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udevadm-hwdb: modernize code a bit

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This commit is contained in:
Yu Watanabe 2018-08-21 11:28:26 +09:00
parent f73fc95ea5
commit b77200b6ba
1 changed files with 140 additions and 118 deletions
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258
src/udev/udevadm-hwdb.c
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@ -13,11 +13,11 @@
#include "hwdb-util.h"
#include "label.h"
#include "mkdir.h"
#include "path-util.h"
#include "strbuf.h"
#include "string-util.h"
#include "udev.h"
#include "udevadm.h"
#include "udevadm-util.h"
#include "util.h"
/*
@ -25,6 +25,12 @@
* Uses a Patricia/radix trie to index all matches for efficient lookup.
*/
static const char *arg_test = NULL;
static const char *arg_root = NULL;
static const char *arg_hwdb_bin_dir = "/etc/udev";
static bool arg_update = false;
static bool arg_strict = false;
static const char * const conf_file_dirs[] = {
"/etc/udev/hwdb.d",
UDEVLIBEXECDIR "/hwdb.d",
@ -108,6 +114,9 @@ static struct trie_node *node_lookup(const struct trie_node *node, uint8_t c) {
static void trie_node_cleanup(struct trie_node *node) {
size_t i;
if (!node)
return;
for (i = 0; i < node->children_count; i++)
trie_node_cleanup(node->children[i].child);
free(node->children);
@ -115,6 +124,17 @@ static void trie_node_cleanup(struct trie_node *node) {
free(node);
}
static void trie_free(struct trie *trie) {
if (!trie)
return;
trie_node_cleanup(trie->root);
strbuf_cleanup(trie->strings);
free(trie);
}
DEFINE_TRIVIAL_CLEANUP_FUNC(struct trie*, trie_free);
static int trie_values_cmp(const void *v1, const void *v2, void *arg) {
const struct trie_value_entry *val1 = v1;
const struct trie_value_entry *val2 = v2;
@ -539,7 +559,87 @@ static int import_file(struct trie *trie, const char *filename) {
return r;
}
static void help(void) {
static int hwdb_update(void) {
_cleanup_(trie_freep) struct trie *trie = NULL;
_cleanup_strv_free_ char **files = NULL;
_cleanup_free_ char *hwdb_bin = NULL;
char **f;
int r;
trie = new0(struct trie, 1);
if (!trie)
return -ENOMEM;
/* string store */
trie->strings = strbuf_new();
if (!trie->strings)
return -ENOMEM;
/* index */
trie->root = new0(struct trie_node, 1);
if (!trie->root)
return -ENOMEM;
trie->nodes_count++;
r = conf_files_list_strv(&files, ".hwdb", arg_root, 0, conf_file_dirs);
if (r < 0)
return log_error_errno(r, "failed to enumerate hwdb files: %m");
STRV_FOREACH(f, files) {
log_debug("Reading file '%s'", *f);
r = import_file(trie, *f);
if (r < 0 && arg_strict)
return r;
}
strbuf_complete(trie->strings);
log_debug("=== trie in-memory ===");
log_debug("nodes: %8zu bytes (%8zu)",
trie->nodes_count * sizeof(struct trie_node), trie->nodes_count);
log_debug("children arrays: %8zu bytes (%8zu)",
trie->children_count * sizeof(struct trie_child_entry), trie->children_count);
log_debug("values arrays: %8zu bytes (%8zu)",
trie->values_count * sizeof(struct trie_value_entry), trie->values_count);
log_debug("strings: %8zu bytes",
trie->strings->len);
log_debug("strings incoming: %8zu bytes (%8zu)",
trie->strings->in_len, trie->strings->in_count);
log_debug("strings dedup'ed: %8zu bytes (%8zu)",
trie->strings->dedup_len, trie->strings->dedup_count);
hwdb_bin = path_join(arg_root, arg_hwdb_bin_dir, "/hwdb.bin");
if (!hwdb_bin)
return -ENOMEM;
mkdir_parents_label(hwdb_bin, 0755);
r = trie_store(trie, hwdb_bin);
if (r < 0)
log_error_errno(r, "Failed to write database %s: %m", hwdb_bin);
(void) label_fix(hwdb_bin, 0);
return r;
}
static int hwdb_test(void) {
_cleanup_(sd_hwdb_unrefp) sd_hwdb *hwdb = NULL;
const char *key, *value;
int r;
r = sd_hwdb_new(&hwdb);
if (r < 0)
return r;
SD_HWDB_FOREACH_PROPERTY(hwdb, arg_test, key, value)
