mirror of
https://github.com/sheumann/hush.git
synced 2024-12-22 14:30:31 +00:00
621 lines
13 KiB
C
621 lines
13 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Modprobe written from scratch for BusyBox
|
|
*
|
|
* Copyright (c) 2002 by Robert Griebl, griebl@gmx.de
|
|
* Copyright (c) 2003 by Andrew Dennison, andrew.dennison@motec.com.au
|
|
*
|
|
* 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 <sys/utsname.h>
|
|
#include <getopt.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <syslog.h>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
#include <fcntl.h>
|
|
#include "busybox.h"
|
|
|
|
|
|
|
|
struct dep_t {
|
|
char * m_module;
|
|
char * m_options;
|
|
|
|
int m_isalias : 1;
|
|
int m_reserved : 15;
|
|
|
|
int m_depcnt : 16;
|
|
char ** m_deparr;
|
|
|
|
struct dep_t * m_next;
|
|
};
|
|
|
|
struct mod_list_t {
|
|
char * m_module;
|
|
char * m_options;
|
|
|
|
struct mod_list_t * m_prev;
|
|
struct mod_list_t * m_next;
|
|
};
|
|
|
|
|
|
static struct dep_t *depend;
|
|
static int autoclean, show_only, quiet, do_syslog, verbose;
|
|
static int k_version;
|
|
|
|
int parse_tag_value ( char *buffer, char **ptag, char **pvalue )
|
|
{
|
|
char *tag, *value;
|
|
|
|
while ( isspace ( *buffer ))
|
|
buffer++;
|
|
tag = value = buffer;
|
|
while ( !isspace ( *value ))
|
|
value++;
|
|
*value++ = 0;
|
|
while ( isspace ( *value ))
|
|
value++;
|
|
|
|
*ptag = tag;
|
|
*pvalue = value;
|
|
|
|
return bb_strlen( tag ) && bb_strlen( value );
|
|
}
|
|
|
|
/* Jump through hoops to simulate how fgets() grabs just one line at a
|
|
* time... Don't use any stdio since modprobe gets called from a kernel
|
|
* thread and stdio junk can overflow the limited stack...
|
|
*/
|
|
static char *reads ( int fd, char *buffer, size_t len )
|
|
{
|
|
int n = read ( fd, buffer, len );
|
|
|
|
if ( n > 0 ) {
|
|
char *p;
|
|
|
|
buffer [len-1] = 0;
|
|
p = strchr ( buffer, '\n' );
|
|
|
|
if ( p ) {
|
|
off_t offset;
|
|
|
|
offset = lseek ( fd, 0L, SEEK_CUR ); // Get the current file descriptor offset
|
|
lseek ( fd, offset-n + (p-buffer) + 1, SEEK_SET ); // Set the file descriptor offset to right after the \n
|
|
|
|
p[1] = 0;
|
|
}
|
|
return buffer;
|
|
}
|
|
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static struct dep_t *build_dep ( void )
|
|
{
|
|
int fd;
|
|
struct utsname un;
|
|
struct dep_t *first = 0;
|
|
struct dep_t *current = 0;
|
|
char buffer[256];
|
|
char *filename = buffer;
|
|
int continuation_line = 0;
|
|
|
|
k_version = 0;
|
|
if ( uname ( &un ))
|
|
return 0;
|
|
|
|
// check for buffer overflow in following code
|
|
if ( bb_strlen ( un.release ) > ( sizeof( buffer ) - 64 )) {
|
|
return 0;
|
|
}
|
|
if (un.release[0] == '2') {
|
|
k_version = un.release[2] - '0';
|
|
}
|
|
|
|
strcpy ( filename, "/lib/modules/" );
|
|
strcat ( filename, un.release );
|
|
