1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include <stdio.h>

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include <errno.h>

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include <string.h>

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include <inttypes.h>

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering#include <ctype.h>

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering#include <stdlib.h>

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering#include <fnmatch.h>

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering#include <getopt.h>

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering#include <sys/mman.h>

c34255bdb217c2a1d3ac6348252437ab8be9ca46Lennart Poettering

1ddb263d21099ae42195c2bc382bdf72a7f24f82Lennart Poettering#include "libudev-private.h"

ebeccf9eecf5939a2ef772c3160e89efcad96194Lennart Poettering#include "libudev-hwdb-def.h"

6482f6269c87d2249e52e889a63adbdd50f2d691Ronny Chevalier

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poetteringstruct udev_hwdb {

d3e84ddb885e9d5f0ae9930eb905910e3a81f157Lennart Poettering struct udev *udev;

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering int refcount;

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering FILE *f;

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering struct stat st;

afc6adb5ec7e73bc13156c43f52fb015cd80cc68Lennart Poettering union {

a658cafa98ab55ea948c29bc87eb3945d515fb41Lennart Poettering struct trie_header_f *head;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering const char *map;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering };

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering struct udev_list properties_list;

cde93897cdefdd7c7f66c400a61e42ceee5f6a46Lennart Poettering};

cde93897cdefdd7c7f66c400a61e42ceee5f6a46Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poetteringstruct linebuf {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering char bytes[LINE_MAX];

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering size_t size;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering size_t len;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering};

1ddb263d21099ae42195c2bc382bdf72a7f24f82Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poetteringstatic void linebuf_init(struct linebuf *buf) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering buf->size = 0;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering buf->len = 0;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering}

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poetteringstatic const char *linebuf_get(struct linebuf *buf) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (buf->len + 1 >= sizeof(buf->bytes))

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return NULL;

d3e84ddb885e9d5f0ae9930eb905910e3a81f157Lennart Poettering buf->bytes[buf->len] = '\0';

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return buf->bytes;

1ddb263d21099ae42195c2bc382bdf72a7f24f82Lennart Poettering}

1ddb263d21099ae42195c2bc382bdf72a7f24f82Lennart Poettering

1ddb263d21099ae42195c2bc382bdf72a7f24f82Lennart Poetteringstatic bool linebuf_add(struct linebuf *buf, const char *s, size_t len) {

1ddb263d21099ae42195c2bc382bdf72a7f24f82Lennart Poettering if (buf->len + len >= sizeof(buf->bytes))

1ddb263d21099ae42195c2bc382bdf72a7f24f82Lennart Poettering return false;

1ddb263d21099ae42195c2bc382bdf72a7f24f82Lennart Poettering memcpy(buf->bytes + buf->len, s, len);

1ddb263d21099ae42195c2bc382bdf72a7f24f82Lennart Poettering buf->len += len;

d04c1fb8e215600b4950c6778c6c16ddafc14024Lennart Poettering return true;

d04c1fb8e215600b4950c6778c6c16ddafc14024Lennart Poettering}

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poetteringstatic bool linebuf_add_char(struct linebuf *buf, char c)

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering{

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering if (buf->len + 1 >= sizeof(buf->bytes))

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering return false;

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering buf->bytes[buf->len++] = c;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return true;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering}

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poetteringstatic void linebuf_rem(struct linebuf *buf, size_t count) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering assert(buf->len >= count);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering buf->len -= count;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering}

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poetteringstatic void linebuf_rem_char(struct linebuf *buf) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering linebuf_rem(buf, 1);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering}

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poetteringstatic const struct trie_child_entry_f *trie_node_children(struct udev_hwdb *hwdb, const struct trie_node_f *node) {

56f64d95763a799ba4475daf44d8e9f72a1bd474Michal Schmidt return (const struct trie_child_entry_f *)((const char *)node + le64toh(hwdb->head->node_size));

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering}

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poetteringstatic const struct trie_value_entry_f *trie_node_values(struct udev_hwdb *hwdb, const struct trie_node_f *node) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering const char *base = (const char *)node;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering base += le64toh(hwdb->head->node_size);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering base += node->children_count * le64toh(hwdb->head->child_entry_size);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return (const struct trie_value_entry_f *)base;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering}

