Struct io_streams::BufDuplexer
source · [−]pub struct BufDuplexer<Inner: HalfDuplex> { /* private fields */ }
Expand description
Wraps a reader and writer and buffers their output.
It can be excessively inefficient to work directly with something that
implements Write
. For example, every call to
write
on TcpStream
results in a system call. A
BufDuplexer<Inner>
keeps an in-memory buffer of data and writes it to an
underlying writer in large, infrequent batches.
It can be excessively inefficient to work directly with a Read
instance. For example, every call to read
on
TcpStream
results in a system call. A BufDuplexer<Inner>
performs
large, infrequent reads on the underlying Read
and maintains an
in-memory buffer of the results.
BufDuplexer<Inner>
can improve the speed of programs that make small
and repeated write calls to the same file or network socket. It does not
help when writing very large amounts at once, or writing just one or a few
times. It also provides no advantage when writing to a destination that is
in memory, like a Vec
<u8>
.
BufDuplexer<Inner>
can improve the speed of programs that make small
and repeated read calls to the same file or network socket. It does not
help when reading very large amounts at once, or reading just one or a few
times. It also provides no advantage when reading from a source that is
already in memory, like a Vec
<u8>
.
It is critical to call flush
before BufDuplexer<Inner>
is dropped.
Though dropping will attempt to flush the contents of the writer buffer,
any errors that happen in the process of dropping will be ignored. Calling
flush
ensures that the writer buffer is empty and thus dropping will
not even attempt file operations.
When the BufDuplexer<Inner>
is dropped, the contents of its reader buffer
will be discarded. Creating multiple instances of a BufDuplexer<Inner>
on
the same stream can cause data loss. Reading from the underlying reader
after unwrapping the BufDuplexer<Inner>
with BufDuplexer::into_inner
can also cause data loss.
Examples
Let’s write the numbers one through ten to a TcpStream
:
use std::io::prelude::*;
use std::net::TcpStream;
let mut stream = TcpStream::connect("127.0.0.1:34254").unwrap();
for i in 0..10 {
stream.write(&[i + 1]).unwrap();
}
Because we’re not buffering, we write each one in turn, incurring the
overhead of a system call per byte written. We can fix this with a
BufDuplexer<Inner>
:
use io_streams::BufDuplexer;
use std::io::prelude::*;
use std::net::TcpStream;
let mut stream = BufDuplexer::new(TcpStream::connect("127.0.0.1:34254").unwrap());
for i in 0..10 {
stream.write(&[i + 1]).unwrap();
}
stream.flush().unwrap();
By wrapping the stream with a BufDuplexer<Inner>
, these ten writes are
all grouped together by the buffer and will all be written out in one
system call when the stream
is flushed.
use io_streams::BufDuplexer;
use std::io::prelude::*;
use std::net::TcpStream;
fn main() -> std::io::Result<()> {
let mut stream = BufDuplexer::new(TcpStream::connect("127.0.0.1:34254").unwrap());
let mut line = String::new();
let len = stream.read_line(&mut line)?;
println!("First line is {} bytes long", len);
Ok(())
}
Implementations
sourceimpl<Inner: HalfDuplex> BufDuplexer<Inner>
impl<Inner: HalfDuplex> BufDuplexer<Inner>
sourcepub fn new(inner: Inner) -> Self
pub fn new(inner: Inner) -> Self
Creates a new BufDuplexer<Inner>
with default buffer capacities. The
default is currently 8 KB, but may change in the future.
Examples
use io_streams::BufDuplexer;
use std::net::TcpStream;
let mut buffer = BufDuplexer::new(TcpStream::connect("127.0.0.1:34254").unwrap());
sourcepub fn with_capacities(
reader_capacity: usize,
writer_capacity: usize,
inner: Inner
) -> Self
pub fn with_capacities(
reader_capacity: usize,
writer_capacity: usize,
inner: Inner
) -> Self
Creates a new BufDuplexer<Inner>
with the specified buffer
capacities.
