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udev: add "udevadm hwdb --test=<modalias>"

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This commit is contained in:
Kay Sievers 2012-10-28 04:41:15 +01:00
parent ff944daa01
commit 23b7245397
2 changed files with 82 additions and 52 deletions
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7
man/udevadm.xml
View File

@ -436,6 +436,13 @@
notified about it.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--test=<replaceable>string</replaceable></option></term>
<listitem>
<para>Query the database with a modalias string, and print the
retrieved properties.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect2>

127
src/udev/udevadm-hwdb.c
View File

@ -471,25 +471,27 @@ static int import_file(struct trie *trie, const char *filename) {
static void help(void) {
printf("Usage: udevadm hwdb [--create] [--help]\n"
" --update update the hardware database\n"
" --test <modalias> query database and print result\n"
" --help\n\n");
}
static int adm_hwdb(struct udev *udev, int argc, char *argv[]) {
static const struct option options[] = {
{ "update", no_argument, NULL, 'u' },
{ "test", required_argument, NULL, 't' },
{ "help", no_argument, NULL, 'h' },
{}
};
const char *test = NULL;
bool update = false;
struct trie *trie;
char **files, **f;
struct trie *trie = NULL;
int err;
int rc = EXIT_SUCCESS;
for (;;) {
int option;
option = getopt_long(argc, argv, "ch", options, NULL);
option = getopt_long(argc, argv, "ut:h", options, NULL);
if (option == -1)
break;
@ -497,71 +499,92 @@ static int adm_hwdb(struct udev *udev, int argc, char *argv[]) {
case 'u':
update = true;
break;
case 't':
test = optarg;
break;
case 'h':
help();
return EXIT_SUCCESS;
}
}
if (!update) {
if (!update && !test) {
help();
return EXIT_SUCCESS;
}
trie = calloc(sizeof(struct trie), 1);
if (!trie) {
rc = EXIT_FAILURE;
goto out;
if (update) {
char **files, **f;
trie = calloc(sizeof(struct trie), 1);
if (!trie) {
rc = EXIT_FAILURE;
goto out;
}
/* string store */
trie->strings = strbuf_new();
if (!trie->strings) {
rc = EXIT_FAILURE;
goto out;
}
/* index */
trie->root = calloc(sizeof(struct trie_node), 1);
if (!trie->root) {
rc = EXIT_FAILURE;
goto out;
}
trie->nodes_count++;
err = conf_files_list_strv(&files, ".hwdb", (const char **)conf_file_dirs);
if (err < 0) {
log_error("failed to enumerate hwdb files: %s\n", strerror(-err));
rc = EXIT_FAILURE;
goto out;
}
STRV_FOREACH(f, files) {
log_debug("reading file '%s'", *f);
import_file(trie, *f);
}
strv_free(files);
strbuf_complete(trie->strings);
log_debug("=== trie in-memory ===\n");
log_debug("nodes: %8zu bytes (%8zu)\n", trie->nodes_count * sizeof(struct trie_node), trie->nodes_count);
log_debug("children arrays: %8zu bytes (%8zu)\n", trie->children_count * sizeof(struct trie_child_entry), trie->children_count);
log_debug("values arrays: %8zu bytes (%8zu)\n", trie->values_count * sizeof(struct trie_value_entry), trie->values_count);
log_debug("strings: %8zu bytes\n", trie->strings->len);
log_debug("strings incoming: %8zu bytes (%8zu)\n", trie->strings->in_len, trie->strings->in_count);
log_debug("strings dedup'ed: %8zu bytes (%8zu)\n", trie->strings->dedup_len, trie->strings->dedup_count);
mkdir_parents("/etc/udev/hwdb.bin", 0755);
err = trie_store(trie, "/etc/udev/hwdb.bin");
if (err < 0) {
log_error("Failure writing hardware database '%s': %s", "/etc/udev/hwdb.bin", strerror(-err));
rc = EXIT_FAILURE;
}
}
/* string store */
trie->strings = strbuf_new();
if (!trie->strings) {
rc = EXIT_FAILURE;
goto out;
}
if (test) {
struct udev_hwdb *hwdb = udev_hwdb_new(udev);
/* index */
trie->root = calloc(sizeof(struct trie_node), 1);
if (!trie->root) {
rc = EXIT_FAILURE;
goto out;
}
trie->nodes_count++;
if (hwdb) {
struct udev_list_entry *entry;
err = conf_files_list_strv(&files, ".hwdb", (const char **)conf_file_dirs);
if (err < 0) {
log_error("failed to enumerate hwdb files: %s\n", strerror(-err));
rc = EXIT_FAILURE;
goto out;
}
STRV_FOREACH(f, files) {
log_debug("reading file '%s'", *f);
import_file(trie, *f);
}
strv_free(files);
strbuf_complete(trie->strings);
log_debug("=== trie in-memory ===\n");
log_debug("nodes: %8zu bytes (%8zu)\n", trie->nodes_count * sizeof(struct trie_node), trie->nodes_count);
log_debug("children arrays: %8zu bytes (%8zu)\n", trie->children_count * sizeof(struct trie_child_entry), trie->children_count);
log_debug("values arrays: %8zu bytes (%8zu)\n", trie->values_count * sizeof(struct trie_value_entry), trie->values_count);
log_debug("strings: %8zu bytes\n", trie->strings->len);
log_debug("strings incoming: %8zu bytes (%8zu)\n", trie->strings->in_len, trie->strings->in_count);
log_debug("strings dedup'ed: %8zu bytes (%8zu)\n", trie->strings->dedup_len, trie->strings->dedup_count);
mkdir_parents("/etc/udev/hwdb.bin", 0755);
err = trie_store(trie, "/etc/udev/hwdb.bin");
if (err < 0) {
log_error("Failure writing hardware database '%s': %s", "/etc/udev/hwdb.bin", strerror(-err));
rc = EXIT_FAILURE;
udev_list_entry_foreach(entry, udev_hwdb_get_properties_list_entry(hwdb, test, 0))
printf("%s=%s\n", udev_list_entry_get_name(entry), udev_list_entry_get_value(entry));
hwdb = udev_hwdb_unref(hwdb);
}
}
out:
if (trie->root)
trie_node_cleanup(trie->root);
strbuf_cleanup(trie->strings);
free(trie);
if (trie) {
if (trie->root)
trie_node_cleanup(trie->root);
strbuf_cleanup(trie->strings);
free(trie);
}
return rc;
}