[ViewVC] Diff of: cvs/rxvt-unicode/README.FAQ

Comparing rxvt-unicode/README.FAQ (file contents):
Revision 1.33 by root, Sat Jan 28 22:16:58 2006 UTC vs.
Revision 1.72 by root, Sat May 14 08:28:25 2016 UTC

1	FREQUENTLY ASKED QUESTIONS	1	RXVT-UNICODE/URXVT FREQUENTLY ASKED QUESTIONS
2	The new selection selects pieces that are too big, how can I select	2	Meta, Features & Commandline Issues
3	single words?	3	My question isn't answered here, can I ask a human?
4	Yes. For example, if you want to select alphanumeric words, you can	4	Before sending me mail, you could go to IRC: "irc.freenode.net", channel
5	use the following resource:	5	"#rxvt-unicode" has some rxvt-unicode enthusiasts that might be
		6	interested in learning about new and exciting problems (but not FAQs :).
6		7
7	URxvt.selection.pattern-0: ([[:word:]]+)	8	I use Gentoo, and I have a problem...
		9	There are two big problems with Gentoo Linux: first, most if not all
		10	Gentoo systems are completely broken (missing or mismatched header
		11	files, broken compiler etc. are just the tip of the iceberg); secondly,
		12	it should be called Gentoo GNU/Linux.
8		13
9	If you click more than twice, the selection will be extended more	14	For these reasons, it is impossible to support rxvt-unicode on Gentoo.
10	and more.	15	Problems appearing on Gentoo systems will usually simply be ignored
		16	unless they can be reproduced on non-Gentoo systems.
11		17
12	To get a selection that is very similar to the old code, try this
13	pattern:
14
15	URxvt.selection.pattern-0: ([^"&'()*,;<=>?@[\\\\]^`{\|})]+)
16
17	Please also note that the LeftClick Shift-LeftClik combination
18	also selects words like the old code.
19
20	I don't like the new selection/popups/hotkeys/perl, how do I
21	change/disable it?
22	You can disable the perl extension completely by setting the
23	perl-ext-common resource to the empty string, which also keeps
24	rxvt-unicode from initialising perl, saving memory.
25
26	If you only want to disable specific features, you first have to
27	identify which perl extension is responsible. For this, read the
28	section PREPACKAGED EXTENSIONS in the rxvtperl(3) manpage. For
29	example, to disable the selection-popup and option-popup, specify
30	this perl-ext-common resource:
31
32	URxvt.perl-ext-common: default,-selection-popup,-option-popup
33
34	This will keep the default extensions, but disable the two popup
35	extensions. Some extensions can also be configured, for example,
36	scrollback search mode is triggered by M-s. You can move it to any
37	other combination either by setting the searchable-scrollback
38	resource:
39
40	URxvt.searchable-scrollback: CM-s
41
42	Isn't rxvt supposed to be small? Don't all those features bloat?
43	I often get asked about this, and I think, no, they didn't cause
44	extra bloat. If you compare a minimal rxvt and a minimal urxvt, you
45	can see that the urxvt binary is larger (due to some encoding tables
46	always being compiled in), but it actually uses less memory (RSS)
47	after startup. Even with "--disable-everything", this comparison is
48	a bit unfair, as many features unique to urxvt (locale, encoding
49	conversion, iso14755 etc.) are already in use in this mode.
50
51	text data bss drs rss filename
52	98398 1664 24 15695 1824 rxvt --disable-everything
53	188985 9048 66616 18222 1788 urxvt --disable-everything
54
55	When you "--enable-everything" (which _is_ unfair, as this involves
56	xft and full locale/XIM support which are quite bloaty inside libX11
57	and my libc), the two diverge, but not unreasnobaly so.
58
59	text data bss drs rss filename
60	163431 2152 24 20123 2060 rxvt --enable-everything
61	1035683 49680 66648 29096 3680 urxvt --enable-everything
62
63	The very large size of the text section is explained by the
64	east-asian encoding tables, which, if unused, take up disk space but
65	nothing else and can be compiled out unless you rely on X11 core
66	fonts that use those encodings. The BSS size comes from the 64k
67	emergency buffer that my c++ compiler allocates (but of course
68	doesn't use unless you are out of memory). Also, using an xft font
69	instead of a core font immediately adds a few megabytes of RSS. Xft
70	indeed is responsible for a lot of RSS even when not used.
71
72	Of course, due to every character using two or four bytes instead of
73	one, a large scrollback buffer will ultimately make rxvt-unicode use
74	more memory.
75
76	Compared to e.g. Eterm (5112k), aterm (3132k) and xterm (4680k),
77	this still fares rather well. And compared to some monsters like
78	gnome-terminal (21152k + extra 4204k in separate processes) or
79	konsole (22200k + extra 43180k in daemons that stay around after
80	exit, plus half a minute of startup time, including the hundreds of
81	warnings it spits out), it fares extremely well g.
82
83	Why C++, isn't that unportable/bloated/uncool?
84	Is this a question? :) It comes up very often. The simple answer is:
85	I had to write it, and C++ allowed me to write and maintain it in a
86	fraction of the time and effort (which is a scarce resource for me).
87	Put even shorter: It simply wouldn't exist without C++.
88
89	My personal stance on this is that C++ is less portable than C, but
90	in the case of rxvt-unicode this hardly matters, as its portability
91	limits are defined by things like X11, pseudo terminals, locale
92	support and unix domain sockets, which are all less portable than
93	C++ itself.
94
95	Regarding the bloat, see the above question: It's easy to write
96	programs in C that use gobs of memory, an certainly possible to
97	write programs in C++ that don't. C++ also often comes with large
98	libraries, but this is not necessarily the case with GCC. Here is
99	what rxvt links against on my system with a minimal config:
100
101	libX11.so.6 => /usr/X11R6/lib/libX11.so.6 (0x00002aaaaabc3000)
102	libc.so.6 => /lib/libc.so.6 (0x00002aaaaadde000)
103	libdl.so.2 => /lib/libdl.so.2 (0x00002aaaab01d000)
104	/lib64/ld-linux-x86-64.so.2 (0x00002aaaaaaab000)
105
106	And here is rxvt-unicode:
107
108	libX11.so.6 => /usr/X11R6/lib/libX11.so.6 (0x00002aaaaabc3000)
109	libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00002aaaaada2000)
110	libc.so.6 => /lib/libc.so.6 (0x00002aaaaaeb0000)
111	libdl.so.2 => /lib/libdl.so.2 (0x00002aaaab0ee000)
112	/lib64/ld-linux-x86-64.so.2 (0x00002aaaaaaab000)
113
114	No large bloated libraries (of course, none were linked in
115	statically), except maybe libX11 :)
116
117	Does it support tabs, can I have a tabbed rxvt-unicode?	18	Does it support tabs, can I have a tabbed rxvt-unicode?
118	Beginning with version 7.3, there is a perl extension that	19	Beginning with version 7.3, there is a perl extension that implements a
119	implements a simple tabbed terminal. It is installed by default, so	20	simple tabbed terminal. It is installed by default, so any of these
120	any of these should give you tabs:	21	should give you tabs:
121		22
122	rxvt -pe tabbed	23	urxvt -pe tabbed
123		24
124	URxvt.perl-ext-common: default,tabbed	25	URxvt.perl-ext-common: default,tabbed
125		26
126	It will also work fine with tabbing functionality of many window	27	It will also work fine with tabbing functionality of many window
127	managers or similar tabbing programs, and its embedding-features	28	managers or similar tabbing programs, and its embedding-features allow
128	allow it to be embedded into other programs, as witnessed by	29	it to be embedded into other programs, as witnessed by doc/rxvt-tabbed
129	doc/rxvt-tabbed or the upcoming "Gtk2::URxvt" perl module, which	30	or the upcoming "Gtk2::URxvt" perl module, which features a tabbed urxvt
130	features a tabbed urxvt (murxvt) terminal as an example embedding	31	(murxvt) terminal as an example embedding application.
131	application.
132		32
133	How do I know which rxvt-unicode version I'm using?	33	How do I know which rxvt-unicode version I'm using?
134	The version number is displayed with the usage (-h). Also the escape	34	The version number is displayed with the usage (-h). Also the escape
135	sequence "ESC [ 8 n" sets the window title to the version number.	35	sequence "ESC [ 8 n" sets the window title to the version number. When
136	When using the rxvtc client, the version displayed is that of the	36	using the urxvtc client, the version displayed is that of the daemon.
137	daemon.
138		37
139	I am using Debian GNU/Linux and have a problem...	38	Rxvt-unicode uses gobs of memory, how can I reduce that?
140	The Debian GNU/Linux package of rxvt-unicode in sarge contains large	39	Rxvt-unicode tries to obey the rule of not charging you for something
141	patches that considerably change the behaviour of rxvt-unicode (but	40	you don't use. One thing you should try is to configure out all settings
142	unfortunately this notice has been removed). Before reporting a bug	41	that you don't need, for example, Xft support is a resource hog by
143	to the original rxvt-unicode author please download and install the	42	design, when used. Compiling it out ensures that no Xft font will be
144	genuine version (<http://software.schmorp.de#rxvt-unicode>) and try	43	loaded accidentally when rxvt-unicode tries to find a font for your
145	to reproduce the problem. If you cannot, chances are that the	44	characters.
146	problems are specific to Debian GNU/Linux, in which case it should
147	be reported via the Debian Bug Tracking System (use "reportbug" to
148	report the bug).
149		45
150	For other problems that also affect the Debian package, you can and	46	Also, many people (me included) like large windows and even larger
151	probably should use the Debian BTS, too, because, after all, it's	47	scrollback buffers: Without "--enable-unicode3", rxvt-unicode will use 6
152	also a bug in the Debian version and it serves as a reminder for	48	bytes per screen cell. For a 160x?? window this amounts to almost a
153	other users that might encounter the same issue.	49	kilobyte per line. A scrollback buffer of 10000 lines will then (if
		50	full) use 10 Megabytes of memory. With "--enable-unicode3" it gets
		51	worse, as rxvt-unicode then uses 8 bytes per screen cell.
154		52
155	I am maintaining rxvt-unicode for distribution/OS XXX, any	53	How can I start urxvtd in a race-free way?
156	recommendation?	54	Try "urxvtd -f -o", which tells urxvtd to open the display, create the
157	You should build one binary with the default options. configure now	55	listening socket and then fork.
158	enables most useful options, and the trend goes to making them
159	runtime-switchable, too, so there is usually no drawback to enbaling
160	them, except higher disk and possibly memory usage. The perl
161	interpreter should be enabled, as important functionality (menus,
162	selection, likely more in the future) depends on it.
163		56
164	You should not overwrite the "perl-ext-common" snd "perl-ext"	57	How can I start urxvtd automatically when I run urxvtc?
165	resources system-wide (except maybe with "defaults"). This will	58	If you want to start urxvtd automatically whenever you run urxvtc and
166	result in useful behaviour. If your distribution aims at low memory,	59	the daemon isn't running yet, use this script:
167	add an empty "perl-ext-common" resource to the app-defaults file.	60
168	This will keep the perl interpreter disabled until the user enables	61	#!/bin/sh
		62	urxvtc "$@"
		63	if [ $? -eq 2 ]; then
		64	urxvtd -q -o -f
		65	urxvtc "$@"
169	it.	66	fi
170		67
171	If you can/want build more binaries, I recommend building a minimal	68	This tries to create a new terminal, and if fails with exit status 2,
172	one with "--disable-everything" (very useful) and a maximal one with	69	meaning it couldn't connect to the daemon, it will start the daemon and
173	"--enable-everything" (less useful, it will be very big due to a lot	70	re-run the command. Subsequent invocations of the script will re-use the
174	of encodings built-in that increase download times and are rarely	71	existing daemon.