Examples
Creating a buffer with ten bytes of reader capacity and a writer buffer of a hundered bytes:
use io_streams::BufDuplexer;
use std::net::TcpStream;
let stream = TcpStream::connect("127.0.0.1:34254").unwrap();
let mut buffer = BufDuplexer::with_capacities(10, 100, stream);
sourcepub fn get_ref(&self) -> &Inner
pub fn get_ref(&self) -> &Inner
Gets a reference to the underlying reader/writer.
Examples
use io_streams::BufDuplexer;
use std::net::TcpStream;
let mut buffer = BufDuplexer::new(TcpStream::connect("127.0.0.1:34254").unwrap());
// we can use reference just like buffer
let reference = buffer.get_ref();
sourcepub fn get_mut(&mut self) -> &mut Inner
pub fn get_mut(&mut self) -> &mut Inner
Gets a mutable reference to the underlying reader/writer.
It is inadvisable to directly write to the underlying reader/writer.
Examples
use io_streams::BufDuplexer;
use std::net::TcpStream;
let mut buffer = BufDuplexer::new(TcpStream::connect("127.0.0.1:34254").unwrap());
// we can use reference just like buffer
let reference = buffer.get_mut();
sourcepub fn writer_buffer(&self) -> &[u8]ⓘNotable traits for &[u8]impl<'_> Read for &[u8]impl<'_> Write for &mut [u8]
pub fn writer_buffer(&self) -> &[u8]ⓘNotable traits for &[u8]impl<'_> Read for &[u8]impl<'_> Write for &mut [u8]
Returns a reference to the internally buffered writer data.
Examples
use io_streams::BufDuplexer;
use std::net::TcpStream;
let buf_writer = BufDuplexer::new(TcpStream::connect("127.0.0.1:34254").unwrap());
// See how many bytes are currently buffered
let bytes_buffered = buf_writer.writer_buffer().len();
sourcepub fn reader_buffer(&self) -> &[u8]ⓘNotable traits for &[u8]impl<'_> Read for &[u8]impl<'_> Write for &mut [u8]
pub fn reader_buffer(&self) -> &[u8]ⓘNotable traits for &[u8]impl<'_> Read for &[u8]impl<'_> Write for &mut [u8]
Returns a reference to the internally buffered reader data.
Unlike fill_buf
, this will not attempt to fill the buffer if it is
empty.
Examples
use char_device::CharDevice;
use io_streams::BufDuplexer;
use std::fs::File;
use std::io::BufRead;
fn main() -> std::io::Result<()> {
let f = CharDevice::new(File::open("/dev/ttyS0")?)?;
let mut reader = BufDuplexer::new(f);
assert!(reader.reader_buffer().is_empty());
if reader.fill_buf()?.len() > 0 {
assert!(!reader.reader_buffer().is_empty());
}
Ok(())
}
sourcepub fn writer_capacity(&self) -> usize
pub fn writer_capacity(&self) -> usize
Returns the number of bytes the internal writer buffer can hold without flushing.
Examples
use io_streams::BufDuplexer;
use std::net::TcpStream;
let buf_duplexer = BufDuplexer::new(TcpStream::connect("127.0.0.1:34254").unwrap());
// Check the capacity of the inner buffer
let capacity = buf_duplexer.writer_capacity();
// Calculate how many bytes can be written without flushing
let without_flush = capacity - buf_duplexer.writer_buffer().len();
sourcepub fn reader_capacity(&self) -> usize
pub fn reader_capacity(&self) -> usize
Returns the number of bytes the internal reader buffer can hold at once.
Examples
use char_device::CharDevice;
use io_streams::BufDuplexer;
use std::fs::File;
use std::io::BufRead;
fn main() -> std::io::Result<()> {
let f = CharDevice::new(File::open("/dev/tty")?)?;
let mut reader = BufDuplexer::new(f);
let capacity = reader.reader_capacity();
let buffer = reader.fill_buf()?;
assert!(buffer.len() <= capacity);
Ok(())
}
sourcepub fn into_inner(self) -> Result<Inner, IntoInnerError<Self>>
pub fn into_inner(self) -> Result<Inner, IntoInnerError<Self>>
Unwraps this BufDuplexer<Inner>
, returning the underlying
reader/writer.
The buffer is written out before returning the reader/writer.
Errors
An Err
will be returned if an error occurs while flushing the
buffer.
