count_dev (9)

Leading comments

Copyright (c) 2000 Andrew Stevenson

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 disclaim...

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

NAME

vcount count_dev - get total number of references to a device

SYNOPSIS

In sys/param.h In sys/time.h In sys/conf.h In sys/vnode.h Ft int Fn vcount struct vnode *vp Ft int Fn count_dev struct cdev *dev

DESCRIPTION

Fn vcount is used to get the number of references to a particular device. It allows for the fact that multiple vnodes may reference the same device. Fn count_dev does the same thing as Fn vcount , but takes a Vt struct cdev rather than a Vt struct vnode pointer as an argument.

RETURN VALUES

Fn vcount and Fn count_dev both return the number of references to the device.

SEE ALSO

VFS(9), vnode(9)

AUTHORS

This manual page was written by An Andrew Stevenson .