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authorGravatar Rob Landley <rob@landley.net>2005-12-12 19:38:44 +0000
committerGravatar Rob Landley <rob@landley.net>2005-12-12 19:38:44 +0000
commite9190962719e6a41a1423208125bc2a173dac1ae (patch)
treef7c7026bb2ca761c12e5c1e00da020782434eead /modutils
parent126da9ec2deade2fbcd8e57e595a69b91acf7265 (diff)
downloadbusybox-e9190962719e6a41a1423208125bc2a173dac1ae.tar.gz
busybox-e9190962719e6a41a1423208125bc2a173dac1ae.tar.bz2
Patch from Yann E. Morin, something to do with bugs 276 and 272.
Diffstat (limited to 'modutils')
-rw-r--r--modutils/modprobe.c505
1 files changed, 273 insertions, 232 deletions
diff --git a/modutils/modprobe.c b/modutils/modprobe.c
index 74fadc326..96b442cab 100644
--- a/modutils/modprobe.c
+++ b/modutils/modprobe.c
@@ -5,6 +5,8 @@
* Copyright (c) 2002 by Robert Griebl, griebl@gmx.de
* Copyright (c) 2003 by Andrew Dennison, andrew.dennison@motec.com.au
* Copyright (c) 2005 by Jim Bauer, jfbauer@nfr.com
+ *
+ * Portions Copyright (c) 2005 by Yann E. MORIN, yann.morin.1998@anciens.enib.fr
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
@@ -21,26 +23,31 @@
#include <fcntl.h>
#include "busybox.h"
+struct mod_opt_t { /* one-way list of options to pass to a module */
+ char * m_opt_val;
+ struct mod_opt_t * m_next;
+};
+struct dep_t { /* one-way list of dependency rules */
+ /* a dependency rule */
+ char * m_name; /* the module name*/
+ char * m_path; /* the module file path */
+ struct mod_opt_t * m_options; /* the module options */
+
+ int m_isalias : 1; /* the module is an alias */
+ int m_reserved : 15; /* stuffin' */
-struct dep_t {
- char * m_name;
- char * m_path;
- char * m_options;
-
- int m_isalias : 1;
- int m_reserved : 15;
-
- int m_depcnt : 16;
- char ** m_deparr;
+ int m_depcnt : 16; /* the number of dependable module(s) */
+ char ** m_deparr; /* the list of dependable module(s) */
- struct dep_t * m_next;
+ struct dep_t * m_next; /* the next dependency rule */
};
-struct mod_list_t {
+struct mod_list_t { /* two-way list of modules to process */
+ /* a module description */
char * m_name;
char * m_path;
- char * m_options;
+ struct mod_opt_t * m_options;
struct mod_list_t * m_prev;
struct mod_list_t * m_next;
@@ -49,7 +56,6 @@ struct mod_list_t {
static struct dep_t *depend;
static int autoclean, show_only, quiet, do_syslog, verbose;
-static int k_version;
static int parse_tag_value ( char *buffer, char **ptag, char **pvalue )
{
@@ -101,6 +107,144 @@ static char *reads ( int fd, char *buffer, size_t len )
return 0;
}
+/*
+ * This function appends an option to a list
+ */
+struct mod_opt_t *append_option( struct mod_opt_t *opt_list, char *opt )
+{
+ struct mod_opt_t *ol = opt_list;
+
+ if( ol ) {
+ while( ol-> m_next ) {
+ ol = ol-> m_next;
+ }
+ ol-> m_next = xmalloc( sizeof( struct mod_opt_t ) );
+ ol = ol-> m_next;
+ } else {
+ ol = opt_list = xmalloc( sizeof( struct mod_opt_t ) );
+ }
+
+ ol-> m_opt_val = bb_xstrdup( opt );
+ ol-> m_next = NULL;
+
+ return opt_list;
+}
+
+#if (defined CONFIG_FEATURE_MODPROBE_MULTIPLE_OPTIONS)
+/* static char* parse_command_string( char* src, char **dst );
+ * src: pointer to string containing argument
+ * dst: pointer to where to store the parsed argument
+ * return value: the pointer to the first char after the parsed argument,
+ * NULL if there was no argument parsed (only trailing spaces).
