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Revision 1.1089 by root, Mon Jun 4 21:39:56 2012 UTC vs.
Revision 1.1292 by sf-exg, Sat Dec 31 10:15:06 2022 UTC

14 or something like that. guys, send me a patch. 14 or something like that. guys, send me a patch.
15WISH: coloured pastebin 15WISH: coloured pastebin
16WISH: load system-wide config file even if we don't have one 16WISH: load system-wide config file even if we don't have one
17WISH: look into XAddConnectionWatch, does anybody need that? 17WISH: look into XAddConnectionWatch, does anybody need that?
18DUMB: support tex fonts 18DUMB: support tex fonts
19TODO: decrqm http://ue.tst.eu/71d7dbd1fcfeaa7d2a4b96eb957d570c.txt
20TODO: perl-shell-window? perl-unix-socket? 19TODO: perl-shell-window? perl-unix-socket?
21TODO: command line editing when icanon? 20TODO: command line editing when icanon?
22TODO: split ROW into a ROW_fast (0..total*2-1) and ROW macros? 21TODO: split ROW into a ROW_fast (0..total*2-1) and ROW macros?
23 22TODO: catch exceptions when calling perl hooks
24TODO: DEC PM 4h/4l should toggle jumpscroll on or off (PrivMode_smoothScroll) 23TODO: xdbe
24TODO: optimise bg reeval for resize for common patterns (pixmap bigger than window?)
25TODO: pack rxvt_fatal messages into the exception object 25TODO: pack rxvt_fatal messages into the exception object
26TODO: catch exceptions when calling perl hooks 26TODO: load must not cache, but global image cache must be cleaned
27TODO: find out about overhead of NOTHROW 27TODO: description into --help output?
28TODO: xrender, versiobn check for filters, or use query filters instead? 28TODO: rxvt -help => (see rxvt-XXX(1))?
29TODO: something resets the bg pixmap afetr on_start 29TODO: xor_rect should shift right
309.16 30TODO IMPL: recalc bg only when not fully covering (no alpha, repeat|extend etc..)
31 - the "alpha" release. 31
32 - remove support for libafterimage. 32TODO IMPL: colour-change event with index
33TODO IMPL: recalc bg always on bg colour change
34
35TODO: document typical actions in rxvt.1.pod keysyms
36TODO: warn with a graphical message when env has been modified
37TODO: c&c perl socket via daemon-ext mechanism
38TODO: simplify extension metainfo cache, cache on disk
39TODO: URxvt::Ext::Name installs urxvt ext name and provides pod/manpage for URxvt::Ext::Name
40TODO: pixel droppins idenrasm,ll,scrollup
41TODO: cuu/cud and probably others default to 1 when arg is 0, not just missing, in xterm/vt102, but not in rxvt
42TODO: clean up the resource vs. long option mess, especially in the manpage.
43TODO: think about daemon delaying urxvt client exit.
44IDEA: use harfbuzz to render combining sequences, maybe also complex scripts
45
46TODO: rclock horribly time-biased
47TODO: rclock iso mode?
48
49TODO: printf "\e[4:3m" - "undercurl" - should probbaly be interpreted as underline, rather than \e[43m
50
51 - implement a fix for CVE-2022-4170 (reported and analyzed by David Leadbeater).
52 While present in version 9.30, it should not be exploitable. It is exploitable
53 in versions 9.25 and 9.26, at least, and allows anybody controlling output to
54 the terminal to execute arbitrary code in the urxvt process.
55 - the background extension no longer requires off focus fading support
56 to be compiled in.
57 - the confirm-paste extension now offers a choice betwene pasting the original
58 or a sanitized version, and also frees up memory used to store the paste text
59 immediately.
60 - fix compiling without frills.
61 - fix rewrapMode: never.
62 - fix regression that caused urxvt to no longer emit responses
63 to OSC color queries other than OSC 4 ones.
64 - fix regression that caused urxvt to no longer process OSC 705.
65 - restore CENTURY to be 1900 to "improve" year parsing in urclock (or at
66 least go back to the old interpretation) (based on an analysis
67 by Tommy Pettersson).
68 - exec_async (used e.g. by the matcher extension to spawn processes) now
69 sets the URXVT_EXT_WINDOWID variable to the window id of the terminal.
