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sigaction.md 6.44 KB

# sigaction<a name="ZH-CN_TOPIC_0000001055078187"></a>

## **Overview**<a name="section1167484883084843"></a>

**Related Modules:**

[IPC](IPC.md)

**Description:**

Defines the signal processing actions and related attributes. You can use the structures to change the processing actions or attributes.

Describes the signal processing actions and related attributes.

## **Summary**<a name="section651215172084843"></a>

## Data Fields<a name="pub-attribs"></a>

<a name="table259042534084843"></a>
<table><thead align="left"><tr id="row347109807084843"><th class="cellrowborder" valign="top" width="50%" id="mcps1.1.3.1.1"><p id="p116634605084843"><a name="p116634605084843"></a><a name="p116634605084843"></a>Variable Name</p>
</th>
<th class="cellrowborder" valign="top" width="50%" id="mcps1.1.3.1.2"><p id="p222761120084843"><a name="p222761120084843"></a><a name="p222761120084843"></a>Description</p>
</th>
</tr>
</thead>
<tbody><tr id="row1391125968084843"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 ">&nbsp;&nbsp;</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p1096471117084843"><a name="p1096471117084843"></a><a name="p1096471117084843"></a>union {</p>
</td>
</tr>
<tr id="row1075158538084843"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 ">&nbsp;&nbsp;</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p1747732889084843"><a name="p1747732889084843"></a><a name="p1747732889084843"></a>&nbsp;&nbsp;&nbsp;__sighandler_t&nbsp;&nbsp;&nbsp;<a href="sigaction.md#a82821d96f92be37069f72bc9aa99d5e5">_sa_handler</a></p>
</td>
</tr>
<tr id="row564243227084843"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 ">&nbsp;&nbsp;</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p608396694084843"><a name="p608396694084843"></a><a name="p608396694084843"></a>&nbsp;&nbsp;&nbsp;void(*&nbsp;&nbsp;&nbsp;<a href="sigaction.md#aaf872b0c22de6e4d3af0ee7718e5b1b9">_sa_sigaction</a> )(int, struct siginfo *, void *)</p>
</td>
</tr>
<tr id="row1876106102084843"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p667510473084843"><a name="p667510473084843"></a><a name="p667510473084843"></a><a href="sigaction.md#a5a99c96ae6bdfe0c91dcb4948d7aa4c2">_u</a></p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p22683151084843"><a name="p22683151084843"></a><a name="p22683151084843"></a>}&nbsp;</p>
</td>
</tr>
<tr id="row185636332084843"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p2039729377084843"><a name="p2039729377084843"></a><a name="p2039729377084843"></a><a href="sigaction.md#a684e70081d03d46ce70af097ea5cfd49">sa_mask</a></p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p1236484672084843"><a name="p1236484672084843"></a><a name="p1236484672084843"></a>sigset_t&nbsp;</p>
</td>
</tr>
<tr id="row1150799274084843"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p987056464084843"><a name="p987056464084843"></a><a name="p987056464084843"></a><a href="sigaction.md#a03da8b0024c0ae728f55d465b0c9d4d7">sa_flags</a></p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p997048077084843"><a name="p997048077084843"></a><a name="p997048077084843"></a>unsigned long&nbsp;</p>
</td>
</tr>
<tr id="row1118338760084843"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p684856001084843"><a name="p684856001084843"></a><a name="p684856001084843"></a><a href="sigaction.md#aea0dabe7a03641c8b426521f4406b425">sa_flags</a></p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p1731594773084843"><a name="p1731594773084843"></a><a name="p1731594773084843"></a>int&nbsp;</p>
</td>
</tr>
<tr id="row499003106084843"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p1194442546084843"><a name="p1194442546084843"></a><a name="p1194442546084843"></a><a href="sigaction.md#aff7f084aa4099423967033151cec9474">sa_handler</a> )(int)</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p1885527128084843"><a name="p1885527128084843"></a><a name="p1885527128084843"></a>void(*&nbsp;</p>
</td>
</tr>
<tr id="row524726264084843"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p1609997111084843"><a name="p1609997111084843"></a><a name="p1609997111084843"></a><a href="sigaction.md#a0bb0cfd311dfcc20aac020e7d3792b1a">sa_sigaction</a> )(int, siginfo_t *, void *)</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p699733358084843"><a name="p699733358084843"></a><a name="p699733358084843"></a>void(*&nbsp;</p>
</td>
</tr>
</tbody>
</table>

