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📄 addftinfo(22.94 KB)
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📄 dig(130.52 KB)
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📄 env(23.27 KB)
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📄 eqn(134.11 KB)
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📄 expand(27.3 KB)
📄 expr(95.4 KB)
📄 factor(43.65 KB)
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📄 file(15.31 KB)
📄 find(229.02 KB)
📄 find2perl(23.06 KB)
📄 flex(324.66 KB)
📄 flex++(324.66 KB)
📄 flock(10.67 KB)
📄 floppy(23.06 KB)
📄 fmt(29.55 KB)
📄 fold(27.37 KB)
📄 font2c(300 B)
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📄 g++(261.65 KB)
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📄 geoiplookup(14.71 KB)
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📄 geqn(134.11 KB)
📄 getconf(22.28 KB)
📄 getent(27.13 KB)
📄 getopt(11.76 KB)
📄 ghostscript(6.6 KB)
📄 gindxbib(27.17 KB)
📄 git(1.09 MB)
📄 git-receive-pack(1.09 MB)
📄 git-shell(446.8 KB)
📄 git-upload-archive(1.09 MB)
📄 git-upload-pack(456.86 KB)
📄 glookbib(32.54 KB)
📄 gm(4.74 KB)
📄 gmake(166.58 KB)
📄 gneqn(255 B)
📄 gnroff(2.34 KB)
📄 gpg(743.84 KB)
📄 gpg-agent(290.99 KB)
📄 gpg-error(18.14 KB)
📄 gpg-zip(3.23 KB)
📄 gpg2(743.84 KB)
📄 gpgsplit(47.4 KB)
📄 gpgv(328.59 KB)
📄 gpgv2(328.59 KB)
📄 gpic(208.61 KB)
📄 gprof(92.73 KB)
📄 grefer(119.36 KB)
📄 grn(63.88 KB)
📄 grodvi(79.49 KB)
📄 groff(63.89 KB)
📄 groffer(7.59 KB)
📄 grolbp(85.9 KB)
📄 grolj4(75.65 KB)
📄 grops(114.27 KB)
📄 grotty(75.49 KB)
📄 groups(23.84 KB)
📄 gs(6.6 KB)
📄 gsbj(337 B)
📄 gsdj(339 B)
📄 gsdj500(342 B)
📄 gslj(340 B)
📄 gslp(337 B)
📄 gsnd(264 B)
📄 gsoelim(22.96 KB)
📄 gtbl(95.88 KB)
📄 gtroff(346.55 KB)
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📄 gzip(63.17 KB)
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📄 h2xs(58.97 KB)
📄 head(31.76 KB)
📄 hexdump(21.07 KB)
📄 host(117.12 KB)
📄 hostid(21.54 KB)
📄 hpftodit(19.91 KB)
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📄 iconv(58.86 KB)
📄 id(27.45 KB)
📄 identify(5.83 KB)
📄 idn(31.73 KB)
📄 ifnames(3.95 KB)
📄 import(5.71 KB)
📄 indxbib(27.17 KB)
📄 infocmp(49.77 KB)
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📄 install(104.69 KB)
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📄 ionice(14.76 KB)
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📄 ipcs(19.26 KB)
📄 isosize(7.15 KB)
📄 ispell(988 B)
📄 isql(26.97 KB)
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📄 join(39.41 KB)
📄 kill(11.3 KB)