70 - implement -fps option/refreshRate resource to change the default 60 Hz
71 maximum refresh limiter. I always wanted an fps option, but had to
72 wait for a user requesting it.
73 - new clickthrough extension.
74 - perl now also requires Xext.
75 - X region and shape extension functionality has been exposed to perl
76 extensions.
77 - RENDER extension no longer depends on ENABLE_XIM_ONTHESPOT.
78
799.30 Sat 27 Nov 2021 21:07:09 CET
80 - the background extension did not initialise properly when automatically
81 loaded via the OSC.
82 - new "on_attach" hook type implemented, to initialise late-loading
83 extensions.
84
859.29 Mon 22 Nov 2021 18:07:14 CET
86 - libptytty (http://dist.schmorp.de/libptytty/) is now a required
87 external dependency.
88 - enable confirm-paste extension by default, can be disabled by e.g.
89 URxvt.perl-ext: -confirm-paste
90 - Key bindings specified with the -keysym option or with resources of
91 the form URxvt*keysym work again. Such resources, as opposed to
92 resources of the form URxvt.keysym, were not officially allowed but
93 accepted, so ignoring them is considered a regression.
94 - new option/resource -rm/rewrapMode, which sets the line rewrap
95 mode to auto, never or always.
96 - new option/resource -dpb/disablePasteBrackets, which can be used to
97 disable bracketed paste mode sequences, as more and more programs
98 abuse these sequences (typically in the name of security, but these
99 sequences are not improving security). Also, bracketed paste mode
100 is now under frills.
101 - add manpage for urclock.
102 - confirm-paste wrongly considered brackets as ctrlchars (patch by
103 Jakub Wilk, debian bug #995244).
104 - if urxvt cannot detect a good estimate for font width (because a font does
105 not contain latin characters at all for example), it will now fall
106 back to xft's max_advance_width, which works well with some fonts. It
107 currently will warn about this.
108 - do not render variation selectors in the default font as boxes, treat
109 them as zero-width characters.
110 - change combining character architecture to allow fonts to handle
111 combining sequences on their own. This could allow future renderers
112 to be more intelligent about these sequences.
113 - use the previous enhancement to allow unicode characters outside of the
114 BMP to be rendered even without --enable-unicode3, as long as an
115 xft with the character is configured.
116 It's recommended to stay with disabled unicode3 even more now.
117 - freetype/xft have been verified to return nonsensical offsets for
118 combining characters. urxvt tries to compensate to some extent,
119 but diacritics will be slightly off in many cases, and far off in
120 some cases (e.g. input mono).
121 - when checking for overlap/careful handling, take non-basefont
122 character shifts into account.
123 - extensions can now request autoloading on OSC and Perl OSC sequences,
124 implement this for the background, clipboard-osc and overlay-osc
125 extensions.
126 - the background extension will now be autoloaded when the OSC 20 or 705
127 sequence is received.
128 - added OSC 776 sequence to return character cell width, height and font
129 ascent, which is useful when using urxvt as slave to calculate window
130 size form or to row/column count.
131 - matcher extension documentation now points out some requirements for
132 regular expressions. the default url matching regex will now try
133 to match IRLs in addition to URLs.
134 - The view_start perl method now scrolls to the bottom also when the
135 argument is greater than 0.
136 - eval scroll actions now scroll to the bottom when scrolling down and
137 there are less lines to scroll than the ones requested (reported by
138 Stephen Talley).
139 - allow perl-ext and perl-ext-common to override autoloaded extensions.
140 this allows tabbed to disable itself in subtabs, avoiding recursive
141 loading.
142 - update precompose table to unicode 13.0.
143 - update charset conversion tables to perl 5.32 (this only affected
144 cs_koi8_u_from_unicode).
145 - unicode characters > 0x100000 were not handled correctly w.r.t.
146 font rendering.
147 - replace bitstream vera by dejavu sans, as it has replaced the former
148 almost everywhere.
149 - urxvt will now try tic -x first and only fall back to tic without -x
150 when tic -x fails.
151 - fix urclock not erasing the old date on the clock face, causing
152 overdraw, plus a host of other small fixes and improvements.
153 - shave off over 1K of code size from urclock by replacing the sine table
154 with a slightly less accurate fixed point approximation.
155 - do not specify indentation with =over in pod, this is no longer
156 needed with semi-modern pod tools and gives the formatter more
157 stylistic freedom.
