5 @@RXVT_NAME@@perl - rxvt-unicode's embedded perl interpreter
9 # create a file grab_test in $HOME:
12 warn "you selected ", $_[0]->selection;
16 # start a @@RXVT_NAME@@ using it:
18 @@RXVT_NAME@@ --perl-lib $HOME -pe grab_test
22 Everytime a terminal object gets created, scripts specified via the
23 C<perl> resource are loaded and associated with it.
25 Scripts are compiled in a 'use strict' and 'use utf8' environment, and
26 thus must be encoded as UTF-8.
28 Each script will only ever be loaded once, even in @@RXVT_NAME@@d, where
29 scripts will be shared (but not enabled) for all terminals.
31 =head2 Prepackaged Extensions
33 This section describes the extensiosn delivered with this version. You can
34 find them in F<@@RXVT_LIBDIR@@/urxvt/perl/>.
36 You can activate them like this:
38 @@RXVT_NAME@@ -pe <extensionname>
44 Intelligent selection. This extension tries to be more intelligent when
45 the user extends selections (double-click). Right now, it tries to select
46 urls and complete shell-quoted arguments, which is very convenient, too,
47 if your F<ls> supports C<--quoting-style=shell>.
49 It also offers the following bindable event:
55 Rot-13 the selection when activated. Used via keyboard trigger:
57 URxvt.keysym.C-M-r: perl:selection:rot13
63 Displays a digital clock using the built-in overlay.
65 =item example-refresh-hooks
67 Displays a very simple digital clock in the upper right corner of the
68 window. Illustrates overwriting the refresh callbacks to create your own
73 A not very useful example of filtering all text output to the terminal, by
74 underlining all urls that matches a certain regex (i.e. some urls :). It
75 is not very useful because urls that are output in multiple steps (e.g.
76 when typing them) do not get marked.
80 =head2 General API Considerations
82 All objects (such as terminals, time watchers etc.) are typical
83 reference-to-hash objects. The hash can be used to store anything you
84 like. All members starting with an underscore (such as C<_ptr> or
85 C<_hook>) are reserved for internal uses and B<MUST NOT> be accessed or
88 When objects are destroyed on the C++ side, the perl object hashes are
89 emptied, so its best to store related objects such as time watchers and
90 the like inside the terminal object so they get destroyed as soon as the
91 terminal is destroyed.
93 Argument names also often indicate the type of a parameter. Here are some
94 hints on what they mean:
100 Rxvt-unicodes special way of encoding text, where one "unicode" character
101 always represents one screen cell. See L<row_t> for a discussion of this format.
105 A perl text string, with an emphasis on I<text>. It can store all unicode
106 characters and is to be distinguished with text encoded in a specific
107 encoding (often locale-specific) and binary data.
111 Either binary data or - more common - a text string encoded in a
118 The following subroutines can be declared in loaded scripts, and will be
119 called whenever the relevant event happens.
121 The first argument passed to them is an object private to each terminal
122 and extension package. You can call all C<urxvt::term> methods on it, but
123 its not a real C<urxvt::term> object. Instead, the real C<urxvt::term>
124 object that is shared between all packages is stored in the C<term>
127 All of them must return a boolean value. If it is true, then the event
128 counts as being I<consumed>, and the invocation of other hooks is skipped,
129 and the relevant action might not be carried out by the C++ code.
131 When in doubt, return a false value (preferably C<()>).
137 Called after a new terminal object has been initialized, but before
138 windows are created or the command gets run.
142 Called after the screen is "reset" for any reason, such as resizing or
143 control sequences. Here is where you can react on changes to size-related
148 Called at the very end of initialisation of a new terminal, just before
149 returning to the mainloop.
151 =item on_sel_make $term, $eventtime
153 Called whenever a selection has been made by the user, but before the
154 selection text is copied, so changes to the beginning, end or type of the
155 selection will be honored.
157 Returning a true value aborts selection making by urxvt, in which case you
158 have to make a selection yourself by calling C<< $term->selection_grab >>.
160 =item on_sel_grab $term, $eventtime
162 Called whenever a selection has been copied, but before the selection is
163 requested from the server. The selection text can be queried and changed
164 by calling C<< $term->selection >>.
