/usr/src/openvswitch-1.4.0/tests/lockfile.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 15 16 17 18 19 20 | AT_BANNER([lockfile unit tests])
m4_define([CHECK_LOCKFILE],
[AT_SETUP([m4_translit([$1], [_], [ ])])
AT_KEYWORDS([lockfile])
AT_CHECK([test-lockfile $1], [0], [$1: success (m4_if(
[$2], [1], [$2 child], [$2 children]))
])
AT_CLEANUP])
CHECK_LOCKFILE([lock_and_unlock], [0])
CHECK_LOCKFILE([lock_and_unlock_twice], [0])
CHECK_LOCKFILE([lock_blocks_same_process], [0])
CHECK_LOCKFILE([lock_blocks_same_process_twice], [0])
CHECK_LOCKFILE([lock_blocks_other_process], [1])
CHECK_LOCKFILE([lock_twice_blocks_other_process], [1])
CHECK_LOCKFILE([lock_and_unlock_allows_other_process], [1])
CHECK_LOCKFILE([lock_timeout_gets_the_lock], [1])
CHECK_LOCKFILE([lock_timeout_runs_out], [1])
CHECK_LOCKFILE([lock_multiple], [0])
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