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

b87633c4b20e3221748d6c98336cf6c85123cd66Lennart Poetteringstatic const struct trie_node_f *trie_node_from_off(struct udev_hwdb *hwdb, le64_t off) {

b87633c4b20e3221748d6c98336cf6c85123cd66Lennart Poettering return (const struct trie_node_f *)(hwdb->map + le64toh(off));

b87633c4b20e3221748d6c98336cf6c85123cd66Lennart Poettering}

b87633c4b20e3221748d6c98336cf6c85123cd66Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poetteringstatic const char *trie_string(struct udev_hwdb *hwdb, le64_t off) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return hwdb->map + le64toh(off);

da927ba997d68401563b927f92e6e40e021a8e5cMichal Schmidt}

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poetteringstatic int trie_children_cmp_f(const void *v1, const void *v2) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering const struct trie_child_entry_f *n1 = v1;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering const struct trie_child_entry_f *n2 = v2;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return n1->c - n2->c;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering}

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poetteringstatic const struct trie_node_f *node_lookup_f(struct udev_hwdb *hwdb, const struct trie_node_f *node, uint8_t c) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering struct trie_child_entry_f *child;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering struct trie_child_entry_f search;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering search.c = c;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering child = bsearch(&search, trie_node_children(hwdb, node), node->children_count,

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering le64toh(hwdb->head->child_entry_size), trie_children_cmp_f);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (child)

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering return trie_node_from_off(hwdb, child->child_off);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return NULL;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering}

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poetteringstatic int hwdb_add_property(struct udev_hwdb *hwdb, const char *key, const char *value) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering /* TODO: add sub-matches (+) against DMI data */

76b543756ef69ce69784d571aefe8de65eaeb331Lennart Poettering if (key[0] != ' ')

f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt return 0;

f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt if (udev_list_entry_add(&hwdb->properties_list, key+1, value) == NULL)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return -ENOMEM;

19befb2d5fc087f96e40ddc432b2cc9385666209Lennart Poettering return 0;

f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt}

f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poetteringstatic int trie_fnmatch_f(struct udev_hwdb *hwdb, const struct trie_node_f *node, size_t p,

19befb2d5fc087f96e40ddc432b2cc9385666209Lennart Poettering struct linebuf *buf, const char *search) {

f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt size_t len;

f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt size_t i;

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering const char *prefix;

19befb2d5fc087f96e40ddc432b2cc9385666209Lennart Poettering int err;

f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt

f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt prefix = trie_string(hwdb, node->prefix_off);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering len = strlen(prefix + p);

ebeccf9eecf5939a2ef772c3160e89efcad96194Lennart Poettering linebuf_add(buf, prefix + p, len);

ebeccf9eecf5939a2ef772c3160e89efcad96194Lennart Poettering

ebeccf9eecf5939a2ef772c3160e89efcad96194Lennart Poettering for (i = 0; i < node->children_count; i++) {

ebeccf9eecf5939a2ef772c3160e89efcad96194Lennart Poettering const struct trie_child_entry_f *child = &trie_node_children(hwdb, node)[i];

ebeccf9eecf5939a2ef772c3160e89efcad96194Lennart Poettering

ebeccf9eecf5939a2ef772c3160e89efcad96194Lennart Poettering linebuf_add_char(buf, child->c);

ebeccf9eecf5939a2ef772c3160e89efcad96194Lennart Poettering err = trie_fnmatch_f(hwdb, trie_node_from_off(hwdb, child->child_off), 0, buf, search);

ebeccf9eecf5939a2ef772c3160e89efcad96194Lennart Poettering if (err < 0)

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering return err;

19befb2d5fc087f96e40ddc432b2cc9385666209Lennart Poettering linebuf_rem_char(buf);

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering }

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering if (node->values_count && fnmatch(linebuf_get(buf), search, 0) == 0)

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering for (i = 0; i < node->values_count; i++) {

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering err = hwdb_add_property(hwdb, trie_string(hwdb, trie_node_values(hwdb, node)[i].key_off),

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering trie_string(hwdb, trie_node_values(hwdb, node)[i].value_off));

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering if (err < 0)

f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt return err;

f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering linebuf_rem(buf, len);