Examples
use io_streams::BufDuplexer;
use std::net::TcpStream;
let mut buffer = BufDuplexer::new(TcpStream::connect("127.0.0.1:34254").unwrap());
// unwrap the TcpStream and flush the buffer
let stream = buffer.into_inner().unwrap();
Trait Implementations
sourceimpl<Inner: HalfDuplex + AsFd> AsFd for BufDuplexer<Inner>
impl<Inner: HalfDuplex + AsFd> AsFd for BufDuplexer<Inner>
sourcefn as_fd(&self) -> BorrowedFd<'_>
fn as_fd(&self) -> BorrowedFd<'_>
Borrows the file descriptor. Read more
sourceimpl<Inner: HalfDuplex + AsRawFd> AsRawFd for BufDuplexer<Inner>
impl<Inner: HalfDuplex + AsRawFd> AsRawFd for BufDuplexer<Inner>
sourceimpl<Inner: HalfDuplex> BufRead for BufDuplexer<Inner>
impl<Inner: HalfDuplex> BufRead for BufDuplexer<Inner>
sourcefn fill_buf(&mut self) -> Result<&[u8]>
fn fill_buf(&mut self) -> Result<&[u8]>
Returns the contents of the internal buffer, filling it with more data from the inner reader if it is empty. Read more
sourcefn consume(&mut self, amt: usize)
fn consume(&mut self, amt: usize)
Tells this buffer that amt
bytes have been consumed from the buffer,
so they should no longer be returned in calls to read
. Read more
sourcefn read_until(&mut self, byte: u8, buf: &mut Vec<u8>) -> Result<usize>
fn read_until(&mut self, byte: u8, buf: &mut Vec<u8>) -> Result<usize>
Read all bytes into buf
until the delimiter byte
or EOF is reached. Read more
sourcefn read_line(&mut self, buf: &mut String) -> Result<usize>
fn read_line(&mut self, buf: &mut String) -> Result<usize>
Read all bytes until a newline (the 0xA
byte) is reached, and append
them to the provided buffer. You do not need to clear the buffer before
appending. Read more
sourcefn has_data_left(&mut self) -> Result<bool, Error>
fn has_data_left(&mut self) -> Result<bool, Error>
buf_read_has_data_left
)Check if the underlying Read
has any data left to be read. Read more
sourceimpl<Inner: HalfDuplex> Debug for BufDuplexer<Inner> where
Inner: Debug,
impl<Inner: HalfDuplex> Debug for BufDuplexer<Inner> where
Inner: Debug,
sourceimpl<Inner: HalfDuplex> Read for BufDuplexer<Inner>
impl<Inner: HalfDuplex> Read for BufDuplexer<Inner>
sourcefn read(&mut self, buf: &mut [u8]) -> Result<usize>
fn read(&mut self, buf: &mut [u8]) -> Result<usize>
Pull some bytes from this source into the specified buffer, returning how many bytes were read. Read more
sourcefn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize>
fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize>
Like read
, except that it reads into a slice of buffers. Read more
sourcefn is_read_vectored(&self) -> bool
fn is_read_vectored(&self) -> bool
can_vector
)Determines if this Read
er has an efficient read_vectored
implementation. Read more
1.0.0 · sourcefn read_to_end(&mut self, buf: &mut Vec<u8, Global>) -> Result<usize, Error>
fn read_to_end(&mut self, buf: &mut Vec<u8, Global>) -> Result<usize, Error>
Read all bytes until EOF in this source, placing them into buf
. Read more
1.0.0 · sourcefn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>
fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>
Read all bytes until EOF in this source, appending them to buf
. Read more
1.6.0 · sourcefn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>
fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>
Read the exact number of bytes required to fill buf
. Read more
sourcefn read_buf(&mut self, buf: &mut ReadBuf<'_>) -> Result<(), Error>
