1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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
path_check(const char * kldname,int quiet)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
usage(void)120 usage(void)
121 {
122
123 fprintf(stderr, "usage: kldload [-nqv] file ...\n");
124 exit(1);
125 }
126
127 int
main(int argc,char ** argv)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 switch (errno) {
175 case EEXIST:
176 warnx("can't load %s: module "
177 "already loaded or "
178 "in kernel", argv[0]);
179 break;
180 case ENOEXEC:
181 warnx("an error occurred while "
182 "loading module %s. "
183 "Please check dmesg(8) for "
184 "more details.", argv[0]);
185 break;
186 default:
187 warn("can't load %s", argv[0]);
188 break;
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