pcntl_sigprocmask
(PHP 5 >= 5.3.0)
pcntl_sigprocmask — Sets and retrieves blocked signals
Description
bool pcntl_sigprocmask
( int $how
, array $set
[, array &$oldset
] )
The pcntl_sigprocmask() function adds, removes or sets blocked signals, depending on the how parameter.
Parameters
- how
-
Sets the behavior of pcntl_sigprocmask(). Possible values:
- SIG_BLOCK: Add the signals to the currently blocked signals.
- SIG_UNBLOCK: Remove the signals from the currently blocked signals.
- SIG_SETMASK: Replace the currently blocked signals by the given list of signals.
- set
-
List of signals.
- 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() example
<?php
pcntl_sigprocmask(SIG_BLOCK, array(SIGHUP));
$oldset = array();
pcntl_sigprocmask(SIG_UNBLOCK, array(SIGHUP), $oldset);
?>
See Also
- pcntl_sigwaitinfo() - Waits for signals
- pcntl_sigtimedwait() - Waits for signals, with a timeout