fn read_buf(&mut self, buf: &mut ReadBuf<'_>) -> Result<(), Error>
read_buf
)Pull some bytes from this source into the specified buffer. Read more
sourcefn read_buf_exact(&mut self, buf: &mut ReadBuf<'_>) -> Result<(), Error>
fn read_buf_exact(&mut self, buf: &mut ReadBuf<'_>) -> Result<(), Error>
read_buf
)Read the exact number of bytes required to fill buf
. Read more
1.0.0 · sourcefn by_ref(&mut self) -> &mut Self
fn by_ref(&mut self) -> &mut Self
Creates a “by reference” adaptor for this instance of Read
. Read more
sourceimpl<Inner: HalfDuplex> Write for BufDuplexer<Inner>
impl<Inner: HalfDuplex> Write for BufDuplexer<Inner>
sourcefn write(&mut self, buf: &[u8]) -> Result<usize>
fn write(&mut self, buf: &[u8]) -> Result<usize>
Write a buffer into this writer, returning how many bytes were written. Read more
sourcefn write_all(&mut self, buf: &[u8]) -> Result<()>
fn write_all(&mut self, buf: &[u8]) -> Result<()>
Attempts to write an entire buffer into this writer. Read more
sourcefn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize>
fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize>
sourcefn is_write_vectored(&self) -> bool
fn is_write_vectored(&self) -> bool
can_vector
)Determines if this Write
r has an efficient write_vectored
implementation. Read more
sourcefn flush(&mut self) -> Result<()>
fn flush(&mut self) -> Result<()>
Flush this output stream, ensuring that all intermediately buffered contents reach their destination. Read more
sourcefn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>
fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>
write_all_vectored
)Attempts to write multiple buffers into this writer. Read more
Auto Trait Implementations
impl<Inner> RefUnwindSafe for BufDuplexer<Inner> where
Inner: RefUnwindSafe,
impl<Inner> Send for BufDuplexer<Inner> where
Inner: Send,
impl<Inner> Sync for BufDuplexer<Inner> where
Inner: Sync,
impl<Inner> Unpin for BufDuplexer<Inner> where
Inner: Unpin,
impl<Inner> UnwindSafe for BufDuplexer<Inner> where
Inner: UnwindSafe,
Blanket Implementations
sourceimpl<T> AsFilelike for T where
T: AsFd,
impl<T> AsFilelike for T where
T: AsFd,
sourcefn as_filelike(&self) -> BorrowedFd<'_>
fn as_filelike(&self) -> BorrowedFd<'_>
Borrows the reference. Read more
sourcefn as_filelike_view<Target>(&self) -> FilelikeView<'_, Target> where
Target: FilelikeViewType,
fn as_filelike_view<Target>(&self) -> FilelikeView<'_, Target> where
Target: FilelikeViewType,
Return a borrowing view of a resource which dereferences to a &Target
. Read more
sourceimpl<T> AsGrip for T where
T: AsFd,
impl<T> AsGrip for T where
T: AsFd,
sourcefn as_grip(&self) -> BorrowedFd<'_>
fn as_grip(&self) -> BorrowedFd<'_>
Extracts the grip.
sourceimpl<T> AsRawFilelike for T where
T: AsRawFd,
impl<T> AsRawFilelike for T where
T: AsRawFd,
sourcefn as_raw_filelike(&self) -> i32
fn as_raw_filelike(&self) -> i32
Returns the raw value.
sourceimpl<T> AsRawGrip for T where
T: AsRawFd,
impl<T> AsRawGrip for T where
T: AsRawFd,
sourcefn as_raw_grip(&self) -> i32
fn as_raw_grip(&self) -> i32
Extracts the raw grip.
sourceimpl<T> AsRawSocketlike for T where
T: AsRawFd,
impl<T> AsRawSocketlike for T where
T: AsRawFd,
sourcefn as_raw_socketlike(&self) -> i32
fn as_raw_socketlike(&self) -> i32
Returns the raw value.
sourceimpl<T> AsSocketlike for T where
T: AsFd,
impl<T> AsSocketlike for T where
T: AsFd,
sourcefn as_socketlike(&self) -> BorrowedFd<'_>
fn as_socketlike(&self) -> BorrowedFd<'_>
Borrows the reference.