175	used).
176		72
177	I need to make it setuid/setgid to support utmp/ptys on my OS, is this	73	How do I distinguish whether I'm running rxvt-unicode or a regular
178	safe?	74	xterm? I need this to decide about setting colours etc.
179	It should be, starting with release 7.1. You are encouraged to	75	The original rxvt and rxvt-unicode always export the variable
180	properly install urxvt with privileges necessary for your OS now.	76	"COLORTERM", so you can check and see if that is set. Note that several
		77	programs, JED, slrn, Midnight Commander automatically check this
		78	variable to decide whether or not to use colour.
181		79
182	When rxvt-unicode detects that it runs setuid or setgid, it will	80	How do I set the correct, full IP address for the DISPLAY variable?
183	fork into a helper process for privileged operations (pty handling	81	If you've compiled rxvt-unicode with DISPLAY_IS_IP and have enabled
184	on some systems, utmp/wtmp/lastlog handling on others) and drop	82	insecure mode then it is possible to use the following shell script
185	privileges immediately. This is much safer than most other terminals	83	snippets to correctly set the display. If your version of rxvt-unicode
186	that keep privileges while running (but is more relevant to urxvt,	84	wasn't also compiled with ESCZ_ANSWER (as assumed in these snippets)
187	as it contains things as perl interpreters, which might be "helpful"	85	then the COLORTERM variable can be used to distinguish rxvt-unicode from
188	to attackers).	86	a regular xterm.
189		87
190	This forking is done as the very first within main(), which is very	88	Courtesy of Chuck Blake <cblake@BBN.COM> with the following shell script
191	early and reduces possible bugs to initialisation code run before	89	snippets:
192	main(), or things like the dynamic loader of your system, which
193	should result in very little risk.
194		90
		91	# Bourne/Korn/POSIX family of shells:
		92	[ ${TERM:-foo} = foo ] && TERM=xterm # assume an xterm if we don't know
		93	if [ ${TERM:-foo} = xterm ]; then
		94	stty -icanon -echo min 0 time 15 # see if enhanced rxvt or not
		95	printf "\eZ"
		96	read term_id
		97	stty icanon echo
		98	if [ ""${term_id} = '^[[?1;2C' -a ${DISPLAY:-foo} = foo ]; then
		99	printf '\e[7n' # query the rxvt we are in for the DISPLAY string
		100	read DISPLAY # set it in our local shell
		101	fi
		102	fi
		103
		104	How do I compile the manual pages on my own?
		105	You need to have a recent version of perl installed as /usr/bin/perl,
		106	one that comes with pod2man, pod2text and pod2xhtml (from Pod::Xhtml).
		107	Then go to the doc subdirectory and enter "make alldoc".
		108
		109	Isn't rxvt-unicode supposed to be small? Don't all those features bloat?
		110	I often get asked about this, and I think, no, they didn't cause extra
		111	bloat. If you compare a minimal rxvt and a minimal urxvt, you can see
		112	that the urxvt binary is larger (due to some encoding tables always
		113	being compiled in), but it actually uses less memory (RSS) after
		114	startup. Even with "--disable-everything", this comparison is a bit
		115	unfair, as many features unique to urxvt (locale, encoding conversion,
		116	iso14755 etc.) are already in use in this mode.
		117
		118	text data bss drs rss filename
		119	98398 1664 24 15695 1824 rxvt --disable-everything
		120	188985 9048 66616 18222 1788 urxvt --disable-everything
		121
		122	When you "--enable-everything" (which is unfair, as this involves xft
		123	and full locale/XIM support which are quite bloaty inside libX11 and my
		124	libc), the two diverge, but not unreasonably so.
		125
		126	text data bss drs rss filename
		127	163431 2152 24 20123 2060 rxvt --enable-everything
		128	1035683 49680 66648 29096 3680 urxvt --enable-everything
		129
		130	The very large size of the text section is explained by the east-asian
		131	encoding tables, which, if unused, take up disk space but nothing else
		132	and can be compiled out unless you rely on X11 core fonts that use those
		133	encodings. The BSS size comes from the 64k emergency buffer that my c++
		134	compiler allocates (but of course doesn't use unless you are out of
		135	memory). Also, using an xft font instead of a core font immediately adds
		136	a few megabytes of RSS. Xft indeed is responsible for a lot of RSS even
		137	when not used.
		138
		139	Of course, due to every character using two or four bytes instead of
		140	one, a large scrollback buffer will ultimately make rxvt-unicode use
		141	more memory.
		142
		143	Compared to e.g. Eterm (5112k), aterm (3132k) and xterm (4680k), this
		144	still fares rather well. And compared to some monsters like
		145	gnome-terminal (21152k + extra 4204k in separate processes) or konsole
		146	(22200k + extra 43180k in daemons that stay around after exit, plus half
		147	a minute of startup time, including the hundreds of warnings it spits
		148	out), it fares extremely well g.
		149
		150	Why C++, isn't that unportable/bloated/uncool?
		151	Is this a question? :) It comes up very often. The simple answer is: I
		152	had to write it, and C++ allowed me to write and maintain it in a
		153	fraction of the time and effort (which is a scarce resource for me). Put
		154	even shorter: It simply wouldn't exist without C++.
		155
		156	My personal stance on this is that C++ is less portable than C, but in
		157	the case of rxvt-unicode this hardly matters, as its portability limits
		158	are defined by things like X11, pseudo terminals, locale support and
		159	unix domain sockets, which are all less portable than C++ itself.
		160
		161	Regarding the bloat, see the above question: It's easy to write programs
		162	in C that use gobs of memory, and certainly possible to write programs
		163	in C++ that don't. C++ also often comes with large libraries, but this
		164	is not necessarily the case with GCC. Here is what rxvt links against on
		165	my system with a minimal config:
		166
		167	libX11.so.6 => /usr/X11R6/lib/libX11.so.6 (0x00002aaaaabc3000)
		168	libc.so.6 => /lib/libc.so.6 (0x00002aaaaadde000)
		169	libdl.so.2 => /lib/libdl.so.2 (0x00002aaaab01d000)
		170	/lib64/ld-linux-x86-64.so.2 (0x00002aaaaaaab000)
		171
		172	And here is rxvt-unicode:
		173
		174	libX11.so.6 => /usr/X11R6/lib/libX11.so.6 (0x00002aaaaabc3000)
		175	libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00002aaaaada2000)
		176	libc.so.6 => /lib/libc.so.6 (0x00002aaaaaeb0000)
		177	libdl.so.2 => /lib/libdl.so.2 (0x00002aaaab0ee000)
		178	/lib64/ld-linux-x86-64.so.2 (0x00002aaaaaaab000)
		179
		180	No large bloated libraries (of course, none were linked in statically),
		181	except maybe libX11 :)
		182
		183	Rendering, Font & Look and Feel Issues
		184	I can't get transparency working, what am I doing wrong?
		185	First of all, transparency isn't officially supported in rxvt-unicode,
		186	so you are mostly on your own. Do not bug the author about it (but you
		187	may bug everybody else). Also, if you can't get it working consider it a
		188	rite of passage: ... and you failed.
		189
		190	Here are four ways to get transparency. Do read the manpage and option
		191	descriptions for the programs mentioned and rxvt-unicode. Really, do it!
		192
		193	1. Use transparent mode:
		194
		195	Esetroot wallpaper.jpg
		196	urxvt -tr -tint red -sh 40
		197
		198	That works. If you think it doesn't, you lack transparency and tinting
		199	support, or you are unable to read. This method requires that the
		200	background-setting program sets the _XROOTPMAP_ID or ESETROOT_PMAP_ID
		201	property. Compatible programs are Esetroot, hsetroot and feh.
		202
		203	2. Use a simple pixmap and emulate pseudo-transparency. This enables you
		204	to use effects other than tinting and shading: Just shade/tint/whatever
		205	your picture with gimp or any other tool:
		206
		207	convert wallpaper.jpg -blur 20x20 -modulate 30 background.jpg
		208	urxvt -pixmap "background.jpg;:root"
		209
		210	That works. If you think it doesn't, you lack GDK-PixBuf support, or you
		211	are unable to read.
		212
		213	3. Use an ARGB visual:
		214
		215	urxvt -depth 32 -fg grey90 -bg rgba:0000/0000/4444/cccc
		216
		217	This requires XFT support, and the support of your X-server. If that
		218	doesn't work for you, blame Xorg and Keith Packard. ARGB visuals aren't
		219	there yet, no matter what they claim. Rxvt-Unicode contains the
		220	necessary bugfixes and workarounds for Xft and Xlib to make it work, but
		221	that doesn't mean that your WM has the required kludges in place.
		222
		223	4. Use xcompmgr and let it do the job:
		224
		225	xprop -frame -f _NET_WM_WINDOW_OPACITY 32c \
		226	-set _NET_WM_WINDOW_OPACITY 0xc0000000
		227
		228	Then click on a window you want to make transparent. Replace 0xc0000000
		229	by other values to change the degree of opacity. If it doesn't work and
		230	your server crashes, you got to keep the pieces.
		231
		232	Why does rxvt-unicode sometimes leave pixel droppings?
		233	Most fonts were not designed for terminal use, which means that
		234	character size varies a lot. A font that is otherwise fine for terminal
		235	use might contain some characters that are simply too wide. Rxvt-unicode
		236	will avoid these characters. For characters that are just "a bit" too
		237	wide a special "careful" rendering mode is used that redraws adjacent
		238	characters.
		239
		240	All of this requires that fonts do not lie about character sizes,
		241	however: Xft fonts often draw glyphs larger than their acclaimed
		242	bounding box, and rxvt-unicode has no way of detecting this (the correct
		243	way is to ask for the character bounding box, which unfortunately is
		244	wrong in these cases).
		245
		246	It's not clear (to me at least), whether this is a bug in Xft, freetype,
		247	or the respective font. If you encounter this problem you might try
		248	using the "-lsp" option to give the font more height. If that doesn't
		249	work, you might be forced to use a different font.
		250
		251	All of this is not a problem when using X11 core fonts, as their
		252	bounding box data is correct.
		253
		254	How can I keep rxvt-unicode from using reverse video so much?
		255	First of all, make sure you are running with the right terminal settings
		256	("TERM=rxvt-unicode"), which will get rid of most of these effects. Then
		257	make sure you have specified colours for italic and bold, as otherwise
		258	rxvt-unicode might use reverse video to simulate the effect:
		259
		260	URxvt.colorBD: white
		261	URxvt.colorIT: green
		262
		263	Some programs assume totally weird colours (red instead of blue), how can I fix that?
		264	For some unexplainable reason, some rare programs assume a very weird
		265	colour palette when confronted with a terminal with more than the
		266	standard 8 colours (rxvt-unicode supports 88). The right fix is, of
		267	course, to fix these programs not to assume non-ISO colours without very
		268	good reasons.