📄 ld(574.42 KB)
📄 ldd(5.2 KB)
📄 less(146.43 KB)
📄 lessecho(7.2 KB)
📄 lesskey(15.88 KB)
📄 lesspipe.sh(2.74 KB)
📄 lex(324.66 KB)
📄 libnetcfg(15.36 KB)
📄 libtool(276.69 KB)
📄 libtoolize(66.56 KB)
📄 lkbib(32.76 KB)
📄 locale(37.73 KB)
📄 localedef(319.22 KB)
📄 logger(11.34 KB)
📄 logname(21.63 KB)
📄 look(7.89 KB)
📄 lookbib(32.54 KB)
📄 lprsetup.sh(4.55 KB)
📄 lynx(1.33 MB)
📄 m4(203.63 KB)
📄 make(166.58 KB)
📄 mcookie(10.77 KB)
📄 md5sum(31.71 KB)
📄 mesg(6.59 KB)
📄 mkfifo(24.68 KB)
📄 mogrify(5.71 KB)
📄 montage(5.71 KB)
📄 msql2mysql(1.91 KB)
📄 my_print_defaults(3.12 MB)
📄 mysql(3.67 MB)
📄 mysql_config(6.85 KB)
📄 mysql_find_rows(3.7 KB)
📄 mysql_waitpid(3.12 MB)
📄 mysqlaccess(109.89 KB)
📄 mysqladmin(3.37 MB)
📄 mysqlbinlog(3.56 MB)
📄 mysqlcheck(3.36 MB)
📄 mysqldump(3.44 MB)
📄 mysqlimport(3.36 MB)
📄 mysqlshow(3.36 MB)
📄 namei(12.41 KB)
📄 nano(167.76 KB)
📄 neqn(255 B)
📄 nl(95.82 KB)
📄 nm(40.16 KB)
📄 nohup(25.57 KB)
📄 nproc(23.7 KB)
📄 nroff(2.34 KB)
📄 nslookup(117.3 KB)
📄 nsupdate(58.13 KB)
📄 objcopy(207.13 KB)
📄 objdump(274.1 KB)
📄 od(56.79 KB)
📄 odbc_config(6.65 KB)
📄 odbcinst(22.78 KB)
📄 openssl(513.28 KB)
📄 pango-querymodules-64(9.94 KB)
📄 pango-view(48.52 KB)
📄 passwd(1.02 KB)
📄 paste(24.95 KB)
📄 patch(115.34 KB)
📄 pathchk(23.2 KB)
📄 pdf2dsc(696 B)
📄 pdf2ps(901 B)
📄 pdfopt(547 B)
📄 perl(7.01 KB)
📄 perl5.10.1(7.01 KB)
📄 perlbug(43.68 KB)
📄 perldoc(224 B)
📄 perlivp(12.01 KB)
📄 perlml(4.38 KB)
📄 perlthanks(43.68 KB)
📄 pf2afm(495 B)
📄 pfbtopfa(511 B)
📄 pfbtops(6.62 KB)
📄 pgrep(15.77 KB)
📄 php(937 B)
📄 pic(208.61 KB)
📄 pic2graph(2.5 KB)
📄 piconv(7.17 KB)
📄 pinentry(2.54 KB)
📄 pinentry-curses(47.46 KB)
📄 pinky(28.91 KB)
📄 pkg-config(103.41 KB)
📄 pkill(15.77 KB)
📄 pl2pm(4.42 KB)
📄 pmap(11.85 KB)
📄 pod2html(2.28 KB)
📄 pod2latex(10.01 KB)
📄 pod2man(20.68 KB)
📄 pod2text(8.87 KB)
📄 pod2usage(3.26 KB)
📄 podchecker(3.61 KB)
📄 podselect(2.47 KB)
📄 post-grohtml(128.52 KB)
📄 pr(60.32 KB)
📄 pre-grohtml(68.98 KB)
📄 precat(5.52 KB)
📄 preunzip(5.52 KB)
📄 prezip(5.52 KB)
📄 prezip-bin(6.98 KB)
📄 printafm(386 B)
📄 printenv(23.18 KB)
📄 printf(45.26 KB)
📄 protoize(67.05 KB)
📄 prove(13.24 KB)
📄 ps2ascii(786 B)
📄 ps2epsi(2.71 KB)
📄 ps2pdf(315 B)
📄 ps2pdf12(260 B)
📄 ps2pdf13(260 B)
📄 ps2pdf14(260 B)
📄 ps2pdfwr(1.06 KB)
📄 ps2ps(634 B)
📄 ps2ps2(704 B)
📄 psed(52.08 KB)
📄 pstruct(35.74 KB)
📄 ptx(124.09 KB)
📄 pv.sh(1.39 KB)
📄 pwdx(6.59 KB)
📄 pydoc(78 B)
📄 python(4.75 KB)
📄 python2(4.75 KB)
📄 python2.6(4.75 KB)
📄 ranlib(55.3 KB)
📄 readelf(292.14 KB)
📄 readlink(35.51 KB)
📄 recode(39.23 KB)