+ * Note that memory is allocated with bb_xstrdup when a new argument was
+ * parsed. Don't forget to free it!
+ */
+#define ARG_EMPTY 0x00
+#define ARG_IN_DQUOTES 0x01
+#define ARG_IN_SQUOTES 0x02
+static char *parse_command_string( char *src, char **dst )
+{
+ int opt_status = ARG_EMPTY;
+ char* tmp_str;
+
+ /* Dumb you, I have nothing to do... */
+ if( src == NULL ) return src;
+
+ /* Skip leading spaces */
+ while( *src == ' ' ) {
+ src++;
+ }
+ /* Is the end of string reached? */
+ if( *src == '\0' ) {
+ return NULL;
+ }
+ /* Reached the start of an argument
+ * By the way, we duplicate a little too much
+ * here but what is too much is freed later. */
+ *dst = tmp_str = bb_xstrdup( src );
+ /* Get to the end of that argument */
+ while( ( *tmp_str != '\0' )
+ && ( ( *tmp_str != ' ' )
+ || ( opt_status & ( ARG_IN_DQUOTES | ARG_IN_SQUOTES ) ) ) ) {
+ switch( *tmp_str ) {
+ case '\'':
+ if( opt_status & ARG_IN_DQUOTES ) {
+ /* Already in double quotes, keep current char as is */
+ } else {
+ /* shift left 1 char, until end of string: get rid of the opening/closing quotes */
+ memmove( tmp_str, tmp_str + 1, strlen( tmp_str ) );
+ /* mark me: we enter or leave single quotes */
+ opt_status ^= ARG_IN_SQUOTES;
+ /* Back one char, as we need to re-scan the new char there. */
+ tmp_str--;
+ }
+ break;
+ case '"':
+ if( opt_status & ARG_IN_SQUOTES ) {
+ /* Already in single quotes, keep current char as is */
+ } else {
+ /* shift left 1 char, until end of string: get rid of the opening/closing quotes */
+ memmove( tmp_str, tmp_str + 1, strlen( tmp_str ) );
+ /* mark me: we enter or leave double quotes */
+ opt_status ^= ARG_IN_DQUOTES;
+ /* Back one char, as we need to re-scan the new char there. */
+ tmp_str--;
+ }
+ break;
+ case '\\':
+ if( opt_status & ARG_IN_SQUOTES ) {
+ /* Between single quotes: keep as is. */
+ } else {
+ switch( *(tmp_str+1) ) {
+ case 'a':
+ case 'b':
+ case 't':
+ case 'n':
+ case 'v':
+ case 'f':
+ case 'r':
+ case '0':
+ /* We escaped a special character. For now, keep
+ * both the back-slash and the following char. */
+ tmp_str++; src++;
+ break;
+ default:
+ /* We escaped a space or a single or double quote,
+ * or a back-slash, or a non-escapable char. Remove
+ * the '\' and keep the new current char as is. */
+ memmove( tmp_str, tmp_str + 1, strlen( tmp_str ) );
+ break;
+ }
+ }
+ break;
+ /* Any other char that is special shall appear here.
+ * Example: $ starts a variable
+ case '$':
+ do_variable_expansion();
+ break;
+ * */
+ default:
+ /* any other char is kept as is. */
+ break;
+ }
+ tmp_str++; /* Go to next char */
+ src++; /* Go to next char to find the end of the argument. */
+ }
+ /* End of string, but still no ending quote */
+ if( opt_status & ( ARG_IN_DQUOTES | ARG_IN_SQUOTES ) ) {
+ bb_error_msg_and_die( "unterminated (single or double) quote in options list: %s", src );
+ }
+ *tmp_str = '\0';
+ *dst = xrealloc( *dst, strlen( *dst ) );
+ return src;
+}
+#endif /* CONFIG_FEATURE_MODPROBE_MULTIPLE_OPTIONS */
+
+/*
+ * 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).
