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Full Discussion: Acces Variable from expect-Script in bash-Script
Top Forums Shell Programming and Scripting Acces Variable from expect-Script in bash-Script Post 302914119 by Don Cragun on Friday 22nd of August 2014 04:23:15 AM
Old 08-22-2014
Environment variables set in a child cannot affect the environment of the parent.

In this case you're setting a in a grandchild. The parentheses run the expect command in a subshell and expect itself creates a separate execution environment.

If you need to transfer data from child to parent, you need to send the data to the parent through an external channel. For instance, the exit status of the child (a value between 0 and 255) will appear as $? in the parent; the child can write a string that can be captured with something like:
Code:
var="$( do whatever; printf 'return string' )"

but note that a trailing <newline>, if present, and all trailing IFS whitespace characters will be stripped from the output by the command substitution; or the child can write data to a file and the parent can read that file at its leisure.
 

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LEARN ABOUT OSX

test::script

Test::Script(3) 					User Contributed Perl Documentation					   Test::Script(3)

NAME

       Test::Script - Basic cross-platform tests for scripts

DESCRIPTION

       The intent of this module is to provide a series of basic tests for 80% of the testing you will need to do for scripts in the script (or
       bin as is also commonly used) paths of your Perl distribution.

       Further, it aims to provide this functionality with perfect platform-compatibility, and in a way that is as unobtrusive as possible.

       That is, if the program works on a platform, then Test::Script should always work on that platform as well. Anything less than 100% is
       considered unacceptable.

       In doing so, it is hoped that Test::Script can become a module that you can safely make a dependency of all your modules, without risking
       that your module won't on some platform because of the dependency.

       Where a clash exists between wanting more functionality and maintaining platform safety, this module will err on the side of platform
       safety.

FUNCTIONS

   script_compiles
	   script_compiles( 'script/foo.pl', 'Main script compiles' );

       The "script_compiles" test calls the script with "perl -c script.pl", and checks that it returns without error.

       The path it should be passed is a relative unix-format script name. This will be localised when running "perl -c" and if the test fails the
       local name used will be shown in the diagnostic output.

       Note also that the test will be run with the same perl interpreter that is running the test script (and not with the default system perl).
       This will also be shown in the diagnostic output on failure.

   script_runs
	   script_runs( 'script/foo.pl', 'Main script runs' );

       The "script_runs" test executes the script with "perl script.pl" and checks that it returns success.

       The path it should be passed is a relative unix-format script name. This will be localised when running "perl -c" and if the test fails the
       local name used will be shown in the diagnostic output.

       The test will be run with the same perl interpreter that is running the test script (and not with the default system perl). This will also
       be shown in the diagnostic output on failure.

SUPPORT

       All bugs should be filed via the bug tracker at

       http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Test-Script <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Test-Script>

       For other issues, or commercial enhancement and support, contact the author.

AUTHOR

       Adam Kennedy <adamk@cpan.org>

SEE ALSO

       prove, <http://ali.as/>

COPYRIGHT

       Copyright 2006 - 2009 Adam Kennedy.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

       The full text of the license can be found in the LICENSE file included with this module.

perl v5.16.2							    2009-11-23							   Test::Script(3)
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