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 $
29 #include <sys/param.h>
30 #include <sys/types.h>
31 #include <sys/queue.h>
32 #include <sys/sysctl.h>
42 #define NEED_SLASHTERM
44 /* the default sysctl name */
45 #define PATHCTL "kern.module_path"
47 /* queue structure for the module path broken down into components */
48 TAILQ_HEAD(pathhead, pathentry);
51 TAILQ_ENTRY(pathentry) next;
54 /* the Management Information Base entries for the search path sysctl */
57 /* the sysctl name, defaults to PATHCTL */
59 /* the sysctl value - the current module search path */
61 /* flag whether user actions require changing the sysctl value */
64 /* Top-level path management functions */
65 static void addpath(struct pathhead *, char *, int, int);
66 static void rempath(struct pathhead *, char *, int, int);
67 static void showpath(struct pathhead *);
69 /* Low-level path management functions */
70 static char *qstring(struct pathhead *);
72 /* sysctl-related functions */
73 static void getmib(void);
74 static void getpath(void);
75 static void parsepath(struct pathhead *, char *, int);
76 static void setpath(struct pathhead *);
78 static void usage(void);
80 /* Get the MIB entry for our sysctl */
85 /* have we already fetched it? */
89 miblen = sizeof(mib) / sizeof(mib[0]);
90 if (sysctlnametomib(pathctl, mib, &miblen) != 0)
91 err(1, "sysctlnametomib(%s)", pathctl);
94 /* Get the current module search path */
101 if (modpath != NULL) {
108 if (sysctl(mib, miblen, NULL, &sz, NULL, 0) == -1)
109 err(1, "getting path: sysctl(%s) - size only", pathctl);
110 if ((path = malloc(sz + 1)) == NULL) {
112 err(1, "allocating %lu bytes for the path",
113 (unsigned long)sz+1);
115 if (sysctl(mib, miblen, path, &sz, NULL, 0) == -1)
116 err(1, "getting path: sysctl(%s)", pathctl);
120 /* Set the module search path after changing it */
122 setpath(struct pathhead *pathq)
128 if ((newpath = qstring(pathq)) == NULL) {
130 err(1, "building path string");
132 if (sysctl(mib, miblen, NULL, NULL, newpath, strlen(newpath)+1) == -1)
133 err(1, "setting path: sysctl(%s)", pathctl);
140 /* Add/insert a new component to the module search path */
142 addpath(struct pathhead *pathq, char *path, int force, int insert)
144 struct pathentry *pe, *pskip;
145 char pathbuf[MAXPATHLEN+1];
147 static unsigned added = 0;
151 * If the path exists, use it; otherwise, take the user-specified
152 * path at face value - may be a removed directory.
154 if (realpath(path, pathbuf) == NULL)
155 strlcpy(pathbuf, path, sizeof(pathbuf));
157 len = strlen(pathbuf);
158 #ifdef NEED_SLASHTERM
159 /* slash-terminate, because the kernel linker said so. */
160 if ((len == 0) || (pathbuf[len-1] != '/')) {
161 if (len == sizeof(pathbuf) - 1)
162 errx(1, "path too long: %s", pathbuf);
165 #else /* NEED_SLASHTERM */
166 /* remove a terminating slash if present */
167 if ((len > 0) && (pathbuf[len-1] == '/'))
168 pathbuf[--len] = '\0';
169 #endif /* NEED_SLASHTERM */
171 /* is it already in there? */
172 TAILQ_FOREACH(pe, pathq, next)
173 if (!strcmp(pe->path, pathbuf))
178 errx(1, "already in the module search path: %s", pathbuf);
181 /* OK, allocate and add it. */
182 if (((pe = malloc(sizeof(*pe))) == NULL) ||
183 ((pe->path = strdup(pathbuf)) == NULL)) {
185 err(1, "allocating path component");
188 TAILQ_INSERT_TAIL(pathq, pe, next);
190 for (i = 0, pskip = TAILQ_FIRST(pathq); i < added; i++)
191 pskip = TAILQ_NEXT(pskip, next);
193 TAILQ_INSERT_BEFORE(pskip, pe, next);
195 TAILQ_INSERT_TAIL(pathq, pe, next);
201 /* Remove a path component from the module search path */
203 rempath(struct pathhead *pathq, char *path, int force, int insert __unused)
205 char pathbuf[MAXPATHLEN+1];
