Enum SignalNum

#[repr(u8)]
pub enum SignalNum {
    HUP = 1,
    INT = 2,
    QUIT = 3,
    ILL = 4,
    TRAP = 5,
    ABRT = 6,
    BUS = 7,
    FPE = 8,
    KILL = 9,
    USR1 = 10,
    SEGV = 11,
    USR2 = 12,
    PIPE = 13,
    ALRM = 14,
    TERM = 15,
    STKFLT = 16,
    CHLD = 17,
    CONT = 18,
    STOP = 19,
    TSTP = 20,
    TTIN = 21,
    TTOU = 22,
    URG = 23,
    XCPU = 24,
    XFSZ = 25,
    VTALRM = 26,
    PROF = 27,
    WINCH = 28,
    IO = 29,
    PWR = 30,
    SYS = 31,
    TIMER = 32,
    CANCEL = 33,
    SYNCCALL = 34,
    RT3 = 35,
    RT4 = 36,
    RT5 = 37,
    RT6 = 38,
    RT7 = 39,
    RT8 = 40,
    RT9 = 41,
    RT10 = 42,
    RT11 = 43,
    RT12 = 44,
    RT13 = 45,
    RT14 = 46,
    RT15 = 47,
    RT16 = 48,
    RT17 = 49,
    RT18 = 50,
    RT19 = 51,
    RT20 = 52,
    RT21 = 53,
    RT22 = 54,
    RT23 = 55,
    RT24 = 56,
    RT25 = 57,
    RT26 = 58,
    RT27 = 59,
    RT28 = 60,
    RT29 = 61,
    RT30 = 62,
    RT31 = 63,
    RTMAX = 64,
}

POSIX 标准、线程扩展与实时信号枚举定义（信号编号从 1 开始） MUSL: https://github.com/bminor/musl/blob/c47ad25ea3b484e10326f933e927c0bc8cded3da/arch/aarch64/bits/signal.h#L118

Variants

HUP = 1

终端挂起（Hangup）

INT = 2

交互式中断（Interrupt）

QUIT = 3

退出（Quit）

ILL = 4

非法指令（Illegal instruction）

TRAP = 5

断点（Trace/breakpoint trap）

ABRT = 6

异常终止（Abort）

BUS = 7

总线错误（Bus error）

FPE = 8

浮点异常（Floating-point exception）

KILL = 9

强制终止（Kill，不可被捕获或忽略）

USR1 = 10

用户定义信号 1

SEGV = 11

段错误（Segmentation fault）

USR2 = 12

用户定义信号 2

PIPE = 13

管道破裂（Broken pipe）

ALRM = 14

报警时钟（Alarm clock）

TERM = 15

终止请求（Termination）

STKFLT = 16

协处理器堆栈故障（栈浮点错误，仅部分平台支持）

CHLD = 17

子进程终止或状态变化（Child）

CONT = 18

继续执行（Continue）

STOP = 19

停止进程（不可忽略）

TSTP = 20

终端停止（来自 TTY 的 Ctrl+Z）

TTIN = 21

后台读取控制终端

TTOU = 22

后台写入控制终端

URG = 23

紧急条件（Urgent socket）

XCPU = 24

超过 CPU 时间限制

XFSZ = 25

超过文件大小限制

VTALRM = 26

虚拟计时器到期（Virtual alarm）

PROF = 27

性能分析计时器到期（Profiling alarm）

WINCH = 28

窗口大小改变（Window size change）

IO = 29

异步 I/O（I/O now possible）

PWR = 30

电源失败（Power failure）

SYS = 31

非法系统调用（Bad syscall）

TIMER = 32

POSIX 线程：定时器信号

CANCEL = 33

POSIX 线程：取消信号

SYNCCALL = 34

POSIX 线程：同步调用信号

RT3 = 35

实时信号 3（Real-time signal 3）

RT4 = 36

实时信号 4

RT5 = 37

实时信号 5

RT6 = 38

实时信号 6

RT7 = 39

实时信号 7

RT8 = 40

实时信号 8

RT9 = 41

实时信号 9

RT10 = 42

实时信号 10

RT11 = 43

实时信号 11

RT12 = 44

实时信号 12

RT13 = 45

实时信号 13

RT14 = 46

实时信号 14

RT15 = 47

实时信号 15

RT16 = 48

实时信号 16

RT17 = 49

实时信号 17

RT18 = 50

实时信号 18

RT19 = 51

实时信号 19

RT20 = 52

实时信号 20

RT21 = 53

实时信号 21

RT22 = 54

实时信号 22

RT23 = 55

实时信号 23

RT24 = 56

实时信号 24

RT25 = 57

实时信号 25

RT26 = 58

实时信号 26

RT27 = 59

实时信号 27

RT28 = 60

实时信号 28

RT29 = 61

实时信号 29

RT30 = 62

实时信号 30

RT31 = 63

实时信号 31

RTMAX = 64

最大实时信号（Real-time signal max）

Implementations

impl SignalNum

pub fn from_num(num: usize) -> Option<SignalNum>

从数字构造 SignalNum 枚举，如果超出合法范围则返回 None。

pub const fn num(&self) -> usize

获取信号的编号（number）。

pub const fn is_rt(&self) -> bool

判断是否为实时信号（Real-time Signal）。

实时信号从编号 REAL_TIME_SIGNAL_NUM 开始。

pub fn real_time_index(&self) -> Option<usize>

如果是实时信号，则返回其在实时信号表中的索引（从 1 开始）。

例如，编号为 REAL_TIME_SIGNAL_NUM 的信号返回 1。

pub const fn mask(&self) -> u64

获取信号的位掩码（bit mask）。

信号编号从 1 开始，因此返回值为 1 << (num - 1)。

Trait Implementations

impl Clone for SignalNum

fn clone(&self) -> SignalNum

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for SignalNum

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

Formats the value using the given formatter.

impl PartialEq for SignalNum

fn eq(&self, other: &SignalNum) -> 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 TryFrom<u8> for SignalNum

type Error = TryFromPrimitiveError<SignalNum>

The type returned in the event of a conversion error.

fn try_from(number: u8) -> Result<Self, TryFromPrimitiveError<Self>>

Performs the conversion.

impl TryFromPrimitive for SignalNum

const NAME: &'static str = "SignalNum"

type Primitive = u8

type Error = TryFromPrimitiveError<SignalNum>

fn try_from_primitive( number: Self::Primitive, ) -> Result<Self, TryFromPrimitiveError<Self>>

impl Copy for SignalNum

impl Eq for SignalNum

impl StructuralPartialEq for SignalNum