08-23-2012
Please post what Operating System and version you are running so we can work out what Shell /bin/sh is (unless you can tell us).
What @alister is saying is that the environment variables in the "Here Document" (the bit between <<EOF and EOF) are evaluated by the calling Shell BEFORE the su - runs.
I can't think of an Operating System where the script would work at all because su - should prompt for a password. ... Unless you are logged in as root ?
There are techniques to do what I think you want to do, but let's find out what you actually want the script to do? Are you running as root ?
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gpdf(1) User Commands gpdf(1)
NAME
gpdf - view PDF documents
SYNOPSIS
gpdf [gnome-std-options] [filename...]
DESCRIPTION
The PDF Document Viewer application is based on xpdf. PDF Document Viewer provides viewing features such as panning, zoom in, zoom out,
best fit, and fit width.
OPTIONS
The following options are supported:
gnome-std-options Standard options available for use with most GNOME applications. See gnome-std-options(5) for more information.
OPERANDS
The following operands are supported:
filename The name of the to be .
EXAMPLES
Example 1: Launching the PDF Document Viewer
example% gpdf
Example 2: Opening the Document test.pdf in PDF Document Viewer
example% gpdf test.pdf
ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment variables that affect the execution of gpdf: NLSPATH.
EXIT STATUS
The following exit values are returned:
0 Application exited successfully
>0 Application exited with failure
FILES
The following files are used by this application:
/usr/bin/gpdf Executable for PDF Document Viewer.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWgnome-* |
+-----------------------------+-----------------------------+
|Interface stability |External |
+-----------------------------+-----------------------------+
SEE ALSO
PDF Document Viewer Manual
Latest version of the GNOME Desktop User Guide for your platform.
gnome-std-options(5)
NOTES
Written by Niall Power, Sun Microsystems Inc., 2003.
SunOS 5.10 1 Oct 2003 gpdf(1)