strcat ( filename, "/modules.dep" );
|
|
|
|
if (( fd = open ( filename, O_RDONLY )) < 0 ) {
|
|
|
|
/* Ok, that didn't work. Fall back to looking in /lib/modules */
|
|
if (( fd = open ( "/lib/modules/modules.dep", O_RDONLY )) < 0 ) {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
while ( reads ( fd, buffer, sizeof( buffer ))) {
|
|
int l = bb_strlen ( buffer );
|
|
char *p = 0;
|
|
|
|
while ( isspace ( buffer [l-1] )) {
|
|
buffer [l-1] = 0;
|
|
l--;
|
|
}
|
|
|
|
if ( l == 0 ) {
|
|
continuation_line = 0;
|
|
continue;
|
|
}
|
|
|
|
if ( !continuation_line ) {
|
|
char *col = strchr ( buffer, ':' );
|
|
|
|
if ( col ) {
|
|
char *mods;
|
|
char *mod;
|
|
int ext = 0;
|
|
|
|
*col = 0;
|
|
mods = strrchr ( buffer, '/' );
|
|
|
|
if ( !mods )
|
|
mods = buffer;
|
|
else
|
|
mods++;
|
|
|
|
#if defined(CONFIG_FEATURE_2_6_MODULES)
|
|
if ((k_version > 4) && ( *(col-3) == '.' ) &&
|
|
( *(col-2) == 'k' ) && ( *(col-1) == 'o' ))
|
|
ext = 3;
|
|
else
|
|
#endif
|
|
if (( *(col-2) == '.' ) && ( *(col-1) == 'o' ))
|
|
ext = 2;
|
|
|
|
mod = bb_xstrndup ( mods, col - mods - ext );
|
|
|
|
if ( !current ) {
|
|
first = current = (struct dep_t *) xmalloc ( sizeof ( struct dep_t ));
|
|
}
|
|
else {
|
|
current-> m_next = (struct dep_t *) xmalloc ( sizeof ( struct dep_t ));
|
|
current = current-> m_next;
|
|
}
|
|
current-> m_module = mod;
|
|
current-> m_options = 0;
|
|
current-> m_isalias = 0;
|
|
current-> m_depcnt = 0;
|
|
current-> m_deparr = 0;
|
|
current-> m_next = 0;
|
|
|
|
//printf ( "%s:\n", mod );
|
|
|
|
p = col + 1;
|
|
}
|
|
else
|
|
p = 0;
|
|
}
|
|
else
|
|
p = buffer;
|
|
|
|
if ( p && *p ) {
|
|
char *end = &buffer [l-1];
|
|
char *deps = strrchr ( end, '/' );
|
|
char *dep;
|
|
int ext = 0;
|
|
|
|
while ( isblank ( *end ) || ( *end == '\\' ))
|
|
end--;
|
|
|
|
deps = strrchr ( p, '/' );
|
|
|
|
if ( !deps || ( deps < p )) {
|
|
deps = p;
|
|
|
|
while ( isblank ( *deps ))
|
|
deps++;
|
|
}
|
|
else
|
|
deps++;
|
|
|
|
#if defined(CONFIG_FEATURE_2_6_MODULES)
|
|
if ((k_version > 4) && ( *(end-2) == '.' ) && *(end-1) == 'k' &&
|
|
( *end == 'o' ))
|
|
ext = 3;
|
|
else
|
|
#endif
|
|
if (( *(end-1) == '.' ) && ( *end == 'o' ))
|
|
ext = 2;
|
|
|
|
/* Cope with blank lines */
|
|
if ((end-deps-ext+1) <= 0)
|
|
continue;
|
|
|
|
dep = bb_xstrndup ( deps, end - deps - ext + 1 );
|
|
|
|
current-> m_depcnt++;
|
|
current-> m_deparr = (char **) xrealloc ( current-> m_deparr, sizeof ( char *) * current-> m_depcnt );
|
|
current-> m_deparr [current-> m_depcnt - 1] = dep;
|
|
|
|
//printf ( " %d) %s\n", current-> m_depcnt, current-> m_deparr [current-> m_depcnt -1] );
|
|
}
|
|
|
|
if ( buffer [l-1] == '\\' )
|
|
continuation_line = 1;
|
|
else
|
|
continuation_line = 0;
|
|
}
|
|
close ( fd );
|
|
|
|
// alias parsing is not 100% correct (no correct handling of continuation lines within an alias) !
