fork (2), open (2), lockf (3), lslocks (8) Documentation/filesystems/locks.txt in the Linux kernel source treecapabilities (7), feature_test_macros (7), lslocks (8) locks.txt , mandatory-locking.txt , and dnotify.txt in the Linuxcapabilities (7), feature_test_macros (7), lslocks (8) locks.txt , mandatory-locking.txt , and dnotify.txt in the Linux