166 Returning a true value aborts selection grabbing. It will still be hilighted.
168 =item on_sel_extend $term
170 Called whenever the user tries to extend the selection (e.g. with a double
171 click) and is either supposed to return false (normal operation), or
172 should extend the selection itelf and return true to suppress the built-in
175 See the F<selection> example extension.
177 =item on_focus_in $term
179 Called whenever the window gets the keyboard focus, before urxvt does
182 =item on_focus_out $term
184 Called wheneever the window loses keyboard focus, before urxvt does focus
187 =item on_view_change $term, $offset
189 Called whenever the view offset changes, i..e the user or program
190 scrolls. Offset C<0> means display the normal terminal, positive values
191 show this many lines of scrollback.
193 =item on_scroll_back $term, $lines, $saved
195 Called whenever lines scroll out of the terminal area into the scrollback
196 buffer. C<$lines> is the number of lines scrolled out and may be larger
197 than the scroll back buffer or the terminal.
199 It is called before lines are scrolled out (so rows 0 .. min ($lines - 1,
200 $nrow - 1) represent the lines to be scrolled out). C<$saved> is the total
201 number of lines that will be in the scrollback buffer.
203 =item on_tty_activity $term *NYI*
205 Called whenever the program(s) running in the urxvt window send output.
207 =item on_osc_seq $term, $string
209 Called whenever the B<ESC ] 777 ; string ST> command sequence (OSC =
210 operating system command) is processed. Cursor position and other state
211 information is up-to-date when this happens. For interoperability, the
212 string should start with the extension name and a colon, to distinguish
213 it from commands for other extensions, and this might be enforced in the
216 Be careful not ever to trust (in a security sense) the data you receive,
217 as its source can not easily be controleld (e-mail content, messages from
218 other users on the same system etc.).
220 =item on_add_lines $term, $string
222 Called whenever text is about to be output, with the text as argument. You
223 can filter/change and output the text yourself by returning a true value
224 and calling C<< $term->scr_add_lines >> yourself. Please note that this
225 might be very slow, however, as your hook is called for B<all> text being
228 =item on_refresh_begin $term
230 Called just before the screen gets redrawn. Can be used for overlay
231 or similar effects by modify terminal contents in refresh_begin, and
232 restoring them in refresh_end. The built-in overlay and selection display
233 code is run after this hook, and takes precedence.
235 =item on_refresh_end $term
237 Called just after the screen gets redrawn. See C<on_refresh_begin>.
239 =item on_keyboard_command $term, $string
241 Called whenever the user presses a key combination that has a
242 C<perl:string> action bound to it (see description of the B<keysym>
243 resource in the @@RXVT_NAME@@(1) manpage).
247 =head2 Variables in the C<urxvt> Package
253 The current terminal. Whenever a callback/Hook is bein executed, this
254 variable stores the current C<urxvt::term> object.
258 =head2 Functions in the C<urxvt> Package
262 =item urxvt::fatal $errormessage
264 Fatally aborts execution with the given error message. Avoid at all
265 costs! The only time this is acceptable is when the terminal process
268 =item urxvt::warn $string
270 Calls C<rxvt_warn> with the given string which should not include a
271 newline. The module also overwrites the C<warn> builtin with a function
272 that calls this function.
274 Using this function has the advantage that its output ends up in the
275 correct place, e.g. on stderr of the connecting urxvtc client.
277 =item $time = urxvt::NOW
279 Returns the "current time" (as per the event loop).
285 Rendition bitsets contain information about colour, font, font styles and
286 similar information for each screen cell.
288 The following "macros" deal with changes in rendition sets. You should
289 never just create a bitset, you should always modify an existing one,
290 as they contain important information required for correct operation of
295 =item $rend = urxvt::DEFAULT_RSTYLE
297 Returns the default rendition, as used when the terminal is starting up or
298 being reset. Useful as a base to start when creating renditions.