## **Details**<a name="section1281949201084843"></a>

## **Field Documentation**<a name="section936354577084843"></a>

## \_sa\_handler<a name="a82821d96f92be37069f72bc9aa99d5e5"></a>

```
__sighandler_t sigaction::_sa_handler
```

**Description:**

Callback for the processing action

## \_sa\_sigaction<a name="aaf872b0c22de6e4d3af0ee7718e5b1b9"></a>

```
void(* sigaction::_sa_sigaction) (int, struct siginfo *, void *)
```

**Description:**

Callback with signal information for processing actions

## \_u<a name="a5a99c96ae6bdfe0c91dcb4948d7aa4c2"></a>

```
union { ... } sigaction::_u
```

**Description:**

Defines the callbacks for signal processing. You can use either of them based on the specific scenario.

## sa\_flags \[1/2\]<a name="a03da8b0024c0ae728f55d465b0c9d4d7"></a>

```
unsigned long sigaction::sa_flags
```

**Description:**

Signal flag. Only  **SA\_SIGINFO**  is supported.

## sa\_flags \[2/2\]<a name="aea0dabe7a03641c8b426521f4406b425"></a>

```
int sigaction::sa_flags
```

**Description:**

Signal flag, which is not supported

## sa\_handler<a name="aff7f084aa4099423967033151cec9474"></a>

```
void(* sigaction::sa_handler) (int)
```

**Description:**

Signal callback function type and callback for the processing action

## sa\_mask<a name="a684e70081d03d46ce70af097ea5cfd49"></a>

```
sigset_t sigaction::sa_mask
```

**Description:**

Signal to be masked

## sa\_sigaction<a name="a0bb0cfd311dfcc20aac020e7d3792b1a"></a>

```
void(* sigaction::sa_sigaction) (int, siginfo_t *, void *)
```

**Description:**

Signal callback function type, which is not supported

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提交于 2020-09-08 10:08 . add OpenHarmony 1.0 baseline

sigaction

Overview

Related Modules:

Description:

Defines the signal processing actions and related attributes. You can use the structures to change the processing actions or attributes.

Describes the signal processing actions and related attributes.

Summary

Data Fields

Variable Name	Description
	union {
	__sighandler_t _sa_handler
	void(* _sa_sigaction )(int, struct siginfo , void )
_u	}
sa_mask	sigset_t
sa_flags	unsigned long
sa_flags	int
sa_handler )(int)	void(*
sa_sigaction )(int, siginfo_t , void )	void(*

Details

Field Documentation

_sa_handler

__sighandler_t sigaction::_sa_handler

Description:

Callback for the processing action

_sa_sigaction

void(* sigaction::_sa_sigaction) (int, struct siginfo *, void *)

Description:

Callback with signal information for processing actions

_u

union { ... } sigaction::_u

Description:

Defines the callbacks for signal processing. You can use either of them based on the specific scenario.

sa_flags [1/2]

unsigned long sigaction::sa_flags

Description:

Signal flag. Only SA_SIGINFO is supported.

sa_flags [2/2]

int sigaction::sa_flags

Description:

Signal flag, which is not supported

sa_handler

void(* sigaction::sa_handler) (int)

Description:

Signal callback function type and callback for the processing action

sa_mask

sigset_t sigaction::sa_mask

Description:

Signal to be masked

sa_sigaction

void(* sigaction::sa_sigaction) (int, siginfo_t *, void *)

Description:

Signal callback function type, which is not supported

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