pcntl_sigwaitinfo

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

    pcntl_sigwaitinfo — Waits for signals

    Descripción

    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.

    Parámetros

    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

    Valores devueltos

    Returns a signal number on success, o false en caso de error.

    Historial de cambios

    Versión Descripción
    8.4.0 A ValueError is thrown if signal is empty.
    8.4.0 A TypeError is thrown if signal value is not an int.
    8.4.0 A ValueError is thrown if signal value is invalid.

    Ejemplos

    Ejemplo #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);
    ?>

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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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