On Fri, 29 Sep 2017, Iain Morgan wrote:
> Actually, according to OpenBSD's printenv(1) man page, it first appeared
> in 2BSD. The man page on OS X claims it was BSD 3.0. However, it doesn't
> appear to be part of any standard.
>
> Your suggestion ran into the same issue as the original test, but
> escaping the evaluation by the user's shell appears to work:
>
> 'test -z `sh -c "echo \$SSH_USER_AUTH"`' || fail "SSH_USER_AUTH present"
How about:
diff --git a/regress/authinfo.sh b/regress/authinfo.sh
index e725296c..b47f4e5a 100644
--- a/regress/authinfo.sh
+++ b/regress/authinfo.sh
@@ -5,8 +5,10 @@ tid="authinfo"
# Ensure the environment variable doesn't leak when ExposeAuthInfo=no.
verbose "ExposeAuthInfo=no"
+
env SSH_USER_AUTH=blah ${SSH} -F $OBJ/ssh_proxy x \
- 'test -z "$SSH_USER_AUTH"' || fail "SSH_USER_AUTH present"
+ "exec sh -c 'test -z \"\$SSH_USER_AUTH\"'" || \
+ fail "SSH_USER_AUTH present"
verbose "ExposeAuthInfo=yes"
echo ExposeAuthInfo=yes >> $OBJ/sshd_proxy
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