2 * SPDX-License-Identifier: BSD-3-Clause
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include <sys/cdefs.h>
33 __SCCSID("@(#)kvm_getvfsbyname.c 8.1 (Berkeley) 4/3/95");
34 __FBSDID("$FreeBSD$");
36 #include <sys/param.h>
37 #include <sys/mount.h>
38 #include <sys/sysctl.h>
45 * fusefs(5) file systems may have a "subtype" which gets appended to
46 * statfs(2)'s f_fstypename field on a per-mount basis. Allow getvfsbyname to
47 * match either the full "fusefs.foobar" or the more general "fusefs".
50 are_fusefs(const char *fsname, const char *vfc_name)
52 const char fusefs[] = "fusefs";
53 const char fusefs_dot[] = "fusefs.";
55 return (strncmp(fsname, fusefs_dot, strlen(fusefs_dot)) == 0 &&
56 strcmp(fusefs, vfc_name) == 0);
60 * Given a filesystem name, determine if it is resident in the kernel,
61 * and if it is resident, return its xvfsconf structure.
64 getvfsbyname(const char *fsname, struct xvfsconf *vfcp)
66 struct xvfsconf *xvfsp;
70 if (sysctlbyname("vfs.conflist", NULL, &buflen, NULL, 0) < 0)
72 xvfsp = malloc(buflen);
75 if (sysctlbyname("vfs.conflist", xvfsp, &buflen, NULL, 0) < 0) {
79 cnt = buflen / sizeof(struct xvfsconf);
80 for (i = 0; i < cnt; i++) {
81 if (strcmp(fsname, xvfsp[i].vfc_name) == 0 ||
82 are_fusefs(fsname, xvfsp[i].vfc_name))
84 memcpy(vfcp, xvfsp + i, sizeof(struct xvfsconf));