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><H1
><A
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>pcntl_wait</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN96474"
></A
><P
>    (PHP 5)</P
>pcntl_wait&nbsp;--&nbsp;
     Waits on or returns the status of a forked child
    </DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN96477"
></A
><H2
>Description</H2
>int <B
CLASS="methodname"
>pcntl_wait</B
> ( int &#38;status [, int options])<BR
></BR
><P
>&#13;     The wait function suspends execution of the current process until a
     child has exited, or until a signal is delivered whose action is to
     terminate the current process or to call a signal handling function.  If a
     child 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 wait(2) man page for
     specific details as to how wait works on your system.
    </P
><P
>&#13;     <B
CLASS="function"
>pcntl_wait()</B
> returns the process ID of the
     child which exited, -1 on error or zero if WNOHANG was provided as an
     option (on wait3-available systems) and no child was available.
    </P
><P
>&#13;     If wait3 is available on your system (mostly BSD-style systems), you can
     provide the optional <VAR
CLASS="parameter"
>options</VAR
> parameter.  If this
     parameter is not provided, wait will be used for the system call.  If
     wait3 is not available, providing a value for <VAR
CLASS="parameter"
>options
     </VAR
> will have no effect. The value of <VAR
CLASS="parameter"
>options
     </VAR
> is the value of zero or more of the following two constants
     <VAR
CLASS="literal"
>OR</VAR
>'ed together:
     <DIV
CLASS="table"
><A
NAME="AEN96496"
></A
><P
><B
>Tabel 1. Possible values for <VAR
CLASS="parameter"
>options</VAR
> if wait3 is available</B
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><COL><COL><TBODY
><TR
><TD
><VAR
CLASS="literal"
>WNOHANG</VAR
></TD
><TD
>&#13;          Return immediately if no child has exited.
         </TD
></TR
><TR
><TD
><VAR
CLASS="literal"
>WUNTRACED</VAR
></TD
><TD
>&#13;          Return for children which are stopped, and whose status has
          not been reported.
         </TD
></TR
></TBODY
></TABLE
></DIV
>
    </P
><P
>&#13;     <B
CLASS="function"
>pcntl_wait()</B
> will store status information
     in the <VAR
CLASS="parameter"
>status</VAR
> 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
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Not&#227;: </B
>
      This function is equivalent to calling <A
HREF="function.pcntl-waitpid.html"
><B
CLASS="function"
>pcntl_waitpid()</B
></A
>
      with a <VAR
CLASS="literal"
>-1</VAR
> <VAR
CLASS="parameter"
>pid</VAR
> and no
      <VAR
CLASS="parameter"
>options</VAR
>.
     </P
></BLOCKQUOTE
></DIV
><P
>&#13;     See also <A
HREF="function.pcntl-fork.html"
><B
CLASS="function"
>pcntl_fork()</B
></A
>,
     <A
HREF="function.pcntl-signal.html"
><B
CLASS="function"
>pcntl_signal()</B
></A
>,
     <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
>,
     <A
HREF="function.pcntl-wstopsig.html"
><B
CLASS="function"
>pcntl_wstopsig()</B
></A
> and
     <A
HREF="function.pcntl-waitpid.html"
><B
CLASS="function"
>pcntl_waitpid()</B
></A
>.
    </P
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