1/* 2 * Copyright (c) 2000-2011 Apple Inc. All rights reserved. 3 * 4 * @APPLE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. Please obtain a copy of the License at 10 * http://www.opensource.apple.com/apsl/ and read it before using this 11 * file. 12 * 13 * The Original Code and all software distributed under the License are 14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 18 * Please see the License for the specific language governing rights and 19 * limitations under the License. 20 * 21 * @APPLE_LICENSE_HEADER_END@ 22 */ 23 24#include <string.h> 25#include <sys/mount.h> 26#include <sys/sysctl.h> 27 28#include "sysctl_fsid.h" 29 30int 31sysctl_fsid(int op, fsid_t *fsid, void *oldp, size_t *oldlenp, void *newp, 32 size_t newlen) 33{ 34 int ctlname[CTL_MAXNAME+2]; 35 size_t ctllen; 36 const char *sysstr = "vfs.generic.ctlbyfsid"; 37 struct vfsidctl vc; 38 39 ctllen = CTL_MAXNAME+2; 40 if (sysctlnametomib(sysstr, ctlname, &ctllen) == -1) 41 return (-1); 42 ctlname[ctllen] = op; 43 44 memset(&vc, 0, sizeof(vc)); 45 vc.vc_vers = VFS_CTL_VERS1; 46 vc.vc_fsid = *fsid; 47 vc.vc_ptr = newp; 48 vc.vc_len = newlen; 49 return (sysctl(ctlname, (u_int)ctllen + 1, oldp, oldlenp, &vc, 50 sizeof(vc))); 51} 52