+ */
static struct dep_t *build_dep ( void )
{
int fd;
@@ -110,10 +254,11 @@ static struct dep_t *build_dep ( void )
char buffer[2048];
char *filename = buffer;
int continuation_line = 0;
+ int k_version;
k_version = 0;
if ( uname ( &un ))
- return 0;
+ bb_error_msg_and_die("can't determine kernel version");
// check for buffer overflow in following code
if ( bb_strlen ( un.release ) > ( sizeof( buffer ) - 64 )) {
@@ -149,37 +294,43 @@ static struct dep_t *build_dep ( void )
continue;
}
+ /* Is this a new module dep description? */
if ( !continuation_line ) {
+ /* find the dep begining */
char *col = strchr ( buffer, ':' );
char *dot = col;
if ( col ) {
+ /* This line is a dep description */
char *mods;
char *modpath;
char *mod;
+ /* Find the beginning of the module file name */
*col = 0;
mods = strrchr ( buffer, '/' );
if ( !mods )
- mods = buffer;
+ mods = buffer; /* no path for this module */
else
- mods++;
+ mods++; /* there was a path for this module... */
- modpath = strchr ( buffer, '/' );
+ /* find the path of the module */
+ modpath = strchr ( buffer, '/' ); /* ... and this is the path */
if ( !modpath )
- modpath = buffer;
-#if defined(CONFIG_FEATURE_2_6_MODULES)
- if ((k_version > 4) && ( *(col-3) == '.' ) &&
- ( *(col-2) == 'k' ) && ( *(col-1) == 'o' ))
+ modpath = buffer; /* module with no path */
+ /* find the end of the module name in the file name */
+ if ( ENABLE_FEATURE_2_6_MODULES &&
+ (k_version > 4) && ( *(col-3) == '.' ) &&
+ ( *(col-2) == 'k' ) && ( *(col-1) == 'o' ) )
dot = col - 3;
else
-#endif
if (( *(col-2) == '.' ) && ( *(col-1) == 'o' ))
dot = col - 2;
mod = bb_xstrndup ( mods, dot - mods );
+ /* enqueue new module */
if ( !current ) {
first = current = (struct dep_t *) xmalloc ( sizeof ( struct dep_t ));
}
@@ -189,24 +340,26 @@ static struct dep_t *build_dep ( void )
}
current-> m_name = mod;
current-> m_path = bb_xstrdup(modpath);
- current-> m_options = 0;
+ current-> m_options = NULL;
current-> m_isalias = 0;
current-> m_depcnt = 0;
current-> m_deparr = 0;
current-> m_next = 0;
- //printf ( "%s:\n", mod );
p = col + 1;
}
else
+ /* this line is not a dep description */
p = 0;
}
else
+ /* It's a dep description continuation */
p = buffer;
while ( p && *p && isblank(*p))
p++;
+ /* p points to the first dependable module; if NULL, no dependable module */
if ( p && *p ) {
char *end = &buffer [l-1];
char *deps;
@@ -219,6 +372,7 @@ static struct dep_t *build_dep ( void )
do
{
+ /* search the end of the dependency */
next = strchr (p, ' ' );
if (next)
{
@@ -228,6 +382,7 @@ static struct dep_t *build_dep ( void )
else
next = end;
+ /* find the begining of the module file name */
deps = strrchr ( p, '/' );
if ( !deps || ( deps < p )) {
@@ -239,12 +394,12 @@ static struct dep_t *build_dep ( void )
else
deps++;
-#if defined(CONFIG_FEATURE_2_6_MODULES)
- if ((k_version > 4) && ( *(next-2) == '.' ) && *(next-1) == 'k' &&
- ( *next == 'o' ))
+ /* find the end of the module name in the file name */