printf("%s=%s\n", key, value);
return 0;
}
static int help(void) {
printf("%s hwdb [OPTIONS]\n\n"
" -h --help Print this message\n"
" -V --version Print version of the program\n"
@ -552,9 +652,11 @@ static void help(void) {
"The sub-command 'hwdb' is deprecated, and is left for backwards compatibility.\n"
"Please use systemd-hwdb instead.\n"
, program_invocation_short_name);
return 0;
}
int hwdb_main(int argc, char *argv[], void *userdata) {
static int parse_argv(int argc, char *argv[]) {
enum {
ARG_USR = 0x100,
};
@ -569,139 +671,59 @@ int hwdb_main(int argc, char *argv[], void *userdata) {
{ "help", no_argument, NULL, 'h' },
{}
};
const char *test = NULL;
const char *root = "";
const char *hwdb_bin_dir = "/etc/udev";
bool update = false;
struct trie *trie = NULL;
int err, c;
int rc = EXIT_SUCCESS;
bool strict = false;
int c;
while ((c = getopt_long(argc, argv, "ust:r:Vh", options, NULL)) >= 0)
switch(c) {
case 'u':
update = true;
arg_update = true;
break;
case ARG_USR:
hwdb_bin_dir = UDEVLIBEXECDIR;
arg_hwdb_bin_dir = UDEVLIBEXECDIR;
break;
case 's':
strict = true;
arg_strict = true;
break;
case 't':
test = optarg;
arg_test = optarg;
break;
case 'r':
root = optarg;
arg_root = optarg;
break;
case 'V':
print_version();
return EXIT_SUCCESS;
return version();
case 'h':
help();
return EXIT_SUCCESS;
return help();
case '?':
return EXIT_FAILURE;
return -EINVAL;
default:
assert_not_reached("Unknown option");
}
if (!update && !test) {
log_error("Either --update or --test must be used");
return EXIT_FAILURE;
}
if (update) {
char **files, **f;
_cleanup_free_ char *hwdb_bin = NULL;
trie = new0(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 = new0(struct trie_node, 1);
if (!trie->root) {
rc = EXIT_FAILURE;
goto out;
}
trie->nodes_count++;
err = conf_files_list_strv(&files, ".hwdb", root, 0, conf_file_dirs);
if (err < 0) {
log_error_errno(err, "failed to enumerate hwdb files: %m");
rc = EXIT_FAILURE;
goto out;
}
STRV_FOREACH(f, files) {
log_debug("reading file '%s'", *f);
if (import_file(trie, *f) < 0 && strict)
rc = EXIT_FAILURE;
}
strv_free(files);
strbuf_complete(trie->strings);
log_debug("=== trie in-memory ===");
log_debug("nodes: %8zu bytes (%8zu)",
trie->nodes_count * sizeof(struct trie_node), trie->nodes_count);
log_debug("children arrays: %8zu bytes (%8zu)",
trie->children_count * sizeof(struct trie_child_entry), trie->children_count);
log_debug("values arrays: %8zu bytes (%8zu)",
trie->values_count * sizeof(struct trie_value_entry), trie->values_count);
log_debug("strings: %8zu bytes",
trie->strings->len);
log_debug("strings incoming: %8zu bytes (%8zu)",
trie->strings->in_len, trie->strings->in_count);
log_debug("strings dedup'ed: %8zu bytes (%8zu)",
trie->strings->dedup_len, trie->strings->dedup_count);
hwdb_bin = strjoin(root, "/", hwdb_bin_dir, "/hwdb.bin");
if (!hwdb_bin) {
rc = EXIT_FAILURE;
goto out;
}
mkdir_parents_label(hwdb_bin, 0755);
err = trie_store(trie, hwdb_bin);
if (err < 0) {
log_error_errno(err, "Failure writing database %s: %m", hwdb_bin);
rc = EXIT_FAILURE;
}
(void) label_fix(hwdb_bin, 0);
}
if (test) {
_cleanup_(sd_hwdb_unrefp) sd_hwdb *hwdb = NULL;
int r;
r = sd_hwdb_new(&hwdb);
if (r >= 0) {
const char *key, *value;
SD_HWDB_FOREACH_PROPERTY(hwdb, test, key, value)
printf("%s=%s\n", key, value);
}
}
out:
if (trie) {
if (trie->root)
trie_node_cleanup(trie->root);
if (trie->strings)
strbuf_cleanup(trie->strings);
free(trie);
}
return rc;
return 1;
}
int hwdb_main(int argc, char *argv[], void *userdata) {
int r;
r = parse_argv(argc, argv);
if (r < 0)
return r;
if (!arg_update && !arg_test) {
log_error("Either --update or --test must be used.");
return -EINVAL;
}
if (arg_update) {
r = hwdb_update();
if (r < 0)
return r;
}
if (arg_test)
return hwdb_test();
return 0;
}