/usr/src/openvswitch-1.4.0/tests/ovsdb-macros.at is in openvswitch-datapath-dkms 1.4.0-1ubuntu1.
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 6 7 8 9 10 11 12 13 14 | dnl OVSDB_INIT([$1])
dnl
dnl Creates an empty database named $1.
m4_define([OVSDB_INIT],
[AT_CHECK(
[ovsdb-tool create $1 $abs_top_srcdir/vswitchd/vswitch.ovsschema],
[0], [stdout], [ignore])
AT_CHECK(
[[ovsdb-tool transact $1 \
'["Open_vSwitch",
{"op": "insert",
"table": "Open_vSwitch",
"row": {}}]']],
[0], [ignore], [ignore])])
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