centos man page for sys_flock

SYS_FLOCK(9)							   The Linux VFS						      SYS_FLOCK(9)

NAME
       sys_flock - flock system call.

SYNOPSIS
       long sys_flock(unsigned int fd, unsigned int cmd);

ARGUMENTS
       fd
	   the file descriptor to lock.

       cmd
	   the type of lock to apply.

DESCRIPTION
       Apply a FL_FLOCK style lock to an open file descriptor. The cmd can be one of

       LOCK_SH -- a shared lock.

       LOCK_EX -- an exclusive lock.

       LOCK_UN -- remove an existing lock.

       LOCK_MAND -- a `mandatory' flock. This exists to emulate Windows Share Modes.

       LOCK_MAND can be combined with LOCK_READ or LOCK_WRITE to allow other processes read and write access respectively.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							      SYS_FLOCK(9)