300 =item $rend = urxvt::OVERLAY_RSTYLE
302 Return the rendition mask used for overlays by default.
304 =item $rendbit = urxvt::RS_Bold, RS_Italic, RS_Blink, RS_RVid, RS_Uline
306 Return the bit that enabled bold, italic, blink, reverse-video and
307 underline, respectively. To enable such a style, just logically OR it into
310 =item $foreground = urxvt::GET_BASEFG $rend
312 =item $background = urxvt::GET_BASEBG $rend
314 Return the foreground/background colour index, respectively.
316 =item $rend = urxvt::SET_FGCOLOR ($rend, $new_colour)
318 =item $rend = urxvt::SET_BGCOLOR ($rend, $new_colour)
320 Replace the foreground/background colour in the rendition mask with the
323 =item $value = urxvt::GET_CUSTOM ($rend)
325 Return the "custom" value: Every rendition has 5 bits for use by
326 extensions. They can be set and changed as you like and are initially
329 =item $rend = urxvt::SET_CUSTOM ($rend, $new_value)
331 Change the custom value.
349 # overwrite perl's warn
350 *CORE::GLOBAL::warn = sub {
351 my $msg = join "", @_;
353 unless $msg =~ /\n$/;
359 my $verbosity = $ENV{URXVT_PERL_VERBOSITY};
362 my ($level, $msg) = @_;
363 warn "$msg\n" if $level <= $verbosity;
366 # find on_xxx subs in the package and register them
368 sub register_package($) {
371 for my $htype (0.. $#HOOKNAME) {
372 my $name = $HOOKNAME[$htype];
374 my $ref = $pkg->can ("on_" . lc $name)
377 $TERM->{_hook}[$htype]{$pkg} = $ref;
378 $hook_count[$htype]++
379 or set_should_invoke $htype, 1;
383 my $script_pkg = "script0000";
386 # load a single script into its own package, once only
387 sub script_package($) {
390 $script_pkg{$path} ||= do {
391 my $pkg = "urxvt::" . ($script_pkg++);
393 verbose 3, "loading script '$path' into package '$pkg'";
395 open my $fh, "<:raw", $path
398 my $source = "package $pkg; use strict; use utf8;\n"
399 . "#line 1 \"$path\"\n{\n"
400 . (do { local $/; <$fh> })
403 eval $source or die "$path: $@";
409 our $retval; # return value for urxvt
411 # called by the rxvt core
416 if ($htype == 0) { # INIT
417 my @dirs = ((split /:/, $TERM->resource ("perl_lib")), "$LIBDIR/perl");
419 for my $ext (map { split /:/, $TERM->resource ("perl_ext_$_") } 1, 2) {
420 my @files = grep -f $_, map "$_/$ext", @dirs;
423 register_package script_package $files[0];
425 warn "perl extension '$ext' not found in perl library search path\n";
432 if (my $cb = $TERM->{_hook}[$htype]) {
433 verbose 10, "$HOOKNAME[$htype] (" . (join ", ", $TERM, @_) . ")"
438 while (my ($pkg, $cb) = each %$cb) {
440 $TERM->{_pkg}{$pkg} ||= do {
441 my $proxy = bless { }, urxvt::term::proxy::;
442 Scalar::Util::weaken ($proxy->{term} = $TERM);
450 if ($htype == 1) { # DESTROY
451 # remove hooks if unused
452 if (my $hook = $TERM->{_hook}) {
453 for my $htype (0..$#$hook) {
454 $hook_count[$htype] -= scalar keys %{ $hook->[$htype] || {} }
455 or set_should_invoke $htype, 0;
459 # clear package objects
460 %$_ = () for values %{ $TERM->{_pkg} };
469 sub urxvt::term::proxy::AUTOLOAD {
470 $urxvt::term::proxy::AUTOLOAD =~ /:([^:]+)$/
471 or die "FATAL: \$AUTOLOAD '$urxvt::term::proxy::AUTOLOAD' unparsable";
474 sub $urxvt::term::proxy::AUTOLOAD {
476 \$proxy->{term}->$1 (\@_)
479 } or die "FATAL: unable to compile method forwarder: $@";
481 goto &$urxvt::term::proxy::AUTOLOAD;
484 =head2 The C<urxvt::term> Class
488 =item $value = $term->resource ($name[, $newval])
490 Returns the current resource value associated with a given name and
491 optionally sets a new value. Setting values is most useful in the C<init>
492 hook. Unset resources are returned and accepted as C<undef>.
494 The new value must be properly encoded to a suitable character encoding
495 before passing it to this method. Similarly, the returned value may need
496 to be converted from the used encoding to text.
498 Resource names are as defined in F<src/rsinc.h>. Colours can be specified
499 as resource names of the form C<< color+<index> >>, e.g. C<color+5>. (will
502 Please note that resource strings will currently only be freed when the
503 terminal is destroyed, so changing options frequently will eat memory.
