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how to determine if a shell is running as Administrator?
- From: Andrew Schulman <schulman dot andrew at epa dot gov>
- To: cygwin at cygwin dot com
- Date: Thu, 05 Feb 2015 04:43:09 -0500
- Subject: how to determine if a shell is running as Administrator?
- Authentication-results: sourceware.org; auth=none
What's a reliable and efficient way to determine programmatically if the shell
that's running has elevated privileges?
Or if you prefer, how can I tell if the shell was started with "Run as
I'm looking for a solution that's reliable across installations and OS versions.
I want it also to be fairly fast, so it can be used for example in setting shell
There's a SuperUser thread that talks about this. None of the solutions
seems completely satisfactory:
1. Run a command that only an Administrator can run, and check the return
status. But which one? Suggestions are:
a. at. But at may not be on the $PATH, or supported.
b. touch /cygdrive/c/Users/.x , or some other protected path. But which paths
are protected is installation-dependent (as is the /cygdrive prefix).
c. editrights -l. On my host my unprivileged account can't even run this, so
I get a return status of 1. In a privileged shell I get 0 or 2. Is that
2. Parse the output of groups or id -G. I can't find any reliable way to do
this. For example on my host, when I start a shell with "Run as administrator",
the new group I get isn't 544 (Administrators). It's 114 (Local account and
member of Administrators group). Is that at all portable or reliable?
What other ways are there?
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