1.0.0[−][src]Struct std::fs::Permissions
Representation of the various permissions on a file.
This module only currently provides one bit of information, readonly
,
which is exposed on all currently supported platforms. Unix-specific
functionality, such as mode bits, is available through the
os::unix::PermissionsExt
trait.
Methods
impl Permissions
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impl Permissions
pub fn readonly(&self) -> bool
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pub fn readonly(&self) -> bool
Returns whether these permissions describe a readonly (unwritable) file.
Examples
use std::fs::File; fn main() -> std::io::Result<()> { let mut f = File::create("foo.txt")?; let metadata = f.metadata()?; assert_eq!(false, metadata.permissions().readonly()); Ok(()) }Run
pub fn set_readonly(&mut self, readonly: bool)
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pub fn set_readonly(&mut self, readonly: bool)
Modifies the readonly flag for this set of permissions. If the
readonly
argument is true
, using the resulting Permission
will
update file permissions to forbid writing. Conversely, if it's false
,
using the resulting Permission
will update file permissions to allow
writing.
This operation does not modify the filesystem. To modify the
filesystem use the fs::set_permissions
function.
Examples
use std::fs::File; fn main() -> std::io::Result<()> { let f = File::create("foo.txt")?; let metadata = f.metadata()?; let mut permissions = metadata.permissions(); permissions.set_readonly(true); // filesystem doesn't change assert_eq!(false, metadata.permissions().readonly()); // just this particular `permissions`. assert_eq!(true, permissions.readonly()); Ok(()) }Run
Trait Implementations
impl Clone for Permissions
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impl Clone for Permissions
fn clone(&self) -> Permissions
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fn clone(&self) -> Permissions
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 PartialEq for Permissions
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impl PartialEq for Permissions
fn eq(&self, other: &Permissions) -> bool
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fn eq(&self, other: &Permissions) -> bool
This method tests for self
and other
values to be equal, and is used by ==
. Read more
fn ne(&self, other: &Permissions) -> bool
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fn ne(&self, other: &Permissions) -> bool
This method tests for !=
.
impl Eq for Permissions
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impl Eq for Permissions
impl Debug for Permissions
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impl Debug for Permissions
fn fmt(&self, f: &mut Formatter) -> Result
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fn fmt(&self, f: &mut Formatter) -> Result
Formats the value using the given formatter. Read more
impl PermissionsExt for Permissions
1.1.0[src]
impl PermissionsExt for Permissions
fn mode(&self) -> u32
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fn mode(&self) -> u32
Returns the underlying raw st_mode
bits that contain the standard Unix permissions for this file. Read more
fn set_mode(&mut self, mode: u32)
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fn set_mode(&mut self, mode: u32)
Sets the underlying raw bits for this set of permissions. Read more
fn from_mode(mode: u32) -> Permissions
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fn from_mode(mode: u32) -> Permissions
Creates a new instance of Permissions
from the given set of Unix permission bits. Read more
Auto Trait Implementations
impl Send for Permissions
impl Send for Permissions
impl Sync for Permissions
impl Sync for Permissions
Blanket Implementations
impl<T, U> TryFrom for T where
T: From<U>,
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impl<T, U> TryFrom for T where
T: From<U>,
type Error = !
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
Performs the conversion.
impl<T> From for T
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impl<T> From for T
impl<T, U> TryInto for T where
U: TryFrom<T>,
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impl<T, U> TryInto for T where
U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
Performs the conversion.
impl<T, U> Into for T where
U: From<T>,
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impl<T, U> Into for T where
U: From<T>,
impl<T> Borrow for T where
T: ?Sized,
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impl<T> Borrow for T where
T: ?Sized,
ⓘImportant traits for &'a mut Ifn borrow(&self) -> &T
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fn borrow(&self) -> &T
Immutably borrows from an owned value. Read more
impl<T> BorrowMut for T where
T: ?Sized,
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impl<T> BorrowMut for T where
T: ?Sized,
ⓘImportant traits for &'a mut Ifn borrow_mut(&mut self) -> &mut T
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fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
impl<T> Any for T where
T: 'static + ?Sized,
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impl<T> Any for T where
T: 'static + ?Sized,
fn get_type_id(&self) -> TypeId
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fn get_type_id(&self) -> TypeId
🔬 This is a nightly-only experimental API. (get_type_id
#27745)
this method will likely be replaced by an associated static
Gets the TypeId
of self
. Read more
impl<T> ToOwned for T where
T: Clone,
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impl<T> ToOwned for T where
T: Clone,
type Owned = T
fn to_owned(&self) -> T
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fn to_owned(&self) -> T
Creates owned data from borrowed data, usually by cloning. Read more
fn clone_into(&self, target: &mut T)
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fn clone_into(&self, target: &mut T)
🔬 This is a nightly-only experimental API. (toowned_clone_into
#41263)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more