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