2003-10-17 10:40:02 +02:00
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/*
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2009-03-26 19:29:36 +01:00
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* libudev - interface to udev device information
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2003-10-17 10:40:02 +02:00
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*
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2010-04-22 18:12:36 +02:00
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* Copyright (C) 2008-2010 Kay Sievers <kay.sievers@vrfy.org>
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2008-09-10 02:40:42 +02:00
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*
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2009-03-26 19:29:36 +01:00
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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2003-10-17 10:40:02 +02:00
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*/
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2003-08-06 08:57:23 +02:00
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#include <stdlib.h>
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#include <stdio.h>
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2004-03-02 08:47:59 +01:00
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#include <string.h>
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2004-03-23 07:22:20 +01:00
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#include <stddef.h>
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2010-04-22 18:12:36 +02:00
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#include <stdbool.h>
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2005-03-06 12:16:32 +01:00
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#include <unistd.h>
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2003-08-06 08:57:23 +02:00
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#include <fcntl.h>
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#include <string.h>
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2006-08-24 00:13:07 +02:00
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#include <sys/stat.h>
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2003-08-06 08:57:23 +02:00
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2009-06-09 23:05:25 +02:00
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#include "libudev.h"
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#include "libudev-private.h"
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2004-11-06 14:28:01 +01:00
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2010-04-23 09:01:56 +02:00
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static void udev_device_tag(struct udev_device *dev, const char *tag, bool add)
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2010-04-22 18:12:36 +02:00
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{
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2012-01-10 01:34:15 +01:00
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const char *id;
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struct udev *udev = udev_device_get_udev(dev);
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char filename[UTIL_PATH_SIZE];
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id = udev_device_get_id_filename(dev);
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if (id == NULL)
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return;
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2012-04-16 17:21:22 +02:00
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util_strscpyl(filename, sizeof(filename), TEST_PREFIX "/run/udev/tags/", tag, "/", id, NULL);
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2012-01-10 01:34:15 +01:00
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if (add) {
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int fd;
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util_create_path(udev, filename);
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fd = open(filename, O_WRONLY|O_CREAT|O_CLOEXEC|O_TRUNC|O_NOFOLLOW, 0444);
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if (fd >= 0)
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close(fd);
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} else {
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unlink(filename);
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}
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2010-04-23 09:01:56 +02:00
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}
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2010-04-22 18:12:36 +02:00
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2010-04-23 09:01:56 +02:00
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int udev_device_tag_index(struct udev_device *dev, struct udev_device *dev_old, bool add)
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{
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2012-01-10 01:34:15 +01:00
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struct udev_list_entry *list_entry;
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bool found;
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if (add && dev_old != NULL) {
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/* delete possible left-over tags */
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udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(dev_old)) {
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const char *tag_old = udev_list_entry_get_name(list_entry);
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struct udev_list_entry *list_entry_current;
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found = false;
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udev_list_entry_foreach(list_entry_current, udev_device_get_tags_list_entry(dev)) {
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const char *tag = udev_list_entry_get_name(list_entry_current);
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2012-04-16 20:27:44 +02:00
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if (streq(tag, tag_old)) {
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2012-01-10 01:34:15 +01:00
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found = true;
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break;
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}
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}
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if (!found)
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udev_device_tag(dev_old, tag_old, false);
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}
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}
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udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(dev))
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udev_device_tag(dev, udev_list_entry_get_name(list_entry), add);
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return 0;
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2010-04-22 18:12:36 +02:00
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}
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2010-12-11 14:00:46 +01:00
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static bool device_has_info(struct udev_device *udev_device)
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{
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2012-01-10 01:34:15 +01:00
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struct udev_list_entry *list_entry;
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if (udev_device_get_devlinks_list_entry(udev_device) != NULL)
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return true;
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if (udev_device_get_devlink_priority(udev_device) != 0)
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return true;
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udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(udev_device))
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if (udev_list_entry_get_num(list_entry))
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return true;
