pub struct OpenOptions { /* private fields */ }
Expand description
Options and flags which can be used to configure how a FIFO file is opened.
This builder allows configuring how to create a pipe end from a FIFO file.
Generally speaking, when using OpenOptions
, you’ll first call new
,
then chain calls to methods to set each option, then call either
open_receiver
or open_sender
, passing the path of the FIFO file you
are trying to open. This will give you a io::Result
with a pipe
end inside that you can further operate on.
Examples
Opening a pair of pipe ends from a FIFO file:
use tokio::net::unix::pipe;
const FIFO_NAME: &str = "path/to/a/fifo";
let rx = pipe::OpenOptions::new().open_receiver(FIFO_NAME)?;
let tx = pipe::OpenOptions::new().open_sender(FIFO_NAME)?;
Opening a Sender
on Linux when you are sure the file is a FIFO:
use tokio::net::unix::pipe;
use nix::{unistd::mkfifo, sys::stat::Mode};
// Our program has exclusive access to this path.
const FIFO_NAME: &str = "path/to/a/new/fifo";
mkfifo(FIFO_NAME, Mode::S_IRWXU)?;
let tx = pipe::OpenOptions::new()
.read_write(true)
.unchecked(true)
.open_sender(FIFO_NAME)?;
Implementations§
source§impl OpenOptions
impl OpenOptions
sourcepub fn new() -> OpenOptions
pub fn new() -> OpenOptions
Creates a blank new set of options ready for configuration.
All options are initially set to false
.
sourcepub fn read_write(&mut self, value: bool) -> &mut Self
pub fn read_write(&mut self, value: bool) -> &mut Self
Sets the option for read-write access.
This option, when true, will indicate that a FIFO file will be opened in read-write access mode. This operation is not defined by the POSIX standard and is only guaranteed to work on Linux.
Examples
Opening a Sender
even if there are no open reading ends:
use tokio::net::unix::pipe;
let tx = pipe::OpenOptions::new()
.read_write(true)
.open_sender("path/to/a/fifo");
Opening a resilient Receiver
i.e. a reading pipe end which will not
fail with UnexpectedEof
during reading if all writing ends of the
pipe close the FIFO file.
use tokio::net::unix::pipe;
let tx = pipe::OpenOptions::new()
.read_write(true)
.open_receiver("path/to/a/fifo");
sourcepub fn unchecked(&mut self, value: bool) -> &mut Self
pub fn unchecked(&mut self, value: bool) -> &mut Self
Sets the option to skip the check for FIFO file type.
By default, open_receiver
and open_sender
functions will check
if the opened file is a FIFO file. Set this option to true
if you are
sure the file is a FIFO file.
Examples
use tokio::net::unix::pipe;
use nix::{unistd::mkfifo, sys::stat::Mode};
// Our program has exclusive access to this path.
const FIFO_NAME: &str = "path/to/a/new/fifo";
mkfifo(FIFO_NAME, Mode::S_IRWXU)?;
let rx = pipe::OpenOptions::new()
.unchecked(true)
.open_receiver(FIFO_NAME)?;
sourcepub fn open_receiver<P: AsRef<Path>>(&self, path: P) -> Result<Receiver>
pub fn open_receiver<P: AsRef<Path>>(&self, path: P) -> Result<Receiver>
Creates a Receiver
from a FIFO file with the options specified by self
.
This function will open the FIFO file at the specified path, possibly check if it is a pipe, and associate the pipe with the default event loop for reading.
Errors
If the file type check fails, this function will fail with io::ErrorKind::InvalidInput
.
This function may also fail with other standard OS errors.
Panics
This function panics if it is not called from within a runtime with IO enabled.
The runtime is usually set implicitly when this function is called
from a future driven by a tokio runtime, otherwise runtime can be set
explicitly with Runtime::enter
function.
sourcepub fn open_sender<P: AsRef<Path>>(&self, path: P) -> Result<Sender>
pub fn open_sender<P: AsRef<Path>>(&self, path: P) -> Result<Sender>
Creates a Sender
from a FIFO file with the options specified by self
.
This function will open the FIFO file at the specified path, possibly check if it is a pipe, and associate the pipe with the default event loop for writing.
Errors
If the file type check fails, this function will fail with io::ErrorKind::InvalidInput
.
If the file is not opened in read-write access mode and the file is not
currently open for reading, this function will fail with ENXIO
.
This function may also fail with other standard OS errors.
Panics
This function panics if it is not called from within a runtime with IO enabled.
The runtime is usually set implicitly when this function is called
from a future driven by a tokio runtime, otherwise runtime can be set
explicitly with Runtime::enter
function.
Trait Implementations§
source§impl Clone for OpenOptions
impl Clone for OpenOptions
source§fn clone(&self) -> OpenOptions
fn clone(&self) -> OpenOptions
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read more