505 Here is a a likely non-exhaustive list of resource names, not all of which
506 are supported in every build, please see the source to see the actual
509 answerbackstring backgroundPixmap backspace_key boldFont boldItalicFont
510 borderLess color cursorBlink cursorUnderline cutchars delete_key
511 display_name embed ext_bwidth fade font geometry hold iconName
512 imFont imLocale inputMethod insecure int_bwidth intensityStyles
513 italicFont jumpScroll lineSpace loginShell mapAlert menu meta8 modifier
514 mouseWheelScrollPage name pastableTabs path perl_eval perl_ext_1 perl_ext_2
515 perl_lib pointerBlank pointerBlankDelay preeditType print_pipe pty_fd
516 reverseVideo saveLines scrollBar scrollBar_align scrollBar_floating
517 scrollBar_right scrollBar_thickness scrollTtyKeypress scrollTtyOutput
518 scrollWithBuffer scrollstyle secondaryScreen secondaryScroll selectstyle
519 shade term_name title transparent transparent_all tripleclickwords
520 utmpInhibit visualBell
524 sub urxvt::term::resource($$;$) {
525 my ($self, $name) = (shift, shift);
526 unshift @_, $self, $name, ($name =~ s/\s*\+\s*(\d+)$// ? $1 : 0);
527 goto &urxvt::term::_resource;
530 =item $rend = $term->rstyle ([$new_rstyle])
532 Return and optionally change the current rendition. Text that is output by
533 the terminal application will use this style.
535 =item ($row, $col) = $term->screen_cur ([$row, $col])
537 Return the current coordinates of the text cursor position and optionally
538 set it (which is usually bad as applications don't expect that).
540 =item ($row, $col) = $term->selection_mark ([$row, $col])
542 =item ($row, $col) = $term->selection_beg ([$row, $col])
544 =item ($row, $col) = $term->selection_end ([$row, $col])
546 Return the current values of the selection mark, begin or end positions,
547 and optionally set them to new values.
549 =item $success = $term->selection_grab ($eventtime)
551 Try to request the primary selection from the server (for example, as set
554 =item $oldtext = $term->selection ([$newtext])
556 Return the current selection text and optionally replace it by C<$newtext>.
558 #=item $term->overlay ($x, $y, $text)
560 #Create a simple multi-line overlay box. See the next method for details.
564 #sub urxvt::term::scr_overlay {
565 # my ($self, $x, $y, $text) = @_;
567 # my @lines = split /\n/, $text;
570 # for (map $self->strwidth ($_), @lines) {
571 # $w = $_ if $w < $_;
574 # $self->scr_overlay_new ($x, $y, $w, scalar @lines);
575 # $self->scr_overlay_set (0, $_, $lines[$_]) for 0.. $#lines;
578 =item $term->overlay ($x, $y, $width, $height[, $rstyle[, $border]])
580 Create a new (empty) overlay at the given position with the given
581 width/height. C<$rstyle> defines the initial rendition style
582 (default: C<OVERLAY_RSTYLE>).
584 If C<$border> is C<2> (default), then a decorative border will be put
587 If either C<$x> or C<$y> is negative, then this is counted from the
588 right/bottom side, respectively.
590 This method returns an urxvt::overlay object. The overlay will be visible
591 as long as the perl object is referenced.
593 The methods currently supported on C<urxvt::overlay> objects are:
597 =item $overlay->set ($x, $y, $text, $rend)
599 Similar to C<< $term->ROW_t >> and C<< $term->ROW_r >> in that it puts
600 text in rxvt-unicode's special encoding and an array of rendition values
601 at a specific position inside the overlay.
605 If visible, hide the overlay, but do not destroy it.
609 If hidden, display the overlay again.
613 =item $cellwidth = $term->strwidth $string
615 Returns the number of screen-cells this string would need. Correctly
616 accounts for wide and combining characters.
618 =item $octets = $term->locale_encode $string
620 Convert the given text string into the corresponding locale encoding.
622 =item $string = $term->locale_decode $octets
624 Convert the given locale-encoded octets into a perl string.
626 =item $term->scr_add_lines ($string)
628 Write the given text string to the screen, as if output by the application
629 running inside the terminal. It may not contain command sequences (escape
630 codes), but is free to use line feeds, carriage returns and tabs. The
631 string is a normal text string, not in locale-dependent encoding.
