Enum FcntlCmd 

#[repr(i32)]
pub enum FcntlCmd {
    DupFd = 0,
    GetFd = 1,
    SetFd = 2,
    GetFl = 3,
    SetFl = 4,
    GetLk = 5,
    SetLk = 6,
    SetLkW = 7,
    SetOwn = 8,
    GetOwn = 9,
    SetSig = 10,
    GetSig = 11,
    DupFdCloexec = 1_030,
    SetPipeSz = 1_031,
    GetPipeSz = 1_032,
}

fcntl 命令

使用枚举避免魔数，提供类型安全 参考：include/uapi/asm-generic/fcntl.h

Variants

DupFd = 0

复制文件描述符，新 fd >= arg (F_DUPFD)

GetFd = 1

获取文件描述符标志 (F_GETFD)

SetFd = 2

设置文件描述符标志 (F_SETFD)

GetFl = 3

获取文件状态标志 (F_GETFL)

SetFl = 4

设置文件状态标志 (F_SETFL)

GetLk = 5

获取锁信息 (F_GETLK)

SetLk = 6

设置锁（非阻塞）(F_SETLK)

SetLkW = 7

设置锁（阻塞）(F_SETLKW)

SetOwn = 8

设置异步 I/O 所有者 (F_SETOWN)

GetOwn = 9

获取异步 I/O 所有者 (F_GETOWN)

SetSig = 10

设置信号 (F_SETSIG)

GetSig = 11

获取信号 (F_GETSIG)

DupFdCloexec = 1_030

复制 fd 并设置 CLOEXEC (F_DUPFD_CLOEXEC)

SetPipeSz = 1_031

设置管道大小 (F_SETPIPE_SZ)

GetPipeSz = 1_032

获取管道大小 (F_GETPIPE_SZ)

Implementations

impl FcntlCmd

pub fn from_raw(cmd: i32) -> Option<Self>

从 i32 转换为 FcntlCmd

返回值

• Some(cmd): 识别的命令
• None: 未知命令

Trait Implementations

impl Clone for FcntlCmd

fn clone(&self) -> FcntlCmd

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FcntlCmd

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

Formats the value using the given formatter.

impl PartialEq for FcntlCmd

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

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for FcntlCmd

impl Eq for FcntlCmd

impl StructuralPartialEq for FcntlCmd