Re: [PLUG] Distinguishing between environment variable with null value and one that is not set

[sean finney <seanius@seanius.net>]

and hi again :)

On Tue, Oct 13, 2009 at 04:45:45PM -0400, Paul L. Snyder wrote:
>   % typeset -p foo

just fyi, that's a bashism (or at least, it's not POSIX), so you can
likely run into trouble if you ship it with a #!/bin/sh shebang.  for
example, it's not in dash, which is the standard /bin/sh for debian and
ubuntu these days.

> Doing a more normal '2>&1 >/dev/null' immediately after the typeset doesn't
> work (I'm sure there's a good reason, but I'd have to figure it out), so we

i think you want >/dev/null 2>&1 (the order is significant).


	sean

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