19befb2d5fc087f96e40ddc432b2cc9385666209Lennart Poettering return 0;

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering}

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poetteringstatic int trie_search_f(struct udev_hwdb *hwdb, const char *search) {

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering struct linebuf buf;

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering const struct trie_node_f *node;

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering size_t i = 0;

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering int err;

f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt

f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt linebuf_init(&buf);

943aca8efb39453e3994ccdd1e08534b788c5aeeLennart Poettering

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering node = trie_node_from_off(hwdb, hwdb->head->nodes_root_off);

19befb2d5fc087f96e40ddc432b2cc9385666209Lennart Poettering while (node) {

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering const struct trie_node_f *child;

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering size_t p = 0;

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering

11b90e69e5620c2483b019340eff121d504db115Lennart Poettering if (node->prefix_off) {

11b90e69e5620c2483b019340eff121d504db115Lennart Poettering uint8_t c;

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering for (; (c = trie_string(hwdb, node->prefix_off)[p]); p++) {

f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt if (c == '*' || c == '?' || c == '[')

f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt return trie_fnmatch_f(hwdb, node, p, &buf, search + i + p);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (c != search[i + p])

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering return 0;

19befb2d5fc087f96e40ddc432b2cc9385666209Lennart Poettering }

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering i += p;

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering }

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering child = node_lookup_f(hwdb, node, '*');

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering if (child) {

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering linebuf_add_char(&buf, '*');

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering err = trie_fnmatch_f(hwdb, child, 0, &buf, search + i);

f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt if (err < 0)

f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt return err;

6797c324a653f119a3d7133122648aaa4878ddd6Lennart Poettering linebuf_rem_char(&buf);

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering child = node_lookup_f(hwdb, node, '?');

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (child) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering linebuf_add_char(&buf, '?');

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering err = trie_fnmatch_f(hwdb, child, 0, &buf, search + i);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (err < 0)

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering return err;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering linebuf_rem_char(&buf);

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering }

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering child = node_lookup_f(hwdb, node, '[');

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (child) {

5bb658a1784a0fd4f0f32adb4b1fb636ff503f7dKay Sievers linebuf_add_char(&buf, '[');

f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt err = trie_fnmatch_f(hwdb, child, 0, &buf, search + i);

f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt if (err < 0)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return err;

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering linebuf_rem_char(&buf);

f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt }

f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (search[i] == '\0') {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering size_t n;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering for (n = 0; n < node->values_count; n++) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering err = hwdb_add_property(hwdb, trie_string(hwdb, trie_node_values(hwdb, node)[n].key_off),

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering trie_string(hwdb, trie_node_values(hwdb, node)[n].value_off));

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (err < 0)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return err;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return 0;

71fda00f320379f5cbee8e118848de98caaa229dLennart Poettering }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering child = node_lookup_f(hwdb, node, search[i]);

a658cafa98ab55ea948c29bc87eb3945d515fb41Lennart Poettering node = child;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering i++;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return 0;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering}

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering_public_ struct udev_hwdb *udev_hwdb_new(struct udev *udev) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering struct udev_hwdb *hwdb;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering const char sig[] = HWDB_SIG;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering hwdb = new0(struct udev_hwdb, 1);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (!hwdb)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return NULL;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering hwdb->refcount = 1;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering udev_list_init(udev, &hwdb->properties_list, true);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering hwdb->f = fopen("/etc/udev/hwdb.bin", "re");

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (!hwdb->f) {

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering log_debug("error reading /etc/udev/hwdb.bin: %m");

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering udev_hwdb_unref(hwdb);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return NULL;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

d9e34bfda3d34dcde00a876cb052e7de0655e1cbLennart Poettering if (fstat(fileno(hwdb->f), &hwdb->st) < 0 ||

d9e34bfda3d34dcde00a876cb052e7de0655e1cbLennart Poettering (size_t)hwdb->st.st_size < offsetof(struct trie_header_f, strings_len) + 8) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering log_debug("error reading /etc/udev/hwdb.bin: %m");

d9e34bfda3d34dcde00a876cb052e7de0655e1cbLennart Poettering udev_hwdb_unref(hwdb);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return NULL;

d9e34bfda3d34dcde00a876cb052e7de0655e1cbLennart Poettering }

d9e34bfda3d34dcde00a876cb052e7de0655e1cbLennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering hwdb->map = mmap(0, hwdb->st.st_size, PROT_READ, MAP_SHARED, fileno(hwdb->f), 0);

d9e34bfda3d34dcde00a876cb052e7de0655e1cbLennart Poettering if (hwdb->map == MAP_FAILED) {

d9e34bfda3d34dcde00a876cb052e7de0655e1cbLennart Poettering log_debug("error mapping /etc/udev/hwdb.bin: %m");

