why printf() function don't go work? Post: 302273535

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pcntl_sigwaitinfo

PCNTL_SIGWAITINFO(3)							 1						      PCNTL_SIGWAITINFO(3)

pcntl_sigwaitinfo - Waits for signals

SYNOPSIS

       int pcntl_sigwaitinfo (array  $set, [array  &$siginfo])

DESCRIPTION

	The pcntl_sigwaitinfo(3) function suspends execution of the calling script until one of the signals given in $set are delivered. If one of
       the signal is already pending (e.g. blocked by pcntl_sigprocmask(3)), pcntl_sigwaitinfo(3) will return immediately.

PARAMETERS

	      o $set
		- Array of signals to wait for.

	      o $siginfo
		- The $siginfo parameter is set to an array containing informations about the signal.  The following elements are set for all sig-
		nals:

		     osigno: Signal number

		     oerrno: An error number

		     ocode: Signal code

	       The following elements may be set for the SIGCHLD signal:

		     ostatus: Exit value or signal

		     outime: User time consumed

		     ostime: System time consumed

		     opid: Sending process ID

		     ouid: Real user ID of sending process

	       The following elements may be set for the SIGILL, SIGFPE, SIGSEGV and SIGBUS signals:

		     oaddr: Memory location which caused fault

	       The following element may be set for the SIGPOLL signal:

		     oband: Band event

		     ofd: File descriptor number

RETURN VALUES

	On success, pcntl_sigwaitinfo(3) returns a signal number.

EXAMPLES

       Example #1

	      pcntl_sigwaitinfo(3) example

	      <?php
	      echo "Blocking SIGHUP signal
";
	      pcntl_sigprocmask(SIG_BLOCK, array(SIGHUP));

	      echo "Sending SIGHUP to self
";
	      posix_kill(posix_getpid(), SIGHUP);

	      echo "Waiting for signals
";
	      $info = array();
	      pcntl_sigwaitinfo(array(SIGHUP), $info);
	      ?>

SEE ALSO

       pcntl_sigprocmask(3), pcntl_sigtimedwait(3).

PHP Documentation Group 												      PCNTL_SIGWAITINFO(3)