Struct axfs::api::File

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pub struct File { /* private fields */ }
Expand description

An object providing access to an open file on the filesystem.

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impl File

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pub fn open(path: &str) -> Result<Self>

Attempts to open a file in read-only mode.

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pub fn create(path: &str) -> Result<Self>

Opens a file in write-only mode.

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pub fn create_new(path: &str) -> Result<Self>

Creates a new file in read-write mode; error if the file exists.

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pub fn options() -> OpenOptions

Returns a new OpenOptions object.

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pub fn set_len(&self, size: u64) -> Result<()>

Truncates or extends the underlying file, updating the size of this file to become size.

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pub fn metadata(&self) -> Result<Metadata>

Queries metadata about the underlying file.

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pub fn executable(&self) -> bool

Whether the file is executable.

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pub fn get_attr(&self) -> Result<FileAttr>

Get the file attributes.

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pub fn truncate(&mut self, len: usize) -> Result<()>

To truncate the file to a specified length.

Trait Implementations§

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impl Clone for File

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fn clone(&self) -> File

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl FileExt for File

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fn readable(&self) -> bool

whether the file is readable
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fn writable(&self) -> bool

whether the file is writable
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fn executable(&self) -> bool

whether the file is executable
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fn read_from_seek(&mut self, pos: SeekFrom, buf: &mut [u8]) -> AxResult<usize>

Read from position without changing cursor.
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fn write_to_seek(&mut self, pos: SeekFrom, buf: &[u8]) -> AxResult<usize>

Write to position without changing cursor.
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impl Read for File

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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.
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fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize, AxError>

Available on crate feature alloc only.
Read all bytes until EOF in this source, placing them into buf.
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fn read_to_string(&mut self, buf: &mut String) -> Result<usize, AxError>

Available on crate feature alloc only.
Read all bytes until EOF in this source, appending them to buf.
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fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), AxError>

Read the exact number of bytes required to fill buf.
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fn read_full(&mut self, buf: &mut [u8]) -> Result<usize, AxError>

Read the exact number of bytes required to fill buf.
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impl Seek for File

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fn seek(&mut self, pos: SeekFrom) -> Result<u64>

Seek to an offset, in bytes, in a stream. Read more
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fn rewind(&mut self) -> Result<(), AxError>

Rewind to the beginning of a stream. Read more
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fn stream_position(&mut self) -> Result<u64, AxError>

Returns the current seek position from the start of the stream. Read more
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impl Write for File

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fn write(&mut self, buf: &[u8]) -> Result<usize>

Write a buffer into this writer, returning how many bytes were written.
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fn flush(&mut self) -> Result<()>

Flush this output stream, ensuring that all intermediately buffered contents reach their destination.
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fn write_all(&mut self, buf: &[u8]) -> Result<(), AxError>

Attempts to write an entire buffer into this writer.
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fn write_fmt(&mut self, fmt: Arguments<'_>) -> Result<(), AxError>

Writes a formatted string into this writer, returning any error encountered.

Auto Trait Implementations§

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impl !RefUnwindSafe for File

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impl Send for File

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impl Sync for File

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impl Unpin for File

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impl !UnwindSafe for File

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> AsAny for T
where T: Any,

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fn as_any(&self) -> &(dyn Any + 'static)

把当前对象转化为 Any 类型,供后续 downcast 使用
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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

供 downcast_mut 使用
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.