On Wed, Oct 23, 2013 at 06:55:02AM -0700, James Chargin wrote:
> I have, more recently, been using scripting of the form
>
> if test "X" != "X${var}"; then
> echo defined
> else
> echo undefined
> fi
Thanks for the feedback.
I was attempting to do so
Dear Andrew Ruder,
On 10/22/2013 05:07 PM, Andrew Ruder wrote:
env exists is a way to test (in hush) if an environment variable
exists. A workaround existed using printenv but this new command
doesn't require all the stdout/stderr redirection to prevent
printing information to the screen.
I w
env exists is a way to test (in hush) if an environment variable
exists. A workaround existed using printenv but this new command
doesn't require all the stdout/stderr redirection to prevent
printing information to the screen.
Example:
$ set testexists 1
$ env exists testexists && echo "yes"
yes
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