		269
		270	In the meantime, you can either edit your "rxvt-unicode" terminfo
		271	definition to only claim 8 colour support or use "TERM=rxvt", which will
		272	fix colours but keep you from using other rxvt-unicode features.
		273
		274	Can I switch the fonts at runtime?
		275	Yes, using an escape sequence. Try something like this, which has the
		276	same effect as using the "-fn" switch, and takes effect immediately:
		277
		278	printf '\33]50;%s\007' "9x15bold,xft:Kochi Gothic"
		279
		280	This is useful if you e.g. work primarily with japanese (and prefer a
		281	japanese font), but you have to switch to chinese temporarily, where
		282	japanese fonts would only be in your way.
		283
		284	You can think of this as a kind of manual ISO-2022 switching.
		285
		286	Why do italic characters look as if clipped?
		287	Many fonts have difficulties with italic characters and hinting. For
		288	example, the otherwise very nicely hinted font "xft:Bitstream Vera Sans
		289	Mono" completely fails in its italic face. A workaround might be to
		290	enable freetype autohinting, i.e. like this:
		291
		292	URxvt.italicFont: xft:Bitstream Vera Sans Mono:italic:autohint=true
		293	URxvt.boldItalicFont: xft:Bitstream Vera Sans Mono:bold:italic:autohint=true
		294
		295	Can I speed up Xft rendering somehow?
		296	Yes, the most obvious way to speed it up is to avoid Xft entirely, as it
		297	is simply slow. If you still want Xft fonts you might try to disable
		298	antialiasing (by appending ":antialias=false"), which saves lots of
		299	memory and also speeds up rendering considerably.
		300
		301	Rxvt-unicode doesn't seem to anti-alias its fonts, what is wrong?
		302	Rxvt-unicode will use whatever you specify as a font. If it needs to
		303	fall back to its default font search list it will prefer X11 core fonts,
		304	because they are small and fast, and then use Xft fonts. It has
		305	antialiasing disabled for most of them, because the author thinks they
		306	look best that way.
		307
		308	If you want antialiasing, you have to specify the fonts manually.
		309
		310	What's with this bold/blink stuff?
		311	If no bold colour is set via "colorBD:", bold will invert text using the
		312	standard foreground colour.
		313
		314	For the standard background colour, blinking will actually make the text
		315	blink when compiled with "--enable-text-blink". Without
		316	"--enable-text-blink", the blink attribute will be ignored.
		317
		318	On ANSI colours, bold/blink attributes are used to set high-intensity
		319	foreground/background colours.
		320
		321	color0-7 are the low-intensity colours.
		322
		323	color8-15 are the corresponding high-intensity colours.
		324
		325	I don't like the screen colours. How do I change them?
		326	You can change the screen colours at run-time using ~/.Xdefaults
		327	resources (or as long-options).
		328
		329	Here are values that are supposed to resemble a VGA screen, including
		330	the murky brown that passes for low-intensity yellow:
		331
		332	URxvt.color0: #000000
		333	URxvt.color1: #A80000
		334	URxvt.color2: #00A800
		335	URxvt.color3: #A8A800
		336	URxvt.color4: #0000A8
		337	URxvt.color5: #A800A8
		338	URxvt.color6: #00A8A8
		339	URxvt.color7: #A8A8A8
		340
		341	URxvt.color8: #000054
		342	URxvt.color9: #FF0054
		343	URxvt.color10: #00FF54
		344	URxvt.color11: #FFFF54
		345	URxvt.color12: #0000FF
		346	URxvt.color13: #FF00FF
		347	URxvt.color14: #00FFFF
		348	URxvt.color15: #FFFFFF
		349
		350	And here is a more complete set of non-standard colours.
		351
		352	URxvt.cursorColor: #dc74d1
		353	URxvt.pointerColor: #dc74d1
		354	URxvt.background: #0e0e0e
		355	URxvt.foreground: #4ad5e1
		356	URxvt.color0: #000000
		357	URxvt.color8: #8b8f93
		358	URxvt.color1: #dc74d1
		359	URxvt.color9: #dc74d1
		360	URxvt.color2: #0eb8c7
		361	URxvt.color10: #0eb8c7
		362	URxvt.color3: #dfe37e
		363	URxvt.color11: #dfe37e
		364	URxvt.color5: #9e88f0
		365	URxvt.color13: #9e88f0
		366	URxvt.color6: #73f7ff
		367	URxvt.color14: #73f7ff
		368	URxvt.color7: #e1dddd
		369	URxvt.color15: #e1dddd
		370
		371	They have been described (not by me) as "pretty girly".
		372
		373	Why do some characters look so much different than others?
		374	See next entry.
		375
		376	How does rxvt-unicode choose fonts?
		377	Most fonts do not contain the full range of Unicode, which is fine.
		378	Chances are that the font you (or the admin/package maintainer of your
		379	system/os) have specified does not cover all the characters you want to
		380	display.
		381
		382	rxvt-unicode makes a best-effort try at finding a replacement font.
		383	Often the result is fine, but sometimes the chosen font looks
		384	bad/ugly/wrong. Some fonts have totally strange characters that don't
		385	resemble the correct glyph at all, and rxvt-unicode lacks the artificial
		386	intelligence to detect that a specific glyph is wrong: it has to believe
		387	the font that the characters it claims to contain indeed look correct.
		388
		389	In that case, select a font of your taste and add it to the font list,
		390	e.g.:
		391
		392	urxvt -fn basefont,font2,font3...
		393
		394	When rxvt-unicode sees a character, it will first look at the base font.
		395	If the base font does not contain the character, it will go to the next
		396	font, and so on. Specifying your own fonts will also speed up this
		397	search and use less resources within rxvt-unicode and the X-server.
		398
		399	The only limitation is that none of the fonts may be larger than the
		400	base font, as the base font defines the terminal character cell size,
		401	which must be the same due to the way terminals work.
		402
		403	Why do some chinese characters look so different than others?
		404	This is because there is a difference between script and language --
		405	rxvt-unicode does not know which language the text that is output is, as
		406	it only knows the unicode character codes. If rxvt-unicode first sees a
		407	japanese/chinese character, it might choose a japanese font for display.
		408	Subsequent japanese characters will use that font. Now, many chinese
		409	characters aren't represented in japanese fonts, so when the first
		410	non-japanese character comes up, rxvt-unicode will look for a chinese
		411	font -- unfortunately at this point, it will still use the japanese font
		412	for chinese characters that are also in the japanese font.
		413
		414	The workaround is easy: just tag a chinese font at the end of your font
		415	list (see the previous question). The key is to view the font list as a
		416	preference list: If you expect more japanese, list a japanese font
		417	first. If you expect more chinese, put a chinese font first.
		418
		419	In the future it might be possible to switch language preferences at
		420	runtime (the internal data structure has no problem with using different
		421	fonts for the same character at the same time, but no interface for this
		422	has been designed yet).
		423
		424	Until then, you might get away with switching fonts at runtime (see "Can
		425	I switch the fonts at runtime?" later in this document).
		426
		427	How can I make mplayer display video correctly?
		428	We are working on it, in the meantime, as a workaround, use something
		429	like:
		430
		431	urxvt -b 600 -geometry 20x1 -e sh -c 'mplayer -wid $WINDOWID file...'
		432
		433	Why is the cursor now blinking in emacs/vi/...?
		434	This is likely caused by your editor/program's use of the "cvvis"
		435	terminfo capability. Emacs uses it by default, as well as some versions
		436	of vi and possibly other programs.
		437
		438	In emacs, you can switch that off by adding this to your ".emacs" file:
		439
		440	(setq visible-cursor nil)
		441
		442	For other programs, if they do not have an option, your have to remove
		443	the "cvvis" capability from the terminfo description.
		444
		445	When urxvt first added the blinking cursor option, it didn't add a
		446	"cvvis" capability, which served no purpose before. Version 9.21
		447	introduced "cvvis" (and the ability to control blinking independent of
		448	cursor shape) for compatibility with other terminals, which
		449	traditionally use a blinking cursor for "cvvis". This also reflects the
		450	intent of programs such as emacs, who expect "cvvis" to enable a
		451	blinking cursor.
		452
		453	Keyboard, Mouse & User Interaction
		454	The new selection selects pieces that are too big, how can I select single words?
		455	If you want to select e.g. alphanumeric words, you can use the following
		456	setting:
		457
		458	URxvt.selection.pattern-0: ([[:word:]]+)
		459
		460	If you click more than twice, the selection will be extended more and
		461	more.
		462
		463	To get a selection that is very similar to the old code, try this
		464	pattern:
		465
		466	URxvt.selection.pattern-0: ([^"&'()*,;<=>?@[\\\\]^`{\|})]+)
		467
		468	Please also note that the LeftClick Shift-LeftClick combination also
		469	selects words like the old code.
		470
		471	I don't like the new selection/popups/hotkeys/perl, how do I change/disable it?
		472	You can disable the perl extension completely by setting the
		473	perl-ext-common resource to the empty string, which also keeps
		474	rxvt-unicode from initialising perl, saving memory.
		475
		476	If you only want to disable specific features, you first have to
		477	identify which perl extension is responsible. For this, read the section
		478	PREPACKAGED EXTENSIONS in the urxvtperl(3) manpage. For example, to
		479	disable the selection-popup and option-popup, specify this
		480	perl-ext-common resource:
		481
		482	URxvt.perl-ext-common: default,-selection-popup,-option-popup
		483
		484	This will keep the default extensions, but disable the two popup
		485	extensions. Some extensions can also be configured, for example,
		486	scrollback search mode is triggered by M-s. You can move it to any other
		487	combination by adding a keysym resource that binds the desired
		488	combination to the "start" action of "searchable-scrollback" and another
		489	one that binds M-s to the "builtin:" action:
		490
		491	URxvt.keysym.CM-s: searchable-scrollback:start
		492	URxvt.keysym.M-s: builtin:
		493
		494	The cursor moves when selecting text in the current input line, how do I switch this off?
		495	See next entry.
		496
		497	During rlogin/ssh/telnet/etc. sessions, clicking near the cursor outputs strange escape sequences, how do I fix this?
		498	These are caused by the "readline" perl extension. Under normal
		499	circumstances, it will move your cursor around when you click into the
		500	line that contains it. It tries hard not to do this at the wrong moment,
		501	but when running a program that doesn't parse cursor movements or in
		502	some cases during rlogin sessions, it fails to detect this properly.
		503
		504	You can permanently switch this feature off by disabling the "readline"
		505	extension:
		506
		507	URxvt.perl-ext-common: default,-readline
		508
		509	My numeric keypad acts weird and generates differing output?
		510	Some Debian GNU/Linux users seem to have this problem, although no
		511	specific details were reported so far. It is possible that this is
		512	caused by the wrong "TERM" setting, although the details of whether and
		513	how this can happen are unknown, as "TERM=rxvt" should offer a
		514	compatible keymap. See the answer to the previous question, and please
		515	report if that helped.
		516
		517	My Compose (Multi_key) key is no longer working.
		518	The most common causes for this are that either your locale is not set
		519	correctly, or you specified a preeditType that is not supported by your
		520	input method. For example, if you specified OverTheSpot and your input
		521	method (e.g. the default input method handling Compose keys) does not
		522	support this (for instance because it is not visual), then rxvt-unicode
		523	will continue without an input method.
