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. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" @(#)kvm_getvfsbyname.3 8.3 (Berkeley) 5/4/95 29.\" $FreeBSD: src/lib/libc/gen/getvfsbyname.3,v 1.7.2.5 2001/12/14 18:33:51 ru Exp $ 30.\" $DragonFly: src/lib/libc/gen/getvfsbyname.3,v 1.2 2003/06/17 04:26:42 dillon Exp $ 31.\" 32.Dd May 4, 1995 33.Dt GETVFSBYNAME 3 34.Os 35.Sh NAME 36.Nm getvfsbyname 37.Nd get information about a filesystem 38.Sh LIBRARY 39.Lb libc 40.Sh SYNOPSIS 41.In sys/param.h 42.In sys/mount.h 43.Ft int 44.Fn getvfsbyname "const char *name" "struct vfsconf *vfc" 45.Sh DESCRIPTION 46The 47.Fn getvfsbyname 48function provides access to information about a 49filesystem module that is configured in the kernel. 50If successful, 51the requested filesystem 52.Fa vfsconf 53is returned in the location pointed to by 54.Fa vfc . 55The fields in a 56.Dq Li struct vfsconf 57are defined as follows: 58.Pp 59.Bl -tag -compact -width vfc_refcount 60.It vfc_name 61the name of the filesystem 62.It vfc_typenum 63the filesystem type number assigned by the kernel 64.It vfc_refcount 65the number of active mount points using the filesystem 66.It vfc_flags 67flag bits as described in 68.Xr getvfsent 3 69.El 70.Sh RETURN VALUES 71.Rv -std getvfsbyname 72.Sh ERRORS 73The following errors may be reported: 74.Bl -tag -width Er 75.It Bq Er EFAULT 76The 77.Fa vfc 78pointer contains an invalid address. 79.It Bq Er ENOENT 80The 81.Fa name 82specifies a filesystem that is unknown or not configured in the kernel. 83.El 84.Sh SEE ALSO 85.Xr mount 2 , 86.Xr getvfsent 3 , 87.Xr sysctl 3 , 88.Xr mount 8 , 89.Xr sysctl 8 90.Sh HISTORY 91A variant of the 92.Fn getvfsbyname 93function first appeared in 94.Fx 2.0 . 95