remove "want symlinks" text from udev-add.c
mention SYMLINK in man page
man page format cleanup
man page example for SYMLINK
static int get_major_minor(struct sysfs_class_device *class_dev, struct udevice *udev)
{
int retval = -ENODEV;
static int get_major_minor(struct sysfs_class_device *class_dev, struct udevice *udev)
{
int retval = -ENODEV;
char *dev;
dev = sysfs_get_value_from_attributes(class_dev->directory->attributes, "dev");
if (dev == NULL)
goto exit;
char *dev;
dev = sysfs_get_value_from_attributes(class_dev->directory->attributes, "dev");
if (dev == NULL)
goto exit;
dbg("dev='%s'", dev);
if (sscanf(dev, "%u:%u", &udev->major, &udev->minor) != 2)
goto exit;
dbg("dev='%s'", dev);
if (sscanf(dev, "%u:%u", &udev->major, &udev->minor) != 2)
goto exit;
dbg("found major=%d, minor=%d", udev->major, udev->minor);
retval = 0;
dbg("found major=%d, minor=%d", udev->major, udev->minor);
retval = 0;
-/*
- * we possibly want to add some symlinks here
- * only numeric owner/group id's are supported
- */
static int create_node(struct udevice *dev)
{
char filename[255];
static int create_node(struct udevice *dev)
{
char filename[255];
strncpy(filename, udev_root, sizeof(filename));
strncat(filename, dev->name, sizeof(filename));
strncpy(filename, udev_root, sizeof(filename));
strncat(filename, dev->name, sizeof(filename));
strcpy(dev_path, sysfs_path);
strcat(dev_path, device_name);
strcpy(dev_path, sysfs_path);
strcat(dev_path, device_name);
dbg("looking at '%s'", dev_path);
/* open up the sysfs class device for this thing... */
dbg("looking at '%s'", dev_path);
/* open up the sysfs class device for this thing... */
-A sample \fIudev.conf\fP might look like this:
+.RI "A sample " udev.conf " might look like this:
.sp
.nf
# udev_root - where in the filesystem to place the device nodes
.sp
.nf
# udev_root - where in the filesystem to place the device nodes
.P
The rules for udev to use when naming devices may specified at
.I /etc/udev/udev.rules
.P
The rules for udev to use when naming devices may specified at
.I /etc/udev/udev.rules
.I udev_rules
value in the
.I /etc/udev/udev.conf
.I udev_rules
value in the
.I /etc/udev/udev.conf
Every line in the rules file define the mapping between device attributes and
the device file name. It starts with a keyword defining the method used to
match, followed by one ore more keys to compare and the filename for the
Every line in the rules file define the mapping between device attributes and
the device file name. It starts with a keyword defining the method used to
match, followed by one ore more keys to compare and the filename for the
-device. If no matching configuration is found, the default kernel device name
+device. Optional the name for a symlink targeting the node may specified.
+.br
+If no matching configuration is found, the default kernel device name
is used.
.P
The line format is:
.sp
is used.
.P
The line format is:
.sp
-.I method, key,[key,...] name
+.I method, key,[key,...] name [, symlink]
.sp
where valid methods with corresponding keys are:
.TP
.B CALLOUT
calling external program, that returns a string to match
.br
.sp
where valid methods with corresponding keys are:
.TP
.B CALLOUT
calling external program, that returns a string to match
.br
-keys: \fBBUS\fP, \fBPROGRAM\fP, \fBID\fP
+.RB "keys: " BUS ", " PROGRAM ", " ID
.TP
.B LABEL
device label or serial number, like USB serial number, SCSI UUID or
file system label
.br
.TP
.B LABEL
device label or serial number, like USB serial number, SCSI UUID or
file system label
.br
-keys: \fBBUS\fP, \fIsysfs_attribute\fP
+.RB "keys: " BUS ", "
+.I sysfs_attribute
.TP
.B NUMBER
device number on the bus, like PCI bus id
.br
.TP
.B NUMBER
device number on the bus, like PCI bus id
.br
-keys: \fBBUS\fP, \fBID\fP
+.RB "keys: " BUS ", " ID
.TP
.B TOPOLOGY
device position on bus, like physical port of USB device
.br
.TP
.B TOPOLOGY
device position on bus, like physical port of USB device
.br
-keys: \fBBUS\fP, \fBPLACE\fP
+.RB "keys: " BUS ", " PLACE
.TP
.B REPLACE
string replacement of the kernel device name
.br
.TP
.B REPLACE
string replacement of the kernel device name
.br
.P
The methods are applied in the following order:
.P
The methods are applied in the following order:
-.BR CALLOUT ", " LABEL ", " NUMBER ", " TOPOLOGY ", " REPLACE "."