158 - background extension did not set the "size-sensitive" flag
159 when repeat mode wasn't normal.
160 - extensions are now subjected to "use strict 'subs'".
161 - avoid crashing when xft successfully opens a font but then somehow
162 can't lock the face.
163 - locale_decode/encode api methods now pass through undef unchanged.
164 - fix undefined behaviour in the perl hook function, as diagnosed by clang.
165
1669.26 Fri May 14 19:14:14 CEST 2021
167 - ev_iouring.c was wrongly required during compilation, and wrongly
168 not packaged.
169
1709.25 Fri May 14 15:51:36 CEST 2021
171 - for the 17.5th anniversary, and because many distributions seem to
172 remove rxvt in favour of urxvt, this release resurrects rclock as
173 urclock.
174 - add support for systemd socket-based activation - debian bug #917105,
175 freebsd bug #234276.
176 - do not destruct perl on exit anymore: this might fail for a variety of
177 reasons, and takes unnecessary time.
178 - remove any macros from urxvtperl manpage(s), should fix debian
179 bug 858385.
180 - the old bg image resources are now provided by the background
181 extension, and perl is thus required for bg image support. No
182 configuration change is needed: urxvt autoloads the background
183 ext if any bg image resource/option is present (for OSC sequences to
184 work you need to enable it explicitly). The old bg image
185 resources are also now deprecated; users are encouraged to
186 switch to the new bg image interface (see man urxvt-background).
187 - confirm-paste now checks for any ctlchars, not just newlines.
188 - searchable scrollback will now ignore bracketed paste mode sequences
189 (prompted by Daniel Gröber's patch).
190 - drop ISO 2022 locale support. ISO 2022 encodings are not supported in
191 POSIX locales and clash with vt100 charset emulation (the luit
192 program can be used as a substitute).
193 - perl didn't parse rgba colours specified as an array correctly,
194 only allowing 0 and 100% intensity for each component (this affected
195 fill and tint).
196 - when iterating over resources, urxvt will now try to properly handle
197 multipart resources (such as "*background.expr"), for the benefit
198 of autoloading perl extensions.
199 - ESC G (query rxvt graphics mode) has been disabled due to security
200 implications. The rxvt graphics mode was removed in rxvt-unicode 1.5,
201 and no programs relying on being able to query the mode are known.
202 - work around API change breakage in perl 5.28, based on a patch by
203 Roman Bogorodskiy.
204 - improved security: rob nation's (obsolete) graphics mode queries
205 no longer reply with linefeed in secure/default mode.
206 - ISO 8613-3 direct colour SGR sequences (patch by Fengguang Wu).
207 - xterm focus reporting mode (patch by Daniel Hahler).
208 - xterm SGR mouse mode.
209 - implement DECRQM. Patch by Přemysl Eric Janouch.
210 - add missing color index parameter to OSC 4 response. Patch
211 by Přemysl Eric Janouch.
212 - in some window managers, if smart resize was enabled, urxvt
213 erroneously moved the window on font change - awesome bug
214 #532, arch linux bug ##34807 (patch by Uli Schlachter).
215 - fix urxvtd crash when using a background expression.
216 - properly restore colors when using fading and reverse video
217 is enabled while urxvt is focused and then disabled while it
218 is not focused, or vice versa (patch by Daniel Hahler).
219 - fix high memory usage when an extension repeatedly hides and
220 shows an overlay (reported by Marcel Lautenbach).
221 - expose priv_modes member and constants to perl extensions
222 (patch by Rastislav Barlik).
223 - fix a whole slew of const sillyness, unfortunately forced upon
224 us by ISO C++.
225 - update to libecb 0x00010006.
226 - disable all thread support in ecb.h as we presumably don't need it.
227 - slightly improve Makefile source dependencies.
228 - work around bugs in newer Pod::Xhtml versions (flags incorrect formatting codes
229 in xhtml/html sections but does not interpret correct ones).
230
2319.22 Sat Jan 23 21:07:33 CET 2016
232 - NOTICE: this release updates terminfo.
233 - add terminfo capabilities for various ctrl and shift-ctrl key variants
234 (patch by Sebastian Schmidt).
235 - fix longstanding core font encoding bug where some character
236 ranges could not be mapped from unicode to the font: affected
237 encodings are big5, gb2312, iso8859-8 (hebrew), jis0201 and
238 ksc5601 (reported by Mikachu).