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if (udev_device_get_tags_list_entry(udev_device) != NULL)
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return true;
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if (udev_device_get_watch_handle(udev_device) >= 0)
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return true;
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return false;
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2010-12-11 14:00:46 +01:00
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}
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2008-10-16 17:16:58 +02:00
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int udev_device_update_db(struct udev_device *udev_device)
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2003-10-18 08:32:17 +02:00
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{
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2012-01-10 01:34:15 +01:00
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bool has_info;
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const char *id;
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struct udev *udev = udev_device_get_udev(udev_device);
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char filename[UTIL_PATH_SIZE];
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char filename_tmp[UTIL_PATH_SIZE];
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FILE *f;
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id = udev_device_get_id_filename(udev_device);
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if (id == NULL)
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return -1;
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has_info = device_has_info(udev_device);
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2012-04-16 17:21:22 +02:00
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util_strscpyl(filename, sizeof(filename), TEST_PREFIX "/run/udev/data/", id, NULL);
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2012-01-10 01:34:15 +01:00
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/* do not store anything for otherwise empty devices */
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if (!has_info &&
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major(udev_device_get_devnum(udev_device)) == 0 &&
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udev_device_get_ifindex(udev_device) == 0) {
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unlink(filename);
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return 0;
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}
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/* write a database file */
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util_strscpyl(filename_tmp, sizeof(filename_tmp), filename, ".tmp", NULL);
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util_create_path(udev, filename_tmp);
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f = fopen(filename_tmp, "we");
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if (f == NULL) {
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err(udev, "unable to create temporary db file '%s': %m\n", filename_tmp);
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return -1;
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}
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/*
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* set 'sticky' bit to indicate that we should not clean the
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* database when we transition from initramfs to the real root
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*/
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if (udev_device_get_db_persist(udev_device))
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fchmod(fileno(f), 01644);
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if (has_info) {
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struct udev_list_entry *list_entry;
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if (major(udev_device_get_devnum(udev_device)) > 0) {
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udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(udev_device))
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2012-04-16 17:21:22 +02:00
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fprintf(f, "S:%s\n", udev_list_entry_get_name(list_entry) + strlen(TEST_PREFIX "/dev/"));
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2012-01-10 01:34:15 +01:00
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if (udev_device_get_devlink_priority(udev_device) != 0)
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fprintf(f, "L:%i\n", udev_device_get_devlink_priority(udev_device));
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if (udev_device_get_watch_handle(udev_device) >= 0)
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fprintf(f, "W:%i\n", udev_device_get_watch_handle(udev_device));
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}
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if (udev_device_get_usec_initialized(udev_device) > 0)
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fprintf(f, "I:%llu\n", udev_device_get_usec_initialized(udev_device));
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udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(udev_device)) {
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if (!udev_list_entry_get_num(list_entry))
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continue;
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fprintf(f, "E:%s=%s\n",
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udev_list_entry_get_name(list_entry),
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udev_list_entry_get_value(list_entry));
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}
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udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(udev_device))
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fprintf(f, "G:%s\n", udev_list_entry_get_name(list_entry));
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}
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fclose(f);
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rename(filename_tmp, filename);
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2012-04-08 16:06:20 +02:00
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dbg(udev, "created %s file '%s' for '%s'\n", has_info ? "db" : "empty",
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2012-01-10 01:34:15 +01:00
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filename, udev_device_get_devpath(udev_device));
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return 0;
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2003-10-18 08:32:17 +02:00
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}
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2008-10-16 17:16:58 +02:00
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int udev_device_delete_db(struct udev_device *udev_device)
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2003-08-06 08:57:23 +02:00
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{
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2012-01-10 01:34:15 +01:00
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const char *id;
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char filename[UTIL_PATH_SIZE];
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id = udev_device_get_id_filename(udev_device);
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if (id == NULL)
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return -1;
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2012-04-16 17:21:22 +02:00
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util_strscpyl(filename, sizeof(filename), TEST_PREFIX "/run/udev/data/", id, NULL);
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2012-01-10 01:34:15 +01:00
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unlink(filename);
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return 0;
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2003-08-06 08:57:23 +02:00
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}
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