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-rw-r--r--mysql-test/include/have_working_dns.inc11
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diff --git a/mysql-test/include/have_working_dns.inc b/mysql-test/include/have_working_dns.inc
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+#
+# Check if we have a working DNS.
+# Some 'wildcard dns' return some address even for non-existing hosts. This
+# makes it hard to test connections to such host names.
+# The actual check for working DNS is done in Perl, and the result available
+# in an environment variable.
+#
+--require include/have_working_dns.require
+disable_query_log;
+eval SELECT LENGTH('$HAVE_BROKEN_DNS') = 0 AS 'have_working_dns';
+enable_query_log;