Scroll to navigation

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

February 2017 Kernel Hackers Manual 3.16