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Shell Programming and Scripting

export of a variable isn't working

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Top Forums Shell Programming and Scripting export of a variable isn't working
# 8  
Old 08-07-2012
Quote:
Originally Posted by hipe
Replace
Code:
export m=$m

with
Code:
export m

in your script.
i tryed both and both versions are not working
# 9  
Old 08-07-2012
How and where do you test if it is exported? I guess not in the same script. As Franklin already wrote, you have to source the exporting script to have set variables etc. available in your current shell or script.
Just executing the script and after that hoping to have the variable available in the current shell will not work.
The export only works in subsequent shells being called by the shell that exported the variable. It can't be exported that way to a same or higher level shell, if you imagine the calling of shells like a kind of tree construct.
This User Gave Thanks to zaxxon For This Post:
IMPe
# 10  
Old 08-07-2012
Quote:
Originally Posted by zaxxon
How and where do you test if it is exported? I guess not in the same script. As Franklin already wrote, you have to source the exporting script to have set variables etc. available in your current shell or script.
Just executing the script and after that hoping to have the variable available in the current shell will not work.
The export only works in subsequent shells being called by the shell that exported the variable. It can't be exported that way to a same or higher level shell, if you imagine the calling of shells like a kind of tree construct.
Thank you !
Unfortunately i even tried to export the variable to have it available in the current shell.
Thanks, for the explanation!
# 11  
Old 08-07-2012
Perhaps re-read post #3, an additon to the minor correction to the script posted.

How you execute the script is important if you want to set environment variables in the current environment.
Quote:
. ./scriptname
That is dot-space-dot-solidus-scriptname.

If such a script exports environment variables those environment variables are available to slave scripts run directly from the current shell. You can never export to a parent script.
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