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