|
|
|
|
if (( fd = open ( "/etc/modules.conf", O_RDONLY )) < 0 )
|
|
if (( fd = open ( "/etc/conf.modules", O_RDONLY )) < 0 )
|
|
return first;
|
|
|
|
continuation_line = 0;
|
|
while ( reads ( fd, buffer, sizeof( buffer ))) {
|
|
int l;
|
|
char *p;
|
|
|
|
p = strchr ( buffer, '#' );
|
|
if ( p )
|
|
*p = 0;
|
|
|
|
l = bb_strlen ( buffer );
|
|
|
|
while ( l && isspace ( buffer [l-1] )) {
|
|
buffer [l-1] = 0;
|
|
l--;
|
|
}
|
|
|
|
if ( l == 0 ) {
|
|
continuation_line = 0;
|
|
continue;
|
|
}
|
|
|
|
if ( !continuation_line ) {
|
|
if (( strncmp ( buffer, "alias", 5 ) == 0 ) && isspace ( buffer [5] )) {
|
|
char *alias, *mod;
|
|
|
|
if ( parse_tag_value ( buffer + 6, &alias, &mod )) {
|
|
// fprintf ( stderr, "ALIAS: '%s' -> '%s'\n", alias, mod );
|
|
|
|
if ( !current ) {
|
|
first = current = (struct dep_t *) xmalloc ( sizeof ( struct dep_t ));
|
|
}
|
|
else {
|
|
current-> m_next = (struct dep_t *) xmalloc ( sizeof ( struct dep_t ));
|
|
current = current-> m_next;
|
|
}
|
|
current-> m_module = bb_xstrdup ( alias );
|
|
current-> m_isalias = 1;
|
|
|
|
if (( strcmp ( alias, "off" ) == 0 ) || ( strcmp ( alias, "null" ) == 0 )) {
|
|
current-> m_depcnt = 0;
|
|
current-> m_deparr = 0;
|
|
}
|
|
else {
|
|
current-> m_depcnt = 1;
|
|
current-> m_deparr = xmalloc ( 1 * sizeof( char * ));
|
|
current-> m_deparr[0] = bb_xstrdup ( mod );
|
|
}
|
|
current-> m_next = 0;
|
|
}
|
|
}
|
|
else if (( strncmp ( buffer, "options", 7 ) == 0 ) && isspace ( buffer [7] )) {
|
|
char *mod, *opt;
|
|
|
|
if ( parse_tag_value ( buffer + 8, &mod, &opt )) {
|
|
struct dep_t *dt;
|
|
|
|
for ( dt = first; dt; dt = dt-> m_next ) {
|
|
if ( strcmp ( dt-> m_module, mod ) == 0 )
|
|
break;
|
|
}
|
|
if ( dt ) {
|
|
dt-> m_options = xrealloc ( dt-> m_options, bb_strlen( opt ) + 1 );
|
|
strcpy ( dt-> m_options, opt );
|
|
|
|
// fprintf ( stderr, "OPTION: '%s' -> '%s'\n", dt-> m_module, dt-> m_options );
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
close ( fd );
|
|
|
|
return first;
|
|
}
|
|
|
|
/* return 1 = loaded, 0 = not loaded, -1 = can't tell */
|
|
static int already_loaded (const char *name)
|
|
{
|
|
int fd;
|
|
char buffer[256];
|
|
|
|
fd = open ("/proc/modules", O_RDONLY);
|
|
if (fd < 0)
|
|
return -1;
|
|
|
|
while ( reads ( fd, buffer, sizeof( buffer ))) {
|
|
char *p;
|
|
|
|
p = strchr (buffer, ' ');
|
|
if (p) {
|
|
*p = 0;
|
|
if (strcmp (name, buffer) == 0) {
|
|
close (fd);
|
|
return 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
close (fd);
|
|
return 0;
|
|
}
|
|
|
|
static int mod_process ( struct mod_list_t *list, int do_insert )
|
|
{
|
|
char lcmd [256];
|
|
int rc = 1;
|
|
|
|
while ( list ) {
|
|
*lcmd = '\0';
|
|
if ( do_insert ) {
|
|
if (already_loaded (list->m_module) != 1)
|
|
