Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: How to check if export DISPLAY is set or not?
Top Forums Shell Programming and Scripting How to check if export DISPLAY is set or not? Post 302373411 by Scott on Friday 20th of November 2009 07:26:45 AM
Old 11-20-2009
Hi.

No, you can use it as-is. Place it near the top of your script.

If DISPLAY is not exported, your script won't see it and this will print a message and exit.

It's the same as
Code:

if [ -z "$DISPLAY" ]; then
  echo Display not set
  exit 1
fi

If you need to check for a specific value in DISPLAY, you can try this:

Code:
[ "$DISPLAY" != "same_host:0.0"  ] && echo Display not set && exit 1

 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

export DISPLAY and XPM´s

Hi! I´ve an application that runs in a Digital Tru64, exporting display to a Linux host. That application blinks a icon (in XPM mode) when the severity mode changes. When I put a backdrop(XPM, too) in that screen, the icons blink slowly. When I remove it, they turn to blink quickly. I have... (3 Replies)
Discussion started by: selina
3 Replies

2. Shell Programming and Scripting

do a export DISPLAY

hello to begin i sorry for my english because i'am french so: someone can explain me to do a export DIPLAY with a web page (php) i have test the php function exec (myscriptshell.sh) but he can't do the export diplay. if someone have a solution . bye (1 Reply)
Discussion started by: the_nul
1 Replies

3. UNIX for Dummies Questions & Answers

difference between set and export

Hi, can anybody tell me what is the difference between set and export in unix. -Ashish (1 Reply)
Discussion started by: shriashishpatil
1 Replies

4. UNIX for Dummies Questions & Answers

How to export the Display variable

I'm trying to open an xwindow on my Sun server. What am I doing wrong? # echo $SHELL /sbin/sh # # export DISPLAY=localhost:0.0 DISPLAY=localhost:0.0: is not an identifier Thank you! (1 Reply)
Discussion started by: FredSmith
1 Replies

5. Solaris

Cant export display from aix to solaris.

Hi Frnds, i face a peculiar issue. I am managing 200 Aix workstations and 20 sun boxes. I am not anle to export the display from aix workstations to sun box, But vice versa it is working fine. But if i try to export the display to a sun box from other sun box it works perfectly. Could... (3 Replies)
Discussion started by: sriram.s
3 Replies

6. Shell Programming and Scripting

use of set, export and typeset

what is the difference in usage of set, export, typeset while declaring a value to a variable can any one help thanks (0 Replies)
Discussion started by: trichyselva
0 Replies

7. UNIX for Advanced & Expert Users

export display

hello frnds, I want to export display of othe terminal to my terminal and want to post a msg, which should visible at other terminal, I tried myself, but couldnt get it plz help me to get solution (1 Reply)
Discussion started by: sushant.pathade
1 Replies

8. Solaris

export DISPLAY

rsh to host2 from host1 and from host2 rsh into host3 Is it possible to display a GUI from host3 through host2 and onto host1? (1 Reply)
Discussion started by: eddiet
1 Replies

9. UNIX for Advanced & Expert Users

DISPLAY=local_host:0.0 ; export DISPLAY

Hi, from my Windows Workstation I can connect with PUTTY to an AIX 6.1 unix server. On AIX via PUTTY I run DBCA which has a grphical interface. Then : #DISPLAY=local_host:0.0 ; export DISPLAY $(hostname) $(whoami):/appli/oracle/product/10.2.0/db_1/bin#dbca _X11TransSocketINETConnect()... (12 Replies)
Discussion started by: big123456
12 Replies

10. Solaris

export vs env vs set commands

Hi I'm trying to understand variable scopes in solaris10. It is said that to display env variables we use 3 commands : - env - set - export What is the difference between them ? thx for help. ---------- Post updated at 11:00 AM ---------- Previous update was at 10:50 AM ---------- ... (2 Replies)
Discussion started by: presul
2 Replies

LEARN ABOUT DEBIAN

mfontset_lookup

mfontset_lookup(3m17n)						 The m17n Library					    mfontset_lookup(3m17n)

NAME

       mfontset_lookup - Lookup a fontset.

SYNOPSIS

       MPlist * mfontset_lookup (MFontset * fontset, MSymbol script, MSymbol language, MSymbol charset)

DESCRIPTION

       Lookup a fontset. The mfontset_lookup() function lookups fontset and returns a plist that describes the contents of fontset corresponding
       to the specified script, language, and charset.

       If script is Mt, keys of the returned plist are script name symbols for which some fonts are specified and values are NULL.

       If script is a script name symbol, the returned plist is decided by language.

       o If language is Mt, keys of the plist are language name symbols for which some fonts are specified and values are NULL. A key may be Mt
	 which means some fallback fonts are specified for the script.
       o If language is a language name symbol, the plist is a FONT-GROUP for the specified script and language.  FONT-GROUP is a plist whose keys
	 are FLT (FontLayoutTable) name symbols (Mt if no FLT is associated with the font) and values are pointers to MFont.
       o If language is Mnil, the plist is fallback FONT-GROUP for the script.
       If script is Mnil, the returned plist is decided as below.
       o If charset is Mt, keys of the returned plist are charset name symbols for which some fonts are specified and values are NULL.
       o If charset is a charset name symbol, the plist is a FONT-GROUP for the charset.
       o If charset is Mnil, the plist is a fallback FONT-GROUP.
RETURN VALUE

	   It returns a plist describing the contents of a fontset. The plist should be freed by m17n_object_unref().
COPYRIGHT

       Copyright (C) 2001 Information-technology Promotion Agency (IPA)
       Copyright (C) 2001-2011 National Institute of Advanced Industrial Science and Technology (AIST)
       Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License
       <http://www.gnu.org/licenses/fdl.html>.

Version 1.6.2							    12 Jan 2011 					    mfontset_lookup(3m17n)
All times are GMT -4. The time now is 03:01 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy