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Reworked by Robert Griebl <griebl@gmx.de> to support proper

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module dependancies.
This commit is contained in:
Eric Andersen 2002-04-26 06:04:01 +00:00
parent 54c14d7850
commit 60e56f5292
1 changed files with 188 additions and 0 deletions
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188
modutils/modprobe.c
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@ -2,6 +2,10 @@
/*
* really dumb modprobe implementation for busybox
* Copyright (C) 2001 Lineo, davidm@lineo.com
*
* CONFIG_MODPROBE_DEPEND stuff was added and is
* Copyright (C) 2002 Robert Griebl, griebl@gmx.de
*
*/
#include <stdio.h>
@ -10,10 +14,189 @@
#include <unistd.h>
#include <syslog.h>
#include <string.h>
#include <ctype.h>
#include "busybox.h"
static char cmd[128];
#define CONFIG_MODPROBE_DEPEND
#ifdef CONFIG_MODPROBE_DEPEND
#include <sys/utsname.h>
struct dep_t {
char * m_module;
int m_depcnt;
char ** m_deparr;
struct dep_t * m_next;
};
static struct dep_t *build_dep ( )
{
struct utsname un;
FILE *f;
struct dep_t *first = 0;
struct dep_t *current = 0;
char buffer [4096];
char *filename = buffer;
int continuation_line = 0;
if ( uname ( &un ))
return 0;
strcpy ( filename, "/lib/modules/" );
strcat ( filename, un. release );
strcat ( filename, "/modules.dep" );
f = fopen ( filename, "r" );
if ( !f )
return 0;
while ( fgets ( buffer, sizeof( buffer), f )) {
int l = strlen ( buffer );
char *p = 0;
if ( buffer [l-1] == '\n' ) {
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;
*col = 0;
mods = strrchr ( buffer, '/' );
if ( !mods )
mods = buffer;
else
mods++;
mod = (char *) malloc ( col - mods + 1 );
strncpy ( mod, mods, col - mods );
mod [col - mods] = 0;
if ( !current ) {
first = current = (struct dep_t *) malloc ( sizeof ( struct dep_t ));
}
else {
current-> m_next = (struct dep_t *) malloc ( sizeof ( struct dep_t ));
current = current-> m_next;
}
current-> m_module = mod;
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;
while ( isblank ( *end ) || ( *end == '\\' ))
end--;
deps = strrchr ( p, '/' );
if ( !deps || ( deps < p )) {
deps = p;
while ( isblank ( *deps ))
deps++;
}
else
deps++;
dep = (char *) malloc ( end - deps + 2 );
strncpy ( dep, deps, end - deps + 1 );
dep [end - deps + 1] = 0;
current-> m_depcnt++;
current-> m_deparr = (char **) realloc ( 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;
}
fclose ( f );
return first;
}
static struct dep_t *find_dep ( struct dep_t *dt, char *mod )
{
int lm = strlen ( mod );
int hasext = 0;
if (( mod [lm-2] == '.' ) && ( mod [lm-1] == 'o' ))
hasext = 1;
while ( dt ) {
if ( hasext && !strcmp ( dt-> m_module, mod ))
break;
else if ( !hasext && !strncmp ( dt-> m_module, mod, strlen ( dt-> m_module ) - 2 ))
break;
dt = dt-> m_next;
}
return dt;
}
static void check_dep ( char *mod, int loadit )
{
static struct dep_t *depend = (struct dep_t *) -1;
struct dep_t *dt;
if ( depend == (struct dep_t *) -1 )
depend = build_dep ( );
/* printf ( "CHECK: %s (%p)\n", mod, depend ); */
if (( dt = find_dep ( depend, mod ))) {
int i;
for ( i = 0; i < dt-> m_depcnt; i++ )
check_dep ( dt-> m_deparr [i], 1 );
}
if ( loadit ) {
char lcmd [128];
sprintf ( lcmd, "insmod -k %s 2>/dev/null", mod );
system ( lcmd );
}
}
#endif
extern int modprobe_main(int argc, char** argv)
{
int ch, rc = 0;
@ -101,6 +284,11 @@ extern int modprobe_main(int argc, char** argv)
do_syslog ? "-s" : "",
quiet ? "-q" : "",
autoclean ? "-k" : "");
#ifdef CONFIG_MODPROBE_DEPEND
check_dep ( argv [optind], 0 );
#endif
while (optind < argc) {
strcat(cmd, " ");
strcat(cmd, argv[optind]);