+ if ( ENABLE_FEATURE_2_6_MODULES &&
+ (k_version > 4) && ( *(next-2) == '.' ) &&
+ ( *(next-1) == 'k' ) && ( *next == 'o' ) )
ext = 3;
else
-#endif
if (( *(next-1) == '.' ) && ( *next == 'o' ))
ext = 2;
@@ -253,16 +408,17 @@ static struct dep_t *build_dep ( void )
continue;
dep = bb_xstrndup ( deps, next - deps - ext + 1 );
+ /* Add the new dependable module name */
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] );
p = next + 2;
} while (next < end);
}
+ /* is there other dependable module(s) ? */
if ( buffer [l-1] == '\\' )
continuation_line = 1;
else
@@ -305,8 +461,7 @@ static struct dep_t *build_dep ( void )
char *alias, *mod;
if ( parse_tag_value ( buffer + 6, &alias, &mod )) {
- // fprintf ( stderr, "ALIAS: '%s' -> '%s'\n", 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 ));
}
@@ -332,18 +487,24 @@ static struct dep_t *build_dep ( void )
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 ) {
- dt-> m_options = xrealloc ( dt-> m_options, bb_strlen( opt ) + 1 );
- strcpy ( dt-> m_options, opt );
-
- // fprintf ( stderr, "OPTION: '%s' -> '%s'\n", dt-> m_name, dt-> m_options );
+ if ( CONFIG_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 );
+ }
}
}
}
@@ -370,6 +531,9 @@ static int already_loaded (const char *name)
p = strchr (buffer, ' ');
if (p) {
*p = 0;
+ for( p = buffer; ENABLE_FEATURE_2_6_MODULES && *p; p++ ) {
+ *p = ((*p)=='-')?'_':*p;
+ }
if (strcmp (name, buffer) == 0) {
close (fd);
return 1;
@@ -381,137 +545,30 @@ static int already_loaded (const char *name)
return 0;
}
-#ifdef CONFIG_FEATURE_MODPROBE_MULTIPLE_OPTIONS
-/* static char* parse_command_string( char* src, char **dst );
- * src: pointer to string containing argument
- * dst: pointer to where to store the parsed argument
- * return value: the pointer to the first char after the parsed argument,
- * NULL if there was no argument parsed (only trailing spaces).
- * Note that memory is allocated with bb_xstrdup when a new argument was
- * parsed. Don't forget to free it!
- */
-#define ARG_EMPTY 0x00
-#define ARG_IN_DQUOTES 0x01
-#define ARG_IN_SQUOTES 0x02
-static char *parse_command_string( char *src, char **dst )
-{
- int opt_status = ARG_EMPTY;
- char* tmp_str;
-
- /* Dumb you, I have nothing to do... */
- if( src == NULL ) return src;
-
- /* Skip leading spaces */
- while( *src == ' ' ) {
- src++;
- }
- /* Is the end of string reached? */
- if( *src == '\0' ) {
- return NULL;
- }
- /* Reached the start of an argument
- * By the way, we duplicate a little too much here :-/ but that's the easy way:
- * cost effective wrt code, cost consumming wrt memory usage. */
- *dst = tmp_str = bb_xstrdup( src );
- /* Get to the end of that argument */
- while( ( *tmp_str != '\0' )
- && ( ( *tmp_str != ' ' )
- || ( opt_status & ( ARG_IN_DQUOTES | ARG_IN_SQUOTES ) ) ) ) {
- switch( *tmp_str ) {
- case '\'':
- if( opt_status & ARG_IN_DQUOTES ) {
- /* Already in double quotes, keep current char as is */
- } else {