		524
		525	In this case either do not specify a preeditType or specify more than
		526	one pre-edit style, such as OverTheSpot,Root,None.
		527
		528	If it still doesn't work, then maybe your input method doesn't support
		529	compose sequences - to fall back to the built-in one, make sure you
		530	don't specify an input method via "-im" or "XMODIFIERS".
		531
		532	I cannot type "Ctrl-Shift-2" to get an ASCII NUL character due to ISO 14755
		533	Either try "Ctrl-2" alone (it often is mapped to ASCII NUL even on
		534	international keyboards) or simply use ISO 14755 support to your
		535	advantage, typing <Ctrl-Shift-0> to get a ASCII NUL. This works for
		536	other codes, too, such as "Ctrl-Shift-1-d" to type the default telnet
		537	escape character and so on.
		538
		539	Mouse cut/paste suddenly no longer works.
		540	Make sure that mouse reporting is actually turned off since killing some
		541	editors prematurely may leave it active. I've heard that tcsh may use
		542	mouse reporting unless it is otherwise specified. A quick check is to
		543	see if cut/paste works when the Alt or Shift keys are pressed.
		544
		545	What's with the strange Backspace/Delete key behaviour?
		546	Assuming that the physical Backspace key corresponds to the Backspace
		547	keysym (not likely for Linux ... see the following question) there are
		548	two standard values that can be used for Backspace: "^H" and "^?".
		549
		550	Historically, either value is correct, but rxvt-unicode adopts the
		551	debian policy of using "^?" when unsure, because it's the one and only
		552	correct choice :).
		553
		554	It is possible to toggle between "^H" and "^?" with the DECBKM private
		555	mode:
		556
		557	# use Backspace = ^H
		558	$ stty erase ^H
		559	$ printf "\e[?67h"
		560
		561	# use Backspace = ^?
		562	$ stty erase ^?
		563	$ printf "\e[?67l"
		564
		565	This helps satisfy some of the Backspace discrepancies that occur, but
		566	if you use Backspace = "^H", make sure that the termcap/terminfo value
		567	properly reflects that.
		568
		569	The Delete key is a another casualty of the ill-defined Backspace
		570	problem. To avoid confusion between the Backspace and Delete keys, the
		571	Delete key has been assigned an escape sequence to match the vt100 for
		572	Execute ("ESC [ 3 ~") and is in the supplied termcap/terminfo.
		573
		574	Some other Backspace problems:
		575
		576	some editors use termcap/terminfo, some editors (vim I'm told) expect
		577	Backspace = ^H, GNU Emacs (and Emacs-like editors) use ^H for help.
		578
		579	Perhaps someday this will all be resolved in a consistent manner.
		580
		581	I don't like the key-bindings. How do I change them?
		582	There are some compile-time selections available via configure. Unless
		583	you have run "configure" with the "--disable-resources" option you can
		584	use the `keysym' resource to alter the keystrings associated with
		585	keysyms.
		586
		587	Here's an example for a URxvt session started using "urxvt -name URxvt"
		588
		589	URxvt.keysym.Prior: \033[5~
		590	URxvt.keysym.Next: \033[6~
		591	URxvt.keysym.Home: \033[7~
		592	URxvt.keysym.End: \033[8~
		593	URxvt.keysym.Up: \033[A
		594	URxvt.keysym.Down: \033[B
		595	URxvt.keysym.Right: \033[C
		596	URxvt.keysym.Left: \033[D
		597
		598	See some more examples in the documentation for the keysym resource.
		599
		600	I'm using keyboard model XXX that has extra Prior/Next/Insert keys. How do I make use of them? For example, the Sun Keyboard type 4 has the following map
		601	KP_Insert == Insert
		602	F22 == Print
		603	F27 == Home
		604	F29 == Prior
		605	F33 == End
		606	F35 == Next
		607
		608	Rather than have rxvt-unicode try to accommodate all the various
		609	possible keyboard mappings, it is better to use `xmodmap' to remap the
		610	keys as required for your particular machine.
		611
		612	Terminal Configuration
		613	Can I see a typical configuration?
		614	The default configuration tries to be xterm-like, which I don't like
		615	that much, but it's least surprise to regular users.
		616
		617	As a rxvt or rxvt-unicode user, you are practically supposed to invest
		618	time into customising your terminal. To get you started, here is the
		619	author's .Xdefaults entries, with comments on what they do. It's
		620	certainly not typical, but what's typical...
		621
		622	URxvt.cutchars: "()*,<>[]{}\|'
		623	URxvt.print-pipe: cat >/tmp/xxx
		624
		625	These are just for testing stuff.
		626
		627	URxvt.imLocale: ja_JP.UTF-8
		628	URxvt.preeditType: OnTheSpot,None
		629
		630	This tells rxvt-unicode to use a special locale when communicating with
		631	the X Input Method, and also tells it to only use the OnTheSpot pre-edit
		632	type, which requires the "xim-onthespot" perl extension but rewards me
		633	with correct-looking fonts.
		634
		635	URxvt.perl-lib: /root/lib/urxvt
		636	URxvt.perl-ext-common: default,selection-autotransform,selection-pastebin,xim-onthespot,remote-clipboard
		637	URxvt.selection.pattern-0: ( at .*? line \\d+)
		638	URxvt.selection.pattern-1: ^(/[^:]+):\
		639	URxvt.selection-autotransform.0: s/^([^:[:space:]]+):(\\d+):?$/:e \\Q$1\\E\\x0d:$2\\x0d/
		640	URxvt.selection-autotransform.1: s/^ at (.*?) line (\\d+)$/:e \\Q$1\\E\\x0d:$2\\x0d/
		641
		642	This is my perl configuration. The first two set the perl library
		643	directory and also tells urxvt to use a large number of extensions. I
		644	develop for myself mostly, so I actually use most of the extensions I
		645	write.
		646
		647	The selection stuff mainly makes the selection perl-error-message aware
		648	and tells it to convert perl error messages into vi-commands to load the
		649	relevant file and go to the error line number.
		650
		651	URxvt.scrollstyle: plain
		652	URxvt.secondaryScroll: true
		653
		654	As the documentation says: plain is the preferred scrollbar for the
		655	author. The "secondaryScroll" configures urxvt to scroll in full-screen
		656	apps, like screen, so lines scrolled out of screen end up in urxvt's
		657	scrollback buffer.
		658
		659	URxvt.background: #000000
		660	URxvt.foreground: gray90
		661	URxvt.color7: gray90
		662	URxvt.colorBD: #ffffff
		663	URxvt.cursorColor: #e0e080
		664	URxvt.throughColor: #8080f0
		665	URxvt.highlightColor: #f0f0f0
		666
		667	Some colours. Not sure which ones are being used or even non-defaults,
		668	but these are in my .Xdefaults. Most notably, they set
		669	foreground/background to light gray/black, and also make sure that the
		670	colour 7 matches the default foreground colour.
		671
		672	URxvt.underlineColor: yellow
		673
		674	Another colour, makes underline lines look different. Sometimes hurts,
		675	but is mostly a nice effect.
		676
		677	URxvt.geometry: 154x36
		678	URxvt.loginShell: false
		679	URxvt.meta: ignore
		680	URxvt.utmpInhibit: true
		681
		682	Uh, well, should be mostly self-explanatory. By specifying some defaults
		683	manually, I can quickly switch them for testing.
		684
		685	URxvt.saveLines: 8192
		686
		687	A large scrollback buffer is essential. Really.
		688
		689	URxvt.mapAlert: true
		690
		691	The only case I use it is for my IRC window, which I like to keep
		692	iconified till people msg me (which beeps).
		693
		694	URxvt.visualBell: true
		695
		696	The audible bell is often annoying, especially when in a crowd.
		697
		698	URxvt.insecure: true
		699
		700	Please don't hack my mutt! Ooops...
		701
		702	URxvt.pastableTabs: false
		703
		704	I once thought this is a great idea.
		705
		706	urxvt.font: 9x15bold,\
		707	-misc-fixed-bold-r-normal--15-140-75-75-c-90-iso10646-1,\
		708	-misc-fixed-medium-r-normal--15-140-75-75-c-90-iso10646-1, \
		709	[codeset=JISX0208]xft:Kochi Gothic, \
		710	xft:Bitstream Vera Sans Mono:autohint=true, \
		711	xft:Code2000:antialias=false
		712	urxvt.boldFont: -xos4-terminus-bold-r-normal--14-140-72-72-c-80-iso8859-15
		713	urxvt.italicFont: xft:Bitstream Vera Sans Mono:italic:autohint=true
		714	urxvt.boldItalicFont: xft:Bitstream Vera Sans Mono:bold:italic:autohint=true
		715
		716	I wrote rxvt-unicode to be able to specify fonts exactly. So don't be
		717	overwhelmed. A special note: the "9x15bold" mentioned above is actually
		718	the version from XFree-3.3, as XFree-4 replaced it by a totally
		719	different font (different glyphs for ";" and many other harmless
		720	characters), while the second font is actually the "9x15bold" from
		721	XFree4/XOrg. The bold version has less chars than the medium version, so
		722	I use it for rare characters, too. When editing sources with vim, I use
		723	italic for comments and other stuff, which looks quite good with
		724	Bitstream Vera anti-aliased.
		725
		726	Terminus is a quite bad font (many very wrong glyphs), but for most of
		727	my purposes, it works, and gives a different look, as my normal
		728	(Non-bold) font is already bold, and I want to see a difference between
		729	bold and normal fonts.
		730
		731	Please note that I used the "urxvt" instance name and not the "URxvt"
		732	class name. That is because I use different configs for different
		733	purposes, for example, my IRC window is started with "-name IRC", and
		734	uses these defaults:
		735
		736	IRC*title: IRC
		737	IRC*geometry: 87x12+535+542
		738	IRC*saveLines: 0
		739	IRC*mapAlert: true
		740	IRC*font: suxuseuro
		741	IRC*boldFont: suxuseuro
		742	IRC*colorBD: white
		743	IRC*keysym.M-C-1: command:\033]710;suxuseuro\007\033]711;suxuseuro\007
		744	IRC*keysym.M-C-2: command:\033]710;9x15bold\007\033]711;9x15bold\007
		745
		746	"Alt-Ctrl-1" and "Alt-Ctrl-2" switch between two different font sizes.
		747	"suxuseuro" allows me to keep an eye (and actually read) stuff while
		748	keeping a very small window. If somebody pastes something complicated
		749	(e.g. japanese), I temporarily switch to a larger font.
		750
		751	The above is all in my ".Xdefaults" (I don't use ".Xresources" nor
		752	"xrdb"). I also have some resources in a separate ".Xdefaults-hostname"
		753	file for different hosts, for example, on my main desktop, I use:
		754
		755	URxvt.keysym.C-M-q: command:\033[3;5;5t
		756	URxvt.keysym.C-M-y: command:\033[3;5;606t
		757	URxvt.keysym.C-M-e: command:\033[3;1605;5t
		758	URxvt.keysym.C-M-c: command:\033[3;1605;606t
		759	URxvt.keysym.C-M-p: perl:test
		760
		761	The first for keysym definitions allow me to quickly bring some windows
		762	in the layout I like most. Ion users might start laughing but will stop
		763	immediately when I tell them that I use my own Fvwm2 module for much the
		764	same effect as Ion provides, and I only very rarely use the above key
		765	combinations :->
		766
		767	Why doesn't rxvt-unicode read my resources?
		768	Well, why, indeed? It does, in a way very similar to other X
		769	applications. Most importantly, this means that if you or your OS loads
		770	resources into the X display (the right way to do it), rxvt-unicode will
		771	ignore any resource files in your home directory. It will only read
		772	$HOME/.Xdefaults when no resources are attached to the display.
