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02479ead25
try to load modules by filename out of the current directory where the module in question may be further up the module path or not in the module path at all. Also add some text to the man page to help explain what's going on. Sponsored by: Redacted Consulting
188 lines
4.3 KiB
C
188 lines
4.3 KiB
C
/*-
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* Copyright (c) 1997 Doug Rabson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/linker.h>
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#include <sys/sysctl.h>
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#include <sys/stat.h>
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#define PATHCTL "kern.module_path"
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static int path_check(const char *, int);
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static void usage(void);
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/*
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* Check to see if the requested module is specified as a filename with no
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* path. If so and if a file by the same name exists in the module path,
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* warn the user that the module in the path will be used in preference.
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*/
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static int
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path_check(const char *kldname, int quiet)
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{
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int mib[5], found;
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size_t miblen, pathlen;
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char kldpath[MAXPATHLEN];
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char *path, *tmppath, *element;
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struct stat sb;
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dev_t dev;
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ino_t ino;
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if (strchr(kldname, '/') != NULL) {
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return (0);
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}
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if (strstr(kldname, ".ko") == NULL) {
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return (0);
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}
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if (stat(kldname, &sb) != 0) {
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return (0);
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}
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found = 0;
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dev = sb.st_dev;
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ino = sb.st_ino;
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miblen = sizeof(mib) / sizeof(mib[0]);
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if (sysctlnametomib(PATHCTL, mib, &miblen) != 0) {
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err(1, "sysctlnametomib(%s)", PATHCTL);
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}
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if (sysctl(mib, miblen, NULL, &pathlen, NULL, 0) == -1) {
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err(1, "getting path: sysctl(%s) - size only", PATHCTL);
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}
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path = malloc(pathlen + 1);
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if (path == NULL) {
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err(1, "allocating %lu bytes for the path",
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(unsigned long)pathlen + 1);
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}
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if (sysctl(mib, miblen, path, &pathlen, NULL, 0) == -1) {
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err(1, "getting path: sysctl(%s)", PATHCTL);
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}
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tmppath = path;
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while ((element = strsep(&tmppath, ";")) != NULL) {
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strlcpy(kldpath, element, MAXPATHLEN);
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if (kldpath[strlen(kldpath) - 1] != '/') {
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strlcat(kldpath, "/", MAXPATHLEN);
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}
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strlcat(kldpath, kldname, MAXPATHLEN);
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if (stat(kldpath, &sb) == -1) {
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continue;
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}
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found = 1;
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if (sb.st_dev != dev || sb.st_ino != ino) {
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if (!quiet) {
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warnx("%s will be loaded from %s, not the "
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"current directory", kldname, element);
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}
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break;
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} else if (sb.st_dev == dev && sb.st_ino == ino) {
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break;
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}
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}
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free(path);
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if (!found) {
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if (!quiet) {
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warnx("%s is not in the module path", kldname);
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}
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return (-1);
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}
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return (0);
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}
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static void
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usage(void)
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{
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fprintf(stderr, "usage: kldload [-v] file ...\n");
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exit(1);
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}
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int
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main(int argc, char** argv)
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{
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int c;
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int errors;
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int fileid;
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int verbose;
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int quiet;
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errors = 0;
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verbose = 0;
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quiet = 0;
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while ((c = getopt(argc, argv, "qv")) != -1) {
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switch (c) {
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case 'q':
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quiet = 1;
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verbose = 0;
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break;
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case 'v':
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verbose = 1;
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quiet = 0;
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break;
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (argc == 0)
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usage();
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while (argc-- != 0) {
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if (path_check(argv[0], quiet) == 0) {
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fileid = kldload(argv[0]);
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if (fileid < 0) {
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warn("can't load %s", argv[0]);
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errors++;
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} else {
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if (verbose)
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printf("Loaded %s, id=%d\n", argv[0],
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fileid);
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}
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} else {
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errors++;
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}
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argv++;
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}
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return (errors ? 1 : 0);
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}
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