requires an argument

=item `s' command requires argument

=item start of unterminated `{'

=item string lengths in `y' command differ

The translation table strings in a B<y> command must have equal lengths.

=item undefined label `%s'

=item unexpected `}'

A B<}> command without a preceding B<{> command was encountered.

=item unexpected end of script

The end of the script was reached although a text line after a
B<a>, B<c> or B<i> command indicated another line.

=item unknown command `%s'

=item unterminated `['

A BRE contains an unterminated bracket expression.

=item unterminated `\('

A BRE contains an unterminated backreference.

=item `\{' without closing `\}'

A BRE contains an unterminated bounds specification.

=item `\)' without preceding `\('

=item `y' command requires argument

=back

=head1 EXAMPLE

The basic material for the preceding section was generated by running
the sed script

#no autoprint
   s/^.*Warn( *"$[^"]*$".*$/\1/
   t process
   b
   :process
   s/$!/%s/g
   s/$[_[:alnum:]]\{1,\}/%s/g
   s/\\\\/\\/g
   s/^/=item /
   p

on the program's own text, and piping the output into C<sort -u>.

=head1 SED SCRIPT TRANSLATION

If this program is invoked with the name F<s2p> it will act as a
sed-to-Perl translator. After option processing (all other
arguments are ignored), a Perl program is printed on standard
output, which will process the input stream (as read from all
arguments) in the way defined by the sed script and the option setting
used for the translation.

=head1 SEE ALSO

perl(1), re_format(7)

=head1 BUGS

The B<l> command will show escape characters (ESC) as `C<\e>', but
a vertical tab (VT) in octal.

Trailing spaces are truncated from labels in B<:>, B<t> and B<b> commands.

The meaning of an empty regular expression (`C<//>'), as defined by B<sed>,
is "the last pattern used, at run time". This deviates from the Perl
interpretation, which will re-use the "last last successfully executed
regular expression". Since keeping track of pattern usage would create
terribly cluttered code, and differences would only appear in obscure
context (where other B<sed> implementations appear to deviate, too),
the Perl semantics was adopted. Note that common usage of this feature,
such as in C</abc/s//xyz/>, will work as expected.

Collating elements (of bracket expressions in BREs) are not implemented.

=head1 STANDARDS

This B<sed> implementation conforms to the IEEE Std1003.2-1992 ("POSIX.2")
definition of B<sed>, and is compatible with the I<OpenBSD>
implementation, except where otherwise noted (see L<"BUGS">).

=head1 AUTHOR

This Perl implementation of I<sed> was written by Wolfgang Laun,
I<Wolfgang.Laun@alcatel.at>.

=head1 COPYRIGHT and LICENSE

This program is free and open software. You may use, modify,
distribute, and sell this program (and any modified variants) in any
way you wish, provided you do not restrict others from doing the same.

=cut

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