pcntl_sigwaitinfo

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

pcntl_sigwaitinfo — Waits for signals

Beschreibung

pcntl_sigwaitinfo(array $signals, array &$info = []): int|false

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

Parameter-Liste

signals

Array of signals to wait for.

info

The info parameter is set to an array containing information about the signal.

The following elements are set for all signals:

signo: Signal number
errno: An error number
code: Signal code

The following elements may be set for the SIGCHLD signal:

status: Exit value or signal
utime: User time consumed
stime: System time consumed
pid: Sending process ID
uid: Real user ID of sending process

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

addr: Memory location which caused fault

The following element may be set for the SIGPOLL signal:

band: Band event
fd: File descriptor number

Rückgabewerte

Returns a signal number on success,Bei einem Fehler wird false zurückgegeben..

Beispiele

Beispiel #1 pcntl_sigwaitinfo() example

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

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

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

Siehe auch

pcntl_sigprocmask() - Sets and retrieves blocked signals
pcntl_sigtimedwait() - Waits for signals, with a timeout

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User Contributed Notes 1 note

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dave at mudsite dot com ¶

8 years ago


This function is not available on platforms that do not implement the underlying C function.  Included in this would be MaxOS[1], and FreeBSD[2]

[1] : http://opensource.apple.com//source/xnu/xnu-1456.1.26/bsd/sys/signal.h

[2] : http://fxr.watson.org/fxr/source/sys/signal.h?v=FREEBSD11

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