📄 refer(119.36 KB)
📄 rename(6.59 KB)
📄 renice(7.15 KB)
📄 reset(17.48 KB)
📄 rev(6.63 KB)
📄 rnano(167.76 KB)
📄 rpcgen(90.82 KB)
📄 run-with-aspell(85 B)
📄 runcon(27.45 KB)
📄 rvim(2.18 MB)
📄 s2p(52.08 KB)
📄 scl(17.88 KB)
📄 scl_enabled(258 B)
📄 scl_source(1.83 KB)
📄 scp(66.06 KB)
📄 screen(374.12 KB)
📄 script(12.33 KB)
📄 sdiff(23.02 KB)
📄 selectorctl(7.78 KB)
📄 seq(39.34 KB)
📄 setsid(5.41 KB)
📄 setterm(20.3 KB)
📄 sftp(102.07 KB)
📄 sha1sum(35.43 KB)
📄 sha224sum(41.15 KB)
📄 sha256sum(41.15 KB)
📄 sha384sum(47.43 KB)
📄 sha512sum(47.43 KB)
📄 shred(47.75 KB)
📄 shuf(35.55 KB)
📄 size(27.38 KB)
📄 skill(14.75 KB)
📄 slabtop(12.59 KB)
📄 slogin(440.16 KB)
📄 snice(14.75 KB)
📄 soelim(22.96 KB)
📄 spell(122 B)
📄 splain(17.04 KB)
📄 split(51.59 KB)
📄 sprof(22.56 KB)
📄 sqlite3(51.45 KB)
📄 ssh(440.16 KB)
📄 ssh-add(155.2 KB)
📄 ssh-agent(138.07 KB)
📄 ssh-copy-id(1.39 KB)
📄 ssh-keygen(195.2 KB)
📄 ssh-keyscan(247.8 KB)
📄 stat(45.07 KB)
📄 stdbuf(59.49 KB)
📄 strace(423.4 KB)
📄 stream(5.71 KB)
📄 strings(27.38 KB)
📄 strip(207.13 KB)
📄 sum(31.34 KB)
📄 tabs(10.93 KB)
📄 tac(91.52 KB)
📄 tail(56.34 KB)
📄 tailf(8.32 KB)
📄 tbl(95.88 KB)
📄 tclsh(5.1 KB)
📄 tclsh8.5(5.1 KB)
📄 tee(23.62 KB)
📄 test(29.54 KB)
📄 tfmtodit(23.01 KB)
📄 tic(48.66 KB)
📄 time(13.8 KB)
📄 timeout(45.63 KB)
📄 tload(7.64 KB)
📄 tmpwatch(17.38 KB)
📄 toe(11.13 KB)
📄 top(60.98 KB)
📄 tput(11.23 KB)
📄 tr(36.73 KB)
📄 troff(346.55 KB)
📄 truncate(47.48 KB)
📄 tset(17.48 KB)
📄 tsort(31.23 KB)
📄 tty(21.41 KB)
📄 tzselect(6.96 KB)
📄 uapi(1.02 KB)
📄 ul(13.1 KB)
📄 unexpand(27.4 KB)
📄 uniq(35.62 KB)
📄 unix-lpr.sh(4.11 KB)
📄 unprotoize(56.16 KB)
📄 unzip(163.23 KB)
📄 unzipsfx(75.16 KB)
📄 uptime(4.73 KB)
📄 users(23.54 KB)
📄 utmpdump(10.68 KB)
📄 vdir(106.65 KB)
📄 vim(2.18 MB)
📄 vimdiff(2.18 MB)
📄 vimtutor(2.04 KB)
📄 vmstat(19.84 KB)
📄 watch(12.28 KB)
📄 wc(31.85 KB)
📄 wftopfa(284 B)
📄 wget(349.02 KB)
📄 whereis(11.19 KB)
📄 which(20.28 KB)
📄 who(43.96 KB)
📄 whoami(23.18 KB)
📄 word-list-compress(6.56 KB)
📄 x86_64-redhat-linux-c++(261.65 KB)
📄 x86_64-redhat-linux-g++(261.65 KB)
📄 x86_64-redhat-linux-gcc(258.27 KB)
📄 xargs(42.99 KB)
📄 xmlcatalog(14.8 KB)
📄 xmllint(57.38 KB)
📄 xmlwf(21.89 KB)
📄 xsltproc(22.98 KB)
📄 xsubpp(4.96 KB)
📄 xxd(14.8 KB)
📄 yes(21.6 KB)
📄 zcmp(67 B)
📄 zdiff(4.34 KB)
📄 zegrep(62 B)
📄 zfgrep(62 B)
📄 zforce(1.98 KB)
📄 zgrep(4.86 KB)
📄 zip(207.08 KB)
📄 zipcloak(104.59 KB)
📄 zipgrep(2.88 KB)
📄 zipinfo(163.23 KB)
📄 zipnote(96.27 KB)
📄 zipsplit(100.27 KB)
📄 zless(1.69 KB)
📄 zmore(2.54 KB)
📄 znew(5.12 KB)
📄 zsoelim(22.96 KB)