		773
		774	If you have or use an $HOME/.Xresources file, chances are that resources
		775	are loaded into your X-server. In this case, you have to re-login after
		776	every change (or run xrdb -merge $HOME/.Xresources).
		777
		778	Also consider the form resources have to use:
		779
		780	URxvt.resource: value
		781
		782	If you want to use another form (there are lots of different ways of
		783	specifying resources), make sure you understand whether and why it
		784	works. If unsure, use the form above.
		785
195	When I log-in to another system it tells me about missing terminfo data?	786	When I log-in to another system it tells me about missing terminfo data?
196	The terminal description used by rxvt-unicode is not as widely	787	The terminal description used by rxvt-unicode is not as widely available
197	available as that for xterm, or even rxvt (for which the same	788	as that for xterm, or even rxvt (for which the same problem often
198	problem often arises).	789	arises).
199		790
200	The correct solution for this problem is to install the terminfo,	791	The correct solution for this problem is to install the terminfo, this
201	this can be done like this (with ncurses' infocmp):	792	can be done by simply installing rxvt-unicode on the remote system as
		793	well (in case you have a nice package manager ready), or you can install
		794	the terminfo database manually like this (with ncurses infocmp. works as
		795	user and root):
202		796
203	REMOTE=remotesystem.domain	797	REMOTE=remotesystem.domain
204	infocmp rxvt-unicode \| ssh $REMOTE "cat >/tmp/ti && tic /tmp/ti"	798	infocmp rxvt-unicode \| ssh $REMOTE "mkdir -p .terminfo && cat >/tmp/ti && tic /tmp/ti"
205		799
206	... or by installing rxvt-unicode normally on the remote system,	800	One some systems you might need to set $TERMINFO to the full path of
		801	$HOME/.terminfo for this to work.
207		802
208	If you cannot or do not want to do this, then you can simply set	803	If you cannot or do not want to do this, then you can simply set
209	"TERM=rxvt" or even "TERM=xterm", and live with the small number of	804	"TERM=rxvt" or even "TERM=xterm", and live with the small number of
210	problems arising, which includes wrong keymapping, less and	805	problems arising, which includes wrong keymapping, less and different
211	different colours and some refresh errors in fullscreen	806	colours and some refresh errors in fullscreen applications. It's a nice
212	applications. It's a nice quick-and-dirty workaround for rare cases,	807	quick-and-dirty workaround for rare cases, though.
213	though.
214		808
215	If you always want to do this (and are fine with the consequences)	809	If you always want to do this (and are fine with the consequences) you
216	you can either recompile rxvt-unicode with the desired TERM value or	810	can either recompile rxvt-unicode with the desired TERM value or use a
217	use a resource to set it:	811	resource to set it:
218		812
219	URxvt.termName: rxvt	813	URxvt.termName: rxvt
220		814
221	If you don't plan to use rxvt (quite common...) you could also	815	If you don't plan to use rxvt (quite common...) you could also replace
222	replace the rxvt terminfo file with the rxvt-unicode one.	816	the rxvt terminfo file with the rxvt-unicode one and use "TERM=rxvt".
223		817
		818	nano fails with "Error opening terminal: rxvt-unicode"
		819	This exceptionally confusing and useless error message is printed by
		820	nano when it can't find the terminfo database. Nothing is wrong with
		821	your terminal, read the previous answer for a solution.
		822
224	"tic" outputs some error when compiling the terminfo entry.	823	"tic" outputs some error when compiling the terminfo entry.
225	Most likely it's the empty definition for "enacs=". Just replace it	824	Most likely it's the empty definition for "enacs=". Just replace it by
226	by "enacs=\E[0@" and try again.	825	"enacs=\E[0@" and try again.
227		826
228	"bash"'s readline does not work correctly under rxvt.	827	"bash"'s readline does not work correctly under urxvt.
		828	See next entry.
		829
229	I need a termcap file entry.	830	I need a termcap file entry.
230	One reason you might want this is that some distributions or	831	One reason you might want this is that some distributions or operating
231	operating systems still compile some programs using the	832	systems still compile some programs using the long-obsoleted termcap
232	long-obsoleted termcap library (Fedora Core's bash is one example)	833	library (Fedora's bash is one example) and rely on a termcap entry for
233	and rely on a termcap entry for "rxvt-unicode".	834	"rxvt-unicode".
234		835
235	You could use rxvt's termcap entry with resonable results in many	836	You could use rxvt's termcap entry with reasonable results in many
236	cases. You can also create a termcap entry by using terminfo's	837	cases. You can also create a termcap entry by using terminfo's infocmp
237	infocmp program like this:	838	program like this:
238		839
239	infocmp -C rxvt-unicode	840	infocmp -C rxvt-unicode
240		841
241	Or you could use this termcap entry, generated by the command above:	842	Or you could use the termcap entry in doc/etc/rxvt-unicode.termcap,
		843	generated by the command above.
242		844
243	rxvt-unicode\|rxvt-unicode terminal (X Window System):\
244	:am:bw:eo:km:mi:ms:xn:xo:\
245	:co#80:it#8:li#24:lm#0:\
246	:AL=\E[%dL:DC=\E[%dP:DL=\E[%dM:DO=\E[%dB:IC=\E[%d@:\
247	:K1=\EOw:K2=\EOu:K3=\EOy:K4=\EOq:K5=\EOs:LE=\E[%dD:\
248	:RI=\E[%dC:SF=\E[%dS:SR=\E[%dT:UP=\E[%dA:ae=\E(B:al=\E[L:\
249	:as=\E(0:bl=^G:cd=\E[J:ce=\E[K:cl=\E[H\E[2J:\
250	:cm=\E[%i%d;%dH:cr=^M:cs=\E[%i%d;%dr:ct=\E[3g:dc=\E[P:\
251	:dl=\E[M:do=^J:ec=\E[%dX:ei=\E[4l:ho=\E[H:\
252	:i1=\E[?47l\E=\E[?1l:ic=\E[@:im=\E[4h:\
253	:is=\E[r\E[m\E[2J\E[H\E[?7h\E[?1;3;4;6l\E[4l:\
254	:k1=\E[11~:k2=\E[12~:k3=\E[13~:k4=\E[14~:k5=\E[15~:\
255	:k6=\E[17~:k7=\E[18~:k8=\E[19~:k9=\E[20~:kD=\E[3~:\
256	:kI=\E[2~:kN=\E[6~:kP=\E[5~:kb=\177:kd=\EOB:ke=\E[?1l\E>:\
257	:kh=\E[7~:kl=\EOD:kr=\EOC:ks=\E[?1h\E=:ku=\EOA:le=^H:\
258	:mb=\E[5m:md=\E[1m:me=\E[m\017:mr=\E[7m:nd=\E[C:rc=\E8:\
259	:sc=\E7:se=\E[27m:sf=^J:so=\E[7m:sr=\EM:st=\EH:ta=^I:\
260	:te=\E[r\E[?1049l:ti=\E[?1049h:ue=\E[24m:up=\E[A:\
261	:us=\E[4m:vb=\E[?5h\E[?5l:ve=\E[?25h:vi=\E[?25l:\
262	:vs=\E[?25h:
263
264	Why does "ls" no longer have coloured output?	845	Why does "ls" no longer have coloured output?
265	The "ls" in the GNU coreutils unfortunately doesn't use terminfo to	846	The "ls" in the GNU coreutils unfortunately doesn't use terminfo to
266	decide wether a terminal has colour, but uses it's own configuration	847	decide whether a terminal has colour, but uses its own configuration
267	file. Needless to say, "rxvt-unicode" is not in it's default file	848	file. Needless to say, "rxvt-unicode" is not in its default file (among
268	(among with most other terminals supporting colour). Either add:	849	with most other terminals supporting colour). Either add:
269		850
270	TERM rxvt-unicode	851	TERM rxvt-unicode
271		852
272	to "/etc/DIR_COLORS" or simply add:	853	to "/etc/DIR_COLORS" or simply add:
273		854
274	alias ls='ls --color=auto'	855	alias ls='ls --color=auto'
275		856
276	to your ".profile" or ".bashrc".	857	to your ".profile" or ".bashrc".
277		858
278	Why doesn't vim/emacs etc. use the 88 colour mode?	859	Why doesn't vim/emacs etc. use the 88 colour mode?
		860	See next entry.
		861
279	Why doesn't vim/emacs etc. make use of italic?	862	Why doesn't vim/emacs etc. make use of italic?
		863	See next entry.
		864
280	Why are the secondary screen-related options not working properly?	865	Why are the secondary screen-related options not working properly?
281	Make sure you are using "TERM=rxvt-unicode". Some pre-packaged	866	Make sure you are using "TERM=rxvt-unicode". Some pre-packaged
282	distributions (most notably Debian GNU/Linux) break rxvt-unicode by	867	distributions break rxvt-unicode by setting "TERM" to "rxvt", which
283	setting "TERM" to "rxvt", which doesn't have these extra features.	868	doesn't have these extra features. Unfortunately, some of these
284	Unfortunately, some of these (most notably, again, Debian GNU/Linux)
285	furthermore fail to even install the "rxvt-unicode" terminfo file,	869	furthermore fail to even install the "rxvt-unicode" terminfo file, so
286	so you will need to install it on your own (See the question When I	870	you will need to install it on your own (See the question When I log-in
287	log-in to another system it tells me about missing terminfo data? on	871	to another system it tells me about missing terminfo data? on how to do
288	how to do this).	872	this).
289		873
290	My numerical keypad acts weird and generates differing output?	874	Encoding / Locale / Input Method Issues
291	Some Debian GNUL/Linux users seem to have this problem, although no
292	specific details were reported so far. It is possible that this is
293	caused by the wrong "TERM" setting, although the details of wether
294	and how this can happen are unknown, as "TERM=rxvt" should offer a
295	compatible keymap. See the answer to the previous question, and
296	please report if that helped.
297
298	Rxvt-unicode does not seem to understand the selected encoding?	875	Rxvt-unicode does not seem to understand the selected encoding?
		876	See next entry.
		877
299	Unicode does not seem to work?	878	Unicode does not seem to work?
300	If you encounter strange problems like typing an accented character	879	If you encounter strange problems like typing an accented character but
301	but getting two unrelated other characters or similar, or if program	880	getting two unrelated other characters or similar, or if program output
302	output is subtly garbled, then you should check your locale	881	is subtly garbled, then you should check your locale settings.
303	settings.
304		882
305	Rxvt-unicode must be started with the same "LC_CTYPE" setting as the	883	Rxvt-unicode must be started with the same "LC_CTYPE" setting as the
306	programs. Often rxvt-unicode is started in the "C" locale, while the	884	programs running in it. Often rxvt-unicode is started in the "C" locale,
307	login script running within the rxvt-unicode window changes the	885	while the login script running within the rxvt-unicode window changes
308	locale to something else, e.g. "en_GB.UTF-8". Needless to say, this	886	the locale to something else, e.g. "en_GB.UTF-8". Needless to say, this
309	is not going to work.	887	is not going to work, and is the most common cause for problems.
