SIGCHLD trace problem

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evchild

EVCHILD(3)								 1								EVCHILD(3)

The EvChild class

INTRODUCTION

       EvChild	watchers trigger when the process receives a SIGCHLD in response to some child status changes (most typically when a child dies or
       exits). It is permissible to install an EvChild watcher after the child has been forked(which implies it might  have  already  exited),	as
       long as the event loop isn't entered(or is continued from a watcher), i.e. forking and then immediately registering a watcher for the child
       is fine, but forking and registering a watcher a few event loop iterations later or in the next callback invocation is not.

	It is allowed to register EvChild watchers in the default loop only.

CLASS SYNOPSIS

       EvChild

       EvChildextends
       EvWatcher

       Properties

       o public$pid

       o public$rpid

       o public$rstatus

       Inherited properties

       o public$is_active

       o public$data

       o public$is_pending

       o public$priority

       Methods

       o public EvChild::__construct NULL (int	$pid, bool  $trace, callable  $callback, [mixed  $data], [int  $priority])

       o finalpublicstatic object EvChild::createStopped (int  $pid, bool  $trace, callable  $callback, [mixed	$data], [int  $priority])

       o public void EvChild::set (int	$pid, bool  $trace)

       Inherited methods

       o public int EvWatcher::clear (void  )

       o abstractpublic EvWatcher::__construct (void  )

       o public void EvWatcher::feed (int  $revents)

       o public EvLoop EvWatcher::getLoop (void  )

       o public void EvWatcher::invoke (int  $revents)

       o public bool EvWatcher::keepalive ([bool  $value])

       o public void EvWatcher::setCallback (callable  $callback)

       o public void EvWatcher::start (void  )

       o public void EvWatcher::stop (void  )

PROPERTIES

	      o $pid
		- Readonly . The process ID this watcher watches out for, or 0 , meaning any process ID.

	      o $rpid
		- Readonly .The process ID that detected a status change.

	      o $rstatus
		- Readonly . The process exit status caused by $rpid .

PHP Documentation Group 														EVCHILD(3)

Programming