mirror of
https://github.com/sheumann/hush.git
synced 2024-12-27 01:32:08 +00:00
Complete rewrite to support stack loading/unloading with proper
handling of duplicates in the dependencies list.
This commit is contained in:
Robert Griebl
parent
d77601178d
commit
52e8d060a9
@ -3,11 +3,12 @@
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* really dumb modprobe implementation for busybox
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* Copyright (C) 2001 Lineo, davidm@lineo.com
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*
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* CONFIG_MODPROBE_DEPEND stuff was added and is
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* Copyright (C) 2002 Robert Griebl, griebl@gmx.de
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* dependency specific stuff completly rewritten and
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* copyright (c) 2002 by Robert Griebl, griebl@gmx.de
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*
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*/
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#include <sys/utsname.h>
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#include <stdio.h>
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#include <getopt.h>
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#include <stdlib.h>
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@ -17,22 +18,27 @@
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#include <ctype.h>
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#include "busybox.h"
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static char cmd[128];
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#define CONFIG_MODPROBE_DEPEND
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#ifdef CONFIG_MODPROBE_DEPEND
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#include <sys/utsname.h>
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struct dep_t {
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char * m_module;
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int m_depcnt;
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char ** m_deparr;
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struct dep_t * m_next;
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};
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struct mod_list_t {
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char * m_module;
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struct mod_list_t * m_prev;
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struct mod_list_t * m_next;
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};
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static struct dep_t *depend = 0;
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static struct dep_t *build_dep ( void )
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{
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@ -99,7 +105,7 @@ static struct dep_t *build_dep ( void )
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current-> m_module = mod;
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current-> m_depcnt = 0;
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current-> m_deparr = 0;
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current-> m_next = 0;
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current-> m_next = 0;
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//printf ( "%s:\n", mod );
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@ -154,70 +160,142 @@ static struct dep_t *build_dep ( void )
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}
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static struct dep_t *find_dep ( struct dep_t *dt, char *mod )
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static int mod_process ( struct mod_list_t *list, int do_insert, int autoclean, int quiet, int do_syslog, int show_only, int verbose )
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{
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int lm = xstrlen ( mod );
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int extpos = 0;
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char lcmd [256];
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int rc = 0;
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if (( mod [lm-2] == '.' ) && ( mod [lm-1] == 'o' ))
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extpos = 2;
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if ( !list )
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return 1;
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if ( extpos > 0 )
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mod [lm - extpos] = 0;
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while ( dt ) {
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if ( !strcmp ( dt-> m_module, mod ))
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break;
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dt = dt-> m_next;
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while ( list ) {
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if ( do_insert )
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snprintf ( lcmd, sizeof( lcmd ) - 1, "insmod %s %s %s %s 2>/dev/null", do_syslog ? "-s" : "", autoclean ? "-k" : "", quiet ? "-q" : "", list-> m_module );
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else
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snprintf ( lcmd, sizeof( lcmd ) - 1, "rmmod %s %s 2>/dev/null", do_syslog ? "-s" : "", list-> m_module );
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if ( verbose )
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printf ( "%s\n", lcmd );
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if ( !show_only )
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rc |= system ( lcmd );
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list = do_insert ? list-> m_prev : list-> m_next;
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}
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if ( extpos > 0 )
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mod [lm - extpos] = '.';
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return dt;
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return rc;
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}
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#define MODPROBE_EXECUTE 0x1
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#define MODPROBE_INSERT 0x2
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#define MODPROBE_REMOVE 0x4
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static void check_dep ( char *mod, int do_syslog,
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int show_only, int verbose, int flags )
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static void check_dep ( char *mod, struct mod_list_t **head, struct mod_list_t **tail )
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{
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static struct dep_t *depend = (struct dep_t *) -1;
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struct mod_list_t *find;
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struct dep_t *dt;
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if ( depend == (struct dep_t *) -1 )
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depend = build_dep ( );
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if (( dt = find_dep ( depend, mod ))) {
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int i;
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for ( i = 0; i < dt-> m_depcnt; i++ )
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check_dep ( dt-> m_deparr [i], do_syslog,
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show_only, verbose, flags|MODPROBE_EXECUTE);
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}
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if ( flags & MODPROBE_EXECUTE ) {
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char lcmd [256];
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if ( flags & MODPROBE_INSERT ) {
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snprintf(lcmd, sizeof(lcmd)-1, "insmod %s -q -k %s 2>/dev/null",
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do_syslog ? "-s" : "", mod );
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}
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if ( flags & MODPROBE_REMOVE ) {
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snprintf(lcmd, sizeof(lcmd)-1, "insmod %s -q -k %s 2>/dev/null",
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do_syslog ? "-s" : "", mod );
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}
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if ( flags & (MODPROBE_REMOVE|MODPROBE_INSERT) ) {
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if (verbose)
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printf("%s\n", lcmd);
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if (!show_only)
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system ( lcmd );
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}
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}
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}
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#endif
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int lm;
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// remove .o extension
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lm = xstrlen ( mod );
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if (( mod [lm-2] == '.' ) && ( mod [lm-1] == 'o' ))
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mod [lm-2] = 0;
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//printf ( "check_dep: %s\n", mod );
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// search for duplicates
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for ( find = *head; find; find = find-> m_next ) {
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if ( !strcmp ( mod, find-> m_module )) {
