/usr/lib/mysql-testsuite/include/have_outfile.inc is in percona-server-test-5.6 5.6.22-rel71.0-0ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 | -- require r/have_outfile.require
disable_query_log;
select load_file(concat(@tmpdir,'/outfile.test'));
--remove_file $MYSQLTEST_VARDIR/tmp/outfile.test
enable_query_log;
|