Editing: splain

#!/usr/bin/perl
    eval 'exec /usr/bin/perl -S $0 ${1+"$@"}'
	if $running_under_some_shell;

=head1 NAME

diagnostics, splain - produce verbose warning diagnostics

=head1 SYNOPSIS

Using the C<diagnostics> pragma:

use diagnostics;
    use diagnostics -verbose;

enable  diagnostics;
    disable diagnostics;

Using the C<splain> standalone filter program:

perl program 2>diag.out
    splain [-v] [-p] diag.out

Using diagnostics to get stack traces from a misbehaving script:

perl -Mdiagnostics=-traceonly my_script.pl

=head1 DESCRIPTION

=head2 The C<diagnostics> Pragma

This module extends the terse diagnostics normally emitted by both the
perl compiler and the perl interpreter (from running perl with a -w 
switch or C<use warnings>), augmenting them with the more
explicative and endearing descriptions found in L<perldiag>.  Like the
other pragmata, it affects the compilation phase of your program rather
than merely the execution phase.

To use in your program as a pragma, merely invoke

use diagnostics;

at the start (or near the start) of your program.  (Note 
that this I<does> enable perl's B<-w> flag.)  Your whole
compilation will then be subject(ed :-) to the enhanced diagnostics.
These still go out B<STDERR>.

Due to the interaction between runtime and compiletime issues,
and because it's probably not a very good idea anyway,
you may not use C<no diagnostics> to turn them off at compiletime.
However, you may control their behaviour at runtime using the 
disable() and enable() methods to turn them off and on respectively.

The B<-verbose> flag first prints out the L<perldiag> introduction before
any other diagnostics.  The $diagnostics::PRETTY variable can generate nicer
escape sequences for pagers.

Warnings dispatched from perl itself (or more accurately, those that match
descriptions found in L<perldiag>) are only displayed once (no duplicate
descriptions).  User code generated warnings a la warn() are unaffected,
allowing duplicate user messages to be displayed.

This module also adds a stack trace to the error message when perl dies.
This is useful for pinpointing what caused the death. The B<-traceonly> (or
just B<-t>) flag turns off the explanations of warning messages leaving just
the stack traces. So if your script is dieing, run it again with

perl -Mdiagnostics=-traceonly my_bad_script

to see the call stack at the time of death. By supplying the B<-warntrace>
(or just B<-w>) flag, any warnings emitted will also come with a stack
trace.

=head2 The I<splain> Program

While apparently a whole nuther program, I<splain> is actually nothing
more than a link to the (executable) F<diagnostics.pm> module, as well as
a link to the F<diagnostics.pod> documentation.  The B<-v> flag is like
the C<use diagnostics -verbose> directive.
The B<-p> flag is like the
$diagnostics::PRETTY variable.  Since you're post-processing with 
I<splain>, there's no sense in being able to enable() or disable() processing.

Output from I<splain> is directed to B<STDOUT>, unlike the pragma.

=head1 EXAMPLES

The following file is certain to trigger a few errors at both
runtime and compiletime:

use diagnostics;
    print NOWHERE "nothing\n";
    print STDERR "\n\tThis message should be unadorned.\n";
    warn "\tThis is a user warning";
    print "\nDIAGNOSTIC TESTER: Please enter a <CR> here: ";
    my $a, $b = scalar <STDIN>;
    print "\n";
    print $x/$y;

If you prefer to run your program first and look at its problem
afterwards, do this:

perl -w test.pl 2>test.out
    ./splain < test.out

Note that this is not in general possible in shells of more dubious heritage, 
as the theoretical

(perl -w test.pl >/dev/tty) >& test.out
    ./splain < test.out

Because you just moved the existing B<stdout> to somewhere else.

