+$fp = undef;
+$callback = undef;
+$keepdays = 10;
+$cleandays = 100;
+$dbgringlth = 500;
+
+our $no_stdout; # set if not running in a terminal
+our @dbgring;
+
+# Avoid generating "subroutine redefined" warnings with the following
+# hack (from CGI::Carp):
+if (!defined $DB::VERSION) {
+ local $^W=0;
+ eval qq( sub confess {
+ \$SIG{__DIE__} = 'DEFAULT';
+ DXDebug::dbgprintring() unless DXDebug::isdbg('chan');
+ DXDebug::dbgclearring();
+ DXDebug::dbg(\$@);
+ DXDebug::dbg(Carp::shortmess(\@_));
+ exit(-1);
+ }
+ sub croak {
+ \$SIG{__DIE__} = 'DEFAULT';
+ DXDebug::dbgprintring() unless DXDebug::isdbg('chan');
+ DXDebug::dbgclearring();
+ DXDebug::dbg(\$@);
+ DXDebug::dbg(Carp::longmess(\@_));
+ exit(-1);
+ }
+ sub carp { DXDebug::dbg(Carp::shortmess(\@_)); }
+ sub cluck { DXDebug::dbg(Carp::longmess(\@_)); }
+ );
+
+ CORE::die(Carp::shortmess($@)) if $@;
+}
+else {
+ eval qq( sub confess { die Carp::longmess(\@_); };
+ sub croak { die Carp::shortmess(\@_); };
+ sub cluck { warn Carp::longmess(\@_); };
+ sub carp { warn Carp::shortmess(\@_); };
+ );
+}
+
+
+my $_isdbg; # current dbg level we are processing
+
+sub dbg($)
+{
+ return unless $fp;
+ my $t = time;
+ for (@_) {
+ my $r = $_;
+ chomp $r;
+ my @l = split /\n/, $r;
+ for (@l) {
+ s/([\x00-\x08\x0B-\x1f\x7f-\xff])/uc sprintf("%%%02x",ord($1))/eg;
+ print "$_\n" if defined \*STDOUT && !$no_stdout;
+ my $str = "$t^$_";
+ &$callback($str) if $callback;
+ if ($dbgringlth) {
+ shift @dbgring while (@dbgring > $dbgringlth);
+ push @dbgring, $str;
+ }
+ $fp->writeunix($t, $str) unless $dbglevel{"nolog$_isdbg"};
+ }
+ }
+ $_isdbg = '';
+}
+
+sub dbginit
+{
+ $callback = shift;
+
+ # add sig{__DIE__} handling
+ unless (defined $DB::VERSION) {
+ $SIG{__WARN__} = sub {
+ if ($_[0] =~ /Deep\s+recursion/i) {
+ dbg($@);
+ dbg(Carp::longmess(@_));
+ CORE::die;
+ }
+ else {
+ dbg($@);
+ dbg(Carp::shortmess(@_));
+ }
+ };
+
+ $SIG{__DIE__} = sub { dbg($@); dbg(Carp::longmess(@_)); };
+
+ # switch off STDOUT printing if we are not talking to a TTY
+ unless ($^O =~ /^MS/ || $^O =~ /^OS-2/) {
+ unless (isatty(STDOUT->fileno)) {
+ ++$no_stdout;
+ }
+ }
+ }
+
+ $fp = DXLog::new('debug', 'dat', 'd');
+ dbgclearring();
+}
+
+sub dbgclose
+{
+ $SIG{__DIE__} = $SIG{__WARN__} = 'DEFAULT';
+ if ($fp) {
+ dbgprintring() if grep /nolog/, keys %dbglevel;
+ $fp->close();
+ }
+ dbgclearring();
+ undef $fp;
+}