633 Normally its not a good idea to use this function, as programs might be
634 confused by changes in cursor position or scrolling. Its useful inside a
635 C<on_add_lines> hook, though.
637 =item $term->tt_write ($octets)
639 Write the octets given in C<$data> to the tty (i.e. as program input). To
640 pass characters instead of octets, you should convert your strings first
641 to the locale-specific encoding using C<< $term->locale_encode >>.
643 =item $window_width = $term->width
645 =item $window_height = $term->height
647 =item $font_width = $term->fwidth
649 =item $font_height = $term->fheight
651 =item $font_ascent = $term->fbase
653 =item $terminal_rows = $term->nrow
655 =item $terminal_columns = $term->ncol
657 =item $has_focus = $term->focus
659 =item $is_mapped = $term->mapped
661 =item $max_scrollback = $term->saveLines
663 =item $nrow_plus_saveLines = $term->total_rows
665 =item $lines_in_scrollback = $term->nsaved
667 Return various integers describing terminal characteristics.
669 =item $view_start = $term->view_start ([$newvalue])
671 Returns the negative row number of the topmost line. Minimum value is
672 C<0>, which displays the normal terminal contents. Larger values scroll
673 this many lines into the scrollback buffer.
675 =item $term->want_refresh
677 Requests a screen refresh. At the next opportunity, rxvt-unicode will
678 compare the on-screen display with its stored representation. If they
679 differ, it redraws the differences.
681 Used after changing terminal contents to display them.
683 =item $text = $term->ROW_t ($row_number[, $new_text[, $start_col]])
685 Returns the text of the entire row with number C<$row_number>. Row C<0>
686 is the topmost terminal line, row C<< $term->$ncol-1 >> is the bottommost
687 terminal line. The scrollback buffer starts at line C<-1> and extends to
688 line C<< -$term->nsaved >>. Nothing will be returned if a nonexistent line
691 If C<$new_text> is specified, it will replace characters in the current
692 line, starting at column C<$start_col> (default C<0>), which is useful
693 to replace only parts of a line. The font index in the rendition will
694 automatically be updated.
696 C<$text> is in a special encoding: tabs and wide characters that use more
697 than one cell when displayed are padded with urxvt::NOCHAR characters
698 (C<chr 65535>). Characters with combining characters and other characters
699 that do not fit into the normal tetx encoding will be replaced with
700 characters in the private use area.
702 You have to obey this encoding when changing text. The advantage is
703 that C<substr> and similar functions work on screen cells and not on
706 The methods C<< $term->special_encode >> and C<< $term->special_decode >>
707 can be used to convert normal strings into this encoding and vice versa.
709 =item $rend = $term->ROW_r ($row_number[, $new_rend[, $start_col]])
711 Like C<< $term->ROW_t >>, but returns an arrayref with rendition
712 bitsets. Rendition bitsets contain information about colour, font, font
713 styles and similar information. See also C<< $term->ROW_t >>.
715 When setting rendition, the font mask will be ignored.
717 See the section on RENDITION, above.
719 =item $length = $term->ROW_l ($row_number[, $new_length])
721 Returns the number of screen cells that are in use ("the line
722 length"). Unlike the urxvt core, this returns C<< $term->ncol >> if the
723 line is joined with the following one.
725 =item $bool = $term->is_longer ($row_number)
727 Returns true if the row is part of a multiple-row logical "line" (i.e.
728 joined with the following row), which means all characters are in use
729 and it is continued on the next row (and possibly a continuation of the
732 =item $line = $term->line ($row_number)
734 Create and return a new C<urxvt::line> object that stores information
735 about the logical line that row C<$row_number> is part of. It supports the
740 =item $text = $line->t
742 Returns the full text of the line, similar to C<ROW_t>
744 =item $rend = $line->r
746 Returns the full rendition array of the line, similar to C<ROW_r>
748 =item $length = $line->l
750 Returns the length of the line in cells, similar to C<ROW_l>.
752 =item $rownum = $line->beg
754 =item $rownum = $line->end
756 Return the row number of the first/last row of the line, respectively.
758 =item $offset = $line->offset_of ($row, $col)
760 Returns the character offset of the given row|col pair within the logical
763 =item ($row, $col) = $line->coord_of ($offset)
