Re: [PATCH] t/lib-httpd: switch SANITY check for NOT_ROOT

On Thu, Jan 15, 2015 at 07:27:34PM -0800, Kyle J. McKay wrote:

quoted

We implement NOT_ROOT by checking perl's "$>" variable,
since we cannot rely on the "id" program being available
everywhere (and we would rather avoid writing a custom C
program to run geteuid if we can).

Does it make a difference that id is POSIX [1]?

I don't know. Do all of the platforms where we run http tests have it
(and conforming to POSIX-ish options or output)? It may be OK to guess
yes and see if anybody complains (the worst case is skipping http
tests).

"id -u" works for me in MSYS and cygwin (each appears to have it's own
id.exe).

That's comforting. MSYS was the one I was most worried about. What UID
do they report? I.e., do they correctly tell us if we are root (or
more accurately, if we are not root)?

quoted

+test_lazy_prereq NOT_ROOT '
+	uid=$(perl -e "print \$<") &&
+	test "$uid" != 0
+'

Does NO_PERL affect this?  Or is Perl always required to run the tests.

No, we use a very limited subset of perl in our tests when necessary
(basic enough that any perl5 will do), regardless of the NO_PERL
setting.

Also "$<" is real user id.  Don't you want effective user id ("$>"), that's
what the comment says...

Yeah, I bungled this initially and thought I fixed it, but clearly not.
:-/

I'll re-roll, but if we can get away with "id -u" I think that's
preferable.

-Peff

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