PCNTL_SIGPROCMASK(3)							 1						      PCNTL_SIGPROCMASK(3)

pcntl_sigprocmask - Sets and retrieves blocked signals

SYNOPSIS

       bool pcntl_sigprocmask (int  $how, array  $set, [array  &$oldset])

DESCRIPTION

	The pcntl_sigprocmask(3) function adds, removes or sets blocked signals, depending on the $how parameter.

PARAMETERS

	      o $how
		- Sets the behavior of pcntl_sigprocmask(3). Possible values:

		     o SIG_BLOCK: Add the signals to the currently blocked signals.

		     o SIG_UNBLOCK: Remove the signals from the currently blocked signals.

		     o SIG_SETMASK: Replace the currently blocked signals by the given list of signals.

	      o $set
		- List of signals.

	      o $oldset
		- The $oldset parameter is set to an array containing the list of the previously blocked signals.

RETURN VALUES

	Returns TRUE on success or FALSE on failure.

EXAMPLES

       Example #1

	      pcntl_sigprocmask(3) example

	      <?php
	      pcntl_sigprocmask(SIG_BLOCK, array(SIGHUP));
	      $oldset = array();
	      pcntl_sigprocmask(SIG_UNBLOCK, array(SIGHUP), $oldset);
	      ?>

SEE ALSO

       pcntl_sigwaitinfo(3), pcntl_sigtimedwait(3).

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