310		888
311	The best thing is to fix your startup environment, as you will	889	The best thing is to fix your startup environment, as you will likely
312	likely run into other problems. If nothing works you can try this in	890	run into other problems. If nothing works you can try this in your
313	your .profile.	891	.profile.
314		892
315	printf '\e]701;%s\007' "$LC_CTYPE"	893	printf '\33]701;%s\007' "$LC_CTYPE" # $LANG or $LC_ALL are worth a try, too
316		894
317	If this doesn't work, then maybe you use a "LC_CTYPE" specification	895	If this doesn't work, then maybe you use a "LC_CTYPE" specification not
318	not supported on your systems. Some systems have a "locale" command	896	supported on your systems. Some systems have a "locale" command which
319	which displays this (also, "perl -e0" can be used to check locale	897	displays this (also, "perl -e0" can be used to check locale settings, as
320	settings, as it will complain loudly if it cannot set the locale).	898	it will complain loudly if it cannot set the locale). If it displays
321	If it displays something like:	899	something like:
322		900
323	locale: Cannot set LC_CTYPE to default locale: ...	901	locale: Cannot set LC_CTYPE to default locale: ...
324		902
325	Then the locale you specified is not supported on your system.	903	Then the locale you specified is not supported on your system.
326		904
327	If nothing works and you are sure that everything is set correctly	905	If nothing works and you are sure that everything is set correctly then
328	then you will need to remember a little known fact: Some programs	906	you will need to remember a little known fact: Some programs just don't
329	just don't support locales :(	907	support locales :(
330		908
331	Why do some characters look so much different than others?
332	How does rxvt-unicode choose fonts?
333	Most fonts do not contain the full range of Unicode, which is fine.
334	Chances are that the font you (or the admin/package maintainer of
335	your system/os) have specified does not cover all the characters you
336	want to display.
337
338	rxvt-unicode makes a best-effort try at finding a replacement font.
339	Often the result is fine, but sometimes the chosen font looks
340	bad/ugly/wrong. Some fonts have totally strange characters that
341	don't resemble the correct glyph at all, and rxvt-unicode lacks the
342	artificial intelligence to detect that a specific glyph is wrong: it
343	has to believe the font that the characters it claims to contain
344	indeed look correct.
345
346	In that case, select a font of your taste and add it to the font
347	list, e.g.:
348
349	rxvt -fn basefont,font2,font3...
350
351	When rxvt-unicode sees a character, it will first look at the base
352	font. If the base font does not contain the character, it will go to
353	the next font, and so on. Specifying your own fonts will also speed
354	up this search and use less resources within rxvt-unicode and the
355	X-server.
356
357	The only limitation is that none of the fonts may be larger than the
358	base font, as the base font defines the terminal character cell
359	size, which must be the same due to the way terminals work.
360
361	Why do some chinese characters look so different than others?
362	This is because there is a difference between script and language --
363	rxvt-unicode does not know which language the text that is output
364	is, as it only knows the unicode character codes. If rxvt-unicode
365	first sees a japanese/chinese character, it might choose a japanese
366	font for display. Subsequent japanese characters will use that font.
367	Now, many chinese characters aren't represented in japanese fonts,
368	so when the first non-japanese character comes up, rxvt-unicode will
369	look for a chinese font -- unfortunately at this point, it will
370	still use the japanese font for chinese characters that are also in
371	the japanese font.
372
373	The workaround is easy: just tag a chinese font at the end of your
374	font list (see the previous question). The key is to view the font
375	list as a preference list: If you expect more japanese, list a
376	japanese font first. If you expect more chinese, put a chinese font
377	first.
378
379	In the future it might be possible to switch language preferences at
380	runtime (the internal data structure has no problem with using
381	different fonts for the same character at the same time, but no
382	interface for this has been designed yet).
383
384	Until then, you might get away with switching fonts at runtime (see
385	"Can I switch the fonts at runtime?" later in this document).
386
387	Why does rxvt-unicode sometimes leave pixel droppings?
388	Most fonts were not designed for terminal use, which means that
389	character size varies a lot. A font that is otherwise fine for
390	terminal use might contain some characters that are simply too wide.
391	Rxvt-unicode will avoid these characters. For characters that are
392	just "a bit" too wide a special "careful" rendering mode is used
393	that redraws adjacent characters.
394
395	All of this requires that fonts do not lie about character sizes,
396	however: Xft fonts often draw glyphs larger than their acclaimed
397	bounding box, and rxvt-unicode has no way of detecting this (the
398	correct way is to ask for the character bounding box, which
399	unfortunately is wrong in these cases).
400
401	It's not clear (to me at least), wether this is a bug in Xft,
402	freetype, or the respective font. If you encounter this problem you
403	might try using the "-lsp" option to give the font more height. If
404	that doesn't work, you might be forced to use a different font.
405
406	All of this is not a problem when using X11 core fonts, as their
407	bounding box data is correct.
408
409	On Solaris 9, many line-drawing characters are too wide.
410	Seems to be a known bug, read
411	<http://nixdoc.net/files/forum/about34198.html>. Some people use the
412	following ugly workaround to get non-double-wide-characters working:
413
414	#define wcwidth(x) wcwidth(x) > 1 ? 1 : wcwidth(x)
415
416	My Compose (Multi_key) key is no longer working.
417	The most common causes for this are that either your locale is not
418	set correctly, or you specified a preeditStyle that is not supported
419	by your input method. For example, if you specified OverTheSpot and
420	your input method (e.g. the default input method handling Compose
421	keys) does not support this (for instance because it is not visual),
422	then rxvt-unicode will continue without an input method.
423
424	In this case either do not specify a preeditStyle or specify more
425	than one pre-edit style, such as OverTheSpot,Root,None.
426
427	I cannot type "Ctrl-Shift-2" to get an ASCII NUL character due to ISO
428	14755
429	Either try "Ctrl-2" alone (it often is mapped to ASCII NUL even on
430	international keyboards) or simply use ISO 14755 support to your
431	advantage, typing <Ctrl-Shift-0> to get a ASCII NUL. This works for
432	other codes, too, such as "Ctrl-Shift-1-d" to type the default
433	telnet escape character and so on.
434
435	How can I keep rxvt-unicode from using reverse video so much?
436	First of all, make sure you are running with the right terminal
437	settings ("TERM=rxvt-unicode"), which will get rid of most of these
438	effects. Then make sure you have specified colours for italic and
439	bold, as otherwise rxvt-unicode might use reverse video to simulate
440	the effect:
441
442	URxvt.colorBD: white
443	URxvt.colorIT: green
444
445	Some programs assume totally weird colours (red instead of blue), how
446	can I fix that?
447	For some unexplainable reason, some rare programs assume a very
448	weird colour palette when confronted with a terminal with more than
449	the standard 8 colours (rxvt-unicode supports 88). The right fix is,
450	of course, to fix these programs not to assume non-ISO colours
451	without very good reasons.
452
453	In the meantime, you can either edit your "rxvt-unicode" terminfo
454	definition to only claim 8 colour support or use "TERM=rxvt", which
455	will fix colours but keep you from using other rxvt-unicode
456	features.
457
458	I am on FreeBSD and rxvt-unicode does not seem to work at all.
459	Rxvt-unicode requires the symbol "__STDC_ISO_10646__" to be defined
460	in your compile environment, or an implementation that implements
461	it, wether it defines the symbol or not. "__STDC_ISO_10646__"
462	requires that wchar_t is represented as unicode.
463
464	As you might have guessed, FreeBSD does neither define this symobl
465	nor does it support it. Instead, it uses it's own internal
466	representation of wchar_t. This is, of course, completely fine with
467	respect to standards.
468
469	However, that means rxvt-unicode only works in "POSIX", "ISO-8859-1"
470	and "UTF-8" locales under FreeBSD (which all use Unicode as wchar_t.
471
472	"__STDC_ISO_10646__" is the only sane way to support multi-language
473	apps in an OS, as using a locale-dependent (and non-standardized)
474	representation of wchar_t makes it impossible to convert between
475	wchar_t (as used by X11 and your applications) and any other
476	encoding without implementing OS-specific-wrappers for each and
477	every locale. There simply are no APIs to convert wchar_t into
478	anything except the current locale encoding.
479
480	Some applications (such as the formidable mlterm) work around this
481	by carrying their own replacement functions for character set
482	handling with them, and either implementing OS-dependent hacks or
483	doing multiple conversions (which is slow and unreliable in case the
484	OS implements encodings slightly different than the terminal
485	emulator).
486
487	The rxvt-unicode author insists that the right way to fix this is in
488	the system libraries once and for all, instead of forcing every app
489	to carry complete replacements for them :)
490
491	I use Solaris 9 and it doesn't compile/work/etc.
492	Try the diff in doc/solaris9.patch as a base. It fixes the worst
493	problems with "wcwidth" and a compile problem.
494
495	How can I use rxvt-unicode under cygwin?
496	rxvt-unicode should compile and run out of the box on cygwin, using
497	the X11 libraries that come with cygwin. libW11 emulation is no
498	longer supported (and makes no sense, either, as it only supported a
499	single font). I recommend starting the X-server in "-multiwindow" or
500	"-rootless" mode instead, which will result in similar look&feel as
501	the old libW11 emulation.
502
503	At the time of this writing, cygwin didn't seem to support any
504	multi-byte encodings (you might try "LC_CTYPE=C-UTF-8"), so you are
505	likely limited to 8-bit encodings.
506
507	How does rxvt-unicode determine the encoding to use?	909	How does rxvt-unicode determine the encoding to use?
		910	See next entry.
		911
508	Is there an option to switch encodings?	912	Is there an option to switch encodings?
509	Unlike some other terminals, rxvt-unicode has no encoding switch,	913	Unlike some other terminals, rxvt-unicode has no encoding switch, and no
510	and no specific "utf-8" mode, such as xterm. In fact, it doesn't	914	specific "utf-8" mode, such as xterm. In fact, it doesn't even know
511	even know about UTF-8 or any other encodings with respect to	915	about UTF-8 or any other encodings with respect to terminal I/O.
512	terminal I/O.
513		916
514	The reasons is that there exists a perfectly fine mechanism for	917	The reasons is that there exists a perfectly fine mechanism for
515	selecting the encoding, doing I/O and (most important) communicating	918	selecting the encoding, doing I/O and (most important) communicating
516	this to all applications so everybody agrees on character properties	919	this to all applications so everybody agrees on character properties
517	such as width and code number. This mechanism is the locale.	920	such as width and code number. This mechanism is the locale.
518	Applications not using that info will have problems (for example,	921	Applications not using that info will have problems (for example,
519	"xterm" gets the width of characters wrong as it uses it's own,	922	"xterm" gets the width of characters wrong as it uses its own,
520	locale-independent table under all locales).	923	locale-independent table under all locales).
521		924
522	Rxvt-unicode uses the "LC_CTYPE" locale category to select encoding.	925	Rxvt-unicode uses the "LC_CTYPE" locale category to select encoding. All
523	All programs doing the same (that is, most) will automatically agree	926	programs doing the same (that is, most) will automatically agree in the
524	in the interpretation of characters.	927	interpretation of characters.
