[thirdparty/systemd.git] / README


udev - a userspace implementation of devfs

For more information on the design, and structure of this project, see the
files in the docs/ directory.

To use:

- Edit the udev.h file and replace the following variables with values
  that make sense for your system:
	#define SYSFS_ROOT      "/sys"
	#define UDEV_ROOT       "/home/greg/linux/udev/"
	#define DEV_FILE        "/dev"
	#define MKNOD           "/bin/mknod"
  The only value most people will have to change is the UDEV_ROOT
  variable, as I doubt you really want device nodes to be created in my
  home directory :)

- Run make to build the project.

- Make sure sysfs is mounted.

- Point /proc/sys/kernel/hotplug at the location of the udev binary that
  is created.  Then plug some block devices in, or other types of
  devices that create dev files in sysfs.  An easy way to do this,
  without any hardware is to use the scsi_debug module to create virtual
  scsi devices.

- Watch as the nodes get created and removed.


Yes this is a really rough first cut, I know.  It's mostly a proof of
concept that this can actually work.  See the TODO file for a list of
things left to be done.

Any comment/questions/concerns please let me know.

greg k-h
greg@kroah.com
Commit	Line	Data
d2ce1817 GKH	1
	2	udev - a userspace implementation of devfs
	3
	4	For more information on the design, and structure of this project, see the
	5	files in the docs/ directory.
	6
	7	To use:
	8
	9	- Edit the udev.h file and replace the following variables with values
	10	that make sense for your system:
	11	#define SYSFS_ROOT "/sys"
	12	#define UDEV_ROOT "/home/greg/linux/udev/"
	13	#define DEV_FILE "/dev"
	14	#define MKNOD "/bin/mknod"
	15	The only value most people will have to change is the UDEV_ROOT
	16	variable, as I doubt you really want device nodes to be created in my
	17	home directory :)
	18
	19	- Run make to build the project.
	20
	21	- Make sure sysfs is mounted.
	22
	23	- Point /proc/sys/kernel/hotplug at the location of the udev binary that
	24	is created. Then plug some block devices in, or other types of
	25	devices that create dev files in sysfs. An easy way to do this,
	26	without any hardware is to use the scsi_debug module to create virtual
	27	scsi devices.
	28
	29	- Watch as the nodes get created and removed.
	30
	31
	32	Yes this is a really rough first cut, I know. It's mostly a proof of
	33	concept that this can actually work. See the TODO file for a list of
	34	things left to be done.
	35
	36	Any comment/questions/concerns please let me know.
	37
	38	greg k-h
	39	greg@kroah.com