If you don't want to modify your source code, but still have on-the-fly
warnings, do this:

exec 3>&1; perl -w test.pl 2>&1 1>&3 3>&- | splain 1>&2 3>&-

Nifty, eh?

If you want to control warnings on the fly, do something like this.
Make sure you do the C<use> first, or you won't be able to get
at the enable() or disable() methods.

use diagnostics; # checks entire compilation phase 
	print "\ntime for 1st bogus diags: SQUAWKINGS\n";
	print BOGUS1 'nada';
	print "done with 1st bogus\n";

disable diagnostics; # only turns off runtime warnings
	print "\ntime for 2nd bogus: (squelched)\n";
	print BOGUS2 'nada';
	print "done with 2nd bogus\n";

enable diagnostics; # turns back on runtime warnings
	print "\ntime for 3rd bogus: SQUAWKINGS\n";
	print BOGUS3 'nada';
	print "done with 3rd bogus\n";

disable diagnostics;
	print "\ntime for 4th bogus: (squelched)\n";
	print BOGUS4 'nada';
	print "done with 4th bogus\n";

=head1 INTERNALS

Diagnostic messages derive from the F<perldiag.pod> file when available at
runtime.  Otherwise, they may be embedded in the file itself when the
splain package is built.   See the F<Makefile> for details.

If an extant $SIG{__WARN__} handler is discovered, it will continue
to be honored, but only after the diagnostics::splainthis() function 
(the module's $SIG{__WARN__} interceptor) has had its way with your
warnings.

There is a $diagnostics::DEBUG variable you may set if you're desperately
curious what sorts of things are being intercepted.

BEGIN { $diagnostics::DEBUG = 1 }

=head1 BUGS

Not being able to say "no diagnostics" is annoying, but may not be
insurmountable.

The C<-pretty> directive is called too late to affect matters.
You have to do this instead, and I<before> you load the module.

BEGIN { $diagnostics::PRETTY = 1 }

I could start up faster by delaying compilation until it should be
needed, but this gets a "panic: top_level" when using the pragma form
in Perl 5.001e.

While it's true that this documentation is somewhat subserious, if you use
a program named I<splain>, you should expect a bit of whimsy.

=head1 AUTHOR

Tom Christiansen <F<tchrist@mox.perl.com>>, 25 June 1995.

=cut

use strict;
use 5.009001;
use Carp;
$Carp::Internal{__PACKAGE__.""}++;

our $VERSION = 1.17;
our $DEBUG;
our $VERBOSE;
our $PRETTY;
our $TRACEONLY = 0;
our $WARNTRACE = 0;

use Config;
my($privlib, $archlib) = @Config{qw(privlibexp archlibexp)};
if ($^O eq 'VMS') {
    require VMS::Filespec;
    $privlib = VMS::Filespec::unixify($privlib);
    $archlib = VMS::Filespec::unixify($archlib);
}
my @trypod = (
	   "$archlib/pod/perldiag.pod",
	   "$privlib/pod/perldiag-$Config{version}.pod",
	   "$privlib/pod/perldiag.pod",
	   "$archlib/pods/perldiag.pod",
	   "$privlib/pods/perldiag-$Config{version}.pod",
	   "$privlib/pods/perldiag.pod",
	  );
# handy for development testing of new warnings etc
unshift @trypod, "./pod/perldiag.pod" if -e "pod/perldiag.pod";
(my $PODFILE) = ((grep { -e } @trypod), $trypod[$#trypod])[0];

if ($^O eq 'MacOS') {
    # just updir one from each lib dir, we'll find it ...
    ($PODFILE) = grep { -e } map { "$_:pod:perldiag.pod" } @INC;
}

$DEBUG ||= 0;
my $WHOAMI = ref bless [];  # nobody's business, prolly not even mine

local $| = 1;
my $_;

my $standalone;
my(%HTML_2_Troff, %HTML_2_Latin_1, %HTML_2_ASCII_7);

