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<title>Predefined Constants</title>
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</div><hr /><div id="pcntl.constants" class="appendix">
<h1>Predefined Constants</h1>
<p class="para">
The following list of signals are supported by the Process Control
functions. Please see your systems signal(7) man page for details
of the default behavior of these signals.
</p>
<dl>
<dt id="constant.wnohang">
<strong><code>WNOHANG</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.wuntraced">
<strong><code>WUNTRACED</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sig-ign">
<strong><code>SIG_IGN</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sig-dfl">
<strong><code>SIG_DFL</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sig-err">
<strong><code>SIG_ERR</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sighup">
<strong><code>SIGHUP</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigint">
<strong><code>SIGINT</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigquit">
<strong><code>SIGQUIT</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigill">
<strong><code>SIGILL</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigtrap">
<strong><code>SIGTRAP</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigabrt">
<strong><code>SIGABRT</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigiot">
<strong><code>SIGIOT</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigbus">
<strong><code>SIGBUS</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigfpe">
<strong><code>SIGFPE</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigkill">
<strong><code>SIGKILL</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigusr1">
<strong><code>SIGUSR1</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigsegv">
<strong><code>SIGSEGV</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigusr2">
<strong><code>SIGUSR2</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigpipe">
<strong><code>SIGPIPE</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigalrm">
<strong><code>SIGALRM</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigterm">
<strong><code>SIGTERM</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigstkflt">
<strong><code>SIGSTKFLT</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigcld">
<strong><code>SIGCLD</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigchld">
<strong><code>SIGCHLD</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigcont">
<strong><code>SIGCONT</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigstop">
<strong><code>SIGSTOP</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigtstp">
<strong><code>SIGTSTP</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigttin">
<strong><code>SIGTTIN</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigttou">
<strong><code>SIGTTOU</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigurg">
<strong><code>SIGURG</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigxcpu">
<strong><code>SIGXCPU</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigxfsz">
<strong><code>SIGXFSZ</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigvtalrm">
<strong><code>SIGVTALRM</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigprof">
<strong><code>SIGPROF</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigwinch">
<strong><code>SIGWINCH</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigpoll">
<strong><code>SIGPOLL</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigio">
<strong><code>SIGIO</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigpwr">
<strong><code>SIGPWR</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigsys">
<strong><code>SIGSYS</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sigbaby">
<strong><code>SIGBABY</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
</span>
</dd>
<dt id="constant.sig-block">
<strong><code>SIG_BLOCK</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.sig-unblock">
<strong><code>SIG_UNBLOCK</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.sig-setmask">
<strong><code>SIG_SETMASK</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.si-user">
<strong><code>SI_USER</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.si-noinfo">
<strong><code>SI_NOINFO</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.si-kernel">
<strong><code>SI_KERNEL</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.si-queue">
<strong><code>SI_QUEUE</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.si-timer">
<strong><code>SI_TIMER</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.si-msggq">
<strong><code>SI_MSGGQ</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.si-asyncio">
<strong><code>SI_ASYNCIO</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.si-sigio">
<strong><code>SI_SIGIO</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.si-tkill">
<strong><code>SI_TKILL</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.cld-exited">
<strong><code>CLD_EXITED</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.cld-killed">
<strong><code>CLD_KILLED</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.cld-dumped">
<strong><code>CLD_DUMPED</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.cld-trapped">
<strong><code>CLD_TRAPPED</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.cld-stopped">
<strong><code>CLD_STOPPED</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.cld-continued">
<strong><code>CLD_CONTINUED</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.trap-brkpt">
<strong><code>TRAP_BRKPT</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.trap-trace">
<strong><code>TRAP_TRACE</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.poll-in">
<strong><code>POLL_IN</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.poll-out">
<strong><code>POLL_OUT</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.poll-msg">
<strong><code>POLL_MSG</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.poll-err">
<strong><code>POLL_ERR</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.poll-pri">
<strong><code>POLL_PRI</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.poll-hup">
<strong><code>POLL_HUP</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.ill-illopc">
<strong><code>ILL_ILLOPC</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.ill-illopn">
<strong><code>ILL_ILLOPN</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.ill-illadr">
<strong><code>ILL_ILLADR</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.ill-illtrp">
<strong><code>ILL_ILLTRP</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.ill-prvopc">
<strong><code>ILL_PRVOPC</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.ill-prvreg">
<strong><code>ILL_PRVREG</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.ill-coproc">
<strong><code>ILL_COPROC</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.ill-badstk">
<strong><code>ILL_BADSTK</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.fpe-intdiv">
<strong><code>FPE_INTDIV</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.fpe-intovf">
<strong><code>FPE_INTOVF</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.fpe-fltdiv">
<strong><code>FPE_FLTDIV</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.fpe-fltovf">
<strong><code>FPE_FLTOVF</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.fpe-fltund">
<strong><code>FPE_FLTUND</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.fpe-fltres">
<strong><code>FPE_FLTRES</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.fpe-fltinv">
<strong><code>FPE_FLTINV</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.fpe-fltsub">
<strong><code>FPE_FLTSUB</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.segv-maperr">
<strong><code>SEGV_MAPERR</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.segv-accerr">
<strong><code>SEGV_ACCERR</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.bus-adraln">
<strong><code>BUS_ADRALN</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.bus-adrerr">
<strong><code>BUS_ADRERR</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
<dt id="constant.bus-objerr">
<strong><code>BUS_OBJERR</code></strong>
(<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>)
</dt>
<dd>
<span class="simpara">
Available since PHP 5.3.0.
</span>
</dd>
</dl>
</div>
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