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 #include <sys/types.h> 31 #include <sys/param.h> 32 #include <sys/linker.h> 33 #include <sys/sysctl.h> 34 #include <sys/stat.h> 35 #include <err.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 #include <string.h> 39 #include <unistd.h> 40 #include <errno.h> 41 42 #define PATHCTL "kern.module_path" 43 44 /* 45 * Check to see if the requested module is specified as a filename with no 46 * path. If so and if a file by the same name exists in the module path, 47 * warn the user that the module in the path will be used in preference. 48 */ 49 static int 50 path_check(const char *kldname, int quiet) 51 { 52 char *path, *tmppath, *element; 53 struct stat sb; 54 int mib[5]; 55 char kldpath[MAXPATHLEN]; 56 size_t miblen, pathlen; 57 dev_t dev; 58 ino_t ino; 59 int found; 60 61 if (strchr(kldname, '/') != NULL) 62 return (0); 63 if (strstr(kldname, ".ko") == NULL) 64 return (0); 65 if (stat(kldname, &sb) != 0) 66 return (0); 67 68 found = 0; 69 dev = sb.st_dev; 70 ino = sb.st_ino; 71 72 miblen = nitems(mib); 73 if (sysctlnametomib(PATHCTL, mib, &miblen) != 0) 74 err(1, "sysctlnametomib(%s)", PATHCTL); 75 if (sysctl(mib, miblen, NULL, &pathlen, NULL, 0) == -1) 76 err(1, "getting path: sysctl(%s) - size only", PATHCTL); 77 path = malloc(pathlen + 1); 78 if (path == NULL) 79 err(1, "allocating %lu bytes for the path", 80 (unsigned long)pathlen + 1); 81 if (sysctl(mib, miblen, path, &pathlen, NULL, 0) == -1) 82 err(1, "getting path: sysctl(%s)", PATHCTL); 83 tmppath = path; 84 85 while ((element = strsep(&tmppath, ";")) != NULL) { 86 strlcpy(kldpath, element, MAXPATHLEN); 87 if (kldpath[strlen(kldpath) - 1] != '/') { 88 strlcat(kldpath, "/", MAXPATHLEN); 89 } 90 strlcat(kldpath, kldname, MAXPATHLEN); 91 92 if (stat(kldpath, &sb) == -1) 93 continue; 94 95 found = 1; 96 97 if (sb.st_dev != dev || sb.st_ino != ino) { 98 if (!quiet) 99 warnx("%s will be loaded from %s, not the " 100 "current directory", kldname, element); 101 break; 102 } else if (sb.st_dev == dev && sb.st_ino == ino) 103 break; 104 } 105 106 free(path); 107 108 if (!found) { 109 if (!quiet) 110 warnx("%s is not in the module path", kldname); 111 return (-1); 112 } 113 114 return (0); 115 } 116 117 static void 118 usage(void) 119 { 120 121 fprintf(stderr, "usage: kldload [-nqv] file ...\n"); 122 exit(1); 123 } 124 125 int 126 main(int argc, char** argv) 127 { 128 int c; 129 int check_loaded; 130 int errors; 131 int fileid; 132 int quiet; 133 int verbose; 134 135 errors = 0; 136 verbose = 0; 137 quiet = 0; 138 check_loaded = 0; 139 140 while ((c = getopt(argc, argv, "nqv")) != -1) { 141 switch (c) { 142 case 'q': 143 quiet = 1; 144 verbose = 0; 145 break; 146 case 'v': 147 verbose = 1; 148 quiet = 0; 149 break; 150 case 'n': 151 check_loaded = 1; 152 break; 153 default: 154 usage(); 155 } 156 } 157 argc -= optind; 158 argv += optind; 159 160 if (argc == 0) 161 usage(); 162 163 while (argc-- != 0) { 164 if (path_check(argv[0], quiet) == 0) { 165 fileid = kldload(argv[0]); 166 if (fileid < 0) { 167 if (check_loaded != 0 && errno == EEXIST) { 168 if (verbose) 169 printf("%s is already " 170 "loaded\n", argv[0]); 171 } else { 172 if (!quiet) { 173 switch (errno) { 174 case EEXIST: 175 warnx("can't load %s: module " 176 "already loaded or " 177 "in kernel", argv[0]); 178 break; 179 case ENOEXEC: 180 warnx("an error occurred while " 181 "loading module %s. " 182 "Please check dmesg(8) for " 183 "more details.", argv[0]); 184 break; 185 default: 186 warn("can't load %s", argv[0]); 187 break; 188 } 189 } 190 errors++; 191 } 192 } else { 193 if (verbose) 194 printf("Loaded %s, id=%d\n", argv[0], 195 fileid); 196 } 197 } else 198 errors++; 199 argv++; 200 } 201 202 return (errors ? 1 : 0); 203 } 204