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uterm(1)		Unicode	terminal window	starter		      uterm(1)

NAME
       uterm - start script for	a Unicode capable terminal window

SYNTAX
       uterm [ -terminal-options ] [ -e	program	arguments ... ]

       uterm [ -rx | -rxvt ] [ -rxvt-options ] [ -e program arguments ... ]
       uterm [ -xt | -xterm ] [	-xterm-options ] [ -e program arguments	... ]

DESCRIPTION
       (Note: if there is no dotted line below,	use 8 bit terminal environment
       for proper display of manual page.)
       ......................................................

       Invoke a	terminal window	with a reasonably optimized range  of  Unicode
       support,	 enforcing  UTF-8 mode and using the best Unicode fonts	found.
       Many systems are	 not  yet  properly  configured	 to  enable  easy  and
       straight-forward	 use  of  Unicode  in a	text-mode terminal environment
       (such as	xterm or rxvt).	 The purpose of	uterm  is  to  help  users  to
       start a terminal	with good Unicode capabilities without much hassle.

   Terminal selection
       Either of xterm or rxvt-unicode is selected as the terminal application
       to start, depending on:

	      o	     Availability of rxvt-unicode: The script  checks  whether
		     rxvt-unicode  is  available under the name	urxvt (e.g. on
		     cygwin), or if rxvt is available, whether it actually  is
		     rxvt-unicode  (and	 not  an  older	version). Only if this
		     check is positive,	rxvt is	considered.

	      o	     User preference, implicit:	If  the	 environment  variable
		     TERM starts with "rxvt", rxvt-unicode is preferred.

	      o	     User  preference,	explicit: With the command line	option
		     -rx or -rxvt, rxvt-unicode	is  preferred.	 With  -xt  or
		     -xterm, xterm is preferred.

	      o	     Font  selection:  If the GNU unifont is selected, rxvt is
		     chosen.

	      o	     In	all other cases, xterm is chosen.
       Users of	mlterm are assumed to start mlterm themselves directly,	so ml-
       term  is	 not  considered.  Neither of KDE konsole or gnome-terminal is
       currently considered since they cannot be font-configured on-the-fly.

   Font	selection
       The uterm script	tries its best to use fonts that provide a maximum  of
       Unicode support.

	      o	     First  it checks if you have the 10x20 Unicode font and a
		     matching 20x20 double width font installed	(see  explana-
		     tion below	about CJK coverage).

	      o	     If	not, it	checks if you have the 9x18 Unicode font and a
		     matching 18x18 double width font installed	and uses them.

	      o	     If	both are not found, it tries to	invoke rxvt  with  the
		     GNU unifont.

	      o	     If	either GNU unifont or rxvt are not installed, efont is
		     tried.

	      o	     As	a last resort, it tries	to invoke xterm	with 6x13  and
		     12x13 fonts.

	      o	     As	 a  very last fallback,	it invokes xterm with its con-
		     figured default fonts.
       Note: The efonts	are installed on fewer	systems	 than  the  misc-fixed
       fonts  so only 1	size of	them is	considered and at a lower priority. If
       you prefer efont, you should configure xterm font usage yourself	(using
       X resource configuration) and invoke xterm directly.
       Note:  GNU  unifont  does  unfortunately	not work with xterm (or	rather
       xterm with GNU unifont),	so in this case	rxvt is	invoked.

	Information about font usage
       Font selection is a matter of both  taste  and  script  coverage.   The
       uterm  script uses fonts	with a good coverage of	Unicode	script ranges,
       but its order of	precedence may not suit	your specific needs.  In  that
       case you	should configure your exact desired font preference and	invoke
       the desired terminal  (xterm,  rxvt)  directly.	 Coverage  of  certain
       scripts would suggest certain font preferences:

	      o	     Korean Hangul: GNU	unifont

	      o	     Devanagari: efont

	      o	     Georgian: efont, misc X fonts

	      o	     (to be continued)

	CJK coverage and the 10x20 fonts
       Among  the  Unicode  "misc" X fonts (misc-fixed-...), the 20 pixel size
       fonts are much clearer in appearance than the 18	pixel fonts for	 which
       CJK  wide fonts (using double cell width	in a fixed-width terminal) are
       available.  Unfortunately, xterm	is not yet capable of padding an 18x18
       font  up	 to  20x20 pixel character cells for use together with a 10x20
       pixel font.  The	bdf18to20 script, packaged with	the mined editor  like
       uterm,  helps  with this	issue and generates the	missing	fonts from the
       18 pixel	double width fonts by padding blank pixels.  If	you  have  in-
       stalled	those,	uterm  will select 20 pixel fonts as its first prefer-
       ence.
       Note: 20x20 fonts (padded with bdf18to20) are already installed as part
       of the xterm package with SuSE Linux 10.0.
       Note:  The  6x13	 pixel	font  from  Unicode misc-fixed-...  also has a
       matching	12x13 CJK font but that	size is	really much too	small for  se-
       rious application on modern desktops which often	provide	higher resolu-
       tions than traditional workstations.

   UTF-8 environment setup
       The uterm script	enforces UTF-8 mode with the terminal and also sets up
       the locale variable environment to reflect UTF-8	terminal encoding.  If
       necessary, all LC_* and LANG environment	variables are modified to pro-
       vide  a	proper environment for applications started inside the Unicode
       terminal. (See the inline documentation of the  uterm  script  for  how
       this is done.)

   X resource class
       When  starting xterm, uterm uses	the X resource class UXTerm so you can
       configure the desired appearance	of UTF-8 mode terminal windows in your
       X  resource  configuration.   For  rxvt-unicode,	the class URxvt	can be
       used for	X resources.

   Unicode width data version
       If called with an -e option to invoke a specific	program	in  it,	 uterm
       enables the -mk_width option of xterm (if xterm version 201 or newer is
       available).  This tells xterm to	use  its  own,	compiled-in  character
       width  property	tables,	 rather	 than using system locale information.
       The advantage is	that this information is often newer (referring	 to  a
       newer  version  of  Unicode)  than the installed	system data.  Thus the
       user is enabled to use up-to-date Unicode  data	by  using  a  self-in-
       stalled	copy  of  xterm, rather	than being stuck with the Unicode data
       that the	system administrator cares to  install.	  This	is  especially
       useful if the application is known to be	able to	recognise that Unicode
       version,	like the Unicode editor	mined.	The umined script makes	use of
       this  feature  to  invoke mined in a Unicode terminal with a maximum of
       Unicode support.

   Keyboard resources for application use
       If called with an -e option to invoke a specific	program	in  it,	 uterm
       also  enables a number of other xterm resources in order	to enable best
       keyboard	and terminal control for applications:

       *VT100*eightBitOutput:true
	      to enable	8 Bit output (actually not needed in UTF-8 mode)

       *VT100*metaSendsEscape:true
	      to enable	ESC prefixing triggered	by Alt-key

       *VT100*eightBitInput:false
	      to enable	ESC prefixing triggered	by Alt-key in old  xterm  ver-
	      sions

       *VT100*deleteIsDEL:true
	      to enable	distinguishing the two DEL keys	on the keyboard

       *utf8Title:true
	      to enable	UTF-8 window title strings

FILES
       $HOME/.Xdefaults	or $HOME/.Xresources
	      typical location of user's X resource configuration

AUTHOR
       The  uterm script is an auxiliary script	packaged with the mined	editor
       by Thomas Wolff.	 Please	send comments,	suggestions,  bug  reports  to
       mined@towo.net.

uterm				  March	2015			      uterm(1)

NAME | SYNTAX | DESCRIPTION | FILES | AUTHOR

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