posix_mknod
(PHP 5 >= 5.1.0, PHP 7, PHP 8)
posix_mknod — Create a special or ordinary file (POSIX.1)
說明
posix_mknod(
string
int
int
int
): bool
string
$filename,int
$flags,int
$major = 0,int
$minor = 0): bool
Creates a special or ordinary file.
參數
-
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_IFIFOorPOSIX_S_IFSOCK) and permissions. -
major -
The major device kernel identifier (required to pass when using
S_IFCHRorS_IFBLK). -
minor -
The minor device kernel identifier.
返回值
成功時返回 true， 或者在失敗時返回 false。
範例
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()));
}
?>