summaryrefslogtreecommitdiff
path: root/modutils/insmod.c
blob: 31cb1126193617bb75f0967cb22fd17688397cf7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
/*
 * 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);
}