DragonFly On-Line Manual Pages

VOP_ADVLOCK(9)        DragonFly 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_POSIX    Use POSIX semantics for lock

     This entry point manipulates advisory record locks on the file.  Most
     filesystems 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 man page was written by Doug Rabson.

DragonFly 3.5                    June 30, 1999                   DragonFly 3.5