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+.\" Copyright (c) 1995
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" 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
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)kvm_getvfsbyname.3	8.3 (Berkeley) 5/4/95
+.\" $FreeBSD$
+.\"
+.Dd May 4, 1995
+.Dt GETVFSBYNAME 3
+.Os
+.Sh NAME
+.Nm getvfsbyname
+.Nd get information about a filesystem
+.Sh SYNOPSIS
+.Fd #include <sys/param.h>
+.Fd #include <sys/mount.h>
+.Ft int
+.Fn getvfsbyname "const char *name" "struct vfsconf *vfc"
+.Sh DESCRIPTION
+The
+.Fn getvfsbyname
+function provides access to information about a
+filesystem module that is configured in the kernel.
+If successful,
+the requested filesystem
+.Fa vfsconf
+is returned in the location pointed to by
+.Fa vfc .
+The fields in a
+.Dq Li struct vfsconf
+are defined as follows:
+.Pp
+.Bl -tag -compact -width vfc_refcount
+.It vfc_name
+the name of the filesystem
+.It vfc_typenum
+the filesystem type number assigned by the kernel
+.It vfc_refcount
+the number of active mount points using the filesystem
+.It vfc_flags
+flag bits that are used to initialize a new mount point
+using the filesystem
+.El
+.Sh RETURN VALUES
+If the call to
+.Nm getvfsbyname
+is successful, 0 is returned.
+Otherwise \-1 is returned and
+.Va errno
+is set appropriately.
+.Sh ERRORS
+The following errors may be reported:
+.Bl -tag -width Er
+.It Bq Er EFAULT
+The
+.Fa vfc
+pointer contains an invalid address.
+.It Bq Er ENOENT
+The
+.Fa name
+specifies a filesystem that is unknown or not configured in the kernel.
+.Sh SEE ALSO
+.Xr mount 2 ,
+.Xr sysctl 3 ,
+.Xr mount 8 ,
+.Xr sysctl 8
+.Sh HISTORY
+A variant of the
+.Fn getvfsbyname
+function first appeared in
+.Fx 2.0 .