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering udev_hwdb_unref(hwdb);

d9e34bfda3d34dcde00a876cb052e7de0655e1cbLennart Poettering return NULL;

d9e34bfda3d34dcde00a876cb052e7de0655e1cbLennart Poettering }

d9e34bfda3d34dcde00a876cb052e7de0655e1cbLennart Poettering

d9e34bfda3d34dcde00a876cb052e7de0655e1cbLennart Poettering if (memcmp(hwdb->map, sig, sizeof(hwdb->head->signature)) != 0 ||

d9e34bfda3d34dcde00a876cb052e7de0655e1cbLennart Poettering (size_t)hwdb->st.st_size != le64toh(hwdb->head->file_size)) {

d9e34bfda3d34dcde00a876cb052e7de0655e1cbLennart Poettering log_debug("error recognizing the format of /etc/udev/hwdb.bin");

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering udev_hwdb_unref(hwdb);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return NULL;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering }

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering log_debug("=== trie on-disk ===\n");

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering log_debug("tool version: %llu", (unsigned long long)le64toh(hwdb->head->tool_version));

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering log_debug("file size: %8llu bytes\n", (unsigned long long)hwdb->st.st_size);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering log_debug("header size %8llu bytes\n", (unsigned long long)le64toh(hwdb->head->header_size));

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering log_debug("strings %8llu bytes\n", (unsigned long long)le64toh(hwdb->head->strings_len));

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering log_debug("nodes %8llu bytes\n", (unsigned long long)le64toh(hwdb->head->nodes_len));

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return hwdb;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering}

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering_public_ struct udev_hwdb *udev_hwdb_ref(struct udev_hwdb *hwdb) {

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering if (!hwdb)

c335068380fe8c9d843cdb2cf8a00f822cfabed3Lennart Poettering return NULL;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering hwdb->refcount++;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return hwdb;

0370612e0522191f929e3feb7d4937fff3d421e2Lennart Poettering}

0370612e0522191f929e3feb7d4937fff3d421e2Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering_public_ struct udev_hwdb *udev_hwdb_unref(struct udev_hwdb *hwdb) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (!hwdb)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return NULL;

de0671ee7fe465e108f62dcbbbe9366f81dd9e9aZbigniew Jędrzejewski-Szmek hwdb->refcount--;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (hwdb->refcount > 0)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return hwdb;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (hwdb->f)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering fclose(hwdb->f);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (hwdb->map)

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering munmap((void *)hwdb->map, hwdb->st.st_size);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering udev_list_cleanup(&hwdb->properties_list);

de0671ee7fe465e108f62dcbbbe9366f81dd9e9aZbigniew Jędrzejewski-Szmek free(hwdb);

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering return NULL;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering}

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poetteringbool udev_hwdb_validate(struct udev_hwdb *hwdb) {

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering struct stat st;

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering

1ee306e1248866617c96ed9f4263f375588ad838Lennart Poettering if (!hwdb)

return false;

if (!hwdb->f)

return false;

if (fstat(fileno(hwdb->f), &st) < 0)

return true;

if (ts_usec(&hwdb->st.st_mtim) != ts_usec(&st.st_mtim))

return true;

return false;

}

_public_ struct udev_list_entry *udev_hwdb_get_properties_list_entry(struct udev_hwdb *hwdb, const char *modalias, unsigned int flags) {

int err;

if (!hwdb->f) {

errno = EINVAL;

return NULL;

}

err = trie_search_f(hwdb, modalias);

if (err < 0) {

errno = -err;

return NULL;

}

return udev_list_get_entry(&hwdb->properties_list);

}