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#define _GNU_SOURCE |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <sys/wait.h> |
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#include <sys/utsname.h> |
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#include <fcntl.h> |
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#include <unistd.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <libkmod.h> |
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#include <dirent.h> |
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#include "common.h" |
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|
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static char *aliasdefault = NULL; |
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static char * version = NULL; |
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|
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static void get_version(void) { |
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if (version != NULL) |
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return; |
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struct utsname buf; |
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uname(&buf); |
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version = strdup(buf.release); |
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} |
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|
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|
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char *dirname, *dkms_file; |
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|
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static void set_default_alias_file(void) { |
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struct utsname rel_buf; |
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if (!aliasdefault) { |
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char *dirname; |
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char *fallback_aliases = table_name_to_file("fallback-modules.alias"); |
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char *aliasfilename; |
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struct stat st_alias, st_fallback; |
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|
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uname(&rel_buf); |
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asprintf(&dirname, "%s/%s", "/lib/modules", rel_buf.release); |
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asprintf(&aliasfilename, "%s/modules.alias", dirname); |
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free(dirname); |
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|
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/* fallback on ldetect-lst's modules.alias and prefer it if more recent */ |
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if (stat(aliasfilename, &st_alias) || |
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(!stat(fallback_aliases, &st_fallback) && st_fallback.st_mtime > st_alias.st_mtime)) { |
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free(aliasfilename); |
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aliasdefault = fallback_aliases; |
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} else { |
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aliasdefault = aliasfilename; |
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free(fallback_aliases); |
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} |
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} |
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} |
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|
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struct kmod_ctx* modalias_init() { |
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struct kmod_ctx *ctx; |
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|
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if (!aliasdefault) |
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set_default_alias_file(); |
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|
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get_version(); |
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|
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/* We only use canned aliases as last resort. */ |
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dkms_file = table_name_to_file("dkms-modules.alias"); |
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const char *alias_filelist[] = { |
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"/run/modprobe.d", |
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"/etc/modprobe.d", |
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"/lib/modprobe.d", |
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"/lib/module-init-tools/ldetect-lst-modules.alias", |
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aliasdefault, |
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dkms_file, |
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NULL, |
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}; |
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|
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/* Init libkmod */ |
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ctx = kmod_new(dirname, alias_filelist); |
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if (!ctx) { |
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fputs("Error: kmod_new() failed!\n", stderr); |
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free(dkms_file); |
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kmod_unref(ctx); |
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ctx = NULL; |
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} |
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kmod_load_resources(ctx); |
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return ctx; |
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} |
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|
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char *modalias_resolve_module(struct kmod_ctx *ctx, const char *modalias) { |
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struct kmod_list *l, *list = NULL; |
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char *str = NULL; |
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int err = kmod_module_new_from_lookup(ctx, modalias, &list); |
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if (err < 0) |
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goto exit; |
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|
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// No module found... |
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if (list == NULL) |
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goto exit; |
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|
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// filter through blacklist |
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struct kmod_list *filtered = NULL; |
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err = kmod_module_get_filtered_blacklist(ctx, list, &filtered); |
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kmod_module_unref_list(list); |
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if (err <0) |
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goto exit; |
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list = filtered; |
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|
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kmod_list_foreach(l, list) { |
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struct kmod_module *mod = kmod_module_get_module(l); |
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//if (str) // keep last one |
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// free(str); |
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if (!str) // keep first one |
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str = strdup(kmod_module_get_name(mod)); |
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kmod_module_unref(mod); |
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if (err < 0) |
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break; |
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} |
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|
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kmod_module_unref_list(list); |
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|
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exit: |
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return str; |
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} |
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|
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void modalias_cleanup(struct kmod_ctx *ctx) { |
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ifree(aliasdefault); |
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ifree(version); |
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free(dkms_file); |
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kmod_unref(ctx); |
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} |