sourcefn as_socketlike_view<Target>(&self) -> SocketlikeView<'_, Target> where
Target: SocketlikeViewType,
fn as_socketlike_view<Target>(&self) -> SocketlikeView<'_, Target> where
Target: SocketlikeViewType,
Return a borrowing view of a resource which dereferences to a &Target
. Read more
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<T> FileIoExt for T where
T: AsFilelike,
impl<T> FileIoExt for T where
T: AsFilelike,
sourcefn advise(&self, offset: u64, len: u64, advice: Advice) -> Result<(), Error>
fn advise(&self, offset: u64, len: u64, advice: Advice) -> Result<(), Error>
Announce the expected access pattern of the data at the given offset.
sourcefn allocate(&self, offset: u64, len: u64) -> Result<(), Error>
fn allocate(&self, offset: u64, len: u64) -> Result<(), Error>
Allocate space in the file, increasing the file size as needed, and ensuring that there are no holes under the given range. Read more
sourcefn read(&self, buf: &mut [u8]) -> Result<usize, Error>
fn read(&self, buf: &mut [u8]) -> Result<usize, Error>
Pull some bytes from this source into the specified buffer, returning how many bytes were read. Read more
sourcefn read_exact(&self, buf: &mut [u8]) -> Result<(), Error>
fn read_exact(&self, buf: &mut [u8]) -> Result<(), Error>
Read the exact number of bytes required to fill buf
. Read more
sourcefn read_at(&self, buf: &mut [u8], offset: u64) -> Result<usize, Error>
fn read_at(&self, buf: &mut [u8], offset: u64) -> Result<usize, Error>
Reads a number of bytes starting from a given offset. Read more
sourcefn read_exact_at(&self, buf: &mut [u8], offset: u64) -> Result<(), Error>
fn read_exact_at(&self, buf: &mut [u8], offset: u64) -> Result<(), Error>
Reads the exact number of byte required to fill buf from the given offset. Read more
sourcefn read_vectored(&self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize, Error>
fn read_vectored(&self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize, Error>
Like read
, except that it reads into a slice of buffers. Read more
sourcefn read_vectored_at(
&self,
bufs: &mut [IoSliceMut<'_>],
offset: u64
) -> Result<usize, Error>
fn read_vectored_at(
&self,
bufs: &mut [IoSliceMut<'_>],
offset: u64
) -> Result<usize, Error>
Is to read_vectored
what read_at
is to read
.
sourcefn is_read_vectored_at(&self) -> bool
fn is_read_vectored_at(&self) -> bool
Determines if this Read
er has an efficient read_vectored_at
implementation. Read more
sourcefn read_to_end(&self, buf: &mut Vec<u8, Global>) -> Result<usize, Error>
fn read_to_end(&self, buf: &mut Vec<u8, Global>) -> Result<usize, Error>
Read all bytes until EOF in this source, placing them into buf
. Read more
sourcefn read_to_end_at(
&self,
buf: &mut Vec<u8, Global>,
offset: u64
) -> Result<usize, Error>
fn read_to_end_at(
&self,
buf: &mut Vec<u8, Global>,
offset: u64
) -> Result<usize, Error>
Read all bytes, starting at offset
, until EOF in this source, placing
them into buf
. Read more
sourcefn read_to_string(&self, buf: &mut String) -> Result<usize, Error>
fn read_to_string(&self, buf: &mut String) -> Result<usize, Error>
Read all bytes until EOF in this source, appending them to buf
. Read more
sourcefn read_to_string_at(
&self,
buf: &mut String,
offset: u64
) -> Result<usize, Error>
fn read_to_string_at(
&self,
buf: &mut String,
offset: u64
) -> Result<usize, Error>
Read all bytes, starting at offset
, until EOF in this source,
appending them to buf
. Read more
sourcefn peek(&self, buf: &mut [u8]) -> Result<usize, Error>
fn peek(&self, buf: &mut [u8]) -> Result<usize, Error>
Read bytes from the current position without advancing the current position. Read more
sourcefn write(&self, buf: &[u8]) -> Result<usize, Error>
fn write(&self, buf: &[u8]) -> Result<usize, Error>
Write a buffer into this writer, returning how many bytes were written. Read more
sourcefn write_all(&self, buf: &[u8]) -> Result<(), Error>
fn write_all(&self, buf: &[u8]) -> Result<(), Error>
Attempts to write an entire buffer into this writer. Read more
sourcefn write_at(&self, buf: &[u8], offset: u64) -> Result<usize, Error>
fn write_at(&self, buf: &[u8], offset: u64) -> Result<usize, Error>
Writes a number of bytes starting from a given offset. Read more
sourcefn write_all_at(&self, buf: &[u8], offset: u64) -> Result<(), Error>
fn write_all_at(&self, buf: &[u8], offset: u64) -> Result<(), Error>
Attempts to write an entire buffer starting from a given offset. Read more
sourcefn write_vectored(&self, bufs: &[IoSlice<'_>]) -> Result<usize, Error>
fn write_vectored(&self, bufs: &[IoSlice<'_>]) -> Result<usize, Error>
Like write
, except that it writes from a slice of buffers. Read more
sourcefn write_vectored_at(
&self,
bufs: &[IoSlice<'_>],
offset: u64
) -> Result<usize, Error>
fn write_vectored_at(
&self,
bufs: &[IoSlice<'_>],
offset: u64
) -> Result<usize, Error>
Is to write_vectored
what write_at
is to write
.