239 - fix crash when the number of columns is 1 and a 0 width character is inserted
240 (reported by Kuang-che Wu).
241 - fix a crash when parsing an invalid color specification (reported by Kuang-che Wu).
242 - fix a buffer overflow in font name parser (reported by Kuang-che Wu).
243 - do not start blinking cursor if the window is unfocused (reported by
244 Devin J. Pohly).
245 - change the width of underline and i-beam cursor to 2 pixels (based on
246 a patch by Omar Sandoval).
247 - add pointerShape resource to change the mouse pointer shape
248 (based on a patch by Brian Watson).
249 - a keysym resource for a key which is already bound to an
250 action now properly rebinds the key.
251 - do not report mouse motion events if Shift is active (patch by Daniel Hahler).
252 - put the alpha component last in responses to OSC color queries
253 (patch by Benjamin Herr).
254 - the key_press hook is now invoked before processing the
255 event, as documented. This change was done in 9.21 but not
256 announced and fixes debian bugs #511377, #531751 and red hat
257 bug #1105069. Note that this change breaks a few scripts,
258 such as mark-yank-urls, which rely on the previous buggy
259 behaviour that urxvt processes the event (in particular
260 keysym bindings) before invoking the hook.
261 - the tabbed extension now properly refreshes the active tab
262 on a key press when the mouse pointer is outside the terminal
263 window.
264 - add 'lookup_keysym' perl method to lookup the action bound
265 to a key combination.
266 - a key combination bound to 'matcher:select' can now be used
267 to cycle through the matches in matcher.
268 - change perl integer accessors (->width et al.) into mutators.
269 - this version has ben verified to work with perl 5.8.3.
270
2719.21 Wed Dec 31 14:50:03 CET 2014
272 - the "moa redraw 8-bit british vintage colour management" release.
273 - NOTICE: this release updates terminfo.
274 - fix pixel droppings on overdraw when a secondary core font has the
275 same height but different ascent.
276 - implement cvvis in terminfo as blinking cursor, to distinguish it
277 from cnorm (emacs uses cvvis which is commonly a blinking cursor).
278 - when xft support was compiled in, colour queries erroneously returned
279 premultiplied values, this also affected internal queries, for example
280 when calculating faded colour. alpha is now divided out when possible,
281 which is more correct but loses colour resolution.
282 - add DECSCUSR xterm extension to set the cursor to a vertical bar.
283 - add 'extension:string' action, and associated on_action perl
284 hook, for keysym resources that invokes actions provided by
285 perl extensions. The 'perl:string' action and
286 on_user_command hook are deprecated but still supported.
287 - add 'builtin-string' action for keysym resources that restores string
288 mappings for keys that have predefined actions in urxvt.
289 - add -k option to urxvtc for killing the daemon process.
290 - document urxvtd's -e/--eval option that was implemented in 9.16,
291 but not documented.
292 - add -dockapp option to make the wm treat urxvt as a dockapp.
293 - add -mc option and multiClickTime resource to set the maximum time
294 between multi-click select events (patch by Joe Peterson).
295 - new 'eval' extension to evaluate arbitrary perl code with keysym
296 bindings. The extension also provides methods that implement basic
297 actions, such as pasting selections and scrolling.
298 - the macosx-clipboard and macosx-clipboard-native extensions have been removed.
299 - kuake extension now uses the kuake.hotkey resource to specify the hotkey.
300 - new 'matcher:select' mode of matcher to iterate over the matches with the keyboard.
301 - the 'matcher:list' feature of matcher now honours the launcher
302 associated to a matched pattern.
303 - speed-up matcher underlining on very long lines (reported by Edward Z. Yang).
304 - fix up/down commands of searchable-scrollback so that they always move
305 to the previous/next logical line with a match, if any.
306 - searchable-scrollback resource has been deprecated (use keysym instead).
307 - extension parameter passing is deprecated (use resource mechanism instead).
308 - upgrade to GPLv3 (see COPYING).
309 - compile out of the box on Solaris 10, again.
310 - fix height and position of the stippled area in next scrollbar (patch
311 by Thomas Otto).
312 - fix off-by-one bug causing the iso14755 window not to jump out of the
313 way properly.
