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authorCraig Jennings <c@cjennings.net>2025-08-14 22:58:58 -0500
committerCraig Jennings <c@cjennings.net>2025-08-14 22:58:58 -0500
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- <h1 id="firstHeading" class="firstHeading">raise</h1> <table class="t-dcl-begin"> <tr class="t-dsc-header"> <th> Defined in header <code>&lt;signal.h&gt;</code> </th> <th> </th> <th> </th> </tr> <tr class="t-dcl"> <td class="t-dcl-nopad"> <pre data-language="c">int raise( int sig );</pre>
-</td> <td class="t-dcl-nopad"> </td> <td class="t-dcl-nopad"> </td> </tr> </table> <p>Sends signal sig to the program. The signal handler, specified using <code><a href="signal" title="c/program/signal">signal()</a></code>, is invoked.</p>
-<p>If the user-defined signal handling strategy is not set using <code><a href="signal" title="c/program/signal">signal()</a></code> yet, it is implementation-defined whether the signal will be ignored or default handler will be invoked.</p>
-<h3 id="Parameters"> Parameters</h3> <table class="t-par-begin"> <tr class="t-par"> <td> sig </td> <td> - </td> <td> the signal to be sent. It can be an implementation-defined value or one of the following values: <table class="t-dsc-begin"> <tr class="t-dsc"> <td> <div><a href="sig_types" title="c/program/SIG types"> <span class="t-lines"><span>SIGABRT</span><span>SIGFPE</span><span>SIGILL</span><span>SIGINT</span><span>SIGSEGV</span><span>SIGTERM</span></span></a></div> </td> <td> defines signal types <br> <span class="t-mark">(macro constant)</span> </td>
-</tr> </table> </td>
-</tr>
-</table> <h3 id="Return_value"> Return value</h3> <p><code>​0​</code> upon success, non-zero value on failure.</p>
-<h3 id="Example"> Example</h3> <div class="t-example"> <div class="c source-c"><pre data-language="c">#include &lt;signal.h&gt;
-#include &lt;stdio.h&gt;
-
-void signal_handler(int signal)
-{
- printf("Received signal %d\n", signal);
-}
-
-int main(void)
-{
- // Install a signal handler.
- signal(SIGTERM, signal_handler);
-
- printf("Sending signal %d\n", SIGTERM);
- raise(SIGTERM);
- printf("Exit main()\n");
-}</pre></div> <p>Output:</p>
-<div class="text source-text"><pre data-language="c">Sending signal 15
-Received signal 15
-Exit main()</pre></div> </div> <h3 id="References"> References</h3> <ul>
-<li> C17 standard (ISO/IEC 9899:2018): </li>
-<ul><li> 7.14.2.1 The raise function (p: 194-195) </li></ul>
-<li> C11 standard (ISO/IEC 9899:2011): </li>
-<ul><li> 7.14.2.1 The raise function (p: 267) </li></ul>
-<li> C99 standard (ISO/IEC 9899:1999): </li>
-<ul><li> 7.14.2.1 The raise function (p: 248) </li></ul>
-<li> C89/C90 standard (ISO/IEC 9899:1990): </li>
-<ul><li> 4.7.2.1 The raise function </li></ul>
-</ul> <h3 id="See_also"> See also</h3> <table class="t-dsc-begin"> <tr class="t-dsc"> <td> <div><a href="signal" title="c/program/signal"> <span class="t-lines"><span>signal</span></span></a></div> </td> <td> sets a signal handler for particular signal <br> <span class="t-mark">(function)</span> </td>
-</tr> <tr class="t-dsc"> <td colspan="2"> <span><a href="https://en.cppreference.com/w/cpp/utility/program/raise" title="cpp/utility/program/raise">C++ documentation</a></span> for <code>raise</code> </td>
-</tr> </table> <div class="_attribution">
- <p class="_attribution-p">
- &copy; cppreference.com<br>Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.<br>
- <a href="https://en.cppreference.com/w/c/program/raise" class="_attribution-link">https://en.cppreference.com/w/c/program/raise</a>
- </p>
-</div>