sourcefn is_write_vectored_at(&self) -> bool
fn is_write_vectored_at(&self) -> bool
Determines if this Write
r has an efficient write_vectored_at
implementation. Read more
sourcefn flush(&self) -> Result<(), Error>
fn flush(&self) -> Result<(), Error>
Flush this output stream, ensuring that all intermediately buffered contents reach their destination. Read more
sourcefn write_fmt(&self, fmt: Arguments<'_>) -> Result<(), Error>
fn write_fmt(&self, fmt: Arguments<'_>) -> Result<(), Error>
Writes a formatted string into this writer, returning any error encountered. Read more
sourcefn seek(&self, pos: SeekFrom) -> Result<u64, Error>
fn seek(&self, pos: SeekFrom) -> Result<u64, Error>
Seek to an offset, in bytes, in a stream. Read more
sourcefn stream_position(&self) -> Result<u64, Error>
fn stream_position(&self) -> Result<u64, Error>
Returns the current seek position from the start of the stream. Read more
sourcefn read_exact_vectored(&self, bufs: &mut [IoSliceMut<'_>]) -> Result<(), Error>
fn read_exact_vectored(&self, bufs: &mut [IoSliceMut<'_>]) -> Result<(), Error>
Is to read_vectored
what read_exact
is to read
.
sourcefn read_exact_vectored_at(
&self,
bufs: &mut [IoSliceMut<'_>],
offset: u64
) -> Result<(), Error>
fn read_exact_vectored_at(
&self,
bufs: &mut [IoSliceMut<'_>],
offset: u64
) -> Result<(), Error>
Is to read_exact_vectored
what read_exact_at
is to read_exact
.
sourceimpl<T> GetSetFdFlags for T
impl<T> GetSetFdFlags for T
sourcefn get_fd_flags(&self) -> Result<FdFlags, Error> where
T: AsFilelike,
fn get_fd_flags(&self) -> Result<FdFlags, Error> where
T: AsFilelike,
Query the “status” flags for the self
file descriptor.
sourcefn new_set_fd_flags(&self, fd_flags: FdFlags) -> Result<SetFdFlags<T>, Error> where
T: AsFilelike,
fn new_set_fd_flags(&self, fd_flags: FdFlags) -> Result<SetFdFlags<T>, Error> where
T: AsFilelike,
Create a new SetFdFlags
value for use with set_fd_flags
. Read more
sourcefn set_fd_flags(&mut self, set_fd_flags: SetFdFlags<T>) -> Result<(), Error> where
T: AsFilelike,
fn set_fd_flags(&mut self, set_fd_flags: SetFdFlags<T>) -> Result<(), Error> where
T: AsFilelike,
Set the “status” flags for the self
file descriptor. Read more
sourceimpl<T> IsReadWrite for T where
T: AsFilelike,
impl<T> IsReadWrite for T where
T: AsFilelike,
sourceimpl<T> IsTerminal for T where
T: AsFilelike,
impl<T> IsTerminal for T where
T: AsFilelike,
sourcefn is_terminal(&self) -> bool
fn is_terminal(&self) -> bool
Test whether this output stream is attached to a terminal. Read more