Struct CloneFlags

pub struct CloneFlags(/* private fields */);

克隆标志，用于 clone(2) 或 clone3(2) 系统调用。

MUSL: https://github.com/bminor/musl/blob/c47ad25ea3b484e10326f933e927c0bc8cded3da/include/sched.h#L50

Implementations

impl CloneFlags

pub const CSIGNAL: Self

指定发送给子进程的信号（低 8 位），如 SIGCHLD

pub const CLONE_NEWTIME: Self

使用新的 time 命名空间（Linux 5.6+）

pub const CLONE_VM: Self

与父进程共享内存空间（即使用相同地址空间）

pub const CLONE_FS: Self

与父进程共享文件系统信息（当前目录、root 等）

pub const CLONE_FILES: Self

与父进程共享打开的文件描述符

pub const CLONE_SIGHAND: Self

与父进程共享信号处理函数

pub const CLONE_PIDFD: Self

将 PIDFD 文件描述符写入 clone 参数中指定的位置

pub const CLONE_PTRACE: Self

被调试器使用，子进程会被 trace（如 ptrace）

pub const CLONE_VFORK: Self

以 vfork 语义启动子进程，阻塞父进程直到 exec/exit

pub const CLONE_PARENT: Self

设置父进程为新进程的 parent，而不是调用进程

pub const CLONE_THREAD: Self

与父进程成为线程（共享 signal、VM、文件等）

pub const CLONE_NEWNS: Self

使用新的挂载命名空间（mount namespace）

pub const CLONE_SYSVSEM: Self

与父进程共享 System V 信号量

pub const CLONE_SETTLS: Self

设置 TLS（线程局部存储）指针

pub const CLONE_PARENT_SETTID: Self

在指定地址写入子进程的 TID（parent 设置）

pub const CLONE_CHILD_CLEARTID: Self

进程退出时自动清除 TID（通常用于 futex 唤醒）

pub const CLONE_DETACHED: Self

被废弃，曾用于标记 detached 线程

pub const CLONE_UNTRACED: Self

禁用子进程被 trace

pub const CLONE_CHILD_SETTID: Self

在指定地址写入子进程的 TID（child 设置）

pub const CLONE_NEWCGROUP: Self

使用新的 cgroup 命名空间（隔离控制组）

pub const CLONE_NEWUTS: Self

使用新的 UTS 命名空间（隔离主机名/域名）

pub const CLONE_NEWIPC: Self

使用新的 IPC 命名空间（隔离 System V IPC）

pub const CLONE_NEWUSER: Self

使用新的用户命名空间（user namespace）

pub const CLONE_NEWPID: Self

使用新的 PID 命名空间（隔离进程号）

pub const CLONE_NEWNET: Self

使用新的网络命名空间（network namespace）

pub const CLONE_IO: Self

启用 I/O 上下文的共享（Linux 2.6.25+）

impl CloneFlags

pub const fn empty() -> Self

Get a flags value with all bits unset.

pub const fn all() -> Self

Get a flags value with all known bits set.

pub const fn bits(&self) -> u32

Get the underlying bits value.

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

pub const fn from_bits(bits: u32) -> Option<Self>

Convert from a bits value.

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

pub const fn from_bits_truncate(bits: u32) -> Self

Convert from a bits value, unsetting any unknown bits.

pub const fn from_bits_retain(bits: u32) -> Self

Convert from a bits value exactly.

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.

pub const fn is_empty(&self) -> bool

Whether all bits in this flags value are unset.

pub const fn is_all(&self) -> bool

Whether all known bits in this flags value are set.

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.

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.

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

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

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.

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

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

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

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

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

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

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

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

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.

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

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

pub const fn complement(self) -> Self

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

impl CloneFlags

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

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.

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

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

impl Binary for CloneFlags

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

Formats the value using the given formatter.

impl BitAnd for CloneFlags

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

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

type Output = CloneFlags

The resulting type after applying the & operator.

impl BitAndAssign for CloneFlags

fn bitand_assign(&mut self, other: Self)

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

impl BitOr for CloneFlags

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

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

type Output = CloneFlags

The resulting type after applying the | operator.

impl BitOrAssign for CloneFlags

fn bitor_assign(&mut self, other: Self)

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

impl BitXor for CloneFlags

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

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

type Output = CloneFlags

The resulting type after applying the ^ operator.

impl BitXorAssign for CloneFlags

fn bitxor_assign(&mut self, other: Self)

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

impl Debug for CloneFlags

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

Formats the value using the given formatter.

impl Extend<CloneFlags> for CloneFlags

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

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

fn extend_one(&mut self, item: A)

🔬This is a nightly-only experimental API. (extend_one)

Extends a collection with exactly one element.

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.

impl Flags for CloneFlags

const FLAGS: &'static [Flag<CloneFlags>]

The set of defined flags.

type Bits = u32

The underlying bits type.

fn bits(&self) -> u32

Get the underlying bits value.

fn from_bits_retain(bits: u32) -> CloneFlags

Convert from a bits value exactly.

fn empty() -> Self

Get a flags value with all bits unset.

fn all() -> Self

Get a flags value with all known bits set.

fn contains_unknown_bits(&self) -> bool

This method will return true if any unknown bits are set.

fn from_bits(bits: Self::Bits) -> Option<Self>

Convert from a bits value.

fn from_bits_truncate(bits: Self::Bits) -> Self

Convert from a bits value, unsetting any unknown bits.

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

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

fn iter(&self) -> Iter<Self>

Yield a set of contained flags values.

fn iter_names(&self) -> IterNames<Self>

Yield a set of contained named flags values.

fn is_empty(&self) -> bool

Whether all bits in this flags value are unset.

fn is_all(&self) -> bool

Whether all known bits in this flags value are set.

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.

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.

fn truncate(&mut self)

where Self: Sized,

Remove any unknown bits from the flags.

fn insert(&mut self, other: Self)

where Self: Sized,

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

fn remove(&mut self, other: Self)

where Self: Sized,

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

fn toggle(&mut self, other: Self)

where Self: Sized,

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

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.

fn clear(&mut self)

where Self: Sized,

Unsets all bits in the flags.

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

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

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

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

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

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

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

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

fn complement(self) -> Self

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

impl FromIterator<CloneFlags> for CloneFlags

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

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

impl IntoIterator for CloneFlags

type Item = CloneFlags

The type of the elements being iterated over.

type IntoIter = Iter<CloneFlags>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl LowerHex for CloneFlags

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

Formats the value using the given formatter.

impl Not for CloneFlags

fn not(self) -> Self

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

type Output = CloneFlags

The resulting type after applying the ! operator.

impl Octal for CloneFlags

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

Formats the value using the given formatter.

impl PublicFlags for CloneFlags

type Primitive = u32

The type of the underlying storage.

type Internal = InternalBitFlags

The type of the internal field on the generated flags type.

impl Sub for CloneFlags

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.

type Output = CloneFlags

The resulting type after applying the - operator.

impl SubAssign for CloneFlags

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.

impl UpperHex for CloneFlags

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

Formats the value using the given formatter.