1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 1997 Doug Rabson 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 * 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/types.h> 33 #include <sys/param.h> 34 #include <sys/linker.h> 35 #include <sys/sysctl.h> 36 #include <sys/stat.h> 37 #include <err.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <unistd.h> 42 #include <errno.h> 43 44 #define PATHCTL "kern.module_path" 45 46 /* 47 * Check to see if the requested module is specified as a filename with no 48 * path. If so and if a file by the same name exists in the module path, 49 * warn the user that the module in the path will be used in preference. 50 */ 51 static int 52 path_check(const char *kldname, int quiet) 53 { 54 char *path, *tmppath, *element; 55 struct stat sb; 56 int mib[5]; 57 char kldpath[MAXPATHLEN]; 58 size_t miblen, pathlen; 59 dev_t dev; 60 ino_t ino; 61 int found; 62 63 if (strchr(kldname, '/') != NULL) 64 return (0); 65 if (strstr(kldname, ".ko") == NULL) 66 return (0); 67 if (stat(kldname, &sb) != 0) 68 return (0); 69 70 found = 0; 71 dev = sb.st_dev; 72 ino = sb.st_ino; 73 74 miblen = nitems(mib); 75 if (sysctlnametomib(PATHCTL, mib, &miblen) != 0) 76 err(1, "sysctlnametomib(%s)", PATHCTL); 77 if (sysctl(mib, miblen, NULL, &pathlen, NULL, 0) == -1) 78 err(1, "getting path: sysctl(%s) - size only", PATHCTL); 79 path = malloc(pathlen + 1); 80 if (path == NULL) 81 err(1, "allocating %lu bytes for the path", 82 (unsigned long)pathlen + 1); 83 if (sysctl(mib, miblen, path, &pathlen, NULL, 0) == -1) 84 err(1, "getting path: sysctl(%s)", PATHCTL); 85 tmppath = path; 86 87 while ((element = strsep(&tmppath, ";")) != NULL) { 88 strlcpy(kldpath, element, MAXPATHLEN); 89 if (kldpath[strlen(kldpath) - 1] != '/') { 90 strlcat(kldpath, "/", MAXPATHLEN); 91 } 92 strlcat(kldpath, kldname, MAXPATHLEN); 93 94 if (stat(kldpath, &sb) == -1) 95 continue; 96 97 found = 1; 98 99 if (sb.st_dev != dev || sb.st_ino != ino) { 100 if (!quiet) 101 warnx("%s will be loaded from %s, not the " 102 "current directory", kldname, element); 103 break; 104 } else if (sb.st_dev == dev && sb.st_ino == ino) 105 break; 106 } 107 108 free(path); 109 110 if (!found) { 111 if (!quiet) 112 warnx("%s is not in the module path", kldname); 113 return (-1); 114 } 115 116 return (0); 117 } 118 119 static void 120 usage(void) 121 { 122 123 fprintf(stderr, "usage: kldload [-nqv] file ...\n"); 124 exit(1); 125 } 126 127 int 128 main(int argc, char** argv) 129 { 130 int c; 131 int check_loaded; 132 int errors; 133 int fileid; 134 int quiet; 135 int verbose; 136 137 errors = 0; 138 verbose = 0; 139 quiet = 0; 140 check_loaded = 0; 141 142 while ((c = getopt(argc, argv, "nqv")) != -1) { 143 switch (c) { 144 case 'q': 145 quiet = 1; 146 verbose = 0; 147 break; 148 case 'v': 149 verbose = 1; 150 quiet = 0; 151 break; 152 case 'n': 153 check_loaded = 1; 154 break; 155 default: 156 usage(); 157 } 158 } 159 argc -= optind; 160 argv += optind; 161 162 if (argc == 0) 163 usage(); 164 165 while (argc-- != 0) { 166 if (path_check(argv[0], quiet) == 0) { 167 fileid = kldload(argv[0]); 168 if (fileid < 0) { 169 if (check_loaded != 0 && errno == EEXIST) { 170 if (verbose) 171 printf("%s is already " 172 "loaded\n", argv[0]); 173 } else { 174 if (!quiet) { 175 switch (errno) { 176 case EEXIST: 177 warnx("can't load %s: module " 178 "already loaded or " 179 "in kernel", argv[0]); 180 break; 181 case ENOEXEC: 182 warnx("an error occurred while " 183 "loading module %s. " 184 "Please check dmesg(8) for " 185 "more details.", argv[0]); 186 break; 187 default: 188 warn("can't load %s", argv[0]); 189 break; 190 } 191 } 192 errors++; 193 } 194 } else { 195 if (verbose) 196 printf("Loaded %s, id=%d\n", argv[0], 197 fileid); 198 } 199 } else 200 errors++; 201 argv++; 202 } 203 204 return (errors ? 1 : 0); 205 } 206