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mirror of https://github.com/systemd/systemd-stable.git synced 2024-10-31 16:21:11 +03:00
systemd-stable/udevd.h
kay.sievers@vrfy.org 872344c410 [PATCH] udevd - switch socket path to abstract namespace
As Chris Friesen <chris_friesen@sympatico.ca> suggested, here we switch
the unix domains socket path to abstract namespace and get rid of the
socket file in the filesystem.

Hey, this was new to me today. So here a few words:
  Linux supports a abstract namespace for sockets. We don't need a
  physical file on the filesystem but only a unique string magically
  starting with the '\0' character.

  strace with real file:
    connect(3, {sa_family=AF_UNIX, path="/udev/.udevd.sock"}, 110)

  strace with abstract namespace:
    connect(3, {sa_family=AF_UNIX, path=@udevd}, 110)
2005-04-26 21:32:25 -07:00

42 lines
1.1 KiB
C

/*
* udevd.h
*
* Userspace devfs
*
* Copyright (C) 2004 Ling, Xiaofeng <xiaofeng.ling@intel.com>
* Copyright (C) 2004 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.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include "list.h"
#define UDEV_MAGIC "udevd_" UDEV_VERSION
#define EVENT_TIMEOUT_SEC 5
#define UDEVSEND_CONNECT_RETRY 20 /* x 100 millisec */
#define UDEVD_SOCK_PATH "udevd"
struct hotplug_msg {
char magic[20];
struct list_head list;
pid_t pid;
int seqnum;
time_t queue_time;
char action[8];
char devpath[128];
char subsystem[16];
};