Struct rustix::fs::OFlags

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pub struct OFlags(/* private fields */);
Expand description

O_* constants for use with openat.

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impl OFlags

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pub const ACCMODE: Self = _

O_ACCMODE

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pub const RWMODE: Self = _

Similar to ACCMODE, but just includes the read/write flags, and no other flags.

On some platforms, PATH may be included in ACCMODE, when sometimes we really just want the read/write bits. Caution is indicated, as the presence of PATH may mean that the read/write bits don’t have their usual meaning.

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pub const APPEND: Self = _

O_APPEND

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pub const CREATE: Self = _

O_CREAT

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pub const DIRECTORY: Self = _

O_DIRECTORY

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pub const DSYNC: Self = _

O_DSYNC.

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pub const EXCL: Self = _

O_EXCL

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pub const FSYNC: Self = _

O_FSYNC.

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pub const NOFOLLOW: Self = _

O_NOFOLLOW

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pub const NONBLOCK: Self = _

O_NONBLOCK

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pub const RDONLY: Self = _

O_RDONLY

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pub const WRONLY: Self = _

O_WRONLY

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pub const RDWR: Self = _

O_RDWR

This is not equal to RDONLY | WRONLY. It’s a distinct flag.

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pub const NOCTTY: Self = _

O_NOCTTY

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pub const RSYNC: Self = _

O_RSYNC.

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pub const SYNC: Self = _

O_SYNC

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pub const TRUNC: Self = _

O_TRUNC

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pub const PATH: Self = _

O_PATH

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pub const CLOEXEC: Self = _

O_CLOEXEC

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pub const TMPFILE: Self = _

O_TMPFILE

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pub const NOATIME: Self = _

O_NOATIME

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pub const DIRECT: Self = _

O_DIRECT

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pub const LARGEFILE: Self = _

O_LARGEFILE

Note that rustix and/or libc will automatically set this flag when appropriate on open(2) and friends, thus typical users do not need to care about it. It will may be reported in return of fcntl_getfl, though.

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impl OFlags

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pub const fn empty() -> Self

Get a flags value with all bits unset.

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pub const fn all() -> Self

Get a flags value with all known bits set.

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pub const fn bits(&self) -> c_uint

Get the underlying bits value.

The returned value is exactly the bits set in this flags value.

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pub const fn from_bits(bits: c_uint) -> Option<Self>

Convert from a bits value.

This method will return None if any unknown bits are set.

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pub const fn from_bits_truncate(bits: c_uint) -> Self

Convert from a bits value, unsetting any unknown bits.

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pub const fn from_bits_retain(bits: c_uint) -> Self

Convert from a bits value exactly.

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pub fn from_name(name: &str) -> Option<Self>

Get a flags value with the bits of a flag with the given name set.

This method will return None if name is empty or doesn’t correspond to any named flag.

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pub const fn is_empty(&self) -> bool

Whether all bits in this flags value are unset.

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pub const fn is_all(&self) -> bool

Whether all known bits in this flags value are set.

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pub const fn intersects(&self, other: Self) -> bool

Whether any set bits in a source flags value are also set in a target flags value.

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pub const fn contains(&self, other: Self) -> bool

Whether all set bits in a source flags value are also set in a target flags value.

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pub fn insert(&mut self, other: Self)

The bitwise or (|) of the bits in two flags values.

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pub fn remove(&mut self, other: Self)

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. remove won’t truncate other, but the ! operator will.

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pub fn toggle(&mut self, other: Self)

The bitwise exclusive-or (^) of the bits in two flags values.

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pub fn set(&mut self, other: Self, value: bool)

Call insert when value is true or remove when value is false.

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pub const fn intersection(self, other: Self) -> Self

The bitwise and (&) of the bits in two flags values.

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pub const fn union(self, other: Self) -> Self

The bitwise or (|) of the bits in two flags values.

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pub const fn difference(self, other: Self) -> Self

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

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pub const fn symmetric_difference(self, other: Self) -> Self

The bitwise exclusive-or (^) of the bits in two flags values.

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pub const fn complement(self) -> Self

The bitwise negation (!) of the bits in a flags value, truncating the result.

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impl OFlags

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pub const fn iter(&self) -> Iter<OFlags>

Yield a set of contained flags values.

Each yielded flags value will correspond to a defined named flag. Any unknown bits will be yielded together as a final flags value.

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pub const fn iter_names(&self) -> IterNames<OFlags>

Yield a set of contained named flags values.

This method is like iter, except only yields bits in contained named flags. Any unknown bits, or bits not corresponding to a contained flag will not be yielded.

Trait Implementations§

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impl Binary for OFlags

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl BitAnd for OFlags

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fn bitand(self, other: Self) -> Self

The bitwise and (&) of the bits in two flags values.

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type Output = OFlags

The resulting type after applying the & operator.
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impl BitAndAssign for OFlags

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fn bitand_assign(&mut self, other: Self)

The bitwise and (&) of the bits in two flags values.

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impl BitOr for OFlags

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fn bitor(self, other: OFlags) -> Self

The bitwise or (|) of the bits in two flags values.

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type Output = OFlags

The resulting type after applying the | operator.
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impl BitOrAssign for OFlags

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fn bitor_assign(&mut self, other: Self)

The bitwise or (|) of the bits in two flags values.

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impl BitXor for OFlags

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fn bitxor(self, other: Self) -> Self

The bitwise exclusive-or (^) of the bits in two flags values.

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type Output = OFlags

The resulting type after applying the ^ operator.
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impl BitXorAssign for OFlags

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fn bitxor_assign(&mut self, other: Self)

The bitwise exclusive-or (^) of the bits in two flags values.

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impl Clone for OFlags

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fn clone(&self) -> OFlags

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 Debug for OFlags

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Extend<OFlags> for OFlags

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fn extend<T: IntoIterator<Item = Self>>(&mut self, iterator: T)

The bitwise or (|) of the bits in each flags value.

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fn extend_one(&mut self, item: A)

🔬This is a nightly-only experimental API. (extend_one)
Extends a collection with exactly one element.
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fn extend_reserve(&mut self, additional: usize)

🔬This is a nightly-only experimental API. (extend_one)
Reserves capacity in a collection for the given number of additional elements. Read more
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impl Flags for OFlags

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const FLAGS: &'static [Flag<OFlags>] = _

The set of defined flags.
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type Bits = u32

The underlying bits type.
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fn bits(&self) -> c_uint

Get the underlying bits value. Read more
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fn from_bits_retain(bits: c_uint) -> OFlags

Convert from a bits value exactly.
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fn empty() -> Self

Get a flags value with all bits unset.
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fn all() -> Self

Get a flags value with all known bits set.
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fn from_bits(bits: Self::Bits) -> Option<Self>

Convert from a bits value. Read more
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fn from_bits_truncate(bits: Self::Bits) -> Self

Convert from a bits value, unsetting any unknown bits.
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fn from_name(name: &str) -> Option<Self>

Get a flags value with the bits of a flag with the given name set. Read more
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fn iter(&self) -> Iter<Self>

Yield a set of contained flags values. Read more
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fn iter_names(&self) -> IterNames<Self>

Yield a set of contained named flags values. Read more
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fn is_empty(&self) -> bool

Whether all bits in this flags value are unset.
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fn is_all(&self) -> bool

Whether all known bits in this flags value are set.
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fn intersects(&self, other: Self) -> bool
where Self: Sized,

Whether any set bits in a source flags value are also set in a target flags value.
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fn contains(&self, other: Self) -> bool
where Self: Sized,

Whether all set bits in a source flags value are also set in a target flags value.
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fn insert(&mut self, other: Self)
where Self: Sized,

The bitwise or (|) of the bits in two flags values.
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fn remove(&mut self, other: Self)
where Self: Sized,

The intersection of a source flags value with the complement of a target flags value (&!). Read more
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fn toggle(&mut self, other: Self)
where Self: Sized,

The bitwise exclusive-or (^) of the bits in two flags values.
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fn set(&mut self, other: Self, value: bool)
where Self: Sized,

Call Flags::insert when value is true or Flags::remove when value is false.
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fn intersection(self, other: Self) -> Self

The bitwise and (&) of the bits in two flags values.
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fn union(self, other: Self) -> Self

The bitwise or (|) of the bits in two flags values.
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fn difference(self, other: Self) -> Self

The intersection of a source flags value with the complement of a target flags value (&!). Read more
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fn symmetric_difference(self, other: Self) -> Self

The bitwise exclusive-or (^) of the bits in two flags values.
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fn complement(self) -> Self

The bitwise negation (!) of the bits in a flags value, truncating the result.
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impl FromIterator<OFlags> for OFlags

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fn from_iter<T: IntoIterator<Item = Self>>(iterator: T) -> Self

The bitwise or (|) of the bits in each flags value.

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impl Hash for OFlags

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl IntoIterator for OFlags

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type Item = OFlags

The type of the elements being iterated over.
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type IntoIter = Iter<OFlags>

Which kind of iterator are we turning this into?
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fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value. Read more
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impl LowerHex for OFlags

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Not for OFlags

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fn not(self) -> Self

The bitwise negation (!) of the bits in a flags value, truncating the result.

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type Output = OFlags

The resulting type after applying the ! operator.
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impl Octal for OFlags

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl PartialEq for OFlags

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fn eq(&self, other: &OFlags) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl PublicFlags for OFlags

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type Primitive = u32

The type of the underlying storage.
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type Internal = InternalBitFlags

The type of the internal field on the generated flags type.
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impl Sub for OFlags

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fn sub(self, other: Self) -> Self

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

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type Output = OFlags

The resulting type after applying the - operator.
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impl SubAssign for OFlags

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fn sub_assign(&mut self, other: Self)

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

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impl UpperHex for OFlags

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Copy for OFlags

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impl Eq for OFlags

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impl StructuralPartialEq for OFlags

Auto Trait Implementations§

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impl Freeze for OFlags

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impl RefUnwindSafe for OFlags

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impl Send for OFlags

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impl Sync for OFlags

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impl Unpin for OFlags

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impl UnwindSafe for OFlags

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> 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> CloneToUninit for T
where T: Copy,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. 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.