CONFIG: {
    our $opt_p = our $opt_d = our $opt_v = our $opt_f = '';

unless (caller) {
	$standalone++;
	require Getopt::Std;
	Getopt::Std::getopts('pdvf:')
	    or die "Usage: $0 [-v] [-p] [-f splainpod]";
	$PODFILE = $opt_f if $opt_f;
	$DEBUG = 2 if $opt_d;
	$VERBOSE = $opt_v;
	$PRETTY = $opt_p;
    }

if (open(POD_DIAG, $PODFILE)) {
	warn "Happy happy podfile from real $PODFILE\n" if $DEBUG;
	last CONFIG;
    }

if (caller) {
	INCPATH: {
	    for my $file ( (map { "$_/$WHOAMI.pm" } @INC), $0) {
		warn "Checking $file\n" if $DEBUG;
		if (open(POD_DIAG, $file)) {
		    while (<POD_DIAG>) {
			next unless
			    /^__END__\s*# wish diag dbase were more accessible/;
			print STDERR "podfile is $file\n" if $DEBUG;
			last INCPATH;
		    }
		}
	    } 
	}
    } else { 
	print STDERR "podfile is <DATA>\n" if $DEBUG;
	*POD_DIAG = *main::DATA;
    }
}
if (eof(POD_DIAG)) { 
    die "couldn't find diagnostic data in $PODFILE @INC $0";
}

%HTML_2_Troff = (
    'amp'	=>	'&',	#   ampersand
    'lt'	=>	'<',	#   left chevron, less-than
    'gt'	=>	'>',	#   right chevron, greater-than
    'quot'	=>	'"',	#   double quote

"Aacute"	=>	"A\\*'",	#   capital A, acute accent
    # etc

);

%HTML_2_Latin_1 = (
    'amp'	=>	'&',	#   ampersand
    'lt'	=>	'<',	#   left chevron, less-than
    'gt'	=>	'>',	#   right chevron, greater-than
    'quot'	=>	'"',	#   double quote

"Aacute"	=>	"\xC1"	#   capital A, acute accent

# etc
);

%HTML_2_ASCII_7 = (
    'amp'	=>	'&',	#   ampersand
    'lt'	=>	'<',	#   left chevron, less-than
    'gt'	=>	'>',	#   right chevron, greater-than
    'quot'	=>	'"',	#   double quote

"Aacute"	=>	"A"	#   capital A, acute accent
    # etc
);

our %HTML_Escapes;
*HTML_Escapes = do {
    if ($standalone) {
	$PRETTY ? \%HTML_2_Latin_1 : \%HTML_2_ASCII_7; 
    } else {
	\%HTML_2_Latin_1; 
    }
};

*THITHER = $standalone ? *STDOUT : *STDERR;

my %transfmt = (); 
my $transmo = <<EOFUNC;
sub transmo {
    #local \$^W = 0;  # recursive warnings we do NOT need!
    study;
EOFUNC

my %msg;
{
    print STDERR "FINISHING COMPILATION for $_\n" if $DEBUG;
    local $/ = '';
    my $header;
    my $for_item;
    while (<POD_DIAG>) {

unescape();
	if ($PRETTY) {
	    sub noop   { return $_[0] }  # spensive for a noop
	    sub bold   { my $str =$_[0];  $str =~ s/(.)/$1\b$1/g; return $str; } 
	    sub italic { my $str = $_[0]; $str =~ s/(.)/_\b$1/g;  return $str; } 
	    s/C<<< (.*?) >>>|C<< (.*?) >>|[BC]<(.*?)>/bold($+)/ges;
	    s/[LIF]<(.*?)>/italic($1)/ges;
	} else {
	    s/C<<< (.*?) >>>|C<< (.*?) >>|[BC]<(.*?)>/$+/gs;
	    s/[LIF]<(.*?)>/$1/gs;
	} 
	unless (/^=/) {
	    if (defined $header) { 
		if ( $header eq 'DESCRIPTION' && 
		    (   /Optional warnings are enabled/ 
		     || /Some of these messages are generic./
		    ) )
		{
		    next;
		}
		s/^/    /gm;
		$msg{$header} .= $_;
	 	undef $for_item;	
	    }
	    next;
	} 
	unless ( s/=item (.*?)\s*\z//) {

if ( s/=head1\sDESCRIPTION//) {
		$msg{$header = 'DESCRIPTION'} = '';
		undef $for_item;
	    }
	    elsif( s/^=for\s+diagnostics\s*\n(.*?)\s*\z// ) {
		$for_item = $1;
	    } 
	    next;
	}

if( $for_item ) { $header = $for_item; undef $for_item } 
	else {
	    $header = $1;
	    while( $header =~ /[;,]\z/ ) {
		<POD_DIAG> =~ /^\s*(.*?)\s*\z/;
		$header .= ' '.$1;
	    }
	}

