Modprobe update from Ignacio García Pérez, updating support for modprobe.conf.

git-svn-id: svn://busybox.net/trunk/busybox@14783 69ca8d6d-28ef-0310-b511-8ec308f3f277

1 files changed, 109 insertions, 73 deletions

diff --git a/modutils/modprobe.c b/modutils/modprobe.c
index 8defd2854..32a37ce17 100644
--- a/modutils/modprobe.c
+++ b/modutils/modprobe.c
@@ -266,6 +266,104 @@ static char *parse_command_string( char *src, char **dst )
 #endif /* ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS */
 
 /*
+ * This function reads aliases and default module options from a configuration file
+ * (/etc/modprobe.conf syntax). It supports includes (only files, no directories).
+ */
+static void include_conf ( struct dep_t **first, struct dep_t **current, char *buffer, int buflen, int fd )
+{
+        int continuation_line = 0;
+
+        // alias parsing is not 100% correct (no correct handling of continuation lines within an alias) !
+
+        while ( reads ( fd, buffer, buflen)) {
+                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 )) {
+                                        /* handle alias as a module dependent on the aliased module */
+                                        if ( !*current ) {
+                                                (*first) = (*current) = (struct dep_t *) xcalloc ( 1, sizeof ( struct dep_t ));
+                                        }
+                                        else {
+                                                (*current)-> m_next = (struct dep_t *) xcalloc ( 1, sizeof ( struct dep_t ));
+                                                (*current) = (*current)-> m_next;
+                                        }
+                                        (*current)-> m_name  = bb_xstrdup ( alias );
+                                        (*current)-> m_isalias = 1;
+
+                                        if (( strcmp ( mod, "off" ) == 0 ) || ( strcmp ( mod, "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;
+
+                                /* split the line in the module/alias name, and options */
+                                if ( parse_tag_value ( buffer + 8, &mod, &opt )) {
+                                        struct dep_t *dt;
+
+                                        /* find the corresponding module */
+                                        for ( dt = *first; dt; dt = dt-> m_next ) {
+                                                if ( strcmp ( dt-> m_name, mod ) == 0 )
+                                                        break;
+                                        }
+                                        if ( dt ) {
+                                                if ( ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS ) {
+                                                        char* new_opt = NULL;
+                                                        while( ( opt = parse_command_string( opt, &new_opt ) ) ) {
+                                                                dt-> m_options = append_option( dt-> m_options, new_opt );
+                                                        }
+                                                } else {
+                                                        dt-> m_options = append_option( dt-> m_options, opt );
+                                                }
+                                        }
+                                }
+                        }
+                        else if (( strncmp ( buffer, "include", 7 ) == 0 ) && isspace ( buffer [7] )) {
+
+                                int fdi; char *filename = buffer + 8;
+
+                                while ( isspace ( *filename ))
+                                        filename++;
+
+                                if (( fdi = open ( filename, O_RDONLY )) >= 0 ) {
+                                        include_conf(first, current, buffer, buflen, fdi);
+                                        close(fdi);
+                                }
+                        }
+                }
+        }
+}
+
+/*
  * This function builds a list of dependency rules from /lib/modules/`uname -r\modules.dep.
  * It then fills every modules and aliases with their  default options, found by parsing
  * modprobe.conf (or modules.conf, or conf.modules).
@@ -446,90 +544,28 @@ static struct dep_t *build_dep ( void )
         }
         close ( fd );
 
-        // alias parsing is not 100% correct (no correct handling of continuation lines within an alias) !
-
         if (!ENABLE_FEATURE_2_6_MODULES
                         || ( fd = open ( "/etc/modprobe.conf", O_RDONLY )) < 0 )
                 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 )) {
-                                        /* handle alias as a module dependent on the aliased module */
-                                        if ( !current ) {
-                                                first = current = (struct dep_t *) xcalloc ( 1, sizeof ( struct dep_t ));
-                                        }
-                                        else {
-                                                current-> m_next = (struct dep_t *) xcalloc ( 1, sizeof ( struct dep_t ));
-                                                current = current-> m_next;
-                                        }
-                                        current-> m_name  = bb_xstrdup ( alias );
-                                        current-> m_isalias = 1;
+        include_conf (&first, &current, buffer, sizeof(buffer), fd);
+        close(fd);
 
-                                        if (( strcmp ( mod, "off" ) == 0 ) || ( strcmp ( mod, "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;
+        filename = bb_xasprintf("/lib/modules/%s/modules.alias", un.release );
 
-                                /* split the line in the module/alias name, and options */
-                                if ( parse_tag_value ( buffer + 8, &mod, &opt )) {
-                                        struct dep_t *dt;
+        if (( fd = open ( filename, O_RDONLY )) < 0 ) {
 
-                                        /* find the corresponding module */
-                                        for ( dt = first; dt; dt = dt-> m_next ) {
-                                                if ( strcmp ( dt-> m_name, mod ) == 0 )
-                                                        break;
-                                        }
-                                        if ( dt ) {
-                                                if ( ENABLE_FEATURE_MODPROBE_MULTIPLE_OPTIONS ) {
-                                                        char* new_opt = NULL;
-                                                        while( ( opt = parse_command_string( opt, &new_opt ) ) ) {
-                                                                dt-> m_options = append_option( dt-> m_options, new_opt );
-                                                        }
-                                                } else {
-                                                        dt-> m_options = append_option( dt-> m_options, opt );
-                                                }
-                                        }
-                                }
-                        }
+                /* Ok, that didn't work.  Fall back to looking in /lib/modules */
+                if (( fd = open ( "/lib/modules/modules.alias", O_RDONLY )) < 0 ) {
+                        return first;
                 }
         }
-        close ( fd );
+        free(filename);
+
+        include_conf (&first, &current, buffer, sizeof(buffer), fd);
+        close(fd);
 
         return first;
 }