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211 lines
5.0 KiB
C
211 lines
5.0 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini insmod implementation for busybox
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*
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* Copyright (C) 1999,2000 by Lineo, inc.
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* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include "internal.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <sys/syscall.h>
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#include <linux/module.h>
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#define _PATH_MODULES "/lib/modules"
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#warning "Danger Will Robinson, Danger!!!"
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#warning " "
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#warning "insmod is still under construction. Don't use it."
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#warning " "
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#warning " You have been warned!"
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#warning " "
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/* Some firendly syscalls to cheer everyone's day... */
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_syscall2(int, init_module, const char *, name,
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const struct module *, info)
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#ifndef BB_RMMOD
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_syscall1(int, delete_module, const char *, name)
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#else
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extern int delete_module(const char *);
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#endif
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#if defined(__i386__) || defined(__m68k__) || defined(__arm__)
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/* Jump through hoops to fixup error return codes */
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#define __NR__create_module __NR_create_module
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static inline _syscall2(long, _create_module, const char *, name, size_t,
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size)
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unsigned long create_module(const char *name, size_t size)
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{
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long ret = _create_module(name, size);
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if (ret == -1 && errno > 125) {
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ret = -errno;
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errno = 0;
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}
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return ret;
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}
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#else
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_syscall2(unsigned long, create_module, const char *, name, size_t, size)
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#endif
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static char m_filename[PATH_MAX + 1] = "\0";
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static char m_fullName[PATH_MAX + 1] = "\0";
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static const char insmod_usage[] =
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"insmod [OPTION]... MODULE [symbol=value]...\n\n"
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"Loads the specified kernel modules into the kernel.\n\n"
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"Options:\n"
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"\t-f\tForce module to load into the wrong kernel version.\n"
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"\t-k\tMake module autoclean-able.\n";
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static int findNamedModule(const char *fileName, struct stat *statbuf)
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{
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if (m_fullName[0] == '\0')
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return (FALSE);
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else {
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char *tmp = strrchr(fileName, '/');
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if (tmp == NULL)
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tmp = (char *) fileName;
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else
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tmp++;
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if (check_wildcard_match(tmp, m_fullName) == TRUE) {
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/* Stop searching if we find a match */
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memcpy(m_filename, fileName, strlen(fileName));
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return (FALSE);
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}
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}
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return (TRUE);
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}
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extern int insmod_main(int argc, char **argv)
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{
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int len;
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char *tmp;
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char m_name[PATH_MAX + 1] = "\0";
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FILE *fp;
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if (argc <= 1) {
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usage(insmod_usage);
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}
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/* Parse any options */
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while (--argc > 0 && **(++argv) == '-') {
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while (*(++(*argv))) {
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switch (**argv) {
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case 'f':
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break;
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case 'k':
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break;
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default:
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usage(insmod_usage);
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}
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}
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}
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if (argc <= 0)
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usage(insmod_usage);
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/* Grab the module name */
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if ((tmp = strrchr(*argv, '/')) != NULL)
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tmp++;
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else
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tmp = *argv;
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len = strlen(tmp);
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if (len > 2 && tmp[len - 2] == '.' && tmp[len - 1] == 'o')
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len -= 2;
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memcpy(m_name, tmp, len);
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strcpy(m_fullName, m_name);
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strcat(m_fullName, ".o");
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/* Get a filedesc for the module */
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if ((fp = fopen(*argv, "r")) == NULL) {
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/* Hmpf. Could not open it. Search through _PATH_MODULES to find a module named m_name */
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if (recursiveAction(_PATH_MODULES, TRUE, FALSE, FALSE,
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findNamedModule, findNamedModule) == FALSE) {
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if (m_filename[0] == '\0'
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|| ((fp = fopen(m_filename, "r")) == NULL)) {
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perror("No module by that name found in " _PATH_MODULES
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"\n");
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exit(FALSE);
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}
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}
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} else
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memcpy(m_filename, *argv, strlen(*argv));
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fprintf(stderr, "m_filename='%s'\n", m_filename);
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fprintf(stderr, "m_name='%s'\n", m_name);
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/* TODO: do something roughtly like this... */
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#if 0
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if ((f = obj_load(fp)) == NULL) {
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perror("Could not load the module\n");
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exit(FALSE);
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}
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/* Let the module know about the kernel symbols. */
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add_kernel_symbols(f);
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if (!create_this_module(f, m_name)) {
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perror("Could not create the module\n");
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exit(FALSE);
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}
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if (!obj_check_undefineds(f, quiet)) {
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perror("Undefined symbols in the module\n");
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exit(FALSE);
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}
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obj_allocate_commons(f);
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/* Perse the module's arguments */
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while (argc-- > 0 && *(argv++) != '\0') {
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if (!process_module_arguments(f, argc - optind, argv + optind)) {
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perror("Undefined symbols in the module\n");
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exit(FALSE);
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}
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}
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/* Find current size of the module */
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m_size = obj_load_size(f);
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errno = 0;
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m_addr = create_module(m_name, m_size);
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switch (errno) {
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/* yada yada */
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default:
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perror("create_module: %m");
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}
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#endif
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fclose(fp);
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exit(TRUE);
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}
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