- /* shift left 1 char, until end of string: get rid of the opening/closing quotes */
- memmove( tmp_str, tmp_str + 1, strlen( tmp_str ) );
- /* mark me: we enter or leave single quotes */
- opt_status ^= ARG_IN_SQUOTES;
- /* Back one char, as we need to re-scan the new char there. */
- tmp_str--;
- }
- break;
- case '"':
- if( opt_status & ARG_IN_SQUOTES ) {
- /* Already in single quotes, keep current char as is */
- } else {
- /* shift left 1 char, until end of string: get rid of the opening/closing quotes */
- memmove( tmp_str, tmp_str + 1, strlen( tmp_str ) );
- /* mark me: we enter or leave double quotes */
- opt_status ^= ARG_IN_DQUOTES;
- /* Back one char, as we need to re-scan the new char there. */
- tmp_str--;
- }
- break;
- case '\\':
- if( opt_status & ARG_IN_SQUOTES ) {
- /* Between single quotes: keep as is. */
- } else {
- switch( *(tmp_str+1) ) {
- case 'a':
- case 'b':
- case 't':
- case 'n':
- case 'v':
- case 'f':
- case 'r':
- case '0':
- /* We escaped a special character. For now, keep
- * both the back-slash and the following char. */
- tmp_str++; src++;
- break;
- default:
- /* We escaped a space or a single or double quote,
- * or a back-slash, or a non-escapable char. Remove
- * the '\' and keep the new current char as is. */
- memmove( tmp_str, tmp_str + 1, strlen( tmp_str ) );
- break;
- }
- }
- break;
- /* Any other char that is special shall appear here.
- * Example: $ starts a variable
- case '$':
- do_variable_expansion();
- break;
- * */
- default:
- /* any other char is kept as is. */
- break;
- }
- tmp_str++; /* Go to next char */
- src++; /* Go to next char to find the end of the argument. */
- }
- /* End of string, but still no ending quote */
- if( opt_status & ( ARG_IN_DQUOTES | ARG_IN_SQUOTES ) ) {
- bb_error_msg_and_die( "unterminated (single or double) quote in options list: %s", src );
- }
- *tmp_str = '\0';
- return src;
-}
-#endif /* CONFIG_FEATURE_MODPROBE_MULTIPLE_OPTIONS */
-
static int mod_process ( struct mod_list_t *list, int do_insert )
{
int rc = 0;
-#ifdef CONFIG_FEATURE_MODPROBE_MULTIPLE_OPTIONS
char **argv = NULL;
- char *opts;
-#ifdef CONFIG_FEATURE_CLEAN_UP
- int argc_malloc;
-#endif
-#else /* CONFIG_FEATURE_MODPROBE_MULTIPLE_OPTIONS */
- char *argv[10];
-#endif
+ struct mod_opt_t *opts;
+ int argc_malloc; /* never used when CONFIG_FEATURE_CLEAN_UP not defined */
int argc;
while ( list ) {
argc = 0;
-#ifdef CONFIG_FEATURE_MODPROBE_MULTIPLE_OPTIONS
-#ifdef CONFIG_FEATURE_CLEAN_UP
- argc_malloc = 0;
-#endif
- argv = (char**) malloc( 6 * sizeof( char* ) ); /* enough for minimal insmod (5 args + NULL) or rmmod (3 args + NULL) */
-#endif
+ if( ENABLE_FEATURE_CLEAN_UP )
+ argc_malloc = 0;
+ /* If CONFIG_FEATURE_CLEAN_UP is not defined, then we leak memory
+ * each time we allocate memory for argv.
+ * But it is (quite) small amounts of memory that leak each
+ * time a module is loaded, and it is reclaimed when modprobe
+ * exits anyway (even when standalone shell?).
