Php/docs/function.pcntl-sigprocmask

• PHP Manual
• PCNTL Functions
• Sets and retrieves blocked signals

pcntl_sigprocmask

(PHP 5 >= 5.3.0, PHP 7)

pcntl_sigprocmask — Sets and retrieves blocked signals

Description

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

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

<?phppcntl_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