1 /*- 2 * Copyright (c) 2006 Dag-Erling Co�dan Sm�rgrav 3 * 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 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 30 #include <sys/param.h> 31 #include <sys/linker.h> 32 #include <sys/module.h> 33 34 #include <errno.h> 35 #include <libutil.h> 36 #include <string.h> 37 38 int 39 kld_isloaded(const char *name) 40 { 41 struct kld_file_stat fstat; 42 struct module_stat mstat; 43 const char *ko; 44 int fid, mid; 45 46 for (fid = kldnext(0); fid > 0; fid = kldnext(fid)) { 47 fstat.version = sizeof(fstat); 48 if (kldstat(fid, &fstat) != 0) 49 continue; 50 /* check if the file name matches the supplied name */ 51 if (strcmp(fstat.name, name) == 0) 52 return (1); 53 /* strip .ko and try again */ 54 if ((ko = strstr(fstat.name, ".ko")) != NULL && 55 strlen(name) == (size_t)(ko - fstat.name) && 56 strncmp(fstat.name, name, ko - fstat.name) == 0) 57 return (1); 58 /* look for a matching module within the file */ 59 for (mid = kldfirstmod(fid); mid > 0; mid = modfnext(mid)) { 60 mstat.version = sizeof(mstat); 61 if (modstat(mid, &mstat) != 0) 62 continue; 63 if (strcmp(mstat.name, name) == 0) 64 return (1); 65 } 66 } 67 return (0); 68 } 69 70 int 71 kld_load(const char *name) 72 { 73 if (kldload(name) == -1 && errno != EEXIST) 74 return (-1); 75 return (0); 76 } 77