snprintf ( lcmd, sizeof( lcmd ) - 1, "insmod %s %s %s %s %s", do_syslog ? "-s" : "", autoclean ? "-k" : "", quiet ? "-q" : "", list-> m_module, list-> m_options ? list-> m_options : "" );
|
|
} else {
|
|
if (already_loaded (list->m_module) != 0)
|
|
snprintf ( lcmd, sizeof( lcmd ) - 1, "rmmod %s %s", do_syslog ? "-s" : "", list-> m_module );
|
|
}
|
|
|
|
if ( verbose )
|
|
printf ( "%s\n", lcmd );
|
|
if ( !show_only && *lcmd) {
|
|
int rc2 = system ( lcmd );
|
|
if (do_insert) rc = rc2; /* only last module matters */
|
|
else if (!rc2) rc = 0; /* success if remove any mod */
|
|
}
|
|
|
|
list = do_insert ? list-> m_prev : list-> m_next;
|
|
}
|
|
return (show_only) ? 0 : rc;
|
|
}
|
|
|
|
static void check_dep ( char *mod, struct mod_list_t **head, struct mod_list_t **tail )
|
|
{
|
|
struct mod_list_t *find;
|
|
struct dep_t *dt;
|
|
char *opt = 0;
|
|
int lm;
|
|
|
|
// remove .o extension
|
|
lm = bb_strlen ( mod );
|
|
|
|
#if defined(CONFIG_FEATURE_2_6_MODULES)
|
|
if ((k_version > 4) && ( mod [lm-3] == '.' ) &&
|
|
( mod [lm-2] == 'k' ) && ( mod [lm-1] == 'o' ))
|
|
mod [lm-3] = 0;
|
|
else
|
|
#endif
|
|
if (( mod [lm-2] == '.' ) && ( mod [lm-1] == 'o' ))
|
|
mod [lm-2] = 0;
|
|
|
|
// check dependencies
|
|
for ( dt = depend; dt; dt = dt-> m_next ) {
|
|
if ( strcmp ( dt-> m_module, mod ) == 0 ) {
|
|
opt = dt-> m_options;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// resolve alias names
|
|
while ( dt && dt-> m_isalias ) {
|
|
if ( dt-> m_depcnt == 1 ) {
|
|
struct dep_t *adt;
|
|
|
|
for ( adt = depend; adt; adt = adt-> m_next ) {
|
|
if ( strcmp ( adt-> m_module, dt-> m_deparr [0] ) == 0 )
|
|
break;
|
|
}
|
|
if ( adt ) {
|
|
dt = adt;
|
|
mod = dt-> m_module;
|
|
if ( !opt )
|
|
opt = dt-> m_options;
|
|
}
|
|
else
|
|
return;
|
|
}
|
|
else
|
|
return;
|
|
}
|
|
|
|
// search for duplicates
|
|
for ( find = *head; find; find = find-> m_next ) {
|
|
if ( !strcmp ( mod, find-> m_module )) {
|
|
// found -> dequeue it
|
|
|
|
if ( find-> m_prev )
|
|
find-> m_prev-> m_next = find-> m_next;
|
|
else
|
|
*head = find-> m_next;
|
|
|
|
if ( find-> m_next )
|
|
find-> m_next-> m_prev = find-> m_prev;
|
|
else
|
|
*tail = find-> m_prev;
|
|
|
|
break; // there can be only one duplicate
|
|
}
|
|
}
|
|
|
|
if ( !find ) { // did not find a duplicate
|
|
find = (struct mod_list_t *) xmalloc ( sizeof(struct mod_list_t));
|
|
find-> m_module = mod;
|
|
find-> m_options = opt;
|
|
}
|
|
|
|
// enqueue at tail
|
|
if ( *tail )
|
|
(*tail)-> m_next = find;
|
|
find-> m_prev = *tail;
|
|
find-> m_next = 0;
|
|
|
|
if ( !*head )
|
|
*head = find;
|
|
*tail = find;
|
|
|
|
if ( dt ) {
|
|
int i;
|
|
|
|
for ( i = 0; i < dt-> m_depcnt; i++ )
|
|
check_dep ( dt-> m_deparr [i], head, tail );
|
|
}
|
|
}
|
|
|
|
|
|
|
|
