fcntl (2), fork (2), open (2), lockf (3), lslocks (8) Documentation/filesystems/locks.txt in the Linux kernelflock (2), open (2), socket (2), lockf (3), capabilities (7), feature_test_macros (7), lslocksflock (2), open (2), socket (2), lockf (3), capabilities (7), feature_test_macros (7), lslocks