525		928
526	Unfortunately, there is no system-independent way to select locales,	929	Unfortunately, there is no system-independent way to select locales, nor
527	nor is there a standard on how locale specifiers will look like.	930	is there a standard on how locale specifiers will look like.
528		931
529	On most systems, the content of the "LC_CTYPE" environment variable	932	On most systems, the content of the "LC_CTYPE" environment variable
530	contains an arbitrary string which corresponds to an	933	contains an arbitrary string which corresponds to an already-installed
531	already-installed locale. Common names for locales are	934	locale. Common names for locales are "en_US.UTF-8", "de_DE.ISO-8859-15",
532	"en_US.UTF-8", "de_DE.ISO-8859-15", "ja_JP.EUC-JP", i.e.	935	"ja_JP.EUC-JP", i.e. "language_country.encoding", but other forms (i.e.
533	"language_country.encoding", but other forms (i.e. "de" or "german")	936	"de" or "german") are also common.
534	are also common.
535		937
536	Rxvt-unicode ignores all other locale categories, and except for the	938	Rxvt-unicode ignores all other locale categories, and except for the
537	encoding, ignores country or language-specific settings, i.e.	939	encoding, ignores country or language-specific settings, i.e.
538	"de_DE.UTF-8" and "ja_JP.UTF-8" are the normally same to	940	"de_DE.UTF-8" and "ja_JP.UTF-8" are the normally same to rxvt-unicode.
539	rxvt-unicode.
540		941
541	If you want to use a specific encoding you have to make sure you	942	If you want to use a specific encoding you have to make sure you start
542	start rxvt-unicode with the correct "LC_CTYPE" category.	943	rxvt-unicode with the correct "LC_CTYPE" category.
543		944
544	Can I switch locales at runtime?	945	Can I switch locales at runtime?
545	Yes, using an escape sequence. Try something like this, which sets	946	Yes, using an escape sequence. Try something like this, which sets
546	rxvt-unicode's idea of "LC_CTYPE".	947	rxvt-unicode's idea of "LC_CTYPE".
547		948
548	printf '\e]701;%s\007' ja_JP.SJIS	949	printf '\33]701;%s\007' ja_JP.SJIS
549		950
550	See also the previous answer.	951	See also the previous answer.
551		952
552	Sometimes this capability is rather handy when you want to work in	953	Sometimes this capability is rather handy when you want to work in one
553	one locale (e.g. "de_DE.UTF-8") but some programs don't support it	954	locale (e.g. "de_DE.UTF-8") but some programs don't support it (e.g.
554	(e.g. UTF-8). For example, I use this script to start "xjdic", which	955	UTF-8). For example, I use this script to start "xjdic", which first
555	first switches to a locale supported by xjdic and back later:	956	switches to a locale supported by xjdic and back later:
556		957
557	printf '\e]701;%s\007' ja_JP.SJIS	958	printf '\33]701;%s\007' ja_JP.SJIS
558	xjdic -js	959	xjdic -js
559	printf '\e]701;%s\007' de_DE.UTF-8	960	printf '\33]701;%s\007' de_DE.UTF-8
560		961
561	You can also use xterm's "luit" program, which usually works fine,	962	You can also use xterm's "luit" program, which usually works fine,
562	except for some locales where character width differs between	963	except for some locales where character width differs between program-
563	program- and rxvt-unicode-locales.	964	and rxvt-unicode-locales.
564		965
565	Can I switch the fonts at runtime?	966	I have problems getting my input method working.
566	Yes, using an escape sequence. Try something like this, which has	967	Try a search engine, as this is slightly different for every input
567	the same effect as using the "-fn" switch, and takes effect	968	method server.
568	immediately:
569		969
570	printf '\e]50;%s\007' "9x15bold,xft:Kochi Gothic"	970	Here is a checklist:
571		971
572	This is useful if you e.g. work primarily with japanese (and prefer	972	- Make sure your locale and the imLocale are supported on your OS.
573	a japanese font), but you have to switch to chinese temporarily,	973	Try "locale -a" or check the documentation for your OS.
574	where japanese fonts would only be in your way.
575		974
576	You can think of this as a kind of manual ISO-2022 switching.	975	- Make sure your locale or imLocale matches a locale supported by your
		976	XIM.
		977	For example, kinput2 does not support UTF-8 locales, you should use
		978	"ja_JP.EUC-JP" or equivalent.
577		979
578	Why do italic characters look as if clipped?	980	- Make sure your XIM server is actually running.
579	Many fonts have difficulties with italic characters and hinting. For	981	- Make sure the "XMODIFIERS" environment variable is set correctly when
580	example, the otherwise very nicely hinted font "xft:Bitstream Vera	982	starting rxvt-unicode.
581	Sans Mono" completely fails in it's italic face. A workaround might	983	When you want to use e.g. kinput2, it must be set to "@im=kinput2".
582	be to enable freetype autohinting, i.e. like this:	984	For scim, use "@im=SCIM". You can see what input method servers are
		985	running with this command:
583		986
584	URxvt.italicFont: xft:Bitstream Vera Sans Mono:italic:autohint=true	987	xprop -root XIM_SERVERS
585	URxvt.boldItalicFont: xft:Bitstream Vera Sans Mono:bold:italic:autohint=true
586		988
587	My input method wants <some encoding> but I want UTF-8, what can I do?	989	My input method wants <some encoding> but I want UTF-8, what can I do?
588	You can specify separate locales for the input method and the rest	990	You can specify separate locales for the input method and the rest of
589	of the terminal, using the resource "imlocale":	991	the terminal, using the resource "imlocale":
590		992
591	URxvt.imlocale: ja_JP.EUC-JP	993	URxvt.imlocale: ja_JP.EUC-JP
592		994
593	Now you can start your terminal with "LC_CTYPE=ja_JP.UTF-8" and	995	Now you can start your terminal with "LC_CTYPE=ja_JP.UTF-8" and still
594	still use your input method. Please note, however, that you will not	996	use your input method. Please note, however, that, depending on your
595	be able to input characters outside "EUC-JP" in a normal way then,	997	Xlib version, you may not be able to input characters outside "EUC-JP"
596	as your input method limits you.	998	in a normal way then, as your input method limits you.
597		999
598	Rxvt-unicode crashes when the X Input Method changes or exits.	1000	Rxvt-unicode crashes when the X Input Method changes or exits.
599	Unfortunately, this is unavoidable, as the XIM protocol is racy by	1001	Unfortunately, this is unavoidable, as the XIM protocol is racy by
600	design. Applications can avoid some crashes at the expense of memory	1002	design. Applications can avoid some crashes at the expense of memory
601	leaks, and Input Methods can avoid some crashes by careful ordering	1003	leaks, and Input Methods can avoid some crashes by careful ordering at
602	at exit time. kinput2 (and derived input methods) generally	1004	exit time. kinput2 (and derived input methods) generally succeeds, while
603	succeeds, while SCIM (or similar input methods) fails. In the end,	1005	SCIM (or similar input methods) fails. In the end, however, crashes
604	however, crashes cannot be completely avoided even if both sides	1006	cannot be completely avoided even if both sides cooperate.
605	cooperate.
606		1007
607	So the only workaround is not to kill your Input Method Servers.	1008	So the only workaround is not to kill your Input Method Servers.
608		1009
609	Rxvt-unicode uses gobs of memory, how can I reduce that?	1010	Operating Systems / Package Maintaining
610	Rxvt-unicode tries to obey the rule of not charging you for	1011	I am maintaining rxvt-unicode for distribution/OS XXX, any recommendation?
611	something you don't use. One thing you should try is to configure	1012	You should build one binary with the default options. configure now
612	out all settings that you don't need, for example, Xft support is a	1013	enables most useful options, and the trend goes to making them
613	resource hog by design, when used. Compiling it out ensures that no	1014	runtime-switchable, too, so there is usually no drawback to enabling
614	Xft font will be loaded accidentally when rxvt-unicode tries to find	1015	them, except higher disk and possibly memory usage. The perl interpreter
615	a font for your characters.	1016	should be enabled, as important functionality (menus, selection, likely
		1017	more in the future) depends on it.
616		1018
617	Also, many people (me included) like large windows and even larger	1019	You should not overwrite the "perl-ext-common" and "perl-ext" resources
618	scrollback buffers: Without "--enable-unicode3", rxvt-unicode will	1020	system-wide (except maybe with "defaults"). This will result in useful
619	use 6 bytes per screen cell. For a 160x?? window this amounts to	1021	behaviour. If your distribution aims at low memory, add an empty
620	almost a kilobyte per line. A scrollback buffer of 10000 lines will	1022	"perl-ext-common" resource to the app-defaults file. This will keep the
621	then (if full) use 10 Megabytes of memory. With "--enable-unicode3"	1023	perl interpreter disabled until the user enables it.
622	it gets worse, as rxvt-unicode then uses 8 bytes per screen cell.
623		1024
624	Can I speed up Xft rendering somehow?	1025	If you can/want build more binaries, I recommend building a minimal one
625	Yes, the most obvious way to speed it up is to avoid Xft entirely,	1026	with "--disable-everything" (very useful) and a maximal one with
626	as it is simply slow. If you still want Xft fonts you might try to	1027	"--enable-everything" (less useful, it will be very big due to a lot of
627	disable antialiasing (by appending ":antialias=false"), which saves	1028	encodings built-in that increase download times and are rarely used).
628	lots of memory and also speeds up rendering considerably.
629		1029
630	Rxvt-unicode doesn't seem to anti-alias its fonts, what is wrong?	1030	I need to make it setuid/setgid to support utmp/ptys on my OS, is this safe?
631	Rxvt-unicode will use whatever you specify as a font. If it needs to	1031	It should be, starting with release 7.1. You are encouraged to properly
632	fall back to it's default font search list it will prefer X11 core	1032	install urxvt with privileges necessary for your OS now.
633	fonts, because they are small and fast, and then use Xft fonts. It
634	has antialiasing disabled for most of them, because the author
635	thinks they look best that way.
636		1033
637	If you want antialiasing, you have to specify the fonts manually.	1034	When rxvt-unicode detects that it runs setuid or setgid, it will fork
		1035	into a helper process for privileged operations (pty handling on some
		1036	systems, utmp/wtmp/lastlog handling on others) and drop privileges
		1037	immediately. This is much safer than most other terminals that keep
		1038	privileges while running (but is more relevant to urxvt, as it contains
		1039	things as perl interpreters, which might be "helpful" to attackers).
638		1040
639	Mouse cut/paste suddenly no longer works.	1041	This forking is done as the very first within main(), which is very
640	Make sure that mouse reporting is actually turned off since killing	1042	early and reduces possible bugs to initialisation code run before
641	some editors prematurely may leave the mouse in mouse report mode.	1043	main(), or things like the dynamic loader of your system, which should
642	I've heard that tcsh may use mouse reporting unless it otherwise	1044	result in very little risk.
643	specified. A quick check is to see if cut/paste works when the Alt
644	or Shift keys are depressed.
645		1045
646	What's with this bold/blink stuff?	1046	I am on FreeBSD and rxvt-unicode does not seem to work at all.
647	If no bold colour is set via "colorBD:", bold will invert text using	1047	Rxvt-unicode requires the symbol "__STDC_ISO_10646__" to be defined in
648	the standard foreground colour.	1048	your compile environment, or an implementation that implements it,
		1049	whether it defines the symbol or not. "__STDC_ISO_10646__" requires that
		1050	wchar_t is represented as unicode.
