syscall_define2(9)
NAME
SYSCALL_DEFINE2 - flock system call.
SYNOPSIS
SYSCALL_DEFINE2(flock, unsigned int, fd, unsigned int, cmd);
ARGUMENTS
- flock
- -- undescribed -
- int
- -- undescribed -
- fd
- the file descriptor to lock.
- int
- -- undescribed -
- 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.