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#define _GNU_SOURCE
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/utsname.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <list.h>
#include <logging.h>
#include <modprobe.h>
#include <dirent.h>
#include "common.h"
static char *aliasdefault = NULL;
static char * version = NULL;
static void get_version(void) {
if (version != NULL)
return;
struct utsname buf;
uname(&buf);
version = strdup(buf.release);
}
static void free_blacklist(struct module_blacklist *blacklist) {
if (blacklist == NULL)
return;
while (blacklist->next) {
struct module_blacklist *next;
next = blacklist->next;
free(blacklist->modulename);
free(blacklist);
blacklist = next;
}
free(blacklist);
}
char*dirname;
static void set_default_alias_file(void) {
struct utsname rel_buf;
if (!aliasdefault) {
char *dirname;
char *fallback_aliases = table_name_to_file("fallback-modules.alias");
char *aliasfilename;
struct stat st_alias, st_fallback;
uname(&rel_buf);
asprintf(&dirname, "%s/%s", MODULE_DIR, rel_buf.release);
asprintf(&aliasfilename, "%s/modules.alias", dirname);
free(dirname);
/* fallback on ldetect-lst's modules.alias and prefer it if more recent */
if (stat(aliasfilename, &st_alias) ||
(!stat(fallback_aliases, &st_fallback) && st_fallback.st_mtime > st_alias.st_mtime)) {
free(aliasfilename);
aliasdefault = fallback_aliases;
} else {
aliasdefault = aliasfilename;
free(fallback_aliases);
}
}
}
char *modalias_resolve_module(const char *modalias) {
struct module_alias *aliases = NULL;
struct module_blacklist *blacklist = NULL;
struct modprobe_conf conf = {};
LIST_HEAD(list);
if (!aliasdefault)
set_default_alias_file();
get_version();
/* Makes module-init-tools quiet */
set_quiet(1);
/* Returns the resolved alias, options */
parse_toplevel_config(NULL, &conf, 0, 0);
errfn_t error = mod_warn;
aliases = find_matching_aliases(modalias, "", &conf, dirname, error, mit_dry_run, &list);
/* only load blacklisted modules with specific request (no alias) */
apply_blacklist(&aliases, conf.blacklist);
if (!aliases) {
/* We only use canned aliases as last resort. */
char *dkms_file = table_name_to_file("dkms-modules.alias");
const char *alias_filelist[] = {
"/lib/module-init-tools/ldetect-lst-modules.alias",
aliasdefault,
dkms_file,
NULL,
};
const char **alias_file = alias_filelist;
while (!aliases && *alias_file) {
parse_config_file(*alias_file, &conf, 0, 0);
aliases = find_matching_aliases(modalias, "", &conf, dirname, error, mit_dry_run, &list);
apply_blacklist(&aliases, blacklist);
alias_file++;
}
free(dkms_file);
}
free_blacklist(blacklist);
if (aliases) {
char *result;
// take the last one because we find eg: generic/ata_generic/sata_sil
struct module_alias *it = aliases;
while (it->next)
it = it->next;
result = strdup(it->module);
free_aliases(aliases);
return result;
}
return NULL;
}
void modalias_cleanup(void) {
ifree(aliasdefault);
free(version);
version = NULL;
}
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