1.\" Copyright (c) 1995 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)kvm_getvfsbyname.3 8.3 (Berkeley) 5/4/95 33.\" $FreeBSD: src/lib/libc/gen/getvfsbyname.3,v 1.7.2.5 2001/12/14 18:33:51 ru Exp $ 34.\" 35.Dd May 4, 1995 36.Dt GETVFSBYNAME 3 37.Os 38.Sh NAME 39.Nm getvfsbyname 40.Nd get information about a filesystem 41.Sh LIBRARY 42.Lb libc 43.Sh SYNOPSIS 44.In sys/param.h 45.In sys/mount.h 46.Ft int 47.Fn getvfsbyname "const char *name" "struct vfsconf *vfc" 48.Sh DESCRIPTION 49The 50.Fn getvfsbyname 51function provides access to information about a 52filesystem module that is configured in the kernel. 53If successful, 54the requested filesystem 55.Fa vfsconf 56is returned in the location pointed to by 57.Fa vfc . 58The fields in a 59.Dq Li struct vfsconf 60are defined as follows: 61.Pp 62.Bl -tag -compact -width vfc_refcount 63.It vfc_name 64the name of the filesystem 65.It vfc_typenum 66the filesystem type number assigned by the kernel 67.It vfc_refcount 68the number of active mount points using the filesystem 69.It vfc_flags 70flag bits as described in 71.Xr getvfsent 3 72.El 73.Sh RETURN VALUES 74.Rv -std getvfsbyname 75.Sh ERRORS 76The following errors may be reported: 77.Bl -tag -width Er 78.It Bq Er EFAULT 79The 80.Fa vfc 81pointer contains an invalid address. 82.It Bq Er ENOENT 83The 84.Fa name 85specifies a filesystem that is unknown or not configured in the kernel. 86.El 87.Sh SEE ALSO 88.Xr mount 2 , 89.Xr getvfsent 3 , 90.Xr sysctl 3 , 91.Xr mount 8 , 92.Xr sysctl 8 93.Sh HISTORY 94A variant of the 95.Fn getvfsbyname 96function first appeared in 97.Fx 2.0 . 98