static int mod_insert ( char *mod, int argc, char **argv )
|
|
{
|
|
struct mod_list_t *tail = 0;
|
|
struct mod_list_t *head = 0;
|
|
int rc;
|
|
|
|
// get dep list for module mod
|
|
check_dep ( mod, &head, &tail );
|
|
|
|
if ( head && tail ) {
|
|
if ( argc ) {
|
|
int i;
|
|
int l = 0;
|
|
|
|
// append module args
|
|
for ( i = 0; i < argc; i++ )
|
|
l += ( bb_strlen ( argv [i] ) + 1 );
|
|
|
|
head-> m_options = xrealloc ( head-> m_options, l + 1 );
|
|
head-> m_options [0] = 0;
|
|
|
|
for ( i = 0; i < argc; i++ ) {
|
|
strcat ( head-> m_options, argv [i] );
|
|
strcat ( head-> m_options, " " );
|
|
}
|
|
}
|
|
|
|
// process tail ---> head
|
|
rc = mod_process ( tail, 1 );
|
|
}
|
|
else
|
|
rc = 1;
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int mod_remove ( char *mod )
|
|
{
|
|
int rc;
|
|
static struct mod_list_t rm_a_dummy = { "-a", 0, 0 };
|
|
|
|
struct mod_list_t *head = 0;
|
|
struct mod_list_t *tail = 0;
|
|
|
|
if ( mod )
|
|
check_dep ( mod, &head, &tail );
|
|
else // autoclean
|
|
head = tail = &rm_a_dummy;
|
|
|
|
if ( head && tail )
|
|
rc = mod_process ( head, 0 ); // process head ---> tail
|
|
else
|
|
rc = 1;
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
extern int modprobe_main(int argc, char** argv)
|
|
{
|
|
int opt;
|
|
int remove_opt = 0;
|
|
|
|
autoclean = show_only = quiet = do_syslog = verbose = 0;
|
|
|
|
while ((opt = getopt(argc, argv, "acdklnqrst:vVC:")) != -1) {
|
|
switch(opt) {
|
|
case 'c': // no config used
|
|
case 'l': // no pattern matching
|
|
return EXIT_SUCCESS;
|
|
break;
|
|
case 'C': // no config used
|
|
case 't': // no pattern matching
|
|
bb_error_msg_and_die("-t and -C not supported");
|
|
|
|
case 'a': // ignore
|
|
case 'd': // ignore
|
|
break;
|
|
case 'k':
|
|
autoclean++;
|
|
break;
|
|
case 'n':
|
|
show_only++;
|
|
break;
|
|
case 'q':
|
|
quiet++;
|
|
break;
|
|
case 'r':
|
|
remove_opt++;
|
|
break;
|
|
case 's':
|
|
do_syslog++;
|
|
break;
|
|
case 'v':
|
|
verbose++;
|
|
break;
|
|
case 'V':
|
|
default:
|
|
bb_show_usage();
|
|
break;
|
|
}
|
|
}
|
|
|
|
depend = build_dep ( );
|
|
|
|
if ( !depend )
|
|
bb_error_msg_and_die ( "could not parse modules.dep\n" );
|
|
|
|
if (remove_opt) {
|
|
int rc = EXIT_SUCCESS;
|
|
do {
|
|
if (mod_remove ( optind < argc ?
|
|
bb_xstrdup (argv [optind]) : NULL )) {
|
|
bb_error_msg ("failed to remove module %s",
|
|
argv [optind] );
|
|
rc = EXIT_FAILURE;
|
|
}
|
|
} while ( ++optind < argc );
|
|
|
|
return rc;
|
|
}
|
|
|
|
if (optind >= argc)
|
|
bb_error_msg_and_die ( "No module or pattern provided\n" );
|
|
|
|
if ( mod_insert ( bb_xstrdup ( argv [optind] ), argc - optind - 1, argv + optind + 1 ))
|
|
bb_error_msg_and_die ( "failed to load module %s", argv [optind] );
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|
|
|