8be9a344bd
MFC after: 1 week
200 lines
4.5 KiB
C
200 lines
4.5 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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#include <errno.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 [-nqv] 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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int check_loaded;
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errors = 0;
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verbose = 0;
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quiet = 0;
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check_loaded = 0;
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while ((c = getopt(argc, argv, "nqv")) != -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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case 'n':
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check_loaded = 1;
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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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if (check_loaded != 0 && errno == EEXIST) {
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if (verbose)
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printf("%s is already "
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"loaded\n", argv[0]);
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} else {
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warn("can't load %s", argv[0]);
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errors++;
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}
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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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