+++ /dev/null
-/*
- * libudev - interface to udev device information
- *
- * Copyright (C) 2008-2010 Kay Sievers <kay.sievers@vrfy.org>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- */
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <stddef.h>
-#include <stdbool.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <string.h>
-#include <sys/stat.h>
-
-#include "libudev.h"
-#include "libudev-private.h"
-
-static void udev_device_tag(struct udev_device *dev, const char *tag, bool add)
-{
- const char *id;
- struct udev *udev = udev_device_get_udev(dev);
- char filename[UTIL_PATH_SIZE];
-
- id = udev_device_get_id_filename(dev);
- if (id == NULL)
- return;
- util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/tags/", tag, "/", id, NULL);
-
- if (add) {
- int fd;
-
- util_create_path(udev, filename);
- fd = open(filename, O_WRONLY|O_CREAT|O_CLOEXEC|O_TRUNC|O_NOFOLLOW, 0444);
- if (fd >= 0)
- close(fd);
- } else {
- unlink(filename);
- }
-}
-
-int udev_device_tag_index(struct udev_device *dev, struct udev_device *dev_old, bool add)
-{
- struct udev_list_entry *list_entry;
- bool found;
-
- if (add && dev_old != NULL) {
- /* delete possible left-over tags */
- udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(dev_old)) {
- const char *tag_old = udev_list_entry_get_name(list_entry);
- struct udev_list_entry *list_entry_current;
-
- found = false;
- udev_list_entry_foreach(list_entry_current, udev_device_get_tags_list_entry(dev)) {
- const char *tag = udev_list_entry_get_name(list_entry_current);
-
- if (strcmp(tag, tag_old) == 0) {
- found = true;
- break;
- }
- }
- if (!found)
- udev_device_tag(dev_old, tag_old, false);
- }
- }
-
- udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(dev))
- udev_device_tag(dev, udev_list_entry_get_name(list_entry), add);
-
- return 0;
-}
-
-static bool device_has_info(struct udev_device *udev_device)
-{
- struct udev_list_entry *list_entry;
-
- if (udev_device_get_devlinks_list_entry(udev_device) != NULL)
- return true;
- if (udev_device_get_devlink_priority(udev_device) != 0)
- return true;
- udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(udev_device))
- if (udev_list_entry_get_num(list_entry))
- return true;
- if (udev_device_get_tags_list_entry(udev_device) != NULL)
- return true;
- if (udev_device_get_watch_handle(udev_device) >= 0)
- return true;
- return false;
-}
-
-int udev_device_update_db(struct udev_device *udev_device)
-{
- bool has_info;
- const char *id;
- struct udev *udev = udev_device_get_udev(udev_device);
- char filename[UTIL_PATH_SIZE];
- char filename_tmp[UTIL_PATH_SIZE];
- FILE *f;
-
- id = udev_device_get_id_filename(udev_device);
- if (id == NULL)
- return -1;
-
- has_info = device_has_info(udev_device);
- util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/data/", id, NULL);
-
- /* do not store anything for otherwise empty devices */
- if (!has_info &&
- major(udev_device_get_devnum(udev_device)) == 0 &&
- udev_device_get_ifindex(udev_device) == 0) {
- unlink(filename);
- return 0;
- }
-
- /* write a database file */
- util_strscpyl(filename_tmp, sizeof(filename_tmp), filename, ".tmp", NULL);
- util_create_path(udev, filename_tmp);
- f = fopen(filename_tmp, "we");
- if (f == NULL) {
- err(udev, "unable to create temporary db file '%s': %m\n", filename_tmp);
- return -1;
- }
-
- /*
- * set 'sticky' bit to indicate that we should not clean the
- * database when we transition from initramfs to the real root
- */
- if (udev_device_get_db_persist(udev_device))
- fchmod(fileno(f), 01644);
-
- if (has_info) {
- struct udev_list_entry *list_entry;
-
- if (major(udev_device_get_devnum(udev_device)) > 0) {
- size_t devlen = strlen(udev_get_dev_path(udev))+1;
-
- udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(udev_device))
- fprintf(f, "S:%s\n", &udev_list_entry_get_name(list_entry)[devlen]);
- if (udev_device_get_devlink_priority(udev_device) != 0)
- fprintf(f, "L:%i\n", udev_device_get_devlink_priority(udev_device));
- if (udev_device_get_watch_handle(udev_device) >= 0)
- fprintf(f, "W:%i\n", udev_device_get_watch_handle(udev_device));
- }
-
- if (udev_device_get_usec_initialized(udev_device) > 0)
- fprintf(f, "I:%llu\n", udev_device_get_usec_initialized(udev_device));
-
- udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(udev_device)) {
- if (!udev_list_entry_get_num(list_entry))
- continue;
- fprintf(f, "E:%s=%s\n",
- udev_list_entry_get_name(list_entry),
- udev_list_entry_get_value(list_entry));
- }
-
- udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(udev_device))
- fprintf(f, "G:%s\n", udev_list_entry_get_name(list_entry));
- }
-
- fclose(f);
- rename(filename_tmp, filename);
- info(udev, "created %s file '%s' for '%s'\n", has_info ? "db" : "empty",
- filename, udev_device_get_devpath(udev_device));
- return 0;
-}
-
-int udev_device_delete_db(struct udev_device *udev_device)
-{
- const char *id;
- struct udev *udev = udev_device_get_udev(udev_device);
- char filename[UTIL_PATH_SIZE];
-
- id = udev_device_get_id_filename(udev_device);
- if (id == NULL)
- return -1;
- util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/data/", id, NULL);
- unlink(filename);
- return 0;
-}
~ianmdlvl / elogind.git / blobdiff