206 struct pathentry *pe;
209 /* same logic as in addpath() */
210 if (realpath(path, pathbuf) == NULL)
211 strlcpy(pathbuf, path, sizeof(pathbuf));
213 len = strlen(pathbuf);
214 #ifdef NEED_SLASHTERM
215 /* slash-terminate, because the kernel linker said so. */
216 if ((len == 0) || (pathbuf[len-1] != '/')) {
217 if (len == sizeof(pathbuf) - 1)
218 errx(1, "path too long: %s", pathbuf);
221 #else /* NEED_SLASHTERM */
222 /* remove a terminating slash if present */
223 if ((len > 0) && (pathbuf[len-1] == '/'))
224 pathbuf[--len] = '\0';
225 #endif /* NEED_SLASHTERM */
227 /* Is it in there? */
228 TAILQ_FOREACH(pe, pathq, next)
229 if (!strcmp(pe->path, pathbuf))
234 errx(1, "not in module search path: %s", pathbuf);
237 /* OK, remove it now.. */
238 TAILQ_REMOVE(pathq, pe, next);
242 /* Display the retrieved module search path */
244 showpath(struct pathhead *pathq)
248 if ((s = qstring(pathq)) == NULL) {
250 err(1, "building path string");
256 /* Break a string down into path components, store them into a queue */
258 parsepath(struct pathhead *pathq, char *path, int uniq)
261 struct pathentry *pe;
263 while ((p = strsep(&path, ";")) != NULL)
265 if (((pe = malloc(sizeof(*pe))) == NULL) ||
266 ((pe->path = strdup(p)) == NULL)) {
268 err(1, "allocating path element");
270 TAILQ_INSERT_TAIL(pathq, pe, next);
272 addpath(pathq, p, 1, 0);
276 /* Recreate a path string from a components queue */
278 qstring(struct pathhead *pathq)
281 struct pathentry *pe;
284 TAILQ_FOREACH(pe, pathq, next) {
285 asprintf(&p, "%s%s%s",
286 s, pe->path, (TAILQ_NEXT(pe, next) != NULL? ";": ""));
301 fprintf(stderr, "%s\n%s\n",
302 "usage:\tkldconfig [-dfimnUv] [-S sysctlname] [path..]",
309 main(int argc, char *argv[])
311 /* getopt() iterator */
313 /* iterator over argv[] path components */
315 /* Command-line flags: */
316 /* "-f" - no diagnostic messages */
318 /* "-i" - insert before the first element */
320 /* "-m" - merge into the existing path, do not replace it */
322 /* "-n" - do not actually set the new module path */
324 /* "-r" - print out the current search path */
326 /* "-U" - remove duplicate values from the path */
328 /* "-v" - verbose operation (currently a no-op) */
330 /* The higher-level function to call - add/remove */
331 void (*act)(struct pathhead *, char *, int, int);
332 /* The original path */
334 /* The module search path broken down into components */
335 struct pathhead pathq;
337 fflag = iflag = mflag = nflag = rflag = uniqflag = vflag = 0;
340 if ((pathctl = strdup(PATHCTL)) == NULL) {
341 /* this is just too paranoid ;) */
343 err(1, "initializing sysctl name %s", PATHCTL);
346 /* If no arguments and no options are specified, force '-m' */
350 while ((c = getopt(argc, argv, "dfimnrS:Uv")) != -1)
378 if ((pathctl = strdup(optarg)) == NULL) {
380 err(1, "sysctl name %s", optarg);
396 /* The '-r' flag cannot be used when paths are also specified */
397 if (rflag && (argc > 0))
402 /* Retrieve and store the path from the sysctl value */
404 if ((origpath = strdup(modpath)) == NULL) {
406 err(1, "saving the original search path");
410 * Break down the path into the components queue if:
411 * - we are NOT adding paths, OR
412 * - the 'merge' flag is specified, OR
413 * - the 'print only' flag is specified, OR
414 * - the 'unique' flag is specified.
416 if ((act != addpath) || mflag || rflag || uniqflag)
417 parsepath(&pathq, modpath, uniqflag);
418 else if (modpath[0] != '\0')
421 /* Process the path arguments */
422 for (i = 0; i < argc; i++)
423 act(&pathq, argv[i], fflag, iflag);
425 if (changed && !nflag)
428 if (rflag || (changed && vflag)) {
429 if (changed && (vflag > 1))
430 printf("%s -> ", origpath);