X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fudev%2Fudevadm-hwdb.c;h=3e849aaed6c7eda6e44f68ae7d4529ace5d06484;hb=f3dbb13c8535882be9de14d1cf2b0656c96c89bb;hp=5587094e630533ca0deaaea475416ebf8831541b;hpb=2001208c2ab631a69896d1f670c26846b70d1fb7;p=elogind.git diff --git a/src/udev/udevadm-hwdb.c b/src/udev/udevadm-hwdb.c index 5587094e6..3e849aaed 100644 --- a/src/udev/udevadm-hwdb.c +++ b/src/udev/udevadm-hwdb.c @@ -1,7 +1,7 @@ /*** This file is part of systemd. - Copyright 2012 Kay Sievers + Copyright 2012 Kay Sievers systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by @@ -84,14 +84,12 @@ static int trie_children_cmp(const void *v1, const void *v2) { static int node_add_child(struct trie *trie, struct trie_node *node, struct trie_node *node_child, uint8_t c) { struct trie_child_entry *child; - int err = 0; /* extend array, add new entry, sort for bisection */ child = realloc(node->children, (node->children_count + 1) * sizeof(struct trie_child_entry)); - if (!child) { - err = -ENOMEM; - goto out; - } + if (!child) + return -ENOMEM; + node->children = child; trie->children_count++; node->children[node->children_count].c = c; @@ -99,8 +97,8 @@ static int node_add_child(struct trie *trie, struct trie_node *node, struct trie node->children_count++; qsort(node->children, node->children_count, sizeof(struct trie_child_entry), trie_children_cmp); trie->nodes_count++; -out: - return err; + + return 0; } static struct trie_node *node_lookup(const struct trie_node *node, uint8_t c) { @@ -183,46 +181,44 @@ static int trie_insert(struct trie *trie, struct trie_node *node, const char *se struct trie_node *child; for (p = 0; (c = trie->strings->buf[node->prefix_off + p]); p++) { - char *s; + _cleanup_free_ char *s = NULL; ssize_t off; + _cleanup_free_ struct trie_node *new_child = NULL; if (c == search[i + p]) continue; /* split node */ - child = calloc(sizeof(struct trie_node), 1); - if (!child) { - err = -ENOMEM; - goto out; - } + new_child = calloc(sizeof(struct trie_node), 1); + if (!new_child) + return -ENOMEM; /* move values from parent to child */ - child->prefix_off = node->prefix_off + p+1; - child->children = node->children; - child->children_count = node->children_count; - child->values = node->values; - child->values_count = node->values_count; + new_child->prefix_off = node->prefix_off + p+1; + new_child->children = node->children; + new_child->children_count = node->children_count; + new_child->values = node->values; + new_child->values_count = node->values_count; /* update parent; use strdup() because the source gets realloc()d */ s = strndup(trie->strings->buf + node->prefix_off, p); - if (!s) { - err = -ENOMEM; - goto out; - } + if (!s) + return -ENOMEM; + off = strbuf_add_string(trie->strings, s, p); - free(s); - if (off < 0) { - err = off; - goto out; - } + if (off < 0) + return off; + node->prefix_off = off; node->children = NULL; node->children_count = 0; node->values = NULL; node->values_count = 0; - err = node_add_child(trie, node, child, c); + err = node_add_child(trie, node, new_child, c); if (err) - goto out; + return err; + + new_child = NULL; /* avoid cleanup */ break; } i += p; @@ -237,27 +233,28 @@ static int trie_insert(struct trie *trie, struct trie_node *node, const char *se /* new child */ child = calloc(sizeof(struct trie_node), 1); - if (!child) { - err = -ENOMEM; - goto out; - } + if (!child) + return -ENOMEM; + off = strbuf_add_string(trie->strings, search + i+1, strlen(search + i+1)); if (off < 0) { - err = off; - goto out; + free(child); + return off; } + child->prefix_off = off; err = node_add_child(trie, node, child, c); - if (err) - goto out; + if (err) { + free(child); + return err; + } + return trie_node_add_value(trie, child, key, value); } node = child; i++; } -out: - return err; } struct trie_f { @@ -469,27 +466,32 @@ static int import_file(struct trie *trie, const char *filename) { } static void help(void) { - printf("Usage: udevadm hwdb [--create] [--help]\n" + printf("Usage: udevadm hwdb OPTIONS\n" " --update update the hardware database\n" + " --test= query database and print result\n" + " --root= alternative root path in the filesystem\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' }, + { "root", required_argument, NULL, 'r' }, + { "test", required_argument, NULL, 't' }, { "help", no_argument, NULL, 'h' }, {} }; + const char *test = NULL; + const char *root = ""; 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:r:h", options, NULL); if (option == -1) break; @@ -497,71 +499,106 @@ static int adm_hwdb(struct udev *udev, int argc, char *argv[]) { case 'u': update = true; break; + case 't': + test = optarg; + break; + case 'r': + root = 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; + _cleanup_free_ char *hwdb_bin = NULL; - /* string store */ - trie->strings = strbuf_new(); - if (!trie->strings) { - rc = EXIT_FAILURE; - goto out; - } + trie = calloc(sizeof(struct trie), 1); + if (!trie) { + 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++; + /* string store */ + trie->strings = strbuf_new(); + if (!trie->strings) { + rc = EXIT_FAILURE; + goto out; + } - 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); + /* 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", root, 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); + + if (asprintf(&hwdb_bin, "%s/etc/udev/hwdb.bin", root) < 0) { + rc = EXIT_FAILURE; + goto out; + } + mkdir_parents(hwdb_bin, 0755); + err = trie_store(trie, hwdb_bin); + if (err < 0) { + log_error("Failure writing database %s: %s", hwdb_bin, strerror(-err)); + rc = EXIT_FAILURE; + } } - 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; + + if (test) { + struct udev_hwdb *hwdb = udev_hwdb_new(udev); + + if (hwdb) { + struct udev_list_entry *entry; + + 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; }