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// found -> dequeue it
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if ( find-> m_prev )
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find-> m_prev-> m_next = find-> m_next;
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else
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*head = find-> m_next;
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if ( find-> m_next )
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find-> m_next-> m_prev = find-> m_prev;
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else
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*tail = find-> m_prev;
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//printf ( "DUP\n" );
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break; // there can be only one duplicate
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}
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}
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if ( !find ) { // did not find a duplicate
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find = (struct mod_list_t *) xmalloc ( sizeof(struct mod_list_t));
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find-> m_module = mod;
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}
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// enqueue at tail
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if ( *tail )
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(*tail)-> m_next = find;
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find-> m_prev = *tail;
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find-> m_next = 0;
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if ( !*head )
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*head = find;
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*tail = find;
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// check dependencies
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for ( dt = depend; dt; dt = dt-> m_next ) {
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if ( !strcmp ( dt-> m_module, mod )) {
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int i;
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for ( i = 0; i < dt-> m_depcnt; i++ )
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check_dep ( dt-> m_deparr [i], head, tail );
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}
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}
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}
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static int mod_insert ( char *mod, int argc, char **argv, int autoclean, int quiet, int do_syslog, int show_only, int verbose )
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{
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struct mod_list_t *tail = 0;
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struct mod_list_t *head = 0;
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int rc = 0;
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// get dep list for module mod
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check_dep ( mod, &head, &tail );
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if ( head && tail ) {
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int i;
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// append module args
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head-> m_module = xmalloc ( 256 );
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strcpy ( head-> m_module, mod );
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for ( i = 0; i < argc; i++ ) {
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strcat ( head-> m_module, " " );
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strcat ( head-> m_module, argv [i] );
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}
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// process tail ---> head
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rc |= mod_process ( tail, 1, autoclean, quiet, do_syslog, show_only, verbose );
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}
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else
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rc = 1;
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return rc;
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}
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static void mod_remove ( char *mod, int do_syslog, int show_only, int verbose )
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{
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static struct mod_list_t rm_a_dummy = { "-a", 0, 0 };
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struct mod_list_t *head = 0;
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struct mod_list_t *tail = 0;
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if ( mod )
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check_dep ( mod, &head, &tail );
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else // autoclean
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head = tail = &rm_a_dummy;
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if ( head && tail ) {
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// process head ---> tail
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mod_process ( head, 0, 0, 0, do_syslog, show_only, verbose );
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}
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}
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extern int modprobe_main(int argc, char** argv)
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{
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@ -281,24 +359,18 @@ extern int modprobe_main(int argc, char** argv)
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if (list)
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exit(EXIT_SUCCESS);
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depend = build_dep ( );
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if ( !depend ) {
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fprintf (stderr, "could not parse modules.dep\n" );
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exit (EXIT_FAILURE);
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}
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if (remove_opt) {
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do {
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sprintf(cmd, "rmmod %s %s %s",
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optind >= argc ? "-a" : "",
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do_syslog ? "-s" : "",
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optind < argc ? argv[optind] : "");
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if (do_syslog)
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syslog(LOG_INFO, "%s", cmd);
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if (verbose)
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printf("%s\n", cmd);
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if (!show_only)
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rc = system(cmd);
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#ifdef CONFIG_MODPROBE_DEPEND
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if ( optind < argc )
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check_dep ( argv [optind], do_syslog, show_only, verbose, MODPROBE_REMOVE);
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#endif
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} while (++optind < argc);
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mod_remove ( optind < argc ? argv [optind] : 0, do_syslog, show_only, verbose );
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} while ( ++optind < argc );
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exit(EXIT_SUCCESS);
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}
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@ -306,29 +378,8 @@ extern int modprobe_main(int argc, char** argv)
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fprintf(stderr, "No module or pattern provided\n");
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exit(EXIT_FAILURE);
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}
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sprintf(cmd, "insmod %s %s %s",
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do_syslog ? "-s" : "",
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quiet ? "-q" : "",
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autoclean ? "-k" : "");
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#ifdef CONFIG_MODPROBE_DEPEND
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check_dep ( argv [optind], do_syslog, show_only, verbose, MODPROBE_INSERT);
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#endif
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while (optind < argc) {
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strcat(cmd, " ");
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strcat(cmd, argv[optind]);
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optind++;
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}
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if (do_syslog)
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syslog(LOG_INFO, "%s", cmd);
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if (verbose)
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printf("%s\n", cmd);
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if (!show_only)
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rc = system(cmd);
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else
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rc = 0;
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rc = mod_insert ( argv [optind], argc - optind - 1, argv + optind + 1, autoclean, quiet, do_syslog, show_only, verbose );
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exit(rc ? EXIT_FAILURE : EXIT_SUCCESS);
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}
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