modprobe now also uses "options" from /etc/modules.conf

1 files changed, 99 insertions, 55 deletions

diff --git a/modutils/modprobe.c b/modutils/modprobe.c
index b05158ac0..36d2aa211 100644
--- a/modutils/modprobe.c
+++ b/modutils/modprobe.c
@@ -1,9 +1,6 @@
 /* vi: set sw=4 ts=4: */
 /*
- * really dumb modprobe implementation for busybox
- * Copyright (C) 2001 Lineo, davidm@lineo.com
- *
- * dependency specific stuff completly rewritten and
+ * Modprobe written from scratch for BusyBox
  * copyright (c) 2002 by Robert Griebl, griebl@gmx.de
  *
  */
@@ -22,6 +19,7 @@
 
 struct dep_t {
         char *  m_module;
+        char *  m_options;
         
         int     m_isalias  : 1;
         int     m_reserved : 15;
@@ -34,6 +32,7 @@ struct dep_t {
 
 struct mod_list_t {
         char *  m_module;
+        char *  m_options;
         
         struct mod_list_t * m_prev;
         struct mod_list_t * m_next;
@@ -43,6 +42,24 @@ struct mod_list_t {
 static struct dep_t *depend;
 static int autoclean, show_only, quiet, do_syslog, verbose;
 
+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 xstrlen( tag ) && xstrlen( 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
@@ -141,6 +158,7 @@ static struct dep_t *build_dep ( void )
                                         current = current-> m_next;
                                 }
                                 current-> m_module  = mod;
+                                current-> m_options = 0;
                                 current-> m_isalias = 0;
                                 current-> m_depcnt  = 0;
                                 current-> m_deparr  = 0;
@@ -230,41 +248,49 @@ static struct dep_t *build_dep ( void )
                         if (( strncmp ( buffer, "alias", 5 ) == 0 ) && isspace ( buffer [5] )) {
                                 char *alias, *mod;
 
-                                alias = buffer + 6;
-                                
-                                while ( isspace ( *alias ))
-                                        alias++;                        
-                                mod = alias;                                    
-                                while ( !isspace ( *mod ))
-                                        mod++;
-                                *mod = 0;
-                                mod++;
-                                while ( isspace ( *mod ))
-                                        mod++;
-                                                                                
-//                                      fprintf ( stderr, "ALIAS: '%s' -> '%s'\n", 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;
+                                        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  = 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] = xstrdup ( mod );
+                                        }
+                                        current-> m_next    = 0;                                        
                                 }
-                                current-> m_module  = xstrdup ( alias );
-                                current-> m_isalias = 1;
+                        }                               
+                        else if (( strncmp ( buffer, "options", 7 ) == 0 ) && isspace ( buffer [7] )) { 
+                                char *mod, *opt;
                                 
-                                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] = xstrdup ( mod );
+                                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, xstrlen( opt ) + 1 );
+                                                strcpy ( dt-> m_options, opt );
+                                                
+                                                // fprintf ( stderr, "OPTION: '%s' -> '%s'\n", dt-> m_module, dt-> m_options );
+                                        }
                                 }
-                                current-> m_next    = 0;                                        
-                        }                               
+                        }
                 }
         }
         close ( fd );
@@ -283,7 +309,7 @@ static int mod_process ( struct mod_list_t *list, int do_insert )
 
         while ( list ) {
                 if ( do_insert )
-                        snprintf ( lcmd, sizeof( lcmd ) - 1, "insmod %s %s %s %s 2>/dev/null", do_syslog ? "-s" : "", autoclean ? "-k" : "", quiet ? "-q" : "", list-> m_module );
+                        snprintf ( lcmd, sizeof( lcmd ) - 1, "insmod %s %s %s %s %s 2>/dev/null", do_syslog ? "-s" : "", autoclean ? "-k" : "", quiet ? "-q" : "", list-> m_module, list-> m_options ? list-> m_options : "" );
                 else
                         snprintf ( lcmd, sizeof( lcmd ) - 1, "rmmod %s %s 2>/dev/null", do_syslog ? "-s" : "", list-> m_module );
                 
@@ -301,7 +327,7 @@ static void check_dep ( char *mod, struct mod_list_t **head, struct mod_list_t *
 {
         struct mod_list_t *find;
         struct dep_t *dt;
-
+        char *opt = 0;
         int lm;
 
         // remove .o extension
@@ -311,16 +337,31 @@ static void check_dep ( char *mod, struct mod_list_t **head, struct mod_list_t *
 
         // check dependencies
         for ( dt = depend; dt; dt = dt-> m_next ) {
-                if ( strcmp ( dt-> m_module, mod ) == 0 ) 
+                if ( strcmp ( dt-> m_module, mod ) == 0 ) {
+                        opt = dt-> m_options;
                         break;
+                }
         }
+        
         // resolve alias names
-        if ( dt && dt-> m_isalias ) {
-                if ( dt-> m_depcnt == 1 )
-                        check_dep ( dt-> m_deparr [0], head, tail );
-                printf ( "Got alias: %s -> %s\n", mod, dt-> m_deparr [0] );
-                        
-                return;
+        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 ) {
+                                        if ( !opt )
+                                                opt = adt-> m_options;
+                                        break;
+                                }
+                        }
+                        if ( !adt )
+                                return;
+                        else
+                                dt = adt;
+                }
+                else
+                        return;                 
         }
         
         // search for duplicates
@@ -345,6 +386,7 @@ static void check_dep ( char *mod, struct mod_list_t **head, struct mod_list_t *
         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      
@@ -377,21 +419,23 @@ static int mod_insert ( char *mod, int argc, char **argv )
         check_dep ( mod, &head, &tail );
         
         if ( head && tail ) {
-                int i;
-                int l = 0;
+                if ( argc ) {
+                        int i;          
+                        int l = 0;
         
-                // append module args
-                l = xstrlen ( head-> m_module );
-                for ( i = 0; i < argc; i++ ) 
-                        l += ( xstrlen ( argv [i] ) + 1 );
+                        // append module args
+                        for ( i = 0; i < argc; i++ ) 
+                                l += ( xstrlen ( argv [i] ) + 1 );
                 
-                head-> m_module = xrealloc ( head-> m_module, l + 1 );
+                        head-> m_options = xrealloc ( head-> m_options, l + 1 );
+                        head-> m_options [0] = 0;
                 
-                for ( i = 0; i < argc; i++ ) {
-                        strcat ( head-> m_module, " " );
-                        strcat ( head-> m_module, argv [i] );
+                        for ( i = 0; i < argc; i++ ) {
+                                strcat ( head-> m_options, argv [i] );
+                                strcat ( head-> m_options, " " );
+                        }
                 }
-
+                
                 // process tail ---> head
                 rc |= mod_process ( tail, 1 );
         }