tcl, wish: $DISPLAY environment ???

wish: $DISPLAY environment ???

Author	Message
Anthony Dav #1 / 4	wish: $DISPLAY environment ??? I am always getting this error when i try to run wish: /tools: wish8.3 Application initialization failed: no display name and no $DISPLAY environment v ariable % /tools: What is the $DISPLAY variable? sorry if this is a beginner question i am just learning tcl/tk. -Anthony
Tue, 23 Nov 2004 00:48:20 GMT

Eric Brune #2 / 4	wish: $DISPLAY environment ??? Quote: > I am always getting this error when i try to run wish: > /tools: wish8.3 > Application initialization failed: no display name and no $DISPLAY > environment v ariable > % /tools: > What is the $DISPLAY variable? This has nothing to do with tcl/tk: the DISPLAY environment variable is used by the X11 client application to know where its graphical output should go. It's normally automatically set by your machine to the correct value but is frequently lost when you do a rlogin to another machine. Is it your case? If it is, the solution is simple: set this variable to the value "<hostname>:0", where <hostname is the name of your machine, or its IP address. The setting is made in the shell window just before running your tcl/tk application by doing: DISPLAY="<hostname>:0" export DISPLAY on sh-compatible shells (sh, ksh, bash), or: setenv DISPLAY "<hostname>:0" on csh-compatible shells (csh, tcsh) You may also have to issue the command: xhost + on your machine (not the one you rlogged to) to allow the distant machine to connect to its X11 server. HTH -- PragmaDev : Real Time Software Development Tools - http://www.pragmadev.com
Tue, 23 Nov 2004 03:05:03 GMT

Darren Ne #3 / 4	wish: $DISPLAY environment ??? Quote: > You may also have to issue the command: > xhost + > on your machine (not the one you rlogged to) to allow the distant machine > to connect to its X11 server. Doing "xhost +" allows any machine on the entire internet to see what you're typing. It's far better to read the man page for xhost and then simply say xhost blah where "blah" is the remote machine you're logged into. -- Darren New San Diego, CA, USA (PST). Cryptokeys on demand. http://home.san.rr.com/dnew/DNResume.html http://images.fbrtech.com/dnew/ My brain needs a "back" button so I can remember where I left my coffee mug.
Tue, 23 Nov 2004 04:17:53 GMT

lvir.. #4 / 4	wish: $DISPLAY environment ??? :I am always getting this error when i try to run wish: :/tools: wish8.3 :Application initialization failed: no display name and no $DISPLAY environment v :ariable :% /tools: : :What is the $DISPLAY variable? wish is an application for creating graphical user interfaces. On a Unix like system, this occurs via calls to the X Window System. The X Window system environment requires one to have defined in their shell environment a variable called $DISPLAY. This variable defines onto which machine and which monitor graphical output should be displayed. One normally gets such a variable set when one logs onto the console of a machine capable of running the X Window System. This is because the variable is required to get a window manager running, etc. One normally sees the above error after telnet'ing (or rsh/rlogin-ing) into a second machine. In cases like this, one needs to remember to set the DISPLAY variable back to the appropriate machine and monitor for display. -- Support Internet Radio <URL: http://saveinternetradio.org/ > Join Tcl'2002 in Vancouver http://www.tcl.tk/community/tcl2002/ Even if explicitly stated to the contrary, nothing in this posting should be construed as representing my employer's opinions.
Wed, 24 Nov 2004 01:24:56 GMT

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