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