udev_device.c revision 44aff4cd6d74d230e4a97f8d59f780472b7cad6e
/*
* Copyright (C) 2004-2006 Kay Sievers <kay.sievers@vrfy.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation version 2 of the License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <stddef.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <ctype.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <net/if.h>
#include <linux/sockios.h>
#include "udev.h"
#include "udev_rules.h"
struct udevice *udev_device_init(void)
{
struct udevice *udev;
udev = malloc(sizeof(struct udevice));
if (udev == NULL)
return NULL;
memset(udev, 0x00, sizeof(struct udevice));
INIT_LIST_HEAD(&udev->symlink_list);
INIT_LIST_HEAD(&udev->run_list);
INIT_LIST_HEAD(&udev->env_list);
/* set sysfs device to local storage, can be overridden if needed */
udev->dev = &udev->dev_local;
/* default node permissions */
udev->mode = 0660;
strcpy(udev->owner, "root");
strcpy(udev->group, "root");
udev->event_timeout = -1;
return udev;
}
void udev_device_cleanup(struct udevice *udev)
{
if (udev == NULL)
return;
name_list_cleanup(&udev->symlink_list);
name_list_cleanup(&udev->run_list);
name_list_cleanup(&udev->env_list);
free(udev);
}
dev_t udev_device_get_devt(struct udevice *udev)
{
const char *attr;
unsigned int maj, min;
/* read it from sysfs */
attr = sysfs_attr_get_value(udev->dev->devpath, "dev");
if (attr != NULL) {
if (sscanf(attr, "%u:%u", &maj, &min) == 2)
return makedev(maj, min);
}
return makedev(0, 0);
}