# strip formatting directives from =item line
	$header =~ s/[A-Z]<(.*?)>/$1/g;

my @toks = split( /(%l?[dx]|%c|%(?:\.\d+)?s)/, $header );
	if (@toks > 1) {
            my $conlen = 0;
            for my $i (0..$#toks){
                if( $i % 2 ){
                    if(      $toks[$i] eq '%c' ){
                        $toks[$i] = '.';
                    } elsif( $toks[$i] eq '%d' ){
                        $toks[$i] = '\d+';
                    } elsif( $toks[$i] eq '%s' ){
                        $toks[$i] = $i == $#toks ? '.*' : '.*?';
                    } elsif( $toks[$i] =~ '%.(\d+)s' ){
                        $toks[$i] = ".{$1}";
                     } elsif( $toks[$i] =~ '^%l*x$' ){
                        $toks[$i] = '[\da-f]+';
                   }
                } elsif( length( $toks[$i] ) ){
                    $toks[$i] = quotemeta $toks[$i];
                    $conlen += length( $toks[$i] );
                }
            }  
            my $lhs = join( '', @toks );
	    $transfmt{$header}{pat} =
              "    s{^$lhs}\n     {\Q$header\E}s\n\t&& return 1;\n";
            $transfmt{$header}{len} = $conlen;
	} else {
            $transfmt{$header}{pat} =
	      "    m{^\Q$header\E} && return 1;\n";
            $transfmt{$header}{len} = length( $header );
	}

print STDERR "$WHOAMI: Duplicate entry: \"$header\"\n"
	    if $msg{$header};

$msg{$header} = '';
    }

close POD_DIAG unless *main::DATA eq *POD_DIAG;

die "No diagnostics?" unless %msg;

# Apply patterns in order of decreasing sum of lengths of fixed parts
    # Seems the best way of hitting the right one.
    for my $hdr ( sort { $transfmt{$b}{len} <=> $transfmt{$a}{len} }
                  keys %transfmt ){
        $transmo .= $transfmt{$hdr}{pat};
    }
    $transmo .= "    return 0;\n}\n";
    print STDERR $transmo if $DEBUG;
    eval $transmo;
    die $@ if $@;
}

if ($standalone) {
    if (!@ARGV and -t STDIN) { print STDERR "$0: Reading from STDIN\n" } 
    while (defined (my $error = <>)) {
	splainthis($error) || print THITHER $error;
    } 
    exit;
}

my $olddie;
my $oldwarn;

sub import {
    shift;
    $^W = 1; # yup, clobbered the global variable; 
	     # tough, if you want diags, you want diags.
    return if defined $SIG{__WARN__} && ($SIG{__WARN__} eq \&warn_trap);

for (@_) {

/^-d(ebug)?$/ 	   	&& do {
				    $DEBUG++;
				    next;
				   };

/^-v(erbose)?$/ 	&& do {
				    $VERBOSE++;
				    next;
				   };

/^-p(retty)?$/ 		&& do {
				    print STDERR "$0: I'm afraid it's too late for prettiness.\n";
				    $PRETTY++;
				    next;
			       };
	# matches trace and traceonly for legacy doc mixup reasons
	/^-t(race(only)?)?$/	&& do {
				    $TRACEONLY++;
				    next;
			       };
	/^-w(arntrace)?$/ 	&& do {
				    $WARNTRACE++;
				    next;
			       };

warn "Unknown flag: $_";
    }

$oldwarn = $SIG{__WARN__};
    $olddie = $SIG{__DIE__};
    $SIG{__WARN__} = \&warn_trap;
    $SIG{__DIE__} = \&death_trap;
}

sub enable { &import }

sub disable {
    shift;
    return unless $SIG{__WARN__} eq \&warn_trap;
    $SIG{__WARN__} = $oldwarn || '';
    $SIG{__DIE__} = $olddie || '';
}

sub warn_trap {
    my $warning = $_[0];
    if (caller eq $WHOAMI or !splainthis($warning)) {
	if ($WARNTRACE) {
	    print STDERR Carp::longmess($warning);
	} else {
	    print STDERR $warning;
	}
    } 
    goto &$oldwarn if defined $oldwarn and $oldwarn and $oldwarn ne \&warn_trap;
};

sub death_trap {
    my $exception = $_[0];

