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Full Discussion: Passing shell variables to a webpage
Homework and Emergencies Homework & Coursework Questions Passing shell variables to a webpage Post 302581282 by ChedWick on Monday 12th of December 2011 03:27:10 PM
Old 12-12-2011
Quote:
Originally Posted by Corona688
Does this variable actually exist anywhere, or is it just sitting in some file?
Firstly, thanks for posting I really appreciate any help.

Now at the moment in my simple example the variable is just sitting within that script in my cgi directory. I have another file (at this point its simply a html file) in my public web directory.

Quote:
What do you need to be able to do with this variable? Shell variables only make sense in a shell...
Well with my project I need to retrieve a variable from my server script and apply it to the webpage that the user is viewing so that it can dynamically create an svg graph (a rather ghetto graph with simple shapes). But for my simple example I just want to be able to load my html file and have a variable get assigned to the value of a simple variable in my shell script and then either print it or alert it.


Quote:
You could export the variable, then have your PHP executed like this:

Code:
# variable file

export A="asdf"

Code:
#!/bin/sh

. variablefile

/usr/lib/php5.3/bin/php <<EOF
<?php
        printf("variable A is %s\n", getenv("A")); ?>
EOF

exit

But I get the feeling you want to have more control over the variable than that, you need to set and retrieve it when you please, not just when first executed, and do so in a manner safe across several connections.
Thanks for that advice. I'll look into some of those techniques. Ideally I'm just looking to have the variable set and retrieved when the page is loaded or refreshed. I'm also not too worried about safe transfers with this project but it certainly good to keep that in mind for the future.

Now after talking to some of my classmates I might have found a way that may help. I'm gonna play around with what you've given me here as well as some AJAX and hopefully get somewhere. I'll post back later if I get what I want done.
 

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LEARN ABOUT XFREE86

debconf-mergetemplate

DEBCONF-MERGETEMPLATE(1)					      Debconf						  DEBCONF-MERGETEMPLATE(1)

NAME

       debconf-mergetemplate - merge together multiple debconf template files

SYNOPSIS

	debconf-mergetemplate [options] [templates.ll ...] templates

DESCRIPTION

       Note: This utility is deprecated. You should switch to using po-debconf's po2debconf program.

       This program is useful if you have multiple debconf templates files which you want to merge together into one big file. All the specified
       files will be read in, merged, and output to standard output.

       This can be especially useful if you are dealing with translated template files. In this case, you might have your main template file, plus
       several other files provided by the translators. These files will have translated fields in them, and maybe the translators left in the
       english versions of the fields they translated, for their reference.

       So, you want to merge together all the translated templates files with your main templates file. Any fields that are unique to the
       translated files need to be added in to the correct templates, but any fields they have in common should be superseded by the fields in the
       main file (which might be more up-to-date).

       This program handles that case properly, just list each of the translated templates files, and then your main templates file last.

OPTIONS

       --outdated
	   Merge in even outdated translations. The default is to drop them with a warning message.

       --drop-old-templates
	   If a translation has an entire template that is not in the master file (and thus is probably an old template), drop that entire
	   template.

SEE ALSO

       debconf-getlang(1)

AUTHOR

       Joey Hess <joeyh@debian.org>

								    2012-09-10						  DEBCONF-MERGETEMPLATE(1)
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