Sponsored Content
Top Forums Shell Programming and Scripting How to check if export DISPLAY is set or not? Post 302373409 by aigles on Friday 20th of November 2009 07:25:33 AM
Old 11-20-2009
If you want to check if the variable DISPLAY is exported from your environment and not only defined, you can do :
Code:
export | grep -q '^DISPLAY=' && echo Ok || echo Not Exported

Code:
$ unset DISPLAY
$ export | grep -q '^DISPLAY=' && echo Ok || echo Not Exported
Not Exported
$ DISPLAY=value
$ export | grep -q '^DISPLAY=' && echo Ok || echo Not Exported
Not Exported
$ export DISPLAY=value                                        
$ export | grep -q '^DISPLAY=' && echo Ok || echo Not Exported
Ok
$

Jean-Pierre.
 

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
EXPORT(3PVM)															      EXPORT(3PVM)

NAME
pvm_export, pvm_unexport - Mark environment variables to export through spawn SYNOPSIS
C int cc = pvm_export( char *name ) int cc = pvm_unexport( char *name ) Fortran Not available PARAMETERS
name Name of an environment variable to add to or delete from export list. DESCRIPTION
The routines pvm_export and pvm_unexport are provided for convenience in editing environment variable PVM_EXPORT, while maintaining the colon-separated list syntax it requires. The variable can be modified by other means, and at the same time by the pvm_export functions. pvm_export checks to see if a name is already in PVM_EXPORT before including it, and exporting a name more than once is not considered an error. Likewise, pvm_unexport will not complain if you specify a name not in PVM_EXPORT. EXAMPLES
C: /* PVM_EXPORT=SHELL:HOME */ pvm_export("DISPLAY"); pvm_export("TERM"); pvm_unexport("HOME"); /* PVM_EXPORT=SHELL:DISPLAY:TERM */ ERRORS
No error conditions are currently returned by pvm_export and pvm_unexport. SEE ALSO
pvm(1PVM) pvm_spawn(3PVM) 15 May, 1996 EXPORT(3PVM)
All times are GMT -4. The time now is 02:55 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy