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 34 #ifndef lint 35 #if 0 36 static char sccsid[] = "@(#)kvm_getvfsbyname.c 8.1 (Berkeley) 4/3/95"; 37 #endif 38 static const char rcsid[] = 39 "$FreeBSD$"; 40 #endif /* not lint */ 41 42 #include <sys/param.h> 43 #include <sys/mount.h> 44 #include <sys/sysctl.h> 45 #include <errno.h> 46 47 /* 48 * Given a filesystem name, determine if it is resident in the kernel, 49 * and if it is resident, return its vfsconf structure. 50 */ 51 getvfsbyname(fsname, vfcp) 52 const char *fsname; 53 struct vfsconf *vfcp; 54 { 55 #ifdef __NETBSD_SYSCALLS 56 errno = ENOSYS; 57 #else 58 int name[4], maxtypenum, cnt; 59 size_t buflen; 60 61 name[0] = CTL_VFS; 62 name[1] = VFS_GENERIC; 63 name[2] = VFS_MAXTYPENUM; 64 buflen = 4; 65 if (sysctl(name, 3, &maxtypenum, &buflen, (void *)0, (size_t)0) < 0) 66 return (-1); 67 name[2] = VFS_CONF; 68 buflen = sizeof *vfcp; 69 for (cnt = 0; cnt < maxtypenum; cnt++) { 70 name[3] = cnt; 71 if (sysctl(name, 4, vfcp, &buflen, (void *)0, (size_t)0) < 0) { 72 if (errno != EOPNOTSUPP) 73 return (-1); 74 continue; 75 } 76 if (!strcmp(fsname, vfcp->vfc_name)) 77 return (0); 78 } 79 errno = ENOENT; 80 #endif 81 return (-1); 82 } 83