+.BR CALLOUT ", " LABEL ", " NUMBER ", " TOPOLOGY ", " REPLACE "."
-The
-.B NAME
-and
-.B PROGRAM
+.RB "The " NAME " ," SYMLINK " and " PROGRAM
fields support simple printf-like string substitution:
.TP
.B %n
fields support simple printf-like string substitution:
.TP
.B %n
-the "kernel number" of the device
+The "kernel number" of the device.
for example, 'sda3' has a "kernel number" of '3'
.TP
.B %M
for example, 'sda3' has a "kernel number" of '3'
.TP
.B %M
-the kernel major number for the device
+The kernel major number for the device.
-the kernel minor number for the device
+The kernel minor number for the device.
-the bus id for the device
+The bus id for the device.
-the CALLOUT program returned string
-(this does not work within the PROGRAM field for the obvious reason.)
+The CALLOUT program returned string.
+(This does not work within the PROGRAM field for the obvious reason.)
.TP
.B %D
Use the devfs style disk name for this device.
For partitions, this will result in 'part%n'
.TP
.B %D
Use the devfs style disk name for this device.
For partitions, this will result in 'part%n'
-If this is not a partition, it will result in 'disk'
+If this is not a partition, it will result in 'disk'.
-A sample \fIudev.rules\fP might look like this:
+.RI "A sample " udev.rules " might look like this:"
.sp
.nf
# if /sbin/scsi_id returns "OEM 0815" device will be called disk1
.sp
.nf
# if /sbin/scsi_id returns "OEM 0815" device will be called disk1
# ttyUSB1 should always be called pda
REPLACE, KERNEL="ttyUSB1", NAME="pda"
# ttyUSB1 should always be called pda
REPLACE, KERNEL="ttyUSB1", NAME="pda"
-# USB webcams to be called webcam0, webcam1, ...
-LABEL, BUS="usb", model="WebCam Version 3", NAME="webcam%n"
+# USB webcams with symlinks to be called webcam0, webcam1, ...
+LABEL, BUS="usb", model="WebCam Version 3", NAME="video%n", SYMLINK="webcam%n"
.fi
.P
Permissions and ownership for the created device files may specified at
.I /etc/udev/udev.permissions
.fi
.P
Permissions and ownership for the created device files may specified at
.I /etc/udev/udev.permissions
.I /etc/udev/udev.conf
file.
.br
.I /etc/udev/udev.conf
file.
.br
If
.B udev
was built using klibc or is used before the user database is accessible (e.g.
If
.B udev
was built using klibc or is used before the user database is accessible (e.g.
-.B initrd
-), only numeric owner and group values may be used.
+.BR initrd "(4)), only numeric owner and group values may be used."
-A sample \fIudev.permissions\fP might look like this:
+.RI "A sample " udev.permissions " might look like this:"
.sp
.nf
#name:user:group:mode
.sp
.nf
#name:user:group:mode
following the '[' is a '!' then any character not enclosed is matched.
.SH "FILES"
.nf
following the '[' is a '!' then any character not enclosed is matched.
.SH "FILES"
.nf
/sbin/udev udev program
/etc/udev/* udev config files
/etc/hotplug.d/default/udev.hotplug hotplug symlink to udev program
/sbin/udev udev program
/etc/udev/* udev config files
/etc/hotplug.d/default/udev.hotplug hotplug symlink to udev program