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 30 #if defined(LIBC_SCCS) && !defined(lint) 31 static char sccsid[] = "@(#)kvm_getvfsbyname.c 8.1 (Berkeley) 4/3/95"; 32 #endif /* LIBC_SCCS and not lint */ 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <sys/param.h> 37 #include <sys/mount.h> 38 #include <sys/sysctl.h> 39 #include <errno.h> 40 #include <stdlib.h> 41 #include <string.h> 42 43 /* 44 * Given a filesystem name, determine if it is resident in the kernel, 45 * and if it is resident, return its xvfsconf structure. 46 */ 47 int 48 getvfsbyname(const char *fsname, struct xvfsconf *vfcp) 49 { 50 struct xvfsconf *xvfsp; 51 size_t buflen; 52 int cnt, i; 53 54 if (sysctlbyname("vfs.conflist", NULL, &buflen, NULL, 0) < 0) 55 return (-1); 56 xvfsp = malloc(buflen); 57 if (xvfsp == NULL) 58 return (-1); 59 if (sysctlbyname("vfs.conflist", xvfsp, &buflen, NULL, 0) < 0) { 60 free(xvfsp); 61 return (-1); 62 } 63 cnt = buflen / sizeof(struct xvfsconf); 64 for (i = 0; i < cnt; i++) { 65 if (strcmp(fsname, xvfsp[i].vfc_name) == 0) { 66 memcpy(vfcp, xvfsp + i, sizeof(struct xvfsconf)); 67 free(xvfsp); 68 return (0); 69 } 70 } 71 free(xvfsp); 72 errno = ENOENT; 73 return (-1); 74 } 75