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.\" $DragonFly: src/lib/libc/gen/getvfsbyname.3,v 1.2 2003/06/17 04:26:42 dillon Exp $ 35.\" 36.Dd May 4, 1995 37.Dt GETVFSBYNAME 3 38.Os 39.Sh NAME 40.Nm getvfsbyname 41.Nd get information about a filesystem 42.Sh LIBRARY 43.Lb libc 44.Sh SYNOPSIS 45.In sys/param.h 46.In sys/mount.h 47.Ft int 48.Fn getvfsbyname "const char *name" "struct vfsconf *vfc" 49.Sh DESCRIPTION 50The 51.Fn getvfsbyname 52function provides access to information about a 53filesystem module that is configured in the kernel. 54If successful, 55the requested filesystem 56.Fa vfsconf 57is returned in the location pointed to by 58.Fa vfc . 59The fields in a 60.Dq Li struct vfsconf 61are defined as follows: 62.Pp 63.Bl -tag -compact -width vfc_refcount 64.It vfc_name 65the name of the filesystem 66.It vfc_typenum 67the filesystem type number assigned by the kernel 68.It vfc_refcount 69the number of active mount points using the filesystem 70.It vfc_flags 71flag bits as described in 72.Xr getvfsent 3 73.El 74.Sh RETURN VALUES 75.Rv -std getvfsbyname 76.Sh ERRORS 77The following errors may be reported: 78.Bl -tag -width Er 79.It Bq Er EFAULT 80The 81.Fa vfc 82pointer contains an invalid address. 83.It Bq Er ENOENT 84The 85.Fa name 86specifies a filesystem that is unknown or not configured in the kernel. 87.El 88.Sh SEE ALSO 89.Xr mount 2 , 90.Xr getvfsent 3 , 91.Xr sysctl 3 , 92.Xr mount 8 , 93.Xr sysctl 8 94.Sh HISTORY 95A variant of the 96.Fn getvfsbyname 97function first appeared in 98.Fx 2.0 . 99