2 * Copyright (c) 2001 Peter Pentchev
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/sbin/kldconfig/kldconfig.c,v 1.3.2.1 2001/08/01 05:52:36 obrien Exp $
27 * $DragonFly: src/sbin/kldconfig/kldconfig.c,v 1.4 2007/11/25 18:10:07 swildner Exp $
30 #include <sys/param.h>
31 #include <sys/types.h>
32 #include <sys/queue.h>
33 #include <sys/sysctl.h>
43 #if defined(__FreeBSD_version)
44 #if __FreeBSD_version < 500000
45 #define NEED_SLASHTERM
47 #else /* defined(__FreeBSD_version) */
49 #define NEED_SLASHTERM
50 #endif /* defined(__FreeBSD_version) */
52 /* the default sysctl name */
53 #define PATHCTL "kern.module_path"
55 /* queue structure for the module path broken down into components */
56 TAILQ_HEAD(pathhead, pathentry);
59 TAILQ_ENTRY(pathentry) next;
62 /* the Management Information Base entries for the search path sysctl */
65 /* the sysctl name, defaults to PATHCTL */
67 /* the sysctl value - the current module search path */
69 /* flag whether user actions require changing the sysctl value */
72 /* Top-level path management functions */
73 static void addpath(struct pathhead *, char *, int, int);
74 static void rempath(struct pathhead *, char *, int, int);
75 static void showpath(struct pathhead *);
77 /* Low-level path management functions */
78 static char *qstring(struct pathhead *);
80 /* sysctl-related functions */
81 static void getmib(void);
82 static void getpath(void);
83 static void parsepath(struct pathhead *, char *, int);
84 static void setpath(struct pathhead *);
86 static void usage(void);
88 /* Get the MIB entry for our sysctl */
93 /* have we already fetched it? */
97 miblen = sizeof(mib) / sizeof(mib[0]);
98 if (sysctlnametomib(pathctl, mib, &miblen) != 0)
99 err(1, "sysctlnametomib(%s)", pathctl);
102 /* Get the current module search path */
109 if (modpath != NULL) {
116 if (sysctl(mib, miblen, NULL, &sz, NULL, 0) == -1)
117 err(1, "getting path: sysctl(%s) - size only", pathctl);
118 if ((path = malloc(sz + 1)) == NULL) {
120 err(1, "allocating %lu bytes for the path",
121 (unsigned long)sz+1);
123 if (sysctl(mib, miblen, path, &sz, NULL, 0) == -1)
124 err(1, "getting path: sysctl(%s)", pathctl);
128 /* Set the module search path after changing it */
130 setpath(struct pathhead *pathq)
136 if ((newpath = qstring(pathq)) == NULL) {
138 err(1, "building path string");
140 if (sysctl(mib, miblen, NULL, NULL, newpath, strlen(newpath)+1) == -1)
141 err(1, "setting path: sysctl(%s)", pathctl);
148 /* Add/insert a new component to the module search path */
150 addpath(struct pathhead *pathq, char *path, int force, int insert)
152 struct pathentry *pe, *pskip;
153 char pathbuf[MAXPATHLEN+1];
155 static unsigned added = 0;
159 * If the path exists, use it; otherwise, take the user-specified
160 * path at face value - may be a removed directory.
162 if (realpath(path, pathbuf) == NULL)
163 strlcpy(pathbuf, path, sizeof(pathbuf));
165 len = strlen(pathbuf);
166 #ifdef NEED_SLASHTERM
167 /* slash-terminate, because the kernel linker said so. */
168 if ((len == 0) || (pathbuf[len-1] != '/')) {
169 if (len == sizeof(pathbuf) - 1)
170 errx(1, "path too long: %s", pathbuf);
173 #else /* NEED_SLASHTERM */
174 /* remove a terminating slash if present */
175 if ((len > 0) && (pathbuf[len-1] == '/'))
176 pathbuf[--len] = '\0';
177 #endif /* NEED_SLASHTERM */
179 /* is it already in there? */
180 TAILQ_FOREACH(pe, pathq, next)
181 if (!strcmp(pe->path, pathbuf))
186 errx(1, "already in the module search path: %s", pathbuf);
189 /* OK, allocate and add it. */
190 if (((pe = malloc(sizeof(*pe))) == NULL) ||
191 ((pe->path = strdup(pathbuf)) == NULL)) {
193 err(1, "allocating path component");
196 TAILQ_INSERT_TAIL(pathq, pe, next);
198 for (i = 0, pskip = TAILQ_FIRST(pathq); i < added; i++)
199 pskip = TAILQ_NEXT(pskip, next);
201 TAILQ_INSERT_BEFORE(pskip, pe, next);
203 TAILQ_INSERT_TAIL(pathq, pe, next);
