[oclug] BASH - what does export do?
flynn at clarkhall.ca
Tue May 24 14:50:02 EDT 2005
On Tue, May 24, 2005 at 02:42:45PM -0400, Andy Civil wrote:
> I've googled for the answer, and the advice always seems to be to use
> "source" to make it run in the same shell - but that seems like a
> kludge, and anyway, I don't want to type it a thousand times (it's not
> like you can put the "source" part in a script, right???!).
Google did provide you the answer, and it is not a kludge. If you
don't like typing "source" you can just use "." (which is POSIX
standard whereas "source" isn't) as in ". ./somefile" ... and you can
indeed put the "source" part in a script.
> Anyway, if you "source", you don't even need the export - so what does
> it do???
export will make that contents variable available to subshells and
other commands that you run. If you don't export them, they won't be
in the environment of those other commands.
> Am I going to be reduced to storing my variable in a file, and using
> `cat file` with backticks to construct my commands?
I can't imagine why you would do that.
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