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posix_mknod

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

posix_mknod Create a special or ordinary file (POSIX.1)

说明

posix_mknod(
    string $filename,
    int $flags,
    int $major = 0,
    int $minor = 0
): bool

Creates a special or ordinary file.

参数

filename

The file to create

flags

This parameter is constructed by a bitwise OR between file type (one of the following constants: POSIX_S_IFREG, POSIX_S_IFCHR, POSIX_S_IFBLK, POSIX_S_IFIFO or POSIX_S_IFSOCK) and permissions.

major

The major device kernel identifier (required to pass when using S_IFCHR or S_IFBLK).

minor

The minor device kernel identifier.

返回值

成功时返回 true, 或者在失败时返回 false

范例

示例 #1 A posix_mknod() example

<?php

$file
= '/tmp/tmpfile'; // file name
$type = POSIX_S_IFBLK; // file type
$permissions = 0777; // octal
$major = 1;
$minor = 8; // /dev/random

if (!posix_mknod($file, $type | $permissions, $major, $minor)) {
die(
'Error ' . posix_get_last_error() . ': ' . posix_strerror(posix_get_last_error()));
}

?>

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