649		1051
650	For the standard background colour, blinking will actually make the	1052	As you might have guessed, FreeBSD does neither define this symbol nor
651	text blink when compiled with "--enable-blinking". with standard	1053	does it support it. Instead, it uses its own internal representation of
652	colours. Without "--enable-blinking", the blink attribute will be	1054	wchar_t. This is, of course, completely fine with respect to standards.
653	ignored.
654		1055
655	On ANSI colours, bold/blink attributes are used to set	1056	However, that means rxvt-unicode only works in "POSIX", "ISO-8859-1" and
656	high-intensity foreground/background colors.	1057	"UTF-8" locales under FreeBSD (which all use Unicode as wchar_t).
657		1058
658	color0-7 are the low-intensity colors.	1059	"__STDC_ISO_10646__" is the only sane way to support multi-language apps
		1060	in an OS, as using a locale-dependent (and non-standardized)
		1061	representation of wchar_t makes it impossible to convert between wchar_t
		1062	(as used by X11 and your applications) and any other encoding without
		1063	implementing OS-specific-wrappers for each and every locale. There
		1064	simply are no APIs to convert wchar_t into anything except the current
		1065	locale encoding.
659		1066
660	color8-15 are the corresponding high-intensity colors.	1067	Some applications (such as the formidable mlterm) work around this by
		1068	carrying their own replacement functions for character set handling with
		1069	them, and either implementing OS-dependent hacks or doing multiple
		1070	conversions (which is slow and unreliable in case the OS implements
		1071	encodings slightly different than the terminal emulator).
661		1072
662	I don't like the screen colors. How do I change them?	1073	The rxvt-unicode author insists that the right way to fix this is in the
663	You can change the screen colors at run-time using ~/.Xdefaults	1074	system libraries once and for all, instead of forcing every app to carry
664	resources (or as long-options).	1075	complete replacements for them :)
665		1076
666	Here are values that are supposed to resemble a VGA screen,	1077	How can I use rxvt-unicode under cygwin?
667	including the murky brown that passes for low-intensity yellow:	1078	rxvt-unicode should compile and run out of the box on cygwin, using the
		1079	X11 libraries that come with cygwin. libW11 emulation is no longer
		1080	supported (and makes no sense, either, as it only supported a single
		1081	font). I recommend starting the X-server in "-multiwindow" or
		1082	"-rootless" mode instead, which will result in similar look&feel as the
		1083	old libW11 emulation.
668		1084
669	URxvt.color0: #000000	1085	At the time of this writing, cygwin didn't seem to support any
670	URxvt.color1: #A80000	1086	multi-byte encodings (you might try "LC_CTYPE=C-UTF-8"), so you are
671	URxvt.color2: #00A800	1087	likely limited to 8-bit encodings.
672	URxvt.color3: #A8A800
673	URxvt.color4: #0000A8
674	URxvt.color5: #A800A8
675	URxvt.color6: #00A8A8
676	URxvt.color7: #A8A8A8
677		1088
678	URxvt.color8: #000054	1089	Character widths are not correct.
679	URxvt.color9: #FF0054	1090	urxvt uses the system wcwidth function to know the information about the
680	URxvt.color10: #00FF54	1091	width of characters, so on systems with incorrect locale data you will
681	URxvt.color11: #FFFF54	1092	likely get bad results. Two notorious examples are Solaris 9, where
682	URxvt.color12: #0000FF	1093	single-width characters like U+2514 are reported as double-width, and
683	URxvt.color13: #FF00FF	1094	Darwin 8, where combining chars are reported having width 1.
684	URxvt.color14: #00FFFF
685	URxvt.color15: #FFFFFF
686		1095
687	And here is a more complete set of non-standard colors described	1096	The solution is to upgrade your system or switch to a better one. A
688	(not by me) as "pretty girly".	1097	possibly working workaround is to use a wcwidth implementation like
689		1098
690	URxvt.cursorColor: #dc74d1	1099	http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
691	URxvt.pointerColor: #dc74d1
692	URxvt.background: #0e0e0e
693	URxvt.foreground: #4ad5e1
694	URxvt.color0: #000000
695	URxvt.color8: #8b8f93
696	URxvt.color1: #dc74d1
697	URxvt.color9: #dc74d1
698	URxvt.color2: #0eb8c7
699	URxvt.color10: #0eb8c7
700	URxvt.color3: #dfe37e
701	URxvt.color11: #dfe37e
702	URxvt.color5: #9e88f0
703	URxvt.color13: #9e88f0
704	URxvt.color6: #73f7ff
705	URxvt.color14: #73f7ff
706	URxvt.color7: #e1dddd
707	URxvt.color15: #e1dddd
708		1100
709	How can I start rxvtd in a race-free way?
710	Try "rxvtd -f -o", which tells rxvtd to open the display, create the
711	listening socket and then fork.
712
713	What's with the strange Backspace/Delete key behaviour?
714	Assuming that the physical Backspace key corresponds to the
715	BackSpace keysym (not likely for Linux ... see the following
716	question) there are two standard values that can be used for
717	Backspace: "^H" and "^?".
718
719	Historically, either value is correct, but rxvt-unicode adopts the
720	debian policy of using "^?" when unsure, because it's the one only
721	only correct choice :).
722
723	Rxvt-unicode tries to inherit the current stty settings and uses the
724	value of `erase' to guess the value for backspace. If rxvt-unicode
725	wasn't started from a terminal (say, from a menu or by remote
726	shell), then the system value of `erase', which corresponds to
727	CERASE in <termios.h>, will be used (which may not be the same as
728	your stty setting).
729
730	For starting a new rxvt-unicode:
731
732	# use Backspace = ^H
733	$ stty erase ^H
734	$ rxvt
735
736	# use Backspace = ^?
737	$ stty erase ^?
738	$ rxvt
739
740	Toggle with "ESC [ 36 h" / "ESC [ 36 l".
741
742	For an existing rxvt-unicode:
743
744	# use Backspace = ^H
745	$ stty erase ^H
746	$ echo -n "^[[36h"
747
748	# use Backspace = ^?
749	$ stty erase ^?
750	$ echo -n "^[[36l"
751
752	This helps satisfy some of the Backspace discrepancies that occur,
753	but if you use Backspace = "^H", make sure that the termcap/terminfo
754	value properly reflects that.
755
756	The Delete key is a another casualty of the ill-defined Backspace
757	problem. To avoid confusion between the Backspace and Delete keys,
758	the Delete key has been assigned an escape sequence to match the
759	vt100 for Execute ("ESC [ 3 ~") and is in the supplied
760	termcap/terminfo.
761
762	Some other Backspace problems:
763
764	some editors use termcap/terminfo, some editors (vim I'm told)
765	expect Backspace = ^H, GNU Emacs (and Emacs-like editors) use ^H for
766	help.
767
768	Perhaps someday this will all be resolved in a consistent manner.
769
770	I don't like the key-bindings. How do I change them?
771	There are some compile-time selections available via configure.
772	Unless you have run "configure" with the "--disable-resources"
773	option you can use the `keysym' resource to alter the keystrings
774	associated with keysyms.
775
776	Here's an example for a URxvt session started using "rxvt -name
777	URxvt"
778
779	URxvt.keysym.Home: \033[1~
780	URxvt.keysym.End: \033[4~
781	URxvt.keysym.C-apostrophe: \033<C-'>
782	URxvt.keysym.C-slash: \033<C-/>
783	URxvt.keysym.C-semicolon: \033<C-;>
784	URxvt.keysym.C-grave: \033<C-`>
785	URxvt.keysym.C-comma: \033<C-,>
786	URxvt.keysym.C-period: \033<C-.>
787	URxvt.keysym.C-0x60: \033<C-`>
788	URxvt.keysym.C-Tab: \033<C-Tab>
789	URxvt.keysym.C-Return: \033<C-Return>
790	URxvt.keysym.S-Return: \033<S-Return>
791	URxvt.keysym.S-space: \033<S-Space>
792	URxvt.keysym.M-Up: \033<M-Up>
793	URxvt.keysym.M-Down: \033<M-Down>
794	URxvt.keysym.M-Left: \033<M-Left>
795	URxvt.keysym.M-Right: \033<M-Right>
796	URxvt.keysym.M-C-0: list \033<M-C- 0123456789 >
797	URxvt.keysym.M-C-a: list \033<M-C- abcdefghijklmnopqrstuvwxyz >
798	URxvt.keysym.F12: command:\033]701;zh_CN.GBK\007
799
800	See some more examples in the documentation for the keysym resource.
801
802	I'm using keyboard model XXX that has extra Prior/Next/Insert keys. How
803	do I make use of them? For example, the Sun Keyboard type 4 has the
804	following mappings that rxvt-unicode doesn't recognize.
805	KP_Insert == Insert
806	F22 == Print
807	F27 == Home
808	F29 == Prior
809	F33 == End
810	F35 == Next
811
812	Rather than have rxvt-unicode try to accommodate all the various
813	possible keyboard mappings, it is better to use `xmodmap' to remap
814	the keys as required for your particular machine.
815
816	How do I distinguish wether I'm running rxvt-unicode or a regular xterm?
817	I need this to decide about setting colors etc.
818	rxvt and rxvt-unicode always export the variable "COLORTERM", so you
819	can check and see if that is set. Note that several programs, JED,
820	slrn, Midnight Commander automatically check this variable to decide
821	whether or not to use color.
822
823	How do I set the correct, full IP address for the DISPLAY variable?
824	If you've compiled rxvt-unicode with DISPLAY_IS_IP and have enabled
825	insecure mode then it is possible to use the following shell script
826	snippets to correctly set the display. If your version of
827	rxvt-unicode wasn't also compiled with ESCZ_ANSWER (as assumed in
828	these snippets) then the COLORTERM variable can be used to
829	distinguish rxvt-unicode from a regular xterm.
830
831	Courtesy of Chuck Blake <cblake@BBN.COM> with the following shell
832	script snippets:
833
834	# Bourne/Korn/POSIX family of shells:
835	[ ${TERM:-foo} = foo ] && TERM=xterm # assume an xterm if we don't know
836	if [ ${TERM:-foo} = xterm ]; then
837	stty -icanon -echo min 0 time 15 # see if enhanced rxvt or not
838	echo -n '^[Z'
839	read term_id
840	stty icanon echo
841	if [ ""${term_id} = '^[[?1;2C' -a ${DISPLAY:-foo} = foo ]; then
842	echo -n '^[[7n' # query the rxvt we are in for the DISPLAY string
843	read DISPLAY # set it in our local shell
844	fi
845	fi
846
847	How do I compile the manual pages for myself?
848	You need to have a recent version of perl installed as
849	/usr/bin/perl, one that comes with pod2man, pod2text and pod2html.
850	Then go to the doc subdirectory and enter "make alldoc".
851
852	My question isn't answered here, can I ask a human?
853	Before sending me mail, you could go to IRC: "irc.freenode.net",
854	channel "#rxvt-unicode" has some rxvt-unicode enthusiasts that might
855	be interested in learning about new and exciting problems (but not
856	FAQs :).
857

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Revision 1.72 by root, Sat May 14 08:28:25 2016 UTC