314 - fix crash that may happen if a lib to which urxvt is linked to calls setenv.
315 - fix memory leak in special_{encode,decode} perl methods.
316 - fix refresh bug that occurs when reverse video is set on a cell
317 containing a space and with the same bg and fg colour, red hat bug
318 #830236.
319 - fix crash that may happen if an x error is received after a terminal
320 window/popup has been destroyed already.
321 - removed superfluous 0 digit from sgr terminfo sequence.
322 - greatly improve colour allocation on colour-starved pseudocolour
323 displays to avoid read-write cells instead of simply failing
324 (this is only relevant for antique 8bpp frame buffers).
325 - do not free fade colours when not doing fading (this is likely
326 only relevant for antique 8bpp frame buffers).
327 - do not specialcase 2 or 4 colour visuals, leading to
328 simpler and actually more correct code.
329 - hopefully no longer leak colours on !truecolour visuals.
330 - use consistent method names (scr_recolour => scr_recolor).
331 - use simpler (but slightly less bogus) formula for nearest
332 colour choice (this is likely only relevant for antique 8bpp
333 frame buffers).
334 - remove fallback behaviour when initialising colours - the
335 behaviour was inconsistent between startup vs. later and
336 was only effective when valid colours couldn't be allocated.
337
3389.20 Sat Apr 26 16:22:27 CEST 2014
339 - (libptytty) fix bug that prevented urxvtd from writing utmp
340 entries when using --fork (reported by Ryan Kavanagh).
341 - security bugfix: window property values could be queried even
342 in secure mode (reported by Conor McCarthy).
343 - fix build when perl is enabled and fading is disabled.
344 - fix regression that broke continuous scrolling when pressing
345 and holding the scrollbar up or down button, gentoo bug #493992.
346 - increase the maximum length of a command sequence to 32k bytes,
347 to allow longer OSC sequences (previous limit was 2k).
348 - new Ctrl-Meta-c and Ctrl-Meta-v bindings to interact with
349 the CLIPBOARD selection.
350 - new extension: selection-to-clipboard.
351 - the extensions macosx-clipboard and macosx-clipboard-native
352 are deprecated and will be removed in the next release.
353 Support for the clipboard on OS X can be more generally
354 enabled by setting the XQuartz preference to sync the OS X
355 pasteboard and the X11 clipboard.
356
3579.19 Sun Oct 27 17:16:07 CET 2013
358 - work around perl 5.18.0 breakage in tabbed extension
359 (reported by Karol Blazewicz) and in pod (Dominic Hargreaves).
360 - fix regression that caused the double-click word selection to
361 erroneously include a tab on the left of the selected word.
362 - implement FOCUS variable and focus_fade function in background
363 expression, to allow focus-sensitive background images.
364 - add support for the set cursor style (DECSCUSR) control
365 function.
366 - honour cursorColor also when the cursor style is underline.
367 - export some Color_xxx constants to Perl.
368
3699.18 Sun Mar 24 15:33:35 CET 2013
370 - fix regression that caused artifacts on resize.
371
3729.17 Fri Mar 1 13:46:08 CET 2013
373 - add shade operator in background perl extension.
374 - avoid starting or ending the selection in the middle of wide
375 characters to avoid artifacts (reported by Tiago Resende).
376 - fix artifacts that may occur if the character in the cursor
377 cell has width > 1 (reported by Tiago Resende).
378 - fix regression that causes artifacts on scrolling if
379 saveLines is 0 and the window is resized (reported by Bert
380 Münnich).
381 - fix build when perl is enabled and pixbuf and transparency
382 are disabled.
383
3849.16 Thu Dec 27 11:56:43 CET 2012
385 - the "so much new stuff your eyes will pop out" release.
386 - INCOMPATIBLE CHANGE: renamed urlLauncher resource to url-launcher.
33 - fix processing of DEC private mode save sequences (patch by Patrick 387 - fix processing of DEC private mode save sequences (patch by Patrick
34 Hemmer). 388 Hemmer).
389 - perl extensions now have their own manpages, installed as urxvt-NAME(1),
390 e.g. urxvt-background(1) - see urxvt-extensions(1) for a list.
35 - fix disabling of cursor blink with the option-popup menu (based on a 391 - fix disabling of cursor blink with the option-popup menu (based on a
36 patch by Jan Larres). 392 patch by Jan Larres).
