freebsd-dev/share/man/man9/vn_isdisk.9

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.\"
.\" Copyright (C) 2001 Chad David <davidc@acns.ab.ca>. All rights reserved.
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.\" $FreeBSD$
.\"
.Dd July 9, 2001
.Dt VN_ISDISK 9
.Os
.Sh NAME
.Nm vn_isdisk
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.Nd "checks if a vnode represents a disk"
.Sh SYNOPSIS
.In sys/param.h
.In sys/vnode.h
.Ft int
.Fn vn_isdisk "struct vnode *vp" "int *errp"
.Sh DESCRIPTION
The
.Fn vn_isdisk
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function checks to see if
.Fa vp
represents a disk.
In order for
.Fa vp
to be a disk,
it must be a character device,
.Va v_rdev
must be valid, and the
.Vt cdevsw
entry's
.Va flags
must have
.Dv D_DISK
set.
.Pp
Its arguments are:
.Bl -tag -width ".Fa errp"
.It Fa vp
The vnode to check.
.It Fa errp
An integer pointer to store the error number in if the call fails.
.El
.Sh RETURN VALUES
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If the vnode represents a disk, 1 is returned; otherwise, 0
is returned and
.Fa errp
will contain the error number.
.Sh AUTHORS
This manual page was written by
2001-07-13 08:14:54 +00:00
.An Chad David Aq davidc@acns.ab.ca .