209 /* Remove a path component from the module search path */
211 rempath(struct pathhead *pathq, char *path, int force, int insert __unused)
213 char pathbuf[MAXPATHLEN+1];
214 struct pathentry *pe;
217 /* same logic as in addpath() */
218 if (realpath(path, pathbuf) == NULL)
219 strlcpy(pathbuf, path, sizeof(pathbuf));
221 len = strlen(pathbuf);
222 #ifdef NEED_SLASHTERM
223 /* slash-terminate, because the kernel linker said so. */
224 if ((len == 0) || (pathbuf[len-1] != '/')) {
225 if (len == sizeof(pathbuf) - 1)
226 errx(1, "path too long: %s", pathbuf);
229 #else /* NEED_SLASHTERM */
230 /* remove a terminating slash if present */
231 if ((len > 0) && (pathbuf[len-1] == '/'))
232 pathbuf[--len] = '\0';
233 #endif /* NEED_SLASHTERM */
235 /* Is it in there? */
236 TAILQ_FOREACH(pe, pathq, next)
237 if (!strcmp(pe->path, pathbuf))
242 errx(1, "not in module search path: %s", pathbuf);
245 /* OK, remove it now.. */
246 TAILQ_REMOVE(pathq, pe, next);
250 /* Display the retrieved module search path */
252 showpath(struct pathhead *pathq)
256 if ((s = qstring(pathq)) == NULL) {
258 err(1, "building path string");
264 /* Break a string down into path components, store them into a queue */
266 parsepath(struct pathhead *pathq, char *path, int uniq)
269 struct pathentry *pe;
271 while ((p = strsep(&path, ";")) != NULL)
273 if (((pe = malloc(sizeof(*pe))) == NULL) ||
274 ((pe->path = strdup(p)) == NULL)) {
276 err(1, "allocating path element");
278 TAILQ_INSERT_TAIL(pathq, pe, next);
280 addpath(pathq, p, 1, 0);
284 /* Recreate a path string from a components queue */
286 qstring(struct pathhead *pathq)
289 struct pathentry *pe;
292 TAILQ_FOREACH(pe, pathq, next) {
293 asprintf(&p, "%s%s%s",
294 s, pe->path, (TAILQ_NEXT(pe, next) != NULL? ";": ""));
309 fprintf(stderr, "%s\n%s\n",
310 "usage:\tkldconfig [-dfimnUv] [-S sysctlname] [path..]",
317 main(int argc, char *argv[])
319 /* getopt() iterator */
321 /* iterator over argv[] path components */
323 /* Command-line flags: */
324 /* "-f" - no diagnostic messages */
326 /* "-i" - insert before the first element */
328 /* "-m" - merge into the existing path, do not replace it */
330 /* "-n" - do not actually set the new module path */
332 /* "-r" - print out the current search path */
334 /* "-U" - remove duplicate values from the path */
336 /* "-v" - verbose operation (currently a no-op) */
338 /* The higher-level function to call - add/remove */
339 void (*act)(struct pathhead *, char *, int, int);
340 /* The original path */
342 /* The module search path broken down into components */
343 struct pathhead pathq;
345 fflag = iflag = mflag = nflag = rflag = uniqflag = vflag = 0;
348 if ((pathctl = strdup(PATHCTL)) == NULL) {
349 /* this is just too paranoid ;) */
351 err(1, "initializing sysctl name %s", PATHCTL);
354 /* If no arguments and no options are specified, force '-m' */
358 while ((c = getopt(argc, argv, "dfimnrS:Uv")) != -1)
386 if ((pathctl = strdup(optarg)) == NULL) {
388 err(1, "sysctl name %s", optarg);
404 /* The '-r' flag cannot be used when paths are also specified */
405 if (rflag && (argc > 0))
410 /* Retrieve and store the path from the sysctl value */
412 if ((origpath = strdup(modpath)) == NULL) {
414 err(1, "saving the original search path");
418 * Break down the path into the components queue if:
419 * - we are NOT adding paths, OR
420 * - the 'merge' flag is specified, OR
421 * - the 'print only' flag is specified, OR
422 * - the 'unique' flag is specified.
424 if ((act != addpath) || mflag || rflag || uniqflag)
425 parsepath(&pathq, modpath, uniqflag);
426 else if (modpath[0] != '\0')
429 /* Process the path arguments */
430 for (i = 0; i < argc; i++)
431 act(&pathq, argv[i], fflag, iflag);
433 if (changed && !nflag)
436 if (rflag || (changed && vflag)) {
437 if (changed && (vflag > 1))
438 printf("%s -> ", origpath);