37 - the font height is not augmented anymore when lineSpace is non zero. 393 - the font height is not augmented anymore when lineSpace is non zero.
38 - fix "new pagemap" vs. "delete pagemap" mismatch ([] vs. non-[]), 394 - fix "new pagemap" vs. "delete pagemap" mismatch ([] vs. non-[]),
39 as diagnosed by clang. 395 as diagnosed by clang.
40 - fix height mismatch between active and inactive cursor when 396 - fix height mismatch between active and inactive cursor when
41 lineSpace is non zero (patch by Stanislav Seletskiy). 397 lineSpace is non zero (patch by Stanislav Seletskiy).
42 - make it compile with LOCAL_X_IS_UNIX again (reported by 398 - make it compile with LOCAL_X_IS_UNIX again (reported by
43 nickfailure@gmail.com). 399 nickfailure@gmail.com).
400 - completely redone background pixmap support - users can now
401 specify arbitrary expressions (And programs) that calculate
402 new terminal backgrounds. see the urxvt-background manpage
403 for details.
404 - xrender is now required for background pixmap support.
405 - perl extensions can now provide commandline switches and resources
406 which show up in -help etc.
407 - iso14755 51 mode window now displays row and column.
408 - implement a -visual switch and move that and -depth to frills, also
409 warn when we can't get the requested visual.
410 - new env variable: RXVT_PERL_LIB.
411 - allocate all screen memory in one go and let the virtual memory
412 subsystem sort it out. this simplifies code, improves access
413 locality, saves a bit of ram and makes things a bit faster, too.
414 - remove support for libafterimage.
44 - update to CVS version of libev, for a whopping 11kb size decrease. 415 - update to CVS version of libev, for a whopping 11kb size decrease.
45 - do not ship yet another copy of ecb.h, use the one in libev or 416 - do not ship yet another copy of ecb.h, use the one in libev or
46 libptytty instead. 417 libptytty instead.
47 - allocate all screen memory in one go and let the virtual memory
48 subsystem sort it out. this simplifies code, improves access
49 locality, saves a bit of ram and makes things a bit faster, too.
50 - selectively mark some methods as cache-hot/cache cold, which 418 - selectively mark some methods as cache-hot/cache cold, which
51 might speed up execution but definitely decreases codesize. 419 might speed up execution but definitely decreases codesize.
420 - Fix regression that prevented the scrollbar trough color
421 from being applied (reported by Derek B. Noonburg).
422 - Fix the scrollbar size for rxvt style (patch by Mark Robinson).
52 423
539.15 Sat Jan 21 13:36:56 CET 2012 4249.15 Sat Jan 21 13:36:56 CET 2012
54 - remove "using namespace std" because clang erroneously 425 - remove "using namespace std" because clang erroneously
55 thinks thats an error. 426 thinks thats an error.
56 - finding a matching font (e.g. bold version of the base font) 427 - finding a matching font (e.g. bold version of the base font)
123 - fix regression in processing of SelectionNotify events. 494 - fix regression in processing of SelectionNotify events.
124 urxvt would fail to request a selection if the owner did not 495 urxvt would fail to request a selection if the owner did not
125 support the UTF8_STRING target. 496 support the UTF8_STRING target.
126 - fix rendering of double width chars in certain circumstances, more 497 - fix rendering of double width chars in certain circumstances, more
127 likely to happen if urxvt is compiled with 256 colors support as 498 likely to happen if urxvt is compiled with 256 colors support as
128 urxvt runs out of fonts much earlier then. Fixes gentoo bug #358151 499 urxvt runs out of fonts much earlier then. Fixes gentoo bug #358151
129 (Emanuele Giaquinta). 500 (Emanuele Giaquinta).
130 - restore support for 'list' syntax in keysym resources (requested by Sung Pae). 501 - restore support for 'list' syntax in keysym resources (requested by Sung Pae).
131 - always premultiply colour values - while this increases differences between 502 - always premultiply colour values - while this increases differences between
132 core fonts and xft, it is "more correct" in practical situations. 503 core fonts and xft, it is "more correct" in practical situations.
133 - disable PTYTTY_REENTRANT option - not needed for urxvt and saves a bit of code. 504 - disable PTYTTY_REENTRANT option - not needed for urxvt and saves a bit of code.

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