VOP_ADVLOCK (9)

Leading comments

Copyright (c) 1996 Doug Rabson

All rights reserved.

This program is free software.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in...

(The comments found at the beginning of the groff file "man9/VOP_ADVLOCK.9freebsd".)

NAME

VOP_ADVLOCK - advisory record locking

SYNOPSIS

In sys/param.h In sys/vnode.h In sys/fcntl.h In sys/lockf.h Ft int Fn VOP_ADVLOCK struct vnode *vp caddr_t id int op struct flock *fl int flags

DESCRIPTION

The arguments are:

Fa vp

The vnode being manipulated.

Fa id

The id token which is changing the lock.

Fa op

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

Fa fl

Description of the lock.

Fa 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 Fn 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 An Doug Rabson .