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Top Forums Shell Programming and Scripting How to check if export DISPLAY is set or not? Post 302373397 by Scott on Friday 20th of November 2009 06:53:50 AM
Old 11-20-2009
Code:
[ -z "$DISPLAY" ] && echo Display not set && exit 1

 

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gvnccapture(1)							     VNC Tools							    gvnccapture(1)

NAME
gvnccapture - VNC screenshot capture SYNOPSIS
gvnccapture [OPTION]... [HOST][:DISPLAY] FILENAME DESCRIPTION
Capture a screenshot of the VNC desktop at HOST:DISPLAY saving to the image file FILENAME. If HOST is omitted it defaults to "localhost", if :DISPLAY is omitted, it defaults to ":1". FILENAME must end in a known image format extension (eg ".png", ".jpeg"). Supported options are --help, -? Display command line help information --quiet, -q Do not display information on the console when capturing the screenshot, with the exception of any password prompt. --debug, -d Display verbose debugging information on the console EXIT STATUS
The exit status is 0 upon successful screen capture, otherwise it is a non-zero integer EXAMPLES
# gvnccapture localhost:1 desktop.png Password: Connected to localhost:1 Saved display to desktop.png AUTHORS
Daniel P. Berrange <dan@berrange.com> COPYRIGHT
Copyright (C) 2010 Daniel P. Berrange <dan@berrange.com>. License LGPLv2+: GNU Lesser GPL version 2 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
vinagre(1) gtk-vnc-0.5.2 2013-02-22 gvnccapture(1)
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