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

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This commit is contained in:
Rob Landley 2006-04-10 16:09:52 +00:00
parent 6554de06fe
commit 72615752db
1 changed files with 109 additions and 73 deletions
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182
modutils/modprobe.c
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@ -265,6 +265,104 @@ static char *parse_command_string( char *src, char **dst )
#define parse_command_string(src, dst) (0)
#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
@ -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;
include_conf (&first, &current, buffer, sizeof(buffer), fd);
close(fd);
p = strchr ( buffer, '#' );
if ( p )
*p = 0;
filename = bb_xasprintf("/lib/modules/%s/modules.alias", un.release );
l = bb_strlen ( buffer );
if (( fd = open ( filename, O_RDONLY )) < 0 ) {
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 );
}
}
}
}
/* 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;
}