1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2006 Dag-Erling Coïdan Smørgrav 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer 12 * in this position and unchanged. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 * $FreeBSD$ 30 */ 31 32 #include <sys/param.h> 33 #include <sys/linker.h> 34 #include <sys/module.h> 35 36 #include <errno.h> 37 #include <libutil.h> 38 #include <string.h> 39 40 int 41 kld_isloaded(const char *name) 42 { 43 struct kld_file_stat fstat; 44 struct module_stat mstat; 45 const char *ko; 46 int fid, mid; 47 48 for (fid = kldnext(0); fid > 0; fid = kldnext(fid)) { 49 fstat.version = sizeof(fstat); 50 if (kldstat(fid, &fstat) != 0) 51 continue; 52 /* check if the file name matches the supplied name */ 53 if (strcmp(fstat.name, name) == 0) 54 return (1); 55 /* strip .ko and try again */ 56 if ((ko = strstr(fstat.name, ".ko")) != NULL && 57 strlen(name) == (size_t)(ko - fstat.name) && 58 strncmp(fstat.name, name, ko - fstat.name) == 0) 59 return (1); 60 /* look for a matching module within the file */ 61 for (mid = kldfirstmod(fid); mid > 0; mid = modfnext(mid)) { 62 mstat.version = sizeof(mstat); 63 if (modstat(mid, &mstat) != 0) 64 continue; 65 if (strcmp(mstat.name, name) == 0) 66 return (1); 67 } 68 } 69 return (0); 70 } 71 72 int 73 kld_load(const char *name) 74 { 75 if (kldload(name) == -1 && errno != EEXIST) 76 return (-1); 77 return (0); 78 } 79