VOP_ADVLOCK(9) MidnightBSD Kernel Developer’s Manual VOP_ADVLOCK(9)

NAME

VOP_ADVLOCK — advisory record locking

SYNOPSIS

#include <sys/param.h>
#include <sys/vnode.h>
#include <sys/fcntl.h>
#include <sys/lockf.h>

int

VOP_ADVLOCK(struct vnode *vp, caddr_t id, int op, struct flock *fl, int flags);

DESCRIPTION

The arguments are:

vp

The vnode being manipulated.

id

The id token which is changing the lock.

op

The operation to perform (see fcntl(2)).

fl

Description of the lock.

flags

One of more of the following:

F_RDLCK

Shared or read lock.

F_UNLCK

Unlock.

F_WRLCK

Exclusive or write lock.

F_WAIT

Wait until lock is granted.

F_FLOCK

Use flock(2) semantics for lock.

F_POSIX

Use POSIX semantics for lock.

This entry point manipulates advisory record locks on the file. Most file systems delegate the work for this call to lf_advlock().

RETURN VALUES

Zero is returned on success, otherwise an error is returned.

SEE ALSO

fcntl(2), flock(2), vnode(9)

AUTHORS

This manual page was written by Doug Rabson.

MidnightBSD 0.3 June 30, 1999 MidnightBSD 0.3