1 /* 2 * Copyright (c) 1995 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)kvm_getvfsbyname.c 8.1 (Berkeley) 4/3/95 34 * $FreeBSD: src/lib/libc/gen/getvfsbyname.c,v 1.5 1999/08/27 23:58:45 peter Exp $ 35 * $DragonFly: src/lib/libc/gen/getvfsbyname.c,v 1.4 2005/04/26 06:08:42 joerg Exp $ 36 */ 37 38 #include <sys/param.h> 39 #include <sys/mount.h> 40 #include <sys/sysctl.h> 41 #include <errno.h> 42 #include <string.h> 43 44 /* 45 * Given a filesystem name, determine if it is resident in the kernel, 46 * and if it is resident, return its vfsconf structure. 47 */ 48 int 49 getvfsbyname(const char *fsname, struct vfsconf *vfcp) 50 { 51 int name[4], maxtypenum, cnt; 52 size_t buflen; 53 54 name[0] = CTL_VFS; 55 name[1] = VFS_GENERIC; 56 name[2] = VFS_MAXTYPENUM; 57 buflen = 4; 58 if (sysctl(name, 3, &maxtypenum, &buflen, (void *)0, (size_t)0) < 0) 59 return (-1); 60 name[2] = VFS_CONF; 61 buflen = sizeof *vfcp; 62 for (cnt = 0; cnt < maxtypenum; cnt++) { 63 name[3] = cnt; 64 if (sysctl(name, 4, vfcp, &buflen, (void *)0, (size_t)0) < 0) { 65 if (errno != EOPNOTSUPP) 66 return (-1); 67 continue; 68 } 69 if (!strcmp(fsname, vfcp->vfc_name)) 70 return (0); 71 } 72 errno = ENOENT; 73 return (-1); 74 } 75