<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >pcntl_waitpid</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REL="HOME" TITLE="Manual do PHP" HREF="index.html"><LINK REL="UP" TITLE="Process Control Functions" HREF="ref.pcntl.html"><LINK REL="PREVIOUS" TITLE="pcntl_wait" HREF="function.pcntl-wait.html"><LINK REL="NEXT" TITLE="pcntl_wexitstatus" HREF="function.pcntl-wexitstatus.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=UTF-8"></HEAD ><BODY CLASS="refentry" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >Manual do PHP</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="function.pcntl-wait.html" ACCESSKEY="P" >Anterior</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.pcntl-wexitstatus.html" ACCESSKEY="N" >Próxima</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.pcntl-waitpid" ></A >pcntl_waitpid</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN165301" ></A ><P > (PHP 4 >= 4.1.0, PHP 5)</P >pcntl_waitpid -- Waits on or returns the status of a forked child</DIV ><DIV CLASS="refsect1" ><A NAME="AEN165304" ></A ><H2 >Descrição</H2 >int <B CLASS="methodname" >pcntl_waitpid</B > ( int pid, int &status [, int options] )<BR ></BR ><P > Suspends execution of the current process until a child as specified by the <CODE CLASS="parameter" >pid</CODE > argument has exited, or until a signal is delivered whose action is to terminate the current process or to call a signal handling function. </P ><P > If a child as requested by <CODE CLASS="parameter" >pid</CODE > has already exited by the time of the call (a so-called "zombie" process), the function returns immediately. Any system resources used by the child are freed. Please see your system's waitpid(2) man page for specific details as to how waitpid works on your system. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN165322" ></A ><H2 >Parâmetros</H2 ><P > <P ></P ><DIV CLASS="variablelist" ><DL ><DT ><CODE CLASS="parameter" >pid</CODE ></DT ><DD ><P > The value of <CODE CLASS="parameter" >pid</CODE > can be one of the following: <DIV CLASS="table" ><A NAME="AEN165332" ></A ><P ><B >Tabela 1. possible values for <CODE CLASS="parameter" >pid</CODE ></B ></P ><TABLE BORDER="1" CLASS="CALSTABLE" ><COL><COL><TBODY ><TR ><TD ><TT CLASS="literal" >< -1</TT ></TD ><TD > wait for any child process whose process group ID is equal to the absolute value of <CODE CLASS="parameter" >pid</CODE >. </TD ></TR ><TR ><TD ><TT CLASS="literal" >-1</TT ></TD ><TD > wait for any child process; this is the same behaviour that the wait function exhibits. </TD ></TR ><TR ><TD ><TT CLASS="literal" >0</TT ></TD ><TD > wait for any child process whose process group ID is equal to that of the calling process. </TD ></TR ><TR ><TD ><TT CLASS="literal" >> 0</TT ></TD ><TD > wait for the child whose process ID is equal to the value of <CODE CLASS="parameter" >pid</CODE >. </TD ></TR ></TBODY ></TABLE ></DIV > </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >Nota: </B > Specifying <TT CLASS="literal" >-1</TT > as the <CODE CLASS="parameter" >pid</CODE > is equivalent to the functionality <A HREF="function.pcntl-wait.html" ><B CLASS="function" >pcntl_wait()</B ></A > provides (minus <CODE CLASS="parameter" >options</CODE >). </P ></BLOCKQUOTE ></DIV ></DD ><DT ><CODE CLASS="parameter" >status</CODE ></DT ><DD ><P > <B CLASS="function" >pcntl_waitpid()</B > will store status information in the <CODE CLASS="parameter" >status</CODE > parameter which can be evaluated using the following functions: <A HREF="function.pcntl-wifexited.html" ><B CLASS="function" >pcntl_wifexited()</B ></A >, <A HREF="function.pcntl-wifstopped.html" ><B CLASS="function" >pcntl_wifstopped()</B ></A >, <A HREF="function.pcntl-wifsignaled.html" ><B CLASS="function" >pcntl_wifsignaled()</B ></A >, <A HREF="function.pcntl-wexitstatus.html" ><B CLASS="function" >pcntl_wexitstatus()</B ></A >, <A HREF="function.pcntl-wtermsig.html" ><B CLASS="function" >pcntl_wtermsig()</B ></A > and <A HREF="function.pcntl-wstopsig.html" ><B CLASS="function" >pcntl_wstopsig()</B ></A >. </P ></DD ><DT ><CODE CLASS="parameter" >options</CODE ></DT ><DD ><P > The value of <CODE CLASS="parameter" >options</CODE > is the value of zero or more of the following two global constants <TT CLASS="literal" >OR</TT >'ed together: <DIV CLASS="table" ><A NAME="AEN165381" ></A ><P ><B >Tabela 2. possible values for <CODE CLASS="parameter" >options</CODE ></B ></P ><TABLE BORDER="1" CLASS="CALSTABLE" ><COL><COL><TBODY ><TR ><TD ><TT CLASS="literal" >WNOHANG</TT ></TD ><TD > return immediately if no child has exited. </TD ></TR ><TR ><TD ><TT CLASS="literal" >WUNTRACED</TT ></TD ><TD > return for children which are stopped, and whose status has not been reported. </TD ></TR ></TBODY ></TABLE ></DIV > </P ></DD ></DL ></DIV > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN165394" ></A ><H2 >Valores de retornado</H2 ><P > <B CLASS="function" >pcntl_waitpid()</B > returns the process ID of the child which exited, -1 on error or zero if WNOHANG was used and no child was available </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN165398" ></A ><H2 >Veja também</H2 ><P > <P ></P ><TABLE BORDER="0" ><TBODY ><TR ><TD ><A HREF="function.pcntl-fork.html" ><B CLASS="function" >pcntl_fork()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.pcntl-signal.html" ><B CLASS="function" >pcntl_signal()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.pcntl-wifexited.html" ><B CLASS="function" >pcntl_wifexited()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.pcntl-wifstopped.html" ><B CLASS="function" >pcntl_wifstopped()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.pcntl-wifsignaled.html" ><B CLASS="function" >pcntl_wifsignaled()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.pcntl-wexitstatus.html" ><B CLASS="function" >pcntl_wexitstatus()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.pcntl-wtermsig.html" ><B CLASS="function" >pcntl_wtermsig()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.pcntl-wstopsig.html" ><B CLASS="function" >pcntl_wstopsig()</B ></A ></TD ></TR ></TBODY ></TABLE ><P ></P > </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="function.pcntl-wait.html" ACCESSKEY="P" >Anterior</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Principal</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.pcntl-wexitstatus.html" ACCESSKEY="N" >Próxima</A ></TD ></TR ><TR ><TD WIDTH="33%" 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