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 #if defined(LIBC_SCCS) && !defined(lint) 35 static char sccsid[] = "@(#)kvm_getvfsbyname.c 8.1 (Berkeley) 4/3/95"; 36 #endif /* LIBC_SCCS and not lint */ 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/param.h> 41 #include <sys/mount.h> 42 #include <sys/sysctl.h> 43 #include <errno.h> 44 #include <stdlib.h> 45 #include <string.h> 46 47 /* 48 * Given a filesystem name, determine if it is resident in the kernel, 49 * and if it is resident, return its xvfsconf structure. 50 */ 51 int 52 getvfsbyname(fsname, vfcp) 53 const char *fsname; 54 struct xvfsconf *vfcp; 55 { 56 struct xvfsconf *xvfsp; 57 size_t buflen; 58 int cnt, i; 59 60 if (sysctlbyname("vfs.conflist", NULL, &buflen, NULL, 0) < 0) 61 return (-1); 62 xvfsp = malloc(buflen); 63 if (xvfsp == NULL) 64 return (-1); 65 if (sysctlbyname("vfs.conflist", xvfsp, &buflen, NULL, 0) < 0) { 66 free(xvfsp); 67 return (-1); 68 } 69 cnt = buflen / sizeof(struct xvfsconf); 70 for (i = 0; i < cnt; i++) { 71 if (strcmp(fsname, xvfsp[i].vfc_name) == 0) { 72 memcpy(vfcp, xvfsp + i, sizeof(struct xvfsconf)); 73 free(xvfsp); 74 return (0); 75 } 76 } 77 free(xvfsp); 78 errno = ENOENT; 79 return (-1); 80 } 81