+ * This could become a problem when loading a module with LOTS of
+ * dependencies, with LOTS of options for each dependencies, with
+ * very little memory on the target... But in that case, the module
+ * would not load because there is no more memory, so there's no
+ * problem. */
+ /* enough for minimal insmod (5 args + NULL) or rmmod (3 args + NULL) */
+ argv = (char**) malloc( 6 * sizeof( char* ) );
if ( do_insert ) {
if (already_loaded (list->m_name) != 1) {
argv[argc++] = "insmod";
@@ -524,20 +581,16 @@ static int mod_process ( struct mod_list_t *list, int do_insert )
else if(verbose) /* verbose and quiet are mutually exclusive */
argv[argc++] = "-v";
argv[argc++] = list-> m_path;
-#ifdef CONFIG_FEATURE_MODPROBE_MULTIPLE_OPTIONS
-#ifdef CONFIG_FEATURE_CLEAN_UP
- argc_malloc = argc;
-#endif
+ if( ENABLE_FEATURE_CLEAN_UP )
+ argc_malloc = argc;
opts = list-> m_options;
- while( ( opts = parse_command_string( opts, &(argv[argc]) ) ) != NULL ) {
- /* Increase the argv array by 1 */
+ while( opts ) {
+ /* Add one more option */
argc++;
argv = (char**) xrealloc( argv, ( argc + 1 ) * sizeof( char* ) );
+ argv[argc-1] = opts-> m_opt_val;
+ opts = opts-> m_next;
}
-#else /* CONFIG_FEATURE_MODPROBE_MULTIPLE_OPTIONS */
- if (list-> m_options)
- argv[argc++] = list-> m_options;
-#endif /* CONFIG_FEATURE_MODPROBE_MULTIPLE_OPTIONS */
}
} else {
/* modutils uses short name for removal */
@@ -546,19 +599,15 @@ static int mod_process ( struct mod_list_t *list, int do_insert )
if (do_syslog)
argv[argc++] = "-s";
argv[argc++] = list->m_name;
-#if ( defined CONFIG_FEATURE_MODPROBE_MULTIPLE_OPTIONS ) && ( defined CONFIG_FEATURE_CLEAN_UP )
- argc_malloc = argc;
-#endif
+ if( ENABLE_FEATURE_CLEAN_UP )
+ argc_malloc = argc;
}
}
argv[argc] = NULL;
if (argc) {
if (verbose) {
- int i;
- printf("argc=%d\n", argc );
- for (i=0; i<argc; i++)
- printf("argv[%02d]=\"%s\"\n", i, argv[i]);
+ printf("%s module %s\n", do_insert?"Loading":"Unloading", list-> m_name );
}
if (!show_only) {
int rc2 = 0;
@@ -589,51 +638,48 @@ static int mod_process ( struct mod_list_t *list, int do_insert )
rc = 0; /* success if remove any mod */
}
}
-#if ( defined CONFIG_FEATURE_MODPROBE_MULTIPLE_OPTIONS ) && ( defined CONFIG_FEATURE_CLEAN_UP )
- /* the last value in the array has index == argc, but
- * it is the terminatign NULL, so we must not free it. */
- while( argc_malloc < argc ) {
- free( argv[argc_malloc++] );
+ if( ENABLE_FEATURE_CLEAN_UP )
+ /* the last value in the array has index == argc, but
+ * it is the terminating NULL, so we must not free it. */
+ while( argc_malloc < argc ) {
+ free( argv[argc_malloc++] );
}
}
- free( argv );
- /* If CONFIG_FEATURE_CLEAN_UP is not defined, then we leak memory
- * here. But it is (quite) small amounts of memory that leak each
- * time a module is loaded, and it is reclaimed when modprobe
- * exits anyway.
- * This could become a problem when loading a module with LOTS of
- * dependencies, with LOTS of options for each dependencies, with
- * very little memory on the target... But in that case, the module
- * would not load because there is no more memory, so there's no
- * problem. Hmm, wait... Is this true, whatever the allocation policy? */
- argv = NULL;
-#else /* CONFIG_FEATURE_MODPROBE_MULTIPLE_OPTIONS && CONFIG_FEATURE_CLEAN_UP */
+ if( ENABLE_FEATURE_CLEAN_UP ) {
+ free( argv );
+ argv = NULL;
}
-#endif
list = do_insert ? list-> m_prev : list-> m_next;
}
return (show_only) ? 0 : rc;
}
+/*
+ * Builds the dependency list (aka stack) of a module.