# See if we are coming from anywhere within an eval. If so we don't
    # want to explain the exception because it's going to get caught.
    my $in_eval = 0;
    my $i = 0;
    while (my $caller = (caller($i++))[3]) {
      if ($caller eq '(eval)') {
	$in_eval = 1;
	last;
      }
    }

splainthis($exception) unless $in_eval;
    if (caller eq $WHOAMI) { print STDERR "INTERNAL EXCEPTION: $exception"; } 
    &$olddie if defined $olddie and $olddie and $olddie ne \&death_trap;

return if $in_eval;

# We don't want to unset these if we're coming from an eval because
    # then we've turned off diagnostics.

# Switch off our die/warn handlers so we don't wind up in our own
    # traps.
    $SIG{__DIE__} = $SIG{__WARN__} = '';

# Have carp skip over death_trap() when showing the stack trace.
    local($Carp::CarpLevel) = 1;

confess "Uncaught exception from user code:\n\t$exception";
	# up we go; where we stop, nobody knows, but i think we die now
	# but i'm deeply afraid of the &$olddie guy reraising and us getting
	# into an indirect recursion loop
};

my %exact_duplicate;
my %old_diag;
my $count;
my $wantspace;
sub splainthis {
    return 0 if $TRACEONLY;
    $_ = shift;
    local $\;
    local $!;
    ### &finish_compilation unless %msg;
    s/\.?\n+$//;
    my $orig = $_;
    # return unless defined;

# get rid of the where-are-we-in-input part
    s/, <.*?> (?:line|chunk).*$//;

# Discard 1st " at <file> line <no>" and all text beyond
    # but be aware of messsages containing " at this-or-that"
    my $real = 0;
    my @secs = split( / at / );
    return unless @secs;
    $_ = $secs[0];
    for my $i ( 1..$#secs ){
        if( $secs[$i] =~ /.+? (?:line|chunk) \d+/ ){
            $real = 1;
            last;
        } else {
            $_ .= ' at ' . $secs[$i];
	}
    }
    
    # remove parenthesis occurring at the end of some messages 
    s/^$(.*)$$/$1/;

if ($exact_duplicate{$orig}++) {
	return &transmo;
    } else {
	return 0 unless &transmo;
    }

$orig = shorten($orig);
    if ($old_diag{$_}) {
	autodescribe();
	print THITHER "$orig (#$old_diag{$_})\n";
	$wantspace = 1;
    } else {
	autodescribe();
	$old_diag{$_} = ++$count;
	print THITHER "\n" if $wantspace;
	$wantspace = 0;
	print THITHER "$orig (#$old_diag{$_})\n";
	if ($msg{$_}) {
	    print THITHER $msg{$_};
	} else {
	    if (0 and $standalone) { 
		print THITHER "    **** Error #$old_diag{$_} ",
			($real ? "is" : "appears to be"),
			" an unknown diagnostic message.\n\n";
	    }
	    return 0;
	} 
    }
    return 1;
}

sub autodescribe {
    if ($VERBOSE and not $count) {
	print THITHER &{$PRETTY ? \&bold : \&noop}("DESCRIPTION OF DIAGNOSTICS"),
		"\n$msg{DESCRIPTION}\n";
    } 
}

sub unescape { 
    s {
            E<  
            ( [A-Za-z]+ )       
            >   
    } { 
         do {   
             exists $HTML_Escapes{$1}
                ? do { $HTML_Escapes{$1} }
                : do {
                    warn "Unknown escape: E<$1> in $_";
                    "E<$1>";
                } 
         } 
    }egx;
}

sub shorten {
    my $line = $_[0];
    if (length($line) > 79 and index($line, "\n") == -1) {
	my $space_place = rindex($line, ' ', 79);
	if ($space_place != -1) {
	    substr($line, $space_place, 1) = "\n\t";
	} 
    } 
    return $line;
}

1 unless $standalone;  # or it'll complain about itself
__END__ # wish diag dbase were more accessible

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