Struct mio_udev::Device [−][src]
pub struct Device { /* fields omitted */ }
A structure that provides access to sysfs/kernel devices.
Methods
impl Device
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impl Device
pub fn is_initialized(&self) -> bool
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pub fn is_initialized(&self) -> bool
Checks whether the device has already been handled by udev.
When a new device is connected to the system, udev initializes the device by setting
permissions, renaming network devices, and possibly other initialization routines. This
method returns true
if udev has performed all of its work to initialize this device.
This method only applies to devices with device nodes or network interfaces. All other
devices return true
by default.
pub fn devnum(&self) -> Option<u64>
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pub fn devnum(&self) -> Option<u64>
Gets the device's major/minor number.
pub fn syspath(&self) -> &Path
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pub fn syspath(&self) -> &Path
Returns the syspath of the device.
The path is an absolute path and includes the sys mount point. For example, the syspath for
tty0
could be /sys/devices/virtual/tty/tty0
, which includes the sys mount point,
/sys
.
pub fn devpath(&self) -> &OsStr
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pub fn devpath(&self) -> &OsStr
Returns the kernel devpath value of the device.
The path does not contain the sys mount point, but does start with a /
. For example, the
devpath for tty0
could be /devices/virtual/tty/tty0
.
pub fn devnode(&self) -> Option<&Path>
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pub fn devnode(&self) -> Option<&Path>
Returns the path to the device node belonging to the device.
The path is an absolute path and starts with the device directory. For example, the device
node for tty0
could be /dev/tty0
.
pub fn parent(&self) -> Option<Device>
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pub fn parent(&self) -> Option<Device>
Returns the parent of the device.
pub fn parent_with_subsystem(
&self,
subsystem: &Path
) -> Result<Option<Device>, Error>
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pub fn parent_with_subsystem(
&self,
subsystem: &Path
) -> Result<Option<Device>, Error>
Returns the parent of the device with the matching subsystem and devtype if any.
pub fn parent_with_subsystem_devtype(
&self,
subsystem: &Path,
devtype: &Path
) -> Result<Option<Device>, Error>
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pub fn parent_with_subsystem_devtype(
&self,
subsystem: &Path,
devtype: &Path
) -> Result<Option<Device>, Error>
Returns the parent of the device with the matching subsystem and devtype if any.
pub fn subsystem(&self) -> Option<&OsStr>
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pub fn subsystem(&self) -> Option<&OsStr>
Returns the subsystem name of the device.
The subsystem name is a string that indicates which kernel subsystem the device belongs to.
Examples of subsystem names are tty
, vtconsole
, block
, scsi
, and net
.
pub fn sysname(&self) -> &OsStr
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pub fn sysname(&self) -> &OsStr
Returns the kernel device name for the device.
The sysname is a string that differentiates the device from others in the same subsystem.
For example, tty0
is the sysname for a TTY device that differentiates it from others,
such as tty1
.
pub fn sysnum(&self) -> Option<usize>
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pub fn sysnum(&self) -> Option<usize>
Returns the instance number of the device.
The instance number is used to differentiate many devices of the same type. For example,
/dev/tty0
and /dev/tty1
are both TTY devices but have instance numbers of 0 and 1,
respectively.
Some devices don't have instance numbers, such as /dev/console
, in which case the method
returns None
.
pub fn devtype(&self) -> Option<&OsStr>
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pub fn devtype(&self) -> Option<&OsStr>
Returns the devtype name of the device.
pub fn driver(&self) -> Option<&OsStr>
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pub fn driver(&self) -> Option<&OsStr>
Returns the name of the kernel driver attached to the device.
pub fn property_value<T>(&self, property: T) -> Option<&OsStr> where
T: AsRef<OsStr>,
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pub fn property_value<T>(&self, property: T) -> Option<&OsStr> where
T: AsRef<OsStr>,
Retreives the value of a device property.
pub fn attribute_value<T>(&self, attribute: T) -> Option<&OsStr> where
T: AsRef<OsStr>,
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pub fn attribute_value<T>(&self, attribute: T) -> Option<&OsStr> where
T: AsRef<OsStr>,
Retreives the value of a device attribute.
pub fn set_attribute_value<T, U>(
&mut self,
attribute: T,
value: U
) -> Result<(), Error> where
T: AsRef<OsStr>,
U: AsRef<OsStr>,
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pub fn set_attribute_value<T, U>(
&mut self,
attribute: T,
value: U
) -> Result<(), Error> where
T: AsRef<OsStr>,
U: AsRef<OsStr>,
Sets the value of a device attribute.
ⓘImportant traits for Properties<'a>pub fn properties(&'a self) -> Properties<'a>
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pub fn properties(&'a self) -> Properties<'a>
Returns an iterator over the device's properties.
Example
This example prints out all of a device's properties:
for property in device.properties() { println!("{:?} = {:?}", property.name(), property.value()); }
ⓘImportant traits for Attributes<'a>pub fn attributes(&'a self) -> Attributes<'a>
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pub fn attributes(&'a self) -> Attributes<'a>
Returns an iterator over the device's attributes.
Example
This example prints out all of a device's attributes:
for attribute in device.attributes() { println!("{:?} = {:?}", attribute.name(), attribute.value()); }
Trait Implementations
impl AsRaw<udev_device> for Device
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impl AsRaw<udev_device> for Device
fn as_raw(&self) -> *mut udev_device
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fn as_raw(&self) -> *mut udev_device
Get a reference of the underlying struct. Read more
fn into_raw(self) -> *mut udev_device
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fn into_raw(self) -> *mut udev_device
Convert the object into the underlying pointer. Read more
impl Clone for Device
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impl Clone for Device
fn clone(&self) -> Device
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fn clone(&self) -> Device
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
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fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
impl FromRawWithContext<udev_device> for Device
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impl FromRawWithContext<udev_device> for Device
unsafe fn from_raw(context: &Context, ptr: *mut udev_device) -> Device
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unsafe fn from_raw(context: &Context, ptr: *mut udev_device) -> Device
Create an object from a given raw pointer and the matching context. Read more
impl Drop for Device
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impl Drop for Device