+ * head: the highest module in the stack (last to insmod, first to rmmod)
+ * tail: the lowest module in the stack (first to insmod, last to rmmod)
+ */
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;
+ struct mod_opt_t *opt = 0;
char *path = 0;
// check dependencies
for ( dt = depend; dt; dt = dt-> m_next ) {
if ( strcmp ( dt-> m_name, mod ) == 0) {
- mod = dt-> m_name;
- path = dt-> m_path;
- opt = dt-> m_options;
break;
}
}
+ if( !dt ) {
+ bb_error_msg ("module %s not found.", mod);
+ return;
+ }
+
// resolve alias names
- while ( dt && dt-> m_isalias ) {
+ while ( dt-> m_isalias ) {
if ( dt-> m_depcnt == 1 ) {
struct dep_t *adt;
@@ -642,24 +688,30 @@ static void check_dep ( char *mod, struct mod_list_t **head, struct mod_list_t *
break;
}
if ( adt ) {
+ /* This is the module we are aliased to */
+ struct mod_opt_t *opts = dt-> m_options;
+ /* Option of the alias are appended to the options of the module */
+ while( opts ) {
+ adt-> m_options = append_option( adt-> m_options, opts-> m_opt_val );
+ opts = opts-> m_next;
+ }
dt = adt;
- mod = dt-> m_name;
- path = dt-> m_path;
- if ( !opt )
- opt = dt-> m_options;
}
- else
+ else {
+ bb_error_msg ("module %s not found.", mod);
return;
+ }
}
- else
+ else {
+ bb_error_msg ("Bad alias %s", dt-> m_name);
return;
+ }
}
- if ( !path ) {
- bb_error_msg ("module %s not found.", mod);
- return;
- }
-
+ mod = dt-> m_name;
+ path = dt-> m_path;
+ opt = dt-> m_options;
+
// search for duplicates
for ( find = *head; find; find = find-> m_next ) {
if ( !strcmp ( mod, find-> m_name )) {
@@ -699,6 +751,7 @@ static void check_dep ( char *mod, struct mod_list_t **head, struct mod_list_t *
if ( dt ) {
int i;
+ /* Add all dependable module for that new module */
for ( i = 0; i < dt-> m_depcnt; i++ )
check_dep ( dt-> m_deparr [i], head, tail );
}
@@ -714,24 +767,12 @@ static int mod_insert ( char *mod, int argc, char **argv )
check_dep ( mod, &head, &tail );
if ( head && tail ) {
-#if defined(CONFIG_FEATURE_2_6_MODULES)
- if ( argc ) {
+ 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, " " );
- }
+ head->m_options = append_option( head->m_options, argv[i] );
}
-#endif
// process tail ---> head
rc = mod_process ( tail, 1 );
@@ -766,6 +807,7 @@ static int mod_remove ( char *mod )
extern int modprobe_main(int argc, char** argv)
{
int opt;
+ int rc = EXIT_SUCCESS;
int remove_opt = 0;
autoclean = show_only = quiet = do_syslog = verbose = 0;
@@ -814,7 +856,6 @@ extern int modprobe_main(int argc, char** argv)
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 )) {
@@ -823,15 +864,15 @@ extern int modprobe_main(int argc, char** argv)
rc = EXIT_FAILURE;
}
} while ( ++optind < argc );
+ } else {
+ if (optind >= argc)
+ bb_error_msg_and_die ( "No module or pattern provided\n" );
- return rc;
+ 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] );
}
- if (optind >= argc)
- bb_error_msg_and_die ( "No module or pattern provided\n" );
+ /* Here would be a good place to free up memory allocated during the dependencies build. */
- 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;
+ return rc;
}