765 Translates a string offset into terminal coordinates again.
771 sub urxvt::term::line {
772 my ($self, $row) = @_;
774 my $maxrow = $self->nrow - 1;
776 my ($beg, $end) = ($row, $row);
778 --$beg while $self->ROW_is_longer ($beg - 1);
779 ++$end while $self->ROW_is_longer ($end) && $end < $maxrow;
785 len => ($end - $beg) * $self->ncol + $self->ROW_l ($end),
792 substr +(join "", map $self->{term}->ROW_t ($_), $self->{beg} .. $self->{end}),
800 map @{ $self->{term}->ROW_r ($_) }, $self->{beg} .. $self->{end}
802 $#$rend = $self->{len} - 1;
806 sub urxvt::line::beg { $_[0]{beg} }
807 sub urxvt::line::end { $_[0]{end} }
808 sub urxvt::line::l { $_[0]{len} }
810 sub urxvt::line::offset_of {
811 my ($self, $row, $col) = @_;
813 ($row - $self->{beg}) * $self->{term}->ncol + $col
816 sub urxvt::line::coord_of {
817 my ($self, $offset) = @_;
822 $offset / $self->{term}->ncol + $self->{beg},
823 $offset % $self->{term}->ncol
827 =item ($row, $col) = $line->coord_of ($offset)
828 =item $text = $term->special_encode $string
830 Converts a perl string into the special encoding used by rxvt-unicode,
831 where one character corresponds to one screen cell. See
832 C<< $term->ROW_t >> for details.
834 =item $string = $term->special_decode $text
836 Converts rxvt-unicodes text reprsentation into a perl string. See
837 C<< $term->ROW_t >> for details.
841 =head2 The C<urxvt::timer> Class
843 This class implements timer watchers/events. Time is represented as a
844 fractional number of seconds since the epoch. Example:
846 $term->{overlay} = $term->overlay (-1, 0, 8, 1, urxvt::OVERLAY_RSTYLE, 0);
847 $term->{timer} = urxvt::timer
851 $term->{overlay}->set (0, 0,
852 sprintf "%2d:%02d:%02d", (localtime urxvt::NOW)[2,1,0]);
857 =item $timer = new urxvt::timer
859 Create a new timer object in started state. It is scheduled to fire
862 =item $timer = $timer->cb (sub { my ($timer) = @_; ... })
864 Set the callback to be called when the timer triggers.
866 =item $tstamp = $timer->at
868 Return the time this watcher will fire next.
870 =item $timer = $timer->set ($tstamp)
872 Set the time the event is generated to $tstamp.
874 =item $timer = $timer->interval ($interval)
876 Normally (and when C<$interval> is C<0>), the timer will automatically
877 stop after it has fired once. If C<$interval> is non-zero, then the timer
878 is automatically rescheduled at the given intervals.
880 =item $timer = $timer->start
884 =item $timer = $timer->start ($tstamp)
886 Set the event trigger time to C<$tstamp> and start the timer.
888 =item $timer = $timer->stop
894 =head2 The C<urxvt::iow> Class
896 This class implements io watchers/events. Example:
898 $term->{socket} = ...
899 $term->{iow} = urxvt::iow
901 ->fd (fileno $term->{socket})
902 ->events (1) # wait for read data
905 my ($iow, $revents) = @_;
906 # $revents must be 1 here, no need to check
907 sysread $term->{socket}, my $buf, 8192
914 =item $iow = new urxvt::iow
916 Create a new io watcher object in stopped state.
918 =item $iow = $iow->cb (sub { my ($iow, $reventmask) = @_; ... })
920 Set the callback to be called when io events are triggered. C<$reventmask>
921 is a bitset as described in the C<events> method.
923 =item $iow = $iow->fd ($fd)
925 Set the filedescriptor (not handle) to watch.
927 =item $iow = $iow->events ($eventmask)
929 Set the event mask to watch. Bit #0 (value C<1>) enables watching for read
930 data, Bit #1 (value C<2>) enables watching for write data.
932 =item $iow = $iow->start
934 Start watching for requested events on the given handle.
936 =item $iow = $iow->stop
938 Stop watching for events on the given filehandle.
944 =head2 URXVT_PERL_VERBOSITY
946 This variable controls the verbosity level of the perl extension. Higher
947 numbers indicate more verbose output.
951 =item =0 - only fatal messages
953 =item =3 - script loading and management
955 =item =10 - all events received
961 Marc Lehmann <pcg@goof.com>
962 http://software.schmorp.de/pkg/rxvt-unicode